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1 | /* |
2 | * Copyright (c) 2011 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 AVCODEC_ARM_DCA_H | |
22 | #define AVCODEC_ARM_DCA_H | |
23 | ||
24 | #include <stdint.h> | |
25 | ||
26 | #include "config.h" | |
27 | #include "libavcodec/dcadsp.h" | |
28 | #include "libavcodec/mathops.h" | |
29 | ||
30 | #if HAVE_ARMV6_INLINE && AV_GCC_VERSION_AT_LEAST(4,4) && !CONFIG_THUMB | |
31 | ||
32 | #define decode_blockcodes decode_blockcodes | |
33 | static inline int decode_blockcodes(int code1, int code2, int levels, | |
34 | int32_t *values) | |
35 | { | |
36 | int32_t v0, v1, v2, v3, v4, v5; | |
37 | ||
38 | __asm__ ("smmul %0, %6, %10 \n" | |
39 | "smmul %3, %7, %10 \n" | |
40 | "smlabb %6, %0, %9, %6 \n" | |
41 | "smlabb %7, %3, %9, %7 \n" | |
42 | "smmul %1, %0, %10 \n" | |
43 | "smmul %4, %3, %10 \n" | |
44 | "sub %6, %6, %8, lsr #1 \n" | |
45 | "sub %7, %7, %8, lsr #1 \n" | |
46 | "smlabb %0, %1, %9, %0 \n" | |
47 | "smlabb %3, %4, %9, %3 \n" | |
48 | "smmul %2, %1, %10 \n" | |
49 | "smmul %5, %4, %10 \n" | |
50 | "str %6, [%11, #0] \n" | |
51 | "str %7, [%11, #16] \n" | |
52 | "sub %0, %0, %8, lsr #1 \n" | |
53 | "sub %3, %3, %8, lsr #1 \n" | |
54 | "smlabb %1, %2, %9, %1 \n" | |
55 | "smlabb %4, %5, %9, %4 \n" | |
56 | "smmul %6, %2, %10 \n" | |
57 | "smmul %7, %5, %10 \n" | |
58 | "str %0, [%11, #4] \n" | |
59 | "str %3, [%11, #20] \n" | |
60 | "sub %1, %1, %8, lsr #1 \n" | |
61 | "sub %4, %4, %8, lsr #1 \n" | |
62 | "smlabb %2, %6, %9, %2 \n" | |
63 | "smlabb %5, %7, %9, %5 \n" | |
64 | "str %1, [%11, #8] \n" | |
65 | "str %4, [%11, #24] \n" | |
66 | "sub %2, %2, %8, lsr #1 \n" | |
67 | "sub %5, %5, %8, lsr #1 \n" | |
68 | "str %2, [%11, #12] \n" | |
69 | "str %5, [%11, #28] \n" | |
70 | : "=&r"(v0), "=&r"(v1), "=&r"(v2), | |
71 | "=&r"(v3), "=&r"(v4), "=&r"(v5), | |
72 | "+&r"(code1), "+&r"(code2) | |
73 | : "r"(levels - 1), "r"(-levels), | |
74 | "r"(ff_inverse[levels]), "r"(values) | |
75 | : "memory"); | |
76 | ||
77 | return code1 | code2; | |
78 | } | |
79 | ||
80 | #endif | |
81 | ||
82 | #endif /* AVCODEC_ARM_DCA_H */ |