1 | /* |
1 | /* |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
3 | * |
3 | * |
4 | * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de> |
4 | * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> |
5 | * Copyright (©) 2011 Emanuele Giaquinta |
5 | * Copyright (©) 2011 Emanuele Giaquinta |
6 | * All rights reserved. |
6 | * All rights reserved. |
7 | * |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * Redistribution and use in source and binary forms, with or without modifica- |
9 | * tion, are permitted provided that the following conditions are met: |
9 | * tion, are permitted provided that the following conditions are met: |
… | |
… | |
28 | */ |
28 | */ |
29 | |
29 | |
30 | #ifndef ECB_H |
30 | #ifndef ECB_H |
31 | #define ECB_H |
31 | #define ECB_H |
32 | |
32 | |
|
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33 | /* 16 bits major, 16 bits minor */ |
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34 | #define ECB_VERSION 0x00010001 |
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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 |
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|
50 | #ifdef _WIN64 |
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51 | #define ECB_PTRSIZE 8 |
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52 | typedef uint64_t uintptr_t; |
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53 | typedef int64_t intptr_t; |
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54 | #else |
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55 | #define ECB_PTRSIZE 4 |
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56 | typedef uint32_t uintptr_t; |
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57 | typedef int32_t intptr_t; |
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58 | #endif |
47 | #else |
59 | #else |
48 | #include <inttypes.h> |
60 | #include <inttypes.h> |
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61 | #if UINTMAX_MAX > 0xffffffffU |
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62 | #define ECB_PTRSIZE 8 |
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63 | #else |
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64 | #define ECB_PTRSIZE 4 |
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65 | #endif |
49 | #endif |
66 | #endif |
50 | |
67 | |
51 | /* many compilers define _GNUC_ to some versions but then only implement |
68 | /* many compilers define _GNUC_ to some versions but then only implement |
52 | * what their idiot authors think are the "more important" extensions, |
69 | * what their idiot authors think are the "more important" extensions, |
53 | * causing enormous grief in return for some better fake benchmark numbers. |
70 | * causing enormous grief in return for some better fake benchmark numbers. |
54 | * or so. |
71 | * or so. |
55 | * we try to detect these and simply assume they are not gcc - if they have |
72 | * we try to detect these and simply assume they are not gcc - if they have |
56 | * an issue with that they should have done it right in the first place. |
73 | * an issue with that they should have done it right in the first place. |
57 | */ |
74 | */ |
58 | #ifndef ECB_GCC_VERSION |
75 | #ifndef ECB_GCC_VERSION |
59 | #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) |
76 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
60 | #define ECB_GCC_VERSION(major,minor) 0 |
77 | #define ECB_GCC_VERSION(major,minor) 0 |
61 | #else |
78 | #else |
62 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
79 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
63 | #endif |
80 | #endif |
64 | #endif |
81 | #endif |
… | |
… | |
66 | /*****************************************************************************/ |
83 | /*****************************************************************************/ |
67 | |
84 | |
68 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
85 | /* 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 */ |
86 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
70 | |
87 | |
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88 | #if ECB_NO_THREADS |
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89 | # define ECB_NO_SMP 1 |
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90 | #endif |
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91 | |
71 | #if ECB_NO_THREADS || ECB_NO_SMP |
92 | #if ECB_NO_THREADS || ECB_NO_SMP |
72 | #define ECB_MEMORY_FENCE do { } while (0) |
93 | #define ECB_MEMORY_FENCE do { } while (0) |
73 | #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0) |
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74 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) |
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75 | #endif |
94 | #endif |
76 | |
95 | |
77 | #ifndef ECB_MEMORY_FENCE |
96 | #ifndef ECB_MEMORY_FENCE |
78 | #if ECB_GCC_VERSION(2,5) |
97 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
79 | #if __x86 |
98 | #if __i386 || __i386__ |
80 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
99 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
81 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ |
100 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ |
82 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
101 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
83 | #elif __amd64 |
102 | #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ |
84 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
103 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
85 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
104 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
86 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
105 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
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106 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
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107 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
87 | #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ |
108 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
88 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \ |
109 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
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110 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
89 | || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ |
111 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
90 | || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) |
112 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
91 | #define ECB_MEMORY_FENCE \ |
113 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
92 | do { \ |
114 | #elif __sparc || __sparc__ |
93 | int null = 0; \ |
115 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") |
94 | __asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \ |
116 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
95 | while (0) |
117 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
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118 | #elif defined __s390__ || defined __s390x__ |
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119 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
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120 | #elif defined __mips__ |
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121 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
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122 | #elif defined __alpha__ |
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123 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
96 | #endif |
124 | #endif |
97 | #endif |
125 | #endif |
98 | #endif |
126 | #endif |
99 | |
127 | |
100 | #ifndef ECB_MEMORY_FENCE |
128 | #ifndef ECB_MEMORY_FENCE |
101 | #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) |
129 | #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
102 | #define ECB_MEMORY_FENCE __sync_synchronize () |
130 | #define ECB_MEMORY_FENCE __sync_synchronize () |
103 | /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ |
131 | /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ |
104 | /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ |
132 | /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ |
105 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
133 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
106 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
134 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
107 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
135 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
108 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
136 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
109 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
137 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
110 | #elif defined(_WIN32) |
138 | #elif defined _WIN32 |
111 | #include <WinNT.h> |
139 | #include <WinNT.h> |
112 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
140 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
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141 | #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
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142 | #include <mbarrier.h> |
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143 | #define ECB_MEMORY_FENCE __machine_rw_barrier () |
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144 | #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () |
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145 | #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () |
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146 | #elif __xlC__ |
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147 | #define ECB_MEMORY_FENCE __sync () |
113 | #endif |
148 | #endif |
114 | #endif |
149 | #endif |
115 | |
150 | |
116 | #ifndef ECB_MEMORY_FENCE |
151 | #ifndef ECB_MEMORY_FENCE |
117 | #if !ECB_AVOID_PTHREADS |
152 | #if !ECB_AVOID_PTHREADS |
… | |
… | |
129 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
164 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
130 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
165 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
131 | #endif |
166 | #endif |
132 | #endif |
167 | #endif |
133 | |
168 | |
134 | #if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE) |
169 | #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE |
135 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
170 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
136 | #endif |
171 | #endif |
137 | |
172 | |
138 | #if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE) |
173 | #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE |
139 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
174 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
140 | #endif |
175 | #endif |
141 | |
176 | |
142 | /*****************************************************************************/ |
177 | /*****************************************************************************/ |
143 | |
178 | |
… | |
… | |
292 | |
327 | |
293 | return r + ecb_ld32 (x); |
328 | return r + ecb_ld32 (x); |
294 | } |
329 | } |
295 | #endif |
330 | #endif |
296 | |
331 | |
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332 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
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333 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
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334 | { |
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335 | return ( (x * 0x0802U & 0x22110U) |
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336 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
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337 | } |
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338 | |
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339 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; |
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340 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) |
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341 | { |
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342 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
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343 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
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344 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
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345 | x = ( x >> 8 ) | ( x << 8); |
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346 | |
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347 | return x; |
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348 | } |
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349 | |
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350 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; |
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351 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) |
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352 | { |
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353 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
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354 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
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355 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
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356 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
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357 | x = ( x >> 16 ) | ( x << 16); |
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358 | |
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359 | return x; |
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360 | } |
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361 | |
297 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
362 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
298 | /* so for this version we are lazy */ |
363 | /* so for this version we are lazy */ |
299 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
364 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
300 | ecb_function_ int |
365 | ecb_function_ int |
301 | ecb_popcount64 (uint64_t x) |
366 | ecb_popcount64 (uint64_t x) |
… | |
… | |
350 | |
415 | |
351 | #if ECB_GCC_VERSION(4,5) |
416 | #if ECB_GCC_VERSION(4,5) |
352 | #define ecb_unreachable() __builtin_unreachable () |
417 | #define ecb_unreachable() __builtin_unreachable () |
353 | #else |
418 | #else |
354 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
419 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
355 | ecb_function_ void ecb_unreachable (void) ecb_noreturn; |
420 | ecb_inline void ecb_unreachable (void) ecb_noreturn; |
356 | ecb_function_ void ecb_unreachable (void) { } |
421 | ecb_inline void ecb_unreachable (void) { } |
357 | #endif |
422 | #endif |
358 | |
423 | |
359 | /* try to tell the compiler that some condition is definitely true */ |
424 | /* try to tell the compiler that some condition is definitely true */ |
360 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
425 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
361 | |
426 | |
362 | ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; |
427 | ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
363 | ecb_function_ unsigned char |
428 | ecb_inline unsigned char |
364 | ecb_byteorder_helper (void) |
429 | ecb_byteorder_helper (void) |
365 | { |
430 | { |
366 | const uint32_t u = 0x11223344; |
431 | const uint32_t u = 0x11223344; |
367 | return *(unsigned char *)&u; |
432 | return *(unsigned char *)&u; |
368 | } |
433 | } |
369 | |
434 | |
370 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
435 | ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
371 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
436 | ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
372 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
437 | ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
373 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
438 | ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
374 | |
439 | |
375 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
440 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
376 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
441 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
377 | #else |
442 | #else |
378 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
443 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
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444 | #endif |
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445 | |
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446 | #if __cplusplus |
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447 | template<typename T> |
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448 | static inline T ecb_div_rd (T val, T div) |
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449 | { |
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450 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
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451 | } |
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452 | template<typename T> |
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453 | static inline T ecb_div_ru (T val, T div) |
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454 | { |
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455 | return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; |
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456 | } |
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457 | #else |
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458 | #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) |
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459 | #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) |
379 | #endif |
460 | #endif |
380 | |
461 | |
381 | #if ecb_cplusplus_does_not_suck |
462 | #if ecb_cplusplus_does_not_suck |
382 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
463 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
383 | template<typename T, int N> |
464 | template<typename T, int N> |