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cabac.h
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1/*
2 * Loongson SIMD optimized h264chroma
3 *
4 * Copyright (c) 2018 Loongson Technology Corporation Limited
5 * Contributed by Shiyou Yin <yinshiyou-hf@loongson.cn>
6 * Gu Xiwei(guxiwei-hf@loongson.cn)
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#ifndef AVCODEC_MIPS_CABAC_H
26#define AVCODEC_MIPS_CABAC_H
27
28#include "libavutil/attributes.h"
29#include "libavcodec/cabac.h"
30#include "libavutil/mips/mmiutils.h"
31#include "config.h"
32
33#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
34#define get_cabac_inline get_cabac_inline_mips
35static av_always_inline int get_cabac_inline_mips(CABACContext *c,
36 uint8_t * const state){
37 mips_reg tmp0, tmp1, tmp2, bit;
38
39 __asm__ volatile (
40 "lbu %[bit], 0(%[state]) \n\t"
41 "and %[tmp0], %[c_range], 0xC0 \n\t"
42 PTR_SLL "%[tmp0], %[tmp0], 0x01 \n\t"
43 PTR_ADDU "%[tmp0], %[tmp0], %[tables] \n\t"
44 PTR_ADDU "%[tmp0], %[tmp0], %[bit] \n\t"
45 /* tmp1: RangeLPS */
46 "lbu %[tmp1], %[lps_off](%[tmp0]) \n\t"
47
48 PTR_SUBU "%[c_range], %[c_range], %[tmp1] \n\t"
49 PTR_SLL "%[tmp0], %[c_range], 0x11 \n\t"
50 "slt %[tmp2], %[tmp0], %[c_low] \n\t"
51 "beqz %[tmp2], 1f \n\t"
52 "move %[c_range], %[tmp1] \n\t"
53 "not %[bit], %[bit] \n\t"
54 PTR_SUBU "%[c_low], %[c_low], %[tmp0] \n\t"
55
56 "1: \n\t"
57 /* tmp1: *state */
58 PTR_ADDU "%[tmp0], %[tables], %[bit] \n\t"
59 "lbu %[tmp1], %[mlps_off](%[tmp0]) \n\t"
60 /* tmp2: lps_mask */
61 PTR_ADDU "%[tmp0], %[tables], %[c_range] \n\t"
62 "lbu %[tmp2], %[norm_off](%[tmp0]) \n\t"
63
64 "sb %[tmp1], 0(%[state]) \n\t"
65 "and %[bit], %[bit], 0x01 \n\t"
66 PTR_SLL "%[c_range], %[c_range], %[tmp2] \n\t"
67 PTR_SLL "%[c_low], %[c_low], %[tmp2] \n\t"
68
69 "and %[tmp1], %[c_low], %[cabac_mask] \n\t"
70 "bnez %[tmp1], 1f \n\t"
71 PTR_ADDIU "%[tmp0], %[c_low], -0X01 \n\t"
72 "xor %[tmp0], %[c_low], %[tmp0] \n\t"
73 PTR_SRA "%[tmp0], %[tmp0], 0x0f \n\t"
74 PTR_ADDU "%[tmp0], %[tmp0], %[tables] \n\t"
75 /* tmp2: ff_h264_norm_shift[x >> (CABAC_BITS - 1)] */
76 "lbu %[tmp2], %[norm_off](%[tmp0]) \n\t"
77#if HAVE_BIGENDIAN
78 "lhu %[tmp0], 0(%[c_bytestream]) \n\t"
79#else
80 "lhu %[tmp0], 0(%[c_bytestream]) \n\t"
81#if HAVE_MIPS32R2 || HAVE_MIPS64R2
82 "wsbh %[tmp0], %[tmp0] \n\t"
83#else
84 "and %[tmp1], %[tmp0], 0xff00ff00 \n\t"
85 "srl %[tmp1], %[tmp1], 8 \n\t"
86 "and %[tmp0], %[tmp0], 0x00ff00ff \n\t"
87 "sll %[tmp0], %[tmp0], 8 \n\t"
88 "or %[tmp0], %[tmp0], %[tmp1] \n\t"
89#endif
90#endif
91 PTR_SLL "%[tmp0], %[tmp0], 0x01 \n\t"
92 PTR_SUBU "%[tmp0], %[tmp0], %[cabac_mask] \n\t"
93
94 "li %[tmp1], 0x07 \n\t"
95 PTR_SUBU "%[tmp1], %[tmp1], %[tmp2] \n\t"
96 PTR_SLL "%[tmp0], %[tmp0], %[tmp1] \n\t"
97 PTR_ADDU "%[c_low], %[c_low], %[tmp0] \n\t"
98
99#if UNCHECKED_BITSTREAM_READER
100 PTR_ADDIU "%[c_bytestream], %[c_bytestream], 0x02 \n\t"
101#else
102 "slt %[tmp0], %[c_bytestream], %[c_bytestream_end] \n\t"
103 PTR_ADDIU "%[tmp2], %[c_bytestream], 0x02 \n\t"
104#if HAVE_MIPS32R2 || HAVE_MIPS64R2
105 "movn %[c_bytestream], %[tmp2], %[tmp0] \n\t"
106#else
107 "beqz %[tmp0], 2f \n\t"
108 " nop \n\t"
109 "move %[c_bytestream], %[tmp2] \n\t"
110 "2: \n\t"
111#endif
112#endif
113 "1: \n\t"
114 : [bit]"=&r"(bit), [tmp0]"=&r"(tmp0), [tmp1]"=&r"(tmp1), [tmp2]"=&r"(tmp2),
115 [c_range]"+&r"(c->range), [c_low]"+&r"(c->low),
116 [c_bytestream]"+&r"(c->bytestream)
117 : [state]"r"(state), [tables]"r"(ff_h264_cabac_tables),
118#if !UNCHECKED_BITSTREAM_READER
119 [c_bytestream_end]"r"(c->bytestream_end),
120#endif
121 [lps_off]"i"(H264_LPS_RANGE_OFFSET),
122 [mlps_off]"i"(H264_MLPS_STATE_OFFSET + 128),
123 [norm_off]"i"(H264_NORM_SHIFT_OFFSET),
124 [cabac_mask]"r"(CABAC_MASK)
125 : "memory"
126 );
127
128 return bit;
129}
130
131#define get_cabac_bypass get_cabac_bypass_mips
132static av_always_inline int get_cabac_bypass_mips(CABACContext *c)
133{
134 mips_reg tmp0, tmp1;
135 int res = 0;
136 __asm__ volatile(
137 PTR_SLL "%[c_low], %[c_low], 0x01 \n\t"
138 "and %[tmp0], %[c_low], %[cabac_mask] \n\t"
139 "bnez %[tmp0], 1f \n\t"
140#if HAVE_BIGENDIAN
141 "lhu %[tmp1], 0(%[c_bytestream]) \n\t"
142#else
143 "lhu %[tmp1], 0(%[c_bytestream]) \n\t"
144#if HAVE_MIPS32R2 || HAVE_MIPS64R2
145 "wsbh %[tmp1], %[tmp1] \n\t"
146#else
147 "and %[tmp0], %[tmp1], 0xff00ff00 \n\t"
148 "srl %[tmp0], %[tmp0], 8 \n\t"
149 "and %[tmp1], %[tmp1], 0x00ff00ff \n\t"
150 "sll %[tmp1], %[tmp1], 8 \n\t"
151 "or %[tmp1], %[tmp1], %[tmp0] \n\t"
152#endif
153#endif
154 PTR_SLL "%[tmp1], %[tmp1], 0x01 \n\t"
155 PTR_SUBU "%[tmp1], %[tmp1], %[cabac_mask] \n\t"
156 PTR_ADDU "%[c_low], %[c_low], %[tmp1] \n\t"
157#if UNCHECKED_BITSTREAM_READER
158 PTR_ADDIU "%[c_bytestream], %[c_bytestream], 0x02 \n\t"
159#else
160 "slt %[tmp0], %[c_bytestream], %[c_bytestream_end] \n\t"
161 PTR_ADDIU "%[tmp1], %[c_bytestream], 0x02 \n\t"
162#if HAVE_MIPS32R2 || HAVE_MIPS64R2
163 "movn %[c_bytestream], %[tmp1], %[tmp0] \n\t"
164#else
165 "beqz %[tmp0], 2f \n\t"
166 " nop \n\t"
167 "move %[c_bytestream], %[tmp1] \n\t"
168 "2: \n\t"
169#endif
170#endif
171 "1: \n\t"
172 PTR_SLL "%[tmp1], %[c_range], 0x11 \n\t"
173 "slt %[tmp0], %[c_low], %[tmp1] \n\t"
174 PTR_SUBU "%[tmp1], %[c_low], %[tmp1] \n\t"
175#if HAVE_MIPS32R2 || HAVE_MIPS64R2
176 "movz %[res], %[one], %[tmp0] \n\t"
177 "movz %[c_low], %[tmp1], %[tmp0] \n\t"
178#else
179 "bnez %[tmp0], 2f \n\t"
180 " nop \n\t"
181 "move %[res], %[one] \n\t"
182 "move %[c_low], %[tmp1] \n\t"
183 "2: \n\t"
184#endif
185 : [tmp0]"=&r"(tmp0), [tmp1]"=&r"(tmp1), [res]"+&r"(res),
186 [c_range]"+&r"(c->range), [c_low]"+&r"(c->low),
187 [c_bytestream]"+&r"(c->bytestream)
188 : [cabac_mask]"r"(CABAC_MASK),
189#if !UNCHECKED_BITSTREAM_READER
190 [c_bytestream_end]"r"(c->bytestream_end),
191#endif
192 [one]"r"(0x01)
193 : "memory"
194 );
195 return res;
196}
197
198#define get_cabac_bypass_sign get_cabac_bypass_sign_mips
199static av_always_inline int get_cabac_bypass_sign_mips(CABACContext *c, int val)
200{
201 mips_reg tmp0, tmp1;
202 int res = val;
203 __asm__ volatile(
204 PTR_SLL "%[c_low], %[c_low], 0x01 \n\t"
205 "and %[tmp0], %[c_low], %[cabac_mask] \n\t"
206 "bnez %[tmp0], 1f \n\t"
207#if HAVE_BIGENDIAN
208 "lhu %[tmp1], 0(%[c_bytestream]) \n\t"
209#else
210 "lhu %[tmp1], 0(%[c_bytestream]) \n\t"
211#if HAVE_MIPS32R2 || HAVE_MIPS64R2
212 "wsbh %[tmp1], %[tmp1] \n\t"
213#else
214 "and %[tmp0], %[tmp1], 0xff00ff00 \n\t"
215 "srl %[tmp0], %[tmp0], 8 \n\t"
216 "and %[tmp1], %[tmp1], 0x00ff00ff \n\t"
217 "sll %[tmp1], %[tmp1], 8 \n\t"
218 "or %[tmp1], %[tmp1], %[tmp0] \n\t"
219#endif
220#endif
221 PTR_SLL "%[tmp1], %[tmp1], 0x01 \n\t"
222 PTR_SUBU "%[tmp1], %[tmp1], %[cabac_mask] \n\t"
223 PTR_ADDU "%[c_low], %[c_low], %[tmp1] \n\t"
224#if UNCHECKED_BITSTREAM_READER
225 PTR_ADDIU "%[c_bytestream], %[c_bytestream], 0x02 \n\t"
226#else
227 "slt %[tmp0], %[c_bytestream], %[c_bytestream_end] \n\t"
228 PTR_ADDIU "%[tmp1], %[c_bytestream], 0x02 \n\t"
229#if HAVE_MIPS32R2 || HAVE_MIPS64R2
230 "movn %[c_bytestream], %[tmp1], %[tmp0] \n\t"
231#else
232 "beqz %[tmp0], 2f \n\t"
233 " nop \n\t"
234 "move %[c_bytestream], %[tmp1] \n\t"
235 "2: \n\t"
236#endif
237#endif
238 "1: \n\t"
239 PTR_SLL "%[tmp1], %[c_range], 0x11 \n\t"
240 "slt %[tmp0], %[c_low], %[tmp1] \n\t"
241 PTR_SUBU "%[tmp1], %[c_low], %[tmp1] \n\t"
242#if HAVE_MIPS32R2 || HAVE_MIPS64R2
243 "movz %[c_low], %[tmp1], %[tmp0] \n\t"
244#else
245 "bnez %[tmp0], 2f \n\t"
246 " nop \n\t"
247 "move %[c_low], %[tmp1] \n\t"
248 "2: \n\t"
249#endif
250 PTR_SUBU "%[tmp1], %[zero], %[res] \n\t"
251#if HAVE_MIPS32R2 || HAVE_MIPS64R2
252 "movn %[res], %[tmp1], %[tmp0] \n\t"
253#else
254 "beqz %[tmp0], 3f \n\t"
255 " nop \n\t"
256 "move %[res], %[tmp1] \n\t"
257 "3: \n\t"
258#endif
259 : [tmp0]"=&r"(tmp0), [tmp1]"=&r"(tmp1), [res]"+&r"(res),
260 [c_range]"+&r"(c->range), [c_low]"+&r"(c->low),
261 [c_bytestream]"+&r"(c->bytestream)
262 : [cabac_mask]"r"(CABAC_MASK),
263#if !UNCHECKED_BITSTREAM_READER
264 [c_bytestream_end]"r"(c->bytestream_end),
265#endif
266 [zero]"r"(0x0)
267 : "memory"
268 );
269
270 return res;
271}
272#endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
273#endif /* AVCODEC_MIPS_CABAC_H */
val
static double val(void *priv, double ch)
Definition aeval.c:77
PTR_SUBU
#define PTR_SUBU
Definition asmdefs.h:52
PTR_SLL
#define PTR_SLL
Definition asmdefs.h:57
PTR_ADDIU
#define PTR_ADDIU
Definition asmdefs.h:50
mips_reg
#define mips_reg
Definition asmdefs.h:46
PTR_SRA
#define PTR_SRA
Definition asmdefs.h:55
PTR_ADDU
#define PTR_ADDU
Definition asmdefs.h:49
__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")
cabac.h
Context Adaptive Binary Arithmetic Coder.
CABAC_MASK
#define CABAC_MASK
Definition cabac.h:39
H264_LPS_RANGE_OFFSET
#define H264_LPS_RANGE_OFFSET
Definition cabac.h:34
H264_MLPS_STATE_OFFSET
#define H264_MLPS_STATE_OFFSET
Definition cabac.h:35
H264_NORM_SHIFT_OFFSET
#define H264_NORM_SHIFT_OFFSET
Definition cabac.h:33
ff_h264_cabac_tables
const uint8_t ff_h264_cabac_tables[512+4 *2 *64+4 *64+63]
bit
#define bit(string, value)
Definition cbs_mpeg2.c:56
state
static struct @346255127015250356166251341105367306144006377143 state
zero
static int zero(InterplayACMContext *s, unsigned ind, unsigned col)
Definition interplayacm.c:121
attributes.h
Macro definitions for various function/variable attributes.
av_always_inline
#define av_always_inline
Definition attributes.h:72
get_cabac_bypass_mips
static av_always_inline int get_cabac_bypass_mips(CABACContext *c)
Definition cabac.h:132
get_cabac_inline_mips
static av_always_inline int get_cabac_inline_mips(CABACContext *c, uint8_t *const state)
Definition cabac.h:35
get_cabac_bypass_sign_mips
static av_always_inline int get_cabac_bypass_sign_mips(CABACContext *c, int val)
Definition cabac.h:199
tables
static const uint8_t *const tables[]
Definition truemotion1data.h:830
c
static double c[64]
Definition vsrc_mptestsrc.c:89
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