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SymmRowSmallVec_8u32s [-1, 0, 1]

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NEON speedup: 1.84x
Auto-vect speedup: 1.2x
This commit is contained in:
orestis 2014-12-19 22:11:52 +02:00
parent c0019a42e4
commit 969a218057
1 changed files with 15 additions and 1 deletions
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16
modules/imgproc/src/filter.cpp
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@ -2355,7 +2355,21 @@ struct SymmRowSmallVec_8u32s
{
if( kx[0] == 0 && kx[1] == 1 )
{
return 0;
uint8x8_t z = vdup_n_u8(0);
for( ; i <= width - 8; i += 8, src += 8 )
{
uint8x8_t x0, x1;
x0 = vld1_u8( (uint8_t *) (src - cn) );
x1 = vld1_u8( (uint8_t *) (src + cn) );
int16x8_t y0;
y0 = vsubq_s16(vreinterpretq_s16_u16(vaddl_u8(x1, z)),
vreinterpretq_s16_u16(vaddl_u8(x0, z)));
vst1q_s32((int32_t *)(dst + i), vmovl_s16(vget_low_s16(y0)));
vst1q_s32((int32_t *)(dst + i + 4), vmovl_s16(vget_high_s16(y0)));
}
else
{
return 0;