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sha256avx.cpp
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sha256avx.cpp
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#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include "sha256avx.h"
namespace sphincs_plus {
// Transpose 8 vectors containing 32-bit values
static void transpose(u256 s[8]) {
u256 tmp0[8];
u256 tmp1[8];
tmp0[0] = _mm256_unpacklo_epi32(s[0], s[1]);
tmp0[1] = _mm256_unpackhi_epi32(s[0], s[1]);
tmp0[2] = _mm256_unpacklo_epi32(s[2], s[3]);
tmp0[3] = _mm256_unpackhi_epi32(s[2], s[3]);
tmp0[4] = _mm256_unpacklo_epi32(s[4], s[5]);
tmp0[5] = _mm256_unpackhi_epi32(s[4], s[5]);
tmp0[6] = _mm256_unpacklo_epi32(s[6], s[7]);
tmp0[7] = _mm256_unpackhi_epi32(s[6], s[7]);
tmp1[0] = _mm256_unpacklo_epi64(tmp0[0], tmp0[2]);
tmp1[1] = _mm256_unpackhi_epi64(tmp0[0], tmp0[2]);
tmp1[2] = _mm256_unpacklo_epi64(tmp0[1], tmp0[3]);
tmp1[3] = _mm256_unpackhi_epi64(tmp0[1], tmp0[3]);
tmp1[4] = _mm256_unpacklo_epi64(tmp0[4], tmp0[6]);
tmp1[5] = _mm256_unpackhi_epi64(tmp0[4], tmp0[6]);
tmp1[6] = _mm256_unpacklo_epi64(tmp0[5], tmp0[7]);
tmp1[7] = _mm256_unpackhi_epi64(tmp0[5], tmp0[7]);
s[0] = _mm256_permute2x128_si256(tmp1[0], tmp1[4], 0x20);
s[1] = _mm256_permute2x128_si256(tmp1[1], tmp1[5], 0x20);
s[2] = _mm256_permute2x128_si256(tmp1[2], tmp1[6], 0x20);
s[3] = _mm256_permute2x128_si256(tmp1[3], tmp1[7], 0x20);
s[4] = _mm256_permute2x128_si256(tmp1[0], tmp1[4], 0x31);
s[5] = _mm256_permute2x128_si256(tmp1[1], tmp1[5], 0x31);
s[6] = _mm256_permute2x128_si256(tmp1[2], tmp1[6], 0x31);
s[7] = _mm256_permute2x128_si256(tmp1[3], tmp1[7], 0x31);
}
void sha256_init_frombytes_x8(sha256ctx8x *ctx, uint32_t *s, unsigned long long msglen) {
uint32_t t;
for (size_t i = 0; i < 8; i++) {
t = s[i];
ctx->s[i] = _mm256_set_epi32(t, t, t, t, t, t, t, t);
}
ctx->datalen = 0;
ctx->msglen = msglen;
}
void sha256_init8x(sha256ctx8x *ctx) {
ctx->s[0] = _mm256_set_epi32(0x6a09e667,0x6a09e667,0x6a09e667,0x6a09e667,0x6a09e667,0x6a09e667,0x6a09e667,0x6a09e667);
ctx->s[1] = _mm256_set_epi32(0xbb67ae85,0xbb67ae85,0xbb67ae85,0xbb67ae85,0xbb67ae85,0xbb67ae85,0xbb67ae85,0xbb67ae85);
ctx->s[2] = _mm256_set_epi32(0x3c6ef372,0x3c6ef372,0x3c6ef372,0x3c6ef372,0x3c6ef372,0x3c6ef372,0x3c6ef372,0x3c6ef372);
ctx->s[3] = _mm256_set_epi32(0xa54ff53a,0xa54ff53a,0xa54ff53a,0xa54ff53a,0xa54ff53a,0xa54ff53a,0xa54ff53a,0xa54ff53a);
ctx->s[4] = _mm256_set_epi32(0x510e527f,0x510e527f,0x510e527f,0x510e527f,0x510e527f,0x510e527f,0x510e527f,0x510e527f);
ctx->s[5] = _mm256_set_epi32(0x9b05688c,0x9b05688c,0x9b05688c,0x9b05688c,0x9b05688c,0x9b05688c,0x9b05688c,0x9b05688c);
ctx->s[6] = _mm256_set_epi32(0x1f83d9ab,0x1f83d9ab,0x1f83d9ab,0x1f83d9ab,0x1f83d9ab,0x1f83d9ab,0x1f83d9ab,0x1f83d9ab);
ctx->s[7] = _mm256_set_epi32(0x5be0cd19,0x5be0cd19,0x5be0cd19,0x5be0cd19,0x5be0cd19,0x5be0cd19,0x5be0cd19,0x5be0cd19);
ctx->datalen = 0;
ctx->msglen = 0;
}
void sha256_update8x(sha256ctx8x *ctx,
const void *i0,
const void *i1,
const void *i2,
const void *i3,
const void *i4,
const void *i5,
const void *i6,
const void *i7,
unsigned long long len)
{
unsigned long long i = 0;
const unsigned char *d0 = static_cast<const unsigned char *>(i0);
const unsigned char *d1 = static_cast<const unsigned char *>(i1);
const unsigned char *d2 = static_cast<const unsigned char *>(i2);
const unsigned char *d3 = static_cast<const unsigned char *>(i3);
const unsigned char *d4 = static_cast<const unsigned char *>(i4);
const unsigned char *d5 = static_cast<const unsigned char *>(i5);
const unsigned char *d6 = static_cast<const unsigned char *>(i6);
const unsigned char *d7 = static_cast<const unsigned char *>(i7);
int datalen = ctx->datalen;
while(i < len) {
int bytes_to_copy = len - i;
if (bytes_to_copy + datalen > 64) bytes_to_copy = 64 - datalen;
memcpy(&ctx->msgblocks[64*0+datalen], d0 + i, bytes_to_copy);
memcpy(&ctx->msgblocks[64*1+datalen], d1 + i, bytes_to_copy);
memcpy(&ctx->msgblocks[64*2+datalen], d2 + i, bytes_to_copy);
memcpy(&ctx->msgblocks[64*3+datalen], d3 + i, bytes_to_copy);
memcpy(&ctx->msgblocks[64*4+datalen], d4 + i, bytes_to_copy);
memcpy(&ctx->msgblocks[64*5+datalen], d5 + i, bytes_to_copy);
memcpy(&ctx->msgblocks[64*6+datalen], d6 + i, bytes_to_copy);
memcpy(&ctx->msgblocks[64*7+datalen], d7 + i, bytes_to_copy);
datalen += bytes_to_copy;
i += bytes_to_copy;
if (datalen == 64) {
sha256_transform8x(ctx, ctx->msgblocks);
ctx->msglen += 512;
datalen = 0;
}
}
ctx->datalen = datalen;
}
void sha256_final8x(sha256ctx8x *ctx,
u256 *out0,
u256 *out1,
u256 *out2,
u256 *out3,
u256 *out4,
u256 *out5,
u256 *out6,
u256 *out7)
{
unsigned int i, curlen;
// Padding
if (ctx->datalen < 56) {
for (i = 0; i < 8; ++i) {
curlen = ctx->datalen;
ctx->msgblocks[64*i + curlen++] = 0x80;
while(curlen < 64) {
ctx->msgblocks[64*i + curlen++] = 0x00;
}
}
} else {
for (i = 0; i < 8; ++i) {
curlen = ctx->datalen;
ctx->msgblocks[64*i + curlen++] = 0x80;
while(curlen < 64) {
ctx->msgblocks[64*i + curlen++] = 0x00;
}
}
sha256_transform8x(ctx, ctx->msgblocks);
memset(ctx->msgblocks, 0, 8 * 64);
}
// Add length of the message to each block
ctx->msglen += ctx->datalen * 8;
for (i = 0; i < 8; i++) {
ctx->msgblocks[64*i + 63] = ctx->msglen;
ctx->msgblocks[64*i + 62] = ctx->msglen >> 8;
ctx->msgblocks[64*i + 61] = ctx->msglen >> 16;
ctx->msgblocks[64*i + 60] = ctx->msglen >> 24;
ctx->msgblocks[64*i + 59] = ctx->msglen >> 32;
ctx->msgblocks[64*i + 58] = ctx->msglen >> 40;
ctx->msgblocks[64*i + 57] = ctx->msglen >> 48;
ctx->msgblocks[64*i + 56] = ctx->msglen >> 56;
}
sha256_transform8x(ctx, ctx->msgblocks);
// Compute final hash output
transpose(ctx->s);
// Store Hash value
STORE(out0, BYTESWAP(ctx->s[0]));
STORE(out1, BYTESWAP(ctx->s[1]));
STORE(out2, BYTESWAP(ctx->s[2]));
STORE(out3, BYTESWAP(ctx->s[3]));
STORE(out4, BYTESWAP(ctx->s[4]));
STORE(out5, BYTESWAP(ctx->s[5]));
STORE(out6, BYTESWAP(ctx->s[6]));
STORE(out7, BYTESWAP(ctx->s[7]));
}
void sha256_transform8x(sha256ctx8x *ctx, const unsigned char *data) {
u256 s[8], w[64], T0, T1;
int i;
// Load words and transform data correctly
for(i = 0; i < 8; i++) {
w[i] = BYTESWAP(LOAD(data + 64*i));
w[i + 8] = BYTESWAP(LOAD(data + 32 + 64*i));
}
transpose(w);
transpose(w + 8);
// Initial State
s[0] = ctx->s[0];
s[1] = ctx->s[1];
s[2] = ctx->s[2];
s[3] = ctx->s[3];
s[4] = ctx->s[4];
s[5] = ctx->s[5];
s[6] = ctx->s[6];
s[7] = ctx->s[7];
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 0, w[0]);
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 1, w[1]);
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 2, w[2]);
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 3, w[3]);
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 4, w[4]);
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 5, w[5]);
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 6, w[6]);
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 7, w[7]);
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 8, w[8]);
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 9, w[9]);
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 10, w[10]);
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 11, w[11]);
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 12, w[12]);
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 13, w[13]);
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 14, w[14]);
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 15, w[15]);
w[16] = ADD4_32(WSIGMA1_AVX(w[14]), w[0], w[9], WSIGMA0_AVX(w[1]));
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 16, w[16]);
w[17] = ADD4_32(WSIGMA1_AVX(w[15]), w[1], w[10], WSIGMA0_AVX(w[2]));
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 17, w[17]);
w[18] = ADD4_32(WSIGMA1_AVX(w[16]), w[2], w[11], WSIGMA0_AVX(w[3]));
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 18, w[18]);
w[19] = ADD4_32(WSIGMA1_AVX(w[17]), w[3], w[12], WSIGMA0_AVX(w[4]));
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 19, w[19]);
w[20] = ADD4_32(WSIGMA1_AVX(w[18]), w[4], w[13], WSIGMA0_AVX(w[5]));
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 20, w[20]);
w[21] = ADD4_32(WSIGMA1_AVX(w[19]), w[5], w[14], WSIGMA0_AVX(w[6]));
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 21, w[21]);
w[22] = ADD4_32(WSIGMA1_AVX(w[20]), w[6], w[15], WSIGMA0_AVX(w[7]));
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 22, w[22]);
w[23] = ADD4_32(WSIGMA1_AVX(w[21]), w[7], w[16], WSIGMA0_AVX(w[8]));
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 23, w[23]);
w[24] = ADD4_32(WSIGMA1_AVX(w[22]), w[8], w[17], WSIGMA0_AVX(w[9]));
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 24, w[24]);
w[25] = ADD4_32(WSIGMA1_AVX(w[23]), w[9], w[18], WSIGMA0_AVX(w[10]));
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 25, w[25]);
w[26] = ADD4_32(WSIGMA1_AVX(w[24]), w[10], w[19], WSIGMA0_AVX(w[11]));
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 26, w[26]);
w[27] = ADD4_32(WSIGMA1_AVX(w[25]), w[11], w[20], WSIGMA0_AVX(w[12]));
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 27, w[27]);
w[28] = ADD4_32(WSIGMA1_AVX(w[26]), w[12], w[21], WSIGMA0_AVX(w[13]));
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 28, w[28]);
w[29] = ADD4_32(WSIGMA1_AVX(w[27]), w[13], w[22], WSIGMA0_AVX(w[14]));
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 29, w[29]);
w[30] = ADD4_32(WSIGMA1_AVX(w[28]), w[14], w[23], WSIGMA0_AVX(w[15]));
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 30, w[30]);
w[31] = ADD4_32(WSIGMA1_AVX(w[29]), w[15], w[24], WSIGMA0_AVX(w[16]));
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 31, w[31]);
w[32] = ADD4_32(WSIGMA1_AVX(w[30]), w[16], w[25], WSIGMA0_AVX(w[17]));
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 32, w[32]);
w[33] = ADD4_32(WSIGMA1_AVX(w[31]), w[17], w[26], WSIGMA0_AVX(w[18]));
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 33, w[33]);
w[34] = ADD4_32(WSIGMA1_AVX(w[32]), w[18], w[27], WSIGMA0_AVX(w[19]));
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 34, w[34]);
w[35] = ADD4_32(WSIGMA1_AVX(w[33]), w[19], w[28], WSIGMA0_AVX(w[20]));
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 35, w[35]);
w[36] = ADD4_32(WSIGMA1_AVX(w[34]), w[20], w[29], WSIGMA0_AVX(w[21]));
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 36, w[36]);
w[37] = ADD4_32(WSIGMA1_AVX(w[35]), w[21], w[30], WSIGMA0_AVX(w[22]));
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 37, w[37]);
w[38] = ADD4_32(WSIGMA1_AVX(w[36]), w[22], w[31], WSIGMA0_AVX(w[23]));
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 38, w[38]);
w[39] = ADD4_32(WSIGMA1_AVX(w[37]), w[23], w[32], WSIGMA0_AVX(w[24]));
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 39, w[39]);
w[40] = ADD4_32(WSIGMA1_AVX(w[38]), w[24], w[33], WSIGMA0_AVX(w[25]));
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 40, w[40]);
w[41] = ADD4_32(WSIGMA1_AVX(w[39]), w[25], w[34], WSIGMA0_AVX(w[26]));
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 41, w[41]);
w[42] = ADD4_32(WSIGMA1_AVX(w[40]), w[26], w[35], WSIGMA0_AVX(w[27]));
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 42, w[42]);
w[43] = ADD4_32(WSIGMA1_AVX(w[41]), w[27], w[36], WSIGMA0_AVX(w[28]));
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 43, w[43]);
w[44] = ADD4_32(WSIGMA1_AVX(w[42]), w[28], w[37], WSIGMA0_AVX(w[29]));
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 44, w[44]);
w[45] = ADD4_32(WSIGMA1_AVX(w[43]), w[29], w[38], WSIGMA0_AVX(w[30]));
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 45, w[45]);
w[46] = ADD4_32(WSIGMA1_AVX(w[44]), w[30], w[39], WSIGMA0_AVX(w[31]));
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 46, w[46]);
w[47] = ADD4_32(WSIGMA1_AVX(w[45]), w[31], w[40], WSIGMA0_AVX(w[32]));
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 47, w[47]);
w[48] = ADD4_32(WSIGMA1_AVX(w[46]), w[32], w[41], WSIGMA0_AVX(w[33]));
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 48, w[48]);
w[49] = ADD4_32(WSIGMA1_AVX(w[47]), w[33], w[42], WSIGMA0_AVX(w[34]));
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 49, w[49]);
w[50] = ADD4_32(WSIGMA1_AVX(w[48]), w[34], w[43], WSIGMA0_AVX(w[35]));
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 50, w[50]);
w[51] = ADD4_32(WSIGMA1_AVX(w[49]), w[35], w[44], WSIGMA0_AVX(w[36]));
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 51, w[51]);
w[52] = ADD4_32(WSIGMA1_AVX(w[50]), w[36], w[45], WSIGMA0_AVX(w[37]));
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 52, w[52]);
w[53] = ADD4_32(WSIGMA1_AVX(w[51]), w[37], w[46], WSIGMA0_AVX(w[38]));
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 53, w[53]);
w[54] = ADD4_32(WSIGMA1_AVX(w[52]), w[38], w[47], WSIGMA0_AVX(w[39]));
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 54, w[54]);
w[55] = ADD4_32(WSIGMA1_AVX(w[53]), w[39], w[48], WSIGMA0_AVX(w[40]));
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 55, w[55]);
w[56] = ADD4_32(WSIGMA1_AVX(w[54]), w[40], w[49], WSIGMA0_AVX(w[41]));
SHA256ROUND_AVX(s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], 56, w[56]);
w[57] = ADD4_32(WSIGMA1_AVX(w[55]), w[41], w[50], WSIGMA0_AVX(w[42]));
SHA256ROUND_AVX(s[7], s[0], s[1], s[2], s[3], s[4], s[5], s[6], 57, w[57]);
w[58] = ADD4_32(WSIGMA1_AVX(w[56]), w[42], w[51], WSIGMA0_AVX(w[43]));
SHA256ROUND_AVX(s[6], s[7], s[0], s[1], s[2], s[3], s[4], s[5], 58, w[58]);
w[59] = ADD4_32(WSIGMA1_AVX(w[57]), w[43], w[52], WSIGMA0_AVX(w[44]));
SHA256ROUND_AVX(s[5], s[6], s[7], s[0], s[1], s[2], s[3], s[4], 59, w[59]);
w[60] = ADD4_32(WSIGMA1_AVX(w[58]), w[44], w[53], WSIGMA0_AVX(w[45]));
SHA256ROUND_AVX(s[4], s[5], s[6], s[7], s[0], s[1], s[2], s[3], 60, w[60]);
w[61] = ADD4_32(WSIGMA1_AVX(w[59]), w[45], w[54], WSIGMA0_AVX(w[46]));
SHA256ROUND_AVX(s[3], s[4], s[5], s[6], s[7], s[0], s[1], s[2], 61, w[61]);
w[62] = ADD4_32(WSIGMA1_AVX(w[60]), w[46], w[55], WSIGMA0_AVX(w[47]));
SHA256ROUND_AVX(s[2], s[3], s[4], s[5], s[6], s[7], s[0], s[1], 62, w[62]);
w[63] = ADD4_32(WSIGMA1_AVX(w[61]), w[47], w[56], WSIGMA0_AVX(w[48]));
SHA256ROUND_AVX(s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[0], 63, w[63]);
// Feed Forward
ctx->s[0] = ADD32(s[0], ctx->s[0]);
ctx->s[1] = ADD32(s[1], ctx->s[1]);
ctx->s[2] = ADD32(s[2], ctx->s[2]);
ctx->s[3] = ADD32(s[3], ctx->s[3]);
ctx->s[4] = ADD32(s[4], ctx->s[4]);
ctx->s[5] = ADD32(s[5], ctx->s[5]);
ctx->s[6] = ADD32(s[6], ctx->s[6]);
ctx->s[7] = ADD32(s[7], ctx->s[7]);
}
} /* namespace sphincs_plus */