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MIPS: dspr2: added optimization for function ImportRow

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Change-Id: I8205b551755ee51f5efd0c54d64c8b09771786b1
This commit is contained in:
Djordje Pesut 2014-12-17 15:24:41 +01:00
parent e66a9225f3
commit bdf7b40c5c
1 changed files with 94 additions and 0 deletions
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94
src/utils/rescaler.c
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@ -255,6 +255,99 @@ static void ExportRowMIPS(WebPRescaler* const wrk, int x_out) {
#if defined(WEBP_USE_MIPS_DSP_R2)
static void ImportRowMIPS_dsp_r2(WebPRescaler* const wrk,
const uint8_t* const src, int channel) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
const int fx_scale = wrk->fx_scale;
const int x_add = wrk->x_add;
const int x_sub = wrk->x_sub;
int* frow = wrk->frow + channel;
int* irow = wrk->irow + channel;
const uint8_t* src1 = src + channel;
int temp1, temp2, temp3;
int base, frac, sum;
int accum, accum1;
const int x_stride1 = x_stride << 2;
int loop_c = x_out_max - channel;
if (!wrk->x_expand) {
__asm__ volatile (
"li %[sum], 0 \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"addu %[accum], %[accum], %[x_add] \n\t"
"blez %[accum], 3f \n\t"
"2: \n\t"
"lbu %[temp3], 0(%[src1]) \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"addu %[sum], %[sum], %[temp3] \n\t"
"bgtz %[accum], 2b \n\t"
"3: \n\t"
"lbu %[base], 0(%[src1]) \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"negu %[accum1], %[accum] \n\t"
"mul %[frac], %[base], %[accum1] \n\t"
"addu %[temp3], %[sum], %[base] \n\t"
"mul %[temp3], %[temp3], %[x_sub] \n\t"
"lw %[base], 0(%[irow]) \n\t"
"sll %[accum1], %[frac], 1 \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"mulq_rs.w %[sum], %[accum1], %[fx_scale] \n\t"
"subu %[temp3], %[temp3], %[frac] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"add %[base], %[base], %[temp3] \n\t"
"sw %[base], 0(%[irow]) \n\t"
"addu %[irow], %[irow], %[x_stride1] \n\t"
"addu %[frow], %[frow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [accum]"=&r"(accum), [src1]"+&r"(src1), [temp3]"=&r"(temp3),
[sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac),
[frow]"+&r"(frow), [irow]"+&r"(irow), [accum1]"=&r"(accum1),
[loop_c]"+&r"(loop_c)
: [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), [x_sub]"r"(x_sub),
[x_add] "r" (x_add), [x_stride1] "r" (x_stride1)
: "memory", "hi", "lo"
);
} else {
__asm__ volatile (
"lbu %[temp1], 0(%[src1]) \n\t"
"move %[temp2], %[temp1] \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"bgez %[accum], 2f \n\t"
"move %[temp2], %[temp1] \n\t"
"addu %[src1], %[x_stride] \n\t"
"lbu %[temp1], 0(%[src1]) \n\t"
"addu %[accum], %[x_add] \n\t"
"2: \n\t"
"subu %[temp3], %[temp2], %[temp1] \n\t"
"mul %[temp3], %[temp3], %[accum] \n\t"
"mul %[base], %[temp1], %[x_add] \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"lw %[frac], 0(%[irow]) \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"addu %[temp3], %[base], %[temp3] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"addu %[frow], %[x_stride1] \n\t"
"addu %[frac], %[temp3] \n\t"
"sw %[frac], 0(%[irow]) \n\t"
"addu %[irow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [src1]"+&r"(src1), [accum]"=&r"(accum), [temp1]"=&r"(temp1),
[temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [base]"=&r"(base),
[frac]"=&r"(frac), [frow]"+&r"(frow), [irow]"+&r"(irow),
[loop_c]"+&r"(loop_c)
: [x_stride]"r"(x_stride), [x_add]"r"(x_add), [x_sub]"r"(x_sub),
[x_stride1]"r"(x_stride1)
: "memory", "hi", "lo"
);
}
}
static void ExportRowMIPS_dsp_r2(WebPRescaler* const wrk, int x_out) {
if (wrk->y_accum <= 0) {
uint8_t* dst = wrk->dst;
@ -381,6 +474,7 @@ void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height,
#endif
#if defined(WEBP_USE_MIPS_DSP_R2)
if (VP8GetCPUInfo(kMIPSdspR2)) {
WebPRescalerImportRow = ImportRowMIPS_dsp_r2;
WebPRescalerExportRow = ExportRowMIPS_dsp_r2;
}
#endif