1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/**********************************************************************
Copyright(c) 2019 Arm Corporation All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of Arm Corporation nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**********************************************************************/
#ifndef __HUFFMAN_AARCH64_H__
#define __HUFFMAN_AARCH64_H__
#ifdef __ASSEMBLY__
#ifdef LONGER_HUFFTABLE
#if (D > 8192)
#error History D is larger than 8K
#else
#define DIST_TABLE_SIZE 8192
#define DECODE_OFFSET 26
#endif
#else
#define DIST_TABLE_SIZE 2
#define DECODE_OFFSET 0
#endif
#define LEN_TABLE_SIZE 256
#define LIT_TABLE_SIZE 257
#define DIST_TABLE_START (ISAL_DEF_MAX_HDR_SIZE + 8) //328+8
#define DIST_TABLE_OFFSET (DIST_TABLE_START + - 4 * 1) //336-4
#define LEN_TABLE_OFFSET (DIST_TABLE_START + DIST_TABLE_SIZE * 4 - 4*3) //332 + 2*4 -4*3 =328
#define LIT_TABLE_OFFSET (DIST_TABLE_START + 4 * DIST_TABLE_SIZE + 4 * LEN_TABLE_SIZE)
#define LIT_TABLE_SIZES_OFFSET (LIT_TABLE_OFFSET + 2 * LIT_TABLE_SIZE)
#define DCODE_TABLE_OFFSET (LIT_TABLE_SIZES_OFFSET + LIT_TABLE_SIZE + 1 - DECODE_OFFSET * 2)
#define DCODE_TABLE_SIZE_OFFSET (DCODE_TABLE_OFFSET + 2 * 30 - DECODE_OFFSET)
#define IGZIP_DECODE_OFFSET 0
#define IGZIP_DIST_TABLE_SIZE 2
.macro get_len_code hufftables:req,length:req,code:req,code_len:req,tmp0:req
add x_\tmp0,\hufftables,LEN_TABLE_OFFSET
ldr w_\code_len,[x_\tmp0,x_\length,lsl 2]
lsr w_\code, w_\code_len , 5
and x_\code_len,x_\code_len,0x1f
.endm
.macro get_lit_code hufftables:req,lit:req,code:req,code_len:req
add x_\code,\hufftables,LIT_TABLE_OFFSET
ldrh w_\code,[x_\code,x_\lit,lsl 1]
add x_\code_len,\hufftables,LIT_TABLE_SIZES_OFFSET
ldrb w_\code_len,[x_\code_len,x_\lit]
.endm
.macro get_dist_code hufftables:req,dist:req,code:req,code_len:req,tmp0:req,tmp1:req,tmp2:req
cmp dist,DIST_TABLE_SIZE
bhi _compute_dist_code
add x_\tmp0,\hufftables,DIST_TABLE_OFFSET
ldr w_\code_len,[x_\tmp0,x_\dist,lsl 2]
lsr w_\code, w_\code_len , 5
and x_\code_len,x_\code_len,0x1f
b _end_get_dist_code
_compute_dist_code:
and w_\dist,w_\dist,0xffff
sub w_\dist,w_\dist,1
clz w_\tmp0,w_\dist
mov w_\tmp1,30
sub w_\tmp0,w_\tmp1,w_\tmp0 //tmp0== num_extra_bists
mov w_\tmp1,1
lsl w_\tmp1,w_\tmp1,w_\tmp0
sub w_\tmp1,w_\tmp1,1
and w_\tmp1,w_\tmp1,w_\dist //tmp1=extra_bits
asr w_\dist,w_\dist,w_\tmp0
lsl w_\tmp2,w_\tmp0,1
add w_\tmp2,w_\dist,w_\tmp2 //tmp2=sym
add x_\code,\hufftables,DCODE_TABLE_OFFSET - IGZIP_DECODE_OFFSET*2
add x_\code_len,\hufftables,DCODE_TABLE_SIZE_OFFSET - IGZIP_DECODE_OFFSET
ldrh w_\code,[x_\code,x_\tmp2,lsl 1]
ldrb w_\code_len,[x_\code_len,x_\tmp2]
lsl w_\tmp1,w_\tmp1,w_\code_len
orr w_\code,w_\code,w_\tmp1
add w_\code_len,w_\code_len,w_\tmp0
//compute_dist_code
_end_get_dist_code:
.endm
.macro compare_258_bytes str0:req,str1:req,match_length:req,tmp0:req,tmp1:req
mov x_\match_length,0
_compare_258_loop:
ldr x_\tmp0,[x_\str0,x_\match_length]
ldr x_\tmp1,[x_\str1,x_\match_length]
eor x_\tmp0,x_\tmp1,x_\tmp0
rbit x_\tmp0,x_\tmp0
clz x_\tmp0,x_\tmp0
lsr x_\tmp0,x_\tmp0,3
add x_\match_length,x_\match_length,x_\tmp0
cmp x_\match_length,257
ccmp x_\tmp0,8,0,ls
beq _compare_258_loop
cmp x_\match_length,258
mov x_\tmp1,258
csel x_\match_length,x_\match_length,x_\tmp1,ls
.endm
.macro compare_max_258_bytes str0:req,str1:req,max_length:req,match_length:req,tmp0:req,tmp1:req
mov x_\match_length,0
mov x_\tmp0,258
cmp x_\max_length,x_\tmp0
csel x_\max_length,x_\max_length,x_\tmp0,ls
_compare_258_loop:
ldr x_\tmp0,[x_\str0,x_\match_length]
ldr x_\tmp1,[x_\str1,x_\match_length]
eor x_\tmp0,x_\tmp1,x_\tmp0
rbit x_\tmp0,x_\tmp0
clz x_\tmp0,x_\tmp0
lsr x_\tmp0,x_\tmp0,3
add x_\match_length,x_\match_length,x_\tmp0
cmp x_\max_length,x_\match_length
ccmp x_\tmp0,8,0,hi
beq _compare_258_loop
cmp x_\match_length,x_\max_length
csel x_\match_length,x_\match_length,x_\max_length,ls
.endm
.macro compare_aarch64 str0:req,str1:req,max_length:req,match_length:req,tmp0:req,tmp1:req
mov x_\match_length,0
_compare_loop:
ldr x_\tmp0,[x_\str0,x_\match_length]
ldr x_\tmp1,[x_\str1,x_\match_length]
eor x_\tmp0,x_\tmp1,x_\tmp0
rbit x_\tmp0,x_\tmp0
clz x_\tmp0,x_\tmp0
lsr x_\tmp0,x_\tmp0,3
add x_\match_length,x_\match_length,x_\tmp0
cmp x_\max_length,x_\match_length
ccmp x_\tmp0,8,0,hi
beq _compare_loop
cmp x_\match_length,x_\max_length
csel x_\match_length,x_\match_length,x_\max_length,ls
.endm
#endif
#endif
|
