Rename libavcodec/i386/ --> libavcodec/x86/.
[ffmpeg.git] / libavcodec / x86 / h264_i386.h
1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 /**
23  * @file h264_i386.h
24  * H.264 / AVC / MPEG4 part10 codec.
25  * non-MMX i386-specific optimizations for H.264
26  * @author Michael Niedermayer <michaelni@gmx.at>
27  */
28
29 #ifndef AVCODEC_X86_H264_I386_H
30 #define AVCODEC_X86_H264_I386_H
31
32 #include "libavcodec/cabac.h"
33
34 //FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
35 //as that would make optimization work hard)
36 #if defined(ARCH_X86) && defined(HAVE_7REGS)     && \
37     defined(HAVE_EBX_AVAILABLE)                  && \
38     !defined(BROKEN_RELOCATIONS)
39 static int decode_significance_x86(CABACContext *c, int max_coeff,
40                                    uint8_t *significant_coeff_ctx_base,
41                                    int *index){
42     void *end= significant_coeff_ctx_base + max_coeff - 1;
43     int minusstart= -(int)significant_coeff_ctx_base;
44     int minusindex= 4-(int)index;
45     int coeff_count;
46     __asm__ volatile(
47         "movl "RANGE    "(%3), %%esi            \n\t"
48         "movl "LOW      "(%3), %%ebx            \n\t"
49
50         "2:                                     \n\t"
51
52         BRANCHLESS_GET_CABAC("%%edx", "%3", "(%1)", "%%ebx",
53                              "%%bx", "%%esi", "%%eax", "%%al")
54
55         "test $1, %%edx                         \n\t"
56         " jz 3f                                 \n\t"
57
58         BRANCHLESS_GET_CABAC("%%edx", "%3", "61(%1)", "%%ebx",
59                              "%%bx", "%%esi", "%%eax", "%%al")
60
61         "mov  %2, %%"REG_a"                     \n\t"
62         "movl %4, %%ecx                         \n\t"
63         "add  %1, %%"REG_c"                     \n\t"
64         "movl %%ecx, (%%"REG_a")                \n\t"
65
66         "test $1, %%edx                         \n\t"
67         " jnz 4f                                \n\t"
68
69         "add  $4, %%"REG_a"                     \n\t"
70         "mov  %%"REG_a", %2                     \n\t"
71
72         "3:                                     \n\t"
73         "add  $1, %1                            \n\t"
74         "cmp  %5, %1                            \n\t"
75         " jb 2b                                 \n\t"
76         "mov  %2, %%"REG_a"                     \n\t"
77         "movl %4, %%ecx                         \n\t"
78         "add  %1, %%"REG_c"                     \n\t"
79         "movl %%ecx, (%%"REG_a")                \n\t"
80         "4:                                     \n\t"
81         "add  %6, %%eax                         \n\t"
82         "shr $2, %%eax                          \n\t"
83
84         "movl %%esi, "RANGE    "(%3)            \n\t"
85         "movl %%ebx, "LOW      "(%3)            \n\t"
86         :"=&a"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index)
87         :"r"(c), "m"(minusstart), "m"(end), "m"(minusindex)
88         : "%"REG_c, "%ebx", "%edx", "%esi", "memory"
89     );
90     return coeff_count;
91 }
92
93 static int decode_significance_8x8_x86(CABACContext *c,
94                                        uint8_t *significant_coeff_ctx_base,
95                                        int *index, const uint8_t *sig_off){
96     int minusindex= 4-(int)index;
97     int coeff_count;
98     x86_reg last=0;
99     __asm__ volatile(
100         "movl "RANGE    "(%3), %%esi            \n\t"
101         "movl "LOW      "(%3), %%ebx            \n\t"
102
103         "mov %1, %%"REG_D"                      \n\t"
104         "2:                                     \n\t"
105
106         "mov %6, %%"REG_a"                      \n\t"
107         "movzbl (%%"REG_a", %%"REG_D"), %%edi   \n\t"
108         "add %5, %%"REG_D"                      \n\t"
109
110         BRANCHLESS_GET_CABAC("%%edx", "%3", "(%%"REG_D")", "%%ebx",
111                              "%%bx", "%%esi", "%%eax", "%%al")
112
113         "mov %1, %%edi                          \n\t"
114         "test $1, %%edx                         \n\t"
115         " jz 3f                                 \n\t"
116
117         "movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%%edi), %%edi\n\t"
118         "add %5, %%"REG_D"                      \n\t"
119
120         BRANCHLESS_GET_CABAC("%%edx", "%3", "15(%%"REG_D")", "%%ebx",
121                              "%%bx", "%%esi", "%%eax", "%%al")
122
123         "mov %2, %%"REG_a"                      \n\t"
124         "mov %1, %%edi                          \n\t"
125         "movl %%edi, (%%"REG_a")                \n\t"
126
127         "test $1, %%edx                         \n\t"
128         " jnz 4f                                \n\t"
129
130         "add $4, %%"REG_a"                      \n\t"
131         "mov %%"REG_a", %2                      \n\t"
132
133         "3:                                     \n\t"
134         "addl $1, %%edi                         \n\t"
135         "mov %%edi, %1                          \n\t"
136         "cmpl $63, %%edi                        \n\t"
137         " jb 2b                                 \n\t"
138         "mov %2, %%"REG_a"                      \n\t"
139         "movl %%edi, (%%"REG_a")                \n\t"
140         "4:                                     \n\t"
141         "addl %4, %%eax                         \n\t"
142         "shr $2, %%eax                          \n\t"
143
144         "movl %%esi, "RANGE    "(%3)            \n\t"
145         "movl %%ebx, "LOW      "(%3)            \n\t"
146         :"=&a"(coeff_count),"+m"(last), "+m"(index)
147         :"r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off)
148         : "%"REG_c, "%ebx", "%edx", "%esi", "%"REG_D, "memory"
149     );
150     return coeff_count;
151 }
152 #endif /* defined(ARCH_X86) && defined(HAVE_7REGS) &&                 */
153        /* defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
154
155 #endif /* AVCODEC_X86_H264_I386_H */