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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* 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"
#include "libavutil/x86/asm.h"
#if HAVE_INLINE_ASM
#if ARCH_X86_32
#define MULL MULL
static av_always_inline av_const int MULL(int a, int b, unsigned shift)
{
int rt, dummy;
__asm__ (
"imull %3 \n\t"
"shrdl %4, %%edx, %%eax \n\t"
:"=a"(rt), "=d"(dummy)
:"a"(a), "rm"(b), "ci"((uint8_t)shift)
);
return rt;
}
#define MULH MULH
static av_always_inline av_const int MULH(int a, int b)
{
int rt, dummy;
__asm__ (
"imull %3"
:"=d"(rt), "=a"(dummy)
:"a"(a), "rm"(b)
);
return rt;
}
#define MUL64 MUL64
static av_always_inline av_const int64_t MUL64(int a, int b)
{
int64_t rt;
__asm__ (
"imull %2"
:"=A"(rt)
:"a"(a), "rm"(b)
);
return rt;
}
#endif /* ARCH_X86_32 */
#if HAVE_I686
/* 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__ (
"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;
}
#if HAVE_6REGS
#define COPY3_IF_LT(x, y, a, b, c, d)\
__asm__ volatile(\
"cmpl %0, %3 \n\t"\
"cmovl %3, %0 \n\t"\
"cmovl %4, %1 \n\t"\
"cmovl %5, %2 \n\t"\
: "+&r" (x), "+&r" (a), "+r" (c)\
: "r" (y), "r" (b), "r" (d)\
);
#endif /* HAVE_6REGS */
#endif /* HAVE_I686 */
#define MASK_ABS(mask, level) \
__asm__ ("cltd \n\t" \
"xorl %1, %0 \n\t" \
"subl %1, %0 \n\t" \
: "+a"(level), "=&d"(mask))
// avoid +32 for shift optimization (gcc should do that ...)
#define NEG_SSR32 NEG_SSR32
static inline int32_t NEG_SSR32( int32_t a, int8_t s){
__asm__ ("sarl %1, %0\n\t"
: "+r" (a)
: "ic" ((uint8_t)(-s))
);
return a;
}
#define NEG_USR32 NEG_USR32
static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
__asm__ ("shrl %1, %0\n\t"
: "+r" (a)
: "ic" ((uint8_t)(-s))
);
return a;
}
#endif /* HAVE_INLINE_ASM */
#endif /* AVCODEC_X86_MATHOPS_H */
|
