Move COPY3_IF_LT to lavc/mathops.h
[libav.git] / libavcodec / x86 / 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
699b3f99 24
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25#include "config.h"
26#include "libavutil/common.h"
27
6166516d 28#if ARCH_X86_32
4deaa946 29#define MULL(ra, rb, shift) \
be449fca 30 ({ int rt, dummy; __asm__ (\
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31 "imull %3 \n\t"\
32 "shrdl %4, %%edx, %%eax \n\t"\
33 : "=a"(rt), "=d"(dummy)\
4deaa946 34 : "a" ((int)ra), "rm" ((int)rb), "i"(shift));\
99aed7c8 35 rt; })
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36
37#define MULH(ra, rb) \
38 ({ int rt, dummy;\
be449fca 39 __asm__ ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" ((int)ra), "rm" ((int)rb));\
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40 rt; })
41
42#define MUL64(ra, rb) \
43 ({ int64_t rt;\
be449fca 44 __asm__ ("imull %2\n\t" : "=A"(rt) : "a" ((int)ra), "g" ((int)rb));\
99aed7c8 45 rt; })
6166516d 46#endif
99aed7c8 47
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48#if HAVE_CMOV
49/* median of 3 */
50#define mid_pred mid_pred
51static inline av_const int mid_pred(int a, int b, int c)
52{
53 int i=b;
54 __asm__ volatile(
55 "cmp %2, %1 \n\t"
56 "cmovg %1, %0 \n\t"
57 "cmovg %2, %1 \n\t"
58 "cmp %3, %1 \n\t"
59 "cmovl %3, %1 \n\t"
60 "cmp %1, %0 \n\t"
61 "cmovg %1, %0 \n\t"
62 :"+&r"(i), "+&r"(a)
63 :"r"(b), "r"(c)
64 );
65 return i;
66}
67#endif
68
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69#if HAVE_CMOV
70#define COPY3_IF_LT(x, y, a, b, c, d)\
71__asm__ volatile(\
72 "cmpl %0, %3 \n\t"\
73 "cmovl %3, %0 \n\t"\
74 "cmovl %4, %1 \n\t"\
75 "cmovl %5, %2 \n\t"\
76 : "+&r" (x), "+&r" (a), "+r" (c)\
77 : "r" (y), "r" (b), "r" (d)\
78);
79#endif
80
a6493a8f 81#endif /* AVCODEC_X86_MATHOPS_H */