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   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
  59 static 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 */