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MIPS: MIPS32r1: Added optimization for QuantizeBlock

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Change-Id: I6047ab107e4d474e35b5af1dac391d5b3d8c049b
This commit is contained in:
Jovan Zelincevic 2014-02-19 16:27:41 +01:00
parent e88150c9b6
commit 2298d5f301
1 changed files with 97 additions and 1 deletions
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98
src/dsp/enc_mips32.c
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@ -9,12 +9,15 @@
//
// MIPS version of speed-critical encoding functions.
//
// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
// Jovan Zelincevic (jovan.zelincevic@imgtec.com)
#include "./dsp.h"
#if defined(WEBP_USE_MIPS32)
#include "../enc/vp8enci.h"
static const int kC1 = 20091 + (1 << 16);
static const int kC2 = 35468;
@ -150,6 +153,98 @@ static void ITransformMIPS32(const uint8_t* ref, const int16_t* in,
#undef VERTICAL_PASS
#undef HORIZONTAL_PASS
// macro for one pass through for loop in QuantizeBlock
// QUANTDIV macro inlined
// J - offset in bytes (kZigzag[n] * 2)
// K - offset in bytes (kZigzag[n] * 4)
// N - offset in bytes (n * 2)
#define QUANTIZE_ONE(J, K, N) \
"lh %[temp0], "#J"(%[ppin]) \n\t" \
"lhu %[temp1], "#J"(%[ppsharpen]) \n\t" \
"lw %[temp2], "#K"(%[ppzthresh]) \n\t" \
"sra %[sign], %[temp0], 15 \n\t" \
"xor %[coeff], %[temp0], %[sign] \n\t" \
"subu %[coeff], %[coeff], %[sign] \n\t" \
"addu %[coeff], %[coeff], %[temp1] \n\t" \
"slt %[temp4], %[temp2], %[coeff] \n\t" \
"addiu %[temp5], $zero, 0 \n\t" \
"addiu %[level], $zero, 0 \n\t" \
"beqz %[temp4], 2f \n\t" \
"lhu %[temp1], "#J"(%[ppiq]) \n\t" \
"lw %[temp2], "#K"(%[ppbias]) \n\t" \
"lhu %[temp3], "#J"(%[ppq]) \n\t" \
"mul %[level], %[coeff], %[temp1] \n\t" \
"addu %[level], %[level], %[temp2] \n\t" \
"sra %[level], %[level], 17 \n\t" \
"slt %[temp4], %[max_level], %[level] \n\t" \
"movn %[level], %[max_level], %[temp4] \n\t" \
"xor %[level], %[level], %[sign] \n\t" \
"subu %[level], %[level], %[sign] \n\t" \
"mul %[temp5], %[level], %[temp3] \n\t" \
"2: \n\t" \
"sh %[temp5], "#J"(%[ppin]) \n\t" \
"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;
int temp0, temp1, temp2, temp3, temp4, temp5;
int sign, coeff, level, i;
int max_level = MAX_LEVEL;
int16_t* ppin = &in[0];
int16_t* pout = &out[0];
const uint16_t* ppsharpen = &mtx->sharpen_[0];
const uint32_t* ppzthresh = &mtx->zthresh_[0];
const uint16_t* ppq = &mtx->q_[0];
const uint16_t* ppiq = &mtx->iq_[0];
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)
QUANTIZE_ONE(10, 20, 8)
QUANTIZE_ONE( 4, 8, 10)
QUANTIZE_ONE( 6, 12, 12)
QUANTIZE_ONE(12, 24, 14)
QUANTIZE_ONE(18, 36, 16)
QUANTIZE_ONE(24, 48, 18)
QUANTIZE_ONE(26, 52, 20)
QUANTIZE_ONE(20, 40, 22)
QUANTIZE_ONE(14, 28, 24)
QUANTIZE_ONE(22, 44, 26)
QUANTIZE_ONE(28, 56, 28)
QUANTIZE_ONE(30, 60, 30)
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
[temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
[sign]"=&r"(sign), [coeff]"=&r"(coeff),
[level]"=&r"(level)
: [n]"r"(n), [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)
: "memory", "hi", "lo"
);
// moved out from macro to increase possibility for earlier breaking
last = -1;
for (i = 15; i >= n; i--) {
if (out[i]) {
last = i;
break;
}
}
return (last >= 0);
}
#undef QUANTIZE_ONE
#endif // WEBP_USE_MIPS32
//------------------------------------------------------------------------------
@ -160,5 +255,6 @@ extern void VP8EncDspInitMIPS32(void);
void VP8EncDspInitMIPS32(void) {
#if defined(WEBP_USE_MIPS32)
VP8ITransform = ITransformMIPS32;
VP8EncQuantizeBlock = QuantizeBlockMIPS32;
#endif // WEBP_USE_MIPS32
}