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bro_main.c
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bro_main.c
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/*
* ``Fast'' matrix multiplication in GF(2) for small dimensions
* Uses broadcast-based vectorized algorithms
* (See e.g. (Käsper and Schwabe, 2009) and (Augot et al., 2014) for illustrations)
*
* Pierre Karpman
* 2017-06--07
*/
#include <stdio.h>
#include <stdint.h>
#include <math.h>
#include <assert.h>
#include <sys/time.h>
#include <immintrin.h>
#include <m4ri/m4ri.h>
#include "hc128rand.h"
#include "bro_ska.h"
/*
* For custom randomization thru callback
*/
uint64_t my_little_rand(void *willignore)
{
return (((uint64_t)(hc128random()) << 32) ^ ((uint64_t)hc128random()));
}
/* no full checks yet */
void mul_bro_ska(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
{
unsigned acols = A->ncols;
unsigned vcols = V->ncols;
void(*bros[4])(mzd_t*, mzd_t*, mzd_t*, int) = {&mul_64_64_bro_ska, &mul_128_64_bro_ska, &mul_64_128_bro_ska, &mul_128_128_bro_ska};
unsigned fun = (((acols-1)/64)<<1)|((vcols-1)/64);
return bros[fun](res, V, A, clear);
// if ((acols <= 64) && (vcols <= 64))
// return mul_64_64_bro_ska(res, V, A, clear);
// if (acols <= 64)
// return mul_128_64_bro_ska(res, V, A, clear);
// if (vcols <= 64)
// return mul_64_128_bro_ska(res, V, A, clear);
// return mul_128_128_bro_ska(res, V, A, clear);
}
/* TODO Waiting to be moved elsewhere */
///* = 32 = */
//
///*
// * Same as above, but using SSE4.1
// * (lower version could be used in a rather similar way)
// */
//void mul_va3232_sse(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
// unsigned arows = A->nrows;
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
//// assert(vcols <= 32);
//// assert(arows == vcols);
//
// for (int j = 0; j < vrows; j++)
// {
//// uint64_t v = mzd_read_bits(V, j, 0, vcols);
// uint64_t v = *(V->rows[j]); // FIXME: always correct?
//
// __m128i m2, rr;
// __m128i acc = _mm_setzero_si128();
// __m128i m1 = _mm_set_epi32(1, 2, 4, 8);
// __m128i vv = _mm_set1_epi32(v);
//
// int i;
// /* main loop */
// for (i = 0; i < (int)(vcols-4); i+=4)
// {
//// rr = _mm_set_epi32(mzd_read_bits(A, i, 0, acols), mzd_read_bits(A, i+1, 0, acols), mzd_read_bits(A, i+2, 0, acols), mzd_read_bits(A, i+3, 0, acols));
// rr = _mm_set_epi32(*(A->rows[i]), *(A->rows[i+1]), *(A->rows[i+2]), *(A->rows[i+3])); // FIXME: always correct?
// m2 = _mm_and_si128(vv, m1);
// m2 = _mm_cmpeq_epi32(m1, m2);
// rr = _mm_and_si128(rr, m2);
// acc = _mm_xor_si128(acc, rr);
// m1 = _mm_slli_epi32(m1, 4);
// }
// /* footer */
//// uint32_t r0 = mzd_read_bits(A, i, 0, acols);
//// uint32_t r1 = i+1 >= arows ? 0 : mzd_read_bits(A, i+1, 0, acols);
//// uint32_t r2 = i+2 >= arows ? 0 : mzd_read_bits(A, i+2, 0, acols);
//// uint32_t r3 = i+3 >= arows ? 0 : mzd_read_bits(A, i+3, 0, acols);
// uint32_t r0 = *(A->rows[i]); // FIXME: always correct?
// uint32_t r1 = i+1 >= arows ? 0 : *(A->rows[i+1]); // FIXME: always correct?
// uint32_t r2 = i+2 >= arows ? 0 : *(A->rows[i+2]); // FIXME: always correct?
// uint32_t r3 = i+3 >= arows ? 0 : *(A->rows[i+3]); // FIXME: always correct?
// rr = _mm_set_epi32(r0, r1, r2, r3);
// m2 = _mm_and_si128(vv, m1);
// m2 = _mm_cmpeq_epi32(m1, m2);
// rr = _mm_and_si128(rr, m2);
// acc = _mm_xor_si128(acc, rr);
//
// if (clear)
// {
// mzd_and_bits(res, j, 0, acols, 0);
// }
// uint32_t tmpacc1 = _mm_extract_epi32(acc, 0) ^ _mm_extract_epi32(acc, 1);
// uint32_t tmpacc2 = _mm_extract_epi32(acc, 2) ^ _mm_extract_epi32(acc, 3);
// tmpacc1 ^= tmpacc2;
// mzd_xor_bits(res, j, 0, acols, tmpacc1);
// }
//
// return;
//}
//
///*
// * Same as above, but using AVX2
// */
//void mul_va3232_avx(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
// unsigned arows = A->nrows;
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
//// assert(vcols <= 32);
//// assert(arows == vcols);
//
//
// for (int j = 0; j < vrows; j++)
// {
//// uint64_t v = mzd_read_bits(V, j, 0, vcols);
// uint64_t v = *(V->rows[j]); // FIXME: always correct?
//
// __m256i m2, rr;
// __m256i acc = _mm256_setzero_si256();
// __m256i m1 = _mm256_set_epi32(1, 2, 4, 8, 16, 32, 64, 128);
// __m256i vv = _mm256_set1_epi32(v);
//
// /* main loop */
// int i;
// for (i = 0; i < (int)(vcols-8); i+=8)
// {
//// rr = _mm256_set_epi32(mzd_read_bits(A, i, 0, acols), mzd_read_bits(A, i+1, 0, acols), mzd_read_bits(A, i+2, 0, acols), mzd_read_bits(A, i+3, 0, acols),
//// mzd_read_bits(A, i+4, 0, acols), mzd_read_bits(A, i+5, 0, acols), mzd_read_bits(A, i+6, 0, acols), mzd_read_bits(A, i+7, 0, acols));
// rr = _mm256_set_epi32(*(A->rows[i]), *(A->rows[i+1]), *(A->rows[i+2]), *(A->rows[i+3]), *(A->rows[i+4]), *(A->rows[i+5]), *(A->rows[i+6]), *(A->rows[i+7])); // FIXME: always correct?
// m2 = _mm256_and_si256(vv, m1);
// m2 = _mm256_cmpeq_epi32(m1, m2);
// rr = _mm256_and_si256(rr, m2);
// acc = _mm256_xor_si256(acc, rr);
// m1 = _mm256_slli_epi32(m1, 8);
// }
// /* footer */
//// uint32_t r0 = mzd_read_bits(A, i, 0, acols);
//// uint32_t r1 = i+1 >= arows ? 0 : mzd_read_bits(A, i+1, 0, acols);
//// uint32_t r2 = i+2 >= arows ? 0 : mzd_read_bits(A, i+2, 0, acols);
//// uint32_t r3 = i+3 >= arows ? 0 : mzd_read_bits(A, i+3, 0, acols);
//// uint32_t r4 = i+4 >= arows ? 0 : mzd_read_bits(A, i+4, 0, acols);
//// uint32_t r5 = i+5 >= arows ? 0 : mzd_read_bits(A, i+5, 0, acols);
//// uint32_t r6 = i+6 >= arows ? 0 : mzd_read_bits(A, i+6, 0, acols);
//// uint32_t r7 = i+7 >= arows ? 0 : mzd_read_bits(A, i+7, 0, acols);
// uint32_t r0 = *(A->rows[i]); // FIXME: always correct?
// uint32_t r1 = i+1 >= arows ? 0 : *(A->rows[i+1]); // FIXME: always correct?
// uint32_t r2 = i+2 >= arows ? 0 : *(A->rows[i+2]); // FIXME: always correct?
// uint32_t r3 = i+3 >= arows ? 0 : *(A->rows[i+3]); // FIXME: always correct?
// uint32_t r4 = i+4 >= arows ? 0 : *(A->rows[i+4]); // FIXME: always correct?
// uint32_t r5 = i+5 >= arows ? 0 : *(A->rows[i+5]); // FIXME: always correct?
// uint32_t r6 = i+6 >= arows ? 0 : *(A->rows[i+6]); // FIXME: always correct?
// uint32_t r7 = i+7 >= arows ? 0 : *(A->rows[i+7]); // FIXME: always correct?
// rr = _mm256_set_epi32(r0, r1, r2, r3, r4, r5, r6, r7);
// m2 = _mm256_and_si256(vv, m1);
// m2 = _mm256_cmpeq_epi32(m1, m2);
// rr = _mm256_and_si256(rr, m2);
// acc = _mm256_xor_si256(acc, rr);
//
// if (clear)
// {
// mzd_and_bits(res, j, 0, acols, 0);
// }
// uint32_t tmpacc1 = _mm256_extract_epi32(acc, 0) ^ _mm256_extract_epi32(acc, 1);
// uint32_t tmpacc2 = _mm256_extract_epi32(acc, 2) ^ _mm256_extract_epi32(acc, 3);
// uint32_t tmpacc3 = _mm256_extract_epi32(acc, 4) ^ _mm256_extract_epi32(acc, 5);
// uint32_t tmpacc4 = _mm256_extract_epi32(acc, 6) ^ _mm256_extract_epi32(acc, 7);
// tmpacc1 ^= tmpacc2;
// tmpacc3 ^= tmpacc4;
// tmpacc1 ^= tmpacc3;
// mzd_xor_bits(res, j, 0, acols, tmpacc1);
// }
//
// return;
//}
//
///* = 64 */
//
///*
// * Same as above, but using SSE4.1
// * (lower version could be used in a rather similar way)
// */
//void mul_va6464_sse(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
// unsigned arows = A->nrows;
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
//// assert(vcols <= 64);
//// assert(arows == vcols);
//
// for (int j = 0; j < vrows; j++)
// {
//// uint64_t v = mzd_read_bits(V, j, 0, vcols);
// uint64_t v = *(V->rows[j]); // FIXME: always correct?
//
// __m128i m2, rr;
// __m128i acc = _mm_setzero_si128();
// __m128i m1 = _mm_set_epi64x(1, 2);
// __m128i vv = _mm_set1_epi64x(v);
//
// int i;
// /* main loop */
// for (i = 0; i < (int)(vcols-2); i+=2)
// {
//// rr = _mm_set_epi64x(mzd_read_bits(A, i, 0, acols), mzd_read_bits(A, i+1, 0, acols));
// rr = _mm_set_epi64x(*(A->rows[i]),*(A->rows[i+1])); // FIXME: always correct?
// m2 = _mm_and_si128(vv, m1);
// m2 = _mm_cmpeq_epi64(m1, m2);
// rr = _mm_and_si128(rr, m2);
// acc = _mm_xor_si128(acc, rr);
// m1 = _mm_slli_epi64(m1, 2);
// }
// /* footer */
//// uint64_t r0 = mzd_read_bits(A, i, 0, acols);
//// uint64_t r1 = i+1 >= arows ? 0 : mzd_read_bits(A, i+1, 0, acols);
// uint64_t r0 = *(A->rows[i]); // FIXME: always correct?
// uint64_t r1 = i+1 >= arows ? 0 : *(A->rows[i+1]); // FIXME : always correct?
// rr = _mm_set_epi64x(r0, r1);
//// rr = _mm_loadu_si128((__m128i*)A->rows[i]); // unfortunately, the matrix structure doesn't allow to do this much faster load
//// (not suitable for generic form anyway)
// m2 = _mm_and_si128(vv, m1);
// m2 = _mm_cmpeq_epi64(m1, m2);
// rr = _mm_and_si128(rr, m2);
// acc = _mm_xor_si128(acc, rr);
//
// if (clear)
// {
// mzd_and_bits(res, j, 0, acols, 0);
// }
// mzd_xor_bits(res, j, 0, acols, _mm_extract_epi64(acc, 0));
// mzd_xor_bits(res, j, 0, acols, _mm_extract_epi64(acc, 1));
// }
//
// return;
//}
//
///*
// * Same as above, but using AVX2
// */
//void mul_va6464_avx(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
// unsigned arows = A->nrows;
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
// // assert(vcols <= 64);
// // assert(arows == vcols);
//
// for (int j = 0; j < vrows; j++)
// {
//// uint64_t v = mzd_read_bits(V, j, 0, vcols);
// uint64_t v = *(V->rows[j]); // FIXME: always correct?
//
// __m256i m2, rr;
// __m256i acc = _mm256_setzero_si256();
// __m256i m1 = _mm256_set_epi64x(1, 2, 4, 8);
// __m256i vv = _mm256_set1_epi64x(v);
//
// int i;
// /* main loop */
// for (i = 0; i < (int)(vcols-4); i+=4)
// {
//// rr = _mm256_set_epi64x(mzd_read_bits(A, i, 0, 64), mzd_read_bits(A, i+1, 0, 64), mzd_read_bits(A, i+2, 0, 64), mzd_read_bits(A, i+3, 0, 64));
// // rr = _mm256_loadu_si256((__m256i*)(A->rows[i])); // unfortunately, the matrix structure doesn't allow to do this much faster load
// rr = _mm256_set_epi64x(*(A->rows[i]), *(A->rows[i+1]), *(A->rows[i+2]), *(A->rows[i+3])); // FIXME: always correct?
// // ditto
// m2 = _mm256_and_si256(vv, m1);
// m2 = _mm256_cmpeq_epi64(m1, m2);
// rr = _mm256_and_si256(rr, m2);
// acc = _mm256_xor_si256(acc, rr);
// m1 = _mm256_slli_epi64(m1, 4);
// }
// /* footer */
//// uint64_t r0 = mzd_read_bits(A, i, 0, acols);
//// uint64_t r1 = i+1 >= arows ? 0 : mzd_read_bits(A, i+1, 0, acols);
//// uint64_t r2 = i+2 >= arows ? 0 : mzd_read_bits(A, i+2, 0, acols);
//// uint64_t r3 = i+3 >= arows ? 0 : mzd_read_bits(A, i+3, 0, acols);
// uint64_t r0 = *(A->rows[i]); // FIXME: always correct?
// uint64_t r1 = i+1 >= arows ? 0 : *(A->rows[i+1]); // FIXME; always correct?
// uint64_t r2 = i+2 >= arows ? 0 : *(A->rows[i+2]); // FIXME; always correct;
// uint64_t r3 = i+3 >= arows ? 0 : *(A->rows[i+3]); // FIXME; always correct;
// rr = _mm256_set_epi64x(r0, r1, r2, r3);
// m2 = _mm256_and_si256(vv, m1);
// m2 = _mm256_cmpeq_epi64(m1, m2);
// rr = _mm256_and_si256(rr, m2);
// acc = _mm256_xor_si256(acc, rr);
//
// if (clear)
// {
// mzd_and_bits(res, j, 0, acols, 0);
// }
// uint64_t tmpacc1 = _mm256_extract_epi64(acc, 0) ^ _mm256_extract_epi64(acc, 1);
// uint64_t tmpacc2 = _mm256_extract_epi64(acc, 2) ^ _mm256_extract_epi64(acc, 3);
// tmpacc1 ^= tmpacc2;
// mzd_xor_bits(res, j, 0, acols, tmpacc1);
// }
//
// return;
//}
//
///* = 128 = */
//
///*
// * All input allocated
// * if clear, reset res before adding the result
// * Computes VxA, where A is at most 128x128
// * Warning: also needs V to have > 64 columns (otherwise, a smaller implementation is selected)
// * Warning: also needs A to have > 64 columns (otherwise, a smaller implementation is selected)
// */
//void mul_va128128_sse(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
//// unsigned arows = A->nrows;
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
// unsigned vcolhi = vcols - 64;
// unsigned acolhi = acols - 64;
//// assert(vcols <= 128);
//// assert(arows == vcols);
//
// for (int j = 0; j < vrows; j++)
// {
//// __m128i v = _mm_set_epi64x(mzd_read_bits(V, j, 64, vcolhi), mzd_read_bits(V, j, 0, 64));
// __m128i v = _mm_loadu_si128((__m128i*)V->rows[j]);
//
// __m128i m2, m3, rr2, rr3;
// __m128i acc = _mm_setzero_si128();
// __m128i m1 = _mm_set1_epi64x(1);
//
// for (int i = 0; i < 64; i++)
// {
//// rr2 = _mm_set_epi64x(mzd_read_bits(A, i, 64, acolhi), mzd_read_bits(A, i, 0, 64));
// rr2 = _mm_loadu_si128((__m128i*)A->rows[i]); // FIXME: always correct?
// m2 = _mm_and_si128(v, m1);
// m2 = _mm_cmpeq_epi64(m1, m2);
// if (i < vcolhi)
// {
//// rr3 = _mm_set_epi64x(mzd_read_bits(A, i+64, 64, acolhi), mzd_read_bits(A, i+64, 0, 64));
// rr3 = _mm_loadu_si128((__m128i*)A->rows[i+64]); // FIXME: always correct?
// m3 = _mm_shuffle_epi32(m2,0xFF);
// rr3 = _mm_and_si128(rr3, m3);
// acc = _mm_xor_si128(acc, rr3);
// }
// m2 = _mm_shuffle_epi32(m2,0x00);
// rr2 = _mm_and_si128(rr2, m2);
// acc = _mm_xor_si128(acc, rr2);
// m1 = _mm_slli_epi64(m1, 1);
// }
//
// if (clear)
// {
// mzd_and_bits(res, j, 0, 64, 0);
// mzd_and_bits(res, j, 64, acolhi, 0);
// }
// mzd_xor_bits(res, j, 0, 64, _mm_extract_epi64(acc, 0));
// mzd_xor_bits(res, j, 64, acolhi, _mm_extract_epi64(acc, 1));
// }
//
// return;
//}
//
///* same not generic as above */
//void mul_va128128_avx(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
// unsigned arows = A->nrows;
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
// unsigned vcolhi = vcols - 64;
// unsigned acolhi = acols - 64;
//// assert(vcols <= 128);
//// assert(arows == vcols);
//
// for (int j = 0; j < vrows; j++)
// {
//// __m128i v = _mm_set_epi64x(mzd_read_bits(V, j, 64, vcolhi), mzd_read_bits(V, j, 0, 64));
// __m128i v = _mm_loadu_si128((__m128i*)V->rows[j]); // FIXME: always correct?
//
// __m256i m2, m3, rr2, rr3;
// __m256i acc = _mm256_setzero_si256();
// __m256i m1 = _mm256_set_epi64x(2, 2, 1, 1);
// __m256i vv = _mm256_set_m128i(v, v);
// __m128i a0;
// __m128i a1;
//
// int i;
// /* main loop */
// for (i = 0; i < 62; i+=2)
// {
//// a0 = _mm_set_epi64x(mzd_read_bits(A, i, 64, acolhi), mzd_read_bits(A, i, 0, 64));
//// a1 = _mm_set_epi64x(mzd_read_bits(A, i+1, 64, acolhi), mzd_read_bits(A, i+1, 0, 64));
// a0 = _mm_loadu_si128((__m128i*)A->rows[i]); // FIXME: always correct?
// a1 = _mm_loadu_si128((__m128i*)A->rows[i+1]); // FIXME: always correct?
//
// rr2 = _mm256_set_m128i(a1, a0);
// m2 = _mm256_and_si256(vv, m1);
// m2 = _mm256_cmpeq_epi64(m1, m2);
// if (i < vcolhi)
// {
//// a0 = _mm_set_epi64x(mzd_read_bits(A, i+64, 64, acolhi), mzd_read_bits(A, i+64, 0, 64));
// a0 = _mm_loadu_si128((__m128i*)A->rows[i+64]); // FIXME: always correct?
// if (i+65 < arows)
// {
//// a1 = _mm_set_epi64x(mzd_read_bits(A, i+65, 64, acolhi), mzd_read_bits(A, i+65, 0, 64));
// a1 = _mm_loadu_si128((__m128i*)A->rows[i+65]); // FIXME: always correct?
// }
// else
// {
// a1 = _mm_setzero_si128();
// }
// rr3 = _mm256_set_m128i(a1, a0);
// m3 = _mm256_shuffle_epi32(m2,0xFF);
// rr3 = _mm256_and_si256(rr3, m3);
// acc = _mm256_xor_si256(acc, rr3);
// }
// m2 = _mm256_shuffle_epi32(m2,0x00);
// rr2 = _mm256_and_si256(rr2, m2);
// acc = _mm256_xor_si256(acc, rr2);
// m1 = _mm256_slli_epi64(m1, 2);
// }
// /* footer */
//// a0 = _mm_set_epi64x(mzd_read_bits(A, i, 64, acolhi), mzd_read_bits(A, i, 0, 64));
// a0 = _mm_loadu_si128((__m128i*)A->rows[i]); // FIXME: always correct?
// if (i+1 < arows)
// {
//// a1 = _mm_set_epi64x(mzd_read_bits(A, i+1, 64, acolhi), mzd_read_bits(A, i+1, 0, 64));
// a1 = _mm_loadu_si128((__m128i*)A->rows[i+1]); // FIXME: always correct?
// }
// else
// {
// a1 = _mm_setzero_si128();
// }
// rr2 = _mm256_set_m128i(a1, a0);
// m2 = _mm256_and_si256(vv, m1);
// m2 = _mm256_cmpeq_epi64(m1, m2);
// if (i < vcolhi)
// {
//// a0 = _mm_set_epi64x(mzd_read_bits(A, i+64, 64, acolhi), mzd_read_bits(A, i+64, 0, 64));
// a0 = _mm_loadu_si128((__m128i*)A->rows[i+64]); // FIXME: always correct?
// if (i+65 < arows)
// {
//// a1 = _mm_set_epi64x(mzd_read_bits(A, i+65, 64, acolhi), mzd_read_bits(A, i+65, 0, 64));
// a1 = _mm_loadu_si128((__m128i*)A->rows[i+65]); // FIXME: always correct?
// }
// else
// {
// a1 = _mm_setzero_si128();
// }
// rr3 = _mm256_set_m128i(a1, a0);
// m3 = _mm256_shuffle_epi32(m2,0xFF);
// rr3 = _mm256_and_si256(rr3, m3);
// acc = _mm256_xor_si256(acc, rr3);
// }
// m2 = _mm256_shuffle_epi32(m2,0x00);
// rr2 = _mm256_and_si256(rr2, m2);
// acc = _mm256_xor_si256(acc, rr2);
//
// if (clear)
// {
// mzd_and_bits(res, j, 0, 64, 0);
// mzd_and_bits(res, j, 64, acolhi, 0);
// }
// mzd_xor_bits(res, j, 0, 64, _mm256_extract_epi64(acc, 0));
// mzd_xor_bits(res, j, 64, acolhi, _mm256_extract_epi64(acc, 1));
// mzd_xor_bits(res, j, 0, 64, _mm256_extract_epi64(acc, 2));
// mzd_xor_bits(res, j, 64, acolhi, _mm256_extract_epi64(acc, 3));
// }
//
// return;
//}
//
///* = 256 = */
//
///* An SSE implem could also be added... */
//
///* Assumes that V->ncols and A->ncols > 128, otherwise a better implementation is selected */
///* FIXME Warning: also makes strong (stronger than above) assumptions about the matrix
// * format, namely that even if only 3 words are necessary (<= 192), a last one of padding
// * will always be here and we can load two 128-bit words */
//void mul_va256256_avx(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
//// unsigned arows = A->nrows;
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
// unsigned vcmid = 0;
// unsigned vchi = 0;
// unsigned acmid = 0;
// unsigned achi = 0;
//
// if (vcols > 192)
// {
// vchi = vcols - 192;
// vcmid = 64;
// }
// else
// {
// vcmid = vcols - 128;
// }
// if (acols > 192)
// {
// achi = acols - 192;
// acmid = 64;
// }
// else
// {
// acmid = acols - 128;
// }
//
// __m256i v;
//
//// assert(vcols <= 256);
//// assert(arows == vcols);
//
// for (int j = 0; j < vrows; j++)
// {
//
//// v = _mm256_set_epi64x(mzd_read_bits(V, j, 192, vchi), mzd_read_bits(V, j, 128, vcmid), mzd_read_bits(V, j, 64, 64), mzd_read_bits(V, j, 0, 64));
// v = _mm256_loadu_si256((__m256i*)V->rows[j]); // FIXME: always correct??
//
// __m256i m2, m3, m4, m5, rr2, rr3, rr4, rr5;
// __m256i acc = _mm256_setzero_si256();
// __m256i m1 = _mm256_set1_epi64x(1);
//
// for (int i = 0; i < 64; i++)
// {
//// rr2 = _mm256_set_epi64x(mzd_read_bits(A, i, 192, achi), mzd_read_bits(A, i, 128, acmid), mzd_read_bits(A, i, 64, 64), mzd_read_bits(A, i, 0, 64));
// rr2 = _mm256_loadu_si256((__m256i*)A->rows[i]); // FIXME: always correct??
// m2 = _mm256_and_si256(v, m1);
// m2 = _mm256_cmpeq_epi64(m1, m2);
//// rr3 = _mm256_set_epi64x(mzd_read_bits(A, i+64, 192, achi), mzd_read_bits(A, i+64, 128, acmid), mzd_read_bits(A, i+64, 64, 64), mzd_read_bits(A, i+64, 0, 64));
// rr3 = _mm256_loadu_si256((__m256i*)A->rows[i+64]); // FIXME: always correct??
// m3 = _mm256_permute4x64_epi64(m2, 0x55);
// rr3 = _mm256_and_si256(rr3, m3);
// acc = _mm256_xor_si256(acc, rr3);
// if (i < vcmid)
// {
//// rr4 = _mm256_set_epi64x(mzd_read_bits(A, i+128, 192, achi), mzd_read_bits(A, i+128, 128, acmid), mzd_read_bits(A, i+128, 64, 64), mzd_read_bits(A, i+128, 0, 64));
// rr4 = _mm256_loadu_si256((__m256i*)A->rows[i+128]); // FIXME: always correct??
// m4 = _mm256_permute4x64_epi64(m2, 0xAA);
// rr4 = _mm256_and_si256(rr4, m4);
// acc = _mm256_xor_si256(acc, rr4);
// }
// if (i < vchi)
// {
//// rr5 = _mm256_set_epi64x(mzd_read_bits(A, i+192, 192, achi), mzd_read_bits(A, i+192, 128, acmid), mzd_read_bits(A, i+192, 64, 64), mzd_read_bits(A, i+192, 0, 64));
// rr5 = _mm256_loadu_si256((__m256i*)A->rows[i+192]); // FIXME: always correct??
// m5 = _mm256_permute4x64_epi64(m2, 0xFF);
// rr5 = _mm256_and_si256(rr5, m5);
// acc = _mm256_xor_si256(acc, rr5);
// }
// m2 = _mm256_permute4x64_epi64(m2, 0x00);
// rr2 = _mm256_and_si256(rr2, m2);
// acc = _mm256_xor_si256(acc, rr2);
// m1 = _mm256_slli_epi64(m1, 1);
// }
// if (clear)
// {
// mzd_and_bits(res, j, 0, 64, 0);
// mzd_and_bits(res, j, 64, 64, 0);
// mzd_and_bits(res, j, 128, acmid, 0);
// if (achi)
// mzd_and_bits(res, j, 192, achi, 0);
// }
// mzd_xor_bits(res, j, 0, 64, _mm256_extract_epi64(acc, 0));
// mzd_xor_bits(res, j, 64, 64, _mm256_extract_epi64(acc, 1));
// mzd_xor_bits(res, j, 128, acmid, _mm256_extract_epi64(acc, 2));
// if (achi)
// mzd_xor_bits(res, j, 192, achi, _mm256_extract_epi64(acc, 3));
// }
//
// return;
//}
//
///*
// * Example of specialized function, as a model for future ones
// * assert(V->ncols > 224)
// * assert(V->ncols <= 256)
// * assert(A->ncols > 224)
// * assert(A->ncols <= 256)
// */
//void mul_224_224_bro_sse2(mzd_t *res, mzd_t *V, mzd_t *A, int clear)
//{
// unsigned acols = A->ncols;
// unsigned vcols = V->ncols;
// unsigned vrows = V->nrows;
// unsigned vc192 = vcols - 192;
// unsigned ac192 = acols - 192;
//
// __m128i vlo, vhi;
//
// for (int j = 0; j < vrows; j++)
// {
// __m128i acclo = _mm_setzero_si128();
// __m128i acchi = _mm_setzero_si128();
// __m128i ones = _mm_set1_epi32(1);
// __m128i m0, m00, m1, m2, m3, rl0, rh0, rl1, rh1, rl2, rh2, rl3, rh3;
//
//// vlo = _mm_set_epi64x(mzd_read_bits(V, j, 64, 64), mzd_read_bits(V, j, 0, 64));
// vlo = _mm_loadu_si128((__m128i*)V->rows[j]); // FIXME: always correct??
//// vhi = _mm_set_epi64x(mzd_read_bits(V, j, 192, vc192), mzd_read_bits(V, j, 128, 64));
// vhi = _mm_loadu_si128(((__m128i*)V->rows[j])+1); // FIXME: always correct??
//
// for (int i = 0; i < 32; i++)
// {
// /* 128 Lo V columns */
// m0 = _mm_and_si128(vlo, ones);
// m0 = _mm_cmpeq_epi32(ones, m0);
//
// m00 = _mm_shuffle_epi32(m0, 0x00);
//// rl0 = _mm_set_epi64x(mzd_read_bits(A, i, 64, 64), mzd_read_bits(A, i, 0, 64));
//// rh0 = _mm_set_epi64x(mzd_read_bits(A, i, 192, ac192), mzd_read_bits(A, i, 128, 64));
// rl0 = _mm_loadu_si128((__m128i*)A->rows[i]); // FIXME: always correct??
// rh0 = _mm_loadu_si128(((__m128i*)A->rows[i])+1); // FIXME: always correct??
// rl0 = _mm_and_si128(rl0, m00);
// rh0 = _mm_and_si128(rh0, m00);
//
// m1 = _mm_shuffle_epi32(m0, 0x55);
//// rl1 = _mm_set_epi64x(mzd_read_bits(A, i+32, 64, 64), mzd_read_bits(A, i+32, 0, 64));
//// rh1 = _mm_set_epi64x(mzd_read_bits(A, i+32, 192, ac192), mzd_read_bits(A, i+32, 128, 64));
// rl1 = _mm_loadu_si128((__m128i*)A->rows[i+32]); // FIXME: always correct??
// rh1 = _mm_loadu_si128(((__m128i*)A->rows[i+32])+1); // FIXME: always correct??
// rl1 = _mm_and_si128(rl1, m1);
// rh1 = _mm_and_si128(rh1, m1);
//
// m2 = _mm_shuffle_epi32(m0, 0xAA);
//// rl2 = _mm_set_epi64x(mzd_read_bits(A, i+64, 64, 64), mzd_read_bits(A, i+64, 0, 64));
//// rh2 = _mm_set_epi64x(mzd_read_bits(A, i+64, 192, ac192), mzd_read_bits(A, i+64, 128, 64));
// rl2 = _mm_loadu_si128((__m128i*)A->rows[i+64]); // FIXME: always correct??
// rh2 = _mm_loadu_si128(((__m128i*)A->rows[i+64])+1); // FIXME: always correct??
// rl2 = _mm_and_si128(rl2, m2);
// rh2 = _mm_and_si128(rh2, m2);
//
// m3 = _mm_shuffle_epi32(m0, 0xFF);
//// rl3 = _mm_set_epi64x(mzd_read_bits(A, i+96, 64, 64), mzd_read_bits(A, i+96, 0, 64));
//// rh3 = _mm_set_epi64x(mzd_read_bits(A, i+96, 192, ac192), mzd_read_bits(A, i+96, 128, 64));
// rl3 = _mm_loadu_si128((__m128i*)A->rows[i+96]); // FIXME: always correct??
// rh3 = _mm_loadu_si128(((__m128i*)A->rows[i+96])+1); // FIXME: always correct??
// rl3 = _mm_and_si128(rl3, m3);
// rh3 = _mm_and_si128(rh3, m3);
//
// rl1 = _mm_xor_si128(rl1, rl2);
// rh1 = _mm_xor_si128(rh1, rh2);
// rl0 = _mm_xor_si128(rl0, rl3);
// rh0 = _mm_xor_si128(rh0, rh3);
// acclo = _mm_xor_si128(rl0, acclo);
// acchi = _mm_xor_si128(rh0, acchi);
// acclo = _mm_xor_si128(rl1, acclo);
// acchi = _mm_xor_si128(rh1, acchi);
//
// /* 128 Hi V columns */
// m0 = _mm_and_si128(vhi, ones);
// m0 = _mm_cmpeq_epi32(ones, m0);
//
// m00 = _mm_shuffle_epi32(m0, 0x00);
//// rl0 = _mm_set_epi64x(mzd_read_bits(A, i+128, 64, 64), mzd_read_bits(A, i+128, 0, 64));
//// rh0 = _mm_set_epi64x(mzd_read_bits(A, i+128, 192, ac192), mzd_read_bits(A, i+128, 128, 64));
// rl0 = _mm_loadu_si128((__m128i*)A->rows[i+128]); // FIXME: always correct??
// rh0 = _mm_loadu_si128(((__m128i*)A->rows[i+128])+1); // FIXME: always correct??
// rl0 = _mm_and_si128(rl0, m00);
// rh0 = _mm_and_si128(rh0, m00);
//
// m1 = _mm_shuffle_epi32(m0, 0x55);
//// rl1 = _mm_set_epi64x(mzd_read_bits(A, i+160, 64, 64), mzd_read_bits(A, i+160, 0, 64));
//// rh1 = _mm_set_epi64x(mzd_read_bits(A, i+160, 192, ac192), mzd_read_bits(A, i+160, 128, 64));
// rl1 = _mm_loadu_si128((__m128i*)A->rows[i+160]); // FIXME: always correct??
// rh1 = _mm_loadu_si128(((__m128i*)A->rows[i+160])+1); // FIXME: always correct??
// rl1 = _mm_and_si128(rl1, m1);
// rh1 = _mm_and_si128(rh1, m1);
//
// m2 = _mm_shuffle_epi32(m0, 0xAA);
//// rl2 = _mm_set_epi64x(mzd_read_bits(A, i+192, 64, 64), mzd_read_bits(A, i+192, 0, 64));
//// rh2 = _mm_set_epi64x(mzd_read_bits(A, i+192, 192, ac192), mzd_read_bits(A, i+192, 128, 64));
// rl2 = _mm_loadu_si128((__m128i*)A->rows[i+192]); // FIXME: always correct??
// rh2 = _mm_loadu_si128(((__m128i*)A->rows[i+192])+1); // FIXME: always correct??
// rl2 = _mm_and_si128(rl2, m2);
// rh2 = _mm_and_si128(rh2, m2);
//
// if (i+224 < vcols) // vcols for arows
// {
// m3 = _mm_shuffle_epi32(m0, 0xFF);
//// rl3 = _mm_set_epi64x(mzd_read_bits(A, i+224, 64, 64), mzd_read_bits(A, i+224, 0, 64));
//// rh3 = _mm_set_epi64x(mzd_read_bits(A, i+224, 192, ac192), mzd_read_bits(A, i+224, 128, 64));
// rl3 = _mm_loadu_si128((__m128i*)A->rows[i+224]); // FIXME: always correct??
// rh3 = _mm_loadu_si128(((__m128i*)A->rows[i+224])+1); // FIXME: always correct??
// rl3 = _mm_and_si128(rl3, m3);
// rh3 = _mm_and_si128(rh3, m3);
// acclo = _mm_xor_si128(rl3, acclo);
// acchi = _mm_xor_si128(rh3, acchi);
// }
//
// rl1 = _mm_xor_si128(rl1, rl2);
// rh1 = _mm_xor_si128(rh1, rh2);
// acclo = _mm_xor_si128(rl0, acclo);
// acchi = _mm_xor_si128(rh0, acchi);
// acclo = _mm_xor_si128(rl1, acclo);
// acchi = _mm_xor_si128(rh1, acchi);
//
// ones = _mm_slli_epi32(ones, 1);
// }
//
// if (clear)
// {
// mzd_and_bits(res, j, 0, 64, 0);
// mzd_and_bits(res, j, 64, 64, 0);
// mzd_and_bits(res, j, 128, 64, 0);
// mzd_and_bits(res, j, 192, ac192, 0);
// }
//// mzd_xor_bits(res, j, 0, 64, _mm_extract_epi64(acclo, 0));
//// mzd_xor_bits(res, j, 64, 64, _mm_extract_epi64(acclo, 1));
//// mzd_xor_bits(res, j, 128, 64, _mm_extract_epi64(acchi, 0));
//// mzd_xor_bits(res, j, 192, ac192, _mm_extract_epi64(acchi, 1));
// // for full SSE2 compatibility; only a moderate slowdown from _mm_extract_epi_64
// mzd_xor_bits(res, j, 0, 16, _mm_extract_epi16(acclo, 0));
// mzd_xor_bits(res, j, 16, 16, _mm_extract_epi16(acclo, 1));
// mzd_xor_bits(res, j, 32, 16, _mm_extract_epi16(acclo, 2));
// mzd_xor_bits(res, j, 48, 16, _mm_extract_epi16(acclo, 3));
// mzd_xor_bits(res, j, 64, 16, _mm_extract_epi16(acclo, 4));
// mzd_xor_bits(res, j, 80, 16, _mm_extract_epi16(acclo, 5));
// mzd_xor_bits(res, j, 96, 16, _mm_extract_epi16(acclo, 6));
// mzd_xor_bits(res, j, 112, 16, _mm_extract_epi16(acclo, 7));
// mzd_xor_bits(res, j, 128, 16, _mm_extract_epi16(acchi, 0));
// mzd_xor_bits(res, j, 144, 16, _mm_extract_epi16(acchi, 1));
// mzd_xor_bits(res, j, 160, 16, _mm_extract_epi16(acchi, 2));
// mzd_xor_bits(res, j, 176, 16, _mm_extract_epi16(acchi, 3));
// mzd_xor_bits(res, j, 192, 16, _mm_extract_epi16(acchi, 4)); // FIXME: assume leftover is always zero... correct?
// mzd_xor_bits(res, j, 208, 16, _mm_extract_epi16(acchi, 5)); // ditto
// mzd_xor_bits(res, j, 224, 16, _mm_extract_epi16(acchi, 6)); // ditto
// mzd_xor_bits(res, j, 240, 16, _mm_extract_epi16(acchi, 7)); // ditto
// }
//
// return;
//}
/*
* TESTS
*/
/* = 32 = */
//void test_speed_32(unsigned iter)
//{
// struct timeval tv1, tv2;
// uint64_t tusec;
// mzd_t *x, *y, *a;
//
// x = mzd_init(32, 32);
// y = mzd_init(32, 32);
// a = mzd_init(32, 32);
//
// mzd_randomize_custom(x, &my_little_rand, NULL);
// mzd_randomize_custom(a, &my_little_rand, NULL);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va3232_avx(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 32 w AVX:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va3232_sse(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 32 w SSE:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va3232_std(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 32 w/o SSE:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va6464_std(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 32(64) w/o SSE:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mzd_mul_m4rm(y, x, a, 0);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("M4RI:\t\t\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// return;
//}
//
///* = 64 = */
//
//void test_speed_64(unsigned iter)
//{
// struct timeval tv1, tv2;
// uint64_t tusec;
// mzd_t *x, *y, *a;
//
// x = mzd_init(64, 64);
// y = mzd_init(64, 64);
// a = mzd_init(64, 64);
//
// mzd_randomize_custom(x, &my_little_rand, NULL);
// mzd_randomize_custom(a, &my_little_rand, NULL);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va6464_avx(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 64 w AVX:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va6464_sse(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 64 w SSE:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va6464_std(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 64 w/o SSE:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mzd_mul_m4rm(y, x, a, 0);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("M4RI:\t\t\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// return;
//}
//
///* = 128 */
//
//void test_correc_full_128(int tries)
//{
// mzd_t *x, *a;
// mzd_t *ym4r, *ystd, *ysse, *yavx;
//
// for (int c1 = 65; c1 <= 128; c1++)
// {
// for (int r = 1; r <= 1; r++)
// {
// for (int c2 = 65; c2 <= 128; c2++)
// {
// x = mzd_init(r, c1);
// a = mzd_init(c1, c2);
// ym4r = mzd_init(r, c2);
// ystd = mzd_init(r, c2);
// ysse = mzd_init(r, c2);
// yavx = mzd_init(r, c2);
//
// int avxg = 1;
// int sseg = 1;
// int stdg = 1;
//
// for (int i = 0; i < tries; i++)
// {
// mzd_randomize_custom(x, &my_little_rand, NULL);
// mzd_randomize_custom(a, &my_little_rand, NULL);
//
// mul_va128128_avx(yavx, x, a, 1);
// mul_va128128_sse(ysse, x, a, 1);
// mul_va128128_std(ystd, x, a, 1);
// mzd_mul_m4rm(ym4r, x, a, 0);
//
// avxg = mzd_cmp(yavx, ym4r) == 0 ? avxg : 0;
// sseg = mzd_cmp(ysse, ym4r) == 0 ? sseg : 0;
// stdg = mzd_cmp(ystd, ym4r) == 0 ? stdg : 0;
// }
// if (!stdg)
// printf("[%dx%d X %dx%d (#%d)] STD: BAD\n", r, c1, c1, c2, tries);
// if (!sseg)
// printf("[%dx%d X %dx%d (#%d)] SSE: BAD\n", r, c1, c1, c2, tries);
// if (!avxg)
// printf("[%dx%d X %dx%d (#%d)] AVX: BAD\n", r, c1, c1, c2, tries);
// }
// }
// }
// printf("Full 128... done\n");
//
// return;
//}
//
//void test_speed_128(unsigned iter)
//{
// struct timeval tv1, tv2;
// uint64_t tusec;
// mzd_t *x, *y, *a;
//
// x = mzd_init(128, 128);
// y = mzd_init(128, 128);
// a = mzd_init(128, 128);
//
// mzd_randomize_custom(x, &my_little_rand, NULL);
// mzd_randomize_custom(a, &my_little_rand, NULL);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va128128_avx(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 128 w AVX:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va128128_sse(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 128 w SSE:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mul_va128128_std(y, x, a, 1);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("`Fast' 128 w/o SSE:\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// gettimeofday(&tv1, NULL);
// for (unsigned i = 0; i < iter; i++)
// mzd_mul_m4rm(y, x, a, 0);
// gettimeofday(&tv2, NULL);
// tusec = ((1000000*tv2.tv_sec + tv2.tv_usec) - (1000000*tv1.tv_sec + tv1.tv_usec));
// printf("M4RI:\t\t\t %llu usecs (#%u) [%f usecs/op]\n", tusec, iter, (double)tusec / (double)iter);
//
// return;
//}
//
///* = 256 */
//
//void test_correc_full_256(int tries)
//{
// mzd_t *x, *a;
// mzd_t *ym4r, *yavx, *ysse;
//
// for (int c1 = 225; c1 <= 256; c1++)
// {
// for (int r = 1; r <= 1; r++)
// {
// for (int c2 = 225; c2 <= 256; c2++)
// {
// x = mzd_init(r, c1);
// a = mzd_init(c1, c2);
// ym4r = mzd_init(r, c2);
// yavx = mzd_init(r, c2);
// ysse = mzd_init(r, c2);
//
// int avxg = 1;
// int sseg = 1;
//
// for (int i = 0; i < tries; i++)
// {
// mzd_randomize_custom(x, &my_little_rand, NULL);
// mzd_randomize_custom(a, &my_little_rand, NULL);
//
// mul_va256256_avx(yavx, x, a, 1);
// mul_224_224_bro_sse2(ysse, x, a, 1);
// mzd_mul_m4rm(ym4r, x, a, 0);
//
// avxg = mzd_cmp(yavx, ym4r) == 0 ? avxg : 0;
// sseg = mzd_cmp(ysse, ym4r) == 0 ? sseg : 0;
// }
// if (!avxg)
// printf("[%dx%d X %dx%d (#%d)] AVX: BAD\n", r, c1, c1, c2, tries);
// if (!sseg)
// printf("[%dx%d X %dx%d (#%d)] SSE: BAD\n", r, c1, c1, c2, tries);
// }
// }
// }
// printf("Full 256... done\n");
//
// return;
//}
//
//void test_speed_256(unsigned iter)
//{
// struct timeval tv1, tv2;