crypto_bigint/uint/
bit_not.rs

1//! [`Uint`] bitwise not operations.
2
3use super::Uint;
4use crate::{Limb, Wrapping};
5use core::ops::Not;
6
7impl<const LIMBS: usize> Uint<LIMBS> {
8    /// Computes bitwise `!a`.
9    #[inline(always)]
10    pub const fn not(&self) -> Self {
11        let mut limbs = [Limb::ZERO; LIMBS];
12        let mut i = 0;
13
14        while i < LIMBS {
15            limbs[i] = self.limbs[i].not();
16            i += 1;
17        }
18
19        Self { limbs }
20    }
21}
22
23impl<const LIMBS: usize> Not for Uint<LIMBS> {
24    type Output = Self;
25
26    #[allow(clippy::needless_borrow)]
27    fn not(self) -> <Self as Not>::Output {
28        (&self).not()
29    }
30}
31
32impl<const LIMBS: usize> Not for Wrapping<Uint<LIMBS>> {
33    type Output = Self;
34
35    fn not(self) -> <Self as Not>::Output {
36        Wrapping(self.0.not())
37    }
38}
39
40#[cfg(test)]
41mod tests {
42    use crate::U128;
43
44    #[test]
45    fn bitnot_ok() {
46        assert_eq!(U128::ZERO.not(), U128::MAX);
47        assert_eq!(U128::MAX.not(), U128::ZERO);
48    }
49}
crypto_bigint/uint/bit_not.rs

crypto_bigint/uint/
bit_not.rs
