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hpeldsp_mmx.c
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1 /*
2  * MMX-optimized avg/put pixel routines
3  *
4  * Copyright (c) 2001 Fabrice Bellard
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 <stddef.h>
24 #include <stdint.h>
25 
26 #include "config.h"
27 #include "dsputil_x86.h"
28 
29 #if HAVE_MMX_INLINE
30 
31 void ff_avg_pixels8_x2_mmx(uint8_t *block, const uint8_t *pixels,
32  ptrdiff_t line_size, int h)
33 {
34  MOVQ_BFE(mm6);
35  JUMPALIGN();
36  do {
37  __asm__ volatile(
38  "movq %1, %%mm0 \n\t"
39  "movq 1%1, %%mm1 \n\t"
40  "movq %0, %%mm3 \n\t"
41  PAVGB_MMX(%%mm0, %%mm1, %%mm2, %%mm6)
42  PAVGB_MMX(%%mm3, %%mm2, %%mm0, %%mm6)
43  "movq %%mm0, %0 \n\t"
44  :"+m"(*block)
45  :"m"(*pixels)
46  :"memory");
47  pixels += line_size;
48  block += line_size;
49  } while (--h);
50 }
51 
52 #endif /* HAVE_MMX_INLINE */