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~30% encoding speedup: use NEON for QuantizeBlock()

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also revamped the signature to avoid having to pass the 'first' parameter

Change-Id: Ief9af1747dcfb5db0700b595d0073cebd57542a5
This commit is contained in:
skal
2014-04-07 18:02:25 +02:00
committed by Gerrit Code Review
parent f758af6b73
commit 869eaf6c60
6 changed files with 87 additions and 24 deletions
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17
src/dsp/enc_mips32.c
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@ -186,8 +186,7 @@ static void ITransformMIPS32(const uint8_t* ref, const int16_t* in,
"sh %[level], "#N"(%[pout]) \n\t"
static int QuantizeBlockMIPS32(int16_t in[16], int16_t out[16],
int n, const VP8Matrix* const mtx) {
int last;
const VP8Matrix* const mtx) {
int temp0, temp1, temp2, temp3, temp4, temp5;
int sign, coeff, level, i;
int max_level = MAX_LEVEL;
@ -201,9 +200,7 @@ static int QuantizeBlockMIPS32(int16_t in[16], int16_t out[16],
const uint32_t* ppbias = &mtx->bias_[0];
__asm__ volatile(
"bnez %[n], 1f \n\t"
QUANTIZE_ONE( 0, 0, 0)
"1: \n\t"
QUANTIZE_ONE( 2, 4, 2)
QUANTIZE_ONE( 8, 16, 4)
QUANTIZE_ONE(16, 32, 6)
@ -225,7 +222,7 @@ static int QuantizeBlockMIPS32(int16_t in[16], int16_t out[16],
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
[sign]"=&r"(sign), [coeff]"=&r"(coeff),
[level]"=&r"(level)
: [n]"r"(n), [pout]"r"(pout), [ppin]"r"(ppin),
: [pout]"r"(pout), [ppin]"r"(ppin),
[ppiq]"r"(ppiq), [max_level]"r"(max_level),
[ppbias]"r"(ppbias), [ppzthresh]"r"(ppzthresh),
[ppsharpen]"r"(ppsharpen), [ppq]"r"(ppq)
@ -233,14 +230,10 @@ static int QuantizeBlockMIPS32(int16_t in[16], int16_t out[16],
);
// moved out from macro to increase possibility for earlier breaking
last = -1;
for (i = 15; i >= n; i--) {
if (out[i]) {
last = i;
break;
}
for (i = 15; i >= 0; i--) {
if (out[i]) return 1;
}
return (last >= 0);
return 0;
}
#undef QUANTIZE_ONE