mirror of
https://github.com/webmproject/libwebp.git
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d581ba40ba
by removing redundant RFIX macros and using a plain-C fallback. Change-Id: I52436c672bf20780b6fe3bcf43fe73e1abac10ff
193 lines
8.7 KiB
C
193 lines
8.7 KiB
C
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// MIPS version of rescaling functions
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//
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// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
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#include "./dsp.h"
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#if defined(WEBP_USE_MIPS32)
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#include "../utils/rescaler.h"
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static void ImportRow(WebPRescaler* const wrk,
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const uint8_t* const src, int channel) {
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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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int* irow = wrk->irow + channel;
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const uint8_t* src1 = src + channel;
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int temp1, temp2, 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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if (!wrk->x_expand) {
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__asm__ volatile (
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"li %[temp1], 0x8000 \n\t"
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"li %[temp2], 0x10000 \n\t"
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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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"blez %[accum], 3f \n\t"
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"2: \n\t"
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"lbu %[temp3], 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], %[temp3] \n\t"
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"bgtz %[accum], 2b \n\t"
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"3: \n\t"
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"lbu %[base], 0(%[src1]) \n\t"
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"addu %[src1], %[src1], %[x_stride] \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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"addu %[temp3], %[sum], %[base] \n\t"
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"mul %[temp3], %[temp3], %[x_sub] \n\t"
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"lw %[base], 0(%[irow]) \n\t"
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"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
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"sll %[accum1], %[frac], 2 \n\t"
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"mult %[temp1], %[temp2] \n\t"
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"madd %[accum1], %[fx_scale] \n\t"
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"mfhi %[sum] \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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"add %[base], %[base], %[temp3] \n\t"
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"sw %[base], 0(%[irow]) \n\t"
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"addu %[irow], %[irow], %[x_stride1] \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), [irow] "+r" (irow), [accum1] "=&r" (accum1),
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[temp2] "=&r" (temp2), [temp1] "=&r" (temp1)
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: [x_stride] "r" (x_stride), [fx_scale] "r" (fx_scale),
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[x_sub] "r" (x_sub), [x_add] "r" (x_add),
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[loop_c] "r" (loop_c), [x_stride1] "r" (x_stride1)
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: "memory", "hi", "lo"
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);
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} else {
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__asm__ volatile (
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"lbu %[temp1], 0(%[src1]) \n\t"
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"move %[temp2], %[temp1] \n\t"
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"li %[accum], 0 \n\t"
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"1: \n\t"
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"bgez %[accum], 2f \n\t"
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"move %[temp2], %[temp1] \n\t"
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"addu %[src1], %[x_stride] \n\t"
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"lbu %[temp1], 0(%[src1]) \n\t"
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"addu %[accum], %[x_add] \n\t"
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"2: \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 %[base], %[temp1], %[x_add] \n\t"
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"subu %[accum], %[accum], %[x_sub] \n\t"
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"lw %[frac], 0(%[irow]) \n\t"
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"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
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"addu %[temp3], %[base], %[temp3] \n\t"
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"sw %[temp3], 0(%[frow]) \n\t"
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"addu %[frow], %[x_stride1] \n\t"
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"addu %[frac], %[temp3] \n\t"
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"sw %[frac], 0(%[irow]) \n\t"
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"addu %[irow], %[x_stride1] \n\t"
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"bgtz %[loop_c], 1b \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), [base] "=&r" (base),
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[frac] "=&r" (frac), [frow] "+r" (frow), [irow] "+r" (irow)
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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), [loop_c] "r" (loop_c)
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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 ExportRow(WebPRescaler* const wrk, int x_out) {
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if (wrk->y_accum <= 0) {
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uint8_t* const dst = wrk->dst;
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int32_t* const irow = wrk->irow;
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const int32_t* const frow = wrk->frow;
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const int yscale = wrk->fy_scale * (-wrk->y_accum);
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const int x_out_max = wrk->dst_width * wrk->num_channels;
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// if wrk->fxy_scale can fit into 32 bits use optimized code,
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// otherwise use C code
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if ((wrk->fxy_scale >> 32) == 0) {
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int temp0, temp1, temp3, temp4, temp5, temp6, temp7, loop_end;
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const int temp2 = (int)(wrk->fxy_scale);
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const int temp8 = x_out_max << 2;
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uint8_t* dst_t = (uint8_t*)dst;
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int32_t* irow_t = (int32_t*)irow;
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const int32_t* frow_t = (const int32_t*)frow;
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__asm__ volatile(
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"addiu %[temp6], $zero, -256 \n\t"
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"addiu %[temp7], $zero, 255 \n\t"
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"li %[temp3], 0x10000 \n\t"
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"li %[temp4], 0x8000 \n\t"
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"addu %[loop_end], %[frow_t], %[temp8] \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[frow_t]) \n\t"
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"mult %[temp3], %[temp4] \n\t"
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"addiu %[frow_t], %[frow_t], 4 \n\t"
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"sll %[temp0], %[temp0], 2 \n\t"
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"madd %[temp0], %[yscale] \n\t"
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"mfhi %[temp1] \n\t"
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"lw %[temp0], 0(%[irow_t]) \n\t"
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"addiu %[dst_t], %[dst_t], 1 \n\t"
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"addiu %[irow_t], %[irow_t], 4 \n\t"
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"subu %[temp0], %[temp0], %[temp1] \n\t"
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"mult %[temp3], %[temp4] \n\t"
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"sll %[temp0], %[temp0], 2 \n\t"
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"madd %[temp0], %[temp2] \n\t"
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"mfhi %[temp5] \n\t"
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"sw %[temp1], -4(%[irow_t]) \n\t"
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"and %[temp0], %[temp5], %[temp6] \n\t"
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"slti %[temp1], %[temp5], 0 \n\t"
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"beqz %[temp0], 2f \n\t"
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"xor %[temp5], %[temp5], %[temp5] \n\t"
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"movz %[temp5], %[temp7], %[temp1] \n\t"
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"2: \n\t"
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"sb %[temp5], -1(%[dst_t]) \n\t"
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"bne %[frow_t], %[loop_end], 1b \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
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[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6),
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[temp7]"=&r"(temp7), [frow_t]"+r"(frow_t), [irow_t]"+r"(irow_t),
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[dst_t]"+r"(dst_t), [loop_end]"=&r"(loop_end)
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: [temp2]"r"(temp2), [yscale]"r"(yscale), [temp8]"r"(temp8)
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: "memory", "hi", "lo"
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);
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wrk->y_accum += wrk->y_add;
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wrk->dst += wrk->dst_stride;
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} else {
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WebPRescalerExportRowC(wrk, x_out);
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}
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}
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}
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#endif // WEBP_USE_MIPS32
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//------------------------------------------------------------------------------
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// Entry point
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extern WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void);
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WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void) {
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#if defined(WEBP_USE_MIPS32)
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WebPRescalerImportRow = ImportRow;
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WebPRescalerExportRow = ExportRow;
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#endif // WEBP_USE_MIPS32
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}
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