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