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fpel_mmx.c
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1 /*
2  * MMX-optimized avg/put pixel routines
3  *
4  * Copyright (c) 2000, 2001 Fabrice Bellard
5  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include <stddef.h>
25 #include <stdint.h>
26 
27 #include "config.h"
28 #include "dsputil_x86.h"
29 
30 #if HAVE_MMX_INLINE
31 
32 // in case more speed is needed - unrolling would certainly help
33 void ff_avg_pixels8_mmx(uint8_t *block, const uint8_t *pixels,
34  ptrdiff_t line_size, int h)
35 {
36  MOVQ_BFE(mm6);
37  JUMPALIGN();
38  do {
39  __asm__ volatile(
40  "movq %0, %%mm0 \n\t"
41  "movq %1, %%mm1 \n\t"
42  PAVGB_MMX(%%mm0, %%mm1, %%mm2, %%mm6)
43  "movq %%mm2, %0 \n\t"
44  :"+m"(*block)
45  :"m"(*pixels)
46  :"memory");
47  pixels += line_size;
48  block += line_size;
49  }
50  while (--h);
51 }
52 
53 void ff_avg_pixels16_mmx(uint8_t *block, const uint8_t *pixels,
54  ptrdiff_t line_size, int h)
55 {
56  MOVQ_BFE(mm6);
57  JUMPALIGN();
58  do {
59  __asm__ volatile(
60  "movq %0, %%mm0 \n\t"
61  "movq %1, %%mm1 \n\t"
62  PAVGB_MMX(%%mm0, %%mm1, %%mm2, %%mm6)
63  "movq %%mm2, %0 \n\t"
64  "movq 8%0, %%mm0 \n\t"
65  "movq 8%1, %%mm1 \n\t"
66  PAVGB_MMX(%%mm0, %%mm1, %%mm2, %%mm6)
67  "movq %%mm2, 8%0 \n\t"
68  :"+m"(*block)
69  :"m"(*pixels)
70  :"memory");
71  pixels += line_size;
72  block += line_size;
73  }
74  while (--h);
75 }
76 
77 void ff_put_pixels8_mmx(uint8_t *block, const uint8_t *pixels,
78  ptrdiff_t line_size, int h)
79 {
80  __asm__ volatile (
81  "lea (%3, %3), %%"REG_a" \n\t"
82  ".p2align 3 \n\t"
83  "1: \n\t"
84  "movq (%1 ), %%mm0 \n\t"
85  "movq (%1, %3), %%mm1 \n\t"
86  "movq %%mm0, (%2) \n\t"
87  "movq %%mm1, (%2, %3) \n\t"
88  "add %%"REG_a", %1 \n\t"
89  "add %%"REG_a", %2 \n\t"
90  "movq (%1 ), %%mm0 \n\t"
91  "movq (%1, %3), %%mm1 \n\t"
92  "movq %%mm0, (%2) \n\t"
93  "movq %%mm1, (%2, %3) \n\t"
94  "add %%"REG_a", %1 \n\t"
95  "add %%"REG_a", %2 \n\t"
96  "subl $4, %0 \n\t"
97  "jnz 1b \n\t"
98  : "+g"(h), "+r"(pixels), "+r"(block)
99  : "r"((x86_reg)line_size)
100  : "%"REG_a, "memory"
101  );
102 }
103 
104 void ff_put_pixels16_mmx(uint8_t *block, const uint8_t *pixels,
105  ptrdiff_t line_size, int h)
106 {
107  __asm__ volatile (
108  "lea (%3, %3), %%"REG_a" \n\t"
109  ".p2align 3 \n\t"
110  "1: \n\t"
111  "movq (%1 ), %%mm0 \n\t"
112  "movq 8(%1 ), %%mm4 \n\t"
113  "movq (%1, %3), %%mm1 \n\t"
114  "movq 8(%1, %3), %%mm5 \n\t"
115  "movq %%mm0, (%2) \n\t"
116  "movq %%mm4, 8(%2) \n\t"
117  "movq %%mm1, (%2, %3) \n\t"
118  "movq %%mm5, 8(%2, %3) \n\t"
119  "add %%"REG_a", %1 \n\t"
120  "add %%"REG_a", %2 \n\t"
121  "movq (%1 ), %%mm0 \n\t"
122  "movq 8(%1 ), %%mm4 \n\t"
123  "movq (%1, %3), %%mm1 \n\t"
124  "movq 8(%1, %3), %%mm5 \n\t"
125  "movq %%mm0, (%2) \n\t"
126  "movq %%mm4, 8(%2) \n\t"
127  "movq %%mm1, (%2, %3) \n\t"
128  "movq %%mm5, 8(%2, %3) \n\t"
129  "add %%"REG_a", %1 \n\t"
130  "add %%"REG_a", %2 \n\t"
131  "subl $4, %0 \n\t"
132  "jnz 1b \n\t"
133  : "+g"(h), "+r"(pixels), "+r"(block)
134  : "r"((x86_reg)line_size)
135  : "%"REG_a, "memory"
136  );
137 }
138 
139 #endif /* HAVE_MMX_INLINE */