tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * lzodefs.h -- architecture, OS and compiler specific defines
4 *
5 * Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
6 *
7 * The full LZO package can be found at:
8 * http://www.oberhumer.com/opensource/lzo/
9 *
10 * Changed for Linux kernel use by:
11 * Nitin Gupta <nitingupta910@gmail.com>
12 * Richard Purdie <rpurdie@openedhand.com>
13 */
14
15
16#define COPY4(dst, src) \
17 put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst))
18#if defined(__x86_64__)
19#define COPY8(dst, src) \
20 put_unaligned(get_unaligned((const u64 *)(src)), (u64 *)(dst))
21#else
22#define COPY8(dst, src) \
23 COPY4(dst, src); COPY4((dst) + 4, (src) + 4)
24#endif
25
26#if defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN)
27#error "conflicting endian definitions"
28#elif defined(__x86_64__)
29#define LZO_USE_CTZ64 1
30#define LZO_USE_CTZ32 1
31#elif defined(__i386__) || defined(__powerpc__)
32#define LZO_USE_CTZ32 1
33#elif defined(__arm__) && (__LINUX_ARM_ARCH__ >= 5)
34#define LZO_USE_CTZ32 1
35#endif
36
37#define M1_MAX_OFFSET 0x0400
38#define M2_MAX_OFFSET 0x0800
39#define M3_MAX_OFFSET 0x4000
40#define M4_MAX_OFFSET 0xbfff
41
42#define M1_MIN_LEN 2
43#define M1_MAX_LEN 2
44#define M2_MIN_LEN 3
45#define M2_MAX_LEN 8
46#define M3_MIN_LEN 3
47#define M3_MAX_LEN 33
48#define M4_MIN_LEN 3
49#define M4_MAX_LEN 9
50
51#define M1_MARKER 0
52#define M2_MARKER 64
53#define M3_MARKER 32
54#define M4_MARKER 16
55
56#define lzo_dict_t unsigned short
57#define D_BITS 13
58#define D_SIZE (1u << D_BITS)
59#define D_MASK (D_SIZE - 1)
60#define D_HIGH ((D_MASK >> 1) + 1)