1/* 2 * Copyright (c) 2012 3 * MIPS Technologies, Inc., California. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * Author: Bojan Zivkovic (bojan@mips.com) 30 * 31 * Compute antialias function optimised for MIPS fixed-point architecture 32 * 33 * This file is part of FFmpeg. 34 * 35 * FFmpeg is free software; you can redistribute it and/or 36 * modify it under the terms of the GNU Lesser General Public 37 * License as published by the Free Software Foundation; either 38 * version 2.1 of the License, or (at your option) any later version. 39 * 40 * FFmpeg is distributed in the hope that it will be useful, 41 * but WITHOUT ANY WARRANTY; without even the implied warranty of 42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 43 * Lesser General Public License for more details. 44 * 45 * You should have received a copy of the GNU Lesser General Public 46 * License along with FFmpeg; if not, write to the Free Software 47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 48 */ 49 50/** 51 * @file 52 * Reference: libavcodec/mpegaudiodec.c 53 */ 54 55#ifndef AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H 56#define AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H 57 58#if HAVE_INLINE_ASM 59static void compute_antialias_mips_fixed(MPADecodeContext *s, 60 GranuleDef *g) 61{ 62 int32_t *ptr, *csa; 63 int n, i; 64 int MAX_lo = 0xffffffff; 65 66 /* we antialias only "long" bands */ 67 if (g->block_type == 2) { 68 if (!g->switch_point) 69 return; 70 /* XXX: check this for 8000Hz case */ 71 n = 1; 72 } else { 73 n = SBLIMIT - 1; 74 } 75 76 77 ptr = g->sb_hybrid + 18; 78 79 for(i = n;i > 0;i--) { 80 int tmp0, tmp1, tmp2, tmp00, tmp11; 81 int temp_reg1, temp_reg2, temp_reg3, temp_reg4, temp_reg5, temp_reg6; 82 csa = &csa_table[0][0]; 83 84 /** 85 * instructions are scheduled to minimize pipeline stall. 86 */ 87 __asm__ volatile ( 88 "lw %[tmp0], -1*4(%[ptr]) \n\t" 89 "lw %[tmp1], 0*4(%[ptr]) \n\t" 90 "lw %[temp_reg1], 0*4(%[csa]) \n\t" 91 "lw %[temp_reg2], 2*4(%[csa]) \n\t" 92 "add %[tmp2], %[tmp0], %[tmp1] \n\t" 93 "lw %[temp_reg3], 3*4(%[csa]) \n\t" 94 "mult $ac0, %[tmp2], %[temp_reg1] \n\t" 95 "mult $ac1, %[tmp2], %[temp_reg1] \n\t" 96 "lw %[tmp00], -2*4(%[ptr]) \n\t" 97 "lw %[tmp11], 1*4(%[ptr]) \n\t" 98 "lw %[temp_reg4], 4*4(%[csa]) \n\t" 99 "mtlo %[MAX_lo], $ac0 \n\t" 100 "mtlo $zero, $ac1 \n\t" 101 "msub $ac0, %[tmp1], %[temp_reg2] \n\t" 102 "madd $ac1, %[tmp0], %[temp_reg3] \n\t" 103 "add %[tmp2], %[tmp00], %[tmp11] \n\t" 104 "lw %[temp_reg5], 6*4(%[csa]) \n\t" 105 "mult $ac2, %[tmp2], %[temp_reg4] \n\t" 106 "mult $ac3, %[tmp2], %[temp_reg4] \n\t" 107 "mfhi %[temp_reg1], $ac0 \n\t" 108 "mfhi %[temp_reg2], $ac1 \n\t" 109 "lw %[temp_reg6], 7*4(%[csa]) \n\t" 110 "mtlo %[MAX_lo], $ac2 \n\t" 111 "msub $ac2, %[tmp11], %[temp_reg5] \n\t" 112 "mtlo $zero, $ac3 \n\t" 113 "madd $ac3, %[tmp00], %[temp_reg6] \n\t" 114 "sll %[temp_reg1], %[temp_reg1], 2 \n\t" 115 "sw %[temp_reg1], -1*4(%[ptr]) \n\t" 116 "mfhi %[temp_reg4], $ac2 \n\t" 117 "sll %[temp_reg2], %[temp_reg2], 2 \n\t" 118 "mfhi %[temp_reg5], $ac3 \n\t" 119 "sw %[temp_reg2], 0*4(%[ptr]) \n\t" 120 "lw %[tmp0], -3*4(%[ptr]) \n\t" 121 "lw %[tmp1], 2*4(%[ptr]) \n\t" 122 "lw %[temp_reg1], 8*4(%[csa]) \n\t" 123 "sll %[temp_reg4], %[temp_reg4], 2 \n\t" 124 "add %[tmp2], %[tmp0], %[tmp1] \n\t" 125 "sll %[temp_reg5], %[temp_reg5], 2 \n\t" 126 "mult $ac0, %[tmp2], %[temp_reg1] \n\t" 127 "mult $ac1, %[tmp2], %[temp_reg1] \n\t" 128 "sw %[temp_reg4], -2*4(%[ptr]) \n\t" 129 "sw %[temp_reg5], 1*4(%[ptr]) \n\t" 130 "lw %[temp_reg2], 10*4(%[csa]) \n\t" 131 "mtlo %[MAX_lo], $ac0 \n\t" 132 "lw %[temp_reg3], 11*4(%[csa]) \n\t" 133 "msub $ac0, %[tmp1], %[temp_reg2] \n\t" 134 "mtlo $zero, $ac1 \n\t" 135 "madd $ac1, %[tmp0], %[temp_reg3] \n\t" 136 "lw %[tmp00], -4*4(%[ptr]) \n\t" 137 "lw %[tmp11], 3*4(%[ptr]) \n\t" 138 "mfhi %[temp_reg1], $ac0 \n\t" 139 "lw %[temp_reg4], 12*4(%[csa]) \n\t" 140 "mfhi %[temp_reg2], $ac1 \n\t" 141 "add %[tmp2], %[tmp00], %[tmp11] \n\t" 142 "mult $ac2, %[tmp2], %[temp_reg4] \n\t" 143 "mult $ac3, %[tmp2], %[temp_reg4] \n\t" 144 "lw %[temp_reg5], 14*4(%[csa]) \n\t" 145 "lw %[temp_reg6], 15*4(%[csa]) \n\t" 146 "sll %[temp_reg1], %[temp_reg1], 2 \n\t" 147 "mtlo %[MAX_lo], $ac2 \n\t" 148 "msub $ac2, %[tmp11], %[temp_reg5] \n\t" 149 "mtlo $zero, $ac3 \n\t" 150 "madd $ac3, %[tmp00], %[temp_reg6] \n\t" 151 "sll %[temp_reg2], %[temp_reg2], 2 \n\t" 152 "sw %[temp_reg1], -3*4(%[ptr]) \n\t" 153 "mfhi %[temp_reg4], $ac2 \n\t" 154 "sw %[temp_reg2], 2*4(%[ptr]) \n\t" 155 "mfhi %[temp_reg5], $ac3 \n\t" 156 "lw %[tmp0], -5*4(%[ptr]) \n\t" 157 "lw %[tmp1], 4*4(%[ptr]) \n\t" 158 "lw %[temp_reg1], 16*4(%[csa]) \n\t" 159 "lw %[temp_reg2], 18*4(%[csa]) \n\t" 160 "add %[tmp2], %[tmp0], %[tmp1] \n\t" 161 "lw %[temp_reg3], 19*4(%[csa]) \n\t" 162 "mult $ac0, %[tmp2], %[temp_reg1] \n\t" 163 "mult $ac1, %[tmp2], %[temp_reg1] \n\t" 164 "sll %[temp_reg4], %[temp_reg4], 2 \n\t" 165 "sll %[temp_reg5], %[temp_reg5], 2 \n\t" 166 "sw %[temp_reg4], -4*4(%[ptr]) \n\t" 167 "mtlo %[MAX_lo], $ac0 \n\t" 168 "msub $ac0, %[tmp1], %[temp_reg2] \n\t" 169 "mtlo $zero, $ac1 \n\t" 170 "madd $ac1, %[tmp0], %[temp_reg3] \n\t" 171 "sw %[temp_reg5], 3*4(%[ptr]) \n\t" 172 "lw %[tmp00], -6*4(%[ptr]) \n\t" 173 "mfhi %[temp_reg1], $ac0 \n\t" 174 "lw %[tmp11], 5*4(%[ptr]) \n\t" 175 "mfhi %[temp_reg2], $ac1 \n\t" 176 "lw %[temp_reg4], 20*4(%[csa]) \n\t" 177 "add %[tmp2], %[tmp00], %[tmp11] \n\t" 178 "lw %[temp_reg5], 22*4(%[csa]) \n\t" 179 "mult $ac2, %[tmp2], %[temp_reg4] \n\t" 180 "mult $ac3, %[tmp2], %[temp_reg4] \n\t" 181 "lw %[temp_reg6], 23*4(%[csa]) \n\t" 182 "sll %[temp_reg1], %[temp_reg1], 2 \n\t" 183 "sll %[temp_reg2], %[temp_reg2], 2 \n\t" 184 "mtlo %[MAX_lo], $ac2 \n\t" 185 "msub $ac2, %[tmp11], %[temp_reg5] \n\t" 186 "mtlo $zero, $ac3 \n\t" 187 "madd $ac3, %[tmp00], %[temp_reg6] \n\t" 188 "sw %[temp_reg1], -5*4(%[ptr]) \n\t" 189 "sw %[temp_reg2], 4*4(%[ptr]) \n\t" 190 "mfhi %[temp_reg4], $ac2 \n\t" 191 "lw %[tmp0], -7*4(%[ptr]) \n\t" 192 "mfhi %[temp_reg5], $ac3 \n\t" 193 "lw %[tmp1], 6*4(%[ptr]) \n\t" 194 "lw %[temp_reg1], 24*4(%[csa]) \n\t" 195 "lw %[temp_reg2], 26*4(%[csa]) \n\t" 196 "add %[tmp2], %[tmp0], %[tmp1] \n\t" 197 "lw %[temp_reg3], 27*4(%[csa]) \n\t" 198 "mult $ac0, %[tmp2], %[temp_reg1] \n\t" 199 "mult $ac1, %[tmp2], %[temp_reg1] \n\t" 200 "sll %[temp_reg4], %[temp_reg4], 2 \n\t" 201 "sll %[temp_reg5], %[temp_reg5], 2 \n\t" 202 "sw %[temp_reg4], -6*4(%[ptr]) \n\t" 203 "mtlo %[MAX_lo], $ac0 \n\t" 204 "msub $ac0, %[tmp1], %[temp_reg2] \n\t" 205 "mtlo $zero, $ac1 \n\t" 206 "madd $ac1, %[tmp0], %[temp_reg3] \n\t" 207 "sw %[temp_reg5], 5*4(%[ptr]) \n\t" 208 "lw %[tmp00], -8*4(%[ptr]) \n\t" 209 "mfhi %[temp_reg1], $ac0 \n\t" 210 "lw %[tmp11], 7*4(%[ptr]) \n\t" 211 "mfhi %[temp_reg2], $ac1 \n\t" 212 "lw %[temp_reg4], 28*4(%[csa]) \n\t" 213 "add %[tmp2], %[tmp00], %[tmp11] \n\t" 214 "lw %[temp_reg5], 30*4(%[csa]) \n\t" 215 "mult $ac2, %[tmp2], %[temp_reg4] \n\t" 216 "mult $ac3, %[tmp2], %[temp_reg4] \n\t" 217 "lw %[temp_reg6], 31*4(%[csa]) \n\t" 218 "sll %[temp_reg1], %[temp_reg1], 2 \n\t" 219 "sll %[temp_reg2], %[temp_reg2], 2 \n\t" 220 "mtlo %[MAX_lo], $ac2 \n\t" 221 "msub $ac2, %[tmp11], %[temp_reg5] \n\t" 222 "mtlo $zero, $ac3 \n\t" 223 "madd $ac3, %[tmp00], %[temp_reg6] \n\t" 224 "sw %[temp_reg1], -7*4(%[ptr]) \n\t" 225 "sw %[temp_reg2], 6*4(%[ptr]) \n\t" 226 "mfhi %[temp_reg4], $ac2 \n\t" 227 "mfhi %[temp_reg5], $ac3 \n\t" 228 "sll %[temp_reg4], %[temp_reg4], 2 \n\t" 229 "sll %[temp_reg5], %[temp_reg5], 2 \n\t" 230 "sw %[temp_reg4], -8*4(%[ptr]) \n\t" 231 "sw %[temp_reg5], 7*4(%[ptr]) \n\t" 232 233 : [tmp0] "=&r" (tmp0), [tmp1] "=&r" (tmp1), [tmp2] "=&r" (tmp2), 234 [tmp00] "=&r" (tmp00), [tmp11] "=&r" (tmp11), 235 [temp_reg1] "=&r" (temp_reg1), [temp_reg2] "=&r" (temp_reg2), 236 [temp_reg3] "=&r" (temp_reg3), [temp_reg4] "=&r" (temp_reg4), 237 [temp_reg5] "=&r" (temp_reg5), [temp_reg6] "=&r" (temp_reg6) 238 : [csa] "r" (csa), [ptr] "r" (ptr), 239 [MAX_lo] "r" (MAX_lo) 240 : "memory", "hi", "lo", "$ac1hi", "$ac1lo", "$ac2hi", "$ac2lo", 241 "$ac3hi", "$ac3lo" 242 ); 243 244 ptr += 18; 245 } 246} 247#define compute_antialias compute_antialias_mips_fixed 248#endif /* HAVE_INLINE_ASM */ 249 250#endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H */ 251