mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 11:22:14 +00:00
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*
|
|
* simple math operations
|
|
* 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_X86_MATHOPS_H
|
|
#define AVCODEC_X86_MATHOPS_H
|
|
|
|
#include "config.h"
|
|
#include "libavutil/common.h"
|
|
|
|
#if ARCH_X86_32
|
|
#define MULL(ra, rb, shift) \
|
|
({ int rt, dummy; __asm__ (\
|
|
"imull %3 \n\t"\
|
|
"shrdl %4, %%edx, %%eax \n\t"\
|
|
: "=a"(rt), "=d"(dummy)\
|
|
: "a" ((int)ra), "rm" ((int)rb), "i"(shift));\
|
|
rt; })
|
|
|
|
#define MULH(ra, rb) \
|
|
({ int rt, dummy;\
|
|
__asm__ ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" ((int)ra), "rm" ((int)rb));\
|
|
rt; })
|
|
|
|
#define MUL64(ra, rb) \
|
|
({ int64_t rt;\
|
|
__asm__ ("imull %2\n\t" : "=A"(rt) : "a" ((int)ra), "g" ((int)rb));\
|
|
rt; })
|
|
#endif
|
|
|
|
#if HAVE_CMOV
|
|
/* median of 3 */
|
|
#define mid_pred mid_pred
|
|
static inline av_const int mid_pred(int a, int b, int c)
|
|
{
|
|
int i=b;
|
|
__asm__ volatile(
|
|
"cmp %2, %1 \n\t"
|
|
"cmovg %1, %0 \n\t"
|
|
"cmovg %2, %1 \n\t"
|
|
"cmp %3, %1 \n\t"
|
|
"cmovl %3, %1 \n\t"
|
|
"cmp %1, %0 \n\t"
|
|
"cmovg %1, %0 \n\t"
|
|
:"+&r"(i), "+&r"(a)
|
|
:"r"(b), "r"(c)
|
|
);
|
|
return i;
|
|
}
|
|
#endif
|
|
|
|
#endif /* AVCODEC_X86_MATHOPS_H */
|