/rust/registry/src/index.crates.io-1949cf8c6b5b557f/crypto-bigint-0.5.5/src/limb/shl.rs
Line | Count | Source |
1 | | //! Limb left bitshift |
2 | | |
3 | | use crate::{Limb, Word}; |
4 | | use core::ops::{Shl, ShlAssign}; |
5 | | |
6 | | impl Limb { |
7 | | /// Computes `self << rhs`. |
8 | | /// Panics if `rhs` overflows `Limb::BITS`. |
9 | | #[inline(always)] |
10 | 0 | pub const fn shl(self, rhs: Self) -> Self { |
11 | 0 | Limb(self.0 << rhs.0) |
12 | 0 | } |
13 | | } |
14 | | |
15 | | impl Shl for Limb { |
16 | | type Output = Self; |
17 | | |
18 | | #[inline(always)] |
19 | 0 | fn shl(self, rhs: Self) -> Self::Output { |
20 | 0 | self.shl(rhs) |
21 | 0 | } |
22 | | } |
23 | | |
24 | | impl Shl<usize> for Limb { |
25 | | type Output = Self; |
26 | | |
27 | | #[inline(always)] |
28 | 0 | fn shl(self, rhs: usize) -> Self::Output { |
29 | 0 | self.shl(Limb(rhs as Word)) |
30 | 0 | } |
31 | | } |
32 | | |
33 | | impl ShlAssign for Limb { |
34 | | #[inline(always)] |
35 | 0 | fn shl_assign(&mut self, other: Self) { |
36 | 0 | *self = self.shl(other); |
37 | 0 | } |
38 | | } |
39 | | |
40 | | impl ShlAssign<usize> for Limb { |
41 | | #[inline(always)] |
42 | 0 | fn shl_assign(&mut self, other: usize) { |
43 | 0 | *self = self.shl(Limb(other as Word)); |
44 | 0 | } |
45 | | } |
46 | | |
47 | | #[cfg(test)] |
48 | | mod tests { |
49 | | use crate::Limb; |
50 | | |
51 | | #[test] |
52 | | fn shl1() { |
53 | | assert_eq!(Limb(1) << 1, Limb(2)); |
54 | | } |
55 | | |
56 | | #[test] |
57 | | fn shl2() { |
58 | | assert_eq!(Limb(1) << 2, Limb(4)); |
59 | | } |
60 | | |
61 | | #[test] |
62 | | fn shl_assign1() { |
63 | | let mut l = Limb(1); |
64 | | l <<= 1; |
65 | | assert_eq!(l, Limb(2)); |
66 | | } |
67 | | |
68 | | #[test] |
69 | | fn shl_assign2() { |
70 | | let mut l = Limb(1); |
71 | | l <<= 2; |
72 | | assert_eq!(l, Limb(4)); |
73 | | } |
74 | | } |