libavcodec/sh4/sh4.h

   1 /*
   2  * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVCODEC_SH4_SH4_H
  22 #define AVCODEC_SH4_SH4_H
  23
  24 #ifdef __SH4__
  25 #   define fp_single_enter(fpscr)                               \
  26     do {                                                        \
  27         __asm__ volatile ("sts   fpscr, %0     \n\t"            \
  28                           "and   %1,    %0     \n\t"            \
  29                           "lds   %0,    fpscr  \n\t"            \
  30                           : "=&r"(fpscr) : "r"(~(1<<19)));      \
  31     } while (0)
  32
  33 #   define fp_single_leave(fpscr)                       \
  34     do {                                                \
  35         __asm__ volatile ("or    %1,    %0     \n\t"    \
  36                           "lds   %0,    fpscr  \n\t"    \
  37                           : "+r"(fpscr) : "r"(1<<19));  \
  38     } while (0)
  39 #else
  40 #   define fp_single_enter(fpscr) ((void)fpscr)
  41 #   define fp_single_leave(fpscr)
  42 #endif
  43
  44 #endif /* AVCODEC_SH4_SH4_H */