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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_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 | |
34 | static av_always_inline av_const unsigned av_clip_uint8_arm(int a) | |
35 | { | |
36 | unsigned 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 | |
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 | |
50 | static av_always_inline av_const unsigned av_clip_uint16_arm(int a) | |
51 | { | |
52 | unsigned 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 | |
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_uintp2 av_clip_uintp2_arm | |
66 | static av_always_inline av_const unsigned av_clip_uintp2_arm(int a, int p) | |
67 | { | |
68 | unsigned x; | |
69 | __asm__ ("usat %0, %2, %1" : "=r"(x) : "r"(a), "i"(p)); | |
70 | return x; | |
71 | } | |
72 | ||
73 | #define av_sat_add32 av_sat_add32_arm | |
74 | static av_always_inline int av_sat_add32_arm(int a, int b) | |
75 | { | |
76 | int r; | |
77 | __asm__ ("qadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); | |
78 | return r; | |
79 | } | |
80 | ||
81 | #define av_sat_dadd32 av_sat_dadd32_arm | |
82 | static av_always_inline int av_sat_dadd32_arm(int a, int b) | |
83 | { | |
84 | int r; | |
85 | __asm__ ("qdadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); | |
86 | return r; | |
87 | } | |
88 | ||
89 | #endif /* HAVE_ARMV6_INLINE */ | |
90 | ||
91 | #if HAVE_ASM_MOD_Q | |
92 | ||
93 | #define av_clipl_int32 av_clipl_int32_arm | |
94 | static av_always_inline av_const int32_t av_clipl_int32_arm(int64_t a) | |
95 | { | |
96 | int x, y; | |
97 | __asm__ ("adds %1, %R2, %Q2, lsr #31 \n\t" | |
98 | "itet ne \n\t" | |
99 | "mvnne %1, #1<<31 \n\t" | |
100 | "moveq %0, %Q2 \n\t" | |
101 | "eorne %0, %1, %R2, asr #31 \n\t" | |
102 | : "=r"(x), "=&r"(y) : "r"(a) : "cc"); | |
103 | return x; | |
104 | } | |
105 | ||
106 | #endif /* HAVE_ASM_MOD_Q */ | |
107 | ||
108 | #endif /* HAVE_INLINE_ASM */ | |
109 | ||
110 | #endif /* AVUTIL_ARM_INTMATH_H */ |