17c8da7ce66017295a65ec028084b90800be377f8James Zern// Copyright 2014 Google Inc. All Rights Reserved. 27c8da7ce66017295a65ec028084b90800be377f8James Zern// 37c8da7ce66017295a65ec028084b90800be377f8James Zern// Use of this source code is governed by a BSD-style license 47c8da7ce66017295a65ec028084b90800be377f8James Zern// that can be found in the COPYING file in the root of the source 57c8da7ce66017295a65ec028084b90800be377f8James Zern// tree. An additional intellectual property rights grant can be found 67c8da7ce66017295a65ec028084b90800be377f8James Zern// in the file PATENTS. All contributing project authors may 77c8da7ce66017295a65ec028084b90800be377f8James Zern// be found in the AUTHORS file in the root of the source tree. 87c8da7ce66017295a65ec028084b90800be377f8James Zern// ----------------------------------------------------------------------------- 97c8da7ce66017295a65ec028084b90800be377f8James Zern// 107c8da7ce66017295a65ec028084b90800be377f8James Zern// Utilities for processing transparent channel. 117c8da7ce66017295a65ec028084b90800be377f8James Zern// 127c8da7ce66017295a65ec028084b90800be377f8James Zern// Author(s): Branimir Vasic (branimir.vasic@imgtec.com) 137c8da7ce66017295a65ec028084b90800be377f8James Zern// Djordje Pesut (djordje.pesut@imgtec.com) 147c8da7ce66017295a65ec028084b90800be377f8James Zern 157c8da7ce66017295a65ec028084b90800be377f8James Zern#include "./dsp.h" 167c8da7ce66017295a65ec028084b90800be377f8James Zern 177c8da7ce66017295a65ec028084b90800be377f8James Zern#if defined(WEBP_USE_MIPS_DSP_R2) 187c8da7ce66017295a65ec028084b90800be377f8James Zern 197c8da7ce66017295a65ec028084b90800be377f8James Zernstatic int DispatchAlpha(const uint8_t* alpha, int alpha_stride, 207c8da7ce66017295a65ec028084b90800be377f8James Zern int width, int height, 217c8da7ce66017295a65ec028084b90800be377f8James Zern uint8_t* dst, int dst_stride) { 227c8da7ce66017295a65ec028084b90800be377f8James Zern uint32_t alpha_mask = 0xffffffff; 237c8da7ce66017295a65ec028084b90800be377f8James Zern int i, j, temp0; 247c8da7ce66017295a65ec028084b90800be377f8James Zern 257c8da7ce66017295a65ec028084b90800be377f8James Zern for (j = 0; j < height; ++j) { 267c8da7ce66017295a65ec028084b90800be377f8James Zern uint8_t* pdst = dst; 277c8da7ce66017295a65ec028084b90800be377f8James Zern const uint8_t* palpha = alpha; 287c8da7ce66017295a65ec028084b90800be377f8James Zern for (i = 0; i < (width >> 2); ++i) { 297c8da7ce66017295a65ec028084b90800be377f8James Zern int temp1, temp2, temp3; 307c8da7ce66017295a65ec028084b90800be377f8James Zern 317c8da7ce66017295a65ec028084b90800be377f8James Zern __asm__ volatile ( 327c8da7ce66017295a65ec028084b90800be377f8James Zern "ulw %[temp0], 0(%[palpha]) \n\t" 337c8da7ce66017295a65ec028084b90800be377f8James Zern "addiu %[palpha], %[palpha], 4 \n\t" 347c8da7ce66017295a65ec028084b90800be377f8James Zern "addiu %[pdst], %[pdst], 16 \n\t" 357c8da7ce66017295a65ec028084b90800be377f8James Zern "srl %[temp1], %[temp0], 8 \n\t" 367c8da7ce66017295a65ec028084b90800be377f8James Zern "srl %[temp2], %[temp0], 16 \n\t" 377c8da7ce66017295a65ec028084b90800be377f8James Zern "srl %[temp3], %[temp0], 24 \n\t" 387c8da7ce66017295a65ec028084b90800be377f8James Zern "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" 397c8da7ce66017295a65ec028084b90800be377f8James Zern "sb %[temp0], -16(%[pdst]) \n\t" 407c8da7ce66017295a65ec028084b90800be377f8James Zern "sb %[temp1], -12(%[pdst]) \n\t" 417c8da7ce66017295a65ec028084b90800be377f8James Zern "sb %[temp2], -8(%[pdst]) \n\t" 427c8da7ce66017295a65ec028084b90800be377f8James Zern "sb %[temp3], -4(%[pdst]) \n\t" 437c8da7ce66017295a65ec028084b90800be377f8James Zern : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), 447c8da7ce66017295a65ec028084b90800be377f8James Zern [temp3]"=&r"(temp3), [palpha]"+r"(palpha), [pdst]"+r"(pdst), 457c8da7ce66017295a65ec028084b90800be377f8James Zern [alpha_mask]"+r"(alpha_mask) 467c8da7ce66017295a65ec028084b90800be377f8James Zern : 477c8da7ce66017295a65ec028084b90800be377f8James Zern : "memory" 487c8da7ce66017295a65ec028084b90800be377f8James Zern ); 497c8da7ce66017295a65ec028084b90800be377f8James Zern } 507c8da7ce66017295a65ec028084b90800be377f8James Zern 517c8da7ce66017295a65ec028084b90800be377f8James Zern for (i = 0; i < (width & 3); ++i) { 527c8da7ce66017295a65ec028084b90800be377f8James Zern __asm__ volatile ( 537c8da7ce66017295a65ec028084b90800be377f8James Zern "lbu %[temp0], 0(%[palpha]) \n\t" 547c8da7ce66017295a65ec028084b90800be377f8James Zern "addiu %[palpha], %[palpha], 1 \n\t" 557c8da7ce66017295a65ec028084b90800be377f8James Zern "sb %[temp0], 0(%[pdst]) \n\t" 567c8da7ce66017295a65ec028084b90800be377f8James Zern "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" 577c8da7ce66017295a65ec028084b90800be377f8James Zern "addiu %[pdst], %[pdst], 4 \n\t" 587c8da7ce66017295a65ec028084b90800be377f8James Zern : [temp0]"=&r"(temp0), [palpha]"+r"(palpha), [pdst]"+r"(pdst), 597c8da7ce66017295a65ec028084b90800be377f8James Zern [alpha_mask]"+r"(alpha_mask) 607c8da7ce66017295a65ec028084b90800be377f8James Zern : 617c8da7ce66017295a65ec028084b90800be377f8James Zern : "memory" 627c8da7ce66017295a65ec028084b90800be377f8James Zern ); 637c8da7ce66017295a65ec028084b90800be377f8James Zern } 647c8da7ce66017295a65ec028084b90800be377f8James Zern alpha += alpha_stride; 657c8da7ce66017295a65ec028084b90800be377f8James Zern dst += dst_stride; 667c8da7ce66017295a65ec028084b90800be377f8James Zern } 677c8da7ce66017295a65ec028084b90800be377f8James Zern 687c8da7ce66017295a65ec028084b90800be377f8James Zern __asm__ volatile ( 697c8da7ce66017295a65ec028084b90800be377f8James Zern "ext %[temp0], %[alpha_mask], 0, 16 \n\t" 707c8da7ce66017295a65ec028084b90800be377f8James Zern "srl %[alpha_mask], %[alpha_mask], 16 \n\t" 717c8da7ce66017295a65ec028084b90800be377f8James Zern "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" 727c8da7ce66017295a65ec028084b90800be377f8James Zern "ext %[temp0], %[alpha_mask], 0, 8 \n\t" 737c8da7ce66017295a65ec028084b90800be377f8James Zern "srl %[alpha_mask], %[alpha_mask], 8 \n\t" 747c8da7ce66017295a65ec028084b90800be377f8James Zern "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" 757c8da7ce66017295a65ec028084b90800be377f8James Zern : [temp0]"=&r"(temp0), [alpha_mask]"+r"(alpha_mask) 767c8da7ce66017295a65ec028084b90800be377f8James Zern : 777c8da7ce66017295a65ec028084b90800be377f8James Zern ); 787c8da7ce66017295a65ec028084b90800be377f8James Zern 797c8da7ce66017295a65ec028084b90800be377f8James Zern return (alpha_mask != 0xff); 807c8da7ce66017295a65ec028084b90800be377f8James Zern} 817c8da7ce66017295a65ec028084b90800be377f8James Zern 827c8da7ce66017295a65ec028084b90800be377f8James Zernstatic void MultARGBRow(uint32_t* const ptr, int width, int inverse) { 837c8da7ce66017295a65ec028084b90800be377f8James Zern int x; 847c8da7ce66017295a65ec028084b90800be377f8James Zern const uint32_t c_00ffffff = 0x00ffffffu; 857c8da7ce66017295a65ec028084b90800be377f8James Zern const uint32_t c_ff000000 = 0xff000000u; 867c8da7ce66017295a65ec028084b90800be377f8James Zern const uint32_t c_8000000 = 0x00800000u; 877c8da7ce66017295a65ec028084b90800be377f8James Zern const uint32_t c_8000080 = 0x00800080u; 887c8da7ce66017295a65ec028084b90800be377f8James Zern for (x = 0; x < width; ++x) { 897c8da7ce66017295a65ec028084b90800be377f8James Zern const uint32_t argb = ptr[x]; 907c8da7ce66017295a65ec028084b90800be377f8James Zern if (argb < 0xff000000u) { // alpha < 255 917c8da7ce66017295a65ec028084b90800be377f8James Zern if (argb <= 0x00ffffffu) { // alpha == 0 927c8da7ce66017295a65ec028084b90800be377f8James Zern ptr[x] = 0; 937c8da7ce66017295a65ec028084b90800be377f8James Zern } else { 947c8da7ce66017295a65ec028084b90800be377f8James Zern int temp0, temp1, temp2, temp3, alpha; 957c8da7ce66017295a65ec028084b90800be377f8James Zern __asm__ volatile ( 967c8da7ce66017295a65ec028084b90800be377f8James Zern "srl %[alpha], %[argb], 24 \n\t" 977c8da7ce66017295a65ec028084b90800be377f8James Zern "replv.qb %[temp0], %[alpha] \n\t" 987c8da7ce66017295a65ec028084b90800be377f8James Zern "and %[temp0], %[temp0], %[c_00ffffff] \n\t" 997c8da7ce66017295a65ec028084b90800be377f8James Zern "beqz %[inverse], 0f \n\t" 1007c8da7ce66017295a65ec028084b90800be377f8James Zern "divu $zero, %[c_ff000000], %[alpha] \n\t" 1017c8da7ce66017295a65ec028084b90800be377f8James Zern "mflo %[temp0] \n\t" 1027c8da7ce66017295a65ec028084b90800be377f8James Zern "0: \n\t" 1037c8da7ce66017295a65ec028084b90800be377f8James Zern "andi %[temp1], %[argb], 0xff \n\t" 1047c8da7ce66017295a65ec028084b90800be377f8James Zern "ext %[temp2], %[argb], 8, 8 \n\t" 1057c8da7ce66017295a65ec028084b90800be377f8James Zern "ext %[temp3], %[argb], 16, 8 \n\t" 1067c8da7ce66017295a65ec028084b90800be377f8James Zern "mul %[temp1], %[temp1], %[temp0] \n\t" 1077c8da7ce66017295a65ec028084b90800be377f8James Zern "mul %[temp2], %[temp2], %[temp0] \n\t" 1087c8da7ce66017295a65ec028084b90800be377f8James Zern "mul %[temp3], %[temp3], %[temp0] \n\t" 1097c8da7ce66017295a65ec028084b90800be377f8James Zern "precrq.ph.w %[temp1], %[temp2], %[temp1] \n\t" 1107c8da7ce66017295a65ec028084b90800be377f8James Zern "addu %[temp3], %[temp3], %[c_8000000] \n\t" 1117c8da7ce66017295a65ec028084b90800be377f8James Zern "addu %[temp1], %[temp1], %[c_8000080] \n\t" 1127c8da7ce66017295a65ec028084b90800be377f8James Zern "precrq.ph.w %[temp3], %[argb], %[temp3] \n\t" 1137c8da7ce66017295a65ec028084b90800be377f8James Zern "precrq.qb.ph %[temp1], %[temp3], %[temp1] \n\t" 1147c8da7ce66017295a65ec028084b90800be377f8James Zern : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), 1157c8da7ce66017295a65ec028084b90800be377f8James Zern [temp3]"=&r"(temp3), [alpha]"=&r"(alpha) 1167c8da7ce66017295a65ec028084b90800be377f8James Zern : [inverse]"r"(inverse), [c_00ffffff]"r"(c_00ffffff), 1177c8da7ce66017295a65ec028084b90800be377f8James Zern [c_8000000]"r"(c_8000000), [c_8000080]"r"(c_8000080), 1187c8da7ce66017295a65ec028084b90800be377f8James Zern [c_ff000000]"r"(c_ff000000), [argb]"r"(argb) 1197c8da7ce66017295a65ec028084b90800be377f8James Zern : "memory", "hi", "lo" 1207c8da7ce66017295a65ec028084b90800be377f8James Zern ); 1217c8da7ce66017295a65ec028084b90800be377f8James Zern ptr[x] = temp1; 1227c8da7ce66017295a65ec028084b90800be377f8James Zern } 1237c8da7ce66017295a65ec028084b90800be377f8James Zern } 1247c8da7ce66017295a65ec028084b90800be377f8James Zern } 1257c8da7ce66017295a65ec028084b90800be377f8James Zern} 1267c8da7ce66017295a65ec028084b90800be377f8James Zern 1277c8da7ce66017295a65ec028084b90800be377f8James Zern//------------------------------------------------------------------------------ 1287c8da7ce66017295a65ec028084b90800be377f8James Zern// Entry point 1297c8da7ce66017295a65ec028084b90800be377f8James Zern 1307c8da7ce66017295a65ec028084b90800be377f8James Zernextern void WebPInitAlphaProcessingMIPSdspR2(void); 1317c8da7ce66017295a65ec028084b90800be377f8James Zern 1327c8da7ce66017295a65ec028084b90800be377f8James ZernWEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessingMIPSdspR2(void) { 1337c8da7ce66017295a65ec028084b90800be377f8James Zern WebPDispatchAlpha = DispatchAlpha; 1347c8da7ce66017295a65ec028084b90800be377f8James Zern WebPMultARGBRow = MultARGBRow; 1357c8da7ce66017295a65ec028084b90800be377f8James Zern} 1367c8da7ce66017295a65ec028084b90800be377f8James Zern 1377c8da7ce66017295a65ec028084b90800be377f8James Zern#else // !WEBP_USE_MIPS_DSP_R2 1387c8da7ce66017295a65ec028084b90800be377f8James Zern 1397c8da7ce66017295a65ec028084b90800be377f8James ZernWEBP_DSP_INIT_STUB(WebPInitAlphaProcessingMIPSdspR2) 1407c8da7ce66017295a65ec028084b90800be377f8James Zern 1417c8da7ce66017295a65ec028084b90800be377f8James Zern#endif // WEBP_USE_MIPS_DSP_R2 142