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) 60