1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/*
* 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_I386_MATHOPS_H
#define AVCODEC_I386_MATHOPS_H
#ifdef FRAC_BITS
# define MULL(ra, rb) \
({ 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"(FRAC_BITS));\
rt; })
#endif
#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 /* AVCODEC_I386_MATHOPS_H */
|
