mirror/opencv
1
0
Fork 0
mirror of https://github.com/opencv/opencv.git synced 2025-01-18 22:44:02 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge pull request #2929 from ilya-lavrenov:sse_pow

Browse Source
This commit is contained in:
Vadim Pisarevsky 2014-07-07 11:22:26 +00:00
commit e1553d5da3
1 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
modules/core/src/mathfuncs.cpp
View File

@ -348,7 +348,18 @@ static void InvSqrt_32f(const float* src, float* dst, int len)
static void InvSqrt_64f(const double* src, double* dst, int len)
{
for( int i = 0; i < len; i++ )
int i = 0;
#if CV_SSE2
if (USE_SSE2)
{
__m128d v_1 = _mm_set1_pd(1.0);
for ( ; i <= len - 2; i += 2)
_mm_storeu_pd(dst + i, _mm_div_pd(v_1, _mm_sqrt_pd(_mm_loadu_pd(src + i))));
}
#endif
for( ; i < len; i++ )
dst[i] = 1/std::sqrt(src[i]);
}