libavcodec/bfin/mathops.h

   1 /*
   2  * mathops.h
   3  *
   4  * Copyright (C) 2007 Marc Hoffman <mmhoffm@gmail.com>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22 #ifndef AVCODEC_BFIN_MATHOPS_H
  23 #define AVCODEC_BFIN_MATHOPS_H
  24
  25 #if CONFIG_MPEGAUDIO_HP
  26 #define MULH(X,Y) ({ int xxo;                           \
  27     __asm__ (                                               \
  28         "a1 = %2.L * %1.L (FU);\n\t"                    \
  29         "a1 = a1 >> 16;\n\t"                            \
  30         "a1 += %2.H * %1.L (IS,M);\n\t"                 \
  31         "a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\
  32         "a1 = a1 >>> 16;\n\t"                           \
  33         "%0 = (a0 += a1);\n\t"                          \
  34         : "=d" (xxo) : "d" (X), "d" (Y) : "A0","A1"); xxo; })
  35 #else
  36 #define MULH(X,Y) ({ int xxo;                           \
  37     __asm__ (                                               \
  38         "a1 = %2.H * %1.L (IS,M);\n\t"                  \
  39         "a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\
  40         "a1 = a1 >>> 16;\n\t"                           \
  41         "%0 = (a0 += a1);\n\t"                          \
  42         : "=d" (xxo) : "d" (X), "d" (Y) : "A0","A1"); xxo; })
  43 #endif
  44
  45 /* signed 16x16 -> 32 multiply */
  46 #define MUL16(a, b) ({ int xxo;                         \
  47     __asm__ (                                               \
  48        "%0 = %1.l*%2.l (is);\n\t"                       \
  49        : "=W" (xxo) : "d" (a), "d" (b) : "A1");         \
  50     xxo; })
  51
  52 #endif /* AVCODEC_BFIN_MATHOPS_H */