55414bc573
Note that there are two Godot-specific changes made to libwebp
for the javascript/HTML5 platform. They are documented in the
README.md.
(cherry picked from commit ee3cf211c6)
291 lines
13 KiB
C
291 lines
13 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 <assert.h>
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#include "../utils/rescaler.h"
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//------------------------------------------------------------------------------
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// Row import
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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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const int x_stride1 = x_stride << 2;
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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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for (channel = 0; channel < x_stride; ++channel) {
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const uint8_t* src1 = src + channel;
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rescaler_t* frow = wrk->frow + 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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int loop_c = x_out_max - channel;
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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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"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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"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
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"mult %[temp1], %[temp2] \n\t"
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"maddu %[frac], %[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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"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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[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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assert(accum == 0);
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}
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}
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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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const int x_stride1 = x_stride << 2;
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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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for (channel = 0; channel < x_stride; ++channel) {
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const uint8_t* src1 = src + channel;
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rescaler_t* frow = wrk->frow + 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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assert(wrk->x_sub == 0 /* <- special case for src_width=1 */ || accum == 0);
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}
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}
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//------------------------------------------------------------------------------
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// Row export
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static void ExportRowExpand(WebPRescaler* const wrk) {
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uint8_t* dst = wrk->dst;
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rescaler_t* irow = wrk->irow;
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const int x_out_max = wrk->dst_width * wrk->num_channels;
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const rescaler_t* frow = wrk->frow;
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int temp0, temp1, temp3, temp4, temp5, loop_end;
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const int temp2 = (int)wrk->fy_scale;
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const int temp6 = x_out_max << 2;
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assert(!WebPRescalerOutputDone(wrk));
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assert(wrk->y_accum <= 0);
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assert(wrk->y_expand);
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assert(wrk->y_sub != 0);
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if (wrk->y_accum == 0) {
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__asm__ volatile (
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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], %[temp6] \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[frow]) \n\t"
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"addiu %[dst], %[dst], 1 \n\t"
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"addiu %[frow], %[frow], 4 \n\t"
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"mult %[temp3], %[temp4] \n\t"
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"maddu %[temp0], %[temp2] \n\t"
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"mfhi %[temp5] \n\t"
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"sb %[temp5], -1(%[dst]) \n\t"
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"bne %[frow], %[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), [frow]"+r"(frow),
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[dst]"+r"(dst), [loop_end]"=&r"(loop_end)
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: [temp2]"r"(temp2), [temp6]"r"(temp6)
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: "memory", "hi", "lo"
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);
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} else {
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const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub);
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const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B);
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__asm__ volatile (
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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], %[temp6] \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[frow]) \n\t"
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"lw %[temp1], 0(%[irow]) \n\t"
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"addiu %[dst], %[dst], 1 \n\t"
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"mult %[temp3], %[temp4] \n\t"
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"maddu %[A], %[temp0] \n\t"
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"maddu %[B], %[temp1] \n\t"
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"addiu %[frow], %[frow], 4 \n\t"
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"addiu %[irow], %[irow], 4 \n\t"
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"mfhi %[temp5] \n\t"
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"mult %[temp3], %[temp4] \n\t"
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"maddu %[temp5], %[temp2] \n\t"
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"mfhi %[temp5] \n\t"
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"sb %[temp5], -1(%[dst]) \n\t"
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"bne %[frow], %[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), [frow]"+r"(frow),
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[irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end)
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: [temp2]"r"(temp2), [temp6]"r"(temp6), [A]"r"(A), [B]"r"(B)
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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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const int x_out_max = wrk->dst_width * wrk->num_channels;
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uint8_t* dst = wrk->dst;
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rescaler_t* irow = wrk->irow;
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const rescaler_t* frow = wrk->frow;
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const int yscale = wrk->fy_scale * (-wrk->y_accum);
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int temp0, temp1, temp3, temp4, temp5, loop_end;
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const int temp2 = (int)wrk->fxy_scale;
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const int temp6 = x_out_max << 2;
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assert(!WebPRescalerOutputDone(wrk));
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assert(wrk->y_accum <= 0);
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assert(!wrk->y_expand);
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assert(wrk->fxy_scale != 0);
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if (yscale) {
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__asm__ volatile (
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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], %[temp6] \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[frow]) \n\t"
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"mult %[temp3], %[temp4] \n\t"
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"addiu %[frow], %[frow], 4 \n\t"
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"maddu %[temp0], %[yscale] \n\t"
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"mfhi %[temp1] \n\t"
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"lw %[temp0], 0(%[irow]) \n\t"
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"addiu %[dst], %[dst], 1 \n\t"
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"addiu %[irow], %[irow], 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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"maddu %[temp0], %[temp2] \n\t"
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"mfhi %[temp5] \n\t"
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"sw %[temp1], -4(%[irow]) \n\t"
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"sb %[temp5], -1(%[dst]) \n\t"
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"bne %[frow], %[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), [frow]"+r"(frow),
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[irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end)
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: [temp2]"r"(temp2), [yscale]"r"(yscale), [temp6]"r"(temp6)
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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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"li %[temp3], 0x10000 \n\t"
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"li %[temp4], 0x8000 \n\t"
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"addu %[loop_end], %[irow], %[temp6] \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[irow]) \n\t"
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"addiu %[dst], %[dst], 1 \n\t"
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"addiu %[irow], %[irow], 4 \n\t"
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"mult %[temp3], %[temp4] \n\t"
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"maddu %[temp0], %[temp2] \n\t"
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"mfhi %[temp5] \n\t"
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"sw $zero, -4(%[irow]) \n\t"
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"sb %[temp5], -1(%[dst]) \n\t"
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"bne %[irow], %[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), [irow]"+r"(irow),
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[dst]"+r"(dst), [loop_end]"=&r"(loop_end)
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: [temp2]"r"(temp2), [temp6]"r"(temp6)
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: "memory", "hi", "lo"
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);
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}
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}
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//------------------------------------------------------------------------------
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// Entry point
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extern void WebPRescalerDspInitMIPS32(void);
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WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void) {
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WebPRescalerImportRowExpand = ImportRowExpand;
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WebPRescalerImportRowShrink = ImportRowShrink;
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WebPRescalerExportRowExpand = ExportRowExpand;
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WebPRescalerExportRowShrink = ExportRowShrink;
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}
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#else // !WEBP_USE_MIPS32
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WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPS32)
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#endif // WEBP_USE_MIPS32
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