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Refactor column integral projection computation

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Move the scaling factor outside column projection. This avoids
repeated calculation of the same scaling factor. Profiling shows
that the percentage of vp9_int_pro_col_sse2 of overall cycles
goes from 2.29% down to 1.88%.

Change-Id: I5ac4e324ab2d7f33ba2de66dd2a12e04e04dfd66
This commit is contained in:
Jingning Han 2015-03-16 12:03:31 -07:00
parent 7cf383d17f
commit 2cfddec332
2 changed files with 4 additions and 4 deletions
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5
vp9/encoder/vp9_mcomp.c
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@ -1805,6 +1805,7 @@ unsigned int vp9_int_pro_motion_estimation(const VP9_COMP *cpi, MACROBLOCK *x,
MV *tmp_mv = &xd->mi[0].src_mi->mbmi.mv[0].as_mv;
unsigned int best_sad, tmp_sad, this_sad[4];
MV this_mv;
const int norm_factor = 3 + (bw >> 5);
#if CONFIG_VP9_HIGHBITDEPTH
tmp_mv->row = 0;
@ -1822,7 +1823,7 @@ unsigned int vp9_int_pro_motion_estimation(const VP9_COMP *cpi, MACROBLOCK *x,
ref_buf = xd->plane[0].pre[0].buf - (bh >> 1) * ref_stride;
for (idx = 0; idx < search_height; ++idx) {
vbuf[idx] = vp9_int_pro_col(ref_buf, bw);
vbuf[idx] = vp9_int_pro_col(ref_buf, bw) >> norm_factor;
ref_buf += ref_stride;
}
@ -1834,7 +1835,7 @@ unsigned int vp9_int_pro_motion_estimation(const VP9_COMP *cpi, MACROBLOCK *x,
src_buf = x->plane[0].src.buf;
for (idx = 0; idx < bh; ++idx) {
src_vbuf[idx] = vp9_int_pro_col(src_buf, bw);
src_vbuf[idx] = vp9_int_pro_col(src_buf, bw) >> norm_factor;
src_buf += src_stride;
}

3
vp9/encoder/x86/vp9_avg_intrin_sse2.c
View File

@ -112,7 +112,6 @@ int16_t vp9_int_pro_col_sse2(uint8_t const *ref, const int width) {
__m128i s0 = _mm_sad_epu8(src_line, zero);
__m128i s1;
int i;
const int norm_factor = 3 + (width >> 5);
for (i = 16; i < width; i += 16) {
ref += 16;
@ -124,7 +123,7 @@ int16_t vp9_int_pro_col_sse2(uint8_t const *ref, const int width) {
s1 = _mm_srli_si128(s0, 8);
s0 = _mm_adds_epu16(s0, s1);
return _mm_extract_epi16(s0, 0) >> norm_factor;
return _mm_extract_epi16(s0, 0);
}
int vp9_vector_var_sse2(int16_t const *ref, int16_t const *src,