huffyuvdsp: Enable the altivec code for PPC little-endian as well
[libav.git] / libavcodec / ppc / huffyuvdsp_altivec.c
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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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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"
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29#include "libavutil/cpu.h"
30#include "libavutil/ppc/cpu.h"
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31#include "libavutil/ppc/types_altivec.h"
32#include "libavutil/ppc/util_altivec.h"
33#include "libavcodec/huffyuvdsp.h"
34
b015872c 35#if HAVE_ALTIVEC
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36static void add_bytes_altivec(uint8_t *dst, uint8_t *src, int 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}
b015872c 52#endif /* HAVE_ALTIVEC */
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53
54av_cold void ff_huffyuvdsp_init_ppc(HuffYUVDSPContext *c)
55{
b015872c 56#if HAVE_ALTIVEC
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57 if (!PPC_ALTIVEC(av_get_cpu_flags()))
58 return;
59
0d439fbe 60 c->add_bytes = add_bytes_altivec;
b015872c 61#endif /* HAVE_ALTIVEC */
0d439fbe 62}