#![no_std]
#![allow(non_upper_case_globals)]
const PLEN: usize = 25;
const RHO: [u32; 24] = [
1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14, 27, 41, 56, 8, 25, 43, 62, 18,
39, 61, 20, 44,
];
const PI: [usize; 24] = [
10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4, 15, 23, 19, 13, 12, 2, 20, 14,
22, 9, 6, 1,
];
const RC: [u64; 24] = [
0x0000000000000001,
0x0000000000008082,
0x800000000000808a,
0x8000000080008000,
0x000000000000808b,
0x0000000080000001,
0x8000000080008081,
0x8000000000008009,
0x000000000000008a,
0x0000000000000088,
0x0000000080008009,
0x000000008000000a,
0x000000008000808b,
0x800000000000008b,
0x8000000000008089,
0x8000000000008003,
0x8000000000008002,
0x8000000000000080,
0x000000000000800a,
0x800000008000000a,
0x8000000080008081,
0x8000000000008080,
0x0000000080000001,
0x8000000080008008,
];
#[cfg(not(feature = "no_unroll"))]
macro_rules! unroll5 {
($var:ident, $body:block) => {
{ const $var: usize = 0; $body; }
{ const $var: usize = 1; $body; }
{ const $var: usize = 2; $body; }
{ const $var: usize = 3; $body; }
{ const $var: usize = 4; $body; }
};
}
#[cfg(feature = "no_unroll")]
macro_rules! unroll5 {
($var:ident, $body:block) => {
for $var in 0..5 $body
}
}
#[cfg(not(feature = "no_unroll"))]
macro_rules! unroll24 {
($var: ident, $body: block) => {
{ const $var: usize = 0; $body; }
{ const $var: usize = 1; $body; }
{ const $var: usize = 2; $body; }
{ const $var: usize = 3; $body; }
{ const $var: usize = 4; $body; }
{ const $var: usize = 5; $body; }
{ const $var: usize = 6; $body; }
{ const $var: usize = 7; $body; }
{ const $var: usize = 8; $body; }
{ const $var: usize = 9; $body; }
{ const $var: usize = 10; $body; }
{ const $var: usize = 11; $body; }
{ const $var: usize = 12; $body; }
{ const $var: usize = 13; $body; }
{ const $var: usize = 14; $body; }
{ const $var: usize = 15; $body; }
{ const $var: usize = 16; $body; }
{ const $var: usize = 17; $body; }
{ const $var: usize = 18; $body; }
{ const $var: usize = 19; $body; }
{ const $var: usize = 20; $body; }
{ const $var: usize = 21; $body; }
{ const $var: usize = 22; $body; }
{ const $var: usize = 23; $body; }
};
}
#[cfg(feature = "no_unroll")]
macro_rules! unroll24 {
($var:ident, $body:block) => {
for $var in 0..24 $body
}
}
#[allow(unused_assignments)]
pub fn f1600(a: &mut [u64; PLEN]) {
let mut arrays: [[u64; 5]; 24] = [[0; 5]; 24];
for i in 0..24 {
unroll5!(x, {
arrays[i][x] = 0;
unroll5!(y, {
arrays[i][x] ^= a[5 * y + x];
});
});
unroll5!(x, {
unroll5!(y, {
let t1 = arrays[i][(x + 4) % 5];
let t2 = arrays[i][(x + 1) % 5].rotate_left(1);
a[5 * y + x] ^= t1 ^ t2;
});
});
let mut last = a[1];
unroll24!(x, {
arrays[i][0] = a[PI[x]];
a[PI[x]] = last.rotate_left(RHO[x]);
last = arrays[i][0];
});
unroll5!(y_step, {
let y = 5 * y_step;
unroll5!(x, {
arrays[i][x] = a[y + x];
});
unroll5!(x, {
let t1 = !arrays[i][(x + 1) % 5];
let t2 = arrays[i][(x + 2) % 5];
a[y + x] = arrays[i][x] ^ (t1 & t2);
});
});
a[0] ^= RC[i];
}
}