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MIPS: MIPS32r1: Added optimization for HistogramAdd.

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Change-Id: I39622a9c340c4090f64dd10e515c4ef2aa21d10a
This commit is contained in:
Djordje Pesut
2014-04-29 13:53:35 +02:00
committed by skal
parent e0609ade15
commit 38e2db3e16
1 changed files with 126 additions and 0 deletions
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126
src/dsp/lossless_mips32.c
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@@ -271,6 +271,131 @@ static VP8LStreaks HuffmanCostCombinedCount(const uint32_t* X,
return stats;
}
#define ASM_START \
__asm__ volatile( \
".set push \n\t" \
".set at \n\t" \
".set macro \n\t" \
"1: \n\t"
// P2 = P0 + P1
// A..D - offsets
// E - temp variable to tell macro
// if pointer should be incremented
// literal_ and successive histograms could be unaligned
// so we must use ulw and usw
#define ADD_TO_OUT(A, B, C, D, E, P0, P1, P2) \
"ulw %[temp0], "#A"(%["#P0"]) \n\t" \
"ulw %[temp1], "#B"(%["#P0"]) \n\t" \
"ulw %[temp2], "#C"(%["#P0"]) \n\t" \
"ulw %[temp3], "#D"(%["#P0"]) \n\t" \
"ulw %[temp4], "#A"(%["#P1"]) \n\t" \
"ulw %[temp5], "#B"(%["#P1"]) \n\t" \
"ulw %[temp6], "#C"(%["#P1"]) \n\t" \
"ulw %[temp7], "#D"(%["#P1"]) \n\t" \
"addu %[temp4], %[temp4], %[temp0] \n\t" \
"addu %[temp5], %[temp5], %[temp1] \n\t" \
"addu %[temp6], %[temp6], %[temp2] \n\t" \
"addu %[temp7], %[temp7], %[temp3] \n\t" \
"addiu %["#P0"], %["#P0"], 16 \n\t" \
".if "#E" == 1 \n\t" \
"addiu %["#P1"], %["#P1"], 16 \n\t" \
".endif \n\t" \
"usw %[temp4], "#A"(%["#P2"]) \n\t" \
"usw %[temp5], "#B"(%["#P2"]) \n\t" \
"usw %[temp6], "#C"(%["#P2"]) \n\t" \
"usw %[temp7], "#D"(%["#P2"]) \n\t" \
"addiu %["#P2"], %["#P2"], 16 \n\t" \
"bne %["#P0"], %[LoopEnd], 1b \n\t" \
".set pop \n\t" \
#define ASM_END_COMMON_0 \
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), \
[temp2]"=&r"(temp2), [temp3]"=&r"(temp3), \
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), \
[temp6]"=&r"(temp6), [temp7]"=&r"(temp7), \
[pa]"+r"(pa), [pout]"+r"(pout)
#define ASM_END_COMMON_1 \
: [LoopEnd]"r"(LoopEnd) \
: "memory", "at" \
);
#define ASM_END_0 \
ASM_END_COMMON_0 \
, [pb]"+r"(pb) \
ASM_END_COMMON_1
#define ASM_END_1 \
ASM_END_COMMON_0 \
ASM_END_COMMON_1
#define ADD_VECTOR(A, B, OUT, SIZE, EXTRA_SIZE) do { \
const uint32_t* pa = (const uint32_t*)(A); \
const uint32_t* pb = (const uint32_t*)(B); \
uint32_t* pout = (uint32_t*)(OUT); \
const uint32_t* const LoopEnd = pa + (SIZE); \
assert((SIZE) % 4 == 0); \
ASM_START \
ADD_TO_OUT(0, 4, 8, 12, 1, pa, pb, pout) \
ASM_END_0 \
if ((EXTRA_SIZE) > 0) { \
const int last = (EXTRA_SIZE); \
int i; \
for (i = 0; i < last; ++i) pout[i] = pa[i] + pb[i]; \
} \
} while (0)
#define ADD_VECTOR_EQ(A, OUT, SIZE, EXTRA_SIZE) do { \
const uint32_t* pa = (const uint32_t*)(A); \
uint32_t* pout = (uint32_t*)(OUT); \
const uint32_t* const LoopEnd = pa + (SIZE); \
assert((SIZE) % 4 == 0); \
ASM_START \
ADD_TO_OUT(0, 4, 8, 12, 0, pa, pout, pout) \
ASM_END_1 \
if ((EXTRA_SIZE) > 0) { \
const int last = (EXTRA_SIZE); \
int i; \
for (i = 0; i < last; ++i) pout[i] += pa[i]; \
} \
} while (0)
static void HistogramAdd(const VP8LHistogram* const a,
const VP8LHistogram* const b,
VP8LHistogram* const out) {
uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
const int extra_cache_size = VP8LHistogramNumCodes(a->palette_code_bits_)
- (NUM_LITERAL_CODES + NUM_LENGTH_CODES);
assert(a->palette_code_bits_ == b->palette_code_bits_);
if (b != out) {
ADD_VECTOR(a->literal_, b->literal_, out->literal_,
NUM_LITERAL_CODES + NUM_LENGTH_CODES, extra_cache_size);
ADD_VECTOR(a->distance_, b->distance_, out->distance_,
NUM_DISTANCE_CODES, 0);
ADD_VECTOR(a->red_, b->red_, out->red_, NUM_LITERAL_CODES, 0);
ADD_VECTOR(a->blue_, b->blue_, out->blue_, NUM_LITERAL_CODES, 0);
ADD_VECTOR(a->alpha_, b->alpha_, out->alpha_, NUM_LITERAL_CODES, 0);
} else {
ADD_VECTOR_EQ(a->literal_, out->literal_,
NUM_LITERAL_CODES + NUM_LENGTH_CODES, extra_cache_size);
ADD_VECTOR_EQ(a->distance_, out->distance_, NUM_DISTANCE_CODES, 0);
ADD_VECTOR_EQ(a->red_, out->red_, NUM_LITERAL_CODES, 0);
ADD_VECTOR_EQ(a->blue_, out->blue_, NUM_LITERAL_CODES, 0);
ADD_VECTOR_EQ(a->alpha_, out->alpha_, NUM_LITERAL_CODES, 0);
}
}
#undef ADD_VECTOR_EQ
#undef ADD_VECTOR
#undef ASM_END_1
#undef ASM_END_0
#undef ASM_END_COMMON_1
#undef ASM_END_COMMON_0
#undef ADD_TO_OUT
#undef ASM_START
#endif // WEBP_USE_MIPS32
//------------------------------------------------------------------------------
@@ -286,5 +411,6 @@ void VP8LDspInitMIPS32(void) {
VP8LExtraCostCombined = ExtraCostCombined;
VP8LHuffmanCostCount = HuffmanCostCount;
VP8LHuffmanCostCombinedCount = HuffmanCostCombinedCount;
VP8LHistogramAdd = HistogramAdd;
#endif // WEBP_USE_MIPS32
}