70543bba37
Exported from SUPERCOP-20200826 using the scripts at: https://github.com/jschanck/pqclean-package-ntruprime
32 lines
881 B
C
32 lines
881 B
C
#include "crypto_encode_857xfreeze3.h"
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#include <immintrin.h>
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#define int16 int16_t
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#define p 857
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void PQCLEAN_SNTRUP857_AVX2_crypto_encode_857xfreeze3(unsigned char *s, const void *v) {
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const int16 *r = v;
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int i = p - 16;
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for (;;) {
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do {
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__m256i x = _mm256_loadu_si256((__m256i *) r);
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__m256i y = _mm256_mulhrs_epi16(x, _mm256_set1_epi16(10923));
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x = _mm256_sub_epi16(x, y);
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y = _mm256_add_epi16(y, y);
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x = _mm256_sub_epi16(x, y);
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__m128i x0 = _mm256_extractf128_si256(x, 0);
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__m128i x1 = _mm256_extractf128_si256(x, 1);
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_mm_storeu_si128((__m128i *) s, _mm_packs_epi16(x0, x1));
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i -= 16;
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r += 16;
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s += 16;
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} while (i >= 0);
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if (i <= -16) {
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break;
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}
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r += i;
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s += i;
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}
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}
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