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https://github.com/webmproject/libwebp.git
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rescaler: simplify ImportRow logic
incorporates the loop over 'channel' and removes one parameter Change-Id: I4e3b33c111ca825fe96461583420413b17326409
This commit is contained in:
Pascal Massimino
@ -18,112 +18,118 @@
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#include <assert.h>
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#include "../utils/rescaler.h"
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static void ImportRowShrink(WebPRescaler* const wrk,
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const uint8_t* const src, int channel) {
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static void ImportRowShrink(WebPRescaler* const wrk, const uint8_t* src) {
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const int x_stride = wrk->num_channels;
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const int x_out_max = wrk->dst_width * wrk->num_channels;
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const int fx_scale = wrk->fx_scale;
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const int x_add = wrk->x_add;
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const int x_sub = wrk->x_sub;
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int* frow = wrk->frow + channel;
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const uint8_t* src1 = src + channel;
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int temp3;
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int base, frac, sum;
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int accum, accum1;
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const int x_stride1 = x_stride << 2;
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int loop_c = x_out_max - channel;
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int channel;
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assert(!wrk->x_expand);
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assert(!WebPRescalerInputDone(wrk));
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__asm__ volatile (
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"li %[sum], 0 \n\t"
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"li %[accum], 0 \n\t"
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"1: \n\t"
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"addu %[accum], %[accum], %[x_add] \n\t"
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"li %[base], 0 \n\t"
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"blez %[accum], 3f \n\t"
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"2: \n\t"
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"lbu %[base], 0(%[src1]) \n\t"
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"subu %[accum], %[accum], %[x_sub] \n\t"
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"addu %[src1], %[src1], %[x_stride] \n\t"
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"addu %[sum], %[sum], %[base] \n\t"
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"bgtz %[accum], 2b \n\t"
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"3: \n\t"
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"negu %[accum1], %[accum] \n\t"
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"mul %[frac], %[base], %[accum1] \n\t"
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"mul %[temp3], %[sum], %[x_sub] \n\t"
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"sll %[accum1], %[frac], 1 \n\t"
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"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
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"mulq_rs.w %[sum], %[accum1], %[fx_scale] \n\t"
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"subu %[temp3], %[temp3], %[frac] \n\t"
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"sw %[temp3], 0(%[frow]) \n\t"
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"addu %[frow], %[frow], %[x_stride1] \n\t"
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"bgtz %[loop_c], 1b \n\t"
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: [accum]"=&r"(accum), [src1]"+&r"(src1), [temp3]"=&r"(temp3),
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[sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac),
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[frow]"+&r"(frow), [accum1]"=&r"(accum1),
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[loop_c]"+&r"(loop_c)
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: [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), [x_sub]"r"(x_sub),
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[x_add] "r" (x_add), [x_stride1] "r" (x_stride1)
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: "memory", "hi", "lo"
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);
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for (channel = 0; channel < x_stride; ++channel) {
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int* frow = wrk->frow + channel;
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const uint8_t* src1 = src + channel;
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int temp3;
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int base, frac, sum;
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int accum, accum1;
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int loop_c = x_out_max;
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__asm__ volatile (
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"li %[sum], 0 \n\t"
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"li %[accum], 0 \n\t"
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"1: \n\t"
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"addu %[accum], %[accum], %[x_add] \n\t"
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"li %[base], 0 \n\t"
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"blez %[accum], 3f \n\t"
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"2: \n\t"
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"lbu %[base], 0(%[src1]) \n\t"
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"subu %[accum], %[accum], %[x_sub] \n\t"
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"addu %[src1], %[src1], %[x_stride] \n\t"
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"addu %[sum], %[sum], %[base] \n\t"
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"bgtz %[accum], 2b \n\t"
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"3: \n\t"
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"negu %[accum1], %[accum] \n\t"
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"mul %[frac], %[base], %[accum1] \n\t"
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"mul %[temp3], %[sum], %[x_sub] \n\t"
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"sll %[accum1], %[frac], 1 \n\t"
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"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
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"mulq_rs.w %[sum], %[accum1], %[fx_scale] \n\t"
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"subu %[temp3], %[temp3], %[frac] \n\t"
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"sw %[temp3], 0(%[frow]) \n\t"
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"addu %[frow], %[frow], %[x_stride1] \n\t"
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"bgtz %[loop_c], 1b \n\t"
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: [accum]"=&r"(accum), [src1]"+&r"(src1), [temp3]"=&r"(temp3),
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[sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac),
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[frow]"+&r"(frow), [accum1]"=&r"(accum1),
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[loop_c]"+&r"(loop_c)
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: [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), [x_sub]"r"(x_sub),
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[x_add] "r" (x_add), [x_stride1] "r" (x_stride1)
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: "memory", "hi", "lo"
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);
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}
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}
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static void ImportRowExpand(WebPRescaler* const wrk,
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const uint8_t* const src, int channel) {
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static void ImportRowExpand(WebPRescaler* const wrk, const uint8_t* src) {
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const int x_stride = wrk->num_channels;
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const int x_out_max = wrk->dst_width * wrk->num_channels;
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const int x_add = wrk->x_add;
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const int x_sub = wrk->x_sub;
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const int src_width = wrk->src_width;
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int* frow = wrk->frow + channel;
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const uint8_t* src1 = src + channel;
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int temp1, temp2, temp3, temp4;
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int frac;
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int accum;
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const int x_stride1 = x_stride << 2;
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int x_out = channel;
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int channel;
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assert(wrk->x_expand);
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assert(!WebPRescalerInputDone(wrk));
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__asm__ volatile (
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"addiu %[temp3], %[src_width], -1 \n\t"
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"lbu %[temp2], 0(%[src1]) \n\t"
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"addu %[src1], %[src1], %[x_stride] \n\t"
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"bgtz %[temp3], 0f \n\t"
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"addiu %[temp1], %[temp2], 0 \n\t"
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"b 3f \n\t"
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"0: \n\t"
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"lbu %[temp1], 0(%[src1]) \n\t"
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"3: \n\t"
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"addiu %[accum], %[x_add], 0 \n\t"
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"1: \n\t"
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"subu %[temp3], %[temp2], %[temp1] \n\t"
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"mul %[temp3], %[temp3], %[accum] \n\t"
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"mul %[temp4], %[temp1], %[x_add] \n\t"
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"addu %[temp3], %[temp4], %[temp3] \n\t"
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"sw %[temp3], 0(%[frow]) \n\t"
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"addu %[frow], %[frow], %[x_stride1] \n\t"
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"addu %[x_out], %[x_out], %[x_stride] \n\t"
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"subu %[temp3], %[x_out], %[x_out_max] \n\t"
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"bgez %[temp3], 2f \n\t"
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"subu %[accum], %[accum], %[x_sub] \n\t"
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"bgez %[accum], 4f \n\t"
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"addiu %[temp2], %[temp1], 0 \n\t"
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"addu %[src1], %[src1], %[x_stride] \n\t"
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"lbu %[temp1], 0(%[src1]) \n\t"
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"addu %[accum], %[accum], %[x_add] \n\t"
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"4: \n\t"
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"b 1b \n\t"
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"2: \n\t"
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: [src1] "+r" (src1), [accum] "=&r" (accum), [temp1] "=&r" (temp1),
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[temp2] "=&r" (temp2), [temp3] "=&r" (temp3), [temp4] "=&r" (temp4),
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[x_out] "+r" (x_out), [frac] "=&r" (frac), [frow] "+r" (frow)
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: [x_stride] "r" (x_stride), [x_add] "r" (x_add), [x_sub] "r" (x_sub),
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[x_stride1] "r" (x_stride1), [src_width] "r" (src_width),
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[x_out_max] "r" (x_out_max)
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: "memory", "hi", "lo"
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);
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for (channel = 0; channel < x_stride; ++channel) {
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int* frow = wrk->frow + channel;
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const uint8_t* src1 = src + channel;
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int temp1, temp2, temp3, temp4;
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int frac;
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int accum;
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int x_out = channel;
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__asm__ volatile (
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"addiu %[temp3], %[src_width], -1 \n\t"
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"lbu %[temp2], 0(%[src1]) \n\t"
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"addu %[src1], %[src1], %[x_stride] \n\t"
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"bgtz %[temp3], 0f \n\t"
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"addiu %[temp1], %[temp2], 0 \n\t"
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"b 3f \n\t"
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"0: \n\t"
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"lbu %[temp1], 0(%[src1]) \n\t"
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"3: \n\t"
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"addiu %[accum], %[x_add], 0 \n\t"
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"1: \n\t"
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"subu %[temp3], %[temp2], %[temp1] \n\t"
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"mul %[temp3], %[temp3], %[accum] \n\t"
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"mul %[temp4], %[temp1], %[x_add] \n\t"
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"addu %[temp3], %[temp4], %[temp3] \n\t"
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"sw %[temp3], 0(%[frow]) \n\t"
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"addu %[frow], %[frow], %[x_stride1] \n\t"
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"addu %[x_out], %[x_out], %[x_stride] \n\t"
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"subu %[temp3], %[x_out], %[x_out_max] \n\t"
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"bgez %[temp3], 2f \n\t"
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"subu %[accum], %[accum], %[x_sub] \n\t"
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"bgez %[accum], 4f \n\t"
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"addiu %[temp2], %[temp1], 0 \n\t"
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"addu %[src1], %[src1], %[x_stride] \n\t"
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"lbu %[temp1], 0(%[src1]) \n\t"
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"addu %[accum], %[accum], %[x_add] \n\t"
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"4: \n\t"
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"b 1b \n\t"
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"2: \n\t"
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: [src1] "+r" (src1), [accum] "=&r" (accum), [temp1] "=&r" (temp1),
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[temp2] "=&r" (temp2), [temp3] "=&r" (temp3), [temp4] "=&r" (temp4),
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[x_out] "+r" (x_out), [frac] "=&r" (frac), [frow] "+r" (frow)
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: [x_stride] "r" (x_stride), [x_add] "r" (x_add), [x_sub] "r" (x_sub),
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[x_stride1] "r" (x_stride1), [src_width] "r" (src_width),
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[x_out_max] "r" (x_out_max)
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: "memory", "hi", "lo"
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);
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}
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}
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static void ExportRowShrink(WebPRescaler* const wrk) {
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