dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2024-12-27 06:08:21 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

MIPS: dspr2: added optimization for function Select

Browse Source 
Change-Id: I22470d8b9ab8c5e90c5330ff12c9852676da1a3d
This commit is contained in:
Djordje Pesut 2014-11-07 09:44:16 +01:00
parent a3e79a46f6
commit 2f0e2ba826
1 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/dsp/lossless_mips_dsp_r2.c
View File

@ -200,6 +200,34 @@ static void SubtractGreenFromBlueAndRed(uint32_t* argb_data,
);
}
static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) {
int temp0, temp1, temp2, temp3, temp4, temp5;
__asm__ volatile (
"cmpgdu.lt.qb %[temp1], %[c], %[b] \n\t"
"pick.qb %[temp1], %[b], %[c] \n\t"
"pick.qb %[temp2], %[c], %[b] \n\t"
"cmpgdu.lt.qb %[temp4], %[c], %[a] \n\t"
"pick.qb %[temp4], %[a], %[c] \n\t"
"pick.qb %[temp5], %[c], %[a] \n\t"
"subu.qb %[temp3], %[temp1], %[temp2] \n\t"
"subu.qb %[temp0], %[temp4], %[temp5] \n\t"
"raddu.w.qb %[temp3], %[temp3] \n\t"
"raddu.w.qb %[temp0], %[temp0] \n\t"
"subu %[temp3], %[temp3], %[temp0] \n\t"
"slti %[temp0], %[temp3], 0x1 \n\t"
"movz %[a], %[b], %[temp0] \n\t"
: [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp0]"=&r"(temp0),
[a]"+&r"(a)
: [b]"r"(b), [c]"r"(c)
);
return a;
}
static uint32_t Predictor11(uint32_t left, const uint32_t* const top) {
return Select(top[0], left, top[-1]);
}
static uint32_t Predictor12(uint32_t left, const uint32_t* const top) {
return ClampedAddSubtractFull(left, top[0], top[-1]);
}
@ -218,6 +246,7 @@ void VP8LDspInitMIPSdspR2(void) {
#if defined(WEBP_USE_MIPS_DSP_R2)
VP8LMapColor32b = MapARGB;
VP8LMapColor8b = MapAlpha;
VP8LPredictors[11] = Predictor11;
VP8LPredictors[12] = Predictor12;
VP8LPredictors[13] = Predictor13;
VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed;