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use awint_internals::*;
use crate::Bits;
impl Bits {
pub const fn short_cin_mul(&mut self, cin: usize, rhs: usize) -> usize {
let mut carry = cin;
for_each_mut!(
self,
x,
{
let tmp = widen_mul_add(*x, rhs, carry);
*x = tmp.0;
carry = tmp.1;
},
false
);
let oflow = if self.extra() == 0 {
carry
} else {
(self.last() >> self.extra()) | (carry << (BITS - self.extra()))
};
self.clear_unused_bits();
oflow
}
pub const fn short_mul_add_triop(&mut self, lhs: &Self, rhs: usize) -> Option<bool> {
let mut mul_carry = 0;
let mut add_carry = 0;
binop_for_each_mut!(
self,
lhs,
self_x,
lhs_x,
{
let tmp0 = widen_mul_add(lhs_x, rhs, mul_carry);
mul_carry = tmp0.1;
let tmp1 = widen_add(*self_x, tmp0.0, add_carry);
add_carry = tmp1.1;
*self_x = tmp1.0;
},
true
);
Some((mul_carry != 0) || (add_carry != 0))
}
pub const fn mul_add_triop(&mut self, lhs: &Self, rhs: &Self) -> Option<()> {
if self.bw() != lhs.bw() || self.bw() != rhs.bw() {
return None
}
unsafe {
const_for!(lhs_i in {0..self.len()} {
let mut carry0 = 0;
let mut carry1 = 0;
const_for!(rhs_i in {0..(self.len() - lhs_i)} {
let tmp0 =
widen_mul_add(lhs.get_unchecked(lhs_i), rhs.get_unchecked(rhs_i), carry0);
carry0 = tmp0.1;
let tmp1 = widen_add(self.get_unchecked(lhs_i + rhs_i), tmp0.0, carry1);
carry1 = tmp1.1;
*self.get_unchecked_mut(lhs_i + rhs_i) = tmp1.0;
});
});
}
self.clear_unused_bits();
Some(())
}
}