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Merge pull request #8797 from sovrasov:hog_sse_fix

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This commit is contained in:
Vadim Pisarevsky 2017-05-29 14:32:46 +00:00
commit 89af053aed
1 changed files with 8 additions and 2 deletions
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10
modules/objdetect/src/hog.cpp
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@ -325,8 +325,14 @@ void HOGDescriptor::computeGradient(const Mat& img, Mat& grad, Mat& qangle,
#if CV_SSE2
__m128i ithree = _mm_set1_epi32(3);
for ( ; x <= end - 4; x += 4)
_mm_storeu_si128((__m128i*)(xmap + x), _mm_mullo_epi16(ithree,
_mm_loadu_si128((const __m128i*)(xmap + x))));
{
//emulation of _mm_mullo_epi32
__m128i mul_res = _mm_loadu_si128((const __m128i*)(xmap + x));
__m128i tmp1 = _mm_mul_epu32(ithree, mul_res);
__m128i tmp2 = _mm_mul_epu32( _mm_srli_si128(ithree,4), _mm_srli_si128(mul_res,4));
mul_res = _mm_unpacklo_epi32(_mm_shuffle_epi32(tmp1, _MM_SHUFFLE (0,0,2,0)), _mm_shuffle_epi32(tmp2, _MM_SHUFFLE (0,0,2,0)));
_mm_storeu_si128((__m128i*)(xmap + x), mul_res);
}
#elif CV_NEON
int32x4_t ithree = vdupq_n_s32(3);
for ( ; x <= end - 4; x += 4)