blake3/
ffi_sse41.rs

1use crate::{CVWords, IncrementCounter, BLOCK_LEN, OUT_LEN};
2
3// Unsafe because this may only be called on platforms supporting SSE4.1.
4pub unsafe fn compress_in_place(
5    cv: &mut CVWords,
6    block: &[u8; BLOCK_LEN],
7    block_len: u8,
8    counter: u64,
9    flags: u8,
10) {
11    ffi::blake3_compress_in_place_sse41(cv.as_mut_ptr(), block.as_ptr(), block_len, counter, flags)
12}
13
14// Unsafe because this may only be called on platforms supporting SSE4.1.
15pub unsafe fn compress_xof(
16    cv: &CVWords,
17    block: &[u8; BLOCK_LEN],
18    block_len: u8,
19    counter: u64,
20    flags: u8,
21) -> [u8; 64] {
22    let mut out = [0u8; 64];
23    ffi::blake3_compress_xof_sse41(
24        cv.as_ptr(),
25        block.as_ptr(),
26        block_len,
27        counter,
28        flags,
29        out.as_mut_ptr(),
30    );
31    out
32}
33
34// Unsafe because this may only be called on platforms supporting SSE4.1.
35pub unsafe fn hash_many<const N: usize>(
36    inputs: &[&[u8; N]],
37    key: &CVWords,
38    counter: u64,
39    increment_counter: IncrementCounter,
40    flags: u8,
41    flags_start: u8,
42    flags_end: u8,
43    out: &mut [u8],
44) {
45    // The Rust hash_many implementations do bounds checking on the `out`
46    // array, but the C implementations don't. Even though this is an unsafe
47    // function, assert the bounds here.
48    assert!(out.len() >= inputs.len() * OUT_LEN);
49    ffi::blake3_hash_many_sse41(
50        inputs.as_ptr() as *const *const u8,
51        inputs.len(),
52        N / BLOCK_LEN,
53        key.as_ptr(),
54        counter,
55        increment_counter.yes(),
56        flags,
57        flags_start,
58        flags_end,
59        out.as_mut_ptr(),
60    )
61}
62
63pub mod ffi {
64    extern "C" {
65        pub fn blake3_compress_in_place_sse41(
66            cv: *mut u32,
67            block: *const u8,
68            block_len: u8,
69            counter: u64,
70            flags: u8,
71        );
72        pub fn blake3_compress_xof_sse41(
73            cv: *const u32,
74            block: *const u8,
75            block_len: u8,
76            counter: u64,
77            flags: u8,
78            out: *mut u8,
79        );
80        pub fn blake3_hash_many_sse41(
81            inputs: *const *const u8,
82            num_inputs: usize,
83            blocks: usize,
84            key: *const u32,
85            counter: u64,
86            increment_counter: bool,
87            flags: u8,
88            flags_start: u8,
89            flags_end: u8,
90            out: *mut u8,
91        );
92    }
93}
94
95#[cfg(test)]
96mod test {
97    use super::*;
98
99    #[test]
100    fn test_compress() {
101        if !crate::platform::sse41_detected() {
102            return;
103        }
104        crate::test::test_compress_fn(compress_in_place, compress_xof);
105    }
106
107    #[test]
108    fn test_hash_many() {
109        if !crate::platform::sse41_detected() {
110            return;
111        }
112        crate::test::test_hash_many_fn(hash_many, hash_many);
113    }
114}
blake3/ffi_sse41.rs

blake3/
ffi_sse41.rs
