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_ARM_INTMATH_H
22 #define AVUTIL_ARM_INTMATH_H
23
24 #include <stdint.h>
25
26 #include "config.h"
27 #include "libavutil/attributes.h"
28
29 #if HAVE_INLINE_ASM
30
31 #if HAVE_ARMV6_INLINE
32
33 #define av_clip_uint8 av_clip_uint8_arm
av_clip_uint8_arm(int a)34 static av_always_inline av_const int av_clip_uint8_arm(int a)
35 {
36 int x;
37 __asm__ ("usat %0, #8, %1" : "=r"(x) : "r"(a));
38 return x;
39 }
40
41 #define av_clip_int8 av_clip_int8_arm
av_clip_int8_arm(int a)42 static av_always_inline av_const int av_clip_int8_arm(int a)
43 {
44 int x;
45 __asm__ ("ssat %0, #8, %1" : "=r"(x) : "r"(a));
46 return x;
47 }
48
49 #define av_clip_uint16 av_clip_uint16_arm
av_clip_uint16_arm(int a)50 static av_always_inline av_const int av_clip_uint16_arm(int a)
51 {
52 int x;
53 __asm__ ("usat %0, #16, %1" : "=r"(x) : "r"(a));
54 return x;
55 }
56
57 #define av_clip_int16 av_clip_int16_arm
av_clip_int16_arm(int a)58 static av_always_inline av_const int av_clip_int16_arm(int a)
59 {
60 int x;
61 __asm__ ("ssat %0, #16, %1" : "=r"(x) : "r"(a));
62 return x;
63 }
64
65 #define av_clip_intp2 av_clip_intp2_arm
av_clip_intp2_arm(int a,int p)66 static av_always_inline av_const int av_clip_intp2_arm(int a, int p)
67 {
68 unsigned x;
69 __asm__ ("ssat %0, %2, %1" : "=r"(x) : "r"(a), "i"(p+1));
70 return x;
71 }
72
73 #define av_clip_uintp2 av_clip_uintp2_arm
av_clip_uintp2_arm(int a,int p)74 static av_always_inline av_const unsigned av_clip_uintp2_arm(int a, int p)
75 {
76 unsigned x;
77 __asm__ ("usat %0, %2, %1" : "=r"(x) : "r"(a), "i"(p));
78 return x;
79 }
80
81 #define av_sat_add32 av_sat_add32_arm
av_sat_add32_arm(int a,int b)82 static av_always_inline int av_sat_add32_arm(int a, int b)
83 {
84 int r;
85 __asm__ ("qadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
86 return r;
87 }
88
89 #define av_sat_dadd32 av_sat_dadd32_arm
av_sat_dadd32_arm(int a,int b)90 static av_always_inline int av_sat_dadd32_arm(int a, int b)
91 {
92 int r;
93 __asm__ ("qdadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
94 return r;
95 }
96
97 #define av_sat_sub32 av_sat_sub32_arm
av_sat_sub32_arm(int a,int b)98 static av_always_inline int av_sat_sub32_arm(int a, int b)
99 {
100 int r;
101 __asm__ ("qsub %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
102 return r;
103 }
104
105 #define av_sat_dsub32 av_sat_dsub32_arm
av_sat_dsub32_arm(int a,int b)106 static av_always_inline int av_sat_dsub32_arm(int a, int b)
107 {
108 int r;
109 __asm__ ("qdsub %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
110 return r;
111 }
112
113 #endif /* HAVE_ARMV6_INLINE */
114
115 #if HAVE_ASM_MOD_Q
116
117 #define av_clipl_int32 av_clipl_int32_arm
av_clipl_int32_arm(int64_t a)118 static av_always_inline av_const int32_t av_clipl_int32_arm(int64_t a)
119 {
120 int x, y;
121 __asm__ ("adds %1, %R2, %Q2, lsr #31 \n\t"
122 "itet ne \n\t"
123 "mvnne %1, #1<<31 \n\t"
124 "moveq %0, %Q2 \n\t"
125 "eorne %0, %1, %R2, asr #31 \n\t"
126 : "=r"(x), "=&r"(y) : "r"(a) : "cc");
127 return x;
128 }
129
130 #endif /* HAVE_ASM_MOD_Q */
131
132 #endif /* HAVE_INLINE_ASM */
133
134 #endif /* AVUTIL_ARM_INTMATH_H */
135