FFmpeg
videodsp.c
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1 /*
2  * Copyright (c) 2003-2004 Romain Dolbeau
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 #include "libavutil/attributes.h"
22 #include "libavcodec/videodsp.h"
23 
24 static void prefetch_ppc(const uint8_t *mem, ptrdiff_t stride, int h)
25 {
26  register const uint8_t *p = mem;
27  do {
28  __asm__ volatile ("dcbt 0,%0" : : "r" (p));
29  p += stride;
30  } while(--h);
31 }
32 
34 {
35  ctx->prefetch = prefetch_ppc;
36 }
av_cold
#define av_cold
Definition: attributes.h:90
ctx
AVFormatContext * ctx
Definition: movenc.c:49
ff_videodsp_init_ppc
av_cold void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:33
prefetch_ppc
static void prefetch_ppc(const uint8_t *mem, ptrdiff_t stride, int h)
Definition: videodsp.c:24
attributes.h
stride
#define stride
Definition: h264pred_template.c:537
__asm__
__asm__(".macro parse_r var r\n\t" "\\var = -1\n\t" _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) ".iflt \\var\n\t" ".error \"Unable to parse register name \\r\"\n\t" ".endif\n\t" ".endm")
VideoDSPContext
Definition: videodsp.h:40
videodsp.h
h
h
Definition: vp9dsp_template.c:2070