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MIPS: mips32: Added optimization for function SetResidualCoeffs

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Change-Id: If67c10285df71ba7dd1aff6c24c2145c280dd2bf
This commit is contained in:
Djordje Pesut 2015-02-09 10:56:23 +01:00
parent a987faedfa
commit 309b790867
1 changed files with 42 additions and 0 deletions
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42
src/dsp/cost_mips32.c
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@ -125,6 +125,47 @@ static int GetResidualCost(int ctx0, const VP8Residual* const res) {
return cost;
}
static void SetResidualCoeffs(const int16_t* const coeffs,
VP8Residual* const res) {
const int16_t* p_coeffs = (int16_t*)coeffs;
int temp0, temp1, temp2, n, n1;
assert(res->first == 0 || coeffs[0] == 0);
__asm__ volatile (
".set push \n\t"
".set noreorder \n\t"
"addiu %[p_coeffs], %[p_coeffs], 28 \n\t"
"li %[n], 15 \n\t"
"li %[temp2], -1 \n\t"
"0: \n\t"
"ulw %[temp0], 0(%[p_coeffs]) \n\t"
"beqz %[temp0], 1f \n\t"
#if defined(WORDS_BIGENDIAN)
" sll %[temp1], %[temp0], 16 \n\t"
#else
" srl %[temp1], %[temp0], 16 \n\t"
#endif
"addiu %[n1], %[n], -1 \n\t"
"movz %[temp0], %[n1], %[temp1] \n\t"
"movn %[temp0], %[n], %[temp1] \n\t"
"j 2f \n\t"
" addiu %[temp2], %[temp0], 0 \n\t"
"1: \n\t"
"addiu %[n], %[n], -2 \n\t"
"bgtz %[n], 0b \n\t"
" addiu %[p_coeffs], %[p_coeffs], -4 \n\t"
"2: \n\t"
".set pop \n\t"
: [p_coeffs]"+&r"(p_coeffs), [temp0]"=&r"(temp0),
[temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
[n]"=&r"(n), [n1]"=&r"(n1)
:
: "memory"
);
res->last = temp2;
res->coeffs = coeffs;
}
#endif // WEBP_USE_MIPS32
//------------------------------------------------------------------------------
@ -135,6 +176,7 @@ extern WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInitMIPS32(void);
void VP8EncDspCostInitMIPS32(void) {
#if defined(WEBP_USE_MIPS32)
VP8GetResidualCost = GetResidualCost;
VP8SetResidualCoeffs = SetResidualCoeffs;
#endif // WEBP_USE_MIPS32
}