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)
314 lines
15 KiB
C
314 lines
15 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_MIPS_DSP_R2)
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#include <assert.h>
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#include "../utils/rescaler.h"
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#define ROUNDER (WEBP_RESCALER_ONE >> 1)
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#define MULT_FIX(x, y) (((uint64_t)(x) * (y) + ROUNDER) >> WEBP_RESCALER_RFIX)
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//------------------------------------------------------------------------------
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// Row export
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static void ExportRowShrink(WebPRescaler* const wrk) {
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int i;
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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, temp2, temp3, temp4, temp5, loop_end;
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const int temp7 = (int)wrk->fxy_scale;
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const int temp6 = (x_out_max & ~0x3) << 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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if (x_out_max >= 4) {
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int temp8, temp9, temp10, temp11;
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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], 4(%[frow]) \n\t"
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"lw %[temp2], 8(%[frow]) \n\t"
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"lw %[temp5], 12(%[frow]) \n\t"
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"mult $ac0, %[temp3], %[temp4] \n\t"
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"maddu $ac0, %[temp0], %[yscale] \n\t"
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"mult $ac1, %[temp3], %[temp4] \n\t"
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"maddu $ac1, %[temp1], %[yscale] \n\t"
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"mult $ac2, %[temp3], %[temp4] \n\t"
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"maddu $ac2, %[temp2], %[yscale] \n\t"
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"mult $ac3, %[temp3], %[temp4] \n\t"
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"maddu $ac3, %[temp5], %[yscale] \n\t"
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"addiu %[frow], %[frow], 16 \n\t"
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"mfhi %[temp0], $ac0 \n\t"
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"mfhi %[temp1], $ac1 \n\t"
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"mfhi %[temp2], $ac2 \n\t"
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"mfhi %[temp5], $ac3 \n\t"
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"lw %[temp8], 0(%[irow]) \n\t"
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"lw %[temp9], 4(%[irow]) \n\t"
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"lw %[temp10], 8(%[irow]) \n\t"
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"lw %[temp11], 12(%[irow]) \n\t"
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"addiu %[dst], %[dst], 4 \n\t"
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"addiu %[irow], %[irow], 16 \n\t"
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"subu %[temp8], %[temp8], %[temp0] \n\t"
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"subu %[temp9], %[temp9], %[temp1] \n\t"
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"subu %[temp10], %[temp10], %[temp2] \n\t"
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"subu %[temp11], %[temp11], %[temp5] \n\t"
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"mult $ac0, %[temp3], %[temp4] \n\t"
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"maddu $ac0, %[temp8], %[temp7] \n\t"
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"mult $ac1, %[temp3], %[temp4] \n\t"
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"maddu $ac1, %[temp9], %[temp7] \n\t"
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"mult $ac2, %[temp3], %[temp4] \n\t"
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"maddu $ac2, %[temp10], %[temp7] \n\t"
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"mult $ac3, %[temp3], %[temp4] \n\t"
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"maddu $ac3, %[temp11], %[temp7] \n\t"
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"mfhi %[temp8], $ac0 \n\t"
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"mfhi %[temp9], $ac1 \n\t"
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"mfhi %[temp10], $ac2 \n\t"
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"mfhi %[temp11], $ac3 \n\t"
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"sw %[temp0], -16(%[irow]) \n\t"
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"sw %[temp1], -12(%[irow]) \n\t"
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"sw %[temp2], -8(%[irow]) \n\t"
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"sw %[temp5], -4(%[irow]) \n\t"
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"sb %[temp8], -4(%[dst]) \n\t"
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"sb %[temp9], -3(%[dst]) \n\t"
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"sb %[temp10], -2(%[dst]) \n\t"
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"sb %[temp11], -1(%[dst]) \n\t"
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"bne %[frow], %[loop_end], 1b \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
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[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow),
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[irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end),
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[temp8]"=&r"(temp8), [temp9]"=&r"(temp9), [temp10]"=&r"(temp10),
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[temp11]"=&r"(temp11), [temp2]"=&r"(temp2)
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: [temp7]"r"(temp7), [yscale]"r"(yscale), [temp6]"r"(temp6)
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: "memory", "hi", "lo", "$ac1hi", "$ac1lo",
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"$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo"
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);
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}
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for (i = 0; i < (x_out_max & 0x3); ++i) {
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const uint32_t frac = (uint32_t)MULT_FIX(*frow++, yscale);
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const int v = (int)MULT_FIX(*irow - frac, wrk->fxy_scale);
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assert(v >= 0 && v <= 255);
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*dst++ = v;
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*irow++ = frac; // new fractional start
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}
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} else {
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if (x_out_max >= 4) {
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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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"lw %[temp1], 4(%[irow]) \n\t"
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"lw %[temp2], 8(%[irow]) \n\t"
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"lw %[temp5], 12(%[irow]) \n\t"
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"addiu %[dst], %[dst], 4 \n\t"
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"addiu %[irow], %[irow], 16 \n\t"
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"mult $ac0, %[temp3], %[temp4] \n\t"
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"maddu $ac0, %[temp0], %[temp7] \n\t"
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"mult $ac1, %[temp3], %[temp4] \n\t"
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"maddu $ac1, %[temp1], %[temp7] \n\t"
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"mult $ac2, %[temp3], %[temp4] \n\t"
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"maddu $ac2, %[temp2], %[temp7] \n\t"
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"mult $ac3, %[temp3], %[temp4] \n\t"
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"maddu $ac3, %[temp5], %[temp7] \n\t"
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"mfhi %[temp0], $ac0 \n\t"
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"mfhi %[temp1], $ac1 \n\t"
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"mfhi %[temp2], $ac2 \n\t"
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"mfhi %[temp5], $ac3 \n\t"
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"sw $zero, -16(%[irow]) \n\t"
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"sw $zero, -12(%[irow]) \n\t"
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"sw $zero, -8(%[irow]) \n\t"
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"sw $zero, -4(%[irow]) \n\t"
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"sb %[temp0], -4(%[dst]) \n\t"
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"sb %[temp1], -3(%[dst]) \n\t"
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"sb %[temp2], -2(%[dst]) \n\t"
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"sb %[temp5], -1(%[dst]) \n\t"
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"bne %[irow], %[loop_end], 1b \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
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[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [irow]"+r"(irow),
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[dst]"+r"(dst), [loop_end]"=&r"(loop_end), [temp2]"=&r"(temp2)
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: [temp7]"r"(temp7), [temp6]"r"(temp6)
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: "memory", "hi", "lo", "$ac1hi", "$ac1lo",
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"$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo"
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);
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}
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for (i = 0; i < (x_out_max & 0x3); ++i) {
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const int v = (int)MULT_FIX(*irow, wrk->fxy_scale);
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assert(v >= 0 && v <= 255);
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*dst++ = v;
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*irow++ = 0;
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}
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}
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}
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static void ExportRowExpand(WebPRescaler* const wrk) {
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int i;
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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, temp2, temp3, temp4, temp5, loop_end;
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const int temp6 = (x_out_max & ~0x3) << 2;
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const int temp7 = (int)wrk->fy_scale;
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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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if (x_out_max >= 4) {
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__asm__ volatile (
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"li %[temp4], 0x10000 \n\t"
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"li %[temp5], 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], 4(%[frow]) \n\t"
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"lw %[temp2], 8(%[frow]) \n\t"
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"lw %[temp3], 12(%[frow]) \n\t"
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"addiu %[dst], %[dst], 4 \n\t"
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"addiu %[frow], %[frow], 16 \n\t"
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"mult $ac0, %[temp4], %[temp5] \n\t"
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"maddu $ac0, %[temp0], %[temp7] \n\t"
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"mult $ac1, %[temp4], %[temp5] \n\t"
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"maddu $ac1, %[temp1], %[temp7] \n\t"
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"mult $ac2, %[temp4], %[temp5] \n\t"
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"maddu $ac2, %[temp2], %[temp7] \n\t"
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"mult $ac3, %[temp4], %[temp5] \n\t"
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"maddu $ac3, %[temp3], %[temp7] \n\t"
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"mfhi %[temp0], $ac0 \n\t"
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"mfhi %[temp1], $ac1 \n\t"
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"mfhi %[temp2], $ac2 \n\t"
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"mfhi %[temp3], $ac3 \n\t"
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"sb %[temp0], -4(%[dst]) \n\t"
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"sb %[temp1], -3(%[dst]) \n\t"
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"sb %[temp2], -2(%[dst]) \n\t"
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"sb %[temp3], -1(%[dst]) \n\t"
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"bne %[frow], %[loop_end], 1b \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
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[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow),
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[dst]"+r"(dst), [loop_end]"=&r"(loop_end), [temp2]"=&r"(temp2)
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: [temp7]"r"(temp7), [temp6]"r"(temp6)
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: "memory", "hi", "lo", "$ac1hi", "$ac1lo",
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"$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo"
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);
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}
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for (i = 0; i < (x_out_max & 0x3); ++i) {
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const uint32_t J = *frow++;
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const int v = (int)MULT_FIX(J, wrk->fy_scale);
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assert(v >= 0 && v <= 255);
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*dst++ = v;
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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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if (x_out_max >= 4) {
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int temp8, temp9, temp10, temp11;
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__asm__ volatile (
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"li %[temp8], 0x10000 \n\t"
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"li %[temp9], 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], 4(%[frow]) \n\t"
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"lw %[temp2], 8(%[frow]) \n\t"
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"lw %[temp3], 12(%[frow]) \n\t"
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"lw %[temp4], 0(%[irow]) \n\t"
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"lw %[temp5], 4(%[irow]) \n\t"
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"lw %[temp10], 8(%[irow]) \n\t"
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"lw %[temp11], 12(%[irow]) \n\t"
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"addiu %[dst], %[dst], 4 \n\t"
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"mult $ac0, %[temp8], %[temp9] \n\t"
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"maddu $ac0, %[A], %[temp0] \n\t"
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"maddu $ac0, %[B], %[temp4] \n\t"
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"mult $ac1, %[temp8], %[temp9] \n\t"
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"maddu $ac1, %[A], %[temp1] \n\t"
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"maddu $ac1, %[B], %[temp5] \n\t"
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"mult $ac2, %[temp8], %[temp9] \n\t"
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"maddu $ac2, %[A], %[temp2] \n\t"
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"maddu $ac2, %[B], %[temp10] \n\t"
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"mult $ac3, %[temp8], %[temp9] \n\t"
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"maddu $ac3, %[A], %[temp3] \n\t"
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"maddu $ac3, %[B], %[temp11] \n\t"
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"addiu %[frow], %[frow], 16 \n\t"
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"addiu %[irow], %[irow], 16 \n\t"
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"mfhi %[temp0], $ac0 \n\t"
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"mfhi %[temp1], $ac1 \n\t"
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"mfhi %[temp2], $ac2 \n\t"
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"mfhi %[temp3], $ac3 \n\t"
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"mult $ac0, %[temp8], %[temp9] \n\t"
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"maddu $ac0, %[temp0], %[temp7] \n\t"
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"mult $ac1, %[temp8], %[temp9] \n\t"
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"maddu $ac1, %[temp1], %[temp7] \n\t"
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"mult $ac2, %[temp8], %[temp9] \n\t"
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"maddu $ac2, %[temp2], %[temp7] \n\t"
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"mult $ac3, %[temp8], %[temp9] \n\t"
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"maddu $ac3, %[temp3], %[temp7] \n\t"
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"mfhi %[temp0], $ac0 \n\t"
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"mfhi %[temp1], $ac1 \n\t"
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"mfhi %[temp2], $ac2 \n\t"
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"mfhi %[temp3], $ac3 \n\t"
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"sb %[temp0], -4(%[dst]) \n\t"
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"sb %[temp1], -3(%[dst]) \n\t"
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"sb %[temp2], -2(%[dst]) \n\t"
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"sb %[temp3], -1(%[dst]) \n\t"
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"bne %[frow], %[loop_end], 1b \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
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[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow),
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[irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end),
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[temp8]"=&r"(temp8), [temp9]"=&r"(temp9), [temp10]"=&r"(temp10),
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[temp11]"=&r"(temp11), [temp2]"=&r"(temp2)
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: [temp7]"r"(temp7), [temp6]"r"(temp6), [A]"r"(A), [B]"r"(B)
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: "memory", "hi", "lo", "$ac1hi", "$ac1lo",
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"$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo"
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);
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}
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for (i = 0; i < (x_out_max & 0x3); ++i) {
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const uint64_t I = (uint64_t)A * *frow++
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+ (uint64_t)B * *irow++;
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const uint32_t J = (uint32_t)((I + ROUNDER) >> WEBP_RESCALER_RFIX);
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const int v = (int)MULT_FIX(J, wrk->fy_scale);
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assert(v >= 0 && v <= 255);
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*dst++ = v;
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}
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}
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}
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#undef MULT_FIX
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#undef ROUNDER
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//------------------------------------------------------------------------------
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// Entry point
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extern void WebPRescalerDspInitMIPSdspR2(void);
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WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void) {
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WebPRescalerExportRowExpand = ExportRowExpand;
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WebPRescalerExportRowShrink = ExportRowShrink;
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}
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#else // !WEBP_USE_MIPS_DSP_R2
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WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPSdspR2)
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#endif // WEBP_USE_MIPS_DSP_R2
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