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Use zip to replicate argb values out to 16 bits

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BUG=186
TEST=Shade
Review URL: https://webrtc-codereview.appspot.com/986004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@517 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2012-12-12 22:56:43 +00:00
parent 578c88a9f7
commit fa5d5fb491
1 changed files with 6 additions and 5 deletions
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11
source/row_neon.cc
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@ -2356,12 +2356,13 @@ void ARGBQuantizeRow_NEON(uint8* dst_argb, int scale, int interval_size,
// Shade 8 pixels at a time by specified value.
// NOTE vqrdmulh.s16 q10, q10, d0[0] must use a scaler register from 0 to 8.
// Rounding in vqrdmulh does +1 to high if high bit of low s16 is set.
void ARGBShadeRow_NEON(const uint8* src_argb, uint8* dst_argb, int width,
uint32 value) {
asm volatile (
"vdup.u32 q0, %3 \n" // duplicate scale value.
"vtrn.u8 d0, d1 \n" // d0 rrbb, d1 aagg
"vshr.u16 q0, q0, #1 \n" // scale / 2
"vzip.u8 d0, d1 \n" // d0 aarrggbb.
"vshr.u16 q0, q0, #1 \n" // scale / 2.
// 8 pixel loop.
".p2align 2 \n"
@ -2373,9 +2374,9 @@ void ARGBShadeRow_NEON(const uint8* src_argb, uint8* dst_argb, int width,
"vmovl.u8 q12, d24 \n"
"vmovl.u8 q13, d26 \n"
"vqrdmulh.s16 q10, q10, d0[0] \n" // b * scale * 2
"vqrdmulh.s16 q11, q11, d1[0] \n" // g
"vqrdmulh.s16 q12, q12, d0[1] \n" // r
"vqrdmulh.s16 q13, q13, d1[1] \n" // a
"vqrdmulh.s16 q11, q11, d0[1] \n" // g
"vqrdmulh.s16 q12, q12, d0[2] \n" // r
"vqrdmulh.s16 q13, q13, d0[3] \n" // a
"vqmovn.u16 d20, q10 \n"
"vqmovn.u16 d22, q11 \n"
"vqmovn.u16 d24, q12 \n"