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/*
* lz4defs.h -- architecture specific defines
*
* Copyright (C) 2013, LG Electronics, Kyungsik Lee <kyungsik.lee@lge.com>
*
* 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(__x86_64__) || defined(__x86_64) || defined(__amd64__) \
|| defined(__ppc64__) || defined(__LP64__))
#define LZ4_ARCH64 1
#else
#define LZ4_ARCH64 0
#endif
/*
* Architecture-specific macros
*/
#define BYTE u8
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) \
|| defined(CONFIG_ARM) && __LINUX_ARM_ARCH__ >= 6 \
&& defined(ARM_EFFICIENT_UNALIGNED_ACCESS)
typedef struct _U32_S { u32 v; } U32_S;
typedef struct _U64_S { u64 v; } U64_S;
#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))
#else /* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */
#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)
#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)
#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)
#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
#endif
#define LZ4_READ_LITTLEENDIAN_16(d, s, p) \
(d = s - get_unaligned_le16(p))
#define LZ4_WILDCOPY(s, d, e) \
do { \
LZ4_COPYPACKET(s, d); \
} while (d < e)
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