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zstandard: vendor python-zstandard 0.11 The upstream source distribution from PyPI was extracted. Unwanted files were removed. The clang-format ignore list was updated to reflect the new source of files. The project contains a vendored copy of zstandard 1.3.8. The old version was 1.3.6. This should result in some minor performance wins. test-check-py3-compat.t was updated to reflect now-passing tests on Python 3.8. Some HTTP tests were updated to reflect new zstd compression output. # no-check-commit because 3rd party code has different style guidelines Differential Revision: https://phab.mercurial-scm.org/D6199
author Gregory Szorc <gregory.szorc@gmail.com>
date Thu, 04 Apr 2019 17:34:43 -0700
parents 73fef626dae3
children 69de49c4e39c
comparison
equal deleted inserted replaced
42069:668eff08387f 42070:675775c33ab6
13 13
14 /*-******************************************************* 14 /*-*******************************************************
15 * Compiler specifics 15 * Compiler specifics
16 *********************************************************/ 16 *********************************************************/
17 /* force inlining */ 17 /* force inlining */
18
19 #if !defined(ZSTD_NO_INLINE)
18 #if defined (__GNUC__) || defined(__cplusplus) || defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ 20 #if defined (__GNUC__) || defined(__cplusplus) || defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */
19 # define INLINE_KEYWORD inline 21 # define INLINE_KEYWORD inline
20 #else 22 #else
21 # define INLINE_KEYWORD 23 # define INLINE_KEYWORD
22 #endif 24 #endif
25 # define FORCE_INLINE_ATTR __attribute__((always_inline)) 27 # define FORCE_INLINE_ATTR __attribute__((always_inline))
26 #elif defined(_MSC_VER) 28 #elif defined(_MSC_VER)
27 # define FORCE_INLINE_ATTR __forceinline 29 # define FORCE_INLINE_ATTR __forceinline
28 #else 30 #else
29 # define FORCE_INLINE_ATTR 31 # define FORCE_INLINE_ATTR
32 #endif
33
34 #else
35
36 #define INLINE_KEYWORD
37 #define FORCE_INLINE_ATTR
38
30 #endif 39 #endif
31 40
32 /** 41 /**
33 * FORCE_INLINE_TEMPLATE is used to define C "templates", which take constant 42 * FORCE_INLINE_TEMPLATE is used to define C "templates", which take constant
34 * parameters. They must be inlined for the compiler to elimininate the constant 43 * parameters. They must be inlined for the compiler to elimininate the constant
87 # define DYNAMIC_BMI2 0 96 # define DYNAMIC_BMI2 0
88 #endif 97 #endif
89 #endif 98 #endif
90 99
91 /* prefetch 100 /* prefetch
92 * can be disabled, by declaring NO_PREFETCH macro 101 * can be disabled, by declaring NO_PREFETCH build macro */
93 * All prefetch invocations use a single default locality 2,
94 * generating instruction prefetcht1,
95 * which, according to Intel, means "load data into L2 cache".
96 * This is a good enough "middle ground" for the time being,
97 * though in theory, it would be better to specialize locality depending on data being prefetched.
98 * Tests could not determine any sensible difference based on locality value. */
99 #if defined(NO_PREFETCH) 102 #if defined(NO_PREFETCH)
100 # define PREFETCH(ptr) (void)(ptr) /* disabled */ 103 # define PREFETCH_L1(ptr) (void)(ptr) /* disabled */
104 # define PREFETCH_L2(ptr) (void)(ptr) /* disabled */
101 #else 105 #else
102 # if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) /* _mm_prefetch() is not defined outside of x86/x64 */ 106 # if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) /* _mm_prefetch() is not defined outside of x86/x64 */
103 # include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */ 107 # include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */
104 # define PREFETCH(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T1) 108 # define PREFETCH_L1(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T0)
109 # define PREFETCH_L2(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T1)
105 # elif defined(__GNUC__) && ( (__GNUC__ >= 4) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1) ) ) 110 # elif defined(__GNUC__) && ( (__GNUC__ >= 4) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1) ) )
106 # define PREFETCH(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 2 /* locality */) 111 # define PREFETCH_L1(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 3 /* locality */)
112 # define PREFETCH_L2(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 2 /* locality */)
107 # else 113 # else
108 # define PREFETCH(ptr) (void)(ptr) /* disabled */ 114 # define PREFETCH_L1(ptr) (void)(ptr) /* disabled */
115 # define PREFETCH_L2(ptr) (void)(ptr) /* disabled */
109 # endif 116 # endif
110 #endif /* NO_PREFETCH */ 117 #endif /* NO_PREFETCH */
111 118
112 #define CACHELINE_SIZE 64 119 #define CACHELINE_SIZE 64
113 120
114 #define PREFETCH_AREA(p, s) { \ 121 #define PREFETCH_AREA(p, s) { \
115 const char* const _ptr = (const char*)(p); \ 122 const char* const _ptr = (const char*)(p); \
116 size_t const _size = (size_t)(s); \ 123 size_t const _size = (size_t)(s); \
117 size_t _pos; \ 124 size_t _pos; \
118 for (_pos=0; _pos<_size; _pos+=CACHELINE_SIZE) { \ 125 for (_pos=0; _pos<_size; _pos+=CACHELINE_SIZE) { \
119 PREFETCH(_ptr + _pos); \ 126 PREFETCH_L2(_ptr + _pos); \
120 } \ 127 } \
121 } 128 }
122 129
123 /* disable warnings */ 130 /* disable warnings */
124 #ifdef _MSC_VER /* Visual Studio */ 131 #ifdef _MSC_VER /* Visual Studio */