mirror of
https://github.com/henrydcase/pqc.git
synced 2024-11-27 09:51:30 +00:00
431dbada45
Exported from SUPERCOP-20200826 using the scripts at: https://github.com/jschanck/pqclean-package-ntruprime
409 lines
14 KiB
C
409 lines
14 KiB
C
#include "crypto_decode_653x1541.h"
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#include <immintrin.h>
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/* auto-generated; do not edit */
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#define int16 int16_t
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#define int32 int32_t
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static inline int16 mullo(int16 x, int16 y) {
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return x * y;
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}
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static inline int16 mulhi(int16 x, int16 y) {
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return (x * (int32)y) >> 16;
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}
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static inline __m256i add(__m256i x, __m256i y) {
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return _mm256_add_epi16(x, y);
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}
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static inline __m256i sub(__m256i x, __m256i y) {
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return _mm256_sub_epi16(x, y);
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}
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static inline __m256i shiftleftconst(__m256i x, int16 y) {
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return _mm256_slli_epi16(x, y);
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}
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static inline __m256i signedshiftrightconst(__m256i x, int16 y) {
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return _mm256_srai_epi16(x, y);
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}
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static inline __m256i addconst(__m256i x, int16 y) {
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return add(x, _mm256_set1_epi16(y));
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}
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static inline __m256i subconst(__m256i x, int16 y) {
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return sub(x, _mm256_set1_epi16(y));
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}
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static inline __m256i mulloconst(__m256i x, int16 y) {
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return _mm256_mullo_epi16(x, _mm256_set1_epi16(y));
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}
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static inline __m256i mulhiconst(__m256i x, int16 y) {
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return _mm256_mulhi_epi16(x, _mm256_set1_epi16(y));
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}
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static inline __m256i ifgesubconst(__m256i x, int16 y) {
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__m256i y16 = _mm256_set1_epi16(y);
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__m256i top16 = _mm256_set1_epi16((int16)(y - 1));
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return sub(x, _mm256_cmpgt_epi16(x, top16) & y16);
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}
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static inline __m256i ifnegaddconst(__m256i x, int16 y) {
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return add(x, signedshiftrightconst(x, 15) & _mm256_set1_epi16(y));
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}
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void PQCLEAN_SNTRUP653_AVX2_crypto_decode_653x1541(void *v, const unsigned char *s) {
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int16 *R0 = v;
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int16 R1[327], R2[164], R3[82], R4[41], R5[21], R6[11], R7[6], R8[3], R9[2], R10[1];
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long long i;
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int16 a0, a1, a2;
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__m256i A0, A1, A2, S0, S1, B0, B1, C0, C1;
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s += PQCLEAN_SNTRUP653_AVX2_crypto_decode_653x1541_STRBYTES;
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a1 = 0;
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a1 += *--s; /* 0...255 */
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a1 = mulhi(a1, -48) - mulhi(mullo(a1, -6433), 2608);
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a1 += *--s; /* -1304...1558 */
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a1 += (a1 >> 15) & 2608; /* 0...2607 */
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R10[0] = a1;
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/* R10 ------> R9: reconstruct mod 1*[71]+[9402] */
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i = 0;
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s -= 1;
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a2 = a0 = R10[0];
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a0 = mulhi(a0, -13) - mulhi(mullo(a0, 25845), 71); /* -39...35 */
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a0 += s[1 * i + 0]; /* -39...290 */
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a0 = mulhi(a0, 3) - mulhi(mullo(a0, -923), 71); /* -36...35 */
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a0 += (a0 >> 15) & 71; /* 0...70 */
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a1 = (a2 << 8) + s[i] - a0;
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a1 = mullo(a1, -22153);
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/* invalid inputs might need reduction mod 9402 */
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a1 -= 9402;
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a1 += (a1 >> 15) & 9402;
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R9[0] = a0;
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R9[1] = a1;
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s -= 0;
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/* R9 ------> R8: reconstruct mod 2*[134]+[9402] */
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R8[2] = R9[1];
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s -= 1;
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for (i = 0; i >= 0; --i) {
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a2 = a0 = R9[i];
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a0 = mulhi(a0, 14) - mulhi(mullo(a0, 5869), 134); /* -67...70 */
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a0 += s[1 * i + 0]; /* -67...325 */
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a0 = mulhi(a0, 10) - mulhi(mullo(a0, -489), 134); /* -68...67 */
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a0 += (a0 >> 15) & 134; /* 0...133 */
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a1 = (a2 << 7) + ((s[i] - a0) >> 1);
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a1 = mullo(a1, 19563);
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/* invalid inputs might need reduction mod 134 */
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a1 -= 134;
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a1 += (a1 >> 15) & 134;
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R8[2 * i] = a0;
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R8[2 * i + 1] = a1;
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}
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/* R8 ------> R7: reconstruct mod 5*[2953]+[815] */
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i = 0;
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s -= 1;
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a2 = a0 = R8[2];
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a0 = mulhi(a0, 1223) - mulhi(mullo(a0, -5681), 2953); /* -1477...1782 */
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a0 += s[1 * i + 0]; /* -1477...2037 */
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a0 += (a0 >> 15) & 2953; /* 0...2952 */
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a1 = (a2 << 8) + s[i] - a0;
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a1 = mullo(a1, -9543);
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/* invalid inputs might need reduction mod 815 */
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a1 -= 815;
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a1 += (a1 >> 15) & 815;
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R7[4] = a0;
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R7[5] = a1;
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s -= 4;
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for (i = 1; i >= 0; --i) {
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a0 = R8[i];
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a0 = mulhi(a0, 1223) - mulhi(mullo(a0, -5681), 2953); /* -1477...1782 */
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a0 += s[2 * i + 1]; /* -1477...2037 */
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a0 = mulhi(a0, 1223) - mulhi(mullo(a0, -5681), 2953); /* -1505...1514 */
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a0 += s[2 * i + 0]; /* -1505...1769 */
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a0 += (a0 >> 15) & 2953; /* 0...2952 */
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a1 = (s[2 * i + 1] << 8) + s[2 * i] - a0;
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a1 = mullo(a1, -9543);
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/* invalid inputs might need reduction mod 2953 */
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a1 -= 2953;
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a1 += (a1 >> 15) & 2953;
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R7[2 * i] = a0;
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R7[2 * i + 1] = a1;
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}
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/* R7 ------> R6: reconstruct mod 10*[13910]+[815] */
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R6[10] = R7[5];
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s -= 10;
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for (i = 4; i >= 0; --i) {
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a2 = a0 = R7[i];
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a0 = mulhi(a0, 1756) - mulhi(mullo(a0, -1206), 13910); /* -6955...7394 */
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a0 += s[2 * i + 1]; /* -6955...7649 */
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a0 = mulhi(a0, 1756) - mulhi(mullo(a0, -1206), 13910); /* -7142...7159 */
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a0 += s[2 * i + 0]; /* -7142...7414 */
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a0 += (a0 >> 15) & 13910; /* 0...13909 */
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a1 = (a2 << 15) + (s[2 * i + 1] << 7) + ((s[2 * i] - a0) >> 1);
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a1 = mullo(a1, -13437);
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/* invalid inputs might need reduction mod 13910 */
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a1 -= 13910;
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a1 += (a1 >> 15) & 13910;
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R6[2 * i] = a0;
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R6[2 * i + 1] = a1;
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}
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/* R6 ------> R5: reconstruct mod 20*[1887]+[815] */
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R5[20] = R6[10];
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s -= 10;
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for (i = 9; i >= 0; --i) {
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a2 = a0 = R6[i];
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a0 = mulhi(a0, -101) - mulhi(mullo(a0, -8891), 1887); /* -969...943 */
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a0 += s[1 * i + 0]; /* -969...1198 */
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a0 += (a0 >> 15) & 1887; /* 0...1886 */
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a1 = (a2 << 8) + s[i] - a0;
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a1 = mullo(a1, 5279);
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/* invalid inputs might need reduction mod 1887 */
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a1 -= 1887;
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a1 += (a1 >> 15) & 1887;
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R5[2 * i] = a0;
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R5[2 * i + 1] = a1;
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}
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/* R5 ------> R4: reconstruct mod 40*[695]+[815] */
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R4[40] = R5[20];
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s -= 20;
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i = 4;
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for (;;) {
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A2 = A0 = _mm256_loadu_si256((__m256i *) &R5[i]);
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S0 = _mm256_cvtepu8_epi16(_mm_loadu_si128((__m128i *) (s + i)));
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A0 = sub(mulhiconst(A0, -84), mulhiconst(mulloconst(A0, -24140), 695)); /* -369...347 */
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A0 = add(A0, S0); /* -369...602 */
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A0 = ifnegaddconst(A0, 695); /* 0...694 */
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A1 = add(shiftleftconst(A2, 8), sub(S0, A0));
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A1 = mulloconst(A1, 31495);
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/* invalid inputs might need reduction mod 695 */
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A1 = ifgesubconst(A1, 695);
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/* A0: r0r2r4r6r8r10r12r14 r16r18r20r22r24r26r28r30 */
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/* A1: r1r3r5r7r9r11r13r15 r17r19r21r23r25r27r29r31 */
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B0 = _mm256_unpacklo_epi16(A0, A1);
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B1 = _mm256_unpackhi_epi16(A0, A1);
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/* B0: r0r1r2r3r4r5r6r7 r16r17r18r19r20r21r22r23 */
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/* B1: r8r9r10r11r12r13r14r15 r24r25r26r27r28r29r30r31 */
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C0 = _mm256_permute2x128_si256(B0, B1, 0x20);
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C1 = _mm256_permute2x128_si256(B0, B1, 0x31);
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/* C0: r0r1r2r3r4r5r6r7 r8r9r10r11r12r13r14r15 */
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/* C1: r16r17r18r19r20r21r22r23 r24r25r26r27r28r29r30r31 */
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_mm256_storeu_si256((__m256i *) (&R4[2 * i]), C0);
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_mm256_storeu_si256((__m256i *) (16 + &R4[2 * i]), C1);
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if (!i) {
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break;
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}
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i = -16 - ((~15) & -i);
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}
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/* R4 ------> R3: reconstruct mod 81*[6745]+[7910] */
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i = 0;
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s -= 2;
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a0 = R4[40];
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a0 = mulhi(a0, 2401) - mulhi(mullo(a0, -2487), 6745); /* -3373...3972 */
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a0 += s[2 * i + 1]; /* -3373...4227 */
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a0 = mulhi(a0, 2401) - mulhi(mullo(a0, -2487), 6745); /* -3497...3527 */
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a0 += s[2 * i + 0]; /* -3497...3782 */
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a0 += (a0 >> 15) & 6745; /* 0...6744 */
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a1 = (s[2 * i + 1] << 8) + s[2 * i] - a0;
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a1 = mullo(a1, -29207);
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/* invalid inputs might need reduction mod 7910 */
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a1 -= 7910;
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a1 += (a1 >> 15) & 7910;
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R3[80] = a0;
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R3[81] = a1;
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s -= 80;
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i = 24;
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for (;;) {
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A0 = _mm256_loadu_si256((__m256i *) &R4[i]);
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S0 = _mm256_loadu_si256((__m256i *) (s + 2 * i));
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S1 = _mm256_srli_epi16(S0, 8);
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S0 &= _mm256_set1_epi16(255);
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A0 = sub(mulhiconst(A0, 2401), mulhiconst(mulloconst(A0, -2487), 6745)); /* -3373...3972 */
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A0 = add(A0, S1); /* -3373...4227 */
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A0 = sub(mulhiconst(A0, 2401), mulhiconst(mulloconst(A0, -2487), 6745)); /* -3497...3527 */
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A0 = add(A0, S0); /* -3497...3782 */
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A0 = ifnegaddconst(A0, 6745); /* 0...6744 */
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A1 = add(shiftleftconst(S1, 8), sub(S0, A0));
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A1 = mulloconst(A1, -29207);
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/* invalid inputs might need reduction mod 6745 */
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A1 = ifgesubconst(A1, 6745);
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/* A0: r0r2r4r6r8r10r12r14 r16r18r20r22r24r26r28r30 */
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/* A1: r1r3r5r7r9r11r13r15 r17r19r21r23r25r27r29r31 */
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B0 = _mm256_unpacklo_epi16(A0, A1);
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B1 = _mm256_unpackhi_epi16(A0, A1);
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/* B0: r0r1r2r3r4r5r6r7 r16r17r18r19r20r21r22r23 */
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/* B1: r8r9r10r11r12r13r14r15 r24r25r26r27r28r29r30r31 */
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C0 = _mm256_permute2x128_si256(B0, B1, 0x20);
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C1 = _mm256_permute2x128_si256(B0, B1, 0x31);
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/* C0: r0r1r2r3r4r5r6r7 r8r9r10r11r12r13r14r15 */
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/* C1: r16r17r18r19r20r21r22r23 r24r25r26r27r28r29r30r31 */
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_mm256_storeu_si256((__m256i *) (&R3[2 * i]), C0);
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_mm256_storeu_si256((__m256i *) (16 + &R3[2 * i]), C1);
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if (!i) {
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break;
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}
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i = -16 - ((~15) & -i);
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}
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/* R3 ------> R2: reconstruct mod 163*[1314]+[1541] */
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i = 0;
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s -= 1;
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a2 = a0 = R3[81];
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a0 = mulhi(a0, 64) - mulhi(mullo(a0, -12768), 1314); /* -657...673 */
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a0 += s[1 * i + 0]; /* -657...928 */
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a0 += (a0 >> 15) & 1314; /* 0...1313 */
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a1 = (a2 << 7) + ((s[i] - a0) >> 1);
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a1 = mullo(a1, -399);
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/* invalid inputs might need reduction mod 1541 */
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a1 -= 1541;
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a1 += (a1 >> 15) & 1541;
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R2[162] = a0;
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R2[163] = a1;
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s -= 81;
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i = 65;
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for (;;) {
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A2 = A0 = _mm256_loadu_si256((__m256i *) &R3[i]);
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S0 = _mm256_cvtepu8_epi16(_mm_loadu_si128((__m128i *) (s + i)));
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A0 = sub(mulhiconst(A0, 64), mulhiconst(mulloconst(A0, -12768), 1314)); /* -657...673 */
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A0 = add(A0, S0); /* -657...928 */
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A0 = ifnegaddconst(A0, 1314); /* 0...1313 */
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A1 = add(shiftleftconst(A2, 7), signedshiftrightconst(sub(S0, A0), 1));
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A1 = mulloconst(A1, -399);
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/* invalid inputs might need reduction mod 1314 */
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A1 = ifgesubconst(A1, 1314);
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/* A0: r0r2r4r6r8r10r12r14 r16r18r20r22r24r26r28r30 */
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/* A1: r1r3r5r7r9r11r13r15 r17r19r21r23r25r27r29r31 */
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B0 = _mm256_unpacklo_epi16(A0, A1);
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B1 = _mm256_unpackhi_epi16(A0, A1);
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/* B0: r0r1r2r3r4r5r6r7 r16r17r18r19r20r21r22r23 */
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/* B1: r8r9r10r11r12r13r14r15 r24r25r26r27r28r29r30r31 */
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C0 = _mm256_permute2x128_si256(B0, B1, 0x20);
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C1 = _mm256_permute2x128_si256(B0, B1, 0x31);
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/* C0: r0r1r2r3r4r5r6r7 r8r9r10r11r12r13r14r15 */
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/* C1: r16r17r18r19r20r21r22r23 r24r25r26r27r28r29r30r31 */
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_mm256_storeu_si256((__m256i *) (&R2[2 * i]), C0);
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_mm256_storeu_si256((__m256i *) (16 + &R2[2 * i]), C1);
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if (!i) {
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break;
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}
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i = -16 - ((~15) & -i);
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}
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/* R2 ------> R1: reconstruct mod 326*[9277]+[1541] */
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R1[326] = R2[163];
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s -= 326;
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i = 147;
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for (;;) {
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A0 = _mm256_loadu_si256((__m256i *) &R2[i]);
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S0 = _mm256_loadu_si256((__m256i *) (s + 2 * i));
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S1 = _mm256_srli_epi16(S0, 8);
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S0 &= _mm256_set1_epi16(255);
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A0 = sub(mulhiconst(A0, 4400), mulhiconst(mulloconst(A0, -1808), 9277)); /* -4639...5738 */
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A0 = add(A0, S1); /* -4639...5993 */
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A0 = sub(mulhiconst(A0, 4400), mulhiconst(mulloconst(A0, -1808), 9277)); /* -4950...5040 */
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A0 = add(A0, S0); /* -4950...5295 */
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A0 = ifnegaddconst(A0, 9277); /* 0...9276 */
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A1 = add(shiftleftconst(S1, 8), sub(S0, A0));
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A1 = mulloconst(A1, -27883);
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/* invalid inputs might need reduction mod 9277 */
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A1 = ifgesubconst(A1, 9277);
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/* A0: r0r2r4r6r8r10r12r14 r16r18r20r22r24r26r28r30 */
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/* A1: r1r3r5r7r9r11r13r15 r17r19r21r23r25r27r29r31 */
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B0 = _mm256_unpacklo_epi16(A0, A1);
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B1 = _mm256_unpackhi_epi16(A0, A1);
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/* B0: r0r1r2r3r4r5r6r7 r16r17r18r19r20r21r22r23 */
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/* B1: r8r9r10r11r12r13r14r15 r24r25r26r27r28r29r30r31 */
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C0 = _mm256_permute2x128_si256(B0, B1, 0x20);
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C1 = _mm256_permute2x128_si256(B0, B1, 0x31);
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/* C0: r0r1r2r3r4r5r6r7 r8r9r10r11r12r13r14r15 */
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/* C1: r16r17r18r19r20r21r22r23 r24r25r26r27r28r29r30r31 */
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_mm256_storeu_si256((__m256i *) (&R1[2 * i]), C0);
|
|
_mm256_storeu_si256((__m256i *) (16 + &R1[2 * i]), C1);
|
|
if (!i) {
|
|
break;
|
|
}
|
|
i = -16 - ((~15) & -i);
|
|
}
|
|
|
|
/* R1 ------> R0: reconstruct mod 653*[1541] */
|
|
|
|
R0[652] = 3 * R1[326] - 2310;
|
|
s -= 326;
|
|
i = 310;
|
|
for (;;) {
|
|
A2 = A0 = _mm256_loadu_si256((__m256i *) &R1[i]);
|
|
S0 = _mm256_cvtepu8_epi16(_mm_loadu_si128((__m128i *) (s + i)));
|
|
A0 = sub(mulhiconst(A0, 349), mulhiconst(mulloconst(A0, -10887), 1541)); /* -771...857 */
|
|
A0 = add(A0, S0); /* -771...1112 */
|
|
A0 = ifnegaddconst(A0, 1541); /* 0...1540 */
|
|
A1 = add(shiftleftconst(A2, 8), sub(S0, A0));
|
|
A1 = mulloconst(A1, -10547);
|
|
|
|
/* invalid inputs might need reduction mod 1541 */
|
|
A1 = ifgesubconst(A1, 1541);
|
|
|
|
A0 = mulloconst(A0, 3);
|
|
A1 = mulloconst(A1, 3);
|
|
A0 = subconst(A0, 2310);
|
|
A1 = subconst(A1, 2310);
|
|
/* A0: r0r2r4r6r8r10r12r14 r16r18r20r22r24r26r28r30 */
|
|
/* A1: r1r3r5r7r9r11r13r15 r17r19r21r23r25r27r29r31 */
|
|
B0 = _mm256_unpacklo_epi16(A0, A1);
|
|
B1 = _mm256_unpackhi_epi16(A0, A1);
|
|
/* B0: r0r1r2r3r4r5r6r7 r16r17r18r19r20r21r22r23 */
|
|
/* B1: r8r9r10r11r12r13r14r15 r24r25r26r27r28r29r30r31 */
|
|
C0 = _mm256_permute2x128_si256(B0, B1, 0x20);
|
|
C1 = _mm256_permute2x128_si256(B0, B1, 0x31);
|
|
/* C0: r0r1r2r3r4r5r6r7 r8r9r10r11r12r13r14r15 */
|
|
/* C1: r16r17r18r19r20r21r22r23 r24r25r26r27r28r29r30r31 */
|
|
_mm256_storeu_si256((__m256i *) (&R0[2 * i]), C0);
|
|
_mm256_storeu_si256((__m256i *) (16 + &R0[2 * i]), C1);
|
|
if (!i) {
|
|
break;
|
|
}
|
|
i = -16 - ((~15) & -i);
|
|
}
|
|
}
|