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SymmRowSmallVec_8u32s 1x5 general

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NEON speedup: 3.86x
Auto-vect speedup: 1.67x

Test kernel: [0.0708, 0.2445, 0.3694, 0.2445, 0.0708]
This commit is contained in:
orestis 2014-12-19 22:10:58 +02:00
parent cb48d7798d
commit c0019a42e4
1 changed files with 35 additions and 1 deletions
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36
modules/imgproc/src/filter.cpp
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@ -2311,7 +2311,41 @@ struct SymmRowSmallVec_8u32s
return 0; return 0;
else else
{ {
return 0; int32x4_t k32 = vdupq_n_s32(0);
k32 = vld1q_lane_s32(kx, k32, 0);
k32 = vld1q_lane_s32(kx + 1, k32, 1);
k32 = vld1q_lane_s32(kx + 2, k32, 2);
int16x4_t k = vqmovn_s32(k32);
uint8x8_t z = vdup_n_u8(0);
for( ; i <= width - 8; i += 8, src += 8 )
{
uint8x8_t x0, x1, x2, x3, x4;
x0 = vld1_u8( (uint8_t *) (src - cn) );
x1 = vld1_u8( (uint8_t *) (src) );
x2 = vld1_u8( (uint8_t *) (src + cn) );
int16x8_t y0, y1;
int32x4_t accl, acch;
y0 = vreinterpretq_s16_u16(vaddl_u8(x1, z));
y1 = vreinterpretq_s16_u16(vaddl_u8(x0, x2));
accl = vmull_lane_s16(vget_low_s16(y0), k, 0);
accl = vmlal_lane_s16(accl, vget_low_s16(y1), k, 1);
acch = vmull_lane_s16(vget_high_s16(y0), k, 0);
acch = vmlal_lane_s16(acch, vget_high_s16(y1), k, 1);
int16x8_t y2;
x3 = vld1_u8( (uint8_t *) (src - cn*2) );
x4 = vld1_u8( (uint8_t *) (src + cn*2) );
y2 = vreinterpretq_s16_u16(vaddl_u8(x3, x4));
accl = vmlal_lane_s16(accl, vget_low_s16(y2), k, 2);
acch = vmlal_lane_s16(acch, vget_high_s16(y2), k, 2);
vst1q_s32((int32_t *)(dst + i), accl);
vst1q_s32((int32_t *)(dst + i + 4), acch);
}
} }
} }
} }