/* * lz4defs.h -- architecture specific defines * * Copyright (C) 2013, LG Electronics, Kyungsik Lee * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /* * Detects 64 bits mode */ #if defined(CONFIG_64BIT) #define LZ4_ARCH64 1 #else #define LZ4_ARCH64 0 #endif /* * Architecture-specific macros */ #define BYTE u8 typedef struct _U16_S { u16 v; } U16_S; typedef struct _U32_S { u32 v; } U32_S; typedef struct _U64_S { u64 v; } U64_S; #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) #define A16(x) (((U16_S *)(x))->v) #define A32(x) (((U32_S *)(x))->v) #define A64(x) (((U64_S *)(x))->v) #define PUT4(s, d) (A32(d) = A32(s)) #define PUT8(s, d) (A64(d) = A64(s)) #define LZ4_READ_LITTLEENDIAN_16(d, s, p) \ (d = s - A16(p)) #define LZ4_WRITE_LITTLEENDIAN_16(p, v) \ do { \ A16(p) = v; \ p += 2; \ } while (0) #else /* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */ #define A64(x) get_unaligned((u64 *)&(((U16_S *)(x))->v)) #define A32(x) get_unaligned((u32 *)&(((U16_S *)(x))->v)) #define A16(x) get_unaligned((u16 *)&(((U16_S *)(x))->v)) #define PUT4(s, d) \ put_unaligned(get_unaligned((const u32 *) s), (u32 *) d) #define PUT8(s, d) \ put_unaligned(get_unaligned((const u64 *) s), (u64 *) d) #define LZ4_READ_LITTLEENDIAN_16(d, s, p) \ (d = s - get_unaligned_le16(p)) #define LZ4_WRITE_LITTLEENDIAN_16(p, v) \ do { \ put_unaligned_le16(v, (u16 *)(p)); \ p += 2; \ } while (0) #endif #define COPYLENGTH 8 #define ML_BITS 4 #define ML_MASK ((1U << ML_BITS) - 1) #define RUN_BITS (8 - ML_BITS) #define RUN_MASK ((1U << RUN_BITS) - 1) #define MEMORY_USAGE 14 #define MINMATCH 4 #define SKIPSTRENGTH 6 #define LASTLITERALS 5 #define MFLIMIT (COPYLENGTH + MINMATCH) #define MINLENGTH (MFLIMIT + 1) #define MAXD_LOG 16 #define MAXD (1 << MAXD_LOG) #define MAXD_MASK (u32)(MAXD - 1) #define MAX_DISTANCE (MAXD - 1) #define HASH_LOG (MAXD_LOG - 1) #define HASHTABLESIZE (1 << HASH_LOG) #define MAX_NB_ATTEMPTS 256 #define OPTIMAL_ML (int)((ML_MASK-1)+MINMATCH) #define LZ4_64KLIMIT ((1<<16) + (MFLIMIT - 1)) #define HASHLOG64K ((MEMORY_USAGE - 2) + 1) #define HASH64KTABLESIZE (1U << HASHLOG64K) #define LZ4_HASH_VALUE(p) (((A32(p)) * 2654435761U) >> \ ((MINMATCH * 8) - (MEMORY_USAGE-2))) #define LZ4_HASH64K_VALUE(p) (((A32(p)) * 2654435761U) >> \ ((MINMATCH * 8) - HASHLOG64K)) #define HASH_VALUE(p) (((A32(p)) * 2654435761U) >> \ ((MINMATCH * 8) - HASH_LOG)) #if LZ4_ARCH64/* 64-bit */ #define STEPSIZE 8 #define LZ4_COPYSTEP(s, d) \ do { \ PUT8(s, d); \ d += 8; \ s += 8; \ } while (0) #define LZ4_COPYPACKET(s, d) LZ4_COPYSTEP(s, d) #define LZ4_SECURECOPY(s, d, e) \ do { \ if (d < e) { \ LZ4_WILDCOPY(s, d, e); \ } \ } while (0) #define HTYPE u32 #ifdef __BIG_ENDIAN #define LZ4_NBCOMMONBYTES(val) (__builtin_clzll(val) >> 3) #else #define LZ4_NBCOMMONBYTES(val) (__builtin_ctzll(val) >> 3) #endif #else /* 32-bit */ #define STEPSIZE 4 #define LZ4_COPYSTEP(s, d) \ do { \ PUT4(s, d); \ d += 4; \ s += 4; \ } while (0) #define LZ4_COPYPACKET(s, d) \ do { \ LZ4_COPYSTEP(s, d); \ LZ4_COPYSTEP(s, d); \ } while (0) #define LZ4_SECURECOPY LZ4_WILDCOPY #define HTYPE const u8* #ifdef __BIG_ENDIAN #define LZ4_NBCOMMONBYTES(val) (__builtin_clz(val) >> 3) #else #define LZ4_NBCOMMONBYTES(val) (__builtin_ctz(val) >> 3) #endif #endif #define LZ4_WILDCOPY(s, d, e) \ do { \ LZ4_COPYPACKET(s, d); \ } while (d < e) #define LZ4_BLINDCOPY(s, d, l) \ do { \ u8 *e = (d) + l; \ LZ4_WILDCOPY(s, d, e); \ d = e; \ } while (0) 7db0e9ace2c603d492b71d53b5cd'/>


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