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1 | /* |
2 | * Copyright (c) 2002 Brian Foley | |
3 | * Copyright (c) 2002 Dieter Shirley | |
4 | * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org> | |
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 | #include "config.h" | |
24 | #if HAVE_ALTIVEC_H | |
25 | #include <altivec.h> | |
26 | #endif | |
27 | ||
28 | #include "libavutil/attributes.h" | |
29 | #include "libavutil/cpu.h" | |
30 | #include "libavutil/ppc/cpu.h" | |
31 | #include "libavutil/ppc/types_altivec.h" | |
32 | #include "libavutil/ppc/util_altivec.h" | |
33 | #include "libavcodec/huffyuvdsp.h" | |
34 | ||
35 | #if HAVE_ALTIVEC | |
36 | static void add_bytes_altivec(uint8_t *dst, uint8_t *src, intptr_t w) | |
37 | { | |
38 | register int i; | |
39 | register vector unsigned char vdst, vsrc; | |
40 | ||
41 | /* dst and src are 16 bytes-aligned (guaranteed). */ | |
42 | for (i = 0; i + 15 < w; i += 16) { | |
43 | vdst = vec_ld(i, (unsigned char *) dst); | |
44 | vsrc = vec_ld(i, (unsigned char *) src); | |
45 | vdst = vec_add(vsrc, vdst); | |
46 | vec_st(vdst, i, (unsigned char *) dst); | |
47 | } | |
48 | /* If w is not a multiple of 16. */ | |
49 | for (; i < w; i++) | |
50 | dst[i] = src[i]; | |
51 | } | |
52 | #endif /* HAVE_ALTIVEC */ | |
53 | ||
54 | av_cold void ff_huffyuvdsp_init_ppc(HuffYUVDSPContext *c) | |
55 | { | |
56 | #if HAVE_ALTIVEC | |
57 | if (!PPC_ALTIVEC(av_get_cpu_flags())) | |
58 | return; | |
59 | ||
60 | c->add_bytes = add_bytes_altivec; | |
61 | #endif /* HAVE_ALTIVEC */ | |
62 | } |