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annotate ffmpeg/libavcodec/mips/compute_antialias_fixed.h @ 13:844d341cf643 tip

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author Yading Song <yading.song@eecs.qmul.ac.uk>
date Thu, 31 Oct 2013 13:17:06 +0000
parents 6840f77b83aa
children
rev   line source
yading@10 1 /*
yading@10 2 * Copyright (c) 2012
yading@10 3 * MIPS Technologies, Inc., California.
yading@10 4 *
yading@10 5 * Redistribution and use in source and binary forms, with or without
yading@10 6 * modification, are permitted provided that the following conditions
yading@10 7 * are met:
yading@10 8 * 1. Redistributions of source code must retain the above copyright
yading@10 9 * notice, this list of conditions and the following disclaimer.
yading@10 10 * 2. Redistributions in binary form must reproduce the above copyright
yading@10 11 * notice, this list of conditions and the following disclaimer in the
yading@10 12 * documentation and/or other materials provided with the distribution.
yading@10 13 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
yading@10 14 * contributors may be used to endorse or promote products derived from
yading@10 15 * this software without specific prior written permission.
yading@10 16 *
yading@10 17 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
yading@10 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
yading@10 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
yading@10 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
yading@10 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
yading@10 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
yading@10 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
yading@10 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
yading@10 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
yading@10 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
yading@10 27 * SUCH DAMAGE.
yading@10 28 *
yading@10 29 * Author: Bojan Zivkovic (bojan@mips.com)
yading@10 30 *
yading@10 31 * Compute antialias function optimised for MIPS fixed-point architecture
yading@10 32 *
yading@10 33 * This file is part of FFmpeg.
yading@10 34 *
yading@10 35 * FFmpeg is free software; you can redistribute it and/or
yading@10 36 * modify it under the terms of the GNU Lesser General Public
yading@10 37 * License as published by the Free Software Foundation; either
yading@10 38 * version 2.1 of the License, or (at your option) any later version.
yading@10 39 *
yading@10 40 * FFmpeg is distributed in the hope that it will be useful,
yading@10 41 * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10 42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
yading@10 43 * Lesser General Public License for more details.
yading@10 44 *
yading@10 45 * You should have received a copy of the GNU Lesser General Public
yading@10 46 * License along with FFmpeg; if not, write to the Free Software
yading@10 47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10 48 */
yading@10 49
yading@10 50 /**
yading@10 51 * @file
yading@10 52 * Reference: libavcodec/mpegaudiodec.c
yading@10 53 */
yading@10 54
yading@10 55 #ifndef AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H
yading@10 56 #define AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H
yading@10 57
yading@10 58 #if HAVE_INLINE_ASM
yading@10 59 static void compute_antialias_mips_fixed(MPADecodeContext *s,
yading@10 60 GranuleDef *g)
yading@10 61 {
yading@10 62 int32_t *ptr, *csa;
yading@10 63 int n, i;
yading@10 64 int MAX_lo = 0xffffffff;
yading@10 65
yading@10 66 /* we antialias only "long" bands */
yading@10 67 if (g->block_type == 2) {
yading@10 68 if (!g->switch_point)
yading@10 69 return;
yading@10 70 /* XXX: check this for 8000Hz case */
yading@10 71 n = 1;
yading@10 72 } else {
yading@10 73 n = SBLIMIT - 1;
yading@10 74 }
yading@10 75
yading@10 76
yading@10 77 ptr = g->sb_hybrid + 18;
yading@10 78
yading@10 79 for(i = n;i > 0;i--) {
yading@10 80 int tmp0, tmp1, tmp2, tmp00, tmp11;
yading@10 81 int temp_reg1, temp_reg2, temp_reg3, temp_reg4, temp_reg5, temp_reg6;
yading@10 82 csa = &csa_table[0][0];
yading@10 83
yading@10 84 /**
yading@10 85 * instructions are scheduled to minimize pipeline stall.
yading@10 86 */
yading@10 87 __asm__ volatile (
yading@10 88 "lw %[tmp0], -1*4(%[ptr]) \n\t"
yading@10 89 "lw %[tmp1], 0*4(%[ptr]) \n\t"
yading@10 90 "lw %[temp_reg1], 0*4(%[csa]) \n\t"
yading@10 91 "lw %[temp_reg2], 2*4(%[csa]) \n\t"
yading@10 92 "add %[tmp2], %[tmp0], %[tmp1] \n\t"
yading@10 93 "lw %[temp_reg3], 3*4(%[csa]) \n\t"
yading@10 94 "mult $ac0, %[tmp2], %[temp_reg1] \n\t"
yading@10 95 "mult $ac1, %[tmp2], %[temp_reg1] \n\t"
yading@10 96 "lw %[tmp00], -2*4(%[ptr]) \n\t"
yading@10 97 "lw %[tmp11], 1*4(%[ptr]) \n\t"
yading@10 98 "lw %[temp_reg4], 4*4(%[csa]) \n\t"
yading@10 99 "mtlo %[MAX_lo], $ac0 \n\t"
yading@10 100 "mtlo $zero, $ac1 \n\t"
yading@10 101 "msub $ac0, %[tmp1], %[temp_reg2] \n\t"
yading@10 102 "madd $ac1, %[tmp0], %[temp_reg3] \n\t"
yading@10 103 "add %[tmp2], %[tmp00], %[tmp11] \n\t"
yading@10 104 "lw %[temp_reg5], 6*4(%[csa]) \n\t"
yading@10 105 "mult $ac2, %[tmp2], %[temp_reg4] \n\t"
yading@10 106 "mult $ac3, %[tmp2], %[temp_reg4] \n\t"
yading@10 107 "mfhi %[temp_reg1], $ac0 \n\t"
yading@10 108 "mfhi %[temp_reg2], $ac1 \n\t"
yading@10 109 "lw %[temp_reg6], 7*4(%[csa]) \n\t"
yading@10 110 "mtlo %[MAX_lo], $ac2 \n\t"
yading@10 111 "msub $ac2, %[tmp11], %[temp_reg5] \n\t"
yading@10 112 "mtlo $zero, $ac3 \n\t"
yading@10 113 "madd $ac3, %[tmp00], %[temp_reg6] \n\t"
yading@10 114 "sll %[temp_reg1], %[temp_reg1], 2 \n\t"
yading@10 115 "sw %[temp_reg1], -1*4(%[ptr]) \n\t"
yading@10 116 "mfhi %[temp_reg4], $ac2 \n\t"
yading@10 117 "sll %[temp_reg2], %[temp_reg2], 2 \n\t"
yading@10 118 "mfhi %[temp_reg5], $ac3 \n\t"
yading@10 119 "sw %[temp_reg2], 0*4(%[ptr]) \n\t"
yading@10 120 "lw %[tmp0], -3*4(%[ptr]) \n\t"
yading@10 121 "lw %[tmp1], 2*4(%[ptr]) \n\t"
yading@10 122 "lw %[temp_reg1], 8*4(%[csa]) \n\t"
yading@10 123 "sll %[temp_reg4], %[temp_reg4], 2 \n\t"
yading@10 124 "add %[tmp2], %[tmp0], %[tmp1] \n\t"
yading@10 125 "sll %[temp_reg5], %[temp_reg5], 2 \n\t"
yading@10 126 "mult $ac0, %[tmp2], %[temp_reg1] \n\t"
yading@10 127 "mult $ac1, %[tmp2], %[temp_reg1] \n\t"
yading@10 128 "sw %[temp_reg4], -2*4(%[ptr]) \n\t"
yading@10 129 "sw %[temp_reg5], 1*4(%[ptr]) \n\t"
yading@10 130 "lw %[temp_reg2], 10*4(%[csa]) \n\t"
yading@10 131 "mtlo %[MAX_lo], $ac0 \n\t"
yading@10 132 "lw %[temp_reg3], 11*4(%[csa]) \n\t"
yading@10 133 "msub $ac0, %[tmp1], %[temp_reg2] \n\t"
yading@10 134 "mtlo $zero, $ac1 \n\t"
yading@10 135 "madd $ac1, %[tmp0], %[temp_reg3] \n\t"
yading@10 136 "lw %[tmp00], -4*4(%[ptr]) \n\t"
yading@10 137 "lw %[tmp11], 3*4(%[ptr]) \n\t"
yading@10 138 "mfhi %[temp_reg1], $ac0 \n\t"
yading@10 139 "lw %[temp_reg4], 12*4(%[csa]) \n\t"
yading@10 140 "mfhi %[temp_reg2], $ac1 \n\t"
yading@10 141 "add %[tmp2], %[tmp00], %[tmp11] \n\t"
yading@10 142 "mult $ac2, %[tmp2], %[temp_reg4] \n\t"
yading@10 143 "mult $ac3, %[tmp2], %[temp_reg4] \n\t"
yading@10 144 "lw %[temp_reg5], 14*4(%[csa]) \n\t"
yading@10 145 "lw %[temp_reg6], 15*4(%[csa]) \n\t"
yading@10 146 "sll %[temp_reg1], %[temp_reg1], 2 \n\t"
yading@10 147 "mtlo %[MAX_lo], $ac2 \n\t"
yading@10 148 "msub $ac2, %[tmp11], %[temp_reg5] \n\t"
yading@10 149 "mtlo $zero, $ac3 \n\t"
yading@10 150 "madd $ac3, %[tmp00], %[temp_reg6] \n\t"
yading@10 151 "sll %[temp_reg2], %[temp_reg2], 2 \n\t"
yading@10 152 "sw %[temp_reg1], -3*4(%[ptr]) \n\t"
yading@10 153 "mfhi %[temp_reg4], $ac2 \n\t"
yading@10 154 "sw %[temp_reg2], 2*4(%[ptr]) \n\t"
yading@10 155 "mfhi %[temp_reg5], $ac3 \n\t"
yading@10 156 "lw %[tmp0], -5*4(%[ptr]) \n\t"
yading@10 157 "lw %[tmp1], 4*4(%[ptr]) \n\t"
yading@10 158 "lw %[temp_reg1], 16*4(%[csa]) \n\t"
yading@10 159 "lw %[temp_reg2], 18*4(%[csa]) \n\t"
yading@10 160 "add %[tmp2], %[tmp0], %[tmp1] \n\t"
yading@10 161 "lw %[temp_reg3], 19*4(%[csa]) \n\t"
yading@10 162 "mult $ac0, %[tmp2], %[temp_reg1] \n\t"
yading@10 163 "mult $ac1, %[tmp2], %[temp_reg1] \n\t"
yading@10 164 "sll %[temp_reg4], %[temp_reg4], 2 \n\t"
yading@10 165 "sll %[temp_reg5], %[temp_reg5], 2 \n\t"
yading@10 166 "sw %[temp_reg4], -4*4(%[ptr]) \n\t"
yading@10 167 "mtlo %[MAX_lo], $ac0 \n\t"
yading@10 168 "msub $ac0, %[tmp1], %[temp_reg2] \n\t"
yading@10 169 "mtlo $zero, $ac1 \n\t"
yading@10 170 "madd $ac1, %[tmp0], %[temp_reg3] \n\t"
yading@10 171 "sw %[temp_reg5], 3*4(%[ptr]) \n\t"
yading@10 172 "lw %[tmp00], -6*4(%[ptr]) \n\t"
yading@10 173 "mfhi %[temp_reg1], $ac0 \n\t"
yading@10 174 "lw %[tmp11], 5*4(%[ptr]) \n\t"
yading@10 175 "mfhi %[temp_reg2], $ac1 \n\t"
yading@10 176 "lw %[temp_reg4], 20*4(%[csa]) \n\t"
yading@10 177 "add %[tmp2], %[tmp00], %[tmp11] \n\t"
yading@10 178 "lw %[temp_reg5], 22*4(%[csa]) \n\t"
yading@10 179 "mult $ac2, %[tmp2], %[temp_reg4] \n\t"
yading@10 180 "mult $ac3, %[tmp2], %[temp_reg4] \n\t"
yading@10 181 "lw %[temp_reg6], 23*4(%[csa]) \n\t"
yading@10 182 "sll %[temp_reg1], %[temp_reg1], 2 \n\t"
yading@10 183 "sll %[temp_reg2], %[temp_reg2], 2 \n\t"
yading@10 184 "mtlo %[MAX_lo], $ac2 \n\t"
yading@10 185 "msub $ac2, %[tmp11], %[temp_reg5] \n\t"
yading@10 186 "mtlo $zero, $ac3 \n\t"
yading@10 187 "madd $ac3, %[tmp00], %[temp_reg6] \n\t"
yading@10 188 "sw %[temp_reg1], -5*4(%[ptr]) \n\t"
yading@10 189 "sw %[temp_reg2], 4*4(%[ptr]) \n\t"
yading@10 190 "mfhi %[temp_reg4], $ac2 \n\t"
yading@10 191 "lw %[tmp0], -7*4(%[ptr]) \n\t"
yading@10 192 "mfhi %[temp_reg5], $ac3 \n\t"
yading@10 193 "lw %[tmp1], 6*4(%[ptr]) \n\t"
yading@10 194 "lw %[temp_reg1], 24*4(%[csa]) \n\t"
yading@10 195 "lw %[temp_reg2], 26*4(%[csa]) \n\t"
yading@10 196 "add %[tmp2], %[tmp0], %[tmp1] \n\t"
yading@10 197 "lw %[temp_reg3], 27*4(%[csa]) \n\t"
yading@10 198 "mult $ac0, %[tmp2], %[temp_reg1] \n\t"
yading@10 199 "mult $ac1, %[tmp2], %[temp_reg1] \n\t"
yading@10 200 "sll %[temp_reg4], %[temp_reg4], 2 \n\t"
yading@10 201 "sll %[temp_reg5], %[temp_reg5], 2 \n\t"
yading@10 202 "sw %[temp_reg4], -6*4(%[ptr]) \n\t"
yading@10 203 "mtlo %[MAX_lo], $ac0 \n\t"
yading@10 204 "msub $ac0, %[tmp1], %[temp_reg2] \n\t"
yading@10 205 "mtlo $zero, $ac1 \n\t"
yading@10 206 "madd $ac1, %[tmp0], %[temp_reg3] \n\t"
yading@10 207 "sw %[temp_reg5], 5*4(%[ptr]) \n\t"
yading@10 208 "lw %[tmp00], -8*4(%[ptr]) \n\t"
yading@10 209 "mfhi %[temp_reg1], $ac0 \n\t"
yading@10 210 "lw %[tmp11], 7*4(%[ptr]) \n\t"
yading@10 211 "mfhi %[temp_reg2], $ac1 \n\t"
yading@10 212 "lw %[temp_reg4], 28*4(%[csa]) \n\t"
yading@10 213 "add %[tmp2], %[tmp00], %[tmp11] \n\t"
yading@10 214 "lw %[temp_reg5], 30*4(%[csa]) \n\t"
yading@10 215 "mult $ac2, %[tmp2], %[temp_reg4] \n\t"
yading@10 216 "mult $ac3, %[tmp2], %[temp_reg4] \n\t"
yading@10 217 "lw %[temp_reg6], 31*4(%[csa]) \n\t"
yading@10 218 "sll %[temp_reg1], %[temp_reg1], 2 \n\t"
yading@10 219 "sll %[temp_reg2], %[temp_reg2], 2 \n\t"
yading@10 220 "mtlo %[MAX_lo], $ac2 \n\t"
yading@10 221 "msub $ac2, %[tmp11], %[temp_reg5] \n\t"
yading@10 222 "mtlo $zero, $ac3 \n\t"
yading@10 223 "madd $ac3, %[tmp00], %[temp_reg6] \n\t"
yading@10 224 "sw %[temp_reg1], -7*4(%[ptr]) \n\t"
yading@10 225 "sw %[temp_reg2], 6*4(%[ptr]) \n\t"
yading@10 226 "mfhi %[temp_reg4], $ac2 \n\t"
yading@10 227 "mfhi %[temp_reg5], $ac3 \n\t"
yading@10 228 "sll %[temp_reg4], %[temp_reg4], 2 \n\t"
yading@10 229 "sll %[temp_reg5], %[temp_reg5], 2 \n\t"
yading@10 230 "sw %[temp_reg4], -8*4(%[ptr]) \n\t"
yading@10 231 "sw %[temp_reg5], 7*4(%[ptr]) \n\t"
yading@10 232
yading@10 233 : [tmp0] "=&r" (tmp0), [tmp1] "=&r" (tmp1), [tmp2] "=&r" (tmp2),
yading@10 234 [tmp00] "=&r" (tmp00), [tmp11] "=&r" (tmp11),
yading@10 235 [temp_reg1] "=&r" (temp_reg1), [temp_reg2] "=&r" (temp_reg2),
yading@10 236 [temp_reg3] "=&r" (temp_reg3), [temp_reg4] "=&r" (temp_reg4),
yading@10 237 [temp_reg5] "=&r" (temp_reg5), [temp_reg6] "=&r" (temp_reg6)
yading@10 238 : [csa] "r" (csa), [ptr] "r" (ptr),
yading@10 239 [MAX_lo] "r" (MAX_lo)
yading@10 240 : "memory", "hi", "lo", "$ac1hi", "$ac1lo", "$ac2hi", "$ac2lo",
yading@10 241 "$ac3hi", "$ac3lo"
yading@10 242 );
yading@10 243
yading@10 244 ptr += 18;
yading@10 245 }
yading@10 246 }
yading@10 247 #define compute_antialias compute_antialias_mips_fixed
yading@10 248 #endif /* HAVE_INLINE_ASM */
yading@10 249
yading@10 250 #endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H */