83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
#if (( defined(__GNUC__) && __GNUC__ > 6 ) || (defined(__clang__) && __clang_major__ >= 6)) && defined(__AVX2__)
|
|
|
|
#define HAVE_SASUM_KERNEL 1
|
|
|
|
#include <immintrin.h>
|
|
#include <stdint.h>
|
|
|
|
#ifndef ABS_K
|
|
#define ABS_K(a) ((a) > 0 ? (a) : (-(a)))
|
|
#endif
|
|
|
|
static FLOAT sasum_kernel(BLASLONG n, FLOAT *x1)
|
|
{
|
|
BLASLONG i = 0;
|
|
FLOAT sumf = 0.0;
|
|
|
|
if (n >= 256) {
|
|
BLASLONG align_256 = ((32 - ((uintptr_t)x1 & (uintptr_t)0x1f)) >> 2) & 0x7;
|
|
|
|
for (i = 0; i < align_256; i++) {
|
|
sumf += ABS_K(x1[i]);
|
|
}
|
|
|
|
n -= align_256;
|
|
x1 += align_256;
|
|
}
|
|
|
|
BLASLONG tail_index_SSE = n&(~7);
|
|
BLASLONG tail_index_AVX2 = n&(~255);
|
|
|
|
if (n >= 256) {
|
|
__m256 accum_0, accum_1, accum_2, accum_3;
|
|
|
|
accum_0 = _mm256_setzero_ps();
|
|
accum_1 = _mm256_setzero_ps();
|
|
accum_2 = _mm256_setzero_ps();
|
|
accum_3 = _mm256_setzero_ps();
|
|
|
|
__m256i abs_mask = _mm256_set1_epi32(0x7fffffff);
|
|
for (i = 0; i < tail_index_AVX2; i += 32) {
|
|
accum_0 += (__m256)_mm256_and_si256(_mm256_load_si256((__m256i*)&x1[i+ 0]), abs_mask);
|
|
accum_1 += (__m256)_mm256_and_si256(_mm256_load_si256((__m256i*)&x1[i+ 8]), abs_mask);
|
|
accum_2 += (__m256)_mm256_and_si256(_mm256_load_si256((__m256i*)&x1[i+16]), abs_mask);
|
|
accum_3 += (__m256)_mm256_and_si256(_mm256_load_si256((__m256i*)&x1[i+24]), abs_mask);
|
|
}
|
|
|
|
accum_0 = accum_0 + accum_1 + accum_2 + accum_3;
|
|
__m128 half_accum0;
|
|
half_accum0 = _mm_add_ps(_mm256_extractf128_ps(accum_0, 0), _mm256_extractf128_ps(accum_0, 1));
|
|
|
|
half_accum0 = _mm_hadd_ps(half_accum0, half_accum0);
|
|
half_accum0 = _mm_hadd_ps(half_accum0, half_accum0);
|
|
|
|
sumf += half_accum0[0];
|
|
|
|
}
|
|
|
|
if (n >= 8) {
|
|
__m128 accum_20, accum_21;
|
|
accum_20 = _mm_setzero_ps();
|
|
accum_21 = _mm_setzero_ps();
|
|
|
|
__m128i abs_mask2 = _mm_set1_epi32(0x7fffffff);
|
|
for (i = tail_index_AVX2; i < tail_index_SSE; i += 8) {
|
|
accum_20 += (__m128)_mm_and_si128(_mm_loadu_si128((__m128i*)&x1[i + 0]), abs_mask2);
|
|
accum_21 += (__m128)_mm_and_si128(_mm_loadu_si128((__m128i*)&x1[i + 4]), abs_mask2);
|
|
}
|
|
|
|
accum_20 += accum_21;
|
|
accum_20 = _mm_hadd_ps(accum_20, accum_20);
|
|
accum_20 = _mm_hadd_ps(accum_20, accum_20);
|
|
|
|
sumf += accum_20[0];
|
|
}
|
|
|
|
for (i = tail_index_SSE; i < n; ++i) {
|
|
sumf += ABS_K(x1[i]);
|
|
}
|
|
|
|
return sumf;
|
|
}
|
|
#endif
|