FFmpeg
intreadwrite.h
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1 /*
2  * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVUTIL_TOMI_INTREADWRITE_H
22 #define AVUTIL_TOMI_INTREADWRITE_H
23 
24 #include <stdint.h>
25 
26 #include "config.h"
27 #include "libavutil/attributes.h"
28 
29 #define AV_RB16 AV_RB16
30 static av_always_inline uint16_t AV_RB16(const void *p)
31 {
32  uint16_t v;
33  __asm__ ("loadacc, (%1+) \n\t"
34  "rol8 \n\t"
35  "storeacc, %0 \n\t"
36  "loadacc, (%1+) \n\t"
37  "add, %0 \n\t"
38  : "=r"(v), "+a"(p));
39  return v;
40 }
41 
42 #define AV_WB16 AV_WB16
43 static av_always_inline void AV_WB16(void *p, uint16_t v)
44 {
45  __asm__ volatile ("loadacc, %1 \n\t"
46  "lsr8 \n\t"
47  "storeacc, (%0+) \n\t"
48  "loadacc, %1 \n\t"
49  "storeacc, (%0+) \n\t"
50  : "+&a"(p) : "r"(v));
51 }
52 
53 #define AV_RL16 AV_RL16
54 static av_always_inline uint16_t AV_RL16(const void *p)
55 {
56  uint16_t v;
57  __asm__ ("loadacc, (%1+) \n\t"
58  "storeacc, %0 \n\t"
59  "loadacc, (%1+) \n\t"
60  "rol8 \n\t"
61  "add, %0 \n\t"
62  : "=r"(v), "+a"(p));
63  return v;
64 }
65 
66 #define AV_WL16 AV_WL16
67 static av_always_inline void AV_WL16(void *p, uint16_t v)
68 {
69  __asm__ volatile ("loadacc, %1 \n\t"
70  "storeacc, (%0+) \n\t"
71  "lsr8 \n\t"
72  "storeacc, (%0+) \n\t"
73  : "+&a"(p) : "r"(v));
74 }
75 
76 #define AV_RB32 AV_RB32
77 static av_always_inline uint32_t AV_RB32(const void *p)
78 {
79  uint32_t v;
80  __asm__ ("loadacc, (%1+) \n\t"
81  "rol8 \n\t"
82  "rol8 \n\t"
83  "rol8 \n\t"
84  "storeacc, %0 \n\t"
85  "loadacc, (%1+) \n\t"
86  "rol8 \n\t"
87  "rol8 \n\t"
88  "add, %0 \n\t"
89  "loadacc, (%1+) \n\t"
90  "rol8 \n\t"
91  "add, %0 \n\t"
92  "loadacc, (%1+) \n\t"
93  "add, %0 \n\t"
94  : "=r"(v), "+a"(p));
95  return v;
96 }
97 
98 #define AV_WB32 AV_WB32
99 static av_always_inline void AV_WB32(void *p, uint32_t v)
100 {
101  __asm__ volatile ("loadacc, #4 \n\t"
102  "add, %0 \n\t"
103  "loadacc, %1 \n\t"
104  "storeacc, (-%0) \n\t"
105  "lsr8 \n\t"
106  "storeacc, (-%0) \n\t"
107  "lsr8 \n\t"
108  "storeacc, (-%0) \n\t"
109  "lsr8 \n\t"
110  "storeacc, (-%0) \n\t"
111  : "+&a"(p) : "r"(v));
112 }
113 
114 #define AV_RL32 AV_RL32
115 static av_always_inline uint32_t AV_RL32(const void *p)
116 {
117  uint32_t v;
118  __asm__ ("loadacc, (%1+) \n\t"
119  "storeacc, %0 \n\t"
120  "loadacc, (%1+) \n\t"
121  "rol8 \n\t"
122  "add, %0 \n\t"
123  "loadacc, (%1+) \n\t"
124  "rol8 \n\t"
125  "rol8 \n\t"
126  "add, %0 \n\t"
127  "loadacc, (%1+) \n\t"
128  "rol8 \n\t"
129  "rol8 \n\t"
130  "rol8 \n\t"
131  "add, %0 \n\t"
132  : "=r"(v), "+a"(p));
133  return v;
134 }
135 
136 #define AV_WL32 AV_WL32
137 static av_always_inline void AV_WL32(void *p, uint32_t v)
138 {
139  __asm__ volatile ("loadacc, %1 \n\t"
140  "storeacc, (%0+) \n\t"
141  "lsr8 \n\t"
142  "storeacc, (%0+) \n\t"
143  "lsr8 \n\t"
144  "storeacc, (%0+) \n\t"
145  "lsr8 \n\t"
146  "storeacc, (%0+) \n\t"
147  : "+&a"(p) : "r"(v));
148 }
149 
150 #endif /* AVUTIL_TOMI_INTREADWRITE_H */
#define AV_RB16
Definition: intreadwrite.h:29
Macro definitions for various function/variable attributes.
#define AV_WB32
Definition: intreadwrite.h:98
#define AV_RB32
Definition: intreadwrite.h:76
#define AV_RL32
Definition: intreadwrite.h:114
#define AV_WB16
Definition: intreadwrite.h:42
#define AV_RL16
Definition: intreadwrite.h:53
#define AV_WL16
Definition: intreadwrite.h:66
#define AV_WL32
Definition: intreadwrite.h:136
#define av_always_inline
Definition: attributes.h:39