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FFmpeg/libavcodec/mips/compute_antialias_fixed.h

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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. static void compute_antialias_mips_fixed(MPADecodeContext *s,

  59.                                         GranuleDef *g)

  60. {

  61.     int32_t *ptr, *csa;

  62.     int n, i;

  63.     int MAX_lo = 0xffffffff;

  64. 

  65.     /* we antialias only "long" bands */

  66.     if (g->block_type == 2) {

  67.         if (!g->switch_point)

  68.             return;

  69.         /* XXX: check this for 8000Hz case */

  70.         n = 1;

  71.     } else {

  72.         n = SBLIMIT - 1;

  73.     }

  74. 

  75. 

  76.     ptr = g->sb_hybrid + 18;

  77. 

  78.     for(i = n;i > 0;i--) {

  79.         int tmp0, tmp1, tmp2, tmp00, tmp11;

  80.         int temp_reg1, temp_reg2, temp_reg3, temp_reg4, temp_reg5, temp_reg6;

  81.         csa = &csa_table[0][0];

  82. 

  83.         /**

  84.          * instructions are scheduled to minimize pipeline stall.

  85.          */

  86.         __asm__ volatile (

  87.             "lw   %[tmp0],      -1*4(%[ptr])                            \n\t"

  88.             "lw   %[tmp1],      0*4(%[ptr])                             \n\t"

  89.             "lw   %[temp_reg1], 0*4(%[csa])                             \n\t"

  90.             "lw   %[temp_reg2], 2*4(%[csa])                             \n\t"

  91.             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"

  92.             "lw   %[temp_reg3], 3*4(%[csa])                             \n\t"

  93.             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"

  94.             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"

  95.             "lw   %[tmp00],     -2*4(%[ptr])                            \n\t"

  96.             "lw   %[tmp11],     1*4(%[ptr])                             \n\t"

  97.             "lw   %[temp_reg4], 4*4(%[csa])                             \n\t"

  98.             "mtlo %[MAX_lo],    $ac0                                    \n\t"

  99.             "mtlo $zero,        $ac1                                    \n\t"

  100.             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"

  101.             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"

  102.             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"

  103.             "lw   %[temp_reg5], 6*4(%[csa])                             \n\t"

  104.             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"

  105.             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"

  106.             "mfhi %[temp_reg1], $ac0                                    \n\t"

  107.             "mfhi %[temp_reg2], $ac1                                    \n\t"

  108.             "lw   %[temp_reg6], 7*4(%[csa])                             \n\t"

  109.             "mtlo %[MAX_lo],    $ac2                                    \n\t"

  110.             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"

  111.             "mtlo $zero,        $ac3                                    \n\t"

  112.             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"

  113.             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"

  114.             "sw   %[temp_reg1], -1*4(%[ptr])                            \n\t"

  115.             "mfhi %[temp_reg4], $ac2                                    \n\t"

  116.             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"

  117.             "mfhi %[temp_reg5], $ac3                                    \n\t"

  118.             "sw   %[temp_reg2], 0*4(%[ptr])                             \n\t"

  119.             "lw   %[tmp0],      -3*4(%[ptr])                            \n\t"

  120.             "lw   %[tmp1],      2*4(%[ptr])                             \n\t"

  121.             "lw   %[temp_reg1], 8*4(%[csa])                             \n\t"

  122.             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"

  123.             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"

  124.             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"

  125.             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"

  126.             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"

  127.             "sw   %[temp_reg4], -2*4(%[ptr])                            \n\t"

  128.             "sw   %[temp_reg5], 1*4(%[ptr])                             \n\t"

  129.             "lw   %[temp_reg2], 10*4(%[csa])                            \n\t"

  130.             "mtlo %[MAX_lo],    $ac0                                    \n\t"

  131.             "lw   %[temp_reg3], 11*4(%[csa])                            \n\t"

  132.             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"

  133.             "mtlo $zero,        $ac1                                    \n\t"

  134.             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"

  135.             "lw   %[tmp00],     -4*4(%[ptr])                            \n\t"

  136.             "lw   %[tmp11],     3*4(%[ptr])                             \n\t"

  137.             "mfhi %[temp_reg1], $ac0                                    \n\t"

  138.             "lw   %[temp_reg4], 12*4(%[csa])                            \n\t"

  139.             "mfhi %[temp_reg2], $ac1                                    \n\t"

  140.             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"

  141.             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"

  142.             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"

  143.             "lw   %[temp_reg5], 14*4(%[csa])                            \n\t"

  144.             "lw   %[temp_reg6], 15*4(%[csa])                            \n\t"

  145.             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"

  146.             "mtlo %[MAX_lo],    $ac2                                    \n\t"

  147.             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"

  148.             "mtlo $zero,        $ac3                                    \n\t"

  149.             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"

  150.             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"

  151.             "sw   %[temp_reg1], -3*4(%[ptr])                            \n\t"

  152.             "mfhi %[temp_reg4], $ac2                                    \n\t"

  153.             "sw   %[temp_reg2], 2*4(%[ptr])                             \n\t"

  154.             "mfhi %[temp_reg5], $ac3                                    \n\t"

  155.             "lw   %[tmp0],      -5*4(%[ptr])                            \n\t"

  156.             "lw   %[tmp1],      4*4(%[ptr])                             \n\t"

  157.             "lw   %[temp_reg1], 16*4(%[csa])                            \n\t"

  158.             "lw   %[temp_reg2], 18*4(%[csa])                            \n\t"

  159.             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"

  160.             "lw   %[temp_reg3], 19*4(%[csa])                            \n\t"

  161.             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"

  162.             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"

  163.             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"

  164.             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"

  165.             "sw   %[temp_reg4], -4*4(%[ptr])                            \n\t"

  166.             "mtlo %[MAX_lo],    $ac0                                    \n\t"

  167.             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"

  168.             "mtlo $zero,        $ac1                                    \n\t"

  169.             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"

  170.             "sw   %[temp_reg5], 3*4(%[ptr])                             \n\t"

  171.             "lw   %[tmp00],     -6*4(%[ptr])                            \n\t"

  172.             "mfhi %[temp_reg1], $ac0                                    \n\t"

  173.             "lw   %[tmp11],     5*4(%[ptr])                             \n\t"

  174.             "mfhi %[temp_reg2], $ac1                                    \n\t"

  175.             "lw   %[temp_reg4], 20*4(%[csa])                            \n\t"

  176.             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"

  177.             "lw   %[temp_reg5], 22*4(%[csa])                            \n\t"

  178.             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"

  179.             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"

  180.             "lw   %[temp_reg6], 23*4(%[csa])                            \n\t"

  181.             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"

  182.             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"

  183.             "mtlo %[MAX_lo],    $ac2                                    \n\t"

  184.             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"

  185.             "mtlo $zero,        $ac3                                    \n\t"

  186.             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"

  187.             "sw   %[temp_reg1], -5*4(%[ptr])                            \n\t"

  188.             "sw   %[temp_reg2], 4*4(%[ptr])                             \n\t"

  189.             "mfhi %[temp_reg4], $ac2                                    \n\t"

  190.             "lw   %[tmp0],      -7*4(%[ptr])                            \n\t"

  191.             "mfhi %[temp_reg5], $ac3                                    \n\t"

  192.             "lw   %[tmp1],      6*4(%[ptr])                             \n\t"

  193.             "lw   %[temp_reg1], 24*4(%[csa])                            \n\t"

  194.             "lw   %[temp_reg2], 26*4(%[csa])                            \n\t"

  195.             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"

  196.             "lw   %[temp_reg3], 27*4(%[csa])                            \n\t"

  197.             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"

  198.             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"

  199.             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"

  200.             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"

  201.             "sw   %[temp_reg4], -6*4(%[ptr])                            \n\t"

  202.             "mtlo %[MAX_lo],    $ac0                                    \n\t"

  203.             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"

  204.             "mtlo $zero,        $ac1                                    \n\t"

  205.             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"

  206.             "sw   %[temp_reg5], 5*4(%[ptr])                             \n\t"

  207.             "lw   %[tmp00],     -8*4(%[ptr])                            \n\t"

  208.             "mfhi %[temp_reg1], $ac0                                    \n\t"

  209.             "lw   %[tmp11],     7*4(%[ptr])                             \n\t"

  210.             "mfhi %[temp_reg2], $ac1                                    \n\t"

  211.             "lw   %[temp_reg4], 28*4(%[csa])                            \n\t"

  212.             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"

  213.             "lw   %[temp_reg5], 30*4(%[csa])                            \n\t"

  214.             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"

  215.             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"

  216.             "lw   %[temp_reg6], 31*4(%[csa])                            \n\t"

  217.             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"

  218.             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"

  219.             "mtlo %[MAX_lo],    $ac2                                    \n\t"

  220.             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"

  221.             "mtlo $zero,        $ac3                                    \n\t"

  222.             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"

  223.             "sw   %[temp_reg1], -7*4(%[ptr])                            \n\t"

  224.             "sw   %[temp_reg2], 6*4(%[ptr])                             \n\t"

  225.             "mfhi %[temp_reg4], $ac2                                    \n\t"

  226.             "mfhi %[temp_reg5], $ac3                                    \n\t"

  227.             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"

  228.             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"

  229.             "sw   %[temp_reg4], -8*4(%[ptr])                            \n\t"

  230.             "sw   %[temp_reg5], 7*4(%[ptr])                             \n\t"

  231. 

  232.             : [tmp0] "=&r" (tmp0), [tmp1] "=&r" (tmp1), [tmp2] "=&r" (tmp2),

  233.               [tmp00] "=&r" (tmp00), [tmp11] "=&r" (tmp11),

  234.               [temp_reg1] "=&r" (temp_reg1), [temp_reg2] "=&r" (temp_reg2),

  235.               [temp_reg3] "=&r" (temp_reg3), [temp_reg4] "=&r" (temp_reg4),

  236.               [temp_reg5] "=&r" (temp_reg5), [temp_reg6] "=&r" (temp_reg6)

  237.             : [csa] "r" (csa), [ptr] "r" (ptr),

  238.               [MAX_lo] "r" (MAX_lo)

  239.          );

  240. 

  241.         ptr += 18;

  242.     }

  243. }

  244. #define compute_antialias compute_antialias_mips_fixed

  245. 

  246. #endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H */