mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
2.0 KiB
69 lines
2.0 KiB
/* |
|
* 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 */
|
|
|