milksad
/
rust-bitcoin-unsafe-fast
14
0
Fork 0
Code Issues Pull Requests Activity

chacha20_poly1305: swap tuple for array 

* While perhaps a small performance gain, < 1%, this conforms to the
style used in the rest of the module.
This commit is contained in:
Nick Johnson 2025-02-19 10:55:25 -08:00
parent dadd1d7224
commit 33dc1b95fa
No known key found for this signature in database
GPG Key ID: 97B34267D0DBC8BF
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
chacha20_poly1305/src/chacha20.rs
View File

@ -177,7 +177,7 @@ impl State {
/// Four quarter rounds performed on the entire state of the cipher in a vectorized SIMD friendly fashion. /// Four quarter rounds performed on the entire state of the cipher in a vectorized SIMD friendly fashion.
#[inline(always)] #[inline(always)]
fn quarter_round(a: U32x4, b: U32x4, c: U32x4, d: U32x4) -> (U32x4, U32x4, U32x4, U32x4) { fn quarter_round(a: U32x4, b: U32x4, c: U32x4, d: U32x4) -> [U32x4; 4] {
let a = a.wrapping_add(b); let a = a.wrapping_add(b);
let d = d.bitxor(a).rotate_left(16); let d = d.bitxor(a).rotate_left(16);
@ -190,7 +190,7 @@ impl State {
let c = c.wrapping_add(d); let c = c.wrapping_add(d);
let b = b.bitxor(c).rotate_left(7); let b = b.bitxor(c).rotate_left(7);
(a, b, c, d) [a, b, c, d]
} }
/// Perform a round on "columns" and then "diagonals" of the state. /// Perform a round on "columns" and then "diagonals" of the state.
@ -207,13 +207,13 @@ impl State {
let [mut a, mut b, mut c, mut d] = state; let [mut a, mut b, mut c, mut d] = state;
// Column round. // Column round.
(a, b, c, d) = Self::quarter_round(a, b, c, d); [a, b, c, d] = Self::quarter_round(a, b, c, d);
// Diagonal round (with rotations). // Diagonal round (with rotations).
b = b.rotate_elements_left::<1>(); b = b.rotate_elements_left::<1>();
c = c.rotate_elements_left::<2>(); c = c.rotate_elements_left::<2>();
d = d.rotate_elements_left::<3>(); d = d.rotate_elements_left::<3>();
(a, b, c, d) = Self::quarter_round(a, b, c, d); [a, b, c, d] = Self::quarter_round(a, b, c, d);
// Rotate the words back into their normal positions. // Rotate the words back into their normal positions.
b = b.rotate_elements_right::<1>(); b = b.rotate_elements_right::<1>();
c = c.rotate_elements_right::<2>(); c = c.rotate_elements_right::<2>();