/* This file is part of limb https://lila.oss/limb
* Copyright (C) 2023 Olivier Brunel jjk@jjacky.com */
/* Based on official BLAKE3 implementation:
* https://github.com/BLAKE3-team/BLAKE3
* Copyright (C) 2019-2020 Samuel Neves and Jack O'Connor */
/* SPDX-License-Identifier: CC0-1.0 OR Apache-2.0 */
#include "blake3.h"
#include <immintrin.h>
#define DEGREE 4
#define _mm_shuffle_ps2(a, b, c) \
(_mm_castps_si128( \
_mm_shuffle_ps(_mm_castsi128_ps(a), _mm_castsi128_ps(b), (c))))
INLINE __m128i loadu(const u8 src[16]) {
return _mm_loadu_si128((const __m128i *)src);
}
INLINE void storeu(__m128i src, u8 dest[16]) {
_mm_storeu_si128((__m128i *)dest, src);
}
INLINE __m128i addv(__m128i a, __m128i b) { return _mm_add_epi32(a, b); }
// Note that clang-format doesn't like the name "xor" for some reason.
INLINE __m128i xorv(__m128i a, __m128i b) { return _mm_xor_si128(a, b); }
INLINE __m128i set1(u32 x) { return _mm_set1_epi32((int32_t)x); }
INLINE __m128i set4(u32 a, u32 b, u32 c, u32 d) {
return _mm_setr_epi32((int32_t)a, (int32_t)b, (int32_t)c, (int32_t)d);
}
INLINE __m128i rot16(__m128i x) {
return _mm_shuffle_epi8(
x, _mm_set_epi8(13, 12, 15, 14, 9, 8, 11, 10, 5, 4, 7, 6, 1, 0, 3, 2));
}
INLINE __m128i rot12(__m128i x) {
return xorv(_mm_srli_epi32(x, 12), _mm_slli_epi32(x, 32 - 12));
}
INLINE __m128i rot8(__m128i x) {
return _mm_shuffle_epi8(
x, _mm_set_epi8(12, 15, 14, 13, 8, 11, 10, 9, 4, 7, 6, 5, 0, 3, 2, 1));
}
INLINE __m128i rot7(__m128i x) {
return xorv(_mm_srli_epi32(x, 7), _mm_slli_epi32(x, 32 - 7));
}
INLINE void g1(__m128i *row0, __m128i *row1, __m128i *row2, __m128i *row3,
__m128i m) {
*row0 = addv(addv(*row0, m), *row1);
*row3 = xorv(*row3, *row0);
*row3 = rot16(*row3);
*row2 = addv(*row2, *row3);
*row1 = xorv(*row1, *row2);
*row1 = rot12(*row1);
}
INLINE void g2(__m128i *row0, __m128i *row1, __m128i *row2, __m128i *row3,
__m128i m) {
*row0 = addv(addv(*row0, m), *row1);
*row3 = xorv(*row3, *row0);
*row3 = rot8(*row3);
*row2 = addv(*row2, *row3);
*row1 = xorv(*row1, *row2);
*row1 = rot7(*row1);
}
// Note the optimization here of leaving row1 as the unrotated row, rather than
// row0. All the message loads below are adjusted to compensate for this. See
// discussion at https://github.com/sneves/blake2-avx2/pull/4
INLINE void diagonalize(__m128i *row0, __m128i *row2, __m128i *row3) {
*row0 = _mm_shuffle_epi32(*row0, _MM_SHUFFLE(2, 1, 0, 3));
*row3 = _mm_shuffle_epi32(*row3, _MM_SHUFFLE(1, 0, 3, 2));
*row2 = _mm_shuffle_epi32(*row2, _MM_SHUFFLE(0, 3, 2, 1));
}
INLINE void undiagonalize(__m128i *row0, __m128i *row2, __m128i *row3) {
*row0 = _mm_shuffle_epi32(*row0, _MM_SHUFFLE(0, 3, 2, 1));
*row3 = _mm_shuffle_epi32(*row3, _MM_SHUFFLE(1, 0, 3, 2));
*row2 = _mm_shuffle_epi32(*row2, _MM_SHUFFLE(2, 1, 0, 3));
}
INLINE void compress_pre(__m128i rows[4], const u32 cv[8],
const u8 block[BLAKE3_BLOCK_LEN],
u8 block_len, u64 counter, u8 flags) {
rows[0] = loadu((u8 *)&cv[0]);
rows[1] = loadu((u8 *)&cv[4]);
rows[2] = set4(IV[0], IV[1], IV[2], IV[3]);
rows[3] = set4(counter_low(counter), counter_high(counter),
(u32)block_len, (u32)flags);
__m128i m0 = loadu(&block[sizeof(__m128i) * 0]);
__m128i m1 = loadu(&block[sizeof(__m128i) * 1]);
__m128i m2 = loadu(&block[sizeof(__m128i) * 2]);
__m128i m3 = loadu(&block[sizeof(__m128i) * 3]);
__m128i t0, t1, t2, t3, tt;
// Round 1. The first round permutes the message words from the original
// input order, into the groups that get mixed in parallel.
t0 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(2, 0, 2, 0)); // 6 4 2 0
g1(&rows[0], &rows[1], &rows[2], &rows[3], t0);
t1 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(3, 1, 3, 1)); // 7 5 3 1
g2(&rows[0], &rows[1], &rows[2], &rows[3], t1);
diagonalize(&rows[0], &rows[2], &rows[3]);
t2 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(2, 0, 2, 0)); // 14 12 10 8
t2 = _mm_shuffle_epi32(t2, _MM_SHUFFLE(2, 1, 0, 3)); // 12 10 8 14
g1(&rows[0], &rows[1], &rows[2], &rows[3], t2);
t3 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(3, 1, 3, 1)); // 15 13 11 9
t3 = _mm_shuffle_epi32(t3, _MM_SHUFFLE(2, 1, 0, 3)); // 13 11 9 15
g2(&rows[0], &rows[1], &rows[2], &rows[3], t3);
undiagonalize(&rows[0], &rows[2], &rows[3]);
m0 = t0;
m1 = t1;
m2 = t2;
m3 = t3;
// Round 2. This round and all following rounds apply a fixed permutation
// to the message words from the round before.
t0 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(3, 1, 1, 2));
t0 = _mm_shuffle_epi32(t0, _MM_SHUFFLE(0, 3, 2, 1));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t0);
t1 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(3, 3, 2, 2));
tt = _mm_shuffle_epi32(m0, _MM_SHUFFLE(0, 0, 3, 3));
t1 = _mm_blend_epi16(tt, t1, 0xCC);
g2(&rows[0], &rows[1], &rows[2], &rows[3], t1);
diagonalize(&rows[0], &rows[2], &rows[3]);
t2 = _mm_unpacklo_epi64(m3, m1);
tt = _mm_blend_epi16(t2, m2, 0xC0);
t2 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(1, 3, 2, 0));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t2);
t3 = _mm_unpackhi_epi32(m1, m3);
tt = _mm_unpacklo_epi32(m2, t3);
t3 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(0, 1, 3, 2));
g2(&rows[0], &rows[1], &rows[2], &rows[3], t3);
undiagonalize(&rows[0], &rows[2], &rows[3]);
m0 = t0;
m1 = t1;
m2 = t2;
m3 = t3;
// Round 3
t0 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(3, 1, 1, 2));
t0 = _mm_shuffle_epi32(t0, _MM_SHUFFLE(0, 3, 2, 1));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t0);
t1 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(3, 3, 2, 2));
tt = _mm_shuffle_epi32(m0, _MM_SHUFFLE(0, 0, 3, 3));
t1 = _mm_blend_epi16(tt, t1, 0xCC);
g2(&rows[0], &rows[1], &rows[2], &rows[3], t1);
diagonalize(&rows[0], &rows[2], &rows[3]);
t2 = _mm_unpacklo_epi64(m3, m1);
tt = _mm_blend_epi16(t2, m2, 0xC0);
t2 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(1, 3, 2, 0));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t2);
t3 = _mm_unpackhi_epi32(m1, m3);
tt = _mm_unpacklo_epi32(m2, t3);
t3 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(0, 1, 3, 2));
g2(&rows[0], &rows[1], &rows[2], &rows[3], t3);
undiagonalize(&rows[0], &rows[2], &rows[3]);
m0 = t0;
m1 = t1;
m2 = t2;
m3 = t3;
// Round 4
t0 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(3, 1, 1, 2));
t0 = _mm_shuffle_epi32(t0, _MM_SHUFFLE(0, 3, 2, 1));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t0);
t1 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(3, 3, 2, 2));
tt = _mm_shuffle_epi32(m0, _MM_SHUFFLE(0, 0, 3, 3));
t1 = _mm_blend_epi16(tt, t1, 0xCC);
g2(&rows[0], &rows[1], &rows[2], &rows[3], t1);
diagonalize(&rows[0], &rows[2], &rows[3]);
t2 = _mm_unpacklo_epi64(m3, m1);
tt = _mm_blend_epi16(t2, m2, 0xC0);
t2 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(1, 3, 2, 0));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t2);
t3 = _mm_unpackhi_epi32(m1, m3);
tt = _mm_unpacklo_epi32(m2, t3);
t3 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(0, 1, 3, 2));
g2(&rows[0], &rows[1], &rows[2], &rows[3], t3);
undiagonalize(&rows[0], &rows[2], &rows[3]);
m0 = t0;
m1 = t1;
m2 = t2;
m3 = t3;
// Round 5
t0 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(3, 1, 1, 2));
t0 = _mm_shuffle_epi32(t0, _MM_SHUFFLE(0, 3, 2, 1));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t0);
t1 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(3, 3, 2, 2));
tt = _mm_shuffle_epi32(m0, _MM_SHUFFLE(0, 0, 3, 3));
t1 = _mm_blend_epi16(tt, t1, 0xCC);
g2(&rows[0], &rows[1], &rows[2], &rows[3], t1);
diagonalize(&rows[0], &rows[2], &rows[3]);
t2 = _mm_unpacklo_epi64(m3, m1);
tt = _mm_blend_epi16(t2, m2, 0xC0);
t2 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(1, 3, 2, 0));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t2);
t3 = _mm_unpackhi_epi32(m1, m3);
tt = _mm_unpacklo_epi32(m2, t3);
t3 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(0, 1, 3, 2));
g2(&rows[0], &rows[1], &rows[2], &rows[3], t3);
undiagonalize(&rows[0], &rows[2], &rows[3]);
m0 = t0;
m1 = t1;
m2 = t2;
m3 = t3;
// Round 6
t0 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(3, 1, 1, 2));
t0 = _mm_shuffle_epi32(t0, _MM_SHUFFLE(0, 3, 2, 1));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t0);
t1 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(3, 3, 2, 2));
tt = _mm_shuffle_epi32(m0, _MM_SHUFFLE(0, 0, 3, 3));
t1 = _mm_blend_epi16(tt, t1, 0xCC);
g2(&rows[0], &rows[1], &rows[2], &rows[3], t1);
diagonalize(&rows[0], &rows[2], &rows[3]);
t2 = _mm_unpacklo_epi64(m3, m1);
tt = _mm_blend_epi16(t2, m2, 0xC0);
t2 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(1, 3, 2, 0));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t2);
t3 = _mm_unpackhi_epi32(m1, m3);
tt = _mm_unpacklo_epi32(m2, t3);
t3 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(0, 1, 3, 2));
g2(&rows[0], &rows[1], &rows[2], &rows[3], t3);
undiagonalize(&rows[0], &rows[2], &rows[3]);
m0 = t0;
m1 = t1;
m2 = t2;
m3 = t3;
// Round 7
t0 = _mm_shuffle_ps2(m0, m1, _MM_SHUFFLE(3, 1, 1, 2));
t0 = _mm_shuffle_epi32(t0, _MM_SHUFFLE(0, 3, 2, 1));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t0);
t1 = _mm_shuffle_ps2(m2, m3, _MM_SHUFFLE(3, 3, 2, 2));
tt = _mm_shuffle_epi32(m0, _MM_SHUFFLE(0, 0, 3, 3));
t1 = _mm_blend_epi16(tt, t1, 0xCC);
g2(&rows[0], &rows[1], &rows[2], &rows[3], t1);
diagonalize(&rows[0], &rows[2], &rows[3]);
t2 = _mm_unpacklo_epi64(m3, m1);
tt = _mm_blend_epi16(t2, m2, 0xC0);
t2 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(1, 3, 2, 0));
g1(&rows[0], &rows[1], &rows[2], &rows[3], t2);
t3 = _mm_unpackhi_epi32(m1, m3);
tt = _mm_unpacklo_epi32(m2, t3);
t3 = _mm_shuffle_epi32(tt, _MM_SHUFFLE(0, 1, 3, 2));
g2(&rows[0], &rows[1], &rows[2], &rows[3], t3);
undiagonalize(&rows[0], &rows[2], &rows[3]);
}
void blake3_compress_in_place_sse41(u32 cv[8],
const u8 block[BLAKE3_BLOCK_LEN],
u8 block_len, u64 counter,
u8 flags) {
__m128i rows[4];
compress_pre(rows, cv, block, block_len, counter, flags);
storeu(xorv(rows[0], rows[2]), (u8 *)&cv[0]);
storeu(xorv(rows[1], rows[3]), (u8 *)&cv[4]);
}
void blake3_compress_xof_sse41(const u32 cv[8],
const u8 block[BLAKE3_BLOCK_LEN],
u8 block_len, u64 counter,
u8 flags, u8 out[64]) {
__m128i rows[4];
compress_pre(rows, cv, block, block_len, counter, flags);
storeu(xorv(rows[0], rows[2]), &out[0]);
storeu(xorv(rows[1], rows[3]), &out[16]);
storeu(xorv(rows[2], loadu((u8 *)&cv[0])), &out[32]);
storeu(xorv(rows[3], loadu((u8 *)&cv[4])), &out[48]);
}
INLINE void round_fn(__m128i v[16], __m128i m[16], size_t r) {
v[0] = addv(v[0], m[(size_t)MSG_SCHEDULE[r][0]]);
v[1] = addv(v[1], m[(size_t)MSG_SCHEDULE[r][2]]);
v[2] = addv(v[2], m[(size_t)MSG_SCHEDULE[r][4]]);
v[3] = addv(v[3], m[(size_t)MSG_SCHEDULE[r][6]]);
v[0] = addv(v[0], v[4]);
v[1] = addv(v[1], v[5]);
v[2] = addv(v[2], v[6]);
v[3] = addv(v[3], v[7]);
v[12] = xorv(v[12], v[0]);
v[13] = xorv(v[13], v[1]);
v[14] = xorv(v[14], v[2]);
v[15] = xorv(v[15], v[3]);
v[12] = rot16(v[12]);
v[13] = rot16(v[13]);
v[14] = rot16(v[14]);
v[15] = rot16(v[15]);
v[8] = addv(v[8], v[12]);
v[9] = addv(v[9], v[13]);
v[10] = addv(v[10], v[14]);
v[11] = addv(v[11], v[15]);
v[4] = xorv(v[4], v[8]);
v[5] = xorv(v[5], v[9]);
v[6] = xorv(v[6], v[10]);
v[7] = xorv(v[7], v[11]);
v[4] = rot12(v[4]);
v[5] = rot12(v[5]);
v[6] = rot12(v[6]);
v[7] = rot12(v[7]);
v[0] = addv(v[0], m[(size_t)MSG_SCHEDULE[r][1]]);
v[1] = addv(v[1], m[(size_t)MSG_SCHEDULE[r][3]]);
v[2] = addv(v[2], m[(size_t)MSG_SCHEDULE[r][5]]);
v[3] = addv(v[3], m[(size_t)MSG_SCHEDULE[r][7]]);
v[0] = addv(v[0], v[4]);
v[1] = addv(v[1], v[5]);
v[2] = addv(v[2], v[6]);
v[3] = addv(v[3], v[7]);
v[12] = xorv(v[12], v[0]);
v[13] = xorv(v[13], v[1]);
v[14] = xorv(v[14], v[2]);
v[15] = xorv(v[15], v[3]);
v[12] = rot8(v[12]);
v[13] = rot8(v[13]);
v[14] = rot8(v[14]);
v[15] = rot8(v[15]);
v[8] = addv(v[8], v[12]);
v[9] = addv(v[9], v[13]);
v[10] = addv(v[10], v[14]);
v[11] = addv(v[11], v[15]);
v[4] = xorv(v[4], v[8]);
v[5] = xorv(v[5], v[9]);
v[6] = xorv(v[6], v[10]);
v[7] = xorv(v[7], v[11]);
v[4] = rot7(v[4]);
v[5] = rot7(v[5]);
v[6] = rot7(v[6]);
v[7] = rot7(v[7]);
v[0] = addv(v[0], m[(size_t)MSG_SCHEDULE[r][8]]);
v[1] = addv(v[1], m[(size_t)MSG_SCHEDULE[r][10]]);
v[2] = addv(v[2], m[(size_t)MSG_SCHEDULE[r][12]]);
v[3] = addv(v[3], m[(size_t)MSG_SCHEDULE[r][14]]);
v[0] = addv(v[0], v[5]);
v[1] = addv(v[1], v[6]);
v[2] = addv(v[2], v[7]);
v[3] = addv(v[3], v[4]);
v[15] = xorv(v[15], v[0]);
v[12] = xorv(v[12], v[1]);
v[13] = xorv(v[13], v[2]);
v[14] = xorv(v[14], v[3]);
v[15] = rot16(v[15]);
v[12] = rot16(v[12]);
v[13] = rot16(v[13]);
v[14] = rot16(v[14]);
v[10] = addv(v[10], v[15]);
v[11] = addv(v[11], v[12]);
v[8] = addv(v[8], v[13]);
v[9] = addv(v[9], v[14]);
v[5] = xorv(v[5], v[10]);
v[6] = xorv(v[6], v[11]);
v[7] = xorv(v[7], v[8]);
v[4] = xorv(v[4], v[9]);
v[5] = rot12(v[5]);
v[6] = rot12(v[6]);
v[7] = rot12(v[7]);
v[4] = rot12(v[4]);
v[0] = addv(v[0], m[(size_t)MSG_SCHEDULE[r][9]]);
v[1] = addv(v[1], m[(size_t)MSG_SCHEDULE[r][11]]);
v[2] = addv(v[2], m[(size_t)MSG_SCHEDULE[r][13]]);
v[3] = addv(v[3], m[(size_t)MSG_SCHEDULE[r][15]]);
v[0] = addv(v[0], v[5]);
v[1] = addv(v[1], v[6]);
v[2] = addv(v[2], v[7]);
v[3] = addv(v[3], v[4]);
v[15] = xorv(v[15], v[0]);
v[12] = xorv(v[12], v[1]);
v[13] = xorv(v[13], v[2]);
v[14] = xorv(v[14], v[3]);
v[15] = rot8(v[15]);
v[12] = rot8(v[12]);
v[13] = rot8(v[13]);
v[14] = rot8(v[14]);
v[10] = addv(v[10], v[15]);
v[11] = addv(v[11], v[12]);
v[8] = addv(v[8], v[13]);
v[9] = addv(v[9], v[14]);
v[5] = xorv(v[5], v[10]);
v[6] = xorv(v[6], v[11]);
v[7] = xorv(v[7], v[8]);
v[4] = xorv(v[4], v[9]);
v[5] = rot7(v[5]);
v[6] = rot7(v[6]);
v[7] = rot7(v[7]);
v[4] = rot7(v[4]);
}
INLINE void transpose_vecs(__m128i vecs[DEGREE]) {
// Interleave 32-bit lates. The low unpack is lanes 00/11 and the high is
// 22/33. Note that this doesn't split the vector into two lanes, as the
// AVX2 counterparts do.
__m128i ab_01 = _mm_unpacklo_epi32(vecs[0], vecs[1]);
__m128i ab_23 = _mm_unpackhi_epi32(vecs[0], vecs[1]);
__m128i cd_01 = _mm_unpacklo_epi32(vecs[2], vecs[3]);
__m128i cd_23 = _mm_unpackhi_epi32(vecs[2], vecs[3]);
// Interleave 64-bit lanes.
__m128i abcd_0 = _mm_unpacklo_epi64(ab_01, cd_01);
__m128i abcd_1 = _mm_unpackhi_epi64(ab_01, cd_01);
__m128i abcd_2 = _mm_unpacklo_epi64(ab_23, cd_23);
__m128i abcd_3 = _mm_unpackhi_epi64(ab_23, cd_23);
vecs[0] = abcd_0;
vecs[1] = abcd_1;
vecs[2] = abcd_2;
vecs[3] = abcd_3;
}
INLINE void transpose_msg_vecs(const u8 *const *inputs,
size_t block_offset, __m128i out[16]) {
out[0] = loadu(&inputs[0][block_offset + 0 * sizeof(__m128i)]);
out[1] = loadu(&inputs[1][block_offset + 0 * sizeof(__m128i)]);
out[2] = loadu(&inputs[2][block_offset + 0 * sizeof(__m128i)]);
out[3] = loadu(&inputs[3][block_offset + 0 * sizeof(__m128i)]);
out[4] = loadu(&inputs[0][block_offset + 1 * sizeof(__m128i)]);
out[5] = loadu(&inputs[1][block_offset + 1 * sizeof(__m128i)]);
out[6] = loadu(&inputs[2][block_offset + 1 * sizeof(__m128i)]);
out[7] = loadu(&inputs[3][block_offset + 1 * sizeof(__m128i)]);
out[8] = loadu(&inputs[0][block_offset + 2 * sizeof(__m128i)]);
out[9] = loadu(&inputs[1][block_offset + 2 * sizeof(__m128i)]);
out[10] = loadu(&inputs[2][block_offset + 2 * sizeof(__m128i)]);
out[11] = loadu(&inputs[3][block_offset + 2 * sizeof(__m128i)]);
out[12] = loadu(&inputs[0][block_offset + 3 * sizeof(__m128i)]);
out[13] = loadu(&inputs[1][block_offset + 3 * sizeof(__m128i)]);
out[14] = loadu(&inputs[2][block_offset + 3 * sizeof(__m128i)]);
out[15] = loadu(&inputs[3][block_offset + 3 * sizeof(__m128i)]);
for (size_t i = 0; i < 4; ++i) {
_mm_prefetch((const void *)&inputs[i][block_offset + 256], _MM_HINT_T0);
}
transpose_vecs(&out[0]);
transpose_vecs(&out[4]);
transpose_vecs(&out[8]);
transpose_vecs(&out[12]);
}
INLINE void load_counters(u64 counter, char increment_counter,
__m128i *out_lo, __m128i *out_hi) {
const __m128i mask = _mm_set1_epi32(-(int32_t)increment_counter);
const __m128i add0 = _mm_set_epi32(3, 2, 1, 0);
const __m128i add1 = _mm_and_si128(mask, add0);
__m128i l = _mm_add_epi32(_mm_set1_epi32((int32_t)counter), add1);
__m128i carry = _mm_cmpgt_epi32(_mm_xor_si128(add1, _mm_set1_epi32(0x80000000)),
_mm_xor_si128( l, _mm_set1_epi32(0x80000000)));
__m128i h = _mm_sub_epi32(_mm_set1_epi32((int32_t)(counter >> 32)), carry);
*out_lo = l;
*out_hi = h;
}
static
void blake3_hash4_sse41(const u8 *const *inputs, size_t blocks,
const u32 key[8], u64 counter,
char increment_counter, u8 flags,
u8 flags_start, u8 flags_end, u8 *out) {
__m128i h_vecs[8] = {
set1(key[0]), set1(key[1]), set1(key[2]), set1(key[3]),
set1(key[4]), set1(key[5]), set1(key[6]), set1(key[7]),
};
__m128i counter_low_vec, counter_high_vec;
load_counters(counter, increment_counter, &counter_low_vec,
&counter_high_vec);
u8 block_flags = flags | flags_start;
for (size_t block = 0; block < blocks; block++) {
if (block + 1 == blocks) {
block_flags |= flags_end;
}
__m128i block_len_vec = set1(BLAKE3_BLOCK_LEN);
__m128i block_flags_vec = set1(block_flags);
__m128i msg_vecs[16];
transpose_msg_vecs(inputs, block * BLAKE3_BLOCK_LEN, msg_vecs);
__m128i v[16] = {
h_vecs[0], h_vecs[1], h_vecs[2], h_vecs[3],
h_vecs[4], h_vecs[5], h_vecs[6], h_vecs[7],
set1(IV[0]), set1(IV[1]), set1(IV[2]), set1(IV[3]),
counter_low_vec, counter_high_vec, block_len_vec, block_flags_vec,
};
round_fn(v, msg_vecs, 0);
round_fn(v, msg_vecs, 1);
round_fn(v, msg_vecs, 2);
round_fn(v, msg_vecs, 3);
round_fn(v, msg_vecs, 4);
round_fn(v, msg_vecs, 5);
round_fn(v, msg_vecs, 6);
h_vecs[0] = xorv(v[0], v[8]);
h_vecs[1] = xorv(v[1], v[9]);
h_vecs[2] = xorv(v[2], v[10]);
h_vecs[3] = xorv(v[3], v[11]);
h_vecs[4] = xorv(v[4], v[12]);
h_vecs[5] = xorv(v[5], v[13]);
h_vecs[6] = xorv(v[6], v[14]);
h_vecs[7] = xorv(v[7], v[15]);
block_flags = flags;
}
transpose_vecs(&h_vecs[0]);
transpose_vecs(&h_vecs[4]);
// The first four vecs now contain the first half of each output, and the
// second four vecs contain the second half of each output.
storeu(h_vecs[0], &out[0 * sizeof(__m128i)]);
storeu(h_vecs[4], &out[1 * sizeof(__m128i)]);
storeu(h_vecs[1], &out[2 * sizeof(__m128i)]);
storeu(h_vecs[5], &out[3 * sizeof(__m128i)]);
storeu(h_vecs[2], &out[4 * sizeof(__m128i)]);
storeu(h_vecs[6], &out[5 * sizeof(__m128i)]);
storeu(h_vecs[3], &out[6 * sizeof(__m128i)]);
storeu(h_vecs[7], &out[7 * sizeof(__m128i)]);
}
INLINE void hash_one_sse41(const u8 *input, size_t blocks,
const u32 key[8], u64 counter,
u8 flags, u8 flags_start,
u8 flags_end, u8 out[BLAKE3_OUT_LEN]) {
u32 cv[8];
memcpy(cv, key, BLAKE3_KEY_LEN);
u8 block_flags = flags | flags_start;
while (blocks > 0) {
if (blocks == 1) {
block_flags |= flags_end;
}
blake3_compress_in_place_sse41(cv, input, BLAKE3_BLOCK_LEN, counter,
block_flags);
input = &input[BLAKE3_BLOCK_LEN];
blocks -= 1;
block_flags = flags;
}
memcpy(out, cv, BLAKE3_OUT_LEN);
}
void blake3_hash_many_sse41(const u8 *const *inputs, size_t num_inputs,
size_t blocks, const u32 key[8],
u64 counter, char increment_counter,
u8 flags, u8 flags_start,
u8 flags_end, u8 *out) {
while (num_inputs >= DEGREE) {
blake3_hash4_sse41(inputs, blocks, key, counter, increment_counter, flags,
flags_start, flags_end, out);
if (increment_counter) {
counter += DEGREE;
}
inputs += DEGREE;
num_inputs -= DEGREE;
out = &out[DEGREE * BLAKE3_OUT_LEN];
}
while (num_inputs > 0) {
hash_one_sse41(inputs[0], blocks, key, counter, flags, flags_start,
flags_end, out);
if (increment_counter) {
counter += 1;
}
inputs += 1;
num_inputs -= 1;
out = &out[BLAKE3_OUT_LEN];
}
}