6701524e4a4814469b23b8ebf779515009fb02e7
[deb_ffmpeg.git] / huffyuvdsp_altivec.c
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 }