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lossless_videodsp_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 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 
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/ppc/cpu.h"
29 
31 
32 #if HAVE_ALTIVEC
33 static void add_bytes_altivec(uint8_t *dst, uint8_t *src, ptrdiff_t w)
34 {
35  register int i;
36  register vector unsigned char vdst, vsrc;
37 
38  /* dst and src are 16 bytes-aligned (guaranteed). */
39  for (i = 0; i + 15 < w; i += 16) {
40  vdst = vec_ld(i, (unsigned char *) dst);
41  vsrc = vec_ld(i, (unsigned char *) src);
42  vdst = vec_add(vsrc, vdst);
43  vec_st(vdst, i, (unsigned char *) dst);
44  }
45  /* If w is not a multiple of 16. */
46  for (; i < w; i++)
47  dst[i] = src[i];
48 }
49 #endif /* HAVE_ALTIVEC */
50 
52 {
53 #if HAVE_ALTIVEC
55  return;
56 
57  c->add_bytes = add_bytes_altivec;
58 #endif /* HAVE_ALTIVEC */
59 }
#define src
Definition: vp8dsp.c:254
Macro definitions for various function/variable attributes.
void(* add_bytes)(uint8_t *dst, uint8_t *src, ptrdiff_t w)
uint8_t
#define av_cold
Definition: attributes.h:82
#define PPC_ALTIVEC(flags)
Definition: cpu.h:26
av_cold void ff_llviddsp_init_ppc(LLVidDSPContext *c)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:92
Contains misc utility macros and inline functions.
static double c[64]