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lavfi: switch to AVFrame.
[FFMpeg-mirror/mplayer-patches.git] / libavcodec / x86 / cabac.h
bloba74cf0bf1fe80552000a495ce1c838969495d7bc
1 /*
2 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVCODEC_X86_CABAC_H
22 #define AVCODEC_X86_CABAC_H
23
24 #include "libavcodec/cabac.h"
25 #include "libavutil/attributes.h"
26 #include "libavutil/x86/asm.h"
27 #include "libavutil/internal.h"
28 #include "config.h"
29
30 #if HAVE_INLINE_ASM
31
32 #ifdef BROKEN_RELOCATIONS
33 #define TABLES_ARG , "r"(tables)
34
35 #if HAVE_FAST_CMOV
36 #define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
37 "cmp "low" , "tmp" \n\t"\
38 "cmova %%ecx , "range" \n\t"\
39 "sbb %%rcx , %%rcx \n\t"\
40 "and %%ecx , "tmp" \n\t"\
41 "xor %%rcx , "retq" \n\t"\
42 "sub "tmp" , "low" \n\t"
43 #else /* HAVE_FAST_CMOV */
44 #define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
45 /* P4 Prescott has crappy cmov,sbb,64bit shift so avoid them */ \
46 "sub "low" , "tmp" \n\t"\
47 "sar $31 , "tmp" \n\t"\
48 "sub %%ecx , "range" \n\t"\
49 "and "tmp" , "range" \n\t"\
50 "add %%ecx , "range" \n\t"\
51 "shl $17 , %%ecx \n\t"\
52 "and "tmp" , %%ecx \n\t"\
53 "sub %%ecx , "low" \n\t"\
54 "xor "tmp" , "ret" \n\t"\
55 "movslq "ret" , "retq" \n\t"
56 #endif /* HAVE_FAST_CMOV */
57
58 #define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \
59 "movzbl "statep" , "ret" \n\t"\
60 "mov "range" , "tmp" \n\t"\
61 "and $0xC0 , "range" \n\t"\
62 "lea ("ret", "range", 2), %%ecx \n\t"\
63 "movzbl "lps_off"("tables", %%rcx), "range" \n\t"\
64 "sub "range" , "tmp" \n\t"\
65 "mov "tmp" , %%ecx \n\t"\
66 "shl $17 , "tmp" \n\t"\
67 BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
68 "movzbl "norm_off"("tables", "rangeq"), %%ecx \n\t"\
69 "shl %%cl , "range" \n\t"\
70 "movzbl "mlps_off"+128("tables", "retq"), "tmp" \n\t"\
71 "shl %%cl , "low" \n\t"\
72 "mov "tmpbyte" , "statep" \n\t"\
73 "test "lowword" , "lowword" \n\t"\
74 "jnz 2f \n\t"\
75 "mov "byte" , %%"REG_c" \n\t"\
76 "cmp "end" , %%"REG_c" \n\t"\
77 "jge 1f \n\t"\
78 "add"OPSIZE" $2 , "byte" \n\t"\
79 "1: \n\t"\
80 "movzwl (%%"REG_c") , "tmp" \n\t"\
81 "lea -1("low") , %%ecx \n\t"\
82 "xor "low" , %%ecx \n\t"\
83 "shr $15 , %%ecx \n\t"\
84 "bswap "tmp" \n\t"\
85 "shr $15 , "tmp" \n\t"\
86 "movzbl "norm_off"("tables", %%rcx), %%ecx \n\t"\
87 "sub $0xFFFF , "tmp" \n\t"\
88 "neg %%ecx \n\t"\
89 "add $7 , %%ecx \n\t"\
90 "shl %%cl , "tmp" \n\t"\
91 "add "tmp" , "low" \n\t"\
92 "2: \n\t"
93
94 #else /* BROKEN_RELOCATIONS */
95 #define TABLES_ARG
96
97 #if HAVE_FAST_CMOV
98 #define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\
99 "mov "tmp" , %%ecx \n\t"\
100 "shl $17 , "tmp" \n\t"\
101 "cmp "low" , "tmp" \n\t"\
102 "cmova %%ecx , "range" \n\t"\
103 "sbb %%ecx , %%ecx \n\t"\
104 "and %%ecx , "tmp" \n\t"\
105 "xor %%ecx , "ret" \n\t"\
106 "sub "tmp" , "low" \n\t"
107 #else /* HAVE_FAST_CMOV */
108 #define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\
109 "mov "tmp" , %%ecx \n\t"\
110 "shl $17 , "tmp" \n\t"\
111 "sub "low" , "tmp" \n\t"\
112 "sar $31 , "tmp" \n\t" /*lps_mask*/\
113 "sub %%ecx , "range" \n\t" /*RangeLPS - range*/\
114 "and "tmp" , "range" \n\t" /*(RangeLPS - range)&lps_mask*/\
115 "add %%ecx , "range" \n\t" /*new range*/\
116 "shl $17 , %%ecx \n\t"\
117 "and "tmp" , %%ecx \n\t"\
118 "sub %%ecx , "low" \n\t"\
119 "xor "tmp" , "ret" \n\t"
120 #endif /* HAVE_FAST_CMOV */
121
122 #define BRANCHLESS_GET_CABAC(ret, retq, statep, low, lowword, range, rangeq, tmp, tmpbyte, byte, end, norm_off, lps_off, mlps_off, tables) \
123 "movzbl "statep" , "ret" \n\t"\
124 "mov "range" , "tmp" \n\t"\
125 "and $0xC0 , "range" \n\t"\
126 "movzbl "MANGLE(ff_h264_cabac_tables)"+"lps_off"("ret", "range", 2), "range" \n\t"\
127 "sub "range" , "tmp" \n\t"\
128 BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp) \
129 "movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"("range"), %%ecx \n\t"\
130 "shl %%cl , "range" \n\t"\
131 "movzbl "MANGLE(ff_h264_cabac_tables)"+"mlps_off"+128("ret"), "tmp" \n\t"\
132 "shl %%cl , "low" \n\t"\
133 "mov "tmpbyte" , "statep" \n\t"\
134 "test "lowword" , "lowword" \n\t"\
135 " jnz 2f \n\t"\
136 "mov "byte" , %%"REG_c" \n\t"\
137 "cmp "end" , %%"REG_c" \n\t"\
138 "jge 1f \n\t"\
139 "add"OPSIZE" $2 , "byte" \n\t"\
140 "1: \n\t"\
141 "movzwl (%%"REG_c") , "tmp" \n\t"\
142 "lea -1("low") , %%ecx \n\t"\
143 "xor "low" , %%ecx \n\t"\
144 "shr $15 , %%ecx \n\t"\
145 "bswap "tmp" \n\t"\
146 "shr $15 , "tmp" \n\t"\
147 "movzbl "MANGLE(ff_h264_cabac_tables)"+"norm_off"(%%ecx), %%ecx \n\t"\
148 "sub $0xFFFF , "tmp" \n\t"\
149 "neg %%ecx \n\t"\
150 "add $7 , %%ecx \n\t"\
151 "shl %%cl , "tmp" \n\t"\
152 "add "tmp" , "low" \n\t"\
153 "2: \n\t"
154
155 #endif /* BROKEN_RELOCATIONS */
156
157
158 #if HAVE_7REGS
159 #define get_cabac_inline get_cabac_inline_x86
160 static av_always_inline int get_cabac_inline_x86(CABACContext *c,
161 uint8_t *const state)
162 {
163 int bit, tmp;
164 #ifdef BROKEN_RELOCATIONS
165 void *tables;
166
167 __asm__ volatile(
168 "lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
169 : "=&r"(tables)
170 );
171 #endif
172
173 __asm__ volatile(
174 BRANCHLESS_GET_CABAC("%0", "%q0", "(%4)", "%1", "%w1",
175 "%2", "%q2", "%3", "%b3",
176 "%c6(%5)", "%c7(%5)",
177 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
178 AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
179 AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
180 "%8")
181 : "=&r"(bit), "+&r"(c->low), "+&r"(c->range), "=&q"(tmp)
182 : "r"(state), "r"(c),
183 "i"(offsetof(CABACContext, bytestream)),
184 "i"(offsetof(CABACContext, bytestream_end))
185 TABLES_ARG
186 : "%"REG_c, "memory"
187 );
188 return bit & 1;
189 }
190 #endif /* HAVE_7REGS */
191
192 #define get_cabac_bypass_sign get_cabac_bypass_sign_x86
193 static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
194 {
195 x86_reg tmp;
196 __asm__ volatile(
197 "movl %c6(%2), %k1 \n\t"
198 "movl %c3(%2), %%eax \n\t"
199 "shl $17, %k1 \n\t"
200 "add %%eax, %%eax \n\t"
201 "sub %k1, %%eax \n\t"
202 "cltd \n\t"
203 "and %%edx, %k1 \n\t"
204 "add %k1, %%eax \n\t"
205 "xor %%edx, %%ecx \n\t"
206 "sub %%edx, %%ecx \n\t"
207 "test %%ax, %%ax \n\t"
208 "jnz 1f \n\t"
209 "mov %c4(%2), %1 \n\t"
210 "subl $0xFFFF, %%eax \n\t"
211 "movzwl (%1), %%edx \n\t"
212 "bswap %%edx \n\t"
213 "shrl $15, %%edx \n\t"
214 "addl %%edx, %%eax \n\t"
215 "cmp %c5(%2), %1 \n\t"
216 "jge 1f \n\t"
217 "add"OPSIZE" $2, %c4(%2) \n\t"
218 "1: \n\t"
219 "movl %%eax, %c3(%2) \n\t"
220
221 : "+c"(val), "=&r"(tmp)
222 : "r"(c),
223 "i"(offsetof(CABACContext, low)),
224 "i"(offsetof(CABACContext, bytestream)),
225 "i"(offsetof(CABACContext, bytestream_end)),
226 "i"(offsetof(CABACContext, range))
227 : "%eax", "%edx", "memory"
228 );
229 return val;
230 }
231
232 #endif /* HAVE_INLINE_ASM */
233 #endif /* AVCODEC_X86_CABAC_H */
A couple of patches to make building with MPlayer easier