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SSE2 cv::Mat::dot

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This commit is contained in:
Ilya Lavrenov 2014-12-30 00:34:09 +03:00
parent 1bdd86edeb
commit f57136fd79
1 changed files with 46 additions and 1 deletions
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47
modules/core/src/matmul.cpp
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@ -3012,7 +3012,52 @@ static double dotProd_8s(const schar* src1, const schar* src2, int len)
int i = 0;
double r = 0.0;
#if CV_NEON
#if CV_SSE2
if( USE_SSE2 )
{
int j, len0 = len & -4, blockSize0 = (1 << 13), blockSize;
__m128i z = _mm_setzero_si128();
CV_DECL_ALIGNED(16) int buf[4];
while( i < len0 )
{
blockSize = std::min(len0 - i, blockSize0);
__m128i s = z;
j = 0;
for( ; j <= blockSize - 16; j += 16 )
{
__m128i b0 = _mm_loadu_si128((const __m128i*)(src1 + j));
__m128i b1 = _mm_loadu_si128((const __m128i*)(src2 + j));
__m128i s0, s1, s2, s3;
s0 = _mm_srai_epi16(_mm_unpacklo_epi8(b0, b0), 8);
s2 = _mm_srai_epi16(_mm_unpackhi_epi8(b0, b0), 8);
s1 = _mm_srai_epi16(_mm_unpacklo_epi8(b1, b1), 8);
s3 = _mm_srai_epi16(_mm_unpackhi_epi8(b1, b1), 8);
s0 = _mm_madd_epi16(s0, s1);
s2 = _mm_madd_epi16(s2, s3);
s = _mm_add_epi32(s, s0);
s = _mm_add_epi32(s, s2);
}
for( ; j < blockSize; j += 4 )
{
__m128i s0 = _mm_cvtsi32_si128(*(const int*)(src1 + j));
__m128i s1 = _mm_cvtsi32_si128(*(const int*)(src2 + j));
s0 = _mm_srai_epi16(_mm_unpacklo_epi8(s0, s0), 8);
s1 = _mm_srai_epi16(_mm_unpacklo_epi8(s1, s1), 8);
s0 = _mm_madd_epi16(s0, s1);
s = _mm_add_epi32(s, s0);
}
_mm_store_si128((__m128i*)buf, s);
r += buf[0] + buf[1] + buf[2] + buf[3];
src1 += blockSize;
src2 += blockSize;
i += blockSize;
}
}
#elif CV_NEON
int len0 = len & -8, blockSize0 = (1 << 14), blockSize;
int32x4_t v_zero = vdupq_n_s32(0);
CV_DECL_ALIGNED(16) int buf[4];