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Comparing libecb/ecb.h (file contents):
Revision 1.86 by root, Thu Apr 12 04:09:25 2012 UTC vs.
Revision 1.99 by root, Thu Jun 7 21:28:36 2012 UTC

… …
28 */ 28 */
29 29
30#ifndef ECB_H 30#ifndef ECB_H
31#define ECB_H 31#define ECB_H
32 32
33/* 16 bits major, 16 bits minor */
34#define ECB_VERSION 0x00010001
35
33#ifdef _WIN32 36#ifdef _WIN32
34 typedef signed char int8_t; 37 typedef signed char int8_t;
35 typedef unsigned char uint8_t; 38 typedef unsigned char uint8_t;
36 typedef signed short int16_t; 39 typedef signed short int16_t;
37 typedef unsigned short uint16_t; 40 typedef unsigned short uint16_t;
… …
42 typedef unsigned long long uint64_t; 45 typedef unsigned long long uint64_t;
43 #else /* _MSC_VER || __BORLANDC__ */ 46 #else /* _MSC_VER || __BORLANDC__ */
44 typedef signed __int64 int64_t; 47 typedef signed __int64 int64_t;
45 typedef unsigned __int64 uint64_t; 48 typedef unsigned __int64 uint64_t;
46 #endif 49 #endif
50 #ifdef _WIN64
51 #define ECB_PTRSIZE 8
52 typedef uint64_t uintptr_t;
53 typedef int64_t intptr_t;
54 #else
55 #define ECB_PTRSIZE 4
56 typedef uint32_t uintptr_t;
57 typedef int32_t intptr_t;
58 #endif
59 typedef intptr_t ptrdiff_t;
47#else 60#else
48 #include <inttypes.h> 61 #include <inttypes.h>
62 #if UINTMAX_MAX > 0xffffffffU
63 #define ECB_PTRSIZE 8
64 #else
65 #define ECB_PTRSIZE 4
66 #endif
49#endif 67#endif
50 68
51/* many compilers define _GNUC_ to some versions but then only implement 69/* many compilers define _GNUC_ to some versions but then only implement
52 * what their idiot authors think are the "more important" extensions, 70 * what their idiot authors think are the "more important" extensions,
53 * causing enormous grief in return for some better fake benchmark numbers. 71 * causing enormous grief in return for some better fake benchmark numbers.
… …
61 #else 79 #else
62 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 80 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63 #endif 81 #endif
64#endif 82#endif
65 83
84#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
85#define ECB_C99 (__STDC_VERSION__ >= 199901L)
86#define ECB_C11 (__STDC_VERSION__ >= 201112L)
87#define ECB_CPP (__cplusplus+0)
88#define ECB_CPP11 (__cplusplus >= 201103L)
89
66/*****************************************************************************/ 90/*****************************************************************************/
67 91
68/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 92/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
69/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ 93/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70 94
71#if ECB_NO_THREADS 95#if ECB_NO_THREADS
72# define ECB_NO_SMP 1 96 #define ECB_NO_SMP 1
73#endif 97#endif
74 98
75#if ECB_NO_THREADS || ECB_NO_SMP 99#if ECB_NO_SMP
76 #define ECB_MEMORY_FENCE do { } while (0) 100 #define ECB_MEMORY_FENCE do { } while (0)
77#endif 101#endif
78 102
79#ifndef ECB_MEMORY_FENCE 103#ifndef ECB_MEMORY_FENCE
80 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 104 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
81 #if __i386 || __i386__ 105 #if __i386 || __i386__
82 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 106 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
83 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 107 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
84 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 108 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
85 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 109 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
86 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 110 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
87 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 111 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
88 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ 112 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
89 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 113 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
90 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 114 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
91 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 115 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
92 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 116 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
93 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 117 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
94 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 118 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
95 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 119 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
96 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 120 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
97 #elif __sparc || __sparc__ 121 #elif __sparc || __sparc__
98 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") 122 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
99 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 123 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
100 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 124 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
101 #elif defined __s390__ || defined __s390x__ 125 #elif defined __s390__ || defined __s390x__
102 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 126 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
103 #elif defined __mips__ 127 #elif defined __mips__
104 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 128 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
105 #elif defined __alpha__ 129 #elif defined __alpha__
106 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") 130 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
131 #elif defined __hppa__
132 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
133 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
134 #elif defined __ia64__
135 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
107 #endif 136 #endif
108 #endif 137 #endif
109#endif 138#endif
110 139
111#ifndef ECB_MEMORY_FENCE 140#ifndef ECB_MEMORY_FENCE
141 #if ECB_GCC_VERSION(4,7)
142 /* see comment below (stdatomic.h) about the C11 memory model. */
143 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
144 #elif defined __clang && __has_feature (cxx_atomic)
145 /* see comment below (stdatomic.h) about the C11 memory model. */
146 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
112 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 147 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
113 #define ECB_MEMORY_FENCE __sync_synchronize () 148 #define ECB_MEMORY_FENCE __sync_synchronize ()
114 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
115 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
116 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 149 #elif _MSC_VER >= 1400 /* VC++ 2005 */
117 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 150 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
118 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 151 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
119 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 152 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
120 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 153 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
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130 #define ECB_MEMORY_FENCE __sync () 163 #define ECB_MEMORY_FENCE __sync ()
131 #endif 164 #endif
132#endif 165#endif
133 166
134#ifndef ECB_MEMORY_FENCE 167#ifndef ECB_MEMORY_FENCE
168 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
169 /* we assume that these memory fences work on all variables/all memory accesses, */
170 /* not just C11 atomics and atomic accesses */
171 #include <stdatomic.h>
172 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
173 /* any fence other than seq_cst, which isn't very efficient for us. */
174 /* Why that is, we don't know - either the C11 memory model is quite useless */
175 /* for most usages, or gcc and clang have a bug */
176 /* I *currently* lean towards the latter, and inefficiently implement */
177 /* all three of ecb's fences as a seq_cst fence */
178 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
179 #endif
180#endif
181
182#ifndef ECB_MEMORY_FENCE
135 #if !ECB_AVOID_PTHREADS 183 #if !ECB_AVOID_PTHREADS
136 /* 184 /*
137 * if you get undefined symbol references to pthread_mutex_lock, 185 * if you get undefined symbol references to pthread_mutex_lock,
138 * or failure to find pthread.h, then you should implement 186 * or failure to find pthread.h, then you should implement
139 * the ECB_MEMORY_FENCE operations for your cpu/compiler 187 * the ECB_MEMORY_FENCE operations for your cpu/compiler
… …
157 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 205 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
158#endif 206#endif
159 207
160/*****************************************************************************/ 208/*****************************************************************************/
161 209
162#define ECB_C99 (__STDC_VERSION__ >= 199901L)
163
164#if __cplusplus 210#if __cplusplus
165 #define ecb_inline static inline 211 #define ecb_inline static inline
166#elif ECB_GCC_VERSION(2,5) 212#elif ECB_GCC_VERSION(2,5)
167 #define ecb_inline static __inline__ 213 #define ecb_inline static __inline__
168#elif ECB_C99 214#elif ECB_C99
… …
206#elif ECB_GCC_VERSION(3,0) 252#elif ECB_GCC_VERSION(3,0)
207 #define ecb_decltype(x) __typeof(x) 253 #define ecb_decltype(x) __typeof(x)
208#endif 254#endif
209 255
210#define ecb_noinline ecb_attribute ((__noinline__)) 256#define ecb_noinline ecb_attribute ((__noinline__))
211#define ecb_noreturn ecb_attribute ((__noreturn__))
212#define ecb_unused ecb_attribute ((__unused__)) 257#define ecb_unused ecb_attribute ((__unused__))
213#define ecb_const ecb_attribute ((__const__)) 258#define ecb_const ecb_attribute ((__const__))
214#define ecb_pure ecb_attribute ((__pure__)) 259#define ecb_pure ecb_attribute ((__pure__))
260
261#if ECB_C11
262 #define ecb_noreturn _Noreturn
263#else
264 #define ecb_noreturn ecb_attribute ((__noreturn__))
265#endif
215 266
216#if ECB_GCC_VERSION(4,3) 267#if ECB_GCC_VERSION(4,3)
217 #define ecb_artificial ecb_attribute ((__artificial__)) 268 #define ecb_artificial ecb_attribute ((__artificial__))
218 #define ecb_hot ecb_attribute ((__hot__)) 269 #define ecb_hot ecb_attribute ((__hot__))
219 #define ecb_cold ecb_attribute ((__cold__)) 270 #define ecb_cold ecb_attribute ((__cold__))
… …
310 361
311 return r + ecb_ld32 (x); 362 return r + ecb_ld32 (x);
312 } 363 }
313#endif 364#endif
314 365
366ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
367ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
368ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
369ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
370
315ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 371ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
316ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 372ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
317{ 373{
318 return ( (x * 0x0802U & 0x22110U) 374 return ( (x * 0x0802U & 0x22110U)
319 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 375 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
… …
409 465
410ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 466ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
411ecb_inline unsigned char 467ecb_inline unsigned char
412ecb_byteorder_helper (void) 468ecb_byteorder_helper (void)
413{ 469{
414 const uint32_t u = 0x11223344; 470 /* the union code still generates code under pressure in gcc, */
415 return *(unsigned char *)&u; 471 /* but less than using pointers, and always seem to */
472 /* successfully return a constant. */
473 /* the reason why we have this horrible preprocessor mess */
474 /* is to avoid it in all cases, at least on common architectures */
475 /* and yes, gcc defines __BYTE_ORDER__, g++ does not */
476#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
477 return 0x44;
478#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
479 return 0x44;
480#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
481 retrurn 0x11;
482#else
483 union
484 {
485 uint32_t i;
486 uint8_t c;
487 } u = { 0x11223344 };
488 return u.c;
489#endif
416} 490}
417 491
418ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 492ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
419ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 493ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
420ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 494ecb_inline ecb_bool ecb_little_endian (void) ecb_const;

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