| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * lzodefs.h -- architecture, OS and compiler specific defines |
| 3 | * |
| 4 | * Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com> |
| 5 | * |
| 6 | * The full LZO package can be found at: |
| 7 | * http://www.oberhumer.com/opensource/lzo/ |
| 8 | * |
| 9 | * Changed for Linux kernel use by: |
| 10 | * Nitin Gupta <nitingupta910@gmail.com> |
| 11 | * Richard Purdie <rpurdie@openedhand.com> |
| 12 | */ |
| 13 | |
| 14 | |
| 15 | #define COPY4(dst, src) \ |
| 16 | put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst)) |
| 17 | #if defined(__x86_64__) |
| 18 | #define COPY8(dst, src) \ |
| 19 | put_unaligned(get_unaligned((const u64 *)(src)), (u64 *)(dst)) |
| 20 | #else |
| 21 | #define COPY8(dst, src) \ |
| 22 | COPY4(dst, src); COPY4((dst) + 4, (src) + 4) |
| 23 | #endif |
| 24 | |
| 25 | #if defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN) |
| 26 | #error "conflicting endian definitions" |
| 27 | #elif defined(__x86_64__) |
| 28 | #define LZO_USE_CTZ64 1 |
| 29 | #define LZO_USE_CTZ32 1 |
| 30 | #elif defined(__i386__) || defined(__powerpc__) |
| 31 | #define LZO_USE_CTZ32 1 |
| 32 | #elif defined(__arm__) && (__LINUX_ARM_ARCH__ >= 5) |
| 33 | #define LZO_USE_CTZ32 1 |
| 34 | #endif |
| 35 | |
| 36 | #define M1_MAX_OFFSET 0x0400 |
| 37 | #define M2_MAX_OFFSET 0x0800 |
| 38 | #define M3_MAX_OFFSET 0x4000 |
| 39 | #define M4_MAX_OFFSET 0xbfff |
| 40 | |
| 41 | #define M1_MIN_LEN 2 |
| 42 | #define M1_MAX_LEN 2 |
| 43 | #define M2_MIN_LEN 3 |
| 44 | #define M2_MAX_LEN 8 |
| 45 | #define M3_MIN_LEN 3 |
| 46 | #define M3_MAX_LEN 33 |
| 47 | #define M4_MIN_LEN 3 |
| 48 | #define M4_MAX_LEN 9 |
| 49 | |
| 50 | #define M1_MARKER 0 |
| 51 | #define M2_MARKER 64 |
| 52 | #define M3_MARKER 32 |
| 53 | #define M4_MARKER 16 |
| 54 | |
| 55 | #define lzo_dict_t unsigned short |
| 56 | #define D_BITS 13 |
| 57 | #define D_SIZE (1u << D_BITS) |
| 58 | #define D_MASK (D_SIZE - 1) |
| 59 | #define D_HIGH ((D_MASK >> 1) + 1) |