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1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ; Copyright(c) 2011-2016 Intel Corporation All rights reserved. | |
3 | ; | |
4 | ; Redistribution and use in source and binary forms, with or without | |
5 | ; modification, are permitted provided that the following conditions | |
6 | ; are met: | |
7 | ; * Redistributions of source code must retain the above copyright | |
8 | ; notice, this list of conditions and the following disclaimer. | |
9 | ; * Redistributions in binary form must reproduce the above copyright | |
10 | ; notice, this list of conditions and the following disclaimer in | |
11 | ; the documentation and/or other materials provided with the | |
12 | ; distribution. | |
13 | ; * Neither the name of Intel Corporation nor the names of its | |
14 | ; contributors may be used to endorse or promote products derived | |
15 | ; from this software without specific prior written permission. | |
16 | ; | |
17 | ; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
18 | ; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
19 | ; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
20 | ; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
21 | ; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
22 | ; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
23 | ; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
24 | ; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
25 | ; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
26 | ; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
27 | ; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
29 | ||
224ce89b WB |
30 | %include "options.asm" |
31 | ||
7c673cae | 32 | %assign K 1024 |
224ce89b WB |
33 | %assign D IGZIP_HIST_SIZE ;; Amount of history |
34 | %assign LA 18 * 16 ;; Max look-ahead, rounded up to 32 byte boundary | |
35 | %assign BSIZE 2*IGZIP_HIST_SIZE + LA ;; Nominal buffer size | |
7c673cae FG |
36 | |
37 | ;; Constants for stateless compression | |
38 | %define LAST_BYTES_COUNT 3 ;; Bytes to prevent reading out of array bounds | |
39 | %define LA_STATELESS 258 ;; No round up since no data is copied to a buffer | |
40 | ||
f91f0fd5 TL |
41 | %assign IGZIP_LVL0_HASH_SIZE (8 * K) |
42 | %assign IGZIP_HASH8K_HASH_SIZE (8 * K) | |
43 | %assign IGZIP_HASH_HIST_HASH_SIZE IGZIP_HIST_SIZE | |
44 | %assign IGZIP_HASH_MAP_HASH_SIZE IGZIP_HIST_SIZE | |
224ce89b | 45 | |
f91f0fd5 TL |
46 | %xdefine LVL0_HASH_MASK (IGZIP_LVL0_HASH_SIZE - 1) |
47 | %xdefine HASH8K_HASH_MASK (IGZIP_HASH8K_HASH_SIZE - 1) | |
48 | %xdefine HASH_HIST_HASH_MASK (IGZIP_HASH_HIST_HASH_SIZE - 1) | |
49 | %xdefine HASH_MAP_HASH_MASK (IGZIP_HASH_MAP_HASH_SIZE - 1) | |
7c673cae | 50 | |
f91f0fd5 | 51 | %assign MIN_DEF_MATCH 3 ; Minimum length of a match in deflate |
224ce89b | 52 | %assign SHORTEST_MATCH 4 |
7c673cae FG |
53 | |
54 | %assign SLOP 8 | |
224ce89b | 55 | |
f91f0fd5 | 56 | %define ICF_CODE_BYTES 4 |
224ce89b WB |
57 | %define LIT_LEN_BIT_COUNT 10 |
58 | %define DIST_LIT_BIT_COUNT 9 | |
59 | ||
f91f0fd5 TL |
60 | %define LIT_LEN_MASK ((1 << LIT_LEN_BIT_COUNT) - 1) |
61 | %define LIT_DIST_MASK ((1 << DIST_LIT_BIT_COUNT) - 1) | |
62 | ||
224ce89b WB |
63 | %define DIST_OFFSET LIT_LEN_BIT_COUNT |
64 | %define EXTRA_BITS_OFFSET (DIST_OFFSET + DIST_LIT_BIT_COUNT) | |
65 | %define LIT (0x1E << DIST_OFFSET) |