#include "crypto_verify_1039.h" #include <immintrin.h> int PQCLEAN_SNTRUP761_AVX2_crypto_verify_1039(const unsigned char *x, const unsigned char *y) { __m256i diff = _mm256_set1_epi8(0); unsigned int differentbits = 0; int i = PQCLEAN_SNTRUP761_AVX2_crypto_verify_1039_BYTES; i -= 32; for (;;) { do { __m256i x0 = _mm256_loadu_si256((__m256i *) x); __m256i y0 = _mm256_loadu_si256((__m256i *) y); diff |= x0 ^ y0; i -= 32; x += 32; y += 32; } while (i >= 0); if (i <= -32) { break; } x += i; y += i; } diff |= _mm256_srli_epi16(diff, 8); diff |= _mm256_srli_epi32(diff, 16); diff |= _mm256_srli_epi64(diff, 32); differentbits = (unsigned int) _mm256_extract_epi8(diff, 0); differentbits |= (unsigned int) _mm256_extract_epi8(diff, 8); differentbits |= (unsigned int) _mm256_extract_epi8(diff, 16); differentbits |= (unsigned int) _mm256_extract_epi8(diff, 24); return (int) (1 & ((differentbits - 1) >> 8)) - 1; }