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SH4: add macros for setting and restoring FPSCR.PR bit

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Originally committed as revision 15887 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2008-11-20 09:21:50 +00:00
parent 6f14b19e48
commit 1a9e9a2fbd
1 changed files with 44 additions and 0 deletions
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libavcodec/sh4/sh4.h Normal file
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/*
* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_SH4_SH4_H
#define AVCODEC_SH4_SH4_H
#ifdef __SH4__
# define fp_single_enter(fpscr) \
do { \
__asm__ volatile ("sts fpscr, %0 \n\t" \
"and %1, %0 \n\t" \
"lds %0, fpscr \n\t" \
: "=&r"(fpscr) : "r"(~(1<<19))); \
} while (0)
# define fp_single_leave(fpscr) \
do { \
__asm__ volatile ("or %1, %0 \n\t" \
"lds %0, fpscr \n\t" \
: "=&r"(fpscr) : "r"(1<<19)); \
} while (0)
#else
# define fp_single_enter(fpscr) ((void)fpscr)
# define fp_single_leave(fpscr)
#endif
#endif /* AVCODEC_SH4_SH4_H */