mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-31 12:36:41 +08:00
be449fca79
Neither the asm() nor the __asm__() keyword is part of the C99 standard, but while GCC accepts the former in C89 syntax, it is not accepted in C99 unless GNU extensions are turned on (with -fasm). The latter form is accepted in any syntax as an extension (without requiring further command-line options). Sun Studio C99 compiler also does not accept asm() while accepting __asm__(), albeit reporting warnings that it's not valid C99 syntax. Originally committed as revision 15627 to svn://svn.ffmpeg.org/ffmpeg/trunk
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/*
|
|
* simple math operations
|
|
* Copyright (c) 2001, 2002 Fabrice Bellard.
|
|
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
|
|
*
|
|
* 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_PPC_MATHOPS_H
|
|
#define AVCODEC_PPC_MATHOPS_H
|
|
|
|
#if defined(ARCH_POWERPC_405)
|
|
/* signed 16x16 -> 32 multiply add accumulate */
|
|
#define MAC16(rt, ra, rb) \
|
|
__asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
|
|
|
|
/* signed 16x16 -> 32 multiply */
|
|
#define MUL16(ra, rb) \
|
|
({ int __rt; \
|
|
__asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
|
|
__rt; })
|
|
#endif
|
|
|
|
#endif /* AVCODEC_PPC_MATHOPS_H */
|