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Remove handwritten saxpy because compilers optimize the second look anyway.

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This commit is contained in:
Tomasz Sobczyk
2020-11-25 20:37:38 +01:00
committed by nodchip
parent 15c528ca7b
commit 1c8495b54b
2 changed files with 5 additions and 46 deletions
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45
src/extra/stockfish_blas.cpp
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@@ -178,53 +178,11 @@ namespace Blas {
)
{
#if defined (USE_SSE2)
const __m128 alpha4 = _mm_set1_ps(alpha);
int i = 0;
for(; i < N - 15; i += 16)
{
__m128 x0 = _mm_loadu_ps(X + i + 0);
__m128 x1 = _mm_loadu_ps(X + i + 4);
__m128 x2 = _mm_loadu_ps(X + i + 8);
__m128 x3 = _mm_loadu_ps(X + i + 12);
__m128 y0 = _mm_loadu_ps(Y + i + 0);
__m128 y1 = _mm_loadu_ps(Y + i + 4);
__m128 y2 = _mm_loadu_ps(Y + i + 8);
__m128 y3 = _mm_loadu_ps(Y + i + 12);
x0 = _mm_mul_ps(x0, alpha4);
x1 = _mm_mul_ps(x1, alpha4);
x2 = _mm_mul_ps(x2, alpha4);
x3 = _mm_mul_ps(x3, alpha4);
x0 = _mm_add_ps(x0, y0);
x1 = _mm_add_ps(x1, y1);
x2 = _mm_add_ps(x2, y2);
x3 = _mm_add_ps(x3, y3);
_mm_storeu_ps(Y + i + 0, x0);
_mm_storeu_ps(Y + i + 4, x1);
_mm_storeu_ps(Y + i + 8, x2);
_mm_storeu_ps(Y + i + 12, x3);
}
for(; i < N; ++i)
{
Y[i] += X[i] * alpha;
}
#else
for(int i = 0; i < N; ++i)
{
Y[i] += X[i] * alpha;
}
#endif
}
void saxpy(
@@ -564,7 +522,8 @@ namespace Blas {
const __m128 alpha4 = _mm_set1_ps(alpha);
const __m128 beta4 = _mm_set1_ps(beta);
for (int m = 0; m < M - 1; m += 2)
int m = 0;
for (; m < M - 1; m += 2)
{
int n = 0;
for (; n < N - 3; n += 4)