bignp256 0.14.0-rc.10

//! Autogenerated: fiat-crypto word-by-word-montgomery --lang Rust --inline bignp256 32 '2^256 - 189' mul square add sub opp from_montgomery to_montgomery selectznz msat divstep divstep_precomp
//! curve description: bignp256
//! machine_wordsize = 32 (from "32")
//! requested operations: mul, square, add, sub, opp, from_montgomery, to_montgomery, selectznz, msat, divstep, divstep_precomp
//! m = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff43 (from "2^256 - 189")
//!
//! NOTE: In addition to the bounds specified above each function, all
//!   functions synthesized for this Montgomery arithmetic require the
//!   input to be strictly less than the prime modulus (m), and also
//!   require the input to be in the unique saturated representation.
//!   All functions also ensure that these two properties are true of
//!   return values.
//!
//! Computed values:
//!   eval z = z[0] + (z[1] << 32) + (z[2] << 64) + (z[3] << 96) + (z[4] << 128) + (z[5] << 160) + (z[6] << 192) + (z[7] << 224)
//!   bytes_eval z = z[0] + (z[1] << 8) + (z[2] << 16) + (z[3] << 24) + (z[4] << 32) + (z[5] << 40) + (z[6] << 48) + (z[7] << 56) + (z[8] << 64) + (z[9] << 72) + (z[10] << 80) + (z[11] << 88) + (z[12] << 96) + (z[13] << 104) + (z[14] << 112) + (z[15] << 120) + (z[16] << 128) + (z[17] << 136) + (z[18] << 144) + (z[19] << 152) + (z[20] << 160) + (z[21] << 168) + (z[22] << 176) + (z[23] << 184) + (z[24] << 192) + (z[25] << 200) + (z[26] << 208) + (z[27] << 216) + (z[28] << 224) + (z[29] << 232) + (z[30] << 240) + (z[31] << 248)
//!   twos_complement_eval z = let x1 := z[0] + (z[1] << 32) + (z[2] << 64) + (z[3] << 96) + (z[4] << 128) + (z[5] << 160) + (z[6] << 192) + (z[7] << 224) in
//!                            if x1 & (2^256-1) < 2^255 then x1 & (2^256-1) else (x1 & (2^256-1)) - 2^256

#![allow(unused_parens)]
#![allow(non_camel_case_types)]

/// Since `Index` and `IndexMut` aren't callable in `const` contexts yet, this helper type helps unify
/// arrays and user-defined array-wrapper types into a single type which can be indexed in `const`
/// contexts. Once `const trait`s are stabilized this type can go away
struct IndexConst<T: ?Sized>(T);

impl<'a, T, const N: usize> IndexConst<&'a [T; N]> {
    #[inline(always)]
    #[allow(unused)]
    const fn index(self, i: usize) -> &'a T {
        &self.0[i]
    }
}
impl<'a, 'b, T, const N: usize> IndexConst<&'a mut &'b mut [T; N]> {
    #[inline(always)]
    #[allow(unused)]
    const fn index_mut(self, i: usize) -> &'a mut T {
        &mut self.0[i]
    }
}

/** fiat_bignp256_u1 represents values of 1 bits, stored in one byte. */
pub type fiat_bignp256_u1 = u8;
/** fiat_bignp256_i1 represents values of 1 bits, stored in one byte. */
pub type fiat_bignp256_i1 = i8;
/** fiat_bignp256_u2 represents values of 2 bits, stored in one byte. */
pub type fiat_bignp256_u2 = u8;
/** fiat_bignp256_i2 represents values of 2 bits, stored in one byte. */
pub type fiat_bignp256_i2 = i8;

/** The type fiat_bignp256_montgomery_domain_field_element is a field element in the Montgomery domain. */
/** Bounds: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]] */
#[derive(Clone, Copy)]
pub struct fiat_bignp256_montgomery_domain_field_element(pub [u32; 8]);

impl core::ops::Index<usize> for fiat_bignp256_montgomery_domain_field_element {
    type Output = u32;
    #[inline]
    fn index(&self, index: usize) -> &Self::Output {
        &self.0[index]
    }
}

impl core::ops::IndexMut<usize> for fiat_bignp256_montgomery_domain_field_element {
    #[inline]
    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
        &mut self.0[index]
    }
}

impl<'a> IndexConst<&'a fiat_bignp256_montgomery_domain_field_element> {
    #[allow(unused)]
    #[inline(always)]
    const fn index(self, i: usize) -> &'a u32 {
        &self.0.0[i]
    }
}

impl<'a, 'b> IndexConst<&'a mut &'b mut fiat_bignp256_montgomery_domain_field_element> {
    #[allow(unused)]
    #[inline(always)]
    const fn index_mut(self, i: usize) -> &'a mut u32 {
        &mut self.0.0[i]
    }
}

/** The type fiat_bignp256_non_montgomery_domain_field_element is a field element NOT in the Montgomery domain. */
/** Bounds: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]] */
#[derive(Clone, Copy)]
pub struct fiat_bignp256_non_montgomery_domain_field_element(pub [u32; 8]);

impl core::ops::Index<usize> for fiat_bignp256_non_montgomery_domain_field_element {
    type Output = u32;
    #[inline]
    fn index(&self, index: usize) -> &Self::Output {
        &self.0[index]
    }
}

impl core::ops::IndexMut<usize> for fiat_bignp256_non_montgomery_domain_field_element {
    #[inline]
    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
        &mut self.0[index]
    }
}

impl<'a> IndexConst<&'a fiat_bignp256_non_montgomery_domain_field_element> {
    #[allow(unused)]
    #[inline(always)]
    const fn index(self, i: usize) -> &'a u32 {
        &self.0.0[i]
    }
}

impl<'a, 'b> IndexConst<&'a mut &'b mut fiat_bignp256_non_montgomery_domain_field_element> {
    #[allow(unused)]
    #[inline(always)]
    const fn index_mut(self, i: usize) -> &'a mut u32 {
        &mut self.0.0[i]
    }
}

/// The function fiat_bignp256_addcarryx_u32 is an addition with carry.
///
/// Postconditions:
///   out1 = (arg1 + arg2 + arg3) mod 2^32
///   out2 = ⌊(arg1 + arg2 + arg3) / 2^32⌋
///
/// Input Bounds:
///   arg1: [0x0 ~> 0x1]
///   arg2: [0x0 ~> 0xffffffff]
///   arg3: [0x0 ~> 0xffffffff]
/// Output Bounds:
///   out1: [0x0 ~> 0xffffffff]
///   out2: [0x0 ~> 0x1]
#[inline]
pub const fn fiat_bignp256_addcarryx_u32(
    out1: &mut u32,
    out2: &mut fiat_bignp256_u1,
    arg1: fiat_bignp256_u1,
    arg2: u32,
    arg3: u32,
) {
    let x1: u64 = (((arg1 as u64) + (arg2 as u64)) + (arg3 as u64));
    let x2: u32 = ((x1 & (0xffffffff as u64)) as u32);
    let x3: fiat_bignp256_u1 = ((x1 >> 32) as fiat_bignp256_u1);
    *out1 = x2;
    *out2 = x3;
}

/// The function fiat_bignp256_subborrowx_u32 is a subtraction with borrow.
///
/// Postconditions:
///   out1 = (-arg1 + arg2 + -arg3) mod 2^32
///   out2 = -⌊(-arg1 + arg2 + -arg3) / 2^32⌋
///
/// Input Bounds:
///   arg1: [0x0 ~> 0x1]
///   arg2: [0x0 ~> 0xffffffff]
///   arg3: [0x0 ~> 0xffffffff]
/// Output Bounds:
///   out1: [0x0 ~> 0xffffffff]
///   out2: [0x0 ~> 0x1]
#[inline]
pub const fn fiat_bignp256_subborrowx_u32(
    out1: &mut u32,
    out2: &mut fiat_bignp256_u1,
    arg1: fiat_bignp256_u1,
    arg2: u32,
    arg3: u32,
) {
    let x1: i64 = (((arg2 as i64) - (arg1 as i64)) - (arg3 as i64));
    let x2: fiat_bignp256_i1 = ((x1 >> 32) as fiat_bignp256_i1);
    let x3: u32 = ((x1 & (0xffffffff as i64)) as u32);
    *out1 = x3;
    *out2 = (((0x0 as fiat_bignp256_i2) - (x2 as fiat_bignp256_i2)) as fiat_bignp256_u1);
}

/// The function fiat_bignp256_mulx_u32 is a multiplication, returning the full double-width result.
///
/// Postconditions:
///   out1 = (arg1 * arg2) mod 2^32
///   out2 = ⌊arg1 * arg2 / 2^32⌋
///
/// Input Bounds:
///   arg1: [0x0 ~> 0xffffffff]
///   arg2: [0x0 ~> 0xffffffff]
/// Output Bounds:
///   out1: [0x0 ~> 0xffffffff]
///   out2: [0x0 ~> 0xffffffff]
#[inline]
pub const fn fiat_bignp256_mulx_u32(out1: &mut u32, out2: &mut u32, arg1: u32, arg2: u32) {
    let x1: u64 = ((arg1 as u64) * (arg2 as u64));
    let x2: u32 = ((x1 & (0xffffffff as u64)) as u32);
    let x3: u32 = ((x1 >> 32) as u32);
    *out1 = x2;
    *out2 = x3;
}

/// The function fiat_bignp256_cmovznz_u32 is a single-word conditional move.
///
/// Postconditions:
///   out1 = (if arg1 = 0 then arg2 else arg3)
///
/// Input Bounds:
///   arg1: [0x0 ~> 0x1]
///   arg2: [0x0 ~> 0xffffffff]
///   arg3: [0x0 ~> 0xffffffff]
/// Output Bounds:
///   out1: [0x0 ~> 0xffffffff]
#[inline]
pub const fn fiat_bignp256_cmovznz_u32(
    out1: &mut u32,
    arg1: fiat_bignp256_u1,
    arg2: u32,
    arg3: u32,
) {
    let x1: fiat_bignp256_u1 = (!(!arg1));
    let x2: u32 = ((((((0x0 as fiat_bignp256_i2) - (x1 as fiat_bignp256_i2)) as fiat_bignp256_i1)
        as i64)
        & (0xffffffff as i64)) as u32);
    let x3: u32 = ((x2 & arg3) | ((!x2) & arg2));
    *out1 = x3;
}

/// The function fiat_bignp256_mul multiplies two field elements in the Montgomery domain.
///
/// Preconditions:
///   0 ≤ eval arg1 < m
///   0 ≤ eval arg2 < m
/// Postconditions:
///   eval (from_montgomery out1) mod m = (eval (from_montgomery arg1) * eval (from_montgomery arg2)) mod m
///   0 ≤ eval out1 < m
///
#[inline]
pub const fn fiat_bignp256_mul(
    mut out1: &mut fiat_bignp256_montgomery_domain_field_element,
    arg1: &fiat_bignp256_montgomery_domain_field_element,
    arg2: &fiat_bignp256_montgomery_domain_field_element,
) {
    let x1: u32 = (*IndexConst(arg1).index(1));
    let x2: u32 = (*IndexConst(arg1).index(2));
    let x3: u32 = (*IndexConst(arg1).index(3));
    let x4: u32 = (*IndexConst(arg1).index(4));
    let x5: u32 = (*IndexConst(arg1).index(5));
    let x6: u32 = (*IndexConst(arg1).index(6));
    let x7: u32 = (*IndexConst(arg1).index(7));
    let x8: u32 = (*IndexConst(arg1).index(0));
    let mut x9: u32 = 0;
    let mut x10: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x9, &mut x10, x8, (*IndexConst(arg2).index(7)));
    let mut x11: u32 = 0;
    let mut x12: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x11, &mut x12, x8, (*IndexConst(arg2).index(6)));
    let mut x13: u32 = 0;
    let mut x14: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x13, &mut x14, x8, (*IndexConst(arg2).index(5)));
    let mut x15: u32 = 0;
    let mut x16: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x15, &mut x16, x8, (*IndexConst(arg2).index(4)));
    let mut x17: u32 = 0;
    let mut x18: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x17, &mut x18, x8, (*IndexConst(arg2).index(3)));
    let mut x19: u32 = 0;
    let mut x20: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x19, &mut x20, x8, (*IndexConst(arg2).index(2)));
    let mut x21: u32 = 0;
    let mut x22: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x21, &mut x22, x8, (*IndexConst(arg2).index(1)));
    let mut x23: u32 = 0;
    let mut x24: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x23, &mut x24, x8, (*IndexConst(arg2).index(0)));
    let mut x25: u32 = 0;
    let mut x26: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x25, &mut x26, 0x0, x24, x21);
    let mut x27: u32 = 0;
    let mut x28: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x27, &mut x28, x26, x22, x19);
    let mut x29: u32 = 0;
    let mut x30: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x29, &mut x30, x28, x20, x17);
    let mut x31: u32 = 0;
    let mut x32: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x31, &mut x32, x30, x18, x15);
    let mut x33: u32 = 0;
    let mut x34: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x33, &mut x34, x32, x16, x13);
    let mut x35: u32 = 0;
    let mut x36: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x35, &mut x36, x34, x14, x11);
    let mut x37: u32 = 0;
    let mut x38: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x37, &mut x38, x36, x12, x9);
    let x39: u32 = ((x38 as u32) + x10);
    let mut x40: u32 = 0;
    let mut x41: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x40, &mut x41, x23, 0xea53fa95);
    let mut x42: u32 = 0;
    let mut x43: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x42, &mut x43, x40, 0xffffffff);
    let mut x44: u32 = 0;
    let mut x45: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x44, &mut x45, x40, 0xffffffff);
    let mut x46: u32 = 0;
    let mut x47: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x46, &mut x47, x40, 0xffffffff);
    let mut x48: u32 = 0;
    let mut x49: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x48, &mut x49, x40, 0xffffffff);
    let mut x50: u32 = 0;
    let mut x51: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x50, &mut x51, x40, 0xffffffff);
    let mut x52: u32 = 0;
    let mut x53: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x52, &mut x53, x40, 0xffffffff);
    let mut x54: u32 = 0;
    let mut x55: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x54, &mut x55, x40, 0xffffffff);
    let mut x56: u32 = 0;
    let mut x57: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x56, &mut x57, x40, 0xffffff43);
    let mut x58: u32 = 0;
    let mut x59: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x58, &mut x59, 0x0, x57, x54);
    let mut x60: u32 = 0;
    let mut x61: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x60, &mut x61, x59, x55, x52);
    let mut x62: u32 = 0;
    let mut x63: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x62, &mut x63, x61, x53, x50);
    let mut x64: u32 = 0;
    let mut x65: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x64, &mut x65, x63, x51, x48);
    let mut x66: u32 = 0;
    let mut x67: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x66, &mut x67, x65, x49, x46);
    let mut x68: u32 = 0;
    let mut x69: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x68, &mut x69, x67, x47, x44);
    let mut x70: u32 = 0;
    let mut x71: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x70, &mut x71, x69, x45, x42);
    let x72: u32 = ((x71 as u32) + x43);
    let mut x73: u32 = 0;
    let mut x74: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x73, &mut x74, 0x0, x23, x56);
    let mut x75: u32 = 0;
    let mut x76: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x75, &mut x76, x74, x25, x58);
    let mut x77: u32 = 0;
    let mut x78: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x77, &mut x78, x76, x27, x60);
    let mut x79: u32 = 0;
    let mut x80: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x79, &mut x80, x78, x29, x62);
    let mut x81: u32 = 0;
    let mut x82: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x81, &mut x82, x80, x31, x64);
    let mut x83: u32 = 0;
    let mut x84: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x83, &mut x84, x82, x33, x66);
    let mut x85: u32 = 0;
    let mut x86: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x85, &mut x86, x84, x35, x68);
    let mut x87: u32 = 0;
    let mut x88: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x87, &mut x88, x86, x37, x70);
    let mut x89: u32 = 0;
    let mut x90: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x89, &mut x90, x88, x39, x72);
    let mut x91: u32 = 0;
    let mut x92: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x91, &mut x92, x1, (*IndexConst(arg2).index(7)));
    let mut x93: u32 = 0;
    let mut x94: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x93, &mut x94, x1, (*IndexConst(arg2).index(6)));
    let mut x95: u32 = 0;
    let mut x96: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x95, &mut x96, x1, (*IndexConst(arg2).index(5)));
    let mut x97: u32 = 0;
    let mut x98: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x97, &mut x98, x1, (*IndexConst(arg2).index(4)));
    let mut x99: u32 = 0;
    let mut x100: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x99, &mut x100, x1, (*IndexConst(arg2).index(3)));
    let mut x101: u32 = 0;
    let mut x102: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x101, &mut x102, x1, (*IndexConst(arg2).index(2)));
    let mut x103: u32 = 0;
    let mut x104: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x103, &mut x104, x1, (*IndexConst(arg2).index(1)));
    let mut x105: u32 = 0;
    let mut x106: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x105, &mut x106, x1, (*IndexConst(arg2).index(0)));
    let mut x107: u32 = 0;
    let mut x108: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x107, &mut x108, 0x0, x106, x103);
    let mut x109: u32 = 0;
    let mut x110: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x109, &mut x110, x108, x104, x101);
    let mut x111: u32 = 0;
    let mut x112: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x111, &mut x112, x110, x102, x99);
    let mut x113: u32 = 0;
    let mut x114: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x113, &mut x114, x112, x100, x97);
    let mut x115: u32 = 0;
    let mut x116: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x115, &mut x116, x114, x98, x95);
    let mut x117: u32 = 0;
    let mut x118: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x117, &mut x118, x116, x96, x93);
    let mut x119: u32 = 0;
    let mut x120: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x119, &mut x120, x118, x94, x91);
    let x121: u32 = ((x120 as u32) + x92);
    let mut x122: u32 = 0;
    let mut x123: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x122, &mut x123, 0x0, x75, x105);
    let mut x124: u32 = 0;
    let mut x125: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x124, &mut x125, x123, x77, x107);
    let mut x126: u32 = 0;
    let mut x127: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x126, &mut x127, x125, x79, x109);
    let mut x128: u32 = 0;
    let mut x129: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x128, &mut x129, x127, x81, x111);
    let mut x130: u32 = 0;
    let mut x131: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x130, &mut x131, x129, x83, x113);
    let mut x132: u32 = 0;
    let mut x133: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x132, &mut x133, x131, x85, x115);
    let mut x134: u32 = 0;
    let mut x135: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x134, &mut x135, x133, x87, x117);
    let mut x136: u32 = 0;
    let mut x137: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x136, &mut x137, x135, x89, x119);
    let mut x138: u32 = 0;
    let mut x139: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x138, &mut x139, x137, (x90 as u32), x121);
    let mut x140: u32 = 0;
    let mut x141: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x140, &mut x141, x122, 0xea53fa95);
    let mut x142: u32 = 0;
    let mut x143: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x142, &mut x143, x140, 0xffffffff);
    let mut x144: u32 = 0;
    let mut x145: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x144, &mut x145, x140, 0xffffffff);
    let mut x146: u32 = 0;
    let mut x147: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x146, &mut x147, x140, 0xffffffff);
    let mut x148: u32 = 0;
    let mut x149: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x148, &mut x149, x140, 0xffffffff);
    let mut x150: u32 = 0;
    let mut x151: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x150, &mut x151, x140, 0xffffffff);
    let mut x152: u32 = 0;
    let mut x153: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x152, &mut x153, x140, 0xffffffff);
    let mut x154: u32 = 0;
    let mut x155: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x154, &mut x155, x140, 0xffffffff);
    let mut x156: u32 = 0;
    let mut x157: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x156, &mut x157, x140, 0xffffff43);
    let mut x158: u32 = 0;
    let mut x159: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x158, &mut x159, 0x0, x157, x154);
    let mut x160: u32 = 0;
    let mut x161: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x160, &mut x161, x159, x155, x152);
    let mut x162: u32 = 0;
    let mut x163: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x162, &mut x163, x161, x153, x150);
    let mut x164: u32 = 0;
    let mut x165: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x164, &mut x165, x163, x151, x148);
    let mut x166: u32 = 0;
    let mut x167: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x166, &mut x167, x165, x149, x146);
    let mut x168: u32 = 0;
    let mut x169: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x168, &mut x169, x167, x147, x144);
    let mut x170: u32 = 0;
    let mut x171: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x170, &mut x171, x169, x145, x142);
    let x172: u32 = ((x171 as u32) + x143);
    let mut x173: u32 = 0;
    let mut x174: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x173, &mut x174, 0x0, x122, x156);
    let mut x175: u32 = 0;
    let mut x176: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x175, &mut x176, x174, x124, x158);
    let mut x177: u32 = 0;
    let mut x178: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x177, &mut x178, x176, x126, x160);
    let mut x179: u32 = 0;
    let mut x180: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x179, &mut x180, x178, x128, x162);
    let mut x181: u32 = 0;
    let mut x182: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x181, &mut x182, x180, x130, x164);
    let mut x183: u32 = 0;
    let mut x184: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x183, &mut x184, x182, x132, x166);
    let mut x185: u32 = 0;
    let mut x186: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x185, &mut x186, x184, x134, x168);
    let mut x187: u32 = 0;
    let mut x188: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x187, &mut x188, x186, x136, x170);
    let mut x189: u32 = 0;
    let mut x190: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x189, &mut x190, x188, x138, x172);
    let x191: u32 = ((x190 as u32) + (x139 as u32));
    let mut x192: u32 = 0;
    let mut x193: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x192, &mut x193, x2, (*IndexConst(arg2).index(7)));
    let mut x194: u32 = 0;
    let mut x195: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x194, &mut x195, x2, (*IndexConst(arg2).index(6)));
    let mut x196: u32 = 0;
    let mut x197: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x196, &mut x197, x2, (*IndexConst(arg2).index(5)));
    let mut x198: u32 = 0;
    let mut x199: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x198, &mut x199, x2, (*IndexConst(arg2).index(4)));
    let mut x200: u32 = 0;
    let mut x201: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x200, &mut x201, x2, (*IndexConst(arg2).index(3)));
    let mut x202: u32 = 0;
    let mut x203: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x202, &mut x203, x2, (*IndexConst(arg2).index(2)));
    let mut x204: u32 = 0;
    let mut x205: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x204, &mut x205, x2, (*IndexConst(arg2).index(1)));
    let mut x206: u32 = 0;
    let mut x207: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x206, &mut x207, x2, (*IndexConst(arg2).index(0)));
    let mut x208: u32 = 0;
    let mut x209: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x208, &mut x209, 0x0, x207, x204);
    let mut x210: u32 = 0;
    let mut x211: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x210, &mut x211, x209, x205, x202);
    let mut x212: u32 = 0;
    let mut x213: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x212, &mut x213, x211, x203, x200);
    let mut x214: u32 = 0;
    let mut x215: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x214, &mut x215, x213, x201, x198);
    let mut x216: u32 = 0;
    let mut x217: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x216, &mut x217, x215, x199, x196);
    let mut x218: u32 = 0;
    let mut x219: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x218, &mut x219, x217, x197, x194);
    let mut x220: u32 = 0;
    let mut x221: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x220, &mut x221, x219, x195, x192);
    let x222: u32 = ((x221 as u32) + x193);
    let mut x223: u32 = 0;
    let mut x224: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x223, &mut x224, 0x0, x175, x206);
    let mut x225: u32 = 0;
    let mut x226: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x225, &mut x226, x224, x177, x208);
    let mut x227: u32 = 0;
    let mut x228: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x227, &mut x228, x226, x179, x210);
    let mut x229: u32 = 0;
    let mut x230: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x229, &mut x230, x228, x181, x212);
    let mut x231: u32 = 0;
    let mut x232: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x231, &mut x232, x230, x183, x214);
    let mut x233: u32 = 0;
    let mut x234: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x233, &mut x234, x232, x185, x216);
    let mut x235: u32 = 0;
    let mut x236: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x235, &mut x236, x234, x187, x218);
    let mut x237: u32 = 0;
    let mut x238: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x237, &mut x238, x236, x189, x220);
    let mut x239: u32 = 0;
    let mut x240: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x239, &mut x240, x238, x191, x222);
    let mut x241: u32 = 0;
    let mut x242: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x241, &mut x242, x223, 0xea53fa95);
    let mut x243: u32 = 0;
    let mut x244: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x243, &mut x244, x241, 0xffffffff);
    let mut x245: u32 = 0;
    let mut x246: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x245, &mut x246, x241, 0xffffffff);
    let mut x247: u32 = 0;
    let mut x248: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x247, &mut x248, x241, 0xffffffff);
    let mut x249: u32 = 0;
    let mut x250: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x249, &mut x250, x241, 0xffffffff);
    let mut x251: u32 = 0;
    let mut x252: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x251, &mut x252, x241, 0xffffffff);
    let mut x253: u32 = 0;
    let mut x254: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x253, &mut x254, x241, 0xffffffff);
    let mut x255: u32 = 0;
    let mut x256: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x255, &mut x256, x241, 0xffffffff);
    let mut x257: u32 = 0;
    let mut x258: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x257, &mut x258, x241, 0xffffff43);
    let mut x259: u32 = 0;
    let mut x260: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x259, &mut x260, 0x0, x258, x255);
    let mut x261: u32 = 0;
    let mut x262: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x261, &mut x262, x260, x256, x253);
    let mut x263: u32 = 0;
    let mut x264: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x263, &mut x264, x262, x254, x251);
    let mut x265: u32 = 0;
    let mut x266: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x265, &mut x266, x264, x252, x249);
    let mut x267: u32 = 0;
    let mut x268: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x267, &mut x268, x266, x250, x247);
    let mut x269: u32 = 0;
    let mut x270: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x269, &mut x270, x268, x248, x245);
    let mut x271: u32 = 0;
    let mut x272: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x271, &mut x272, x270, x246, x243);
    let x273: u32 = ((x272 as u32) + x244);
    let mut x274: u32 = 0;
    let mut x275: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x274, &mut x275, 0x0, x223, x257);
    let mut x276: u32 = 0;
    let mut x277: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x276, &mut x277, x275, x225, x259);
    let mut x278: u32 = 0;
    let mut x279: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x278, &mut x279, x277, x227, x261);
    let mut x280: u32 = 0;
    let mut x281: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x280, &mut x281, x279, x229, x263);
    let mut x282: u32 = 0;
    let mut x283: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x282, &mut x283, x281, x231, x265);
    let mut x284: u32 = 0;
    let mut x285: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x284, &mut x285, x283, x233, x267);
    let mut x286: u32 = 0;
    let mut x287: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x286, &mut x287, x285, x235, x269);
    let mut x288: u32 = 0;
    let mut x289: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x288, &mut x289, x287, x237, x271);
    let mut x290: u32 = 0;
    let mut x291: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x290, &mut x291, x289, x239, x273);
    let x292: u32 = ((x291 as u32) + (x240 as u32));
    let mut x293: u32 = 0;
    let mut x294: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x293, &mut x294, x3, (*IndexConst(arg2).index(7)));
    let mut x295: u32 = 0;
    let mut x296: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x295, &mut x296, x3, (*IndexConst(arg2).index(6)));
    let mut x297: u32 = 0;
    let mut x298: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x297, &mut x298, x3, (*IndexConst(arg2).index(5)));
    let mut x299: u32 = 0;
    let mut x300: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x299, &mut x300, x3, (*IndexConst(arg2).index(4)));
    let mut x301: u32 = 0;
    let mut x302: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x301, &mut x302, x3, (*IndexConst(arg2).index(3)));
    let mut x303: u32 = 0;
    let mut x304: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x303, &mut x304, x3, (*IndexConst(arg2).index(2)));
    let mut x305: u32 = 0;
    let mut x306: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x305, &mut x306, x3, (*IndexConst(arg2).index(1)));
    let mut x307: u32 = 0;
    let mut x308: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x307, &mut x308, x3, (*IndexConst(arg2).index(0)));
    let mut x309: u32 = 0;
    let mut x310: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x309, &mut x310, 0x0, x308, x305);
    let mut x311: u32 = 0;
    let mut x312: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x311, &mut x312, x310, x306, x303);
    let mut x313: u32 = 0;
    let mut x314: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x313, &mut x314, x312, x304, x301);
    let mut x315: u32 = 0;
    let mut x316: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x315, &mut x316, x314, x302, x299);
    let mut x317: u32 = 0;
    let mut x318: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x317, &mut x318, x316, x300, x297);
    let mut x319: u32 = 0;
    let mut x320: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x319, &mut x320, x318, x298, x295);
    let mut x321: u32 = 0;
    let mut x322: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x321, &mut x322, x320, x296, x293);
    let x323: u32 = ((x322 as u32) + x294);
    let mut x324: u32 = 0;
    let mut x325: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x324, &mut x325, 0x0, x276, x307);
    let mut x326: u32 = 0;
    let mut x327: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x326, &mut x327, x325, x278, x309);
    let mut x328: u32 = 0;
    let mut x329: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x328, &mut x329, x327, x280, x311);
    let mut x330: u32 = 0;
    let mut x331: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x330, &mut x331, x329, x282, x313);
    let mut x332: u32 = 0;
    let mut x333: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x332, &mut x333, x331, x284, x315);
    let mut x334: u32 = 0;
    let mut x335: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x334, &mut x335, x333, x286, x317);
    let mut x336: u32 = 0;
    let mut x337: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x336, &mut x337, x335, x288, x319);
    let mut x338: u32 = 0;
    let mut x339: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x338, &mut x339, x337, x290, x321);
    let mut x340: u32 = 0;
    let mut x341: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x340, &mut x341, x339, x292, x323);
    let mut x342: u32 = 0;
    let mut x343: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x342, &mut x343, x324, 0xea53fa95);
    let mut x344: u32 = 0;
    let mut x345: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x344, &mut x345, x342, 0xffffffff);
    let mut x346: u32 = 0;
    let mut x347: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x346, &mut x347, x342, 0xffffffff);
    let mut x348: u32 = 0;
    let mut x349: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x348, &mut x349, x342, 0xffffffff);
    let mut x350: u32 = 0;
    let mut x351: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x350, &mut x351, x342, 0xffffffff);
    let mut x352: u32 = 0;
    let mut x353: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x352, &mut x353, x342, 0xffffffff);
    let mut x354: u32 = 0;
    let mut x355: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x354, &mut x355, x342, 0xffffffff);
    let mut x356: u32 = 0;
    let mut x357: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x356, &mut x357, x342, 0xffffffff);
    let mut x358: u32 = 0;
    let mut x359: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x358, &mut x359, x342, 0xffffff43);
    let mut x360: u32 = 0;
    let mut x361: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x360, &mut x361, 0x0, x359, x356);
    let mut x362: u32 = 0;
    let mut x363: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x362, &mut x363, x361, x357, x354);
    let mut x364: u32 = 0;
    let mut x365: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x364, &mut x365, x363, x355, x352);
    let mut x366: u32 = 0;
    let mut x367: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x366, &mut x367, x365, x353, x350);
    let mut x368: u32 = 0;
    let mut x369: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x368, &mut x369, x367, x351, x348);
    let mut x370: u32 = 0;
    let mut x371: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x370, &mut x371, x369, x349, x346);
    let mut x372: u32 = 0;
    let mut x373: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x372, &mut x373, x371, x347, x344);
    let x374: u32 = ((x373 as u32) + x345);
    let mut x375: u32 = 0;
    let mut x376: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x375, &mut x376, 0x0, x324, x358);
    let mut x377: u32 = 0;
    let mut x378: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x377, &mut x378, x376, x326, x360);
    let mut x379: u32 = 0;
    let mut x380: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x379, &mut x380, x378, x328, x362);
    let mut x381: u32 = 0;
    let mut x382: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x381, &mut x382, x380, x330, x364);
    let mut x383: u32 = 0;
    let mut x384: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x383, &mut x384, x382, x332, x366);
    let mut x385: u32 = 0;
    let mut x386: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x385, &mut x386, x384, x334, x368);
    let mut x387: u32 = 0;
    let mut x388: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x387, &mut x388, x386, x336, x370);
    let mut x389: u32 = 0;
    let mut x390: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x389, &mut x390, x388, x338, x372);
    let mut x391: u32 = 0;
    let mut x392: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x391, &mut x392, x390, x340, x374);
    let x393: u32 = ((x392 as u32) + (x341 as u32));
    let mut x394: u32 = 0;
    let mut x395: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x394, &mut x395, x4, (*IndexConst(arg2).index(7)));
    let mut x396: u32 = 0;
    let mut x397: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x396, &mut x397, x4, (*IndexConst(arg2).index(6)));
    let mut x398: u32 = 0;
    let mut x399: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x398, &mut x399, x4, (*IndexConst(arg2).index(5)));
    let mut x400: u32 = 0;
    let mut x401: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x400, &mut x401, x4, (*IndexConst(arg2).index(4)));
    let mut x402: u32 = 0;
    let mut x403: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x402, &mut x403, x4, (*IndexConst(arg2).index(3)));
    let mut x404: u32 = 0;
    let mut x405: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x404, &mut x405, x4, (*IndexConst(arg2).index(2)));
    let mut x406: u32 = 0;
    let mut x407: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x406, &mut x407, x4, (*IndexConst(arg2).index(1)));
    let mut x408: u32 = 0;
    let mut x409: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x408, &mut x409, x4, (*IndexConst(arg2).index(0)));
    let mut x410: u32 = 0;
    let mut x411: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x410, &mut x411, 0x0, x409, x406);
    let mut x412: u32 = 0;
    let mut x413: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x412, &mut x413, x411, x407, x404);
    let mut x414: u32 = 0;
    let mut x415: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x414, &mut x415, x413, x405, x402);
    let mut x416: u32 = 0;
    let mut x417: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x416, &mut x417, x415, x403, x400);
    let mut x418: u32 = 0;
    let mut x419: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x418, &mut x419, x417, x401, x398);
    let mut x420: u32 = 0;
    let mut x421: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x420, &mut x421, x419, x399, x396);
    let mut x422: u32 = 0;
    let mut x423: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x422, &mut x423, x421, x397, x394);
    let x424: u32 = ((x423 as u32) + x395);
    let mut x425: u32 = 0;
    let mut x426: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x425, &mut x426, 0x0, x377, x408);
    let mut x427: u32 = 0;
    let mut x428: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x427, &mut x428, x426, x379, x410);
    let mut x429: u32 = 0;
    let mut x430: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x429, &mut x430, x428, x381, x412);
    let mut x431: u32 = 0;
    let mut x432: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x431, &mut x432, x430, x383, x414);
    let mut x433: u32 = 0;
    let mut x434: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x433, &mut x434, x432, x385, x416);
    let mut x435: u32 = 0;
    let mut x436: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x435, &mut x436, x434, x387, x418);
    let mut x437: u32 = 0;
    let mut x438: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x437, &mut x438, x436, x389, x420);
    let mut x439: u32 = 0;
    let mut x440: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x439, &mut x440, x438, x391, x422);
    let mut x441: u32 = 0;
    let mut x442: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x441, &mut x442, x440, x393, x424);
    let mut x443: u32 = 0;
    let mut x444: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x443, &mut x444, x425, 0xea53fa95);
    let mut x445: u32 = 0;
    let mut x446: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x445, &mut x446, x443, 0xffffffff);
    let mut x447: u32 = 0;
    let mut x448: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x447, &mut x448, x443, 0xffffffff);
    let mut x449: u32 = 0;
    let mut x450: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x449, &mut x450, x443, 0xffffffff);
    let mut x451: u32 = 0;
    let mut x452: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x451, &mut x452, x443, 0xffffffff);
    let mut x453: u32 = 0;
    let mut x454: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x453, &mut x454, x443, 0xffffffff);
    let mut x455: u32 = 0;
    let mut x456: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x455, &mut x456, x443, 0xffffffff);
    let mut x457: u32 = 0;
    let mut x458: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x457, &mut x458, x443, 0xffffffff);
    let mut x459: u32 = 0;
    let mut x460: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x459, &mut x460, x443, 0xffffff43);
    let mut x461: u32 = 0;
    let mut x462: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x461, &mut x462, 0x0, x460, x457);
    let mut x463: u32 = 0;
    let mut x464: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x463, &mut x464, x462, x458, x455);
    let mut x465: u32 = 0;
    let mut x466: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x465, &mut x466, x464, x456, x453);
    let mut x467: u32 = 0;
    let mut x468: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x467, &mut x468, x466, x454, x451);
    let mut x469: u32 = 0;
    let mut x470: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x469, &mut x470, x468, x452, x449);
    let mut x471: u32 = 0;
    let mut x472: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x471, &mut x472, x470, x450, x447);
    let mut x473: u32 = 0;
    let mut x474: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x473, &mut x474, x472, x448, x445);
    let x475: u32 = ((x474 as u32) + x446);
    let mut x476: u32 = 0;
    let mut x477: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x476, &mut x477, 0x0, x425, x459);
    let mut x478: u32 = 0;
    let mut x479: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x478, &mut x479, x477, x427, x461);
    let mut x480: u32 = 0;
    let mut x481: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x480, &mut x481, x479, x429, x463);
    let mut x482: u32 = 0;
    let mut x483: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x482, &mut x483, x481, x431, x465);
    let mut x484: u32 = 0;
    let mut x485: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x484, &mut x485, x483, x433, x467);
    let mut x486: u32 = 0;
    let mut x487: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x486, &mut x487, x485, x435, x469);
    let mut x488: u32 = 0;
    let mut x489: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x488, &mut x489, x487, x437, x471);
    let mut x490: u32 = 0;
    let mut x491: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x490, &mut x491, x489, x439, x473);
    let mut x492: u32 = 0;
    let mut x493: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x492, &mut x493, x491, x441, x475);
    let x494: u32 = ((x493 as u32) + (x442 as u32));
    let mut x495: u32 = 0;
    let mut x496: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x495, &mut x496, x5, (*IndexConst(arg2).index(7)));
    let mut x497: u32 = 0;
    let mut x498: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x497, &mut x498, x5, (*IndexConst(arg2).index(6)));
    let mut x499: u32 = 0;
    let mut x500: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x499, &mut x500, x5, (*IndexConst(arg2).index(5)));
    let mut x501: u32 = 0;
    let mut x502: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x501, &mut x502, x5, (*IndexConst(arg2).index(4)));
    let mut x503: u32 = 0;
    let mut x504: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x503, &mut x504, x5, (*IndexConst(arg2).index(3)));
    let mut x505: u32 = 0;
    let mut x506: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x505, &mut x506, x5, (*IndexConst(arg2).index(2)));
    let mut x507: u32 = 0;
    let mut x508: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x507, &mut x508, x5, (*IndexConst(arg2).index(1)));
    let mut x509: u32 = 0;
    let mut x510: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x509, &mut x510, x5, (*IndexConst(arg2).index(0)));
    let mut x511: u32 = 0;
    let mut x512: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x511, &mut x512, 0x0, x510, x507);
    let mut x513: u32 = 0;
    let mut x514: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x513, &mut x514, x512, x508, x505);
    let mut x515: u32 = 0;
    let mut x516: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x515, &mut x516, x514, x506, x503);
    let mut x517: u32 = 0;
    let mut x518: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x517, &mut x518, x516, x504, x501);
    let mut x519: u32 = 0;
    let mut x520: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x519, &mut x520, x518, x502, x499);
    let mut x521: u32 = 0;
    let mut x522: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x521, &mut x522, x520, x500, x497);
    let mut x523: u32 = 0;
    let mut x524: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x523, &mut x524, x522, x498, x495);
    let x525: u32 = ((x524 as u32) + x496);
    let mut x526: u32 = 0;
    let mut x527: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x526, &mut x527, 0x0, x478, x509);
    let mut x528: u32 = 0;
    let mut x529: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x528, &mut x529, x527, x480, x511);
    let mut x530: u32 = 0;
    let mut x531: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x530, &mut x531, x529, x482, x513);
    let mut x532: u32 = 0;
    let mut x533: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x532, &mut x533, x531, x484, x515);
    let mut x534: u32 = 0;
    let mut x535: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x534, &mut x535, x533, x486, x517);
    let mut x536: u32 = 0;
    let mut x537: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x536, &mut x537, x535, x488, x519);
    let mut x538: u32 = 0;
    let mut x539: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x538, &mut x539, x537, x490, x521);
    let mut x540: u32 = 0;
    let mut x541: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x540, &mut x541, x539, x492, x523);
    let mut x542: u32 = 0;
    let mut x543: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x542, &mut x543, x541, x494, x525);
    let mut x544: u32 = 0;
    let mut x545: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x544, &mut x545, x526, 0xea53fa95);
    let mut x546: u32 = 0;
    let mut x547: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x546, &mut x547, x544, 0xffffffff);
    let mut x548: u32 = 0;
    let mut x549: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x548, &mut x549, x544, 0xffffffff);
    let mut x550: u32 = 0;
    let mut x551: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x550, &mut x551, x544, 0xffffffff);
    let mut x552: u32 = 0;
    let mut x553: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x552, &mut x553, x544, 0xffffffff);
    let mut x554: u32 = 0;
    let mut x555: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x554, &mut x555, x544, 0xffffffff);
    let mut x556: u32 = 0;
    let mut x557: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x556, &mut x557, x544, 0xffffffff);
    let mut x558: u32 = 0;
    let mut x559: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x558, &mut x559, x544, 0xffffffff);
    let mut x560: u32 = 0;
    let mut x561: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x560, &mut x561, x544, 0xffffff43);
    let mut x562: u32 = 0;
    let mut x563: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x562, &mut x563, 0x0, x561, x558);
    let mut x564: u32 = 0;
    let mut x565: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x564, &mut x565, x563, x559, x556);
    let mut x566: u32 = 0;
    let mut x567: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x566, &mut x567, x565, x557, x554);
    let mut x568: u32 = 0;
    let mut x569: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x568, &mut x569, x567, x555, x552);
    let mut x570: u32 = 0;
    let mut x571: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x570, &mut x571, x569, x553, x550);
    let mut x572: u32 = 0;
    let mut x573: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x572, &mut x573, x571, x551, x548);
    let mut x574: u32 = 0;
    let mut x575: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x574, &mut x575, x573, x549, x546);
    let x576: u32 = ((x575 as u32) + x547);
    let mut x577: u32 = 0;
    let mut x578: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x577, &mut x578, 0x0, x526, x560);
    let mut x579: u32 = 0;
    let mut x580: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x579, &mut x580, x578, x528, x562);
    let mut x581: u32 = 0;
    let mut x582: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x581, &mut x582, x580, x530, x564);
    let mut x583: u32 = 0;
    let mut x584: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x583, &mut x584, x582, x532, x566);
    let mut x585: u32 = 0;
    let mut x586: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x585, &mut x586, x584, x534, x568);
    let mut x587: u32 = 0;
    let mut x588: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x587, &mut x588, x586, x536, x570);
    let mut x589: u32 = 0;
    let mut x590: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x589, &mut x590, x588, x538, x572);
    let mut x591: u32 = 0;
    let mut x592: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x591, &mut x592, x590, x540, x574);
    let mut x593: u32 = 0;
    let mut x594: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x593, &mut x594, x592, x542, x576);
    let x595: u32 = ((x594 as u32) + (x543 as u32));
    let mut x596: u32 = 0;
    let mut x597: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x596, &mut x597, x6, (*IndexConst(arg2).index(7)));
    let mut x598: u32 = 0;
    let mut x599: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x598, &mut x599, x6, (*IndexConst(arg2).index(6)));
    let mut x600: u32 = 0;
    let mut x601: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x600, &mut x601, x6, (*IndexConst(arg2).index(5)));
    let mut x602: u32 = 0;
    let mut x603: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x602, &mut x603, x6, (*IndexConst(arg2).index(4)));
    let mut x604: u32 = 0;
    let mut x605: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x604, &mut x605, x6, (*IndexConst(arg2).index(3)));
    let mut x606: u32 = 0;
    let mut x607: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x606, &mut x607, x6, (*IndexConst(arg2).index(2)));
    let mut x608: u32 = 0;
    let mut x609: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x608, &mut x609, x6, (*IndexConst(arg2).index(1)));
    let mut x610: u32 = 0;
    let mut x611: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x610, &mut x611, x6, (*IndexConst(arg2).index(0)));
    let mut x612: u32 = 0;
    let mut x613: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x612, &mut x613, 0x0, x611, x608);
    let mut x614: u32 = 0;
    let mut x615: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x614, &mut x615, x613, x609, x606);
    let mut x616: u32 = 0;
    let mut x617: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x616, &mut x617, x615, x607, x604);
    let mut x618: u32 = 0;
    let mut x619: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x618, &mut x619, x617, x605, x602);
    let mut x620: u32 = 0;
    let mut x621: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x620, &mut x621, x619, x603, x600);
    let mut x622: u32 = 0;
    let mut x623: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x622, &mut x623, x621, x601, x598);
    let mut x624: u32 = 0;
    let mut x625: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x624, &mut x625, x623, x599, x596);
    let x626: u32 = ((x625 as u32) + x597);
    let mut x627: u32 = 0;
    let mut x628: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x627, &mut x628, 0x0, x579, x610);
    let mut x629: u32 = 0;
    let mut x630: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x629, &mut x630, x628, x581, x612);
    let mut x631: u32 = 0;
    let mut x632: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x631, &mut x632, x630, x583, x614);
    let mut x633: u32 = 0;
    let mut x634: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x633, &mut x634, x632, x585, x616);
    let mut x635: u32 = 0;
    let mut x636: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x635, &mut x636, x634, x587, x618);
    let mut x637: u32 = 0;
    let mut x638: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x637, &mut x638, x636, x589, x620);
    let mut x639: u32 = 0;
    let mut x640: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x639, &mut x640, x638, x591, x622);
    let mut x641: u32 = 0;
    let mut x642: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x641, &mut x642, x640, x593, x624);
    let mut x643: u32 = 0;
    let mut x644: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x643, &mut x644, x642, x595, x626);
    let mut x645: u32 = 0;
    let mut x646: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x645, &mut x646, x627, 0xea53fa95);
    let mut x647: u32 = 0;
    let mut x648: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x647, &mut x648, x645, 0xffffffff);
    let mut x649: u32 = 0;
    let mut x650: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x649, &mut x650, x645, 0xffffffff);
    let mut x651: u32 = 0;
    let mut x652: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x651, &mut x652, x645, 0xffffffff);
    let mut x653: u32 = 0;
    let mut x654: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x653, &mut x654, x645, 0xffffffff);
    let mut x655: u32 = 0;
    let mut x656: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x655, &mut x656, x645, 0xffffffff);
    let mut x657: u32 = 0;
    let mut x658: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x657, &mut x658, x645, 0xffffffff);
    let mut x659: u32 = 0;
    let mut x660: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x659, &mut x660, x645, 0xffffffff);
    let mut x661: u32 = 0;
    let mut x662: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x661, &mut x662, x645, 0xffffff43);
    let mut x663: u32 = 0;
    let mut x664: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x663, &mut x664, 0x0, x662, x659);
    let mut x665: u32 = 0;
    let mut x666: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x665, &mut x666, x664, x660, x657);
    let mut x667: u32 = 0;
    let mut x668: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x667, &mut x668, x666, x658, x655);
    let mut x669: u32 = 0;
    let mut x670: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x669, &mut x670, x668, x656, x653);
    let mut x671: u32 = 0;
    let mut x672: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x671, &mut x672, x670, x654, x651);
    let mut x673: u32 = 0;
    let mut x674: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x673, &mut x674, x672, x652, x649);
    let mut x675: u32 = 0;
    let mut x676: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x675, &mut x676, x674, x650, x647);
    let x677: u32 = ((x676 as u32) + x648);
    let mut x678: u32 = 0;
    let mut x679: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x678, &mut x679, 0x0, x627, x661);
    let mut x680: u32 = 0;
    let mut x681: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x680, &mut x681, x679, x629, x663);
    let mut x682: u32 = 0;
    let mut x683: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x682, &mut x683, x681, x631, x665);
    let mut x684: u32 = 0;
    let mut x685: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x684, &mut x685, x683, x633, x667);
    let mut x686: u32 = 0;
    let mut x687: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x686, &mut x687, x685, x635, x669);
    let mut x688: u32 = 0;
    let mut x689: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x688, &mut x689, x687, x637, x671);
    let mut x690: u32 = 0;
    let mut x691: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x690, &mut x691, x689, x639, x673);
    let mut x692: u32 = 0;
    let mut x693: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x692, &mut x693, x691, x641, x675);
    let mut x694: u32 = 0;
    let mut x695: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x694, &mut x695, x693, x643, x677);
    let x696: u32 = ((x695 as u32) + (x644 as u32));
    let mut x697: u32 = 0;
    let mut x698: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x697, &mut x698, x7, (*IndexConst(arg2).index(7)));
    let mut x699: u32 = 0;
    let mut x700: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x699, &mut x700, x7, (*IndexConst(arg2).index(6)));
    let mut x701: u32 = 0;
    let mut x702: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x701, &mut x702, x7, (*IndexConst(arg2).index(5)));
    let mut x703: u32 = 0;
    let mut x704: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x703, &mut x704, x7, (*IndexConst(arg2).index(4)));
    let mut x705: u32 = 0;
    let mut x706: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x705, &mut x706, x7, (*IndexConst(arg2).index(3)));
    let mut x707: u32 = 0;
    let mut x708: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x707, &mut x708, x7, (*IndexConst(arg2).index(2)));
    let mut x709: u32 = 0;
    let mut x710: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x709, &mut x710, x7, (*IndexConst(arg2).index(1)));
    let mut x711: u32 = 0;
    let mut x712: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x711, &mut x712, x7, (*IndexConst(arg2).index(0)));
    let mut x713: u32 = 0;
    let mut x714: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x713, &mut x714, 0x0, x712, x709);
    let mut x715: u32 = 0;
    let mut x716: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x715, &mut x716, x714, x710, x707);
    let mut x717: u32 = 0;
    let mut x718: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x717, &mut x718, x716, x708, x705);
    let mut x719: u32 = 0;
    let mut x720: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x719, &mut x720, x718, x706, x703);
    let mut x721: u32 = 0;
    let mut x722: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x721, &mut x722, x720, x704, x701);
    let mut x723: u32 = 0;
    let mut x724: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x723, &mut x724, x722, x702, x699);
    let mut x725: u32 = 0;
    let mut x726: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x725, &mut x726, x724, x700, x697);
    let x727: u32 = ((x726 as u32) + x698);
    let mut x728: u32 = 0;
    let mut x729: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x728, &mut x729, 0x0, x680, x711);
    let mut x730: u32 = 0;
    let mut x731: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x730, &mut x731, x729, x682, x713);
    let mut x732: u32 = 0;
    let mut x733: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x732, &mut x733, x731, x684, x715);
    let mut x734: u32 = 0;
    let mut x735: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x734, &mut x735, x733, x686, x717);
    let mut x736: u32 = 0;
    let mut x737: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x736, &mut x737, x735, x688, x719);
    let mut x738: u32 = 0;
    let mut x739: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x738, &mut x739, x737, x690, x721);
    let mut x740: u32 = 0;
    let mut x741: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x740, &mut x741, x739, x692, x723);
    let mut x742: u32 = 0;
    let mut x743: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x742, &mut x743, x741, x694, x725);
    let mut x744: u32 = 0;
    let mut x745: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x744, &mut x745, x743, x696, x727);
    let mut x746: u32 = 0;
    let mut x747: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x746, &mut x747, x728, 0xea53fa95);
    let mut x748: u32 = 0;
    let mut x749: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x748, &mut x749, x746, 0xffffffff);
    let mut x750: u32 = 0;
    let mut x751: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x750, &mut x751, x746, 0xffffffff);
    let mut x752: u32 = 0;
    let mut x753: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x752, &mut x753, x746, 0xffffffff);
    let mut x754: u32 = 0;
    let mut x755: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x754, &mut x755, x746, 0xffffffff);
    let mut x756: u32 = 0;
    let mut x757: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x756, &mut x757, x746, 0xffffffff);
    let mut x758: u32 = 0;
    let mut x759: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x758, &mut x759, x746, 0xffffffff);
    let mut x760: u32 = 0;
    let mut x761: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x760, &mut x761, x746, 0xffffffff);
    let mut x762: u32 = 0;
    let mut x763: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x762, &mut x763, x746, 0xffffff43);
    let mut x764: u32 = 0;
    let mut x765: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x764, &mut x765, 0x0, x763, x760);
    let mut x766: u32 = 0;
    let mut x767: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x766, &mut x767, x765, x761, x758);
    let mut x768: u32 = 0;
    let mut x769: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x768, &mut x769, x767, x759, x756);
    let mut x770: u32 = 0;
    let mut x771: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x770, &mut x771, x769, x757, x754);
    let mut x772: u32 = 0;
    let mut x773: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x772, &mut x773, x771, x755, x752);
    let mut x774: u32 = 0;
    let mut x775: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x774, &mut x775, x773, x753, x750);
    let mut x776: u32 = 0;
    let mut x777: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x776, &mut x777, x775, x751, x748);
    let x778: u32 = ((x777 as u32) + x749);
    let mut x779: u32 = 0;
    let mut x780: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x779, &mut x780, 0x0, x728, x762);
    let mut x781: u32 = 0;
    let mut x782: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x781, &mut x782, x780, x730, x764);
    let mut x783: u32 = 0;
    let mut x784: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x783, &mut x784, x782, x732, x766);
    let mut x785: u32 = 0;
    let mut x786: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x785, &mut x786, x784, x734, x768);
    let mut x787: u32 = 0;
    let mut x788: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x787, &mut x788, x786, x736, x770);
    let mut x789: u32 = 0;
    let mut x790: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x789, &mut x790, x788, x738, x772);
    let mut x791: u32 = 0;
    let mut x792: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x791, &mut x792, x790, x740, x774);
    let mut x793: u32 = 0;
    let mut x794: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x793, &mut x794, x792, x742, x776);
    let mut x795: u32 = 0;
    let mut x796: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x795, &mut x796, x794, x744, x778);
    let x797: u32 = ((x796 as u32) + (x745 as u32));
    let mut x798: u32 = 0;
    let mut x799: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x798, &mut x799, 0x0, x781, 0xffffff43);
    let mut x800: u32 = 0;
    let mut x801: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x800, &mut x801, x799, x783, 0xffffffff);
    let mut x802: u32 = 0;
    let mut x803: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x802, &mut x803, x801, x785, 0xffffffff);
    let mut x804: u32 = 0;
    let mut x805: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x804, &mut x805, x803, x787, 0xffffffff);
    let mut x806: u32 = 0;
    let mut x807: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x806, &mut x807, x805, x789, 0xffffffff);
    let mut x808: u32 = 0;
    let mut x809: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x808, &mut x809, x807, x791, 0xffffffff);
    let mut x810: u32 = 0;
    let mut x811: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x810, &mut x811, x809, x793, 0xffffffff);
    let mut x812: u32 = 0;
    let mut x813: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x812, &mut x813, x811, x795, 0xffffffff);
    let mut x814: u32 = 0;
    let mut x815: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x814, &mut x815, x813, x797, (0x0 as u32));
    let mut x816: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x816, x815, x798, x781);
    let mut x817: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x817, x815, x800, x783);
    let mut x818: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x818, x815, x802, x785);
    let mut x819: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x819, x815, x804, x787);
    let mut x820: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x820, x815, x806, x789);
    let mut x821: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x821, x815, x808, x791);
    let mut x822: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x822, x815, x810, x793);
    let mut x823: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x823, x815, x812, x795);
    *IndexConst(&mut out1).index_mut(0) = x816;
    *IndexConst(&mut out1).index_mut(1) = x817;
    *IndexConst(&mut out1).index_mut(2) = x818;
    *IndexConst(&mut out1).index_mut(3) = x819;
    *IndexConst(&mut out1).index_mut(4) = x820;
    *IndexConst(&mut out1).index_mut(5) = x821;
    *IndexConst(&mut out1).index_mut(6) = x822;
    *IndexConst(&mut out1).index_mut(7) = x823;
}

/// The function fiat_bignp256_square squares a field element in the Montgomery domain.
///
/// Preconditions:
///   0 ≤ eval arg1 < m
/// Postconditions:
///   eval (from_montgomery out1) mod m = (eval (from_montgomery arg1) * eval (from_montgomery arg1)) mod m
///   0 ≤ eval out1 < m
///
#[inline]
pub const fn fiat_bignp256_square(
    mut out1: &mut fiat_bignp256_montgomery_domain_field_element,
    arg1: &fiat_bignp256_montgomery_domain_field_element,
) {
    let x1: u32 = (*IndexConst(arg1).index(1));
    let x2: u32 = (*IndexConst(arg1).index(2));
    let x3: u32 = (*IndexConst(arg1).index(3));
    let x4: u32 = (*IndexConst(arg1).index(4));
    let x5: u32 = (*IndexConst(arg1).index(5));
    let x6: u32 = (*IndexConst(arg1).index(6));
    let x7: u32 = (*IndexConst(arg1).index(7));
    let x8: u32 = (*IndexConst(arg1).index(0));
    let mut x9: u32 = 0;
    let mut x10: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x9, &mut x10, x8, (*IndexConst(arg1).index(7)));
    let mut x11: u32 = 0;
    let mut x12: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x11, &mut x12, x8, (*IndexConst(arg1).index(6)));
    let mut x13: u32 = 0;
    let mut x14: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x13, &mut x14, x8, (*IndexConst(arg1).index(5)));
    let mut x15: u32 = 0;
    let mut x16: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x15, &mut x16, x8, (*IndexConst(arg1).index(4)));
    let mut x17: u32 = 0;
    let mut x18: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x17, &mut x18, x8, (*IndexConst(arg1).index(3)));
    let mut x19: u32 = 0;
    let mut x20: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x19, &mut x20, x8, (*IndexConst(arg1).index(2)));
    let mut x21: u32 = 0;
    let mut x22: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x21, &mut x22, x8, (*IndexConst(arg1).index(1)));
    let mut x23: u32 = 0;
    let mut x24: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x23, &mut x24, x8, (*IndexConst(arg1).index(0)));
    let mut x25: u32 = 0;
    let mut x26: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x25, &mut x26, 0x0, x24, x21);
    let mut x27: u32 = 0;
    let mut x28: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x27, &mut x28, x26, x22, x19);
    let mut x29: u32 = 0;
    let mut x30: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x29, &mut x30, x28, x20, x17);
    let mut x31: u32 = 0;
    let mut x32: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x31, &mut x32, x30, x18, x15);
    let mut x33: u32 = 0;
    let mut x34: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x33, &mut x34, x32, x16, x13);
    let mut x35: u32 = 0;
    let mut x36: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x35, &mut x36, x34, x14, x11);
    let mut x37: u32 = 0;
    let mut x38: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x37, &mut x38, x36, x12, x9);
    let x39: u32 = ((x38 as u32) + x10);
    let mut x40: u32 = 0;
    let mut x41: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x40, &mut x41, x23, 0xea53fa95);
    let mut x42: u32 = 0;
    let mut x43: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x42, &mut x43, x40, 0xffffffff);
    let mut x44: u32 = 0;
    let mut x45: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x44, &mut x45, x40, 0xffffffff);
    let mut x46: u32 = 0;
    let mut x47: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x46, &mut x47, x40, 0xffffffff);
    let mut x48: u32 = 0;
    let mut x49: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x48, &mut x49, x40, 0xffffffff);
    let mut x50: u32 = 0;
    let mut x51: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x50, &mut x51, x40, 0xffffffff);
    let mut x52: u32 = 0;
    let mut x53: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x52, &mut x53, x40, 0xffffffff);
    let mut x54: u32 = 0;
    let mut x55: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x54, &mut x55, x40, 0xffffffff);
    let mut x56: u32 = 0;
    let mut x57: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x56, &mut x57, x40, 0xffffff43);
    let mut x58: u32 = 0;
    let mut x59: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x58, &mut x59, 0x0, x57, x54);
    let mut x60: u32 = 0;
    let mut x61: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x60, &mut x61, x59, x55, x52);
    let mut x62: u32 = 0;
    let mut x63: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x62, &mut x63, x61, x53, x50);
    let mut x64: u32 = 0;
    let mut x65: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x64, &mut x65, x63, x51, x48);
    let mut x66: u32 = 0;
    let mut x67: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x66, &mut x67, x65, x49, x46);
    let mut x68: u32 = 0;
    let mut x69: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x68, &mut x69, x67, x47, x44);
    let mut x70: u32 = 0;
    let mut x71: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x70, &mut x71, x69, x45, x42);
    let x72: u32 = ((x71 as u32) + x43);
    let mut x73: u32 = 0;
    let mut x74: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x73, &mut x74, 0x0, x23, x56);
    let mut x75: u32 = 0;
    let mut x76: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x75, &mut x76, x74, x25, x58);
    let mut x77: u32 = 0;
    let mut x78: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x77, &mut x78, x76, x27, x60);
    let mut x79: u32 = 0;
    let mut x80: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x79, &mut x80, x78, x29, x62);
    let mut x81: u32 = 0;
    let mut x82: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x81, &mut x82, x80, x31, x64);
    let mut x83: u32 = 0;
    let mut x84: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x83, &mut x84, x82, x33, x66);
    let mut x85: u32 = 0;
    let mut x86: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x85, &mut x86, x84, x35, x68);
    let mut x87: u32 = 0;
    let mut x88: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x87, &mut x88, x86, x37, x70);
    let mut x89: u32 = 0;
    let mut x90: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x89, &mut x90, x88, x39, x72);
    let mut x91: u32 = 0;
    let mut x92: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x91, &mut x92, x1, (*IndexConst(arg1).index(7)));
    let mut x93: u32 = 0;
    let mut x94: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x93, &mut x94, x1, (*IndexConst(arg1).index(6)));
    let mut x95: u32 = 0;
    let mut x96: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x95, &mut x96, x1, (*IndexConst(arg1).index(5)));
    let mut x97: u32 = 0;
    let mut x98: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x97, &mut x98, x1, (*IndexConst(arg1).index(4)));
    let mut x99: u32 = 0;
    let mut x100: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x99, &mut x100, x1, (*IndexConst(arg1).index(3)));
    let mut x101: u32 = 0;
    let mut x102: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x101, &mut x102, x1, (*IndexConst(arg1).index(2)));
    let mut x103: u32 = 0;
    let mut x104: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x103, &mut x104, x1, (*IndexConst(arg1).index(1)));
    let mut x105: u32 = 0;
    let mut x106: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x105, &mut x106, x1, (*IndexConst(arg1).index(0)));
    let mut x107: u32 = 0;
    let mut x108: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x107, &mut x108, 0x0, x106, x103);
    let mut x109: u32 = 0;
    let mut x110: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x109, &mut x110, x108, x104, x101);
    let mut x111: u32 = 0;
    let mut x112: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x111, &mut x112, x110, x102, x99);
    let mut x113: u32 = 0;
    let mut x114: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x113, &mut x114, x112, x100, x97);
    let mut x115: u32 = 0;
    let mut x116: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x115, &mut x116, x114, x98, x95);
    let mut x117: u32 = 0;
    let mut x118: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x117, &mut x118, x116, x96, x93);
    let mut x119: u32 = 0;
    let mut x120: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x119, &mut x120, x118, x94, x91);
    let x121: u32 = ((x120 as u32) + x92);
    let mut x122: u32 = 0;
    let mut x123: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x122, &mut x123, 0x0, x75, x105);
    let mut x124: u32 = 0;
    let mut x125: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x124, &mut x125, x123, x77, x107);
    let mut x126: u32 = 0;
    let mut x127: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x126, &mut x127, x125, x79, x109);
    let mut x128: u32 = 0;
    let mut x129: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x128, &mut x129, x127, x81, x111);
    let mut x130: u32 = 0;
    let mut x131: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x130, &mut x131, x129, x83, x113);
    let mut x132: u32 = 0;
    let mut x133: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x132, &mut x133, x131, x85, x115);
    let mut x134: u32 = 0;
    let mut x135: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x134, &mut x135, x133, x87, x117);
    let mut x136: u32 = 0;
    let mut x137: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x136, &mut x137, x135, x89, x119);
    let mut x138: u32 = 0;
    let mut x139: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x138, &mut x139, x137, (x90 as u32), x121);
    let mut x140: u32 = 0;
    let mut x141: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x140, &mut x141, x122, 0xea53fa95);
    let mut x142: u32 = 0;
    let mut x143: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x142, &mut x143, x140, 0xffffffff);
    let mut x144: u32 = 0;
    let mut x145: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x144, &mut x145, x140, 0xffffffff);
    let mut x146: u32 = 0;
    let mut x147: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x146, &mut x147, x140, 0xffffffff);
    let mut x148: u32 = 0;
    let mut x149: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x148, &mut x149, x140, 0xffffffff);
    let mut x150: u32 = 0;
    let mut x151: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x150, &mut x151, x140, 0xffffffff);
    let mut x152: u32 = 0;
    let mut x153: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x152, &mut x153, x140, 0xffffffff);
    let mut x154: u32 = 0;
    let mut x155: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x154, &mut x155, x140, 0xffffffff);
    let mut x156: u32 = 0;
    let mut x157: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x156, &mut x157, x140, 0xffffff43);
    let mut x158: u32 = 0;
    let mut x159: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x158, &mut x159, 0x0, x157, x154);
    let mut x160: u32 = 0;
    let mut x161: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x160, &mut x161, x159, x155, x152);
    let mut x162: u32 = 0;
    let mut x163: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x162, &mut x163, x161, x153, x150);
    let mut x164: u32 = 0;
    let mut x165: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x164, &mut x165, x163, x151, x148);
    let mut x166: u32 = 0;
    let mut x167: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x166, &mut x167, x165, x149, x146);
    let mut x168: u32 = 0;
    let mut x169: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x168, &mut x169, x167, x147, x144);
    let mut x170: u32 = 0;
    let mut x171: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x170, &mut x171, x169, x145, x142);
    let x172: u32 = ((x171 as u32) + x143);
    let mut x173: u32 = 0;
    let mut x174: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x173, &mut x174, 0x0, x122, x156);
    let mut x175: u32 = 0;
    let mut x176: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x175, &mut x176, x174, x124, x158);
    let mut x177: u32 = 0;
    let mut x178: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x177, &mut x178, x176, x126, x160);
    let mut x179: u32 = 0;
    let mut x180: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x179, &mut x180, x178, x128, x162);
    let mut x181: u32 = 0;
    let mut x182: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x181, &mut x182, x180, x130, x164);
    let mut x183: u32 = 0;
    let mut x184: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x183, &mut x184, x182, x132, x166);
    let mut x185: u32 = 0;
    let mut x186: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x185, &mut x186, x184, x134, x168);
    let mut x187: u32 = 0;
    let mut x188: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x187, &mut x188, x186, x136, x170);
    let mut x189: u32 = 0;
    let mut x190: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x189, &mut x190, x188, x138, x172);
    let x191: u32 = ((x190 as u32) + (x139 as u32));
    let mut x192: u32 = 0;
    let mut x193: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x192, &mut x193, x2, (*IndexConst(arg1).index(7)));
    let mut x194: u32 = 0;
    let mut x195: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x194, &mut x195, x2, (*IndexConst(arg1).index(6)));
    let mut x196: u32 = 0;
    let mut x197: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x196, &mut x197, x2, (*IndexConst(arg1).index(5)));
    let mut x198: u32 = 0;
    let mut x199: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x198, &mut x199, x2, (*IndexConst(arg1).index(4)));
    let mut x200: u32 = 0;
    let mut x201: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x200, &mut x201, x2, (*IndexConst(arg1).index(3)));
    let mut x202: u32 = 0;
    let mut x203: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x202, &mut x203, x2, (*IndexConst(arg1).index(2)));
    let mut x204: u32 = 0;
    let mut x205: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x204, &mut x205, x2, (*IndexConst(arg1).index(1)));
    let mut x206: u32 = 0;
    let mut x207: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x206, &mut x207, x2, (*IndexConst(arg1).index(0)));
    let mut x208: u32 = 0;
    let mut x209: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x208, &mut x209, 0x0, x207, x204);
    let mut x210: u32 = 0;
    let mut x211: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x210, &mut x211, x209, x205, x202);
    let mut x212: u32 = 0;
    let mut x213: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x212, &mut x213, x211, x203, x200);
    let mut x214: u32 = 0;
    let mut x215: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x214, &mut x215, x213, x201, x198);
    let mut x216: u32 = 0;
    let mut x217: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x216, &mut x217, x215, x199, x196);
    let mut x218: u32 = 0;
    let mut x219: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x218, &mut x219, x217, x197, x194);
    let mut x220: u32 = 0;
    let mut x221: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x220, &mut x221, x219, x195, x192);
    let x222: u32 = ((x221 as u32) + x193);
    let mut x223: u32 = 0;
    let mut x224: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x223, &mut x224, 0x0, x175, x206);
    let mut x225: u32 = 0;
    let mut x226: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x225, &mut x226, x224, x177, x208);
    let mut x227: u32 = 0;
    let mut x228: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x227, &mut x228, x226, x179, x210);
    let mut x229: u32 = 0;
    let mut x230: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x229, &mut x230, x228, x181, x212);
    let mut x231: u32 = 0;
    let mut x232: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x231, &mut x232, x230, x183, x214);
    let mut x233: u32 = 0;
    let mut x234: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x233, &mut x234, x232, x185, x216);
    let mut x235: u32 = 0;
    let mut x236: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x235, &mut x236, x234, x187, x218);
    let mut x237: u32 = 0;
    let mut x238: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x237, &mut x238, x236, x189, x220);
    let mut x239: u32 = 0;
    let mut x240: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x239, &mut x240, x238, x191, x222);
    let mut x241: u32 = 0;
    let mut x242: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x241, &mut x242, x223, 0xea53fa95);
    let mut x243: u32 = 0;
    let mut x244: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x243, &mut x244, x241, 0xffffffff);
    let mut x245: u32 = 0;
    let mut x246: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x245, &mut x246, x241, 0xffffffff);
    let mut x247: u32 = 0;
    let mut x248: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x247, &mut x248, x241, 0xffffffff);
    let mut x249: u32 = 0;
    let mut x250: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x249, &mut x250, x241, 0xffffffff);
    let mut x251: u32 = 0;
    let mut x252: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x251, &mut x252, x241, 0xffffffff);
    let mut x253: u32 = 0;
    let mut x254: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x253, &mut x254, x241, 0xffffffff);
    let mut x255: u32 = 0;
    let mut x256: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x255, &mut x256, x241, 0xffffffff);
    let mut x257: u32 = 0;
    let mut x258: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x257, &mut x258, x241, 0xffffff43);
    let mut x259: u32 = 0;
    let mut x260: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x259, &mut x260, 0x0, x258, x255);
    let mut x261: u32 = 0;
    let mut x262: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x261, &mut x262, x260, x256, x253);
    let mut x263: u32 = 0;
    let mut x264: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x263, &mut x264, x262, x254, x251);
    let mut x265: u32 = 0;
    let mut x266: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x265, &mut x266, x264, x252, x249);
    let mut x267: u32 = 0;
    let mut x268: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x267, &mut x268, x266, x250, x247);
    let mut x269: u32 = 0;
    let mut x270: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x269, &mut x270, x268, x248, x245);
    let mut x271: u32 = 0;
    let mut x272: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x271, &mut x272, x270, x246, x243);
    let x273: u32 = ((x272 as u32) + x244);
    let mut x274: u32 = 0;
    let mut x275: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x274, &mut x275, 0x0, x223, x257);
    let mut x276: u32 = 0;
    let mut x277: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x276, &mut x277, x275, x225, x259);
    let mut x278: u32 = 0;
    let mut x279: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x278, &mut x279, x277, x227, x261);
    let mut x280: u32 = 0;
    let mut x281: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x280, &mut x281, x279, x229, x263);
    let mut x282: u32 = 0;
    let mut x283: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x282, &mut x283, x281, x231, x265);
    let mut x284: u32 = 0;
    let mut x285: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x284, &mut x285, x283, x233, x267);
    let mut x286: u32 = 0;
    let mut x287: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x286, &mut x287, x285, x235, x269);
    let mut x288: u32 = 0;
    let mut x289: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x288, &mut x289, x287, x237, x271);
    let mut x290: u32 = 0;
    let mut x291: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x290, &mut x291, x289, x239, x273);
    let x292: u32 = ((x291 as u32) + (x240 as u32));
    let mut x293: u32 = 0;
    let mut x294: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x293, &mut x294, x3, (*IndexConst(arg1).index(7)));
    let mut x295: u32 = 0;
    let mut x296: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x295, &mut x296, x3, (*IndexConst(arg1).index(6)));
    let mut x297: u32 = 0;
    let mut x298: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x297, &mut x298, x3, (*IndexConst(arg1).index(5)));
    let mut x299: u32 = 0;
    let mut x300: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x299, &mut x300, x3, (*IndexConst(arg1).index(4)));
    let mut x301: u32 = 0;
    let mut x302: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x301, &mut x302, x3, (*IndexConst(arg1).index(3)));
    let mut x303: u32 = 0;
    let mut x304: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x303, &mut x304, x3, (*IndexConst(arg1).index(2)));
    let mut x305: u32 = 0;
    let mut x306: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x305, &mut x306, x3, (*IndexConst(arg1).index(1)));
    let mut x307: u32 = 0;
    let mut x308: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x307, &mut x308, x3, (*IndexConst(arg1).index(0)));
    let mut x309: u32 = 0;
    let mut x310: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x309, &mut x310, 0x0, x308, x305);
    let mut x311: u32 = 0;
    let mut x312: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x311, &mut x312, x310, x306, x303);
    let mut x313: u32 = 0;
    let mut x314: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x313, &mut x314, x312, x304, x301);
    let mut x315: u32 = 0;
    let mut x316: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x315, &mut x316, x314, x302, x299);
    let mut x317: u32 = 0;
    let mut x318: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x317, &mut x318, x316, x300, x297);
    let mut x319: u32 = 0;
    let mut x320: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x319, &mut x320, x318, x298, x295);
    let mut x321: u32 = 0;
    let mut x322: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x321, &mut x322, x320, x296, x293);
    let x323: u32 = ((x322 as u32) + x294);
    let mut x324: u32 = 0;
    let mut x325: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x324, &mut x325, 0x0, x276, x307);
    let mut x326: u32 = 0;
    let mut x327: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x326, &mut x327, x325, x278, x309);
    let mut x328: u32 = 0;
    let mut x329: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x328, &mut x329, x327, x280, x311);
    let mut x330: u32 = 0;
    let mut x331: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x330, &mut x331, x329, x282, x313);
    let mut x332: u32 = 0;
    let mut x333: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x332, &mut x333, x331, x284, x315);
    let mut x334: u32 = 0;
    let mut x335: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x334, &mut x335, x333, x286, x317);
    let mut x336: u32 = 0;
    let mut x337: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x336, &mut x337, x335, x288, x319);
    let mut x338: u32 = 0;
    let mut x339: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x338, &mut x339, x337, x290, x321);
    let mut x340: u32 = 0;
    let mut x341: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x340, &mut x341, x339, x292, x323);
    let mut x342: u32 = 0;
    let mut x343: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x342, &mut x343, x324, 0xea53fa95);
    let mut x344: u32 = 0;
    let mut x345: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x344, &mut x345, x342, 0xffffffff);
    let mut x346: u32 = 0;
    let mut x347: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x346, &mut x347, x342, 0xffffffff);
    let mut x348: u32 = 0;
    let mut x349: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x348, &mut x349, x342, 0xffffffff);
    let mut x350: u32 = 0;
    let mut x351: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x350, &mut x351, x342, 0xffffffff);
    let mut x352: u32 = 0;
    let mut x353: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x352, &mut x353, x342, 0xffffffff);
    let mut x354: u32 = 0;
    let mut x355: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x354, &mut x355, x342, 0xffffffff);
    let mut x356: u32 = 0;
    let mut x357: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x356, &mut x357, x342, 0xffffffff);
    let mut x358: u32 = 0;
    let mut x359: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x358, &mut x359, x342, 0xffffff43);
    let mut x360: u32 = 0;
    let mut x361: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x360, &mut x361, 0x0, x359, x356);
    let mut x362: u32 = 0;
    let mut x363: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x362, &mut x363, x361, x357, x354);
    let mut x364: u32 = 0;
    let mut x365: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x364, &mut x365, x363, x355, x352);
    let mut x366: u32 = 0;
    let mut x367: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x366, &mut x367, x365, x353, x350);
    let mut x368: u32 = 0;
    let mut x369: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x368, &mut x369, x367, x351, x348);
    let mut x370: u32 = 0;
    let mut x371: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x370, &mut x371, x369, x349, x346);
    let mut x372: u32 = 0;
    let mut x373: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x372, &mut x373, x371, x347, x344);
    let x374: u32 = ((x373 as u32) + x345);
    let mut x375: u32 = 0;
    let mut x376: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x375, &mut x376, 0x0, x324, x358);
    let mut x377: u32 = 0;
    let mut x378: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x377, &mut x378, x376, x326, x360);
    let mut x379: u32 = 0;
    let mut x380: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x379, &mut x380, x378, x328, x362);
    let mut x381: u32 = 0;
    let mut x382: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x381, &mut x382, x380, x330, x364);
    let mut x383: u32 = 0;
    let mut x384: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x383, &mut x384, x382, x332, x366);
    let mut x385: u32 = 0;
    let mut x386: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x385, &mut x386, x384, x334, x368);
    let mut x387: u32 = 0;
    let mut x388: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x387, &mut x388, x386, x336, x370);
    let mut x389: u32 = 0;
    let mut x390: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x389, &mut x390, x388, x338, x372);
    let mut x391: u32 = 0;
    let mut x392: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x391, &mut x392, x390, x340, x374);
    let x393: u32 = ((x392 as u32) + (x341 as u32));
    let mut x394: u32 = 0;
    let mut x395: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x394, &mut x395, x4, (*IndexConst(arg1).index(7)));
    let mut x396: u32 = 0;
    let mut x397: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x396, &mut x397, x4, (*IndexConst(arg1).index(6)));
    let mut x398: u32 = 0;
    let mut x399: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x398, &mut x399, x4, (*IndexConst(arg1).index(5)));
    let mut x400: u32 = 0;
    let mut x401: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x400, &mut x401, x4, (*IndexConst(arg1).index(4)));
    let mut x402: u32 = 0;
    let mut x403: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x402, &mut x403, x4, (*IndexConst(arg1).index(3)));
    let mut x404: u32 = 0;
    let mut x405: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x404, &mut x405, x4, (*IndexConst(arg1).index(2)));
    let mut x406: u32 = 0;
    let mut x407: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x406, &mut x407, x4, (*IndexConst(arg1).index(1)));
    let mut x408: u32 = 0;
    let mut x409: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x408, &mut x409, x4, (*IndexConst(arg1).index(0)));
    let mut x410: u32 = 0;
    let mut x411: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x410, &mut x411, 0x0, x409, x406);
    let mut x412: u32 = 0;
    let mut x413: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x412, &mut x413, x411, x407, x404);
    let mut x414: u32 = 0;
    let mut x415: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x414, &mut x415, x413, x405, x402);
    let mut x416: u32 = 0;
    let mut x417: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x416, &mut x417, x415, x403, x400);
    let mut x418: u32 = 0;
    let mut x419: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x418, &mut x419, x417, x401, x398);
    let mut x420: u32 = 0;
    let mut x421: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x420, &mut x421, x419, x399, x396);
    let mut x422: u32 = 0;
    let mut x423: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x422, &mut x423, x421, x397, x394);
    let x424: u32 = ((x423 as u32) + x395);
    let mut x425: u32 = 0;
    let mut x426: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x425, &mut x426, 0x0, x377, x408);
    let mut x427: u32 = 0;
    let mut x428: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x427, &mut x428, x426, x379, x410);
    let mut x429: u32 = 0;
    let mut x430: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x429, &mut x430, x428, x381, x412);
    let mut x431: u32 = 0;
    let mut x432: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x431, &mut x432, x430, x383, x414);
    let mut x433: u32 = 0;
    let mut x434: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x433, &mut x434, x432, x385, x416);
    let mut x435: u32 = 0;
    let mut x436: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x435, &mut x436, x434, x387, x418);
    let mut x437: u32 = 0;
    let mut x438: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x437, &mut x438, x436, x389, x420);
    let mut x439: u32 = 0;
    let mut x440: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x439, &mut x440, x438, x391, x422);
    let mut x441: u32 = 0;
    let mut x442: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x441, &mut x442, x440, x393, x424);
    let mut x443: u32 = 0;
    let mut x444: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x443, &mut x444, x425, 0xea53fa95);
    let mut x445: u32 = 0;
    let mut x446: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x445, &mut x446, x443, 0xffffffff);
    let mut x447: u32 = 0;
    let mut x448: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x447, &mut x448, x443, 0xffffffff);
    let mut x449: u32 = 0;
    let mut x450: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x449, &mut x450, x443, 0xffffffff);
    let mut x451: u32 = 0;
    let mut x452: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x451, &mut x452, x443, 0xffffffff);
    let mut x453: u32 = 0;
    let mut x454: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x453, &mut x454, x443, 0xffffffff);
    let mut x455: u32 = 0;
    let mut x456: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x455, &mut x456, x443, 0xffffffff);
    let mut x457: u32 = 0;
    let mut x458: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x457, &mut x458, x443, 0xffffffff);
    let mut x459: u32 = 0;
    let mut x460: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x459, &mut x460, x443, 0xffffff43);
    let mut x461: u32 = 0;
    let mut x462: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x461, &mut x462, 0x0, x460, x457);
    let mut x463: u32 = 0;
    let mut x464: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x463, &mut x464, x462, x458, x455);
    let mut x465: u32 = 0;
    let mut x466: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x465, &mut x466, x464, x456, x453);
    let mut x467: u32 = 0;
    let mut x468: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x467, &mut x468, x466, x454, x451);
    let mut x469: u32 = 0;
    let mut x470: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x469, &mut x470, x468, x452, x449);
    let mut x471: u32 = 0;
    let mut x472: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x471, &mut x472, x470, x450, x447);
    let mut x473: u32 = 0;
    let mut x474: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x473, &mut x474, x472, x448, x445);
    let x475: u32 = ((x474 as u32) + x446);
    let mut x476: u32 = 0;
    let mut x477: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x476, &mut x477, 0x0, x425, x459);
    let mut x478: u32 = 0;
    let mut x479: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x478, &mut x479, x477, x427, x461);
    let mut x480: u32 = 0;
    let mut x481: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x480, &mut x481, x479, x429, x463);
    let mut x482: u32 = 0;
    let mut x483: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x482, &mut x483, x481, x431, x465);
    let mut x484: u32 = 0;
    let mut x485: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x484, &mut x485, x483, x433, x467);
    let mut x486: u32 = 0;
    let mut x487: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x486, &mut x487, x485, x435, x469);
    let mut x488: u32 = 0;
    let mut x489: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x488, &mut x489, x487, x437, x471);
    let mut x490: u32 = 0;
    let mut x491: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x490, &mut x491, x489, x439, x473);
    let mut x492: u32 = 0;
    let mut x493: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x492, &mut x493, x491, x441, x475);
    let x494: u32 = ((x493 as u32) + (x442 as u32));
    let mut x495: u32 = 0;
    let mut x496: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x495, &mut x496, x5, (*IndexConst(arg1).index(7)));
    let mut x497: u32 = 0;
    let mut x498: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x497, &mut x498, x5, (*IndexConst(arg1).index(6)));
    let mut x499: u32 = 0;
    let mut x500: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x499, &mut x500, x5, (*IndexConst(arg1).index(5)));
    let mut x501: u32 = 0;
    let mut x502: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x501, &mut x502, x5, (*IndexConst(arg1).index(4)));
    let mut x503: u32 = 0;
    let mut x504: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x503, &mut x504, x5, (*IndexConst(arg1).index(3)));
    let mut x505: u32 = 0;
    let mut x506: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x505, &mut x506, x5, (*IndexConst(arg1).index(2)));
    let mut x507: u32 = 0;
    let mut x508: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x507, &mut x508, x5, (*IndexConst(arg1).index(1)));
    let mut x509: u32 = 0;
    let mut x510: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x509, &mut x510, x5, (*IndexConst(arg1).index(0)));
    let mut x511: u32 = 0;
    let mut x512: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x511, &mut x512, 0x0, x510, x507);
    let mut x513: u32 = 0;
    let mut x514: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x513, &mut x514, x512, x508, x505);
    let mut x515: u32 = 0;
    let mut x516: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x515, &mut x516, x514, x506, x503);
    let mut x517: u32 = 0;
    let mut x518: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x517, &mut x518, x516, x504, x501);
    let mut x519: u32 = 0;
    let mut x520: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x519, &mut x520, x518, x502, x499);
    let mut x521: u32 = 0;
    let mut x522: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x521, &mut x522, x520, x500, x497);
    let mut x523: u32 = 0;
    let mut x524: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x523, &mut x524, x522, x498, x495);
    let x525: u32 = ((x524 as u32) + x496);
    let mut x526: u32 = 0;
    let mut x527: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x526, &mut x527, 0x0, x478, x509);
    let mut x528: u32 = 0;
    let mut x529: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x528, &mut x529, x527, x480, x511);
    let mut x530: u32 = 0;
    let mut x531: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x530, &mut x531, x529, x482, x513);
    let mut x532: u32 = 0;
    let mut x533: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x532, &mut x533, x531, x484, x515);
    let mut x534: u32 = 0;
    let mut x535: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x534, &mut x535, x533, x486, x517);
    let mut x536: u32 = 0;
    let mut x537: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x536, &mut x537, x535, x488, x519);
    let mut x538: u32 = 0;
    let mut x539: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x538, &mut x539, x537, x490, x521);
    let mut x540: u32 = 0;
    let mut x541: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x540, &mut x541, x539, x492, x523);
    let mut x542: u32 = 0;
    let mut x543: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x542, &mut x543, x541, x494, x525);
    let mut x544: u32 = 0;
    let mut x545: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x544, &mut x545, x526, 0xea53fa95);
    let mut x546: u32 = 0;
    let mut x547: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x546, &mut x547, x544, 0xffffffff);
    let mut x548: u32 = 0;
    let mut x549: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x548, &mut x549, x544, 0xffffffff);
    let mut x550: u32 = 0;
    let mut x551: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x550, &mut x551, x544, 0xffffffff);
    let mut x552: u32 = 0;
    let mut x553: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x552, &mut x553, x544, 0xffffffff);
    let mut x554: u32 = 0;
    let mut x555: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x554, &mut x555, x544, 0xffffffff);
    let mut x556: u32 = 0;
    let mut x557: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x556, &mut x557, x544, 0xffffffff);
    let mut x558: u32 = 0;
    let mut x559: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x558, &mut x559, x544, 0xffffffff);
    let mut x560: u32 = 0;
    let mut x561: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x560, &mut x561, x544, 0xffffff43);
    let mut x562: u32 = 0;
    let mut x563: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x562, &mut x563, 0x0, x561, x558);
    let mut x564: u32 = 0;
    let mut x565: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x564, &mut x565, x563, x559, x556);
    let mut x566: u32 = 0;
    let mut x567: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x566, &mut x567, x565, x557, x554);
    let mut x568: u32 = 0;
    let mut x569: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x568, &mut x569, x567, x555, x552);
    let mut x570: u32 = 0;
    let mut x571: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x570, &mut x571, x569, x553, x550);
    let mut x572: u32 = 0;
    let mut x573: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x572, &mut x573, x571, x551, x548);
    let mut x574: u32 = 0;
    let mut x575: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x574, &mut x575, x573, x549, x546);
    let x576: u32 = ((x575 as u32) + x547);
    let mut x577: u32 = 0;
    let mut x578: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x577, &mut x578, 0x0, x526, x560);
    let mut x579: u32 = 0;
    let mut x580: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x579, &mut x580, x578, x528, x562);
    let mut x581: u32 = 0;
    let mut x582: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x581, &mut x582, x580, x530, x564);
    let mut x583: u32 = 0;
    let mut x584: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x583, &mut x584, x582, x532, x566);
    let mut x585: u32 = 0;
    let mut x586: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x585, &mut x586, x584, x534, x568);
    let mut x587: u32 = 0;
    let mut x588: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x587, &mut x588, x586, x536, x570);
    let mut x589: u32 = 0;
    let mut x590: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x589, &mut x590, x588, x538, x572);
    let mut x591: u32 = 0;
    let mut x592: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x591, &mut x592, x590, x540, x574);
    let mut x593: u32 = 0;
    let mut x594: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x593, &mut x594, x592, x542, x576);
    let x595: u32 = ((x594 as u32) + (x543 as u32));
    let mut x596: u32 = 0;
    let mut x597: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x596, &mut x597, x6, (*IndexConst(arg1).index(7)));
    let mut x598: u32 = 0;
    let mut x599: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x598, &mut x599, x6, (*IndexConst(arg1).index(6)));
    let mut x600: u32 = 0;
    let mut x601: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x600, &mut x601, x6, (*IndexConst(arg1).index(5)));
    let mut x602: u32 = 0;
    let mut x603: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x602, &mut x603, x6, (*IndexConst(arg1).index(4)));
    let mut x604: u32 = 0;
    let mut x605: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x604, &mut x605, x6, (*IndexConst(arg1).index(3)));
    let mut x606: u32 = 0;
    let mut x607: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x606, &mut x607, x6, (*IndexConst(arg1).index(2)));
    let mut x608: u32 = 0;
    let mut x609: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x608, &mut x609, x6, (*IndexConst(arg1).index(1)));
    let mut x610: u32 = 0;
    let mut x611: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x610, &mut x611, x6, (*IndexConst(arg1).index(0)));
    let mut x612: u32 = 0;
    let mut x613: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x612, &mut x613, 0x0, x611, x608);
    let mut x614: u32 = 0;
    let mut x615: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x614, &mut x615, x613, x609, x606);
    let mut x616: u32 = 0;
    let mut x617: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x616, &mut x617, x615, x607, x604);
    let mut x618: u32 = 0;
    let mut x619: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x618, &mut x619, x617, x605, x602);
    let mut x620: u32 = 0;
    let mut x621: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x620, &mut x621, x619, x603, x600);
    let mut x622: u32 = 0;
    let mut x623: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x622, &mut x623, x621, x601, x598);
    let mut x624: u32 = 0;
    let mut x625: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x624, &mut x625, x623, x599, x596);
    let x626: u32 = ((x625 as u32) + x597);
    let mut x627: u32 = 0;
    let mut x628: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x627, &mut x628, 0x0, x579, x610);
    let mut x629: u32 = 0;
    let mut x630: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x629, &mut x630, x628, x581, x612);
    let mut x631: u32 = 0;
    let mut x632: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x631, &mut x632, x630, x583, x614);
    let mut x633: u32 = 0;
    let mut x634: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x633, &mut x634, x632, x585, x616);
    let mut x635: u32 = 0;
    let mut x636: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x635, &mut x636, x634, x587, x618);
    let mut x637: u32 = 0;
    let mut x638: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x637, &mut x638, x636, x589, x620);
    let mut x639: u32 = 0;
    let mut x640: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x639, &mut x640, x638, x591, x622);
    let mut x641: u32 = 0;
    let mut x642: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x641, &mut x642, x640, x593, x624);
    let mut x643: u32 = 0;
    let mut x644: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x643, &mut x644, x642, x595, x626);
    let mut x645: u32 = 0;
    let mut x646: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x645, &mut x646, x627, 0xea53fa95);
    let mut x647: u32 = 0;
    let mut x648: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x647, &mut x648, x645, 0xffffffff);
    let mut x649: u32 = 0;
    let mut x650: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x649, &mut x650, x645, 0xffffffff);
    let mut x651: u32 = 0;
    let mut x652: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x651, &mut x652, x645, 0xffffffff);
    let mut x653: u32 = 0;
    let mut x654: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x653, &mut x654, x645, 0xffffffff);
    let mut x655: u32 = 0;
    let mut x656: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x655, &mut x656, x645, 0xffffffff);
    let mut x657: u32 = 0;
    let mut x658: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x657, &mut x658, x645, 0xffffffff);
    let mut x659: u32 = 0;
    let mut x660: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x659, &mut x660, x645, 0xffffffff);
    let mut x661: u32 = 0;
    let mut x662: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x661, &mut x662, x645, 0xffffff43);
    let mut x663: u32 = 0;
    let mut x664: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x663, &mut x664, 0x0, x662, x659);
    let mut x665: u32 = 0;
    let mut x666: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x665, &mut x666, x664, x660, x657);
    let mut x667: u32 = 0;
    let mut x668: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x667, &mut x668, x666, x658, x655);
    let mut x669: u32 = 0;
    let mut x670: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x669, &mut x670, x668, x656, x653);
    let mut x671: u32 = 0;
    let mut x672: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x671, &mut x672, x670, x654, x651);
    let mut x673: u32 = 0;
    let mut x674: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x673, &mut x674, x672, x652, x649);
    let mut x675: u32 = 0;
    let mut x676: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x675, &mut x676, x674, x650, x647);
    let x677: u32 = ((x676 as u32) + x648);
    let mut x678: u32 = 0;
    let mut x679: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x678, &mut x679, 0x0, x627, x661);
    let mut x680: u32 = 0;
    let mut x681: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x680, &mut x681, x679, x629, x663);
    let mut x682: u32 = 0;
    let mut x683: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x682, &mut x683, x681, x631, x665);
    let mut x684: u32 = 0;
    let mut x685: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x684, &mut x685, x683, x633, x667);
    let mut x686: u32 = 0;
    let mut x687: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x686, &mut x687, x685, x635, x669);
    let mut x688: u32 = 0;
    let mut x689: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x688, &mut x689, x687, x637, x671);
    let mut x690: u32 = 0;
    let mut x691: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x690, &mut x691, x689, x639, x673);
    let mut x692: u32 = 0;
    let mut x693: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x692, &mut x693, x691, x641, x675);
    let mut x694: u32 = 0;
    let mut x695: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x694, &mut x695, x693, x643, x677);
    let x696: u32 = ((x695 as u32) + (x644 as u32));
    let mut x697: u32 = 0;
    let mut x698: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x697, &mut x698, x7, (*IndexConst(arg1).index(7)));
    let mut x699: u32 = 0;
    let mut x700: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x699, &mut x700, x7, (*IndexConst(arg1).index(6)));
    let mut x701: u32 = 0;
    let mut x702: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x701, &mut x702, x7, (*IndexConst(arg1).index(5)));
    let mut x703: u32 = 0;
    let mut x704: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x703, &mut x704, x7, (*IndexConst(arg1).index(4)));
    let mut x705: u32 = 0;
    let mut x706: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x705, &mut x706, x7, (*IndexConst(arg1).index(3)));
    let mut x707: u32 = 0;
    let mut x708: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x707, &mut x708, x7, (*IndexConst(arg1).index(2)));
    let mut x709: u32 = 0;
    let mut x710: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x709, &mut x710, x7, (*IndexConst(arg1).index(1)));
    let mut x711: u32 = 0;
    let mut x712: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x711, &mut x712, x7, (*IndexConst(arg1).index(0)));
    let mut x713: u32 = 0;
    let mut x714: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x713, &mut x714, 0x0, x712, x709);
    let mut x715: u32 = 0;
    let mut x716: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x715, &mut x716, x714, x710, x707);
    let mut x717: u32 = 0;
    let mut x718: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x717, &mut x718, x716, x708, x705);
    let mut x719: u32 = 0;
    let mut x720: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x719, &mut x720, x718, x706, x703);
    let mut x721: u32 = 0;
    let mut x722: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x721, &mut x722, x720, x704, x701);
    let mut x723: u32 = 0;
    let mut x724: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x723, &mut x724, x722, x702, x699);
    let mut x725: u32 = 0;
    let mut x726: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x725, &mut x726, x724, x700, x697);
    let x727: u32 = ((x726 as u32) + x698);
    let mut x728: u32 = 0;
    let mut x729: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x728, &mut x729, 0x0, x680, x711);
    let mut x730: u32 = 0;
    let mut x731: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x730, &mut x731, x729, x682, x713);
    let mut x732: u32 = 0;
    let mut x733: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x732, &mut x733, x731, x684, x715);
    let mut x734: u32 = 0;
    let mut x735: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x734, &mut x735, x733, x686, x717);
    let mut x736: u32 = 0;
    let mut x737: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x736, &mut x737, x735, x688, x719);
    let mut x738: u32 = 0;
    let mut x739: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x738, &mut x739, x737, x690, x721);
    let mut x740: u32 = 0;
    let mut x741: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x740, &mut x741, x739, x692, x723);
    let mut x742: u32 = 0;
    let mut x743: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x742, &mut x743, x741, x694, x725);
    let mut x744: u32 = 0;
    let mut x745: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x744, &mut x745, x743, x696, x727);
    let mut x746: u32 = 0;
    let mut x747: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x746, &mut x747, x728, 0xea53fa95);
    let mut x748: u32 = 0;
    let mut x749: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x748, &mut x749, x746, 0xffffffff);
    let mut x750: u32 = 0;
    let mut x751: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x750, &mut x751, x746, 0xffffffff);
    let mut x752: u32 = 0;
    let mut x753: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x752, &mut x753, x746, 0xffffffff);
    let mut x754: u32 = 0;
    let mut x755: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x754, &mut x755, x746, 0xffffffff);
    let mut x756: u32 = 0;
    let mut x757: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x756, &mut x757, x746, 0xffffffff);
    let mut x758: u32 = 0;
    let mut x759: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x758, &mut x759, x746, 0xffffffff);
    let mut x760: u32 = 0;
    let mut x761: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x760, &mut x761, x746, 0xffffffff);
    let mut x762: u32 = 0;
    let mut x763: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x762, &mut x763, x746, 0xffffff43);
    let mut x764: u32 = 0;
    let mut x765: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x764, &mut x765, 0x0, x763, x760);
    let mut x766: u32 = 0;
    let mut x767: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x766, &mut x767, x765, x761, x758);
    let mut x768: u32 = 0;
    let mut x769: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x768, &mut x769, x767, x759, x756);
    let mut x770: u32 = 0;
    let mut x771: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x770, &mut x771, x769, x757, x754);
    let mut x772: u32 = 0;
    let mut x773: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x772, &mut x773, x771, x755, x752);
    let mut x774: u32 = 0;
    let mut x775: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x774, &mut x775, x773, x753, x750);
    let mut x776: u32 = 0;
    let mut x777: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x776, &mut x777, x775, x751, x748);
    let x778: u32 = ((x777 as u32) + x749);
    let mut x779: u32 = 0;
    let mut x780: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x779, &mut x780, 0x0, x728, x762);
    let mut x781: u32 = 0;
    let mut x782: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x781, &mut x782, x780, x730, x764);
    let mut x783: u32 = 0;
    let mut x784: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x783, &mut x784, x782, x732, x766);
    let mut x785: u32 = 0;
    let mut x786: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x785, &mut x786, x784, x734, x768);
    let mut x787: u32 = 0;
    let mut x788: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x787, &mut x788, x786, x736, x770);
    let mut x789: u32 = 0;
    let mut x790: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x789, &mut x790, x788, x738, x772);
    let mut x791: u32 = 0;
    let mut x792: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x791, &mut x792, x790, x740, x774);
    let mut x793: u32 = 0;
    let mut x794: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x793, &mut x794, x792, x742, x776);
    let mut x795: u32 = 0;
    let mut x796: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x795, &mut x796, x794, x744, x778);
    let x797: u32 = ((x796 as u32) + (x745 as u32));
    let mut x798: u32 = 0;
    let mut x799: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x798, &mut x799, 0x0, x781, 0xffffff43);
    let mut x800: u32 = 0;
    let mut x801: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x800, &mut x801, x799, x783, 0xffffffff);
    let mut x802: u32 = 0;
    let mut x803: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x802, &mut x803, x801, x785, 0xffffffff);
    let mut x804: u32 = 0;
    let mut x805: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x804, &mut x805, x803, x787, 0xffffffff);
    let mut x806: u32 = 0;
    let mut x807: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x806, &mut x807, x805, x789, 0xffffffff);
    let mut x808: u32 = 0;
    let mut x809: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x808, &mut x809, x807, x791, 0xffffffff);
    let mut x810: u32 = 0;
    let mut x811: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x810, &mut x811, x809, x793, 0xffffffff);
    let mut x812: u32 = 0;
    let mut x813: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x812, &mut x813, x811, x795, 0xffffffff);
    let mut x814: u32 = 0;
    let mut x815: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x814, &mut x815, x813, x797, (0x0 as u32));
    let mut x816: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x816, x815, x798, x781);
    let mut x817: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x817, x815, x800, x783);
    let mut x818: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x818, x815, x802, x785);
    let mut x819: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x819, x815, x804, x787);
    let mut x820: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x820, x815, x806, x789);
    let mut x821: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x821, x815, x808, x791);
    let mut x822: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x822, x815, x810, x793);
    let mut x823: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x823, x815, x812, x795);
    *IndexConst(&mut out1).index_mut(0) = x816;
    *IndexConst(&mut out1).index_mut(1) = x817;
    *IndexConst(&mut out1).index_mut(2) = x818;
    *IndexConst(&mut out1).index_mut(3) = x819;
    *IndexConst(&mut out1).index_mut(4) = x820;
    *IndexConst(&mut out1).index_mut(5) = x821;
    *IndexConst(&mut out1).index_mut(6) = x822;
    *IndexConst(&mut out1).index_mut(7) = x823;
}

/// The function fiat_bignp256_add adds two field elements in the Montgomery domain.
///
/// Preconditions:
///   0 ≤ eval arg1 < m
///   0 ≤ eval arg2 < m
/// Postconditions:
///   eval (from_montgomery out1) mod m = (eval (from_montgomery arg1) + eval (from_montgomery arg2)) mod m
///   0 ≤ eval out1 < m
///
#[inline]
pub const fn fiat_bignp256_add(
    mut out1: &mut fiat_bignp256_montgomery_domain_field_element,
    arg1: &fiat_bignp256_montgomery_domain_field_element,
    arg2: &fiat_bignp256_montgomery_domain_field_element,
) {
    let mut x1: u32 = 0;
    let mut x2: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x1,
        &mut x2,
        0x0,
        (*IndexConst(arg1).index(0)),
        (*IndexConst(arg2).index(0)),
    );
    let mut x3: u32 = 0;
    let mut x4: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x3,
        &mut x4,
        x2,
        (*IndexConst(arg1).index(1)),
        (*IndexConst(arg2).index(1)),
    );
    let mut x5: u32 = 0;
    let mut x6: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x5,
        &mut x6,
        x4,
        (*IndexConst(arg1).index(2)),
        (*IndexConst(arg2).index(2)),
    );
    let mut x7: u32 = 0;
    let mut x8: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x7,
        &mut x8,
        x6,
        (*IndexConst(arg1).index(3)),
        (*IndexConst(arg2).index(3)),
    );
    let mut x9: u32 = 0;
    let mut x10: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x9,
        &mut x10,
        x8,
        (*IndexConst(arg1).index(4)),
        (*IndexConst(arg2).index(4)),
    );
    let mut x11: u32 = 0;
    let mut x12: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x11,
        &mut x12,
        x10,
        (*IndexConst(arg1).index(5)),
        (*IndexConst(arg2).index(5)),
    );
    let mut x13: u32 = 0;
    let mut x14: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x13,
        &mut x14,
        x12,
        (*IndexConst(arg1).index(6)),
        (*IndexConst(arg2).index(6)),
    );
    let mut x15: u32 = 0;
    let mut x16: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x15,
        &mut x16,
        x14,
        (*IndexConst(arg1).index(7)),
        (*IndexConst(arg2).index(7)),
    );
    let mut x17: u32 = 0;
    let mut x18: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x17, &mut x18, 0x0, x1, 0xffffff43);
    let mut x19: u32 = 0;
    let mut x20: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x19, &mut x20, x18, x3, 0xffffffff);
    let mut x21: u32 = 0;
    let mut x22: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x21, &mut x22, x20, x5, 0xffffffff);
    let mut x23: u32 = 0;
    let mut x24: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x23, &mut x24, x22, x7, 0xffffffff);
    let mut x25: u32 = 0;
    let mut x26: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x25, &mut x26, x24, x9, 0xffffffff);
    let mut x27: u32 = 0;
    let mut x28: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x27, &mut x28, x26, x11, 0xffffffff);
    let mut x29: u32 = 0;
    let mut x30: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x29, &mut x30, x28, x13, 0xffffffff);
    let mut x31: u32 = 0;
    let mut x32: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x31, &mut x32, x30, x15, 0xffffffff);
    let mut x33: u32 = 0;
    let mut x34: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x33, &mut x34, x32, (x16 as u32), (0x0 as u32));
    let mut x35: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x35, x34, x17, x1);
    let mut x36: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x36, x34, x19, x3);
    let mut x37: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x37, x34, x21, x5);
    let mut x38: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x38, x34, x23, x7);
    let mut x39: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x39, x34, x25, x9);
    let mut x40: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x40, x34, x27, x11);
    let mut x41: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x41, x34, x29, x13);
    let mut x42: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x42, x34, x31, x15);
    *IndexConst(&mut out1).index_mut(0) = x35;
    *IndexConst(&mut out1).index_mut(1) = x36;
    *IndexConst(&mut out1).index_mut(2) = x37;
    *IndexConst(&mut out1).index_mut(3) = x38;
    *IndexConst(&mut out1).index_mut(4) = x39;
    *IndexConst(&mut out1).index_mut(5) = x40;
    *IndexConst(&mut out1).index_mut(6) = x41;
    *IndexConst(&mut out1).index_mut(7) = x42;
}

/// The function fiat_bignp256_sub subtracts two field elements in the Montgomery domain.
///
/// Preconditions:
///   0 ≤ eval arg1 < m
///   0 ≤ eval arg2 < m
/// Postconditions:
///   eval (from_montgomery out1) mod m = (eval (from_montgomery arg1) - eval (from_montgomery arg2)) mod m
///   0 ≤ eval out1 < m
///
#[inline]
pub const fn fiat_bignp256_sub(
    mut out1: &mut fiat_bignp256_montgomery_domain_field_element,
    arg1: &fiat_bignp256_montgomery_domain_field_element,
    arg2: &fiat_bignp256_montgomery_domain_field_element,
) {
    let mut x1: u32 = 0;
    let mut x2: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x1,
        &mut x2,
        0x0,
        (*IndexConst(arg1).index(0)),
        (*IndexConst(arg2).index(0)),
    );
    let mut x3: u32 = 0;
    let mut x4: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x3,
        &mut x4,
        x2,
        (*IndexConst(arg1).index(1)),
        (*IndexConst(arg2).index(1)),
    );
    let mut x5: u32 = 0;
    let mut x6: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x5,
        &mut x6,
        x4,
        (*IndexConst(arg1).index(2)),
        (*IndexConst(arg2).index(2)),
    );
    let mut x7: u32 = 0;
    let mut x8: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x7,
        &mut x8,
        x6,
        (*IndexConst(arg1).index(3)),
        (*IndexConst(arg2).index(3)),
    );
    let mut x9: u32 = 0;
    let mut x10: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x9,
        &mut x10,
        x8,
        (*IndexConst(arg1).index(4)),
        (*IndexConst(arg2).index(4)),
    );
    let mut x11: u32 = 0;
    let mut x12: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x11,
        &mut x12,
        x10,
        (*IndexConst(arg1).index(5)),
        (*IndexConst(arg2).index(5)),
    );
    let mut x13: u32 = 0;
    let mut x14: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x13,
        &mut x14,
        x12,
        (*IndexConst(arg1).index(6)),
        (*IndexConst(arg2).index(6)),
    );
    let mut x15: u32 = 0;
    let mut x16: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x15,
        &mut x16,
        x14,
        (*IndexConst(arg1).index(7)),
        (*IndexConst(arg2).index(7)),
    );
    let mut x17: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x17, x16, (0x0 as u32), 0xffffffff);
    let mut x18: u32 = 0;
    let mut x19: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x18, &mut x19, 0x0, x1, (x17 & 0xffffff43));
    let mut x20: u32 = 0;
    let mut x21: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x20, &mut x21, x19, x3, x17);
    let mut x22: u32 = 0;
    let mut x23: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x22, &mut x23, x21, x5, x17);
    let mut x24: u32 = 0;
    let mut x25: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x24, &mut x25, x23, x7, x17);
    let mut x26: u32 = 0;
    let mut x27: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x26, &mut x27, x25, x9, x17);
    let mut x28: u32 = 0;
    let mut x29: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x28, &mut x29, x27, x11, x17);
    let mut x30: u32 = 0;
    let mut x31: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x30, &mut x31, x29, x13, x17);
    let mut x32: u32 = 0;
    let mut x33: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x32, &mut x33, x31, x15, x17);
    *IndexConst(&mut out1).index_mut(0) = x18;
    *IndexConst(&mut out1).index_mut(1) = x20;
    *IndexConst(&mut out1).index_mut(2) = x22;
    *IndexConst(&mut out1).index_mut(3) = x24;
    *IndexConst(&mut out1).index_mut(4) = x26;
    *IndexConst(&mut out1).index_mut(5) = x28;
    *IndexConst(&mut out1).index_mut(6) = x30;
    *IndexConst(&mut out1).index_mut(7) = x32;
}

/// The function fiat_bignp256_opp negates a field element in the Montgomery domain.
///
/// Preconditions:
///   0 ≤ eval arg1 < m
/// Postconditions:
///   eval (from_montgomery out1) mod m = -eval (from_montgomery arg1) mod m
///   0 ≤ eval out1 < m
///
#[inline]
pub const fn fiat_bignp256_opp(
    mut out1: &mut fiat_bignp256_montgomery_domain_field_element,
    arg1: &fiat_bignp256_montgomery_domain_field_element,
) {
    let mut x1: u32 = 0;
    let mut x2: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x1,
        &mut x2,
        0x0,
        (0x0 as u32),
        (*IndexConst(arg1).index(0)),
    );
    let mut x3: u32 = 0;
    let mut x4: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x3,
        &mut x4,
        x2,
        (0x0 as u32),
        (*IndexConst(arg1).index(1)),
    );
    let mut x5: u32 = 0;
    let mut x6: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x5,
        &mut x6,
        x4,
        (0x0 as u32),
        (*IndexConst(arg1).index(2)),
    );
    let mut x7: u32 = 0;
    let mut x8: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x7,
        &mut x8,
        x6,
        (0x0 as u32),
        (*IndexConst(arg1).index(3)),
    );
    let mut x9: u32 = 0;
    let mut x10: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x9,
        &mut x10,
        x8,
        (0x0 as u32),
        (*IndexConst(arg1).index(4)),
    );
    let mut x11: u32 = 0;
    let mut x12: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x11,
        &mut x12,
        x10,
        (0x0 as u32),
        (*IndexConst(arg1).index(5)),
    );
    let mut x13: u32 = 0;
    let mut x14: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x13,
        &mut x14,
        x12,
        (0x0 as u32),
        (*IndexConst(arg1).index(6)),
    );
    let mut x15: u32 = 0;
    let mut x16: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(
        &mut x15,
        &mut x16,
        x14,
        (0x0 as u32),
        (*IndexConst(arg1).index(7)),
    );
    let mut x17: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x17, x16, (0x0 as u32), 0xffffffff);
    let mut x18: u32 = 0;
    let mut x19: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x18, &mut x19, 0x0, x1, (x17 & 0xffffff43));
    let mut x20: u32 = 0;
    let mut x21: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x20, &mut x21, x19, x3, x17);
    let mut x22: u32 = 0;
    let mut x23: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x22, &mut x23, x21, x5, x17);
    let mut x24: u32 = 0;
    let mut x25: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x24, &mut x25, x23, x7, x17);
    let mut x26: u32 = 0;
    let mut x27: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x26, &mut x27, x25, x9, x17);
    let mut x28: u32 = 0;
    let mut x29: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x28, &mut x29, x27, x11, x17);
    let mut x30: u32 = 0;
    let mut x31: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x30, &mut x31, x29, x13, x17);
    let mut x32: u32 = 0;
    let mut x33: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x32, &mut x33, x31, x15, x17);
    *IndexConst(&mut out1).index_mut(0) = x18;
    *IndexConst(&mut out1).index_mut(1) = x20;
    *IndexConst(&mut out1).index_mut(2) = x22;
    *IndexConst(&mut out1).index_mut(3) = x24;
    *IndexConst(&mut out1).index_mut(4) = x26;
    *IndexConst(&mut out1).index_mut(5) = x28;
    *IndexConst(&mut out1).index_mut(6) = x30;
    *IndexConst(&mut out1).index_mut(7) = x32;
}

/// The function fiat_bignp256_from_montgomery translates a field element out of the Montgomery domain.
///
/// Preconditions:
///   0 ≤ eval arg1 < m
/// Postconditions:
///   eval out1 mod m = (eval arg1 * ((2^32)⁻¹ mod m)^8) mod m
///   0 ≤ eval out1 < m
///
#[inline]
pub const fn fiat_bignp256_from_montgomery(
    mut out1: &mut fiat_bignp256_non_montgomery_domain_field_element,
    arg1: &fiat_bignp256_montgomery_domain_field_element,
) {
    let x1: u32 = (*IndexConst(arg1).index(0));
    let mut x2: u32 = 0;
    let mut x3: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x2, &mut x3, x1, 0xea53fa95);
    let mut x4: u32 = 0;
    let mut x5: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x4, &mut x5, x2, 0xffffffff);
    let mut x6: u32 = 0;
    let mut x7: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x6, &mut x7, x2, 0xffffffff);
    let mut x8: u32 = 0;
    let mut x9: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x8, &mut x9, x2, 0xffffffff);
    let mut x10: u32 = 0;
    let mut x11: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x10, &mut x11, x2, 0xffffffff);
    let mut x12: u32 = 0;
    let mut x13: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x12, &mut x13, x2, 0xffffffff);
    let mut x14: u32 = 0;
    let mut x15: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x14, &mut x15, x2, 0xffffffff);
    let mut x16: u32 = 0;
    let mut x17: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x16, &mut x17, x2, 0xffffffff);
    let mut x18: u32 = 0;
    let mut x19: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x18, &mut x19, x2, 0xffffff43);
    let mut x20: u32 = 0;
    let mut x21: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x20, &mut x21, 0x0, x19, x16);
    let mut x22: u32 = 0;
    let mut x23: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x22, &mut x23, x21, x17, x14);
    let mut x24: u32 = 0;
    let mut x25: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x24, &mut x25, x23, x15, x12);
    let mut x26: u32 = 0;
    let mut x27: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x26, &mut x27, x25, x13, x10);
    let mut x28: u32 = 0;
    let mut x29: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x28, &mut x29, x27, x11, x8);
    let mut x30: u32 = 0;
    let mut x31: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x30, &mut x31, x29, x9, x6);
    let mut x32: u32 = 0;
    let mut x33: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x32, &mut x33, x31, x7, x4);
    let mut x34: u32 = 0;
    let mut x35: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x34, &mut x35, 0x0, x1, x18);
    let mut x36: u32 = 0;
    let mut x37: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x36, &mut x37, x35, (0x0 as u32), x20);
    let mut x38: u32 = 0;
    let mut x39: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x38, &mut x39, x37, (0x0 as u32), x22);
    let mut x40: u32 = 0;
    let mut x41: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x40, &mut x41, x39, (0x0 as u32), x24);
    let mut x42: u32 = 0;
    let mut x43: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x42, &mut x43, x41, (0x0 as u32), x26);
    let mut x44: u32 = 0;
    let mut x45: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x44, &mut x45, x43, (0x0 as u32), x28);
    let mut x46: u32 = 0;
    let mut x47: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x46, &mut x47, x45, (0x0 as u32), x30);
    let mut x48: u32 = 0;
    let mut x49: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x48, &mut x49, x47, (0x0 as u32), x32);
    let mut x50: u32 = 0;
    let mut x51: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x50, &mut x51, x49, (0x0 as u32), ((x33 as u32) + x5));
    let mut x52: u32 = 0;
    let mut x53: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x52, &mut x53, 0x0, x36, (*IndexConst(arg1).index(1)));
    let mut x54: u32 = 0;
    let mut x55: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x54, &mut x55, x53, x38, (0x0 as u32));
    let mut x56: u32 = 0;
    let mut x57: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x56, &mut x57, x55, x40, (0x0 as u32));
    let mut x58: u32 = 0;
    let mut x59: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x58, &mut x59, x57, x42, (0x0 as u32));
    let mut x60: u32 = 0;
    let mut x61: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x60, &mut x61, x59, x44, (0x0 as u32));
    let mut x62: u32 = 0;
    let mut x63: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x62, &mut x63, x61, x46, (0x0 as u32));
    let mut x64: u32 = 0;
    let mut x65: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x64, &mut x65, x63, x48, (0x0 as u32));
    let mut x66: u32 = 0;
    let mut x67: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x66, &mut x67, x65, x50, (0x0 as u32));
    let mut x68: u32 = 0;
    let mut x69: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x68, &mut x69, x52, 0xea53fa95);
    let mut x70: u32 = 0;
    let mut x71: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x70, &mut x71, x68, 0xffffffff);
    let mut x72: u32 = 0;
    let mut x73: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x72, &mut x73, x68, 0xffffffff);
    let mut x74: u32 = 0;
    let mut x75: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x74, &mut x75, x68, 0xffffffff);
    let mut x76: u32 = 0;
    let mut x77: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x76, &mut x77, x68, 0xffffffff);
    let mut x78: u32 = 0;
    let mut x79: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x78, &mut x79, x68, 0xffffffff);
    let mut x80: u32 = 0;
    let mut x81: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x80, &mut x81, x68, 0xffffffff);
    let mut x82: u32 = 0;
    let mut x83: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x82, &mut x83, x68, 0xffffffff);
    let mut x84: u32 = 0;
    let mut x85: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x84, &mut x85, x68, 0xffffff43);
    let mut x86: u32 = 0;
    let mut x87: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x86, &mut x87, 0x0, x85, x82);
    let mut x88: u32 = 0;
    let mut x89: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x88, &mut x89, x87, x83, x80);
    let mut x90: u32 = 0;
    let mut x91: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x90, &mut x91, x89, x81, x78);
    let mut x92: u32 = 0;
    let mut x93: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x92, &mut x93, x91, x79, x76);
    let mut x94: u32 = 0;
    let mut x95: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x94, &mut x95, x93, x77, x74);
    let mut x96: u32 = 0;
    let mut x97: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x96, &mut x97, x95, x75, x72);
    let mut x98: u32 = 0;
    let mut x99: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x98, &mut x99, x97, x73, x70);
    let mut x100: u32 = 0;
    let mut x101: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x100, &mut x101, 0x0, x52, x84);
    let mut x102: u32 = 0;
    let mut x103: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x102, &mut x103, x101, x54, x86);
    let mut x104: u32 = 0;
    let mut x105: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x104, &mut x105, x103, x56, x88);
    let mut x106: u32 = 0;
    let mut x107: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x106, &mut x107, x105, x58, x90);
    let mut x108: u32 = 0;
    let mut x109: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x108, &mut x109, x107, x60, x92);
    let mut x110: u32 = 0;
    let mut x111: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x110, &mut x111, x109, x62, x94);
    let mut x112: u32 = 0;
    let mut x113: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x112, &mut x113, x111, x64, x96);
    let mut x114: u32 = 0;
    let mut x115: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x114, &mut x115, x113, x66, x98);
    let mut x116: u32 = 0;
    let mut x117: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x116,
        &mut x117,
        x115,
        ((x67 as u32) + (x51 as u32)),
        ((x99 as u32) + x71),
    );
    let mut x118: u32 = 0;
    let mut x119: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x118,
        &mut x119,
        0x0,
        x102,
        (*IndexConst(arg1).index(2)),
    );
    let mut x120: u32 = 0;
    let mut x121: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x120, &mut x121, x119, x104, (0x0 as u32));
    let mut x122: u32 = 0;
    let mut x123: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x122, &mut x123, x121, x106, (0x0 as u32));
    let mut x124: u32 = 0;
    let mut x125: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x124, &mut x125, x123, x108, (0x0 as u32));
    let mut x126: u32 = 0;
    let mut x127: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x126, &mut x127, x125, x110, (0x0 as u32));
    let mut x128: u32 = 0;
    let mut x129: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x128, &mut x129, x127, x112, (0x0 as u32));
    let mut x130: u32 = 0;
    let mut x131: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x130, &mut x131, x129, x114, (0x0 as u32));
    let mut x132: u32 = 0;
    let mut x133: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x132, &mut x133, x131, x116, (0x0 as u32));
    let mut x134: u32 = 0;
    let mut x135: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x134, &mut x135, x118, 0xea53fa95);
    let mut x136: u32 = 0;
    let mut x137: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x136, &mut x137, x134, 0xffffffff);
    let mut x138: u32 = 0;
    let mut x139: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x138, &mut x139, x134, 0xffffffff);
    let mut x140: u32 = 0;
    let mut x141: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x140, &mut x141, x134, 0xffffffff);
    let mut x142: u32 = 0;
    let mut x143: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x142, &mut x143, x134, 0xffffffff);
    let mut x144: u32 = 0;
    let mut x145: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x144, &mut x145, x134, 0xffffffff);
    let mut x146: u32 = 0;
    let mut x147: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x146, &mut x147, x134, 0xffffffff);
    let mut x148: u32 = 0;
    let mut x149: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x148, &mut x149, x134, 0xffffffff);
    let mut x150: u32 = 0;
    let mut x151: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x150, &mut x151, x134, 0xffffff43);
    let mut x152: u32 = 0;
    let mut x153: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x152, &mut x153, 0x0, x151, x148);
    let mut x154: u32 = 0;
    let mut x155: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x154, &mut x155, x153, x149, x146);
    let mut x156: u32 = 0;
    let mut x157: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x156, &mut x157, x155, x147, x144);
    let mut x158: u32 = 0;
    let mut x159: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x158, &mut x159, x157, x145, x142);
    let mut x160: u32 = 0;
    let mut x161: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x160, &mut x161, x159, x143, x140);
    let mut x162: u32 = 0;
    let mut x163: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x162, &mut x163, x161, x141, x138);
    let mut x164: u32 = 0;
    let mut x165: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x164, &mut x165, x163, x139, x136);
    let mut x166: u32 = 0;
    let mut x167: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x166, &mut x167, 0x0, x118, x150);
    let mut x168: u32 = 0;
    let mut x169: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x168, &mut x169, x167, x120, x152);
    let mut x170: u32 = 0;
    let mut x171: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x170, &mut x171, x169, x122, x154);
    let mut x172: u32 = 0;
    let mut x173: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x172, &mut x173, x171, x124, x156);
    let mut x174: u32 = 0;
    let mut x175: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x174, &mut x175, x173, x126, x158);
    let mut x176: u32 = 0;
    let mut x177: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x176, &mut x177, x175, x128, x160);
    let mut x178: u32 = 0;
    let mut x179: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x178, &mut x179, x177, x130, x162);
    let mut x180: u32 = 0;
    let mut x181: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x180, &mut x181, x179, x132, x164);
    let mut x182: u32 = 0;
    let mut x183: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x182,
        &mut x183,
        x181,
        ((x133 as u32) + (x117 as u32)),
        ((x165 as u32) + x137),
    );
    let mut x184: u32 = 0;
    let mut x185: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x184,
        &mut x185,
        0x0,
        x168,
        (*IndexConst(arg1).index(3)),
    );
    let mut x186: u32 = 0;
    let mut x187: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x186, &mut x187, x185, x170, (0x0 as u32));
    let mut x188: u32 = 0;
    let mut x189: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x188, &mut x189, x187, x172, (0x0 as u32));
    let mut x190: u32 = 0;
    let mut x191: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x190, &mut x191, x189, x174, (0x0 as u32));
    let mut x192: u32 = 0;
    let mut x193: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x192, &mut x193, x191, x176, (0x0 as u32));
    let mut x194: u32 = 0;
    let mut x195: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x194, &mut x195, x193, x178, (0x0 as u32));
    let mut x196: u32 = 0;
    let mut x197: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x196, &mut x197, x195, x180, (0x0 as u32));
    let mut x198: u32 = 0;
    let mut x199: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x198, &mut x199, x197, x182, (0x0 as u32));
    let mut x200: u32 = 0;
    let mut x201: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x200, &mut x201, x184, 0xea53fa95);
    let mut x202: u32 = 0;
    let mut x203: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x202, &mut x203, x200, 0xffffffff);
    let mut x204: u32 = 0;
    let mut x205: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x204, &mut x205, x200, 0xffffffff);
    let mut x206: u32 = 0;
    let mut x207: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x206, &mut x207, x200, 0xffffffff);
    let mut x208: u32 = 0;
    let mut x209: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x208, &mut x209, x200, 0xffffffff);
    let mut x210: u32 = 0;
    let mut x211: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x210, &mut x211, x200, 0xffffffff);
    let mut x212: u32 = 0;
    let mut x213: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x212, &mut x213, x200, 0xffffffff);
    let mut x214: u32 = 0;
    let mut x215: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x214, &mut x215, x200, 0xffffffff);
    let mut x216: u32 = 0;
    let mut x217: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x216, &mut x217, x200, 0xffffff43);
    let mut x218: u32 = 0;
    let mut x219: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x218, &mut x219, 0x0, x217, x214);
    let mut x220: u32 = 0;
    let mut x221: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x220, &mut x221, x219, x215, x212);
    let mut x222: u32 = 0;
    let mut x223: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x222, &mut x223, x221, x213, x210);
    let mut x224: u32 = 0;
    let mut x225: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x224, &mut x225, x223, x211, x208);
    let mut x226: u32 = 0;
    let mut x227: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x226, &mut x227, x225, x209, x206);
    let mut x228: u32 = 0;
    let mut x229: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x228, &mut x229, x227, x207, x204);
    let mut x230: u32 = 0;
    let mut x231: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x230, &mut x231, x229, x205, x202);
    let mut x232: u32 = 0;
    let mut x233: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x232, &mut x233, 0x0, x184, x216);
    let mut x234: u32 = 0;
    let mut x235: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x234, &mut x235, x233, x186, x218);
    let mut x236: u32 = 0;
    let mut x237: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x236, &mut x237, x235, x188, x220);
    let mut x238: u32 = 0;
    let mut x239: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x238, &mut x239, x237, x190, x222);
    let mut x240: u32 = 0;
    let mut x241: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x240, &mut x241, x239, x192, x224);
    let mut x242: u32 = 0;
    let mut x243: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x242, &mut x243, x241, x194, x226);
    let mut x244: u32 = 0;
    let mut x245: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x244, &mut x245, x243, x196, x228);
    let mut x246: u32 = 0;
    let mut x247: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x246, &mut x247, x245, x198, x230);
    let mut x248: u32 = 0;
    let mut x249: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x248,
        &mut x249,
        x247,
        ((x199 as u32) + (x183 as u32)),
        ((x231 as u32) + x203),
    );
    let mut x250: u32 = 0;
    let mut x251: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x250,
        &mut x251,
        0x0,
        x234,
        (*IndexConst(arg1).index(4)),
    );
    let mut x252: u32 = 0;
    let mut x253: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x252, &mut x253, x251, x236, (0x0 as u32));
    let mut x254: u32 = 0;
    let mut x255: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x254, &mut x255, x253, x238, (0x0 as u32));
    let mut x256: u32 = 0;
    let mut x257: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x256, &mut x257, x255, x240, (0x0 as u32));
    let mut x258: u32 = 0;
    let mut x259: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x258, &mut x259, x257, x242, (0x0 as u32));
    let mut x260: u32 = 0;
    let mut x261: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x260, &mut x261, x259, x244, (0x0 as u32));
    let mut x262: u32 = 0;
    let mut x263: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x262, &mut x263, x261, x246, (0x0 as u32));
    let mut x264: u32 = 0;
    let mut x265: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x264, &mut x265, x263, x248, (0x0 as u32));
    let mut x266: u32 = 0;
    let mut x267: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x266, &mut x267, x250, 0xea53fa95);
    let mut x268: u32 = 0;
    let mut x269: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x268, &mut x269, x266, 0xffffffff);
    let mut x270: u32 = 0;
    let mut x271: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x270, &mut x271, x266, 0xffffffff);
    let mut x272: u32 = 0;
    let mut x273: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x272, &mut x273, x266, 0xffffffff);
    let mut x274: u32 = 0;
    let mut x275: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x274, &mut x275, x266, 0xffffffff);
    let mut x276: u32 = 0;
    let mut x277: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x276, &mut x277, x266, 0xffffffff);
    let mut x278: u32 = 0;
    let mut x279: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x278, &mut x279, x266, 0xffffffff);
    let mut x280: u32 = 0;
    let mut x281: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x280, &mut x281, x266, 0xffffffff);
    let mut x282: u32 = 0;
    let mut x283: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x282, &mut x283, x266, 0xffffff43);
    let mut x284: u32 = 0;
    let mut x285: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x284, &mut x285, 0x0, x283, x280);
    let mut x286: u32 = 0;
    let mut x287: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x286, &mut x287, x285, x281, x278);
    let mut x288: u32 = 0;
    let mut x289: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x288, &mut x289, x287, x279, x276);
    let mut x290: u32 = 0;
    let mut x291: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x290, &mut x291, x289, x277, x274);
    let mut x292: u32 = 0;
    let mut x293: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x292, &mut x293, x291, x275, x272);
    let mut x294: u32 = 0;
    let mut x295: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x294, &mut x295, x293, x273, x270);
    let mut x296: u32 = 0;
    let mut x297: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x296, &mut x297, x295, x271, x268);
    let mut x298: u32 = 0;
    let mut x299: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x298, &mut x299, 0x0, x250, x282);
    let mut x300: u32 = 0;
    let mut x301: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x300, &mut x301, x299, x252, x284);
    let mut x302: u32 = 0;
    let mut x303: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x302, &mut x303, x301, x254, x286);
    let mut x304: u32 = 0;
    let mut x305: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x304, &mut x305, x303, x256, x288);
    let mut x306: u32 = 0;
    let mut x307: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x306, &mut x307, x305, x258, x290);
    let mut x308: u32 = 0;
    let mut x309: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x308, &mut x309, x307, x260, x292);
    let mut x310: u32 = 0;
    let mut x311: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x310, &mut x311, x309, x262, x294);
    let mut x312: u32 = 0;
    let mut x313: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x312, &mut x313, x311, x264, x296);
    let mut x314: u32 = 0;
    let mut x315: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x314,
        &mut x315,
        x313,
        ((x265 as u32) + (x249 as u32)),
        ((x297 as u32) + x269),
    );
    let mut x316: u32 = 0;
    let mut x317: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x316,
        &mut x317,
        0x0,
        x300,
        (*IndexConst(arg1).index(5)),
    );
    let mut x318: u32 = 0;
    let mut x319: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x318, &mut x319, x317, x302, (0x0 as u32));
    let mut x320: u32 = 0;
    let mut x321: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x320, &mut x321, x319, x304, (0x0 as u32));
    let mut x322: u32 = 0;
    let mut x323: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x322, &mut x323, x321, x306, (0x0 as u32));
    let mut x324: u32 = 0;
    let mut x325: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x324, &mut x325, x323, x308, (0x0 as u32));
    let mut x326: u32 = 0;
    let mut x327: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x326, &mut x327, x325, x310, (0x0 as u32));
    let mut x328: u32 = 0;
    let mut x329: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x328, &mut x329, x327, x312, (0x0 as u32));
    let mut x330: u32 = 0;
    let mut x331: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x330, &mut x331, x329, x314, (0x0 as u32));
    let mut x332: u32 = 0;
    let mut x333: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x332, &mut x333, x316, 0xea53fa95);
    let mut x334: u32 = 0;
    let mut x335: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x334, &mut x335, x332, 0xffffffff);
    let mut x336: u32 = 0;
    let mut x337: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x336, &mut x337, x332, 0xffffffff);
    let mut x338: u32 = 0;
    let mut x339: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x338, &mut x339, x332, 0xffffffff);
    let mut x340: u32 = 0;
    let mut x341: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x340, &mut x341, x332, 0xffffffff);
    let mut x342: u32 = 0;
    let mut x343: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x342, &mut x343, x332, 0xffffffff);
    let mut x344: u32 = 0;
    let mut x345: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x344, &mut x345, x332, 0xffffffff);
    let mut x346: u32 = 0;
    let mut x347: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x346, &mut x347, x332, 0xffffffff);
    let mut x348: u32 = 0;
    let mut x349: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x348, &mut x349, x332, 0xffffff43);
    let mut x350: u32 = 0;
    let mut x351: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x350, &mut x351, 0x0, x349, x346);
    let mut x352: u32 = 0;
    let mut x353: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x352, &mut x353, x351, x347, x344);
    let mut x354: u32 = 0;
    let mut x355: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x354, &mut x355, x353, x345, x342);
    let mut x356: u32 = 0;
    let mut x357: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x356, &mut x357, x355, x343, x340);
    let mut x358: u32 = 0;
    let mut x359: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x358, &mut x359, x357, x341, x338);
    let mut x360: u32 = 0;
    let mut x361: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x360, &mut x361, x359, x339, x336);
    let mut x362: u32 = 0;
    let mut x363: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x362, &mut x363, x361, x337, x334);
    let mut x364: u32 = 0;
    let mut x365: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x364, &mut x365, 0x0, x316, x348);
    let mut x366: u32 = 0;
    let mut x367: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x366, &mut x367, x365, x318, x350);
    let mut x368: u32 = 0;
    let mut x369: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x368, &mut x369, x367, x320, x352);
    let mut x370: u32 = 0;
    let mut x371: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x370, &mut x371, x369, x322, x354);
    let mut x372: u32 = 0;
    let mut x373: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x372, &mut x373, x371, x324, x356);
    let mut x374: u32 = 0;
    let mut x375: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x374, &mut x375, x373, x326, x358);
    let mut x376: u32 = 0;
    let mut x377: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x376, &mut x377, x375, x328, x360);
    let mut x378: u32 = 0;
    let mut x379: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x378, &mut x379, x377, x330, x362);
    let mut x380: u32 = 0;
    let mut x381: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x380,
        &mut x381,
        x379,
        ((x331 as u32) + (x315 as u32)),
        ((x363 as u32) + x335),
    );
    let mut x382: u32 = 0;
    let mut x383: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x382,
        &mut x383,
        0x0,
        x366,
        (*IndexConst(arg1).index(6)),
    );
    let mut x384: u32 = 0;
    let mut x385: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x384, &mut x385, x383, x368, (0x0 as u32));
    let mut x386: u32 = 0;
    let mut x387: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x386, &mut x387, x385, x370, (0x0 as u32));
    let mut x388: u32 = 0;
    let mut x389: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x388, &mut x389, x387, x372, (0x0 as u32));
    let mut x390: u32 = 0;
    let mut x391: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x390, &mut x391, x389, x374, (0x0 as u32));
    let mut x392: u32 = 0;
    let mut x393: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x392, &mut x393, x391, x376, (0x0 as u32));
    let mut x394: u32 = 0;
    let mut x395: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x394, &mut x395, x393, x378, (0x0 as u32));
    let mut x396: u32 = 0;
    let mut x397: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x396, &mut x397, x395, x380, (0x0 as u32));
    let mut x398: u32 = 0;
    let mut x399: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x398, &mut x399, x382, 0xea53fa95);
    let mut x400: u32 = 0;
    let mut x401: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x400, &mut x401, x398, 0xffffffff);
    let mut x402: u32 = 0;
    let mut x403: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x402, &mut x403, x398, 0xffffffff);
    let mut x404: u32 = 0;
    let mut x405: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x404, &mut x405, x398, 0xffffffff);
    let mut x406: u32 = 0;
    let mut x407: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x406, &mut x407, x398, 0xffffffff);
    let mut x408: u32 = 0;
    let mut x409: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x408, &mut x409, x398, 0xffffffff);
    let mut x410: u32 = 0;
    let mut x411: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x410, &mut x411, x398, 0xffffffff);
    let mut x412: u32 = 0;
    let mut x413: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x412, &mut x413, x398, 0xffffffff);
    let mut x414: u32 = 0;
    let mut x415: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x414, &mut x415, x398, 0xffffff43);
    let mut x416: u32 = 0;
    let mut x417: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x416, &mut x417, 0x0, x415, x412);
    let mut x418: u32 = 0;
    let mut x419: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x418, &mut x419, x417, x413, x410);
    let mut x420: u32 = 0;
    let mut x421: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x420, &mut x421, x419, x411, x408);
    let mut x422: u32 = 0;
    let mut x423: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x422, &mut x423, x421, x409, x406);
    let mut x424: u32 = 0;
    let mut x425: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x424, &mut x425, x423, x407, x404);
    let mut x426: u32 = 0;
    let mut x427: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x426, &mut x427, x425, x405, x402);
    let mut x428: u32 = 0;
    let mut x429: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x428, &mut x429, x427, x403, x400);
    let mut x430: u32 = 0;
    let mut x431: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x430, &mut x431, 0x0, x382, x414);
    let mut x432: u32 = 0;
    let mut x433: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x432, &mut x433, x431, x384, x416);
    let mut x434: u32 = 0;
    let mut x435: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x434, &mut x435, x433, x386, x418);
    let mut x436: u32 = 0;
    let mut x437: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x436, &mut x437, x435, x388, x420);
    let mut x438: u32 = 0;
    let mut x439: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x438, &mut x439, x437, x390, x422);
    let mut x440: u32 = 0;
    let mut x441: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x440, &mut x441, x439, x392, x424);
    let mut x442: u32 = 0;
    let mut x443: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x442, &mut x443, x441, x394, x426);
    let mut x444: u32 = 0;
    let mut x445: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x444, &mut x445, x443, x396, x428);
    let mut x446: u32 = 0;
    let mut x447: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x446,
        &mut x447,
        x445,
        ((x397 as u32) + (x381 as u32)),
        ((x429 as u32) + x401),
    );
    let mut x448: u32 = 0;
    let mut x449: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x448,
        &mut x449,
        0x0,
        x432,
        (*IndexConst(arg1).index(7)),
    );
    let mut x450: u32 = 0;
    let mut x451: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x450, &mut x451, x449, x434, (0x0 as u32));
    let mut x452: u32 = 0;
    let mut x453: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x452, &mut x453, x451, x436, (0x0 as u32));
    let mut x454: u32 = 0;
    let mut x455: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x454, &mut x455, x453, x438, (0x0 as u32));
    let mut x456: u32 = 0;
    let mut x457: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x456, &mut x457, x455, x440, (0x0 as u32));
    let mut x458: u32 = 0;
    let mut x459: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x458, &mut x459, x457, x442, (0x0 as u32));
    let mut x460: u32 = 0;
    let mut x461: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x460, &mut x461, x459, x444, (0x0 as u32));
    let mut x462: u32 = 0;
    let mut x463: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x462, &mut x463, x461, x446, (0x0 as u32));
    let mut x464: u32 = 0;
    let mut x465: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x464, &mut x465, x448, 0xea53fa95);
    let mut x466: u32 = 0;
    let mut x467: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x466, &mut x467, x464, 0xffffffff);
    let mut x468: u32 = 0;
    let mut x469: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x468, &mut x469, x464, 0xffffffff);
    let mut x470: u32 = 0;
    let mut x471: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x470, &mut x471, x464, 0xffffffff);
    let mut x472: u32 = 0;
    let mut x473: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x472, &mut x473, x464, 0xffffffff);
    let mut x474: u32 = 0;
    let mut x475: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x474, &mut x475, x464, 0xffffffff);
    let mut x476: u32 = 0;
    let mut x477: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x476, &mut x477, x464, 0xffffffff);
    let mut x478: u32 = 0;
    let mut x479: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x478, &mut x479, x464, 0xffffffff);
    let mut x480: u32 = 0;
    let mut x481: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x480, &mut x481, x464, 0xffffff43);
    let mut x482: u32 = 0;
    let mut x483: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x482, &mut x483, 0x0, x481, x478);
    let mut x484: u32 = 0;
    let mut x485: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x484, &mut x485, x483, x479, x476);
    let mut x486: u32 = 0;
    let mut x487: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x486, &mut x487, x485, x477, x474);
    let mut x488: u32 = 0;
    let mut x489: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x488, &mut x489, x487, x475, x472);
    let mut x490: u32 = 0;
    let mut x491: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x490, &mut x491, x489, x473, x470);
    let mut x492: u32 = 0;
    let mut x493: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x492, &mut x493, x491, x471, x468);
    let mut x494: u32 = 0;
    let mut x495: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x494, &mut x495, x493, x469, x466);
    let mut x496: u32 = 0;
    let mut x497: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x496, &mut x497, 0x0, x448, x480);
    let mut x498: u32 = 0;
    let mut x499: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x498, &mut x499, x497, x450, x482);
    let mut x500: u32 = 0;
    let mut x501: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x500, &mut x501, x499, x452, x484);
    let mut x502: u32 = 0;
    let mut x503: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x502, &mut x503, x501, x454, x486);
    let mut x504: u32 = 0;
    let mut x505: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x504, &mut x505, x503, x456, x488);
    let mut x506: u32 = 0;
    let mut x507: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x506, &mut x507, x505, x458, x490);
    let mut x508: u32 = 0;
    let mut x509: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x508, &mut x509, x507, x460, x492);
    let mut x510: u32 = 0;
    let mut x511: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x510, &mut x511, x509, x462, x494);
    let mut x512: u32 = 0;
    let mut x513: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x512,
        &mut x513,
        x511,
        ((x463 as u32) + (x447 as u32)),
        ((x495 as u32) + x467),
    );
    let mut x514: u32 = 0;
    let mut x515: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x514, &mut x515, 0x0, x498, 0xffffff43);
    let mut x516: u32 = 0;
    let mut x517: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x516, &mut x517, x515, x500, 0xffffffff);
    let mut x518: u32 = 0;
    let mut x519: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x518, &mut x519, x517, x502, 0xffffffff);
    let mut x520: u32 = 0;
    let mut x521: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x520, &mut x521, x519, x504, 0xffffffff);
    let mut x522: u32 = 0;
    let mut x523: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x522, &mut x523, x521, x506, 0xffffffff);
    let mut x524: u32 = 0;
    let mut x525: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x524, &mut x525, x523, x508, 0xffffffff);
    let mut x526: u32 = 0;
    let mut x527: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x526, &mut x527, x525, x510, 0xffffffff);
    let mut x528: u32 = 0;
    let mut x529: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x528, &mut x529, x527, x512, 0xffffffff);
    let mut x530: u32 = 0;
    let mut x531: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x530, &mut x531, x529, (x513 as u32), (0x0 as u32));
    let mut x532: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x532, x531, x514, x498);
    let mut x533: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x533, x531, x516, x500);
    let mut x534: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x534, x531, x518, x502);
    let mut x535: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x535, x531, x520, x504);
    let mut x536: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x536, x531, x522, x506);
    let mut x537: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x537, x531, x524, x508);
    let mut x538: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x538, x531, x526, x510);
    let mut x539: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x539, x531, x528, x512);
    *IndexConst(&mut out1).index_mut(0) = x532;
    *IndexConst(&mut out1).index_mut(1) = x533;
    *IndexConst(&mut out1).index_mut(2) = x534;
    *IndexConst(&mut out1).index_mut(3) = x535;
    *IndexConst(&mut out1).index_mut(4) = x536;
    *IndexConst(&mut out1).index_mut(5) = x537;
    *IndexConst(&mut out1).index_mut(6) = x538;
    *IndexConst(&mut out1).index_mut(7) = x539;
}

/// The function fiat_bignp256_to_montgomery translates a field element into the Montgomery domain.
///
/// Preconditions:
///   0 ≤ eval arg1 < m
/// Postconditions:
///   eval (from_montgomery out1) mod m = eval arg1 mod m
///   0 ≤ eval out1 < m
///
#[inline]
pub const fn fiat_bignp256_to_montgomery(
    mut out1: &mut fiat_bignp256_montgomery_domain_field_element,
    arg1: &fiat_bignp256_non_montgomery_domain_field_element,
) {
    let mut x1: u32 = 0;
    let mut x2: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x1, &mut x2, (*IndexConst(arg1).index(0)), 0x8b89);
    let mut x3: u32 = 0;
    let mut x4: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x3, &mut x4, x1, 0xea53fa95);
    let mut x5: u32 = 0;
    let mut x6: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x5, &mut x6, x3, 0xffffffff);
    let mut x7: u32 = 0;
    let mut x8: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x7, &mut x8, x3, 0xffffffff);
    let mut x9: u32 = 0;
    let mut x10: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x9, &mut x10, x3, 0xffffffff);
    let mut x11: u32 = 0;
    let mut x12: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x11, &mut x12, x3, 0xffffffff);
    let mut x13: u32 = 0;
    let mut x14: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x13, &mut x14, x3, 0xffffffff);
    let mut x15: u32 = 0;
    let mut x16: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x15, &mut x16, x3, 0xffffffff);
    let mut x17: u32 = 0;
    let mut x18: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x17, &mut x18, x3, 0xffffffff);
    let mut x19: u32 = 0;
    let mut x20: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x19, &mut x20, x3, 0xffffff43);
    let mut x21: u32 = 0;
    let mut x22: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x21, &mut x22, 0x0, x20, x17);
    let mut x23: u32 = 0;
    let mut x24: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x23, &mut x24, x22, x18, x15);
    let mut x25: u32 = 0;
    let mut x26: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x25, &mut x26, x24, x16, x13);
    let mut x27: u32 = 0;
    let mut x28: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x27, &mut x28, x26, x14, x11);
    let mut x29: u32 = 0;
    let mut x30: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x29, &mut x30, x28, x12, x9);
    let mut x31: u32 = 0;
    let mut x32: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x31, &mut x32, x30, x10, x7);
    let mut x33: u32 = 0;
    let mut x34: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x33, &mut x34, x32, x8, x5);
    let mut x35: u32 = 0;
    let mut x36: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x35, &mut x36, 0x0, x1, x19);
    let mut x37: u32 = 0;
    let mut x38: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x37, &mut x38, x36, x2, x21);
    let mut x39: u32 = 0;
    let mut x40: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x39, &mut x40, x38, (0x0 as u32), x23);
    let mut x41: u32 = 0;
    let mut x42: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x41, &mut x42, x40, (0x0 as u32), x25);
    let mut x43: u32 = 0;
    let mut x44: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x43, &mut x44, x42, (0x0 as u32), x27);
    let mut x45: u32 = 0;
    let mut x46: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x45, &mut x46, x44, (0x0 as u32), x29);
    let mut x47: u32 = 0;
    let mut x48: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x47, &mut x48, x46, (0x0 as u32), x31);
    let mut x49: u32 = 0;
    let mut x50: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x49, &mut x50, x48, (0x0 as u32), x33);
    let mut x51: u32 = 0;
    let mut x52: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x51, &mut x52, x50, (0x0 as u32), ((x34 as u32) + x6));
    let mut x53: u32 = 0;
    let mut x54: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x53, &mut x54, (*IndexConst(arg1).index(1)), 0x8b89);
    let mut x55: u32 = 0;
    let mut x56: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x55, &mut x56, 0x0, x37, x53);
    let mut x57: u32 = 0;
    let mut x58: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x57, &mut x58, x56, x39, x54);
    let mut x59: u32 = 0;
    let mut x60: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x59, &mut x60, x58, x41, (0x0 as u32));
    let mut x61: u32 = 0;
    let mut x62: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x61, &mut x62, x60, x43, (0x0 as u32));
    let mut x63: u32 = 0;
    let mut x64: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x63, &mut x64, x62, x45, (0x0 as u32));
    let mut x65: u32 = 0;
    let mut x66: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x65, &mut x66, x64, x47, (0x0 as u32));
    let mut x67: u32 = 0;
    let mut x68: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x67, &mut x68, x66, x49, (0x0 as u32));
    let mut x69: u32 = 0;
    let mut x70: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x69, &mut x70, x68, x51, (0x0 as u32));
    let mut x71: u32 = 0;
    let mut x72: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x71, &mut x72, x55, 0xea53fa95);
    let mut x73: u32 = 0;
    let mut x74: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x73, &mut x74, x71, 0xffffffff);
    let mut x75: u32 = 0;
    let mut x76: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x75, &mut x76, x71, 0xffffffff);
    let mut x77: u32 = 0;
    let mut x78: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x77, &mut x78, x71, 0xffffffff);
    let mut x79: u32 = 0;
    let mut x80: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x79, &mut x80, x71, 0xffffffff);
    let mut x81: u32 = 0;
    let mut x82: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x81, &mut x82, x71, 0xffffffff);
    let mut x83: u32 = 0;
    let mut x84: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x83, &mut x84, x71, 0xffffffff);
    let mut x85: u32 = 0;
    let mut x86: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x85, &mut x86, x71, 0xffffffff);
    let mut x87: u32 = 0;
    let mut x88: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x87, &mut x88, x71, 0xffffff43);
    let mut x89: u32 = 0;
    let mut x90: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x89, &mut x90, 0x0, x88, x85);
    let mut x91: u32 = 0;
    let mut x92: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x91, &mut x92, x90, x86, x83);
    let mut x93: u32 = 0;
    let mut x94: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x93, &mut x94, x92, x84, x81);
    let mut x95: u32 = 0;
    let mut x96: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x95, &mut x96, x94, x82, x79);
    let mut x97: u32 = 0;
    let mut x98: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x97, &mut x98, x96, x80, x77);
    let mut x99: u32 = 0;
    let mut x100: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x99, &mut x100, x98, x78, x75);
    let mut x101: u32 = 0;
    let mut x102: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x101, &mut x102, x100, x76, x73);
    let mut x103: u32 = 0;
    let mut x104: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x103, &mut x104, 0x0, x55, x87);
    let mut x105: u32 = 0;
    let mut x106: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x105, &mut x106, x104, x57, x89);
    let mut x107: u32 = 0;
    let mut x108: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x107, &mut x108, x106, x59, x91);
    let mut x109: u32 = 0;
    let mut x110: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x109, &mut x110, x108, x61, x93);
    let mut x111: u32 = 0;
    let mut x112: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x111, &mut x112, x110, x63, x95);
    let mut x113: u32 = 0;
    let mut x114: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x113, &mut x114, x112, x65, x97);
    let mut x115: u32 = 0;
    let mut x116: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x115, &mut x116, x114, x67, x99);
    let mut x117: u32 = 0;
    let mut x118: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x117, &mut x118, x116, x69, x101);
    let mut x119: u32 = 0;
    let mut x120: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x119,
        &mut x120,
        x118,
        ((x70 as u32) + (x52 as u32)),
        ((x102 as u32) + x74),
    );
    let mut x121: u32 = 0;
    let mut x122: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x121, &mut x122, (*IndexConst(arg1).index(2)), 0x8b89);
    let mut x123: u32 = 0;
    let mut x124: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x123, &mut x124, 0x0, x105, x121);
    let mut x125: u32 = 0;
    let mut x126: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x125, &mut x126, x124, x107, x122);
    let mut x127: u32 = 0;
    let mut x128: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x127, &mut x128, x126, x109, (0x0 as u32));
    let mut x129: u32 = 0;
    let mut x130: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x129, &mut x130, x128, x111, (0x0 as u32));
    let mut x131: u32 = 0;
    let mut x132: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x131, &mut x132, x130, x113, (0x0 as u32));
    let mut x133: u32 = 0;
    let mut x134: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x133, &mut x134, x132, x115, (0x0 as u32));
    let mut x135: u32 = 0;
    let mut x136: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x135, &mut x136, x134, x117, (0x0 as u32));
    let mut x137: u32 = 0;
    let mut x138: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x137, &mut x138, x136, x119, (0x0 as u32));
    let mut x139: u32 = 0;
    let mut x140: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x139, &mut x140, x123, 0xea53fa95);
    let mut x141: u32 = 0;
    let mut x142: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x141, &mut x142, x139, 0xffffffff);
    let mut x143: u32 = 0;
    let mut x144: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x143, &mut x144, x139, 0xffffffff);
    let mut x145: u32 = 0;
    let mut x146: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x145, &mut x146, x139, 0xffffffff);
    let mut x147: u32 = 0;
    let mut x148: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x147, &mut x148, x139, 0xffffffff);
    let mut x149: u32 = 0;
    let mut x150: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x149, &mut x150, x139, 0xffffffff);
    let mut x151: u32 = 0;
    let mut x152: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x151, &mut x152, x139, 0xffffffff);
    let mut x153: u32 = 0;
    let mut x154: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x153, &mut x154, x139, 0xffffffff);
    let mut x155: u32 = 0;
    let mut x156: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x155, &mut x156, x139, 0xffffff43);
    let mut x157: u32 = 0;
    let mut x158: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x157, &mut x158, 0x0, x156, x153);
    let mut x159: u32 = 0;
    let mut x160: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x159, &mut x160, x158, x154, x151);
    let mut x161: u32 = 0;
    let mut x162: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x161, &mut x162, x160, x152, x149);
    let mut x163: u32 = 0;
    let mut x164: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x163, &mut x164, x162, x150, x147);
    let mut x165: u32 = 0;
    let mut x166: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x165, &mut x166, x164, x148, x145);
    let mut x167: u32 = 0;
    let mut x168: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x167, &mut x168, x166, x146, x143);
    let mut x169: u32 = 0;
    let mut x170: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x169, &mut x170, x168, x144, x141);
    let mut x171: u32 = 0;
    let mut x172: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x171, &mut x172, 0x0, x123, x155);
    let mut x173: u32 = 0;
    let mut x174: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x173, &mut x174, x172, x125, x157);
    let mut x175: u32 = 0;
    let mut x176: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x175, &mut x176, x174, x127, x159);
    let mut x177: u32 = 0;
    let mut x178: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x177, &mut x178, x176, x129, x161);
    let mut x179: u32 = 0;
    let mut x180: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x179, &mut x180, x178, x131, x163);
    let mut x181: u32 = 0;
    let mut x182: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x181, &mut x182, x180, x133, x165);
    let mut x183: u32 = 0;
    let mut x184: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x183, &mut x184, x182, x135, x167);
    let mut x185: u32 = 0;
    let mut x186: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x185, &mut x186, x184, x137, x169);
    let mut x187: u32 = 0;
    let mut x188: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x187,
        &mut x188,
        x186,
        ((x138 as u32) + (x120 as u32)),
        ((x170 as u32) + x142),
    );
    let mut x189: u32 = 0;
    let mut x190: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x189, &mut x190, (*IndexConst(arg1).index(3)), 0x8b89);
    let mut x191: u32 = 0;
    let mut x192: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x191, &mut x192, 0x0, x173, x189);
    let mut x193: u32 = 0;
    let mut x194: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x193, &mut x194, x192, x175, x190);
    let mut x195: u32 = 0;
    let mut x196: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x195, &mut x196, x194, x177, (0x0 as u32));
    let mut x197: u32 = 0;
    let mut x198: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x197, &mut x198, x196, x179, (0x0 as u32));
    let mut x199: u32 = 0;
    let mut x200: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x199, &mut x200, x198, x181, (0x0 as u32));
    let mut x201: u32 = 0;
    let mut x202: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x201, &mut x202, x200, x183, (0x0 as u32));
    let mut x203: u32 = 0;
    let mut x204: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x203, &mut x204, x202, x185, (0x0 as u32));
    let mut x205: u32 = 0;
    let mut x206: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x205, &mut x206, x204, x187, (0x0 as u32));
    let mut x207: u32 = 0;
    let mut x208: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x207, &mut x208, x191, 0xea53fa95);
    let mut x209: u32 = 0;
    let mut x210: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x209, &mut x210, x207, 0xffffffff);
    let mut x211: u32 = 0;
    let mut x212: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x211, &mut x212, x207, 0xffffffff);
    let mut x213: u32 = 0;
    let mut x214: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x213, &mut x214, x207, 0xffffffff);
    let mut x215: u32 = 0;
    let mut x216: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x215, &mut x216, x207, 0xffffffff);
    let mut x217: u32 = 0;
    let mut x218: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x217, &mut x218, x207, 0xffffffff);
    let mut x219: u32 = 0;
    let mut x220: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x219, &mut x220, x207, 0xffffffff);
    let mut x221: u32 = 0;
    let mut x222: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x221, &mut x222, x207, 0xffffffff);
    let mut x223: u32 = 0;
    let mut x224: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x223, &mut x224, x207, 0xffffff43);
    let mut x225: u32 = 0;
    let mut x226: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x225, &mut x226, 0x0, x224, x221);
    let mut x227: u32 = 0;
    let mut x228: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x227, &mut x228, x226, x222, x219);
    let mut x229: u32 = 0;
    let mut x230: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x229, &mut x230, x228, x220, x217);
    let mut x231: u32 = 0;
    let mut x232: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x231, &mut x232, x230, x218, x215);
    let mut x233: u32 = 0;
    let mut x234: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x233, &mut x234, x232, x216, x213);
    let mut x235: u32 = 0;
    let mut x236: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x235, &mut x236, x234, x214, x211);
    let mut x237: u32 = 0;
    let mut x238: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x237, &mut x238, x236, x212, x209);
    let mut x239: u32 = 0;
    let mut x240: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x239, &mut x240, 0x0, x191, x223);
    let mut x241: u32 = 0;
    let mut x242: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x241, &mut x242, x240, x193, x225);
    let mut x243: u32 = 0;
    let mut x244: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x243, &mut x244, x242, x195, x227);
    let mut x245: u32 = 0;
    let mut x246: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x245, &mut x246, x244, x197, x229);
    let mut x247: u32 = 0;
    let mut x248: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x247, &mut x248, x246, x199, x231);
    let mut x249: u32 = 0;
    let mut x250: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x249, &mut x250, x248, x201, x233);
    let mut x251: u32 = 0;
    let mut x252: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x251, &mut x252, x250, x203, x235);
    let mut x253: u32 = 0;
    let mut x254: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x253, &mut x254, x252, x205, x237);
    let mut x255: u32 = 0;
    let mut x256: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x255,
        &mut x256,
        x254,
        ((x206 as u32) + (x188 as u32)),
        ((x238 as u32) + x210),
    );
    let mut x257: u32 = 0;
    let mut x258: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x257, &mut x258, (*IndexConst(arg1).index(4)), 0x8b89);
    let mut x259: u32 = 0;
    let mut x260: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x259, &mut x260, 0x0, x241, x257);
    let mut x261: u32 = 0;
    let mut x262: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x261, &mut x262, x260, x243, x258);
    let mut x263: u32 = 0;
    let mut x264: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x263, &mut x264, x262, x245, (0x0 as u32));
    let mut x265: u32 = 0;
    let mut x266: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x265, &mut x266, x264, x247, (0x0 as u32));
    let mut x267: u32 = 0;
    let mut x268: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x267, &mut x268, x266, x249, (0x0 as u32));
    let mut x269: u32 = 0;
    let mut x270: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x269, &mut x270, x268, x251, (0x0 as u32));
    let mut x271: u32 = 0;
    let mut x272: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x271, &mut x272, x270, x253, (0x0 as u32));
    let mut x273: u32 = 0;
    let mut x274: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x273, &mut x274, x272, x255, (0x0 as u32));
    let mut x275: u32 = 0;
    let mut x276: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x275, &mut x276, x259, 0xea53fa95);
    let mut x277: u32 = 0;
    let mut x278: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x277, &mut x278, x275, 0xffffffff);
    let mut x279: u32 = 0;
    let mut x280: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x279, &mut x280, x275, 0xffffffff);
    let mut x281: u32 = 0;
    let mut x282: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x281, &mut x282, x275, 0xffffffff);
    let mut x283: u32 = 0;
    let mut x284: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x283, &mut x284, x275, 0xffffffff);
    let mut x285: u32 = 0;
    let mut x286: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x285, &mut x286, x275, 0xffffffff);
    let mut x287: u32 = 0;
    let mut x288: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x287, &mut x288, x275, 0xffffffff);
    let mut x289: u32 = 0;
    let mut x290: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x289, &mut x290, x275, 0xffffffff);
    let mut x291: u32 = 0;
    let mut x292: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x291, &mut x292, x275, 0xffffff43);
    let mut x293: u32 = 0;
    let mut x294: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x293, &mut x294, 0x0, x292, x289);
    let mut x295: u32 = 0;
    let mut x296: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x295, &mut x296, x294, x290, x287);
    let mut x297: u32 = 0;
    let mut x298: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x297, &mut x298, x296, x288, x285);
    let mut x299: u32 = 0;
    let mut x300: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x299, &mut x300, x298, x286, x283);
    let mut x301: u32 = 0;
    let mut x302: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x301, &mut x302, x300, x284, x281);
    let mut x303: u32 = 0;
    let mut x304: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x303, &mut x304, x302, x282, x279);
    let mut x305: u32 = 0;
    let mut x306: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x305, &mut x306, x304, x280, x277);
    let mut x307: u32 = 0;
    let mut x308: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x307, &mut x308, 0x0, x259, x291);
    let mut x309: u32 = 0;
    let mut x310: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x309, &mut x310, x308, x261, x293);
    let mut x311: u32 = 0;
    let mut x312: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x311, &mut x312, x310, x263, x295);
    let mut x313: u32 = 0;
    let mut x314: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x313, &mut x314, x312, x265, x297);
    let mut x315: u32 = 0;
    let mut x316: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x315, &mut x316, x314, x267, x299);
    let mut x317: u32 = 0;
    let mut x318: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x317, &mut x318, x316, x269, x301);
    let mut x319: u32 = 0;
    let mut x320: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x319, &mut x320, x318, x271, x303);
    let mut x321: u32 = 0;
    let mut x322: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x321, &mut x322, x320, x273, x305);
    let mut x323: u32 = 0;
    let mut x324: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x323,
        &mut x324,
        x322,
        ((x274 as u32) + (x256 as u32)),
        ((x306 as u32) + x278),
    );
    let mut x325: u32 = 0;
    let mut x326: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x325, &mut x326, (*IndexConst(arg1).index(5)), 0x8b89);
    let mut x327: u32 = 0;
    let mut x328: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x327, &mut x328, 0x0, x309, x325);
    let mut x329: u32 = 0;
    let mut x330: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x329, &mut x330, x328, x311, x326);
    let mut x331: u32 = 0;
    let mut x332: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x331, &mut x332, x330, x313, (0x0 as u32));
    let mut x333: u32 = 0;
    let mut x334: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x333, &mut x334, x332, x315, (0x0 as u32));
    let mut x335: u32 = 0;
    let mut x336: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x335, &mut x336, x334, x317, (0x0 as u32));
    let mut x337: u32 = 0;
    let mut x338: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x337, &mut x338, x336, x319, (0x0 as u32));
    let mut x339: u32 = 0;
    let mut x340: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x339, &mut x340, x338, x321, (0x0 as u32));
    let mut x341: u32 = 0;
    let mut x342: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x341, &mut x342, x340, x323, (0x0 as u32));
    let mut x343: u32 = 0;
    let mut x344: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x343, &mut x344, x327, 0xea53fa95);
    let mut x345: u32 = 0;
    let mut x346: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x345, &mut x346, x343, 0xffffffff);
    let mut x347: u32 = 0;
    let mut x348: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x347, &mut x348, x343, 0xffffffff);
    let mut x349: u32 = 0;
    let mut x350: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x349, &mut x350, x343, 0xffffffff);
    let mut x351: u32 = 0;
    let mut x352: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x351, &mut x352, x343, 0xffffffff);
    let mut x353: u32 = 0;
    let mut x354: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x353, &mut x354, x343, 0xffffffff);
    let mut x355: u32 = 0;
    let mut x356: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x355, &mut x356, x343, 0xffffffff);
    let mut x357: u32 = 0;
    let mut x358: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x357, &mut x358, x343, 0xffffffff);
    let mut x359: u32 = 0;
    let mut x360: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x359, &mut x360, x343, 0xffffff43);
    let mut x361: u32 = 0;
    let mut x362: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x361, &mut x362, 0x0, x360, x357);
    let mut x363: u32 = 0;
    let mut x364: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x363, &mut x364, x362, x358, x355);
    let mut x365: u32 = 0;
    let mut x366: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x365, &mut x366, x364, x356, x353);
    let mut x367: u32 = 0;
    let mut x368: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x367, &mut x368, x366, x354, x351);
    let mut x369: u32 = 0;
    let mut x370: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x369, &mut x370, x368, x352, x349);
    let mut x371: u32 = 0;
    let mut x372: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x371, &mut x372, x370, x350, x347);
    let mut x373: u32 = 0;
    let mut x374: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x373, &mut x374, x372, x348, x345);
    let mut x375: u32 = 0;
    let mut x376: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x375, &mut x376, 0x0, x327, x359);
    let mut x377: u32 = 0;
    let mut x378: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x377, &mut x378, x376, x329, x361);
    let mut x379: u32 = 0;
    let mut x380: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x379, &mut x380, x378, x331, x363);
    let mut x381: u32 = 0;
    let mut x382: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x381, &mut x382, x380, x333, x365);
    let mut x383: u32 = 0;
    let mut x384: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x383, &mut x384, x382, x335, x367);
    let mut x385: u32 = 0;
    let mut x386: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x385, &mut x386, x384, x337, x369);
    let mut x387: u32 = 0;
    let mut x388: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x387, &mut x388, x386, x339, x371);
    let mut x389: u32 = 0;
    let mut x390: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x389, &mut x390, x388, x341, x373);
    let mut x391: u32 = 0;
    let mut x392: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x391,
        &mut x392,
        x390,
        ((x342 as u32) + (x324 as u32)),
        ((x374 as u32) + x346),
    );
    let mut x393: u32 = 0;
    let mut x394: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x393, &mut x394, (*IndexConst(arg1).index(6)), 0x8b89);
    let mut x395: u32 = 0;
    let mut x396: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x395, &mut x396, 0x0, x377, x393);
    let mut x397: u32 = 0;
    let mut x398: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x397, &mut x398, x396, x379, x394);
    let mut x399: u32 = 0;
    let mut x400: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x399, &mut x400, x398, x381, (0x0 as u32));
    let mut x401: u32 = 0;
    let mut x402: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x401, &mut x402, x400, x383, (0x0 as u32));
    let mut x403: u32 = 0;
    let mut x404: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x403, &mut x404, x402, x385, (0x0 as u32));
    let mut x405: u32 = 0;
    let mut x406: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x405, &mut x406, x404, x387, (0x0 as u32));
    let mut x407: u32 = 0;
    let mut x408: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x407, &mut x408, x406, x389, (0x0 as u32));
    let mut x409: u32 = 0;
    let mut x410: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x409, &mut x410, x408, x391, (0x0 as u32));
    let mut x411: u32 = 0;
    let mut x412: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x411, &mut x412, x395, 0xea53fa95);
    let mut x413: u32 = 0;
    let mut x414: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x413, &mut x414, x411, 0xffffffff);
    let mut x415: u32 = 0;
    let mut x416: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x415, &mut x416, x411, 0xffffffff);
    let mut x417: u32 = 0;
    let mut x418: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x417, &mut x418, x411, 0xffffffff);
    let mut x419: u32 = 0;
    let mut x420: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x419, &mut x420, x411, 0xffffffff);
    let mut x421: u32 = 0;
    let mut x422: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x421, &mut x422, x411, 0xffffffff);
    let mut x423: u32 = 0;
    let mut x424: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x423, &mut x424, x411, 0xffffffff);
    let mut x425: u32 = 0;
    let mut x426: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x425, &mut x426, x411, 0xffffffff);
    let mut x427: u32 = 0;
    let mut x428: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x427, &mut x428, x411, 0xffffff43);
    let mut x429: u32 = 0;
    let mut x430: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x429, &mut x430, 0x0, x428, x425);
    let mut x431: u32 = 0;
    let mut x432: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x431, &mut x432, x430, x426, x423);
    let mut x433: u32 = 0;
    let mut x434: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x433, &mut x434, x432, x424, x421);
    let mut x435: u32 = 0;
    let mut x436: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x435, &mut x436, x434, x422, x419);
    let mut x437: u32 = 0;
    let mut x438: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x437, &mut x438, x436, x420, x417);
    let mut x439: u32 = 0;
    let mut x440: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x439, &mut x440, x438, x418, x415);
    let mut x441: u32 = 0;
    let mut x442: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x441, &mut x442, x440, x416, x413);
    let mut x443: u32 = 0;
    let mut x444: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x443, &mut x444, 0x0, x395, x427);
    let mut x445: u32 = 0;
    let mut x446: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x445, &mut x446, x444, x397, x429);
    let mut x447: u32 = 0;
    let mut x448: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x447, &mut x448, x446, x399, x431);
    let mut x449: u32 = 0;
    let mut x450: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x449, &mut x450, x448, x401, x433);
    let mut x451: u32 = 0;
    let mut x452: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x451, &mut x452, x450, x403, x435);
    let mut x453: u32 = 0;
    let mut x454: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x453, &mut x454, x452, x405, x437);
    let mut x455: u32 = 0;
    let mut x456: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x455, &mut x456, x454, x407, x439);
    let mut x457: u32 = 0;
    let mut x458: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x457, &mut x458, x456, x409, x441);
    let mut x459: u32 = 0;
    let mut x460: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x459,
        &mut x460,
        x458,
        ((x410 as u32) + (x392 as u32)),
        ((x442 as u32) + x414),
    );
    let mut x461: u32 = 0;
    let mut x462: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x461, &mut x462, (*IndexConst(arg1).index(7)), 0x8b89);
    let mut x463: u32 = 0;
    let mut x464: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x463, &mut x464, 0x0, x445, x461);
    let mut x465: u32 = 0;
    let mut x466: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x465, &mut x466, x464, x447, x462);
    let mut x467: u32 = 0;
    let mut x468: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x467, &mut x468, x466, x449, (0x0 as u32));
    let mut x469: u32 = 0;
    let mut x470: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x469, &mut x470, x468, x451, (0x0 as u32));
    let mut x471: u32 = 0;
    let mut x472: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x471, &mut x472, x470, x453, (0x0 as u32));
    let mut x473: u32 = 0;
    let mut x474: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x473, &mut x474, x472, x455, (0x0 as u32));
    let mut x475: u32 = 0;
    let mut x476: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x475, &mut x476, x474, x457, (0x0 as u32));
    let mut x477: u32 = 0;
    let mut x478: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x477, &mut x478, x476, x459, (0x0 as u32));
    let mut x479: u32 = 0;
    let mut x480: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x479, &mut x480, x463, 0xea53fa95);
    let mut x481: u32 = 0;
    let mut x482: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x481, &mut x482, x479, 0xffffffff);
    let mut x483: u32 = 0;
    let mut x484: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x483, &mut x484, x479, 0xffffffff);
    let mut x485: u32 = 0;
    let mut x486: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x485, &mut x486, x479, 0xffffffff);
    let mut x487: u32 = 0;
    let mut x488: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x487, &mut x488, x479, 0xffffffff);
    let mut x489: u32 = 0;
    let mut x490: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x489, &mut x490, x479, 0xffffffff);
    let mut x491: u32 = 0;
    let mut x492: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x491, &mut x492, x479, 0xffffffff);
    let mut x493: u32 = 0;
    let mut x494: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x493, &mut x494, x479, 0xffffffff);
    let mut x495: u32 = 0;
    let mut x496: u32 = 0;
    fiat_bignp256_mulx_u32(&mut x495, &mut x496, x479, 0xffffff43);
    let mut x497: u32 = 0;
    let mut x498: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x497, &mut x498, 0x0, x496, x493);
    let mut x499: u32 = 0;
    let mut x500: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x499, &mut x500, x498, x494, x491);
    let mut x501: u32 = 0;
    let mut x502: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x501, &mut x502, x500, x492, x489);
    let mut x503: u32 = 0;
    let mut x504: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x503, &mut x504, x502, x490, x487);
    let mut x505: u32 = 0;
    let mut x506: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x505, &mut x506, x504, x488, x485);
    let mut x507: u32 = 0;
    let mut x508: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x507, &mut x508, x506, x486, x483);
    let mut x509: u32 = 0;
    let mut x510: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x509, &mut x510, x508, x484, x481);
    let mut x511: u32 = 0;
    let mut x512: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x511, &mut x512, 0x0, x463, x495);
    let mut x513: u32 = 0;
    let mut x514: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x513, &mut x514, x512, x465, x497);
    let mut x515: u32 = 0;
    let mut x516: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x515, &mut x516, x514, x467, x499);
    let mut x517: u32 = 0;
    let mut x518: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x517, &mut x518, x516, x469, x501);
    let mut x519: u32 = 0;
    let mut x520: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x519, &mut x520, x518, x471, x503);
    let mut x521: u32 = 0;
    let mut x522: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x521, &mut x522, x520, x473, x505);
    let mut x523: u32 = 0;
    let mut x524: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x523, &mut x524, x522, x475, x507);
    let mut x525: u32 = 0;
    let mut x526: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x525, &mut x526, x524, x477, x509);
    let mut x527: u32 = 0;
    let mut x528: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x527,
        &mut x528,
        x526,
        ((x478 as u32) + (x460 as u32)),
        ((x510 as u32) + x482),
    );
    let mut x529: u32 = 0;
    let mut x530: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x529, &mut x530, 0x0, x513, 0xffffff43);
    let mut x531: u32 = 0;
    let mut x532: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x531, &mut x532, x530, x515, 0xffffffff);
    let mut x533: u32 = 0;
    let mut x534: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x533, &mut x534, x532, x517, 0xffffffff);
    let mut x535: u32 = 0;
    let mut x536: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x535, &mut x536, x534, x519, 0xffffffff);
    let mut x537: u32 = 0;
    let mut x538: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x537, &mut x538, x536, x521, 0xffffffff);
    let mut x539: u32 = 0;
    let mut x540: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x539, &mut x540, x538, x523, 0xffffffff);
    let mut x541: u32 = 0;
    let mut x542: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x541, &mut x542, x540, x525, 0xffffffff);
    let mut x543: u32 = 0;
    let mut x544: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x543, &mut x544, x542, x527, 0xffffffff);
    let mut x545: u32 = 0;
    let mut x546: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x545, &mut x546, x544, (x528 as u32), (0x0 as u32));
    let mut x547: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x547, x546, x529, x513);
    let mut x548: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x548, x546, x531, x515);
    let mut x549: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x549, x546, x533, x517);
    let mut x550: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x550, x546, x535, x519);
    let mut x551: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x551, x546, x537, x521);
    let mut x552: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x552, x546, x539, x523);
    let mut x553: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x553, x546, x541, x525);
    let mut x554: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x554, x546, x543, x527);
    *IndexConst(&mut out1).index_mut(0) = x547;
    *IndexConst(&mut out1).index_mut(1) = x548;
    *IndexConst(&mut out1).index_mut(2) = x549;
    *IndexConst(&mut out1).index_mut(3) = x550;
    *IndexConst(&mut out1).index_mut(4) = x551;
    *IndexConst(&mut out1).index_mut(5) = x552;
    *IndexConst(&mut out1).index_mut(6) = x553;
    *IndexConst(&mut out1).index_mut(7) = x554;
}

/// The function fiat_bignp256_selectznz is a multi-limb conditional select.
///
/// Postconditions:
///   out1 = (if arg1 = 0 then arg2 else arg3)
///
/// Input Bounds:
///   arg1: [0x0 ~> 0x1]
///   arg2: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
///   arg3: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
/// Output Bounds:
///   out1: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
#[inline]
pub const fn fiat_bignp256_selectznz(
    mut out1: &mut [u32; 8],
    arg1: fiat_bignp256_u1,
    arg2: &[u32; 8],
    arg3: &[u32; 8],
) {
    let mut x1: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x1,
        arg1,
        (*IndexConst(arg2).index(0)),
        (*IndexConst(arg3).index(0)),
    );
    let mut x2: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x2,
        arg1,
        (*IndexConst(arg2).index(1)),
        (*IndexConst(arg3).index(1)),
    );
    let mut x3: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x3,
        arg1,
        (*IndexConst(arg2).index(2)),
        (*IndexConst(arg3).index(2)),
    );
    let mut x4: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x4,
        arg1,
        (*IndexConst(arg2).index(3)),
        (*IndexConst(arg3).index(3)),
    );
    let mut x5: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x5,
        arg1,
        (*IndexConst(arg2).index(4)),
        (*IndexConst(arg3).index(4)),
    );
    let mut x6: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x6,
        arg1,
        (*IndexConst(arg2).index(5)),
        (*IndexConst(arg3).index(5)),
    );
    let mut x7: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x7,
        arg1,
        (*IndexConst(arg2).index(6)),
        (*IndexConst(arg3).index(6)),
    );
    let mut x8: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x8,
        arg1,
        (*IndexConst(arg2).index(7)),
        (*IndexConst(arg3).index(7)),
    );
    *IndexConst(&mut out1).index_mut(0) = x1;
    *IndexConst(&mut out1).index_mut(1) = x2;
    *IndexConst(&mut out1).index_mut(2) = x3;
    *IndexConst(&mut out1).index_mut(3) = x4;
    *IndexConst(&mut out1).index_mut(4) = x5;
    *IndexConst(&mut out1).index_mut(5) = x6;
    *IndexConst(&mut out1).index_mut(6) = x7;
    *IndexConst(&mut out1).index_mut(7) = x8;
}

/// The function fiat_bignp256_msat returns the saturated representation of the prime modulus.
///
/// Postconditions:
///   twos_complement_eval out1 = m
///   0 ≤ eval out1 < m
///
/// Output Bounds:
///   out1: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
#[inline]
pub const fn fiat_bignp256_msat(mut out1: &mut [u32; 9]) {
    *IndexConst(&mut out1).index_mut(0) = 0xffffff43;
    *IndexConst(&mut out1).index_mut(1) = 0xffffffff;
    *IndexConst(&mut out1).index_mut(2) = 0xffffffff;
    *IndexConst(&mut out1).index_mut(3) = 0xffffffff;
    *IndexConst(&mut out1).index_mut(4) = 0xffffffff;
    *IndexConst(&mut out1).index_mut(5) = 0xffffffff;
    *IndexConst(&mut out1).index_mut(6) = 0xffffffff;
    *IndexConst(&mut out1).index_mut(7) = 0xffffffff;
    *IndexConst(&mut out1).index_mut(8) = (0x0 as u32);
}

/// The function fiat_bignp256_divstep computes a divstep.
///
/// Preconditions:
///   0 ≤ eval arg4 < m
///   0 ≤ eval arg5 < m
/// Postconditions:
///   out1 = (if 0 < arg1 ∧ (twos_complement_eval arg3) is odd then 1 - arg1 else 1 + arg1)
///   twos_complement_eval out2 = (if 0 < arg1 ∧ (twos_complement_eval arg3) is odd then twos_complement_eval arg3 else twos_complement_eval arg2)
///   twos_complement_eval out3 = (if 0 < arg1 ∧ (twos_complement_eval arg3) is odd then ⌊(twos_complement_eval arg3 - twos_complement_eval arg2) / 2⌋ else ⌊(twos_complement_eval arg3 + (twos_complement_eval arg3 mod 2) * twos_complement_eval arg2) / 2⌋)
///   eval (from_montgomery out4) mod m = (if 0 < arg1 ∧ (twos_complement_eval arg3) is odd then (2 * eval (from_montgomery arg5)) mod m else (2 * eval (from_montgomery arg4)) mod m)
///   eval (from_montgomery out5) mod m = (if 0 < arg1 ∧ (twos_complement_eval arg3) is odd then (eval (from_montgomery arg4) - eval (from_montgomery arg4)) mod m else (eval (from_montgomery arg5) + (twos_complement_eval arg3 mod 2) * eval (from_montgomery arg4)) mod m)
///   0 ≤ eval out5 < m
///   0 ≤ eval out5 < m
///   0 ≤ eval out2 < m
///   0 ≤ eval out3 < m
///
/// Input Bounds:
///   arg1: [0x0 ~> 0xffffffff]
///   arg2: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
///   arg3: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
///   arg4: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
///   arg5: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
/// Output Bounds:
///   out1: [0x0 ~> 0xffffffff]
///   out2: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
///   out3: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
///   out4: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
///   out5: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
#[inline]
pub const fn fiat_bignp256_divstep(
    out1: &mut u32,
    mut out2: &mut [u32; 9],
    mut out3: &mut [u32; 9],
    mut out4: &mut [u32; 8],
    mut out5: &mut [u32; 8],
    arg1: u32,
    arg2: &[u32; 9],
    arg3: &[u32; 9],
    arg4: &[u32; 8],
    arg5: &[u32; 8],
) {
    let mut x1: u32 = 0;
    let mut x2: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x1, &mut x2, 0x0, (!arg1), (0x1 as u32));
    let x3: fiat_bignp256_u1 = (((x1 >> 31) as fiat_bignp256_u1)
        & (((*IndexConst(arg3).index(0)) & (0x1 as u32)) as fiat_bignp256_u1));
    let mut x4: u32 = 0;
    let mut x5: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x4, &mut x5, 0x0, (!arg1), (0x1 as u32));
    let mut x6: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x6, x3, arg1, x4);
    let mut x7: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x7,
        x3,
        (*IndexConst(arg2).index(0)),
        (*IndexConst(arg3).index(0)),
    );
    let mut x8: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x8,
        x3,
        (*IndexConst(arg2).index(1)),
        (*IndexConst(arg3).index(1)),
    );
    let mut x9: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x9,
        x3,
        (*IndexConst(arg2).index(2)),
        (*IndexConst(arg3).index(2)),
    );
    let mut x10: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x10,
        x3,
        (*IndexConst(arg2).index(3)),
        (*IndexConst(arg3).index(3)),
    );
    let mut x11: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x11,
        x3,
        (*IndexConst(arg2).index(4)),
        (*IndexConst(arg3).index(4)),
    );
    let mut x12: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x12,
        x3,
        (*IndexConst(arg2).index(5)),
        (*IndexConst(arg3).index(5)),
    );
    let mut x13: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x13,
        x3,
        (*IndexConst(arg2).index(6)),
        (*IndexConst(arg3).index(6)),
    );
    let mut x14: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x14,
        x3,
        (*IndexConst(arg2).index(7)),
        (*IndexConst(arg3).index(7)),
    );
    let mut x15: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x15,
        x3,
        (*IndexConst(arg2).index(8)),
        (*IndexConst(arg3).index(8)),
    );
    let mut x16: u32 = 0;
    let mut x17: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x16,
        &mut x17,
        0x0,
        (0x1 as u32),
        (!(*IndexConst(arg2).index(0))),
    );
    let mut x18: u32 = 0;
    let mut x19: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x18,
        &mut x19,
        x17,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(1))),
    );
    let mut x20: u32 = 0;
    let mut x21: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x20,
        &mut x21,
        x19,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(2))),
    );
    let mut x22: u32 = 0;
    let mut x23: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x22,
        &mut x23,
        x21,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(3))),
    );
    let mut x24: u32 = 0;
    let mut x25: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x24,
        &mut x25,
        x23,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(4))),
    );
    let mut x26: u32 = 0;
    let mut x27: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x26,
        &mut x27,
        x25,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(5))),
    );
    let mut x28: u32 = 0;
    let mut x29: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x28,
        &mut x29,
        x27,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(6))),
    );
    let mut x30: u32 = 0;
    let mut x31: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x30,
        &mut x31,
        x29,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(7))),
    );
    let mut x32: u32 = 0;
    let mut x33: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(
        &mut x32,
        &mut x33,
        x31,
        (0x0 as u32),
        (!(*IndexConst(arg2).index(8))),
    );
    let mut x34: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x34, x3, (*IndexConst(arg3).index(0)), x16);
    let mut x35: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x35, x3, (*IndexConst(arg3).index(1)), x18);
    let mut x36: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x36, x3, (*IndexConst(arg3).index(2)), x20);
    let mut x37: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x37, x3, (*IndexConst(arg3).index(3)), x22);
    let mut x38: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x38, x3, (*IndexConst(arg3).index(4)), x24);
    let mut x39: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x39, x3, (*IndexConst(arg3).index(5)), x26);
    let mut x40: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x40, x3, (*IndexConst(arg3).index(6)), x28);
    let mut x41: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x41, x3, (*IndexConst(arg3).index(7)), x30);
    let mut x42: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x42, x3, (*IndexConst(arg3).index(8)), x32);
    let mut x43: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x43,
        x3,
        (*IndexConst(arg4).index(0)),
        (*IndexConst(arg5).index(0)),
    );
    let mut x44: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x44,
        x3,
        (*IndexConst(arg4).index(1)),
        (*IndexConst(arg5).index(1)),
    );
    let mut x45: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x45,
        x3,
        (*IndexConst(arg4).index(2)),
        (*IndexConst(arg5).index(2)),
    );
    let mut x46: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x46,
        x3,
        (*IndexConst(arg4).index(3)),
        (*IndexConst(arg5).index(3)),
    );
    let mut x47: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x47,
        x3,
        (*IndexConst(arg4).index(4)),
        (*IndexConst(arg5).index(4)),
    );
    let mut x48: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x48,
        x3,
        (*IndexConst(arg4).index(5)),
        (*IndexConst(arg5).index(5)),
    );
    let mut x49: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x49,
        x3,
        (*IndexConst(arg4).index(6)),
        (*IndexConst(arg5).index(6)),
    );
    let mut x50: u32 = 0;
    fiat_bignp256_cmovznz_u32(
        &mut x50,
        x3,
        (*IndexConst(arg4).index(7)),
        (*IndexConst(arg5).index(7)),
    );
    let mut x51: u32 = 0;
    let mut x52: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x51, &mut x52, 0x0, x43, x43);
    let mut x53: u32 = 0;
    let mut x54: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x53, &mut x54, x52, x44, x44);
    let mut x55: u32 = 0;
    let mut x56: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x55, &mut x56, x54, x45, x45);
    let mut x57: u32 = 0;
    let mut x58: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x57, &mut x58, x56, x46, x46);
    let mut x59: u32 = 0;
    let mut x60: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x59, &mut x60, x58, x47, x47);
    let mut x61: u32 = 0;
    let mut x62: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x61, &mut x62, x60, x48, x48);
    let mut x63: u32 = 0;
    let mut x64: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x63, &mut x64, x62, x49, x49);
    let mut x65: u32 = 0;
    let mut x66: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x65, &mut x66, x64, x50, x50);
    let mut x67: u32 = 0;
    let mut x68: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x67, &mut x68, 0x0, x51, 0xffffff43);
    let mut x69: u32 = 0;
    let mut x70: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x69, &mut x70, x68, x53, 0xffffffff);
    let mut x71: u32 = 0;
    let mut x72: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x71, &mut x72, x70, x55, 0xffffffff);
    let mut x73: u32 = 0;
    let mut x74: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x73, &mut x74, x72, x57, 0xffffffff);
    let mut x75: u32 = 0;
    let mut x76: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x75, &mut x76, x74, x59, 0xffffffff);
    let mut x77: u32 = 0;
    let mut x78: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x77, &mut x78, x76, x61, 0xffffffff);
    let mut x79: u32 = 0;
    let mut x80: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x79, &mut x80, x78, x63, 0xffffffff);
    let mut x81: u32 = 0;
    let mut x82: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x81, &mut x82, x80, x65, 0xffffffff);
    let mut x83: u32 = 0;
    let mut x84: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x83, &mut x84, x82, (x66 as u32), (0x0 as u32));
    let x85: u32 = (*IndexConst(arg4).index(7));
    let x86: u32 = (*IndexConst(arg4).index(6));
    let x87: u32 = (*IndexConst(arg4).index(5));
    let x88: u32 = (*IndexConst(arg4).index(4));
    let x89: u32 = (*IndexConst(arg4).index(3));
    let x90: u32 = (*IndexConst(arg4).index(2));
    let x91: u32 = (*IndexConst(arg4).index(1));
    let x92: u32 = (*IndexConst(arg4).index(0));
    let mut x93: u32 = 0;
    let mut x94: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x93, &mut x94, 0x0, (0x0 as u32), x92);
    let mut x95: u32 = 0;
    let mut x96: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x95, &mut x96, x94, (0x0 as u32), x91);
    let mut x97: u32 = 0;
    let mut x98: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x97, &mut x98, x96, (0x0 as u32), x90);
    let mut x99: u32 = 0;
    let mut x100: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x99, &mut x100, x98, (0x0 as u32), x89);
    let mut x101: u32 = 0;
    let mut x102: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x101, &mut x102, x100, (0x0 as u32), x88);
    let mut x103: u32 = 0;
    let mut x104: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x103, &mut x104, x102, (0x0 as u32), x87);
    let mut x105: u32 = 0;
    let mut x106: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x105, &mut x106, x104, (0x0 as u32), x86);
    let mut x107: u32 = 0;
    let mut x108: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x107, &mut x108, x106, (0x0 as u32), x85);
    let mut x109: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x109, x108, (0x0 as u32), 0xffffffff);
    let mut x110: u32 = 0;
    let mut x111: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x110, &mut x111, 0x0, x93, (x109 & 0xffffff43));
    let mut x112: u32 = 0;
    let mut x113: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x112, &mut x113, x111, x95, x109);
    let mut x114: u32 = 0;
    let mut x115: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x114, &mut x115, x113, x97, x109);
    let mut x116: u32 = 0;
    let mut x117: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x116, &mut x117, x115, x99, x109);
    let mut x118: u32 = 0;
    let mut x119: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x118, &mut x119, x117, x101, x109);
    let mut x120: u32 = 0;
    let mut x121: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x120, &mut x121, x119, x103, x109);
    let mut x122: u32 = 0;
    let mut x123: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x122, &mut x123, x121, x105, x109);
    let mut x124: u32 = 0;
    let mut x125: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x124, &mut x125, x123, x107, x109);
    let mut x126: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x126, x3, (*IndexConst(arg5).index(0)), x110);
    let mut x127: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x127, x3, (*IndexConst(arg5).index(1)), x112);
    let mut x128: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x128, x3, (*IndexConst(arg5).index(2)), x114);
    let mut x129: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x129, x3, (*IndexConst(arg5).index(3)), x116);
    let mut x130: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x130, x3, (*IndexConst(arg5).index(4)), x118);
    let mut x131: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x131, x3, (*IndexConst(arg5).index(5)), x120);
    let mut x132: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x132, x3, (*IndexConst(arg5).index(6)), x122);
    let mut x133: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x133, x3, (*IndexConst(arg5).index(7)), x124);
    let x134: fiat_bignp256_u1 = ((x34 & (0x1 as u32)) as fiat_bignp256_u1);
    let mut x135: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x135, x134, (0x0 as u32), x7);
    let mut x136: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x136, x134, (0x0 as u32), x8);
    let mut x137: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x137, x134, (0x0 as u32), x9);
    let mut x138: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x138, x134, (0x0 as u32), x10);
    let mut x139: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x139, x134, (0x0 as u32), x11);
    let mut x140: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x140, x134, (0x0 as u32), x12);
    let mut x141: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x141, x134, (0x0 as u32), x13);
    let mut x142: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x142, x134, (0x0 as u32), x14);
    let mut x143: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x143, x134, (0x0 as u32), x15);
    let mut x144: u32 = 0;
    let mut x145: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x144, &mut x145, 0x0, x34, x135);
    let mut x146: u32 = 0;
    let mut x147: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x146, &mut x147, x145, x35, x136);
    let mut x148: u32 = 0;
    let mut x149: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x148, &mut x149, x147, x36, x137);
    let mut x150: u32 = 0;
    let mut x151: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x150, &mut x151, x149, x37, x138);
    let mut x152: u32 = 0;
    let mut x153: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x152, &mut x153, x151, x38, x139);
    let mut x154: u32 = 0;
    let mut x155: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x154, &mut x155, x153, x39, x140);
    let mut x156: u32 = 0;
    let mut x157: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x156, &mut x157, x155, x40, x141);
    let mut x158: u32 = 0;
    let mut x159: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x158, &mut x159, x157, x41, x142);
    let mut x160: u32 = 0;
    let mut x161: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x160, &mut x161, x159, x42, x143);
    let mut x162: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x162, x134, (0x0 as u32), x43);
    let mut x163: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x163, x134, (0x0 as u32), x44);
    let mut x164: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x164, x134, (0x0 as u32), x45);
    let mut x165: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x165, x134, (0x0 as u32), x46);
    let mut x166: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x166, x134, (0x0 as u32), x47);
    let mut x167: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x167, x134, (0x0 as u32), x48);
    let mut x168: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x168, x134, (0x0 as u32), x49);
    let mut x169: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x169, x134, (0x0 as u32), x50);
    let mut x170: u32 = 0;
    let mut x171: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x170, &mut x171, 0x0, x126, x162);
    let mut x172: u32 = 0;
    let mut x173: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x172, &mut x173, x171, x127, x163);
    let mut x174: u32 = 0;
    let mut x175: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x174, &mut x175, x173, x128, x164);
    let mut x176: u32 = 0;
    let mut x177: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x176, &mut x177, x175, x129, x165);
    let mut x178: u32 = 0;
    let mut x179: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x178, &mut x179, x177, x130, x166);
    let mut x180: u32 = 0;
    let mut x181: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x180, &mut x181, x179, x131, x167);
    let mut x182: u32 = 0;
    let mut x183: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x182, &mut x183, x181, x132, x168);
    let mut x184: u32 = 0;
    let mut x185: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x184, &mut x185, x183, x133, x169);
    let mut x186: u32 = 0;
    let mut x187: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x186, &mut x187, 0x0, x170, 0xffffff43);
    let mut x188: u32 = 0;
    let mut x189: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x188, &mut x189, x187, x172, 0xffffffff);
    let mut x190: u32 = 0;
    let mut x191: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x190, &mut x191, x189, x174, 0xffffffff);
    let mut x192: u32 = 0;
    let mut x193: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x192, &mut x193, x191, x176, 0xffffffff);
    let mut x194: u32 = 0;
    let mut x195: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x194, &mut x195, x193, x178, 0xffffffff);
    let mut x196: u32 = 0;
    let mut x197: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x196, &mut x197, x195, x180, 0xffffffff);
    let mut x198: u32 = 0;
    let mut x199: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x198, &mut x199, x197, x182, 0xffffffff);
    let mut x200: u32 = 0;
    let mut x201: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x200, &mut x201, x199, x184, 0xffffffff);
    let mut x202: u32 = 0;
    let mut x203: fiat_bignp256_u1 = 0;
    fiat_bignp256_subborrowx_u32(&mut x202, &mut x203, x201, (x185 as u32), (0x0 as u32));
    let mut x204: u32 = 0;
    let mut x205: fiat_bignp256_u1 = 0;
    fiat_bignp256_addcarryx_u32(&mut x204, &mut x205, 0x0, x6, (0x1 as u32));
    let x206: u32 = ((x144 >> 1) | ((x146 << 31) & 0xffffffff));
    let x207: u32 = ((x146 >> 1) | ((x148 << 31) & 0xffffffff));
    let x208: u32 = ((x148 >> 1) | ((x150 << 31) & 0xffffffff));
    let x209: u32 = ((x150 >> 1) | ((x152 << 31) & 0xffffffff));
    let x210: u32 = ((x152 >> 1) | ((x154 << 31) & 0xffffffff));
    let x211: u32 = ((x154 >> 1) | ((x156 << 31) & 0xffffffff));
    let x212: u32 = ((x156 >> 1) | ((x158 << 31) & 0xffffffff));
    let x213: u32 = ((x158 >> 1) | ((x160 << 31) & 0xffffffff));
    let x214: u32 = ((x160 & 0x80000000) | (x160 >> 1));
    let mut x215: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x215, x84, x67, x51);
    let mut x216: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x216, x84, x69, x53);
    let mut x217: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x217, x84, x71, x55);
    let mut x218: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x218, x84, x73, x57);
    let mut x219: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x219, x84, x75, x59);
    let mut x220: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x220, x84, x77, x61);
    let mut x221: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x221, x84, x79, x63);
    let mut x222: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x222, x84, x81, x65);
    let mut x223: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x223, x203, x186, x170);
    let mut x224: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x224, x203, x188, x172);
    let mut x225: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x225, x203, x190, x174);
    let mut x226: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x226, x203, x192, x176);
    let mut x227: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x227, x203, x194, x178);
    let mut x228: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x228, x203, x196, x180);
    let mut x229: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x229, x203, x198, x182);
    let mut x230: u32 = 0;
    fiat_bignp256_cmovznz_u32(&mut x230, x203, x200, x184);
    *out1 = x204;
    *IndexConst(&mut out2).index_mut(0) = x7;
    *IndexConst(&mut out2).index_mut(1) = x8;
    *IndexConst(&mut out2).index_mut(2) = x9;
    *IndexConst(&mut out2).index_mut(3) = x10;
    *IndexConst(&mut out2).index_mut(4) = x11;
    *IndexConst(&mut out2).index_mut(5) = x12;
    *IndexConst(&mut out2).index_mut(6) = x13;
    *IndexConst(&mut out2).index_mut(7) = x14;
    *IndexConst(&mut out2).index_mut(8) = x15;
    *IndexConst(&mut out3).index_mut(0) = x206;
    *IndexConst(&mut out3).index_mut(1) = x207;
    *IndexConst(&mut out3).index_mut(2) = x208;
    *IndexConst(&mut out3).index_mut(3) = x209;
    *IndexConst(&mut out3).index_mut(4) = x210;
    *IndexConst(&mut out3).index_mut(5) = x211;
    *IndexConst(&mut out3).index_mut(6) = x212;
    *IndexConst(&mut out3).index_mut(7) = x213;
    *IndexConst(&mut out3).index_mut(8) = x214;
    *IndexConst(&mut out4).index_mut(0) = x215;
    *IndexConst(&mut out4).index_mut(1) = x216;
    *IndexConst(&mut out4).index_mut(2) = x217;
    *IndexConst(&mut out4).index_mut(3) = x218;
    *IndexConst(&mut out4).index_mut(4) = x219;
    *IndexConst(&mut out4).index_mut(5) = x220;
    *IndexConst(&mut out4).index_mut(6) = x221;
    *IndexConst(&mut out4).index_mut(7) = x222;
    *IndexConst(&mut out5).index_mut(0) = x223;
    *IndexConst(&mut out5).index_mut(1) = x224;
    *IndexConst(&mut out5).index_mut(2) = x225;
    *IndexConst(&mut out5).index_mut(3) = x226;
    *IndexConst(&mut out5).index_mut(4) = x227;
    *IndexConst(&mut out5).index_mut(5) = x228;
    *IndexConst(&mut out5).index_mut(6) = x229;
    *IndexConst(&mut out5).index_mut(7) = x230;
}

/// The function fiat_bignp256_divstep_precomp returns the precomputed value for Bernstein-Yang-inversion (in montgomery form).
///
/// Postconditions:
///   eval (from_montgomery out1) = ⌊(m - 1) / 2⌋^(if ⌊log2 m⌋ + 1 < 46 then ⌊(49 * (⌊log2 m⌋ + 1) + 80) / 17⌋ else ⌊(49 * (⌊log2 m⌋ + 1) + 57) / 17⌋)
///   0 ≤ eval out1 < m
///
/// Output Bounds:
///   out1: [[0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff], [0x0 ~> 0xffffffff]]
#[inline]
pub const fn fiat_bignp256_divstep_precomp(mut out1: &mut [u32; 8]) {
    *IndexConst(&mut out1).index_mut(0) = 0x127f51fe;
    *IndexConst(&mut out1).index_mut(1) = 0x7ea454d3;
    *IndexConst(&mut out1).index_mut(2) = 0x5546a7f1;
    *IndexConst(&mut out1).index_mut(3) = 0x4802b1d;
    *IndexConst(&mut out1).index_mut(4) = 0x495d722c;
    *IndexConst(&mut out1).index_mut(5) = 0xab83282b;
    *IndexConst(&mut out1).index_mut(6) = 0x12f2d964;
    *IndexConst(&mut out1).index_mut(7) = 0xdb33014c;
}