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-rw-r--r--lib/lz4/lz4defs.h66
1 files changed, 64 insertions, 2 deletions
diff --git a/lib/lz4/lz4defs.h b/lib/lz4/lz4defs.h
index 43ac31d63f36..abcecdc2d0f2 100644
--- a/lib/lz4/lz4defs.h
+++ b/lib/lz4/lz4defs.h
@@ -22,23 +22,40 @@
22 * Architecture-specific macros 22 * Architecture-specific macros
23 */ 23 */
24#define BYTE u8 24#define BYTE u8
25typedef struct _U16_S { u16 v; } U16_S;
26typedef struct _U32_S { u32 v; } U32_S;
27typedef struct _U64_S { u64 v; } U64_S;
25#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) \ 28#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) \
26 || defined(CONFIG_ARM) && __LINUX_ARM_ARCH__ >= 6 \ 29 || defined(CONFIG_ARM) && __LINUX_ARM_ARCH__ >= 6 \
27 && defined(ARM_EFFICIENT_UNALIGNED_ACCESS) 30 && defined(ARM_EFFICIENT_UNALIGNED_ACCESS)
28typedef struct _U32_S { u32 v; } U32_S;
29typedef struct _U64_S { u64 v; } U64_S;
30 31
32#define A16(x) (((U16_S *)(x))->v)
31#define A32(x) (((U32_S *)(x))->v) 33#define A32(x) (((U32_S *)(x))->v)
32#define A64(x) (((U64_S *)(x))->v) 34#define A64(x) (((U64_S *)(x))->v)
33 35
34#define PUT4(s, d) (A32(d) = A32(s)) 36#define PUT4(s, d) (A32(d) = A32(s))
35#define PUT8(s, d) (A64(d) = A64(s)) 37#define PUT8(s, d) (A64(d) = A64(s))
38#define LZ4_WRITE_LITTLEENDIAN_16(p, v) \
39 do { \
40 A16(p) = v; \
41 p += 2; \
42 } while (0)
36#else /* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */ 43#else /* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */
37 44
45#define A64(x) get_unaligned((u64 *)&(((U16_S *)(x))->v))
46#define A32(x) get_unaligned((u32 *)&(((U16_S *)(x))->v))
47#define A16(x) get_unaligned((u16 *)&(((U16_S *)(x))->v))
48
38#define PUT4(s, d) \ 49#define PUT4(s, d) \
39 put_unaligned(get_unaligned((const u32 *) s), (u32 *) d) 50 put_unaligned(get_unaligned((const u32 *) s), (u32 *) d)
40#define PUT8(s, d) \ 51#define PUT8(s, d) \
41 put_unaligned(get_unaligned((const u64 *) s), (u64 *) d) 52 put_unaligned(get_unaligned((const u64 *) s), (u64 *) d)
53
54#define LZ4_WRITE_LITTLEENDIAN_16(p, v) \
55 do { \
56 put_unaligned(v, (u16 *)(p)); \
57 p += 2; \
58 } while (0)
42#endif 59#endif
43 60
44#define COPYLENGTH 8 61#define COPYLENGTH 8
@@ -46,6 +63,29 @@ typedef struct _U64_S { u64 v; } U64_S;
46#define ML_MASK ((1U << ML_BITS) - 1) 63#define ML_MASK ((1U << ML_BITS) - 1)
47#define RUN_BITS (8 - ML_BITS) 64#define RUN_BITS (8 - ML_BITS)
48#define RUN_MASK ((1U << RUN_BITS) - 1) 65#define RUN_MASK ((1U << RUN_BITS) - 1)
66#define MEMORY_USAGE 14
67#define MINMATCH 4
68#define SKIPSTRENGTH 6
69#define LASTLITERALS 5
70#define MFLIMIT (COPYLENGTH + MINMATCH)
71#define MINLENGTH (MFLIMIT + 1)
72#define MAXD_LOG 16
73#define MAXD (1 << MAXD_LOG)
74#define MAXD_MASK (u32)(MAXD - 1)
75#define MAX_DISTANCE (MAXD - 1)
76#define HASH_LOG (MAXD_LOG - 1)
77#define HASHTABLESIZE (1 << HASH_LOG)
78#define MAX_NB_ATTEMPTS 256
79#define OPTIMAL_ML (int)((ML_MASK-1)+MINMATCH)
80#define LZ4_64KLIMIT ((1<<16) + (MFLIMIT - 1))
81#define HASHLOG64K ((MEMORY_USAGE - 2) + 1)
82#define HASH64KTABLESIZE (1U << HASHLOG64K)
83#define LZ4_HASH_VALUE(p) (((A32(p)) * 2654435761U) >> \
84 ((MINMATCH * 8) - (MEMORY_USAGE-2)))
85#define LZ4_HASH64K_VALUE(p) (((A32(p)) * 2654435761U) >> \
86 ((MINMATCH * 8) - HASHLOG64K))
87#define HASH_VALUE(p) (((A32(p)) * 2654435761U) >> \
88 ((MINMATCH * 8) - HASH_LOG))
49 89
50#if LZ4_ARCH64/* 64-bit */ 90#if LZ4_ARCH64/* 64-bit */
51#define STEPSIZE 8 91#define STEPSIZE 8
@@ -65,6 +105,13 @@ typedef struct _U64_S { u64 v; } U64_S;
65 LZ4_WILDCOPY(s, d, e); \ 105 LZ4_WILDCOPY(s, d, e); \
66 } \ 106 } \
67 } while (0) 107 } while (0)
108#define HTYPE u32
109
110#ifdef __BIG_ENDIAN
111#define LZ4_NBCOMMONBYTES(val) (__builtin_clzll(val) >> 3)
112#else
113#define LZ4_NBCOMMONBYTES(val) (__builtin_ctzll(val) >> 3)
114#endif
68 115
69#else /* 32-bit */ 116#else /* 32-bit */
70#define STEPSIZE 4 117#define STEPSIZE 4
@@ -83,6 +130,14 @@ typedef struct _U64_S { u64 v; } U64_S;
83 } while (0) 130 } while (0)
84 131
85#define LZ4_SECURECOPY LZ4_WILDCOPY 132#define LZ4_SECURECOPY LZ4_WILDCOPY
133#define HTYPE const u8*
134
135#ifdef __BIG_ENDIAN
136#define LZ4_NBCOMMONBYTES(val) (__builtin_clz(val) >> 3)
137#else
138#define LZ4_NBCOMMONBYTES(val) (__builtin_ctz(val) >> 3)
139#endif
140
86#endif 141#endif
87 142
88#define LZ4_READ_LITTLEENDIAN_16(d, s, p) \ 143#define LZ4_READ_LITTLEENDIAN_16(d, s, p) \
@@ -92,3 +147,10 @@ typedef struct _U64_S { u64 v; } U64_S;
92 do { \ 147 do { \
93 LZ4_COPYPACKET(s, d); \ 148 LZ4_COPYPACKET(s, d); \
94 } while (d < e) 149 } while (d < e)
150
151#define LZ4_BLINDCOPY(s, d, l) \
152 do { \
153 u8 *e = (d) + l; \
154 LZ4_WILDCOPY(s, d, e); \
155 d = e; \
156 } while (0)