FFmpeg: libavcodec/sh4/sh4.h Source File

00001 /*
00002  * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #ifndef AVCODEC_SH4_SH4_H
00022 #define AVCODEC_SH4_SH4_H
00023 
00024 #ifdef __SH4__
00025 #   define fp_single_enter(fpscr)                               \
00026     do {                                                        \
00027         __asm__ volatile ("sts   fpscr, %0     \n\t"            \
00028                           "and   %1,    %0     \n\t"            \
00029                           "lds   %0,    fpscr  \n\t"            \
00030                           : "=&r"(fpscr) : "r"(~(1<<19)));      \
00031     } while (0)
00032 
00033 #   define fp_single_leave(fpscr)                       \
00034     do {                                                \
00035         __asm__ volatile ("or    %1,    %0     \n\t"    \
00036                           "lds   %0,    fpscr  \n\t"    \
00037                           : "+r"(fpscr) : "r"(1<<19));  \
00038     } while (0)
00039 #else
00040 #   define fp_single_enter(fpscr) ((void)fpscr)
00041 #   define fp_single_leave(fpscr)
00042 #endif
00043 
00044 #endif /* AVCODEC_SH4_SH4_H */