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- /*
- This file is for functions related to 256-bit vectors
- including functions for bitsliced field operations
- */
-
- #include "vec256.h"
-
- extern void PQCLEAN_MCELIECE460896F_AVX_vec256_mul_asm(vec256 *, vec256 *, const vec256 *);
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_set1_16b(uint16_t a) {
- return _mm256_set1_epi16(a);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_setzero(void) {
- return _mm256_setzero_si256();
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_set4x(uint64_t a0, uint64_t a1, uint64_t a2, uint64_t a3) {
- return _mm256_set_epi64x(a3, a2, a1, a0);
- }
-
- int PQCLEAN_MCELIECE460896F_AVX_vec256_testz(vec256 a) {
- return _mm256_testz_si256(a, a);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_and(vec256 a, vec256 b) {
- return _mm256_and_si256(a, b);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_xor(vec256 a, vec256 b) {
- return _mm256_xor_si256(a, b);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_or(vec256 a, vec256 b) {
- return _mm256_or_si256(a, b);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_sll_4x(vec256 a, int s) {
- return _mm256_slli_epi64(a, s);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_srl_4x(vec256 a, int s) {
- return _mm256_srli_epi64(a, s);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_unpack_low(vec256 a, vec256 b) {
- return _mm256_permute2x128_si256 (a, b, 0x20);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_unpack_high(vec256 a, vec256 b) {
- return _mm256_permute2x128_si256 (a, b, 0x31);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_unpack_low_2x(vec256 a, vec256 b) {
- return _mm256_unpacklo_epi64 (a, b);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_unpack_high_2x(vec256 a, vec256 b) {
- return _mm256_unpackhi_epi64 (a, b);
- }
-
- vec256 PQCLEAN_MCELIECE460896F_AVX_vec256_or_reduce(const vec256 *a) {
- int i;
- vec256 ret;
-
- ret = a[0];
- for (i = 1; i < GFBITS; i++) {
- ret = PQCLEAN_MCELIECE460896F_AVX_vec256_or(ret, a[i]);
- }
-
- return ret;
- }
-
- void PQCLEAN_MCELIECE460896F_AVX_vec256_copy(vec256 *dest, const vec256 *src) {
- int i;
-
- for (i = 0; i < GFBITS; i++) {
- dest[i] = src[i];
- }
- }
-
-
- void PQCLEAN_MCELIECE460896F_AVX_vec256_mul(vec256 *h, vec256 *f, const vec256 *g) {
- PQCLEAN_MCELIECE460896F_AVX_vec256_mul_asm(h, f, g);
- }
-
- /* bitsliced field squarings */
- void PQCLEAN_MCELIECE460896F_AVX_vec256_sq(vec256 *out, const vec256 *in) {
- int i;
- vec256 result[GFBITS], t;
-
- t = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[11], in[12]);
-
- result[0] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[0], in[11]);
- result[1] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[7], t);
- result[2] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[1], in[7]);
- result[3] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[8], t);
- result[4] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[2], in[7]);
- result[4] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(result[4], in[8]);
- result[4] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(result[4], t);
- result[5] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[7], in[9]);
- result[6] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[3], in[8]);
- result[6] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(result[6], in[9]);
- result[6] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(result[6], in[12]);
- result[7] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[8], in[10]);
- result[8] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[4], in[9]);
- result[8] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(result[8], in[10]);
- result[9] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[9], in[11]);
- result[10] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[5], in[10]);
- result[10] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(result[10], in[11]);
- result[11] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[10], in[12]);
- result[12] = PQCLEAN_MCELIECE460896F_AVX_vec256_xor(in[6], t);
-
- for (i = 0; i < GFBITS; i++) {
- out[i] = result[i];
- }
- }
-
- /* bitsliced field inverses */
- void PQCLEAN_MCELIECE460896F_AVX_vec256_inv(vec256 *out, const vec256 *in) {
- vec256 tmp_11[ GFBITS ];
- vec256 tmp_1111[ GFBITS ];
-
- PQCLEAN_MCELIECE460896F_AVX_vec256_copy(out, in);
-
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_mul(tmp_11, out, in); // ^11
-
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, tmp_11);
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_mul(tmp_1111, out, tmp_11); // ^1111
-
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, tmp_1111);
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_mul(out, out, tmp_1111); // ^11111111
-
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out);
- PQCLEAN_MCELIECE460896F_AVX_vec256_mul(out, out, tmp_1111); // ^111111111111
-
- PQCLEAN_MCELIECE460896F_AVX_vec256_sq(out, out); // ^1111111111110
- }
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