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pqcrypto/crypto_kem/kyber512-90s/avx2/rejsample.c
Thom Wiggers 526a841886
Add Kyber90s
2019-09-24 08:01:54 +02:00

389 lines
15 KiB
C
Raw Blame History

#include "consts.h"
#include "params.h"
#include "rejsample.h"
#include <immintrin.h>
#include <stdint.h>
static const uint8_t idx[256][8] = {
{ 0, 0, 0, 0, 0, 0, 0, 0},
{ 0, 0, 0, 0, 0, 0, 0, 0},
{ 2, 0, 0, 0, 0, 0, 0, 0},
{ 0, 2, 0, 0, 0, 0, 0, 0},
{ 4, 0, 0, 0, 0, 0, 0, 0},
{ 0, 4, 0, 0, 0, 0, 0, 0},
{ 2, 4, 0, 0, 0, 0, 0, 0},
{ 0, 2, 4, 0, 0, 0, 0, 0},
{ 6, 0, 0, 0, 0, 0, 0, 0},
{ 0, 6, 0, 0, 0, 0, 0, 0},
{ 2, 6, 0, 0, 0, 0, 0, 0},
{ 0, 2, 6, 0, 0, 0, 0, 0},
{ 4, 6, 0, 0, 0, 0, 0, 0},
{ 0, 4, 6, 0, 0, 0, 0, 0},
{ 2, 4, 6, 0, 0, 0, 0, 0},
{ 0, 2, 4, 6, 0, 0, 0, 0},
{ 8, 0, 0, 0, 0, 0, 0, 0},
{ 0, 8, 0, 0, 0, 0, 0, 0},
{ 2, 8, 0, 0, 0, 0, 0, 0},
{ 0, 2, 8, 0, 0, 0, 0, 0},
{ 4, 8, 0, 0, 0, 0, 0, 0},
{ 0, 4, 8, 0, 0, 0, 0, 0},
{ 2, 4, 8, 0, 0, 0, 0, 0},
{ 0, 2, 4, 8, 0, 0, 0, 0},
{ 6, 8, 0, 0, 0, 0, 0, 0},
{ 0, 6, 8, 0, 0, 0, 0, 0},
{ 2, 6, 8, 0, 0, 0, 0, 0},
{ 0, 2, 6, 8, 0, 0, 0, 0},
{ 4, 6, 8, 0, 0, 0, 0, 0},
{ 0, 4, 6, 8, 0, 0, 0, 0},
{ 2, 4, 6, 8, 0, 0, 0, 0},
{ 0, 2, 4, 6, 8, 0, 0, 0},
{10, 0, 0, 0, 0, 0, 0, 0},
{ 0, 10, 0, 0, 0, 0, 0, 0},
{ 2, 10, 0, 0, 0, 0, 0, 0},
{ 0, 2, 10, 0, 0, 0, 0, 0},
{ 4, 10, 0, 0, 0, 0, 0, 0},
{ 0, 4, 10, 0, 0, 0, 0, 0},
{ 2, 4, 10, 0, 0, 0, 0, 0},
{ 0, 2, 4, 10, 0, 0, 0, 0},
{ 6, 10, 0, 0, 0, 0, 0, 0},
{ 0, 6, 10, 0, 0, 0, 0, 0},
{ 2, 6, 10, 0, 0, 0, 0, 0},
{ 0, 2, 6, 10, 0, 0, 0, 0},
{ 4, 6, 10, 0, 0, 0, 0, 0},
{ 0, 4, 6, 10, 0, 0, 0, 0},
{ 2, 4, 6, 10, 0, 0, 0, 0},
{ 0, 2, 4, 6, 10, 0, 0, 0},
{ 8, 10, 0, 0, 0, 0, 0, 0},
{ 0, 8, 10, 0, 0, 0, 0, 0},
{ 2, 8, 10, 0, 0, 0, 0, 0},
{ 0, 2, 8, 10, 0, 0, 0, 0},
{ 4, 8, 10, 0, 0, 0, 0, 0},
{ 0, 4, 8, 10, 0, 0, 0, 0},
{ 2, 4, 8, 10, 0, 0, 0, 0},
{ 0, 2, 4, 8, 10, 0, 0, 0},
{ 6, 8, 10, 0, 0, 0, 0, 0},
{ 0, 6, 8, 10, 0, 0, 0, 0},
{ 2, 6, 8, 10, 0, 0, 0, 0},
{ 0, 2, 6, 8, 10, 0, 0, 0},
{ 4, 6, 8, 10, 0, 0, 0, 0},
{ 0, 4, 6, 8, 10, 0, 0, 0},
{ 2, 4, 6, 8, 10, 0, 0, 0},
{ 0, 2, 4, 6, 8, 10, 0, 0},
{12, 0, 0, 0, 0, 0, 0, 0},
{ 0, 12, 0, 0, 0, 0, 0, 0},
{ 2, 12, 0, 0, 0, 0, 0, 0},
{ 0, 2, 12, 0, 0, 0, 0, 0},
{ 4, 12, 0, 0, 0, 0, 0, 0},
{ 0, 4, 12, 0, 0, 0, 0, 0},
{ 2, 4, 12, 0, 0, 0, 0, 0},
{ 0, 2, 4, 12, 0, 0, 0, 0},
{ 6, 12, 0, 0, 0, 0, 0, 0},
{ 0, 6, 12, 0, 0, 0, 0, 0},
{ 2, 6, 12, 0, 0, 0, 0, 0},
{ 0, 2, 6, 12, 0, 0, 0, 0},
{ 4, 6, 12, 0, 0, 0, 0, 0},
{ 0, 4, 6, 12, 0, 0, 0, 0},
{ 2, 4, 6, 12, 0, 0, 0, 0},
{ 0, 2, 4, 6, 12, 0, 0, 0},
{ 8, 12, 0, 0, 0, 0, 0, 0},
{ 0, 8, 12, 0, 0, 0, 0, 0},
{ 2, 8, 12, 0, 0, 0, 0, 0},
{ 0, 2, 8, 12, 0, 0, 0, 0},
{ 4, 8, 12, 0, 0, 0, 0, 0},
{ 0, 4, 8, 12, 0, 0, 0, 0},
{ 2, 4, 8, 12, 0, 0, 0, 0},
{ 0, 2, 4, 8, 12, 0, 0, 0},
{ 6, 8, 12, 0, 0, 0, 0, 0},
{ 0, 6, 8, 12, 0, 0, 0, 0},
{ 2, 6, 8, 12, 0, 0, 0, 0},
{ 0, 2, 6, 8, 12, 0, 0, 0},
{ 4, 6, 8, 12, 0, 0, 0, 0},
{ 0, 4, 6, 8, 12, 0, 0, 0},
{ 2, 4, 6, 8, 12, 0, 0, 0},
{ 0, 2, 4, 6, 8, 12, 0, 0},
{10, 12, 0, 0, 0, 0, 0, 0},
{ 0, 10, 12, 0, 0, 0, 0, 0},
{ 2, 10, 12, 0, 0, 0, 0, 0},
{ 0, 2, 10, 12, 0, 0, 0, 0},
{ 4, 10, 12, 0, 0, 0, 0, 0},
{ 0, 4, 10, 12, 0, 0, 0, 0},
{ 2, 4, 10, 12, 0, 0, 0, 0},
{ 0, 2, 4, 10, 12, 0, 0, 0},
{ 6, 10, 12, 0, 0, 0, 0, 0},
{ 0, 6, 10, 12, 0, 0, 0, 0},
{ 2, 6, 10, 12, 0, 0, 0, 0},
{ 0, 2, 6, 10, 12, 0, 0, 0},
{ 4, 6, 10, 12, 0, 0, 0, 0},
{ 0, 4, 6, 10, 12, 0, 0, 0},
{ 2, 4, 6, 10, 12, 0, 0, 0},
{ 0, 2, 4, 6, 10, 12, 0, 0},
{ 8, 10, 12, 0, 0, 0, 0, 0},
{ 0, 8, 10, 12, 0, 0, 0, 0},
{ 2, 8, 10, 12, 0, 0, 0, 0},
{ 0, 2, 8, 10, 12, 0, 0, 0},
{ 4, 8, 10, 12, 0, 0, 0, 0},
{ 0, 4, 8, 10, 12, 0, 0, 0},
{ 2, 4, 8, 10, 12, 0, 0, 0},
{ 0, 2, 4, 8, 10, 12, 0, 0},
{ 6, 8, 10, 12, 0, 0, 0, 0},
{ 0, 6, 8, 10, 12, 0, 0, 0},
{ 2, 6, 8, 10, 12, 0, 0, 0},
{ 0, 2, 6, 8, 10, 12, 0, 0},
{ 4, 6, 8, 10, 12, 0, 0, 0},
{ 0, 4, 6, 8, 10, 12, 0, 0},
{ 2, 4, 6, 8, 10, 12, 0, 0},
{ 0, 2, 4, 6, 8, 10, 12, 0},
{14, 0, 0, 0, 0, 0, 0, 0},
{ 0, 14, 0, 0, 0, 0, 0, 0},
{ 2, 14, 0, 0, 0, 0, 0, 0},
{ 0, 2, 14, 0, 0, 0, 0, 0},
{ 4, 14, 0, 0, 0, 0, 0, 0},
{ 0, 4, 14, 0, 0, 0, 0, 0},
{ 2, 4, 14, 0, 0, 0, 0, 0},
{ 0, 2, 4, 14, 0, 0, 0, 0},
{ 6, 14, 0, 0, 0, 0, 0, 0},
{ 0, 6, 14, 0, 0, 0, 0, 0},
{ 2, 6, 14, 0, 0, 0, 0, 0},
{ 0, 2, 6, 14, 0, 0, 0, 0},
{ 4, 6, 14, 0, 0, 0, 0, 0},
{ 0, 4, 6, 14, 0, 0, 0, 0},
{ 2, 4, 6, 14, 0, 0, 0, 0},
{ 0, 2, 4, 6, 14, 0, 0, 0},
{ 8, 14, 0, 0, 0, 0, 0, 0},
{ 0, 8, 14, 0, 0, 0, 0, 0},
{ 2, 8, 14, 0, 0, 0, 0, 0},
{ 0, 2, 8, 14, 0, 0, 0, 0},
{ 4, 8, 14, 0, 0, 0, 0, 0},
{ 0, 4, 8, 14, 0, 0, 0, 0},
{ 2, 4, 8, 14, 0, 0, 0, 0},
{ 0, 2, 4, 8, 14, 0, 0, 0},
{ 6, 8, 14, 0, 0, 0, 0, 0},
{ 0, 6, 8, 14, 0, 0, 0, 0},
{ 2, 6, 8, 14, 0, 0, 0, 0},
{ 0, 2, 6, 8, 14, 0, 0, 0},
{ 4, 6, 8, 14, 0, 0, 0, 0},
{ 0, 4, 6, 8, 14, 0, 0, 0},
{ 2, 4, 6, 8, 14, 0, 0, 0},
{ 0, 2, 4, 6, 8, 14, 0, 0},
{10, 14, 0, 0, 0, 0, 0, 0},
{ 0, 10, 14, 0, 0, 0, 0, 0},
{ 2, 10, 14, 0, 0, 0, 0, 0},
{ 0, 2, 10, 14, 0, 0, 0, 0},
{ 4, 10, 14, 0, 0, 0, 0, 0},
{ 0, 4, 10, 14, 0, 0, 0, 0},
{ 2, 4, 10, 14, 0, 0, 0, 0},
{ 0, 2, 4, 10, 14, 0, 0, 0},
{ 6, 10, 14, 0, 0, 0, 0, 0},
{ 0, 6, 10, 14, 0, 0, 0, 0},
{ 2, 6, 10, 14, 0, 0, 0, 0},
{ 0, 2, 6, 10, 14, 0, 0, 0},
{ 4, 6, 10, 14, 0, 0, 0, 0},
{ 0, 4, 6, 10, 14, 0, 0, 0},
{ 2, 4, 6, 10, 14, 0, 0, 0},
{ 0, 2, 4, 6, 10, 14, 0, 0},
{ 8, 10, 14, 0, 0, 0, 0, 0},
{ 0, 8, 10, 14, 0, 0, 0, 0},
{ 2, 8, 10, 14, 0, 0, 0, 0},
{ 0, 2, 8, 10, 14, 0, 0, 0},
{ 4, 8, 10, 14, 0, 0, 0, 0},
{ 0, 4, 8, 10, 14, 0, 0, 0},
{ 2, 4, 8, 10, 14, 0, 0, 0},
{ 0, 2, 4, 8, 10, 14, 0, 0},
{ 6, 8, 10, 14, 0, 0, 0, 0},
{ 0, 6, 8, 10, 14, 0, 0, 0},
{ 2, 6, 8, 10, 14, 0, 0, 0},
{ 0, 2, 6, 8, 10, 14, 0, 0},
{ 4, 6, 8, 10, 14, 0, 0, 0},
{ 0, 4, 6, 8, 10, 14, 0, 0},
{ 2, 4, 6, 8, 10, 14, 0, 0},
{ 0, 2, 4, 6, 8, 10, 14, 0},
{12, 14, 0, 0, 0, 0, 0, 0},
{ 0, 12, 14, 0, 0, 0, 0, 0},
{ 2, 12, 14, 0, 0, 0, 0, 0},
{ 0, 2, 12, 14, 0, 0, 0, 0},
{ 4, 12, 14, 0, 0, 0, 0, 0},
{ 0, 4, 12, 14, 0, 0, 0, 0},
{ 2, 4, 12, 14, 0, 0, 0, 0},
{ 0, 2, 4, 12, 14, 0, 0, 0},
{ 6, 12, 14, 0, 0, 0, 0, 0},
{ 0, 6, 12, 14, 0, 0, 0, 0},
{ 2, 6, 12, 14, 0, 0, 0, 0},
{ 0, 2, 6, 12, 14, 0, 0, 0},
{ 4, 6, 12, 14, 0, 0, 0, 0},
{ 0, 4, 6, 12, 14, 0, 0, 0},
{ 2, 4, 6, 12, 14, 0, 0, 0},
{ 0, 2, 4, 6, 12, 14, 0, 0},
{ 8, 12, 14, 0, 0, 0, 0, 0},
{ 0, 8, 12, 14, 0, 0, 0, 0},
{ 2, 8, 12, 14, 0, 0, 0, 0},
{ 0, 2, 8, 12, 14, 0, 0, 0},
{ 4, 8, 12, 14, 0, 0, 0, 0},
{ 0, 4, 8, 12, 14, 0, 0, 0},
{ 2, 4, 8, 12, 14, 0, 0, 0},
{ 0, 2, 4, 8, 12, 14, 0, 0},
{ 6, 8, 12, 14, 0, 0, 0, 0},
{ 0, 6, 8, 12, 14, 0, 0, 0},
{ 2, 6, 8, 12, 14, 0, 0, 0},
{ 0, 2, 6, 8, 12, 14, 0, 0},
{ 4, 6, 8, 12, 14, 0, 0, 0},
{ 0, 4, 6, 8, 12, 14, 0, 0},
{ 2, 4, 6, 8, 12, 14, 0, 0},
{ 0, 2, 4, 6, 8, 12, 14, 0},
{10, 12, 14, 0, 0, 0, 0, 0},
{ 0, 10, 12, 14, 0, 0, 0, 0},
{ 2, 10, 12, 14, 0, 0, 0, 0},
{ 0, 2, 10, 12, 14, 0, 0, 0},
{ 4, 10, 12, 14, 0, 0, 0, 0},
{ 0, 4, 10, 12, 14, 0, 0, 0},
{ 2, 4, 10, 12, 14, 0, 0, 0},
{ 0, 2, 4, 10, 12, 14, 0, 0},
{ 6, 10, 12, 14, 0, 0, 0, 0},
{ 0, 6, 10, 12, 14, 0, 0, 0},
{ 2, 6, 10, 12, 14, 0, 0, 0},
{ 0, 2, 6, 10, 12, 14, 0, 0},
{ 4, 6, 10, 12, 14, 0, 0, 0},
{ 0, 4, 6, 10, 12, 14, 0, 0},
{ 2, 4, 6, 10, 12, 14, 0, 0},
{ 0, 2, 4, 6, 10, 12, 14, 0},
{ 8, 10, 12, 14, 0, 0, 0, 0},
{ 0, 8, 10, 12, 14, 0, 0, 0},
{ 2, 8, 10, 12, 14, 0, 0, 0},
{ 0, 2, 8, 10, 12, 14, 0, 0},
{ 4, 8, 10, 12, 14, 0, 0, 0},
{ 0, 4, 8, 10, 12, 14, 0, 0},
{ 2, 4, 8, 10, 12, 14, 0, 0},
{ 0, 2, 4, 8, 10, 12, 14, 0},
{ 6, 8, 10, 12, 14, 0, 0, 0},
{ 0, 6, 8, 10, 12, 14, 0, 0},
{ 2, 6, 8, 10, 12, 14, 0, 0},
{ 0, 2, 6, 8, 10, 12, 14, 0},
{ 4, 6, 8, 10, 12, 14, 0, 0},
{ 0, 4, 6, 8, 10, 12, 14, 0},
{ 2, 4, 6, 8, 10, 12, 14, 0},
{ 0, 2, 4, 6, 8, 10, 12, 14}
};
#define _mm256_cmpge_epu16(a, b) _mm256_cmpeq_epi16(_mm256_max_epu16(a, b), a)
#define _mm_cmpge_epu16(a, b) _mm_cmpeq_epi16(_mm_max_epu16(a, b), a)
size_t PQCLEAN_KYBER51290S_AVX2_rej_uniform(int16_t *r,
size_t len,
const uint8_t *buf,
size_t buflen) {
size_t ctr, pos;
uint16_t val;
uint32_t good0, good1, good2;
const __m256i bound = _mm256_set1_epi16((int16_t)(19 * KYBER_Q - 1)); // -1 to use cheaper >= instead of > comparison
const __m256i ones = _mm256_set1_epi8(1);
const __m256i kyberq = _mm256_load_si256(&PQCLEAN_KYBER51290S_AVX2_16xq.as_vec);
const __m256i v = _mm256_load_si256(&PQCLEAN_KYBER51290S_AVX2_16xv.as_vec);
__m256i d0, d1, d2, tmp0, tmp1, tmp2, pi0, pi1, pi2;
__m128i d, tmp, pilo, pihi;
ctr = pos = 0;
while (ctr + 48 <= len && pos + 96 <= buflen) {
d0 = _mm256_loadu_si256((__m256i *)&buf[pos + 0]);
d1 = _mm256_loadu_si256((__m256i *)&buf[pos + 32]);
d2 = _mm256_loadu_si256((__m256i *)&buf[pos + 64]);
tmp0 = _mm256_cmpge_epu16(bound, d0);
tmp1 = _mm256_cmpge_epu16(bound, d1);
tmp2 = _mm256_cmpge_epu16(bound, d2);
good0 = (uint32_t)_mm256_movemask_epi8(tmp0);
good1 = (uint32_t)_mm256_movemask_epi8(tmp1);
good2 = (uint32_t)_mm256_movemask_epi8(tmp2);
good0 = _pext_u32(good0, 0x55555555);
good1 = _pext_u32(good1, 0x55555555);
good2 = _pext_u32(good2, 0x55555555);
pilo = _mm_loadl_epi64((__m128i *)&idx[good0 & 0xFF]);
pihi = _mm_loadl_epi64((__m128i *)&idx[(good0 >> 8) & 0xFF]);
pi0 = _mm256_castsi128_si256(pilo);
pi0 = _mm256_inserti128_si256(pi0, pihi, 1);
pilo = _mm_loadl_epi64((__m128i *)&idx[good1 & 0xFF]);
pihi = _mm_loadl_epi64((__m128i *)&idx[(good1 >> 8) & 0xFF]);
pi1 = _mm256_castsi128_si256(pilo);
pi1 = _mm256_inserti128_si256(pi1, pihi, 1);
pilo = _mm_loadl_epi64((__m128i *)&idx[good2 & 0xFF]);
pihi = _mm_loadl_epi64((__m128i *)&idx[(good2 >> 8) & 0xFF]);
pi2 = _mm256_castsi128_si256(pilo);
pi2 = _mm256_inserti128_si256(pi2, pihi, 1);
tmp0 = _mm256_add_epi8(pi0, ones);
tmp1 = _mm256_add_epi8(pi1, ones);
tmp2 = _mm256_add_epi8(pi2, ones);
pi0 = _mm256_unpacklo_epi8(pi0, tmp0);
pi1 = _mm256_unpacklo_epi8(pi1, tmp1);
pi2 = _mm256_unpacklo_epi8(pi2, tmp2);
d0 = _mm256_shuffle_epi8(d0, pi0);
d1 = _mm256_shuffle_epi8(d1, pi1);
d2 = _mm256_shuffle_epi8(d2, pi2);
/* Barrett reduction of (still unsigned) d values */
tmp0 = _mm256_mulhi_epu16(d0, v);
tmp1 = _mm256_mulhi_epu16(d1, v);
tmp2 = _mm256_mulhi_epu16(d2, v);
tmp0 = _mm256_srli_epi16(tmp0, 10);
tmp1 = _mm256_srli_epi16(tmp1, 10);
tmp2 = _mm256_srli_epi16(tmp2, 10);
tmp0 = _mm256_mullo_epi16(tmp0, kyberq);
tmp1 = _mm256_mullo_epi16(tmp1, kyberq);
tmp2 = _mm256_mullo_epi16(tmp2, kyberq);
d0 = _mm256_sub_epi16(d0, tmp0);
d1 = _mm256_sub_epi16(d1, tmp1);
d2 = _mm256_sub_epi16(d2, tmp2);
_mm_storeu_si128((__m128i *)&r[ctr], _mm256_castsi256_si128(d0));
ctr += (unsigned int)_mm_popcnt_u32(good0 & 0xFF);
_mm_storeu_si128((__m128i *)&r[ctr], _mm256_extracti128_si256(d0, 1));
ctr += (unsigned int)_mm_popcnt_u32((good0 >> 8) & 0xFF);
_mm_storeu_si128((__m128i *)&r[ctr], _mm256_castsi256_si128(d1));
ctr += (unsigned int)_mm_popcnt_u32(good1 & 0xFF);
_mm_storeu_si128((__m128i *)&r[ctr], _mm256_extracti128_si256(d1, 1));
ctr += (unsigned int)_mm_popcnt_u32((good1 >> 8) & 0xFF);
_mm_storeu_si128((__m128i *)&r[ctr], _mm256_castsi256_si128(d2));
ctr += (unsigned int)_mm_popcnt_u32(good2 & 0xFF);
_mm_storeu_si128((__m128i *)&r[ctr], _mm256_extracti128_si256(d2, 1));
ctr += (unsigned int)_mm_popcnt_u32((good2 >> 8) & 0xFF);
pos += 96;
}
while (ctr + 8 <= len && pos + 16 <= buflen) {
d = _mm_loadu_si128((__m128i *)&buf[pos]);
tmp = _mm_cmpge_epu16(_mm256_castsi256_si128(bound), d);
good0 = (uint32_t)_mm_movemask_epi8(tmp);
good0 = _pext_u32(good0, 0x55555555);
pilo = _mm_loadl_epi64((__m128i *)&idx[good0]);
pihi = _mm_add_epi8(pilo, _mm256_castsi256_si128(ones));
pilo = _mm_unpacklo_epi8(pilo, pihi);
d = _mm_shuffle_epi8(d, pilo);
/* Barrett reduction */
tmp = _mm_mulhi_epu16(d, _mm256_castsi256_si128(v));
tmp = _mm_srli_epi16(tmp, 10);
tmp = _mm_mullo_epi16(tmp, _mm256_castsi256_si128(kyberq));
d = _mm_sub_epi16(d, tmp);
_mm_storeu_si128((__m128i *)&r[ctr], d);
ctr += (unsigned int)_mm_popcnt_u32(good0);
pos += 16;
}
while (ctr < len && pos + 2 <= buflen) {
val = (uint16_t)(buf[pos] | ((uint16_t)buf[pos + 1] << 8));
pos += 2;
if (val < 19 * KYBER_Q) {
val -= ((int32_t)val * 20159 >> 26) * KYBER_Q;
r[ctr++] = (int16_t)val;
}
}
return ctr;
}
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