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perf: use bitwise operations in add/sub impls #407

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merged 1 commit into from
Dec 4, 2024
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perf: use bitwise operations in add/sub impls #407

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4 changes: 2 additions & 2 deletions src/add.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,7 @@ impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS> {
const fn u64_carrying_add(lhs: u64, rhs: u64, carry: bool) -> (u64, bool) {
let (a, b) = lhs.overflowing_add(rhs);
let (c, d) = a.overflowing_add(carry as u64);
(c, b || d)
(c, b | d)
}

if BITS == 0 {
Expand Down Expand Up @@ -103,7 +103,7 @@ impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS> {
const fn u64_borrowing_sub(lhs: u64, rhs: u64, borrow: bool) -> (u64, bool) {
let (a, b) = lhs.overflowing_sub(rhs);
let (c, d) = a.overflowing_sub(borrow as u64);
(c, b || d)
(c, b | d)
}

if BITS == 0 {
Expand Down
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