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1 | /* |
2 | * Simple math operations | |
3 | * Copyright (c) 2009 Mans Rullgard <mans@mansr.com> | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
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 | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #ifndef AVCODEC_AVR32_MATHOPS_H | |
23 | #define AVCODEC_AVR32_MATHOPS_H | |
24 | ||
25 | #include <stdint.h> | |
26 | #include "config.h" | |
27 | #include "libavutil/common.h" | |
28 | ||
29 | #if HAVE_INLINE_ASM | |
30 | ||
31 | #define MULL MULL | |
32 | static inline av_const int MULL(int a, int b, unsigned shift) | |
33 | { | |
34 | union { int64_t x; int hl[2]; } x; | |
35 | __asm__ ("muls.d %0, %1, %2 \n\t" | |
36 | "lsr %0, %3 \n\t" | |
37 | "or %0, %0, %m0<<%4 \n\t" | |
38 | : "=r"(x) : "r"(b), "r"(a), "i"(shift), "i"(32-shift)); | |
39 | return x.hl[1]; | |
40 | } | |
41 | ||
42 | #define MULH MULH | |
43 | static inline av_const int MULH(int a, int b) | |
44 | { | |
45 | union { int64_t x; int hl[2]; } x; | |
46 | __asm__ ("muls.d %0, %1, %2" : "=r"(x.x) : "r"(a), "r"(b)); | |
47 | return x.hl[0]; | |
48 | } | |
49 | ||
50 | #define MUL64 MUL64 | |
51 | static inline av_const int64_t MUL64(int a, int b) | |
52 | { | |
53 | int64_t x; | |
54 | __asm__ ("muls.d %0, %1, %2" : "=r"(x) : "r"(a), "r"(b)); | |
55 | return x; | |
56 | } | |
57 | ||
58 | static inline av_const int64_t MAC64(int64_t d, int a, int b) | |
59 | { | |
60 | __asm__ ("macs.d %0, %1, %2" : "+r"(d) : "r"(a), "r"(b)); | |
61 | return d; | |
62 | } | |
63 | #define MAC64(d, a, b) ((d) = MAC64(d, a, b)) | |
64 | #define MLS64(d, a, b) MAC64(d, -(a), b) | |
65 | ||
66 | static inline av_const int MAC16(int d, int a, int b) | |
67 | { | |
68 | __asm__ ("machh.w %0, %1:b, %2:b" : "+r"(d) : "r"(a), "r"(b)); | |
69 | return d; | |
70 | } | |
71 | #define MAC16(d, a, b) ((d) = MAC16(d, a, b)) | |
72 | #define MLS16(d, a, b) MAC16(d, -(a), b) | |
73 | ||
74 | #define MUL16 MUL16 | |
75 | static inline av_const int MUL16(int a, int b) | |
76 | { | |
77 | int d; | |
78 | __asm__ ("mulhh.w %0, %1:b, %2:b" : "=r"(d) : "r"(a), "r"(b)); | |
79 | return d; | |
80 | } | |
81 | ||
82 | #define mid_pred mid_pred | |
83 | static inline av_const int mid_pred(int a, int b, int c) | |
84 | { | |
85 | int m; | |
86 | __asm__ ("mov %0, %2 \n\t" | |
87 | "cp.w %1, %2 \n\t" | |
88 | "movgt %0, %1 \n\t" | |
89 | "movgt %1, %2 \n\t" | |
90 | "cp.w %1, %3 \n\t" | |
91 | "movle %1, %3 \n\t" | |
92 | "cp.w %0, %1 \n\t" | |
93 | "movgt %0, %1 \n\t" | |
94 | : "=&r"(m), "+r"(a) | |
95 | : "r"(b), "r"(c)); | |
96 | return m; | |
97 | } | |
98 | ||
99 | #endif /* HAVE_INLINE_ASM */ | |
100 | ||
101 | #endif /* AVCODEC_AVR32_MATHOPS_H */ |