git.sesse.net Git - ffmpeg/blob - libavcodec/mips/mpegaudiodsp_mips_fixed.c

   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  * MPEG Audio decoder optimized 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/mpegaudiodsp_template.c
  53  */
  54
  55 #include <string.h>
  56
  57 #include "libavutil/mips/asmdefs.h"
  58 #include "libavcodec/mpegaudiodsp.h"
  59
  60 #if HAVE_INLINE_ASM
  61 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
  62
  63 static void ff_mpadsp_apply_window_mips_fixed(int32_t *synth_buf, int32_t *window,
  64                                int *dither_state, int16_t *samples, ptrdiff_t incr)
  65 {
  66     register const int32_t *w, *w2, *p;
  67     int j;
  68     int16_t *samples2;
  69     int w_asm, p_asm, w_asm1, p_asm1, w_asm2, p_asm2;
  70     int w2_asm, w2_asm1, *p_temp1, *p_temp2;
  71     int sum1 = 0;
  72     int const min_asm = -32768, max_asm = 32767;
  73     int temp1, temp2 = 0, temp3 = 0;
  74     int64_t sum;
  75
  76     /* copy to avoid wrap */
  77     memcpy(synth_buf + 512, synth_buf, 32 * sizeof(*synth_buf));
  78     samples2 = samples + 31 * incr;
  79     w = window;
  80     w2 = window + 31;
  81     sum = *dither_state;
  82     p = synth_buf + 16;
  83     p_temp1 = synth_buf + 16;
  84     p_temp2 = synth_buf + 48;
  85     temp1 = sum;
  86
  87     /**
  88     * use of round_sample function from the original code is eliminated,
  89     * changed with appropriate assembly instructions.
  90     */
  91     __asm__ volatile (
  92          "mthi   $zero                                                    \n\t"
  93          "mtlo   %[temp1]                                                 \n\t"
  94          "lw     %[w_asm],  0(%[w])                                       \n\t"
  95          "lw     %[p_asm],  0(%[p])                                       \n\t"
  96          "lw     %[w_asm1], 64*4(%[w])                                    \n\t"
  97          "lw     %[p_asm1], 64*4(%[p])                                    \n\t"
  98          "lw     %[w_asm2], 128*4(%[w])                                   \n\t"
  99          "lw     %[p_asm2], 128*4(%[p])                                   \n\t"
 100          "madd   %[w_asm],  %[p_asm]                                      \n\t"
 101          "madd   %[w_asm1], %[p_asm1]                                     \n\t"
 102          "madd   %[w_asm2], %[p_asm2]                                     \n\t"
 103          "lw     %[w_asm],  192*4(%[w])                                   \n\t"
 104          "lw     %[p_asm],  192*4(%[p])                                   \n\t"
 105          "lw     %[w_asm1], 256*4(%[w])                                   \n\t"
 106          "lw     %[p_asm1], 256*4(%[p])                                   \n\t"
 107          "lw     %[w_asm2], 320*4(%[w])                                   \n\t"
 108          "lw     %[p_asm2], 320*4(%[p])                                   \n\t"
 109          "madd   %[w_asm],  %[p_asm]                                      \n\t"
 110          "madd   %[w_asm1], %[p_asm1]                                     \n\t"
 111          "madd   %[w_asm2], %[p_asm2]                                     \n\t"
 112          "lw     %[w_asm],  384*4(%[w])                                   \n\t"
 113          "lw     %[p_asm],  384*4(%[p])                                   \n\t"
 114          "lw     %[w_asm1], 448*4(%[w])                                   \n\t"
 115          "lw     %[p_asm1], 448*4(%[p])                                   \n\t"
 116          "lw     %[w_asm2], 32*4(%[w])                                    \n\t"
 117          "lw     %[p_asm2], 32*4(%[p])                                    \n\t"
 118          "madd   %[w_asm],  %[p_asm]                                      \n\t"
 119          "madd   %[w_asm1], %[p_asm1]                                     \n\t"
 120          "msub   %[w_asm2], %[p_asm2]                                     \n\t"
 121          "lw     %[w_asm],  96*4(%[w])                                    \n\t"
 122          "lw     %[p_asm],  96*4(%[p])                                    \n\t"
 123          "lw     %[w_asm1], 160*4(%[w])                                   \n\t"
 124          "lw     %[p_asm1], 160*4(%[p])                                   \n\t"
 125          "lw     %[w_asm2], 224*4(%[w])                                   \n\t"
 126          "lw     %[p_asm2], 224*4(%[p])                                   \n\t"
 127          "msub   %[w_asm],  %[p_asm]                                      \n\t"
 128          "msub   %[w_asm1], %[p_asm1]                                     \n\t"
 129          "msub   %[w_asm2], %[p_asm2]                                     \n\t"
 130          "lw     %[w_asm],  288*4(%[w])                                   \n\t"
 131          "lw     %[p_asm],  288*4(%[p])                                   \n\t"
 132          "lw     %[w_asm1], 352*4(%[w])                                   \n\t"
 133          "lw     %[p_asm1], 352*4(%[p])                                   \n\t"
 134          "msub   %[w_asm],  %[p_asm]                                      \n\t"
 135          "lw     %[w_asm],  480*4(%[w])                                   \n\t"
 136          "lw     %[p_asm],  480*4(%[p])                                   \n\t"
 137          "lw     %[w_asm2], 416*4(%[w])                                   \n\t"
 138          "lw     %[p_asm2], 416*4(%[p])                                   \n\t"
 139          "msub   %[w_asm],  %[p_asm]                                      \n\t"
 140          "msub   %[w_asm1], %[p_asm1]                                     \n\t"
 141          "msub   %[w_asm2], %[p_asm2]                                     \n\t"
 142
 143          /*round_sample function from the original code is eliminated,
 144           * changed with appropriate assembly instructions
 145           * code example:
 146
 147          "extr.w  %[sum1],$ac0,24                                       \n\t"
 148          "mflo %[temp3],  $ac0                                          \n\t"
 149          "and  %[temp1],  %[temp3],  0x00ffffff                         \n\t"
 150          "slt  %[temp2],  %[sum1],   %[min_asm]                         \n\t"
 151          "movn %[sum1],   %[min_asm],%[temp2]                           \n\t"
 152          "slt  %[temp2],  %[max_asm],%[sum1]                            \n\t"
 153          "movn %[sum1],   %[max_asm],%[temp2]                           \n\t"
 154          "sh   %[sum1],   0(%[samples])                                 \n\t"
 155          */
 156
 157          "extr.w %[sum1],   $ac0,       24                                \n\t"
 158          "mflo   %[temp3]                                                 \n\t"
 159          PTR_ADDIU "%[w],   %[w],       4                                 \n\t"
 160          "and    %[temp1],  %[temp3],   0x00ffffff                        \n\t"
 161          "slt    %[temp2],  %[sum1],    %[min_asm]                        \n\t"
 162          "movn   %[sum1],   %[min_asm], %[temp2]                          \n\t"
 163          "slt    %[temp2],  %[max_asm], %[sum1]                           \n\t"
 164          "movn   %[sum1],   %[max_asm], %[temp2]                          \n\t"
 165          "sh     %[sum1],   0(%[samples])                                 \n\t"
 166
 167         : [w_asm] "=&r" (w_asm), [p_asm] "=&r" (p_asm), [w_asm1] "=&r" (w_asm1),
 168           [p_asm1] "=&r" (p_asm1), [temp1] "+r" (temp1), [temp2] "+r" (temp2),
 169           [w_asm2] "=&r" (w_asm2), [p_asm2] "=&r" (p_asm2),
 170           [sum1] "+r" (sum1), [w] "+r" (w), [temp3] "+r" (temp3)
 171         : [p] "r" (p), [samples] "r" (samples), [min_asm] "r" (min_asm),
 172           [max_asm] "r" (max_asm)
 173         : "memory", "hi","lo"
 174      );
 175
 176      samples += incr;
 177
 178     /* we calculate two samples at the same time to avoid one memory
 179        access per two sample */
 180
 181     for(j = 1; j < 16; j++) {
 182         __asm__ volatile (
 183              "mthi   $0,         $ac1                                      \n\t"
 184              "mtlo   $0,         $ac1                                      \n\t"
 185              "mthi   $0                                                    \n\t"
 186              "mtlo   %[temp1]                                              \n\t"
 187              PTR_ADDIU "%[p_temp1], %[p_temp1],    4                       \n\t"
 188              "lw     %[w_asm],   0(%[w])                                   \n\t"
 189              "lw     %[p_asm],   0(%[p_temp1])                             \n\t"
 190              "lw     %[w2_asm],  0(%[w2])                                  \n\t"
 191              "lw     %[w_asm1],  64*4(%[w])                                \n\t"
 192              "lw     %[p_asm1],  64*4(%[p_temp1])                          \n\t"
 193              "lw     %[w2_asm1], 64*4(%[w2])                               \n\t"
 194              "madd   %[w_asm],   %[p_asm]                                  \n\t"
 195              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 196              "madd   %[w_asm1],  %[p_asm1]                                 \n\t"
 197              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 198              "lw     %[w_asm],   128*4(%[w])                               \n\t"
 199              "lw     %[p_asm],   128*4(%[p_temp1])                         \n\t"
 200              "lw     %[w2_asm],  128*4(%[w2])                              \n\t"
 201              "lw     %[w_asm1],  192*4(%[w])                               \n\t"
 202              "lw     %[p_asm1],  192*4(%[p_temp1])                         \n\t"
 203              "lw     %[w2_asm1], 192*4(%[w2])                              \n\t"
 204              "madd   %[w_asm],   %[p_asm]                                  \n\t"
 205              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 206              "madd   %[w_asm1],  %[p_asm1]                                 \n\t"
 207              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 208              "lw     %[w_asm],   256*4(%[w])                               \n\t"
 209              "lw     %[p_asm],   256*4(%[p_temp1])                         \n\t"
 210              "lw     %[w2_asm],  256*4(%[w2])                              \n\t"
 211              "lw     %[w_asm1],  320*4(%[w])                               \n\t"
 212              "lw     %[p_asm1],  320*4(%[p_temp1])                         \n\t"
 213              "lw     %[w2_asm1], 320*4(%[w2])                              \n\t"
 214              "madd   %[w_asm],   %[p_asm]                                  \n\t"
 215              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 216              "madd   %[w_asm1],  %[p_asm1]                                 \n\t"
 217              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 218              "lw     %[w_asm],   384*4(%[w])                               \n\t"
 219              "lw     %[p_asm],   384*4(%[p_temp1])                         \n\t"
 220              "lw     %[w2_asm],  384*4(%[w2])                              \n\t"
 221              "lw     %[w_asm1],  448*4(%[w])                               \n\t"
 222              "lw     %[p_asm1],  448*4(%[p_temp1])                         \n\t"
 223              "lw     %[w2_asm1], 448*4(%[w2])                              \n\t"
 224              "madd   %[w_asm],   %[p_asm]                                  \n\t"
 225              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 226              "madd   %[w_asm1],  %[p_asm1]                                 \n\t"
 227              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 228              PTR_ADDIU "%[p_temp2], %[p_temp2],   -4                      \n\t"
 229              "lw     %[w_asm],   32*4(%[w])                                \n\t"
 230              "lw     %[p_asm],   0(%[p_temp2])                             \n\t"
 231              "lw     %[w2_asm],  32*4(%[w2])                               \n\t"
 232              "lw     %[w_asm1],  96*4(%[w])                                \n\t"
 233              "lw     %[p_asm1],  64*4(%[p_temp2])                          \n\t"
 234              "lw     %[w2_asm1], 96*4(%[w2])                               \n\t"
 235              "msub   %[w_asm],   %[p_asm]                                  \n\t"
 236              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 237              "msub   %[w_asm1],  %[p_asm1]                                 \n\t"
 238              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 239              "lw     %[w_asm],   160*4(%[w])                               \n\t"
 240              "lw     %[p_asm],   128*4(%[p_temp2])                         \n\t"
 241              "lw     %[w2_asm],  160*4(%[w2])                              \n\t"
 242              "lw     %[w_asm1],  224*4(%[w])                               \n\t"
 243              "lw     %[p_asm1],  192*4(%[p_temp2])                         \n\t"
 244              "lw     %[w2_asm1], 224*4(%[w2])                              \n\t"
 245              "msub   %[w_asm],   %[p_asm]                                  \n\t"
 246              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 247              "msub   %[w_asm1],  %[p_asm1]                                 \n\t"
 248              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 249              "lw     %[w_asm],   288*4(%[w])                               \n\t"
 250              "lw     %[p_asm],   256*4(%[p_temp2])                         \n\t"
 251              "lw     %[w2_asm],  288*4(%[w2])                              \n\t"
 252              "lw     %[w_asm1],  352*4(%[w])                               \n\t"
 253              "lw     %[p_asm1],  320*4(%[p_temp2])                         \n\t"
 254              "lw     %[w2_asm1], 352*4(%[w2])                              \n\t"
 255              "msub   %[w_asm],   %[p_asm]                                  \n\t"
 256              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 257              "msub   %[w_asm1],  %[p_asm1]                                 \n\t"
 258              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 259              "lw     %[w_asm],   416*4(%[w])                               \n\t"
 260              "lw     %[p_asm],   384*4(%[p_temp2])                         \n\t"
 261              "lw     %[w2_asm],  416*4(%[w2])                              \n\t"
 262              "lw     %[w_asm1],  480*4(%[w])                               \n\t"
 263              "lw     %[p_asm1],  448*4(%[p_temp2])                         \n\t"
 264              "lw     %[w2_asm1], 480*4(%[w2])                              \n\t"
 265              "msub   %[w_asm],   %[p_asm]                                  \n\t"
 266              "msub   %[w_asm1],  %[p_asm1]                                 \n\t"
 267              "msub   $ac1,       %[w2_asm],        %[p_asm]                \n\t"
 268              "msub   $ac1,       %[w2_asm1],       %[p_asm1]               \n\t"
 269              PTR_ADDIU "%[w],    %[w],             4                       \n\t"
 270              PTR_ADDIU "%[w2],   %[w2],            -4                      \n\t"
 271              "mflo   %[temp2]                                              \n\t"
 272              "extr.w %[sum1],    $ac0,             24                      \n\t"
 273              "li     %[temp3],   1                                         \n\t"
 274              "and    %[temp1],   %[temp2],         0x00ffffff              \n\t"
 275              "madd   $ac1,       %[temp1],         %[temp3]                \n\t"
 276              "slt    %[temp2],   %[sum1],          %[min_asm]              \n\t"
 277              "movn   %[sum1],    %[min_asm],       %[temp2]                \n\t"
 278              "slt    %[temp2],   %[max_asm],       %[sum1]                 \n\t"
 279              "movn   %[sum1],    %[max_asm],       %[temp2]                \n\t"
 280              "sh     %[sum1],    0(%[samples])                             \n\t"
 281              "mflo   %[temp3],   $ac1                                      \n\t"
 282              "extr.w %[sum1],    $ac1,             24                      \n\t"
 283              "and    %[temp1],   %[temp3],         0x00ffffff              \n\t"
 284              "slt    %[temp2],   %[sum1],          %[min_asm]              \n\t"
 285              "movn   %[sum1],    %[min_asm],       %[temp2]                \n\t"
 286              "slt    %[temp2],   %[max_asm],       %[sum1]                 \n\t"
 287              "movn   %[sum1],    %[max_asm],       %[temp2]                \n\t"
 288              "sh     %[sum1],    0(%[samples2])                            \n\t"
 289
 290             : [w_asm] "=&r" (w_asm), [p_asm] "=&r" (p_asm), [w_asm1] "=&r" (w_asm1),
 291               [p_asm1] "=&r" (p_asm1), [w2_asm1] "=&r" (w2_asm1),
 292               [w2_asm] "=&r" (w2_asm), [temp1] "+r" (temp1), [temp2] "+r" (temp2),
 293               [p_temp1] "+r" (p_temp1), [p_temp2] "+r" (p_temp2), [sum1] "+r" (sum1),
 294               [w] "+r" (w), [w2] "+r" (w2), [samples] "+r" (samples),
 295               [samples2] "+r" (samples2), [temp3] "+r" (temp3)
 296             : [min_asm] "r" (min_asm), [max_asm] "r" (max_asm)
 297             : "memory", "hi", "lo", "$ac1hi", "$ac1lo"
 298         );
 299
 300         samples += incr;
 301         samples2 -= incr;
 302     }
 303
 304     p = synth_buf + 32;
 305
 306     __asm__ volatile (
 307         "mthi   $0                                                        \n\t"
 308         "mtlo   %[temp1]                                                  \n\t"
 309         "lw     %[w_asm],  32*4(%[w])                                     \n\t"
 310         "lw     %[p_asm],  0(%[p])                                        \n\t"
 311         "lw     %[w_asm1], 96*4(%[w])                                     \n\t"
 312         "lw     %[p_asm1], 64*4(%[p])                                     \n\t"
 313         "lw     %[w_asm2], 160*4(%[w])                                    \n\t"
 314         "lw     %[p_asm2], 128*4(%[p])                                    \n\t"
 315         "msub   %[w_asm],  %[p_asm]                                       \n\t"
 316         "msub   %[w_asm1], %[p_asm1]                                      \n\t"
 317         "msub   %[w_asm2], %[p_asm2]                                      \n\t"
 318         "lw     %[w_asm],  224*4(%[w])                                    \n\t"
 319         "lw     %[p_asm],  192*4(%[p])                                    \n\t"
 320         "lw     %[w_asm1], 288*4(%[w])                                    \n\t"
 321         "lw     %[p_asm1], 256*4(%[p])                                    \n\t"
 322         "lw     %[w_asm2], 352*4(%[w])                                    \n\t"
 323         "lw     %[p_asm2], 320*4(%[p])                                    \n\t"
 324         "msub   %[w_asm],  %[p_asm]                                       \n\t"
 325         "msub   %[w_asm1], %[p_asm1]                                      \n\t"
 326         "msub   %[w_asm2], %[p_asm2]                                      \n\t"
 327         "lw     %[w_asm],  416*4(%[w])                                    \n\t"
 328         "lw     %[p_asm],  384*4(%[p])                                    \n\t"
 329         "lw     %[w_asm1], 480*4(%[w])                                    \n\t"
 330         "lw     %[p_asm1], 448*4(%[p])                                    \n\t"
 331         "msub   %[w_asm],  %[p_asm]                                       \n\t"
 332         "msub   %[w_asm1], %[p_asm1]                                      \n\t"
 333         "extr.w %[sum1],   $ac0,       24                                 \n\t"
 334         "mflo   %[temp2]                                                  \n\t"
 335         "and    %[temp1],  %[temp2],   0x00ffffff                         \n\t"
 336         "slt    %[temp2],  %[sum1],    %[min_asm]                         \n\t"
 337         "movn   %[sum1],   %[min_asm], %[temp2]                           \n\t"
 338         "slt    %[temp2],  %[max_asm], %[sum1]                            \n\t"
 339         "movn   %[sum1],   %[max_asm], %[temp2]                           \n\t"
 340         "sh     %[sum1],   0(%[samples])                                  \n\t"
 341
 342         : [w_asm] "=&r" (w_asm), [p_asm] "=&r" (p_asm), [w_asm1] "=&r" (w_asm1),
 343           [p_asm1] "=&r" (p_asm1), [temp1] "+r" (temp1), [temp2] "+r" (temp2),
 344           [w_asm2] "=&r" (w_asm2), [p_asm2] "=&r" (p_asm2), [sum1] "+r" (sum1)
 345         : [w] "r" (w), [p] "r" (p), [samples] "r" (samples), [min_asm] "r" (min_asm),
 346           [max_asm] "r" (max_asm)
 347         : "memory", "hi", "lo", "$ac1hi", "$ac1lo"
 348      );
 349
 350     *dither_state= temp1;
 351 }
 352
 353 static void imdct36_mips_fixed(int *out, int *buf, int *in, int *win)
 354 {
 355     int j;
 356     int t0, t1, t2, t3, s0, s1, s2, s3;
 357     int tmp[18], *tmp1, *in1;
 358     /* temporary variables */
 359     int temp_reg1, temp_reg2, temp_reg3, temp_reg4, temp_reg5, temp_reg6;
 360     int t4, t5, t6, t8, t7;
 361
 362    /* values defined in macros and tables are
 363     * eliminated - they are directly loaded in appropriate variables
 364     */
 365     int const C_1  =  4229717092; /* cos(pi*1/18)*2  */
 366     int const C_2  =  4035949074; /* cos(pi*2/18)*2  */
 367     int const C_3  =  575416510;  /* -cos(pi*3/18)*2 */
 368     int const C_3A =  3719550786; /* cos(pi*3/18)*2  */
 369     int const C_4  =  1004831466; /* -cos(pi*4/18)*2 */
 370     int const C_5  =  1534215534; /* -cos(pi*5/18)*2 */
 371     int const C_7  = -1468965330; /* -cos(pi*7/18)*2 */
 372     int const C_8  = -745813244;  /* -cos(pi*8/18)*2 */
 373
 374    /*
 375     * instructions of the first two loops are reorganized and loops are unrolled,
 376     * in order to eliminate unnecessary readings and writings in array
 377     */
 378
 379     __asm__ volatile (
 380         "lw   %[t1], 17*4(%[in])                                         \n\t"
 381         "lw   %[t2], 16*4(%[in])                                         \n\t"
 382         "lw   %[t3], 15*4(%[in])                                         \n\t"
 383         "lw   %[t4], 14*4(%[in])                                         \n\t"
 384         "addu %[t1], %[t1],      %[t2]                                   \n\t"
 385         "addu %[t2], %[t2],      %[t3]                                   \n\t"
 386         "addu %[t3], %[t3],      %[t4]                                   \n\t"
 387         "lw   %[t5], 13*4(%[in])                                         \n\t"
 388         "addu %[t1], %[t1],      %[t3]                                   \n\t"
 389         "sw   %[t2], 16*4(%[in])                                         \n\t"
 390         "lw   %[t6], 12*4(%[in])                                         \n\t"
 391         "sw   %[t1], 17*4(%[in])                                         \n\t"
 392         "addu %[t4], %[t4],      %[t5]                                   \n\t"
 393         "addu %[t5], %[t5],      %[t6]                                   \n\t"
 394         "lw   %[t7], 11*4(%[in])                                         \n\t"
 395         "addu %[t3], %[t3],      %[t5]                                   \n\t"
 396         "sw   %[t4], 14*4(%[in])                                         \n\t"
 397         "lw   %[t8], 10*4(%[in])                                         \n\t"
 398         "sw   %[t3], 15*4(%[in])                                         \n\t"
 399         "addu %[t6], %[t6],      %[t7]                                   \n\t"
 400         "addu %[t7], %[t7],      %[t8]                                   \n\t"
 401         "sw   %[t6], 12*4(%[in])                                         \n\t"
 402         "addu %[t5], %[t5],      %[t7]                                   \n\t"
 403         "lw   %[t1], 9*4(%[in])                                          \n\t"
 404         "lw   %[t2], 8*4(%[in])                                          \n\t"
 405         "sw   %[t5], 13*4(%[in])                                         \n\t"
 406         "addu %[t8], %[t8],      %[t1]                                   \n\t"
 407         "addu %[t1], %[t1],      %[t2]                                   \n\t"
 408         "sw   %[t8], 10*4(%[in])                                         \n\t"
 409         "addu %[t7], %[t7],      %[t1]                                   \n\t"
 410         "lw   %[t3], 7*4(%[in])                                          \n\t"
 411         "lw   %[t4], 6*4(%[in])                                          \n\t"
 412         "sw   %[t7], 11*4(%[in])                                         \n\t"
 413         "addu %[t2], %[t2],      %[t3]                                   \n\t"
 414         "addu %[t3], %[t3],      %[t4]                                   \n\t"
 415         "sw   %[t2], 8*4(%[in])                                          \n\t"
 416         "addu %[t1], %[t1],      %[t3]                                   \n\t"
 417         "lw   %[t5], 5*4(%[in])                                          \n\t"
 418         "lw   %[t6], 4*4(%[in])                                          \n\t"
 419         "sw   %[t1], 9*4(%[in])                                          \n\t"
 420         "addu %[t4], %[t4],      %[t5]                                   \n\t"
 421         "addu %[t5], %[t5],      %[t6]                                   \n\t"
 422         "sw   %[t4], 6*4(%[in])                                          \n\t"
 423         "addu %[t3], %[t3],      %[t5]                                   \n\t"
 424         "lw   %[t7], 3*4(%[in])                                          \n\t"
 425         "lw   %[t8], 2*4(%[in])                                          \n\t"
 426         "sw   %[t3], 7*4(%[in])                                          \n\t"
 427         "addu %[t6], %[t6],      %[t7]                                   \n\t"
 428         "addu %[t7], %[t7],      %[t8]                                   \n\t"
 429         "sw   %[t6], 4*4(%[in])                                          \n\t"
 430         "addu %[t5], %[t5],      %[t7]                                   \n\t"
 431         "lw   %[t1], 1*4(%[in])                                          \n\t"
 432         "lw   %[t2], 0*4(%[in])                                          \n\t"
 433         "sw   %[t5], 5*4(%[in])                                          \n\t"
 434         "addu %[t8], %[t8],      %[t1]                                   \n\t"
 435         "addu %[t1], %[t1],      %[t2]                                   \n\t"
 436         "sw   %[t8], 2*4(%[in])                                          \n\t"
 437         "addu %[t7], %[t7],      %[t1]                                   \n\t"
 438         "sw   %[t7], 3*4(%[in])                                          \n\t"
 439         "sw   %[t1], 1*4(%[in])                                          \n\t"
 440
 441         : [in] "+r" (in), [t1] "=&r" (t1), [t2] "=&r" (t2), [t3] "=&r" (t3),
 442           [t4] "=&r" (t4), [t5] "=&r" (t5), [t6] "=&r" (t6),
 443           [t7] "=&r" (t7), [t8] "=&r" (t8)
 444         :
 445         : "memory"
 446     );
 447
 448     for(j = 0; j < 2; j++) {
 449
 450         tmp1 = tmp + j;
 451         in1 = in + j;
 452
 453          /**
 454          *  Original constants are multiplied by two in advanced
 455          *  for assembly optimization (e.g. C_2 = 2 * C2).
 456          *  That can lead to overflow in operations where they are used.
 457          *
 458          *  Example of the solution:
 459          *
 460          *  in original code:
 461          *  t0 = ((int64_t)(in1[2*2] + in1[2*4]) * (int64_t)(2*C2))>>32
 462          *
 463          *  in assembly:
 464          *  C_2 = 2 * C2;
 465          *   .
 466          *   .
 467          *  "lw   %[t7],       4*4(%[in1])                               \n\t"
 468          *  "lw   %[t8],       8*4(%[in1])                               \n\t"
 469          *  "addu %[temp_reg2],%[t7],       %[t8]                        \n\t"
 470          *  "multu %[C_2],     %[temp_reg2]                              \n\t"
 471          *  "mfhi %[temp_reg1]                                           \n\t"
 472          *  "sra  %[temp_reg2],%[temp_reg2],31                           \n\t"
 473          *  "move %[t0],       $0                                        \n\t"
 474          *  "movn %[t0],       %[C_2],      %[temp_reg2]                 \n\t"
 475          *  "sub  %[t0],       %[temp_reg1],%[t0]                        \n\t"
 476          */
 477
 478         __asm__ volatile (
 479             "lw    %[t7],        4*4(%[in1])                               \n\t"
 480             "lw    %[t8],        8*4(%[in1])                               \n\t"
 481             "lw    %[t6],        16*4(%[in1])                              \n\t"
 482             "lw    %[t4],        0*4(%[in1])                               \n\t"
 483             "addu  %[temp_reg2], %[t7],        %[t8]                       \n\t"
 484             "addu  %[t2],        %[t6],        %[t8]                       \n\t"
 485             "multu %[C_2],       %[temp_reg2]                              \n\t"
 486             "lw    %[t5],        12*4(%[in1])                              \n\t"
 487             "sub   %[t2],        %[t2],        %[t7]                       \n\t"
 488             "sub   %[t1],        %[t4],        %[t5]                       \n\t"
 489             "sra   %[t3],        %[t5],        1                           \n\t"
 490             "sra   %[temp_reg1], %[t2],        1                           \n\t"
 491             "addu  %[t3],        %[t3],        %[t4]                       \n\t"
 492             "sub   %[temp_reg1], %[t1],        %[temp_reg1]                \n\t"
 493             "sra   %[temp_reg2], %[temp_reg2], 31                          \n\t"
 494             "sw    %[temp_reg1], 6*4(%[tmp1])                              \n\t"
 495             "move  %[t0],        $0                                        \n\t"
 496             "movn  %[t0],        %[C_2],       %[temp_reg2]                \n\t"
 497             "mfhi  %[temp_reg1]                                            \n\t"
 498             "addu  %[t1],        %[t1],        %[t2]                       \n\t"
 499             "sw    %[t1],        16*4(%[tmp1])                             \n\t"
 500             "sub   %[temp_reg4], %[t8],        %[t6]                       \n\t"
 501             "add   %[temp_reg2], %[t7],        %[t6]                       \n\t"
 502             "mult  $ac1,         %[C_8],       %[temp_reg4]                \n\t"
 503             "multu $ac2,         %[C_4],       %[temp_reg2]                \n\t"
 504             "sub   %[t0],        %[temp_reg1], %[t0]                       \n\t"
 505             "sra   %[temp_reg1], %[temp_reg2], 31                          \n\t"
 506             "move  %[t2],        $0                                        \n\t"
 507             "movn  %[t2],        %[C_4],       %[temp_reg1]                \n\t"
 508             "mfhi  %[t1],        $ac1                                      \n\t"
 509             "mfhi  %[temp_reg1], $ac2                                      \n\t"
 510             "lw    %[t6],        10*4(%[in1])                              \n\t"
 511             "lw    %[t8],        14*4(%[in1])                              \n\t"
 512             "lw    %[t7],        2*4(%[in1])                               \n\t"
 513             "lw    %[t4],        6*4(%[in1])                               \n\t"
 514             "sub   %[temp_reg3], %[t3],        %[t0]                       \n\t"
 515             "add   %[temp_reg4], %[t3],        %[t0]                       \n\t"
 516             "sub   %[temp_reg1], %[temp_reg1], %[temp_reg2]                \n\t"
 517             "add   %[temp_reg4], %[temp_reg4], %[t1]                       \n\t"
 518             "sub   %[t2],        %[temp_reg1], %[t2]                       \n\t"
 519             "sw    %[temp_reg4], 2*4(%[tmp1])                              \n\t"
 520             "sub   %[temp_reg3], %[temp_reg3], %[t2]                       \n\t"
 521             "add   %[temp_reg1], %[t3],        %[t2]                       \n\t"
 522             "sw    %[temp_reg3], 10*4(%[tmp1])                             \n\t"
 523             "sub   %[temp_reg1], %[temp_reg1], %[t1]                       \n\t"
 524             "addu  %[temp_reg2], %[t6],        %[t8]                       \n\t"
 525             "sw    %[temp_reg1], 14*4(%[tmp1])                             \n\t"
 526             "sub   %[temp_reg2], %[temp_reg2], %[t7]                       \n\t"
 527             "addu  %[temp_reg3], %[t7],        %[t6]                       \n\t"
 528             "multu $ac3,         %[C_3],       %[temp_reg2]                \n\t"
 529             "multu %[C_1],       %[temp_reg3]                              \n\t"
 530             "sra   %[temp_reg1], %[temp_reg2], 31                          \n\t"
 531             "move  %[t1],        $0                                        \n\t"
 532             "sra   %[temp_reg3], %[temp_reg3], 31                          \n\t"
 533             "movn  %[t1],        %[C_3],       %[temp_reg1]                \n\t"
 534             "mfhi  %[temp_reg1], $ac3                                      \n\t"
 535             "mfhi  %[temp_reg4]                                            \n\t"
 536             "move  %[t2],        $0                                        \n\t"
 537             "movn  %[t2],        %[C_1],       %[temp_reg3]                \n\t"
 538             "sub   %[temp_reg3], %[t6],        %[t8]                       \n\t"
 539             "sub   %[t2],        %[temp_reg4], %[t2]                       \n\t"
 540             "multu $ac1,         %[C_7],       %[temp_reg3]                \n\t"
 541             "sub   %[temp_reg1], %[temp_reg1], %[temp_reg2]                \n\t"
 542             "sra   %[temp_reg4], %[temp_reg3], 31                          \n\t"
 543             "sub   %[t1],        %[temp_reg1], %[t1]                       \n\t"
 544             "move  %[t3],        $0                                        \n\t"
 545             "sw    %[t1],        4*4(%[tmp1])                              \n\t"
 546             "movn  %[t3],        %[C_7],       %[temp_reg4]                \n\t"
 547             "multu $ac2,         %[C_3A],      %[t4]                       \n\t"
 548             "add   %[temp_reg2], %[t7],        %[t8]                       \n\t"
 549             "move  %[t1],        $0                                        \n\t"
 550             "mfhi  %[temp_reg4], $ac1                                      \n\t"
 551             "multu $ac3,%[C_5],  %[temp_reg2]                              \n\t"
 552             "move  %[t0],        $0                                        \n\t"
 553             "sra   %[temp_reg1], %[temp_reg2], 31                          \n\t"
 554             "movn  %[t1],%[C_5], %[temp_reg1]                              \n\t"
 555             "sub   %[temp_reg4], %[temp_reg4], %[temp_reg3]                \n\t"
 556             "mfhi  %[temp_reg1], $ac3                                      \n\t"
 557             "sra   %[temp_reg3], %[t4],        31                          \n\t"
 558             "movn  %[t0],        %[C_3A],      %[temp_reg3]                \n\t"
 559             "mfhi  %[temp_reg3], $ac2                                      \n\t"
 560             "sub   %[t3],        %[temp_reg4], %[t3]                       \n\t"
 561             "add   %[temp_reg4], %[t3],        %[t2]                       \n\t"
 562             "sub   %[temp_reg1], %[temp_reg1], %[temp_reg2]                \n\t"
 563             "sub   %[t1],        %[temp_reg1], %[t1]                       \n\t"
 564             "sub   %[t0],        %[temp_reg3], %[t0]                       \n\t"
 565             "add   %[temp_reg1], %[t2],        %[t1]                       \n\t"
 566             "add   %[temp_reg4], %[temp_reg4], %[t0]                       \n\t"
 567             "sub   %[temp_reg2], %[t3],        %[t1]                       \n\t"
 568             "sw    %[temp_reg4], 0*4(%[tmp1])                              \n\t"
 569             "sub   %[temp_reg1], %[temp_reg1], %[t0]                       \n\t"
 570             "sub   %[temp_reg2], %[temp_reg2], %[t0]                       \n\t"
 571             "sw    %[temp_reg1], 12*4(%[tmp1])                             \n\t"
 572             "sw    %[temp_reg2], 8*4(%[tmp1])                              \n\t"
 573
 574             : [t7] "=&r" (t7), [temp_reg1] "=&r" (temp_reg1),
 575               [temp_reg2] "=&r" (temp_reg2), [temp_reg4] "=&r" (temp_reg4),
 576               [temp_reg3] "=&r" (temp_reg3), [t8] "=&r" (t8), [t0] "=&r" (t0),
 577               [t4] "=&r" (t4), [t5] "=&r" (t5), [t6] "=&r"(t6), [t2] "=&r" (t2),
 578               [t3] "=&r" (t3), [t1] "=&r" (t1)
 579             : [C_2] "r" (C_2), [in1] "r" (in1), [tmp1] "r" (tmp1), [C_8] "r" (C_8),
 580               [C_4] "r" (C_4), [C_3] "r" (C_3), [C_1] "r" (C_1), [C_7] "r" (C_7),
 581               [C_3A] "r" (C_3A), [C_5] "r" (C_5)
 582             : "memory", "hi", "lo", "$ac1hi", "$ac1lo", "$ac2hi", "$ac2lo",
 583               "$ac3hi", "$ac3lo"
 584          );
 585     }
 586
 587     /**
 588     * loop is unrolled four times
 589     *
 590     * values defined in tables(icos36[] and icos36h[]) are not loaded from
 591     * these tables - they are directly loaded in appropriate registers
 592     *
 593     */
 594
 595     __asm__ volatile (
 596         "lw     %[t2],        1*4(%[tmp])                                  \n\t"
 597         "lw     %[t3],        3*4(%[tmp])                                  \n\t"
 598         "lw     %[t0],        0*4(%[tmp])                                  \n\t"
 599         "lw     %[t1],        2*4(%[tmp])                                  \n\t"
 600         "addu   %[temp_reg1], %[t3],        %[t2]                          \n\t"
 601         "li     %[temp_reg2], 0x807D2B1E                                   \n\t"
 602         "move   %[s1],        $0                                           \n\t"
 603         "multu  %[temp_reg2], %[temp_reg1]                                 \n\t"
 604         "sra    %[temp_reg1], %[temp_reg1], 31                             \n\t"
 605         "movn   %[s1],        %[temp_reg2], %[temp_reg1]                   \n\t"
 606         "sub    %[temp_reg3], %[t3],        %[t2]                          \n\t"
 607         "li     %[temp_reg4], 0x2de5151                                    \n\t"
 608         "mfhi   %[temp_reg2]                                               \n\t"
 609         "addu   %[s0],        %[t1],        %[t0]                          \n\t"
 610         "lw     %[temp_reg5], 9*4(%[win])                                  \n\t"
 611         "mult   $ac1,         %[temp_reg4], %[temp_reg3]                   \n\t"
 612         "lw     %[temp_reg6], 4*9*4(%[buf])                                \n\t"
 613         "sub    %[s2],        %[t1],        %[t0]                          \n\t"
 614         "lw     %[temp_reg3], 29*4(%[win])                                 \n\t"
 615         "subu   %[s1],        %[temp_reg2], %[s1]                          \n\t"
 616         "lw     %[temp_reg4], 28*4(%[win])                                 \n\t"
 617         "add    %[t0],        %[s0],        %[s1]                          \n\t"
 618         "extr.w %[s3],        $ac1,23                                      \n\t"
 619         "mult   $ac2,         %[t0],        %[temp_reg3]                   \n\t"
 620         "sub    %[t1],        %[s0],        %[s1]                          \n\t"
 621         "lw     %[temp_reg1], 4*8*4(%[buf])                                \n\t"
 622         "mult   %[t1],        %[temp_reg5]                                 \n\t"
 623         "lw     %[temp_reg2], 8*4(%[win])                                  \n\t"
 624         "mfhi   %[temp_reg3], $ac2                                         \n\t"
 625         "mult   $ac3,         %[t0],        %[temp_reg4]                   \n\t"
 626         "add    %[t0],        %[s2],        %[s3]                          \n\t"
 627         "mfhi   %[temp_reg5]                                               \n\t"
 628         "mult   $ac1,         %[t1],        %[temp_reg2]                   \n\t"
 629         "sub    %[t1],        %[s2],        %[s3]                          \n\t"
 630         "sw     %[temp_reg3], 4*9*4(%[buf])                                \n\t"
 631         "mfhi   %[temp_reg4], $ac3                                         \n\t"
 632         "lw     %[temp_reg3], 37*4(%[win])                                 \n\t"
 633         "mfhi   %[temp_reg2], $ac1                                         \n\t"
 634         "add    %[temp_reg5], %[temp_reg5], %[temp_reg6]                   \n\t"
 635         "lw     %[temp_reg6], 17*4(%[win])                                 \n\t"
 636         "sw     %[temp_reg5], 32*9*4(%[out])                               \n\t"
 637         "sw     %[temp_reg4], 4*8*4(%[buf])                                \n\t"
 638         "mult   %[t1],        %[temp_reg6]                                 \n\t"
 639         "add    %[temp_reg1], %[temp_reg1], %[temp_reg2]                   \n\t"
 640         "lw     %[temp_reg2], 0*4(%[win])                                  \n\t"
 641         "lw     %[temp_reg5], 4*17*4(%[buf])                               \n\t"
 642         "sw     %[temp_reg1], 8*32*4(%[out])                               \n\t"
 643         "mfhi   %[temp_reg6]                                               \n\t"
 644         "mult   $ac1,         %[t1],        %[temp_reg2]                   \n\t"
 645         "lw     %[temp_reg4], 20*4(%[win])                                 \n\t"
 646         "lw     %[temp_reg1], 0(%[buf])                                    \n\t"
 647         "mult   $ac2,         %[t0],        %[temp_reg3]                   \n\t"
 648         "mult   %[t0],        %[temp_reg4]                                 \n\t"
 649         "mfhi   %[temp_reg2], $ac1                                         \n\t"
 650         "lw     %[t0],        4*4(%[tmp])                                  \n\t"
 651         "add    %[temp_reg5], %[temp_reg5], %[temp_reg6]                   \n\t"
 652         "mfhi   %[temp_reg3], $ac2                                         \n\t"
 653         "mfhi   %[temp_reg4]                                               \n\t"
 654         "sw     %[temp_reg5], 17*32*4(%[out])                              \n\t"
 655         "lw     %[t1],        6*4(%[tmp])                                  \n\t"
 656         "add    %[temp_reg1], %[temp_reg1], %[temp_reg2]                   \n\t"
 657         "lw     %[t2],        5*4(%[tmp])                                  \n\t"
 658         "sw     %[temp_reg1], 0*32*4(%[out])                               \n\t"
 659         "addu   %[s0],        %[t1],        %[t0]                          \n\t"
 660         "sw     %[temp_reg3], 4*17*4(%[buf])                               \n\t"
 661         "lw     %[t3],        7*4(%[tmp])                                  \n\t"
 662         "sub    %[s2],        %[t1],        %[t0]                          \n\t"
 663         "sw     %[temp_reg4], 0(%[buf])                                    \n\t"
 664         "addu   %[temp_reg5], %[t3],        %[t2]                          \n\t"
 665         "li     %[temp_reg6], 0x8483EE0C                                   \n\t"
 666         "move   %[s1],        $0                                           \n\t"
 667         "multu  %[temp_reg6], %[temp_reg5]                                 \n\t"
 668         "sub    %[temp_reg1], %[t3],        %[t2]                          \n\t"
 669         "li     %[temp_reg2], 0xf746ea                                     \n\t"
 670         "sra    %[temp_reg5], %[temp_reg5], 31                             \n\t"
 671         "mult   $ac1,         %[temp_reg2], %[temp_reg1]                   \n\t"
 672         "movn   %[s1],        %[temp_reg6], %[temp_reg5]                   \n\t"
 673         "mfhi   %[temp_reg5]                                               \n\t"
 674         "lw     %[temp_reg3], 10*4(%[win])                                 \n\t"
 675         "lw     %[temp_reg4], 4*10*4(%[buf])                               \n\t"
 676         "extr.w %[s3],        $ac1,         23                             \n\t"
 677         "lw     %[temp_reg1], 4*7*4(%[buf])                                \n\t"
 678         "lw     %[temp_reg2], 7*4(%[win])                                  \n\t"
 679         "lw     %[temp_reg6], 30*4(%[win])                                 \n\t"
 680         "subu   %[s1],        %[temp_reg5], %[s1]                          \n\t"
 681         "sub    %[t1],        %[s0],        %[s1]                          \n\t"
 682         "add    %[t0],        %[s0],        %[s1]                          \n\t"
 683         "mult   $ac2,         %[t1],        %[temp_reg3]                   \n\t"
 684         "mult   $ac3,         %[t1],        %[temp_reg2]                   \n\t"
 685         "mult   %[t0],        %[temp_reg6]                                 \n\t"
 686         "lw     %[temp_reg5], 27*4(%[win])                                 \n\t"
 687         "mult   $ac1,         %[t0],        %[temp_reg5]                   \n\t"
 688         "mfhi   %[temp_reg3], $ac2                                         \n\t"
 689         "mfhi   %[temp_reg2], $ac3                                         \n\t"
 690         "mfhi   %[temp_reg6]                                               \n\t"
 691         "add    %[t0],        %[s2],        %[s3]                          \n\t"
 692         "sub    %[t1],        %[s2],        %[s3]                          \n\t"
 693         "add    %[temp_reg3], %[temp_reg3], %[temp_reg4]                   \n\t"
 694         "lw     %[temp_reg4], 16*4(%[win])                                 \n\t"
 695         "mfhi   %[temp_reg5], $ac1                                         \n\t"
 696         "sw     %[temp_reg3], 32*10*4(%[out])                              \n\t"
 697         "add    %[temp_reg1], %[temp_reg1], %[temp_reg2]                   \n\t"
 698         "lw     %[temp_reg3], 4*16*4(%[buf])                               \n\t"
 699         "sw     %[temp_reg6], 4*10*4(%[buf])                               \n\t"
 700         "sw     %[temp_reg1], 7*32*4(%[out])                               \n\t"
 701         "mult   $ac2,         %[t1],        %[temp_reg4]                   \n\t"
 702         "sw     %[temp_reg5], 4*7*4(%[buf])                                \n\t"
 703         "lw     %[temp_reg6], 1*4(%[win])                                  \n\t"
 704         "lw     %[temp_reg5], 4*1*4(%[buf])                                \n\t"
 705         "lw     %[temp_reg1], 36*4(%[win])                                 \n\t"
 706         "mult   $ac3,         %[t1],        %[temp_reg6]                   \n\t"
 707         "lw     %[temp_reg2], 21*4(%[win])                                 \n\t"
 708         "mfhi   %[temp_reg4], $ac2                                         \n\t"
 709         "mult   %[t0],        %[temp_reg1]                                 \n\t"
 710         "mult   $ac1,         %[t0],%[temp_reg2]                           \n\t"
 711         "lw     %[t0],        8*4(%[tmp])                                  \n\t"
 712         "mfhi   %[temp_reg6], $ac3                                         \n\t"
 713         "lw     %[t1],        10*4(%[tmp])                                 \n\t"
 714         "lw     %[t3],        11*4(%[tmp])                                 \n\t"
 715         "mfhi   %[temp_reg1]                                               \n\t"
 716         "add    %[temp_reg3], %[temp_reg3], %[temp_reg4]                   \n\t"
 717         "lw     %[t2],        9*4(%[tmp])                                  \n\t"
 718         "mfhi   %[temp_reg2], $ac1                                         \n\t"
 719         "add    %[temp_reg5], %[temp_reg5], %[temp_reg6]                   \n\t"
 720         "sw     %[temp_reg3], 16*32*4(%[out])                              \n\t"
 721         "sw     %[temp_reg5], 1*32*4(%[out])                               \n\t"
 722         "sw     %[temp_reg1], 4*16*4(%[buf])                               \n\t"
 723         "addu   %[temp_reg3], %[t3],        %[t2]                          \n\t"
 724         "li     %[temp_reg4], 0x8D3B7CD6                                   \n\t"
 725         "sw     %[temp_reg2], 4*1*4(%[buf])                                \n\t"
 726         "multu  %[temp_reg4],%[temp_reg3]                                  \n\t"
 727         "sra    %[temp_reg3], %[temp_reg3], 31                             \n\t"
 728         "move   %[s1],        $0                                           \n\t"
 729         "movn   %[s1],        %[temp_reg4], %[temp_reg3]                   \n\t"
 730         "addu   %[s0],        %[t1],        %[t0]                          \n\t"
 731         "mfhi   %[temp_reg3]                                               \n\t"
 732         "sub    %[s2],        %[t1],        %[t0]                          \n\t"
 733         "sub    %[temp_reg5], %[t3],        %[t2]                          \n\t"
 734         "li     %[temp_reg6], 0x976fd9                                     \n\t"
 735         "lw     %[temp_reg2], 11*4(%[win])                                 \n\t"
 736         "lw     %[temp_reg1], 4*11*4(%[buf])                               \n\t"
 737         "mult   $ac1,         %[temp_reg6], %[temp_reg5]                   \n\t"
 738         "subu   %[s1],        %[temp_reg3], %[s1]                          \n\t"
 739         "lw     %[temp_reg5], 31*4(%[win])                                 \n\t"
 740         "sub    %[t1],        %[s0],        %[s1]                          \n\t"
 741         "add    %[t0],        %[s0],        %[s1]                          \n\t"
 742         "mult   $ac2,         %[t1],        %[temp_reg2]                   \n\t"
 743         "mult   %[t0],        %[temp_reg5]                                 \n\t"
 744         "lw     %[temp_reg4], 6*4(%[win])                                  \n\t"
 745         "extr.w %[s3],        $ac1,         23                             \n\t"
 746         "lw     %[temp_reg3], 4*6*4(%[buf])                                \n\t"
 747         "mfhi   %[temp_reg2], $ac2                                         \n\t"
 748         "lw     %[temp_reg6], 26*4(%[win])                                 \n\t"
 749         "mfhi   %[temp_reg5]                                               \n\t"
 750         "mult   $ac3,         %[t1],        %[temp_reg4]                   \n\t"
 751         "mult   $ac1,         %[t0],        %[temp_reg6]                   \n\t"
 752         "add    %[t0],        %[s2],        %[s3]                          \n\t"
 753         "sub    %[t1],        %[s2],        %[s3]                          \n\t"
 754         "add    %[temp_reg2], %[temp_reg2], %[temp_reg1]                   \n\t"
 755         "mfhi   %[temp_reg4], $ac3                                         \n\t"
 756         "mfhi   %[temp_reg6], $ac1                                         \n\t"
 757         "sw     %[temp_reg5], 4*11*4(%[buf])                               \n\t"
 758         "sw     %[temp_reg2], 32*11*4(%[out])                              \n\t"
 759         "lw     %[temp_reg1], 4*15*4(%[buf])                               \n\t"
 760         "add    %[temp_reg3], %[temp_reg3], %[temp_reg4]                   \n\t"
 761         "lw     %[temp_reg2], 15*4(%[win])                                 \n\t"
 762         "sw     %[temp_reg3], 6*32*4(%[out])                               \n\t"
 763         "sw     %[temp_reg6], 4*6*4(%[buf])                                \n\t"
 764         "mult   %[t1],        %[temp_reg2]                                 \n\t"
 765         "lw     %[temp_reg3], 2*4(%[win])                                  \n\t"
 766         "lw     %[temp_reg4], 4*2*4(%[buf])                                \n\t"
 767         "lw     %[temp_reg5], 35*4(%[win])                                 \n\t"
 768         "mult   $ac1,         %[t1],        %[temp_reg3]                   \n\t"
 769         "mfhi   %[temp_reg2]                                               \n\t"
 770         "lw     %[temp_reg6], 22*4(%[win])                                 \n\t"
 771         "mult   $ac2,         %[t0],        %[temp_reg5]                   \n\t"
 772         "lw     %[t1],        14*4(%[tmp])                                 \n\t"
 773         "mult   $ac3,         %[t0],        %[temp_reg6]                   \n\t"
 774         "lw     %[t0],        12*4(%[tmp])                                 \n\t"
 775         "mfhi   %[temp_reg3], $ac1                                         \n\t"
 776         "add    %[temp_reg1], %[temp_reg1], %[temp_reg2]                   \n\t"
 777         "mfhi   %[temp_reg5], $ac2                                         \n\t"
 778         "sw     %[temp_reg1], 15*32*4(%[out])                              \n\t"
 779         "mfhi   %[temp_reg6], $ac3                                         \n\t"
 780         "lw     %[t2],        13*4(%[tmp])                                 \n\t"
 781         "lw     %[t3],        15*4(%[tmp])                                 \n\t"
 782         "add    %[temp_reg4], %[temp_reg4], %[temp_reg3]                   \n\t"
 783         "sw     %[temp_reg5], 4*15*4(%[buf])                               \n\t"
 784         "addu   %[temp_reg1], %[t3],        %[t2]                          \n\t"
 785         "li     %[temp_reg2], 0x9C42577C                                   \n\t"
 786         "move   %[s1],        $0                                           \n\t"
 787         "multu  %[temp_reg2], %[temp_reg1]                                 \n\t"
 788         "sw     %[temp_reg4], 2*32*4(%[out])                               \n\t"
 789         "sra    %[temp_reg1], %[temp_reg1], 31                             \n\t"
 790         "movn   %[s1],        %[temp_reg2], %[temp_reg1]                   \n\t"
 791         "sub    %[temp_reg3], %[t3],        %[t2]                          \n\t"
 792         "li     %[temp_reg4], 0x6f94a2                                     \n\t"
 793         "mfhi   %[temp_reg1]                                               \n\t"
 794         "addu   %[s0],        %[t1],        %[t0]                          \n\t"
 795         "sw     %[temp_reg6], 4*2*4(%[buf])                                \n\t"
 796         "mult   $ac1,         %[temp_reg4], %[temp_reg3]                   \n\t"
 797         "sub    %[s2],        %[t1],        %[t0]                          \n\t"
 798         "lw     %[temp_reg5], 12*4(%[win])                                 \n\t"
 799         "lw     %[temp_reg6], 4*12*4(%[buf])                               \n\t"
 800         "subu   %[s1],        %[temp_reg1], %[s1]                          \n\t"
 801         "sub    %[t1],        %[s0],        %[s1]                          \n\t"
 802         "lw     %[temp_reg3], 32*4(%[win])                                 \n\t"
 803         "mult   $ac2,         %[t1],        %[temp_reg5]                   \n\t"
 804         "add    %[t0],        %[s0],        %[s1]                          \n\t"
 805         "extr.w %[s3],        $ac1,         23                             \n\t"
 806         "lw     %[temp_reg2], 5*4(%[win])                                  \n\t"
 807         "mult   %[t0],        %[temp_reg3]                                 \n\t"
 808         "mfhi   %[temp_reg5], $ac2                                         \n\t"
 809         "lw     %[temp_reg4], 25*4(%[win])                                 \n\t"
 810         "lw     %[temp_reg1], 4*5*4(%[buf])                                \n\t"
 811         "mult   $ac3,         %[t1],        %[temp_reg2]                   \n\t"
 812         "mult   $ac1,         %[t0],        %[temp_reg4]                   \n\t"
 813         "mfhi   %[temp_reg3]                                               \n\t"
 814         "add    %[t0],        %[s2],        %[s3]                          \n\t"
 815         "add    %[temp_reg5], %[temp_reg5], %[temp_reg6]                   \n\t"
 816         "mfhi   %[temp_reg2], $ac3                                         \n\t"
 817         "mfhi   %[temp_reg4], $ac1                                         \n\t"
 818         "sub    %[t1],        %[s2],        %[s3]                          \n\t"
 819         "sw     %[temp_reg5], 32*12*4(%[out])                              \n\t"
 820         "sw     %[temp_reg3], 4*12*4(%[buf])                               \n\t"
 821         "lw     %[temp_reg6], 14*4(%[win])                                 \n\t"
 822         "lw     %[temp_reg5], 4*14*4(%[buf])                               \n\t"
 823         "add    %[temp_reg1], %[temp_reg1], %[temp_reg2]                   \n\t"
 824         "sw     %[temp_reg4], 4*5*4(%[buf])                                \n\t"
 825         "sw     %[temp_reg1], 5*32*4(%[out])                               \n\t"
 826         "mult   %[t1],        %[temp_reg6]                                 \n\t"
 827         "lw     %[temp_reg4], 34*4(%[win])                                 \n\t"
 828         "lw     %[temp_reg2], 3*4(%[win])                                  \n\t"
 829         "lw     %[temp_reg1], 4*3*4(%[buf])                                \n\t"
 830         "mult   $ac2,         %[t0],        %[temp_reg4]                   \n\t"
 831         "mfhi   %[temp_reg6]                                               \n\t"
 832         "mult   $ac1,         %[t1],        %[temp_reg2]                   \n\t"
 833         "lw     %[temp_reg3], 23*4(%[win])                                 \n\t"
 834         "lw     %[s0],        16*4(%[tmp])                                 \n\t"
 835         "mfhi   %[temp_reg4], $ac2                                         \n\t"
 836         "lw     %[t1],        17*4(%[tmp])                                 \n\t"
 837         "mult   $ac3,         %[t0],        %[temp_reg3]                   \n\t"
 838         "move   %[s1],        $0                                           \n\t"
 839         "add    %[temp_reg5], %[temp_reg5], %[temp_reg6]                   \n\t"
 840         "mfhi   %[temp_reg2], $ac1                                         \n\t"
 841         "sw     %[temp_reg5], 14*32*4(%[out])                              \n\t"
 842         "sw     %[temp_reg4], 4*14*4(%[buf])                               \n\t"
 843         "mfhi   %[temp_reg3], $ac3                                         \n\t"
 844         "li     %[temp_reg5], 0xB504F334                                   \n\t"
 845         "add    %[temp_reg1], %[temp_reg1], %[temp_reg2]                   \n\t"
 846         "multu  %[temp_reg5], %[t1]                                        \n\t"
 847         "lw     %[temp_reg2], 4*13*4(%[buf])                               \n\t"
 848         "sw     %[temp_reg1], 3*32*4(%[out])                               \n\t"
 849         "sra    %[t1],        %[t1],        31                             \n\t"
 850         "mfhi   %[temp_reg6]                                               \n\t"
 851         "movn   %[s1],        %[temp_reg5], %[t1]                          \n\t"
 852         "sw     %[temp_reg3], 4*3*4(%[buf])                                \n\t"
 853         "lw     %[temp_reg1], 13*4(%[win])                                 \n\t"
 854         "lw     %[temp_reg4], 4*4*4(%[buf])                                \n\t"
 855         "lw     %[temp_reg3], 4*4(%[win])                                  \n\t"
 856         "lw     %[temp_reg5], 33*4(%[win])                                 \n\t"
 857         "subu   %[s1],        %[temp_reg6], %[s1]                          \n\t"
 858         "lw     %[temp_reg6], 24*4(%[win])                                 \n\t"
 859         "sub    %[t1],        %[s0],        %[s1]                          \n\t"
 860         "add    %[t0],        %[s0],        %[s1]                          \n\t"
 861         "mult   $ac1,         %[t1],        %[temp_reg1]                   \n\t"
 862         "mult   $ac2,         %[t1],        %[temp_reg3]                   \n\t"
 863         "mult   $ac3,         %[t0],        %[temp_reg5]                   \n\t"
 864         "mult   %[t0],        %[temp_reg6]                                 \n\t"
 865         "mfhi   %[temp_reg1], $ac1                                         \n\t"
 866         "mfhi   %[temp_reg3], $ac2                                         \n\t"
 867         "mfhi   %[temp_reg5], $ac3                                         \n\t"
 868         "mfhi   %[temp_reg6]                                               \n\t"
 869         "add    %[temp_reg2], %[temp_reg2], %[temp_reg1]                   \n\t"
 870         "add    %[temp_reg4], %[temp_reg4], %[temp_reg3]                   \n\t"
 871         "sw     %[temp_reg2], 13*32*4(%[out])                              \n\t"
 872         "sw     %[temp_reg4], 4*32*4(%[out])                               \n\t"
 873         "sw     %[temp_reg5], 4*13*4(%[buf])                               \n\t"
 874         "sw     %[temp_reg6], 4*4*4(%[buf])                                \n\t"
 875
 876         : [t0] "=&r" (t0), [t1] "=&r" (t1), [t2] "=&r" (t2), [t3] "=&r" (t3),
 877           [s0] "=&r" (s0), [s2] "=&r" (s2), [temp_reg1] "=&r" (temp_reg1),
 878           [temp_reg2] "=&r" (temp_reg2), [s1] "=&r" (s1), [s3] "=&r" (s3),
 879           [temp_reg3] "=&r" (temp_reg3), [temp_reg4] "=&r" (temp_reg4),
 880           [temp_reg5] "=&r" (temp_reg5), [temp_reg6] "=&r" (temp_reg6),
 881           [out] "+r" (out)
 882         : [tmp] "r" (tmp), [win] "r" (win), [buf] "r" (buf)
 883         : "memory", "hi", "lo", "$ac1hi", "$ac1lo", "$ac2hi", "$ac2lo",
 884           "$ac3hi", "$ac3lo"
 885     );
 886 }
 887
 888 static void ff_imdct36_blocks_mips_fixed(int *out, int *buf, int *in,
 889                                int count, int switch_point, int block_type)
 890 {
 891     int j;
 892     for (j=0 ; j < count; j++) {
 893         /* apply window & overlap with previous buffer */
 894
 895         /* select window */
 896         int win_idx = (switch_point && j < 2) ? 0 : block_type;
 897         int *win = ff_mdct_win_fixed[win_idx + (4 & -(j & 1))];
 898
 899         imdct36_mips_fixed(out, buf, in, win);
 900
 901         in  += 18;
 902         buf += ((j&3) != 3 ? 1 : (72-3));
 903         out++;
 904     }
 905 }
 906
 907 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
 908 #endif /* HAVE_INLINE_ASM */
 909
 910 void ff_mpadsp_init_mipsdsp(MPADSPContext *s)
 911 {
 912 #if HAVE_INLINE_ASM
 913 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
 914     s->apply_window_fixed   = ff_mpadsp_apply_window_mips_fixed;
 915     s->imdct36_blocks_fixed = ff_imdct36_blocks_mips_fixed;
 916 #endif
 917 #endif
 918 }