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MIPS: dspr2: added optimization for function ClampedAddSubtractHalf

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Change-Id: Iec22e897a4f56e79c18ec00f8caa9cefac67f186
This commit is contained in:
Djordje Pesut
2014-10-10 10:35:43 +02:00
parent 829a8c19a0
commit 18d5a1efa8
3 changed files with 44 additions and 29 deletions
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35
src/dsp/lossless_mips_dsp_r2.c
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@ -90,6 +90,40 @@ MAP_COLOR_FUNCS(MapAlpha, uint8_t, VP8GetAlphaIndex, VP8GetAlphaValue)
#undef MAP_COLOR_FUNCS
static WEBP_INLINE uint32_t ClampedAddSubtractHalf(uint32_t c0, uint32_t c1,
uint32_t c2) {
int tmp1, tmp2, tmp3, tmp4, tmp5, tmp6;
__asm__ volatile (
"adduh.qb %[tmp5], %[c0], %[c1] \n\t"
"preceu.ph.qbr %[tmp3], %[c2] \n\t"
"preceu.ph.qbr %[tmp1], %[tmp5] \n\t"
"preceu.ph.qbl %[tmp2], %[tmp5] \n\t"
"preceu.ph.qbl %[tmp4], %[c2] \n\t"
"subq.ph %[tmp3], %[tmp1], %[tmp3] \n\t"
"subq.ph %[tmp4], %[tmp2], %[tmp4] \n\t"
"shrl.ph %[tmp5], %[tmp3], 15 \n\t"
"shrl.ph %[tmp6], %[tmp4], 15 \n\t"
"addq.ph %[tmp3], %[tmp3], %[tmp5] \n\t"
"addq.ph %[tmp4], %[tmp6], %[tmp4] \n\t"
"shra.ph %[tmp3], %[tmp3], 1 \n\t"
"shra.ph %[tmp4], %[tmp4], 1 \n\t"
"addq.ph %[tmp1], %[tmp1], %[tmp3] \n\t"
"addq.ph %[tmp2], %[tmp2], %[tmp4] \n\t"
"shll_s.ph %[tmp1], %[tmp1], 7 \n\t"
"shll_s.ph %[tmp2], %[tmp2], 7 \n\t"
"precrqu_s.qb.ph %[tmp1], %[tmp2], %[tmp1] \n\t"
: [tmp1]"=&r"(tmp1), [tmp2]"=&r"(tmp2), [tmp3]"=&r"(tmp3),
[tmp4]"=&r"(tmp4), [tmp5]"=&r"(tmp5), [tmp6]"=r"(tmp6)
: [c0]"r"(c0), [c1]"r"(c1), [c2]"r"(c2)
: "memory"
);
return tmp1;
}
static uint32_t Predictor13(uint32_t left, const uint32_t* const top) {
return ClampedAddSubtractHalf(left, top[0], top[-1]);
}
#endif // WEBP_USE_MIPS_DSP_R2
//------------------------------------------------------------------------------
@ -100,6 +134,7 @@ void VP8LDspInitMIPSdspR2(void) {
#if defined(WEBP_USE_MIPS_DSP_R2)
VP8LMapColor32b = MapARGB;
VP8LMapColor8b = MapAlpha;
VP8LPredictors[13] = Predictor13;
#endif // WEBP_USE_MIPS_DSP_R2
}