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MIPS: dspr2: Added optimization for MultARGBRow function

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Change-Id: Ide549ae0d80413bea8c19fe091d97bffe8b17985
This commit is contained in:
Djordje Pesut 2014-12-22 13:51:22 +01:00
parent 5487529368
commit 7d850f7b9a
1 changed files with 46 additions and 0 deletions
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46
src/dsp/alpha_processing_mips_dsp_r2.c
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@ -79,6 +79,51 @@ static int DispatchAlpha(const uint8_t* alpha, int alpha_stride,
return (alpha_mask != 0xff);
}
static void MultARGBRow(uint32_t* const ptr, int width, int inverse) {
int x;
const uint32_t c_00ffffff = 0x00ffffffu;
const uint32_t c_ff000000 = 0xff000000u;
const uint32_t c_8000000 = 0x00800000u;
const uint32_t c_8000080 = 0x00800080u;
for (x = 0; x < width; ++x) {
const uint32_t argb = ptr[x];
if (argb < 0xff000000u) { // alpha < 255
if (argb <= 0x00ffffffu) { // alpha == 0
ptr[x] = 0;
} else {
int temp0, temp1, temp2, temp3, alpha;
__asm__ volatile (
"srl %[alpha], %[argb], 24 \n\t"
"replv.qb %[temp0], %[alpha] \n\t"
"and %[temp0], %[temp0], %[c_00ffffff] \n\t"
"beqz %[inverse], 0f \n\t"
"divu $zero, %[c_ff000000], %[alpha] \n\t"
"mflo %[temp0] \n\t"
"0: \n\t"
"andi %[temp1], %[argb], 0xff \n\t"
"ext %[temp2], %[argb], 8, 8 \n\t"
"ext %[temp3], %[argb], 16, 8 \n\t"
"mul %[temp1], %[temp1], %[temp0] \n\t"
"mul %[temp2], %[temp2], %[temp0] \n\t"
"mul %[temp3], %[temp3], %[temp0] \n\t"
"precrq.ph.w %[temp1], %[temp2], %[temp1] \n\t"
"addu %[temp3], %[temp3], %[c_8000000] \n\t"
"addu %[temp1], %[temp1], %[c_8000080] \n\t"
"precrq.ph.w %[temp3], %[argb], %[temp3] \n\t"
"precrq.qb.ph %[temp1], %[temp3], %[temp1] \n\t"
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
[temp3]"=&r"(temp3), [alpha]"=&r"(alpha)
: [inverse]"r"(inverse), [c_00ffffff]"r"(c_00ffffff),
[c_8000000]"r"(c_8000000), [c_8000080]"r"(c_8000080),
[c_ff000000]"r"(c_ff000000), [argb]"r"(argb)
: "memory", "hi", "lo"
);
ptr[x] = temp1;
}
}
}
}
#endif // WEBP_USE_MIPS_DSP_R2
//------------------------------------------------------------------------------
@ -89,5 +134,6 @@ extern void WebPInitAlphaProcessingMIPSdspR2(void);
void WebPInitAlphaProcessingMIPSdspR2(void) {
#if defined(WEBP_USE_MIPS_DSP_R2)
WebPDispatchAlpha = DispatchAlpha;
WebPMultARGBRow = MultARGBRow;
#endif
}