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1 | /* |
2 | * simple math operations | |
3 | * Copyright (c) 2001, 2002 Fabrice Bellard | |
4 | * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #ifndef AVCODEC_PPC_MATHOPS_H | |
24 | #define AVCODEC_PPC_MATHOPS_H | |
25 | ||
26 | #include <stdint.h> | |
27 | #include "config.h" | |
28 | #include "libavutil/common.h" | |
29 | ||
30 | #if HAVE_PPC4XX | |
31 | /* signed 16x16 -> 32 multiply add accumulate */ | |
32 | #define MAC16(rt, ra, rb) \ | |
33 | __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb)); | |
34 | ||
35 | /* signed 16x16 -> 32 multiply */ | |
36 | #define MUL16(ra, rb) \ | |
37 | ({ int __rt; \ | |
38 | __asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \ | |
39 | __rt; }) | |
40 | #endif | |
41 | ||
42 | #define MULH MULH | |
43 | static inline av_const int MULH(int a, int b){ | |
44 | int r; | |
45 | __asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); | |
46 | return r; | |
47 | } | |
48 | ||
49 | #if !ARCH_PPC64 | |
50 | static inline av_const int64_t MAC64(int64_t d, int a, int b) | |
51 | { | |
52 | union { uint64_t x; unsigned hl[2]; } x = { d }; | |
53 | int h, l; | |
54 | __asm__ ("mullw %3, %4, %5 \n\t" | |
55 | "mulhw %2, %4, %5 \n\t" | |
56 | "addc %1, %1, %3 \n\t" | |
57 | "adde %0, %0, %2 \n\t" | |
58 | : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l) | |
59 | : "r"(a), "r"(b)); | |
60 | return x.x; | |
61 | } | |
62 | #define MAC64(d, a, b) ((d) = MAC64(d, a, b)) | |
63 | ||
64 | static inline av_const int64_t MLS64(int64_t d, int a, int b) | |
65 | { | |
66 | union { uint64_t x; unsigned hl[2]; } x = { d }; | |
67 | int h, l; | |
68 | __asm__ ("mullw %3, %4, %5 \n\t" | |
69 | "mulhw %2, %4, %5 \n\t" | |
70 | "subfc %1, %3, %1 \n\t" | |
71 | "subfe %0, %2, %0 \n\t" | |
72 | : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l) | |
73 | : "r"(a), "r"(b)); | |
74 | return x.x; | |
75 | } | |
76 | #define MLS64(d, a, b) ((d) = MLS64(d, a, b)) | |
77 | #endif | |
78 | ||
79 | #endif /* AVCODEC_PPC_MATHOPS_H */ |