add multiple inclusion guards to headers
[libav.git] / libavcodec / i386 / mathops.h
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1/*
2 * simple math operations
3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
99aed7c8 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
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22#ifndef AVCODEC_X86_MATHOPS_H
23#define AVCODEC_X86_MATHOPS_H
24
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25#ifdef FRAC_BITS
26# define MULL(ra, rb) \
27 ({ int rt, dummy; asm (\
28 "imull %3 \n\t"\
29 "shrdl %4, %%edx, %%eax \n\t"\
30 : "=a"(rt), "=d"(dummy)\
31 : "a" (ra), "rm" (rb), "i"(FRAC_BITS));\
32 rt; })
33#endif
34
35#define MULH(ra, rb) \
36 ({ int rt, dummy;\
37 asm ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" (ra), "rm" (rb));\
38 rt; })
39
40#define MUL64(ra, rb) \
41 ({ int64_t rt;\
42 asm ("imull %2\n\t" : "=A"(rt) : "a" (ra), "g" (rb));\
43 rt; })
44
699b3f99 45#endif