[ViewVC] Diff of: cvs/libecb/ecb.h

Comparing libecb/ecb.h (file contents):
Revision 1.50 by root, Fri Jun 17 21:16:11 2011 UTC vs.
Revision 1.81 by root, Fri Mar 23 19:04:07 2012 UTC

…		…
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:
38	typedef signed int int32_t;	38	typedef signed int int32_t;
39	typedef unsigned int uint32_t;	39	typedef unsigned int uint32_t;
40	#if __GNUC__	40	#if __GNUC__
41	typedef signed long long int64_t;	41	typedef signed long long int64_t;
42	typedef unsigned long long uint64_t;	42	typedef unsigned long long uint64_t;
43	#else	43	#else /* _MSC_VER \|\| __BORLANDC__ */
44	typedef signed __int64 int64_t;	44	typedef signed __int64 int64_t;
45	typedef unsigned __int64 uint64_t;	45	typedef unsigned __int64 uint64_t;
46	#endif	46	#endif
47	#else	47	#else
48	#include <inttypes.h>	48	#include <inttypes.h>
49	#endif	49	#endif
50		50
51	/* many compilers define _GNUC_ to some versions but then only implement	51	/* many compilers define _GNUC_ to some versions but then only implement
52	* what their idiot authors think are the "more important" extensions,	52	* what their idiot authors think are the "more important" extensions,
53	* causing enourmous grief in return for some better fake benchmark numbers.	53	* causing enormous grief in return for some better fake benchmark numbers.
54	* or so.	54	* or so.
55	* we try to detect these and simply assume they are not gcc - if they have	55	* 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.	56	* an issue with that they should have done it right in the first place.
57	*/	57	*/
58	#ifndef ECB_GCC_VERSION	58	#ifndef ECB_GCC_VERSION
…		…
61	#else	61	#else
62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63	#endif	63	#endif
64	#endif	64	#endif
65		65
		66	/*****************************************************************************/
		67
		68	/* 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 */
		70
		71	#if ECB_NO_THREADS
		72	# define ECB_NO_SMP 1
		73	#endif
		74
		75	#if ECB_NO_THREADS \|\| ECB_NO_SMP
		76	#define ECB_MEMORY_FENCE do { } while (0)
		77	#endif
		78
		79	#ifndef ECB_MEMORY_FENCE
		80	#if ECB_GCC_VERSION(2,5) \|\| defined(__INTEL_COMPILER) \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		81	#if __i386 \|\| __i386__
		82	#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 */
		84	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		85	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
		86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		87	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		88	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		89	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		90	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		91	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \
		92	\|\| 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")
		94	#elif defined(__ARM_ARCH_7__ ) \|\| defined(__ARM_ARCH_7A__ ) \
		95	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )
		96	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		97	#elif __sparc \|\| __sparc__
		98	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")
		99	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		100	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		101	#elif defined(__s390__) \|\| defined(__s390x__)
		102	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		103	#elif defined(__mips__)
		104	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		105	#elif __xlC__
		106	#define ECB_MEMORY_FENCE __lwsync ()
		107	#endif
		108	#endif
		109	#endif
		110
		111	#ifndef ECB_MEMORY_FENCE
		112	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER) \|\| defined(__clang__)
		113	#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 */
		117	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		118	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		119	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		120	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		121	#elif defined(_WIN32)
		122	#include <WinNT.h>
		123	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		124	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		125	#include <mbarrier.h>
		126	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		127	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		128	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		129	#endif
		130	#endif
		131
		132	#ifndef ECB_MEMORY_FENCE
		133	#if !ECB_AVOID_PTHREADS
		134	/*
		135	* if you get undefined symbol references to pthread_mutex_lock,
		136	* or failure to find pthread.h, then you should implement
		137	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		138	* OR provide pthread.h and link against the posix thread library
		139	* of your system.
		140	*/
		141	#include <pthread.h>
		142	#define ECB_NEEDS_PTHREADS 1
		143	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		144
		145	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		146	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		147	#endif
		148	#endif
		149
		150	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
		151	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		152	#endif
		153
		154	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
		155	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		156	#endif
		157
		158	/*****************************************************************************/
		159
66	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	160	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
67		161
68	#if __cplusplus	162	#if __cplusplus
69	#define ecb_inline static inline	163	#define ecb_inline static inline
70	#elif ECB_GCC_VERSION(2,5)	164	#elif ECB_GCC_VERSION(2,5)
…		…
189	x *= 0x01010101;	283	x *= 0x01010101;
190		284
191	return x >> 24;	285	return x >> 24;
192	}	286	}
193		287
194	/* you have the choice beetween something with a table lookup, */
195	/* something using lots of bit arithmetic and a simple loop */
196	/* we went for the loop */
197	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	288	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
198	ecb_function_ int ecb_ld32 (uint32_t x)	289	ecb_function_ int ecb_ld32 (uint32_t x)
199	{	290	{
200	int r = 0;	291	int r = 0;
201		292
…		…
216	if (x >> 32) { x >>= 32; r += 32; }	307	if (x >> 32) { x >>= 32; r += 32; }
217		308
218	return r + ecb_ld32 (x);	309	return r + ecb_ld32 (x);
219	}	310	}
220	#endif	311	#endif
		312
		313	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		314	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		315	{
		316	return ( (x * 0x0802U & 0x22110U)
		317	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		318	}
		319
		320	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		321	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		322	{
		323	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		324	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		325	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		326	x = ( x >> 8 ) \| ( x << 8);
		327
		328	return x;
		329	}
		330
		331	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		332	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		333	{
		334	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		335	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		336	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		337	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		338	x = ( x >> 16 ) \| ( x << 16);
		339
		340	return x;
		341	}
221		342
222	/* popcount64 is only available on 64 bit cpus as gcc builtin */	343	/* popcount64 is only available on 64 bit cpus as gcc builtin */
223	/* so for this version we are lazy */	344	/* so for this version we are lazy */
224	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	345	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
225	ecb_function_ int	346	ecb_function_ int
…		…
275		396
276	#if ECB_GCC_VERSION(4,5)	397	#if ECB_GCC_VERSION(4,5)
277	#define ecb_unreachable() __builtin_unreachable ()	398	#define ecb_unreachable() __builtin_unreachable ()
278	#else	399	#else
279	/* this seems to work fine, but gcc always emits a warning for it :/ */	400	/* this seems to work fine, but gcc always emits a warning for it :/ */
280	ecb_function_ void ecb_unreachable (void) ecb_noreturn;	401	ecb_inline void ecb_unreachable (void) ecb_noreturn;
281	ecb_function_ void ecb_unreachable (void) { }	402	ecb_inline void ecb_unreachable (void) { }
282	#endif	403	#endif
283		404
284	/* try to tell the compiler that some condition is definitely true */	405	/* try to tell the compiler that some condition is definitely true */
285	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	406	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
286		407
287	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;	408	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
288	ecb_function_ unsigned char	409	ecb_inline unsigned char
289	ecb_byteorder_helper (void)	410	ecb_byteorder_helper (void)
290	{	411	{
291	const uint32_t u = 0x11223344;	412	const uint32_t u = 0x11223344;
292	return (unsigned char )&u;	413	return (unsigned char )&u;
293	}	414	}
294		415
295	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;	416	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
296	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	417	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
297	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;	418	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
298	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	419	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
299		420
300	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	421	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
301	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	422	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
302	#else	423	#else
303	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	424	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		425	#endif
		426
		427	#if __cplusplus
		428	template<typename T>
		429	static inline T ecb_div_rd (T val, T div)
		430	{
		431	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		432	}
		433	template<typename T>
		434	static inline T ecb_div_ru (T val, T div)
		435	{
		436	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		437	}
		438	#else
		439	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		440	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
304	#endif	441	#endif
305		442
306	#if ecb_cplusplus_does_not_suck	443	#if ecb_cplusplus_does_not_suck
307	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */	444	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
308	template<typename T, int N>	445	template<typename T, int N>

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Comparing libecb/ecb.h (file contents): Revision 1.50 by root, Fri Jun 17 21:16:11 2011 UTC vs. Revision 1.81 by root, Fri Mar 23 19:04:07 2012 UTC

Diff Legend

Comparing libecb/ecb.h (file contents):
Revision 1.50 by root, Fri Jun 17 21:16:11 2011 UTC vs.
Revision 1.81 by root, Fri Mar 23 19:04:07 2012 UTC