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MIPS: dspr2: Added optimization for function CollectHistogram

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Change-Id: Id6b87ea1c9d21fee9494ad6c53ffc84ef60d5974
This commit is contained in:
Djordje Pesut 2015-02-03 08:38:08 +01:00
parent 2c906c407c
commit 6ce296da12
1 changed files with 100 additions and 0 deletions
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100
src/dsp/enc_mips_dsp_r2.c
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@ -1381,6 +1381,105 @@ static void FTransformWHT(const int16_t* in, int16_t* out) {
#undef VERTICAL_PASS_WHT
#undef HORIZONTAL_PASS_WHT
// macro for converting coefficients to bin
// convert 8 coeffs at time
// A, B, C, D - offsets in bytes to load from out buffer
#define CONVERT_COEFFS_TO_BIN(A, B, C, D) \
"ulw %[temp0], "#A"(%[out]) \n\t" \
"ulw %[temp1], "#B"(%[out]) \n\t" \
"ulw %[temp2], "#C"(%[out]) \n\t" \
"ulw %[temp3], "#D"(%[out]) \n\t" \
"absq_s.ph %[temp0], %[temp0] \n\t" \
"absq_s.ph %[temp1], %[temp1] \n\t" \
"absq_s.ph %[temp2], %[temp2] \n\t" \
"absq_s.ph %[temp3], %[temp3] \n\t" \
/* TODO(skal): add rounding ? shra_r.ph : shra.ph */ \
/* for following 4 instructions */ \
"shra.ph %[temp0], %[temp0], 3 \n\t" \
"shra.ph %[temp1], %[temp1], 3 \n\t" \
"shra.ph %[temp2], %[temp2], 3 \n\t" \
"shra.ph %[temp3], %[temp3], 3 \n\t" \
"shll_s.ph %[temp0], %[temp0], 10 \n\t" \
"shll_s.ph %[temp1], %[temp1], 10 \n\t" \
"shll_s.ph %[temp2], %[temp2], 10 \n\t" \
"shll_s.ph %[temp3], %[temp3], 10 \n\t" \
"shrl.ph %[temp0], %[temp0], 10 \n\t" \
"shrl.ph %[temp1], %[temp1], 10 \n\t" \
"shrl.ph %[temp2], %[temp2], 10 \n\t" \
"shrl.ph %[temp3], %[temp3], 10 \n\t" \
"shll.ph %[temp0], %[temp0], 2 \n\t" \
"shll.ph %[temp1], %[temp1], 2 \n\t" \
"shll.ph %[temp2], %[temp2], 2 \n\t" \
"shll.ph %[temp3], %[temp3], 2 \n\t" \
"ext %[temp4], %[temp0], 0, 16 \n\t" \
"ext %[temp0], %[temp0], 16, 16 \n\t" \
"addu %[temp4], %[temp4], %[dist] \n\t" \
"addu %[temp0], %[temp0], %[dist] \n\t" \
"ext %[temp5], %[temp1], 0, 16 \n\t" \
"lw %[temp8], 0(%[temp4]) \n\t" \
"ext %[temp1], %[temp1], 16, 16 \n\t" \
"addu %[temp5], %[temp5], %[dist] \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp4]) \n\t" \
"lw %[temp8], 0(%[temp0]) \n\t" \
"addu %[temp1], %[temp1], %[dist] \n\t" \
"ext %[temp6], %[temp2], 0, 16 \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp0]) \n\t" \
"lw %[temp8], 0(%[temp5]) \n\t" \
"ext %[temp2], %[temp2], 16, 16 \n\t" \
"addu %[temp6], %[temp6], %[dist] \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp5]) \n\t" \
"lw %[temp8], 0(%[temp1]) \n\t" \
"addu %[temp2], %[temp2], %[dist] \n\t" \
"ext %[temp7], %[temp3], 0, 16 \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp1]) \n\t" \
"lw %[temp8], 0(%[temp6]) \n\t" \
"ext %[temp3], %[temp3], 16, 16 \n\t" \
"addu %[temp7], %[temp7], %[dist] \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp6]) \n\t" \
"lw %[temp8], 0(%[temp2]) \n\t" \
"addu %[temp3], %[temp3], %[dist] \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp2]) \n\t" \
"lw %[temp8], 0(%[temp7]) \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp7]) \n\t" \
"lw %[temp8], 0(%[temp3]) \n\t" \
"addiu %[temp8], %[temp8], 1 \n\t" \
"sw %[temp8], 0(%[temp3]) \n\t"
static void CollectHistogram(const uint8_t* ref, const uint8_t* pred,
int start_block, int end_block,
VP8Histogram* const histo) {
int j;
int distribution[MAX_COEFF_THRESH + 1] = { 0 };
const int max_coeff = (MAX_COEFF_THRESH << 16) + MAX_COEFF_THRESH;
for (j = start_block; j < end_block; ++j) {
int16_t out[16];
int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8;
VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out);
// Convert coefficients to bin.
__asm__ volatile (
CONVERT_COEFFS_TO_BIN( 0, 4, 8, 12)
CONVERT_COEFFS_TO_BIN(16, 20, 24, 28)
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
[temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
[temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8)
: [dist]"r"(distribution), [out]"r"(out), [max_coeff]"r"(max_coeff)
: "memory"
);
}
VP8LSetHistogramData(distribution, histo);
}
#undef CONVERT_COEFFS_TO_BIN
#endif // WEBP_USE_MIPS_DSP_R2
//------------------------------------------------------------------------------
@ -1406,5 +1505,6 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitMIPSdspR2(void) {
VP8EncQuantizeBlock = QuantizeBlock;
VP8EncQuantize2Blocks = Quantize2Blocks;
VP8FTransformWHT = FTransformWHT;
VP8CollectHistogram = CollectHistogram;
#endif // WEBP_USE_MIPS_DSP_R2
}