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Comparing libecb/ecb.h (file contents):
Revision 1.120 by root, Sat Oct 26 09:13:54 2013 UTC vs.
Revision 1.183 by root, Mon Jan 20 14:10:06 2020 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> 4 * Copyright (©) 2009-2015 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:
… …
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 26 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THE POSSIBILITY OF SUCH DAMAGE. 27 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Alternatively, the contents of this file may be used under the terms of
30 * the GNU General Public License ("GPL") version 2 or any later version,
31 * in which case the provisions of the GPL are applicable instead of
32 * the above. If you wish to allow the use of your version of this file
33 * only under the terms of the GPL and not to allow others to use your
34 * version of this file under the BSD license, indicate your decision
35 * by deleting the provisions above and replace them with the notice
36 * and other provisions required by the GPL. If you do not delete the
37 * provisions above, a recipient may use your version of this file under
38 * either the BSD or the GPL.
28 */ 39 */
29 40
30#ifndef ECB_H 41#ifndef ECB_H
31#define ECB_H 42#define ECB_H
32 43
33/* 16 bits major, 16 bits minor */ 44/* 16 bits major, 16 bits minor */
34#define ECB_VERSION 0x00010003 45#define ECB_VERSION 0x00010008
35 46
36#ifdef _WIN32 47#ifdef _WIN32
37 typedef signed char int8_t; 48 typedef signed char int8_t;
38 typedef unsigned char uint8_t; 49 typedef unsigned char uint8_t;
50 typedef signed char int_fast8_t;
51 typedef unsigned char uint_fast8_t;
39 typedef signed short int16_t; 52 typedef signed short int16_t;
40 typedef unsigned short uint16_t; 53 typedef unsigned short uint16_t;
54 typedef signed int int_fast16_t;
55 typedef unsigned int uint_fast16_t;
41 typedef signed int int32_t; 56 typedef signed int int32_t;
42 typedef unsigned int uint32_t; 57 typedef unsigned int uint32_t;
58 typedef signed int int_fast32_t;
59 typedef unsigned int uint_fast32_t;
43 #if __GNUC__ 60 #if __GNUC__
44 typedef signed long long int64_t; 61 typedef signed long long int64_t;
45 typedef unsigned long long uint64_t; 62 typedef unsigned long long uint64_t;
46 #else /* _MSC_VER || __BORLANDC__ */ 63 #else /* _MSC_VER || __BORLANDC__ */
47 typedef signed __int64 int64_t; 64 typedef signed __int64 int64_t;
48 typedef unsigned __int64 uint64_t; 65 typedef unsigned __int64 uint64_t;
49 #endif 66 #endif
67 typedef int64_t int_fast64_t;
68 typedef uint64_t uint_fast64_t;
50 #ifdef _WIN64 69 #ifdef _WIN64
51 #define ECB_PTRSIZE 8 70 #define ECB_PTRSIZE 8
52 typedef uint64_t uintptr_t; 71 typedef uint64_t uintptr_t;
53 typedef int64_t intptr_t; 72 typedef int64_t intptr_t;
54 #else 73 #else
… …
56 typedef uint32_t uintptr_t; 75 typedef uint32_t uintptr_t;
57 typedef int32_t intptr_t; 76 typedef int32_t intptr_t;
58 #endif 77 #endif
59#else 78#else
60 #include <inttypes.h> 79 #include <inttypes.h>
61 #if UINTMAX_MAX > 0xffffffffU 80 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
62 #define ECB_PTRSIZE 8 81 #define ECB_PTRSIZE 8
63 #else 82 #else
64 #define ECB_PTRSIZE 4 83 #define ECB_PTRSIZE 4
65 #endif 84 #endif
66#endif 85#endif
67 86
87#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
88#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
89
90#ifndef ECB_OPTIMIZE_SIZE
91 #if __OPTIMIZE_SIZE__
92 #define ECB_OPTIMIZE_SIZE 1
93 #else
94 #define ECB_OPTIMIZE_SIZE 0
95 #endif
96#endif
97
68/* work around x32 idiocy by defining proper macros */ 98/* work around x32 idiocy by defining proper macros */
69#if __x86_64 || _M_AMD64 99#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
70 #if _ILP32 100 #if _ILP32
71 #define ECB_AMD64_X32 1 101 #define ECB_AMD64_X32 1
72 #else 102 #else
73 #define ECB_AMD64 1 103 #define ECB_AMD64 1
74 #endif 104 #endif
… …
79 * causing enormous grief in return for some better fake benchmark numbers. 109 * causing enormous grief in return for some better fake benchmark numbers.
80 * or so. 110 * or so.
81 * we try to detect these and simply assume they are not gcc - if they have 111 * we try to detect these and simply assume they are not gcc - if they have
82 * an issue with that they should have done it right in the first place. 112 * an issue with that they should have done it right in the first place.
83 */ 113 */
84#ifndef ECB_GCC_VERSION
85 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ 114#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
86 #define ECB_GCC_VERSION(major,minor) 0 115 #define ECB_GCC_VERSION(major,minor) 0
87 #else 116#else
88 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 117 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
89 #endif 118#endif
90#endif
91 119
92#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ 120#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
93#define ECB_C99 (__STDC_VERSION__ >= 199901L) 121
94#define ECB_C11 (__STDC_VERSION__ >= 201112L) 122#if __clang__ && defined __has_builtin
123 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
124#else
125 #define ECB_CLANG_BUILTIN(x) 0
126#endif
127
128#if __clang__ && defined __has_extension
129 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
130#else
131 #define ECB_CLANG_EXTENSION(x) 0
132#endif
133
95#define ECB_CPP (__cplusplus+0) 134#define ECB_CPP (__cplusplus+0)
96#define ECB_CPP11 (__cplusplus >= 201103L) 135#define ECB_CPP11 (__cplusplus >= 201103L)
136#define ECB_CPP14 (__cplusplus >= 201402L)
137#define ECB_CPP17 (__cplusplus >= 201703L)
138
139#if ECB_CPP
140 #define ECB_C 0
141 #define ECB_STDC_VERSION 0
142#else
143 #define ECB_C 1
144 #define ECB_STDC_VERSION __STDC_VERSION__
145#endif
146
147#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
148#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
149#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
97 150
98#if ECB_CPP 151#if ECB_CPP
99 #define ECB_EXTERN_C extern "C" 152 #define ECB_EXTERN_C extern "C"
100 #define ECB_EXTERN_C_BEG ECB_EXTERN_C { 153 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
101 #define ECB_EXTERN_C_END } 154 #define ECB_EXTERN_C_END }
… …
116 169
117#if ECB_NO_SMP 170#if ECB_NO_SMP
118 #define ECB_MEMORY_FENCE do { } while (0) 171 #define ECB_MEMORY_FENCE do { } while (0)
119#endif 172#endif
120 173
174/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
175#if __xlC__ && ECB_CPP
176 #include <builtins.h>
177#endif
178
179#if 1400 <= _MSC_VER
180 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
181#endif
182
121#ifndef ECB_MEMORY_FENCE 183#ifndef ECB_MEMORY_FENCE
122 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 184 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
185 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
123 #if __i386 || __i386__ 186 #if __i386 || __i386__
124 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 187 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
125 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 188 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
126 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 189 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
127 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 190 #elif ECB_GCC_AMD64
128 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 191 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
129 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 192 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
130 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 193 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
131 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 194 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
132 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 195 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
196 #elif defined __ARM_ARCH_2__ \
197 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
198 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
199 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
200 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
201 || defined __ARM_ARCH_5TEJ__
202 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
133 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 203 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
134 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 204 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
205 || defined __ARM_ARCH_6T2__
135 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 206 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
136 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 207 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
137 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 208 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
138 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 209 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
139 #elif __sparc || __sparc__ 210 #elif __aarch64__
211 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
212 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
140 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 213 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
141 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 214 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
142 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 215 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
143 #elif defined __s390__ || defined __s390x__ 216 #elif defined __s390__ || defined __s390x__
144 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 217 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
… …
165 238
166#ifndef ECB_MEMORY_FENCE 239#ifndef ECB_MEMORY_FENCE
167 #if ECB_GCC_VERSION(4,7) 240 #if ECB_GCC_VERSION(4,7)
168 /* see comment below (stdatomic.h) about the C11 memory model. */ 241 /* see comment below (stdatomic.h) about the C11 memory model. */
169 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 242 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
243 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
244 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
245 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
170 246
171 /* The __has_feature syntax from clang is so misdesigned that we cannot use it 247 #elif ECB_CLANG_EXTENSION(c_atomic)
172 * without risking compile time errors with other compilers. We *could*
173 * define our own ecb_clang_has_feature, but I just can't be bothered to work
174 * around this shit time and again.
175 * #elif defined __clang && __has_feature (cxx_atomic)
176 * // see comment below (stdatomic.h) about the C11 memory model. 248 /* see comment below (stdatomic.h) about the C11 memory model. */
177 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 249 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
178 */ 250 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
251 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
252 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
179 253
180 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 254 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
181 #define ECB_MEMORY_FENCE __sync_synchronize () 255 #define ECB_MEMORY_FENCE __sync_synchronize ()
256 #elif _MSC_VER >= 1500 /* VC++ 2008 */
257 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
258 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
259 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
260 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
261 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
182 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 262 #elif _MSC_VER >= 1400 /* VC++ 2005 */
183 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 263 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
184 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 264 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
185 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 265 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
186 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 266 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
187 #elif defined _WIN32 267 #elif defined _WIN32
188 #include <WinNT.h> 268 #include <WinNT.h>
189 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 269 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
190 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 270 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
191 #include <mbarrier.h> 271 #include <mbarrier.h>
192 #define ECB_MEMORY_FENCE __machine_rw_barrier () 272 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
193 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () 273 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
194 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () 274 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
275 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
195 #elif __xlC__ 276 #elif __xlC__
196 #define ECB_MEMORY_FENCE __sync () 277 #define ECB_MEMORY_FENCE __sync ()
197 #endif 278 #endif
198#endif 279#endif
199 280
200#ifndef ECB_MEMORY_FENCE 281#ifndef ECB_MEMORY_FENCE
201 #if ECB_C11 && !defined __STDC_NO_ATOMICS__ 282 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
202 /* we assume that these memory fences work on all variables/all memory accesses, */ 283 /* we assume that these memory fences work on all variables/all memory accesses, */
203 /* not just C11 atomics and atomic accesses */ 284 /* not just C11 atomics and atomic accesses */
204 #include <stdatomic.h> 285 #include <stdatomic.h>
205 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
206 /* any fence other than seq_cst, which isn't very efficient for us. */
207 /* Why that is, we don't know - either the C11 memory model is quite useless */
208 /* for most usages, or gcc and clang have a bug */
209 /* I *currently* lean towards the latter, and inefficiently implement */
210 /* all three of ecb's fences as a seq_cst fence */
211 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) 286 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
287 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
288 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
212 #endif 289 #endif
213#endif 290#endif
214 291
215#ifndef ECB_MEMORY_FENCE 292#ifndef ECB_MEMORY_FENCE
216 #if !ECB_AVOID_PTHREADS 293 #if !ECB_AVOID_PTHREADS
… …
236 313
237#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE 314#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
238 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 315 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
239#endif 316#endif
240 317
318#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
319 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
320#endif
321
241/*****************************************************************************/ 322/*****************************************************************************/
242 323
243#if __cplusplus 324#if ECB_CPP
244 #define ecb_inline static inline 325 #define ecb_inline static inline
245#elif ECB_GCC_VERSION(2,5) 326#elif ECB_GCC_VERSION(2,5)
246 #define ecb_inline static __inline__ 327 #define ecb_inline static __inline__
247#elif ECB_C99 328#elif ECB_C99
248 #define ecb_inline static inline 329 #define ecb_inline static inline
… …
262 343
263#define ECB_CONCAT_(a, b) a ## b 344#define ECB_CONCAT_(a, b) a ## b
264#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 345#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
265#define ECB_STRINGIFY_(a) # a 346#define ECB_STRINGIFY_(a) # a
266#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 347#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
348#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
267 349
268#define ecb_function_ ecb_inline 350#define ecb_function_ ecb_inline
269 351
270#if ECB_GCC_VERSION(3,1) 352#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
271 #define ecb_attribute(attrlist) __attribute__(attrlist) 353 #define ecb_attribute(attrlist) __attribute__ (attrlist)
354#else
355 #define ecb_attribute(attrlist)
356#endif
357
358#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
272 #define ecb_is_constant(expr) __builtin_constant_p (expr) 359 #define ecb_is_constant(expr) __builtin_constant_p (expr)
360#else
361 /* possible C11 impl for integral types
362 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
363 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
364
365 #define ecb_is_constant(expr) 0
366#endif
367
368#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
273 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 369 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
370#else
371 #define ecb_expect(expr,value) (expr)
372#endif
373
374#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
274 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 375 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
275#else 376#else
276 #define ecb_attribute(attrlist)
277 #define ecb_is_constant(expr) 0
278 #define ecb_expect(expr,value) (expr)
279 #define ecb_prefetch(addr,rw,locality) 377 #define ecb_prefetch(addr,rw,locality)
280#endif 378#endif
281 379
282/* no emulation for ecb_decltype */ 380/* no emulation for ecb_decltype */
283#if ECB_GCC_VERSION(4,5) 381#if ECB_CPP11
382 // older implementations might have problems with decltype(x)::type, work around it
383 template<class T> struct ecb_decltype_t { typedef T type; };
284 #define ecb_decltype(x) __decltype(x) 384 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
285#elif ECB_GCC_VERSION(3,0) 385#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
286 #define ecb_decltype(x) __typeof(x) 386 #define ecb_decltype(x) __typeof__ (x)
287#endif 387#endif
288 388
389#if _MSC_VER >= 1300
390 #define ecb_deprecated __declspec (deprecated)
391#else
392 #define ecb_deprecated ecb_attribute ((__deprecated__))
393#endif
394
395#if _MSC_VER >= 1500
396 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
397#elif ECB_GCC_VERSION(4,5)
398 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
399#else
400 #define ecb_deprecated_message(msg) ecb_deprecated
401#endif
402
403#if _MSC_VER >= 1400
404 #define ecb_noinline __declspec (noinline)
405#else
289#define ecb_noinline ecb_attribute ((__noinline__)) 406 #define ecb_noinline ecb_attribute ((__noinline__))
407#endif
408
290#define ecb_unused ecb_attribute ((__unused__)) 409#define ecb_unused ecb_attribute ((__unused__))
291#define ecb_const ecb_attribute ((__const__)) 410#define ecb_const ecb_attribute ((__const__))
292#define ecb_pure ecb_attribute ((__pure__)) 411#define ecb_pure ecb_attribute ((__pure__))
293 412
294#if ECB_C11 413#if ECB_C11 || __IBMC_NORETURN
414 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
295 #define ecb_noreturn _Noreturn 415 #define ecb_noreturn _Noreturn
416#elif ECB_CPP11
417 #define ecb_noreturn [[noreturn]]
418#elif _MSC_VER >= 1200
419 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
420 #define ecb_noreturn __declspec (noreturn)
296#else 421#else
297 #define ecb_noreturn ecb_attribute ((__noreturn__)) 422 #define ecb_noreturn ecb_attribute ((__noreturn__))
298#endif 423#endif
299 424
300#if ECB_GCC_VERSION(4,3) 425#if ECB_GCC_VERSION(4,3)
… …
315/* for compatibility to the rest of the world */ 440/* for compatibility to the rest of the world */
316#define ecb_likely(expr) ecb_expect_true (expr) 441#define ecb_likely(expr) ecb_expect_true (expr)
317#define ecb_unlikely(expr) ecb_expect_false (expr) 442#define ecb_unlikely(expr) ecb_expect_false (expr)
318 443
319/* count trailing zero bits and count # of one bits */ 444/* count trailing zero bits and count # of one bits */
320#if ECB_GCC_VERSION(3,4) 445#if ECB_GCC_VERSION(3,4) \
446 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
447 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
448 && ECB_CLANG_BUILTIN(__builtin_popcount))
321 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ 449 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
322 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 450 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
323 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 451 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
324 #define ecb_ctz32(x) __builtin_ctz (x) 452 #define ecb_ctz32(x) __builtin_ctz (x)
325 #define ecb_ctz64(x) __builtin_ctzll (x) 453 #define ecb_ctz64(x) __builtin_ctzll (x)
326 #define ecb_popcount32(x) __builtin_popcount (x) 454 #define ecb_popcount32(x) __builtin_popcount (x)
327 /* no popcountll */ 455 /* no popcountll */
328#else 456#else
329 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 457 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
330 ecb_function_ int 458 ecb_function_ ecb_const int
331 ecb_ctz32 (uint32_t x) 459 ecb_ctz32 (uint32_t x)
332 { 460 {
461#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
462 unsigned long r;
463 _BitScanForward (&r, x);
464 return (int)r;
465#else
333 int r = 0; 466 int r = 0;
334 467
335 x &= ~x + 1; /* this isolates the lowest bit */ 468 x &= ~x + 1; /* this isolates the lowest bit */
336 469
337#if ECB_branchless_on_i386 470#if ECB_branchless_on_i386
… …
347 if (x & 0xff00ff00) r += 8; 480 if (x & 0xff00ff00) r += 8;
348 if (x & 0xffff0000) r += 16; 481 if (x & 0xffff0000) r += 16;
349#endif 482#endif
350 483
351 return r; 484 return r;
485#endif
352 } 486 }
353 487
354 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 488 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
355 ecb_function_ int 489 ecb_function_ ecb_const int
356 ecb_ctz64 (uint64_t x) 490 ecb_ctz64 (uint64_t x)
357 { 491 {
492#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
493 unsigned long r;
494 _BitScanForward64 (&r, x);
495 return (int)r;
496#else
358 int shift = x & 0xffffffffU ? 0 : 32; 497 int shift = x & 0xffffffff ? 0 : 32;
359 return ecb_ctz32 (x >> shift) + shift; 498 return ecb_ctz32 (x >> shift) + shift;
499#endif
360 } 500 }
361 501
362 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 502 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
363 ecb_function_ int 503 ecb_function_ ecb_const int
364 ecb_popcount32 (uint32_t x) 504 ecb_popcount32 (uint32_t x)
365 { 505 {
366 x -= (x >> 1) & 0x55555555; 506 x -= (x >> 1) & 0x55555555;
367 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 507 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
368 x = ((x >> 4) + x) & 0x0f0f0f0f; 508 x = ((x >> 4) + x) & 0x0f0f0f0f;
369 x *= 0x01010101; 509 x *= 0x01010101;
370 510
371 return x >> 24; 511 return x >> 24;
372 } 512 }
373 513
374 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 514 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
375 ecb_function_ int ecb_ld32 (uint32_t x) 515 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
376 { 516 {
517#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
518 unsigned long r;
519 _BitScanReverse (&r, x);
520 return (int)r;
521#else
377 int r = 0; 522 int r = 0;
378 523
379 if (x >> 16) { x >>= 16; r += 16; } 524 if (x >> 16) { x >>= 16; r += 16; }
380 if (x >> 8) { x >>= 8; r += 8; } 525 if (x >> 8) { x >>= 8; r += 8; }
381 if (x >> 4) { x >>= 4; r += 4; } 526 if (x >> 4) { x >>= 4; r += 4; }
382 if (x >> 2) { x >>= 2; r += 2; } 527 if (x >> 2) { x >>= 2; r += 2; }
383 if (x >> 1) { r += 1; } 528 if (x >> 1) { r += 1; }
384 529
385 return r; 530 return r;
531#endif
386 } 532 }
387 533
388 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 534 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
389 ecb_function_ int ecb_ld64 (uint64_t x) 535 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
390 { 536 {
537#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
538 unsigned long r;
539 _BitScanReverse64 (&r, x);
540 return (int)r;
541#else
391 int r = 0; 542 int r = 0;
392 543
393 if (x >> 32) { x >>= 32; r += 32; } 544 if (x >> 32) { x >>= 32; r += 32; }
394 545
395 return r + ecb_ld32 (x); 546 return r + ecb_ld32 (x);
396 }
397#endif 547#endif
548 }
549#endif
398 550
399ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 551ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
400ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 552ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
401ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 553ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
402ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } 554ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
403 555
404ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 556ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
405ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 557ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
406{ 558{
407 return ( (x * 0x0802U & 0x22110U) 559 return ( (x * 0x0802U & 0x22110U)
408 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 560 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
409} 561}
410 562
411ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 563ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
412ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 564ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
413{ 565{
414 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 566 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
415 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 567 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
416 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 568 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
417 x = ( x >> 8 ) | ( x << 8); 569 x = ( x >> 8 ) | ( x << 8);
418 570
419 return x; 571 return x;
420} 572}
421 573
422ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 574ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
423ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 575ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
424{ 576{
425 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 577 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
426 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 578 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
427 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 579 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
428 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 580 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
431 return x; 583 return x;
432} 584}
433 585
434/* popcount64 is only available on 64 bit cpus as gcc builtin */ 586/* popcount64 is only available on 64 bit cpus as gcc builtin */
435/* so for this version we are lazy */ 587/* so for this version we are lazy */
436ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 588ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
437ecb_function_ int 589ecb_function_ ecb_const int
438ecb_popcount64 (uint64_t x) 590ecb_popcount64 (uint64_t x)
439{ 591{
440 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 592 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
441} 593}
442 594
443ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 595ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
444ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 596ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
445ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 597ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
446ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 598ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
447ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 599ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
448ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 600ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
449ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 601ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
450ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 602ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
451 603
452ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 604ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
453ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 605ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
454ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 606ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
455ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 607ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
456ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 608ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
457ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 609ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
458ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 610ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
459ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 611ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
460 612
461#if ECB_GCC_VERSION(4,3) 613#if ECB_CPP
614
615inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
616inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
617inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
618inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
619
620inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
621inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
622inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
623inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
624
625inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
626inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
627inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
628inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
629
630inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
631inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
632inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
633inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
634
635inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
636inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
637inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
638
639inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
640inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
641inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
642inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
643
644inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
645inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
646inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
647inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
648
649#endif
650
651#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
652 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
653 #define ecb_bswap16(x) __builtin_bswap16 (x)
654 #else
462 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 655 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
656 #endif
463 #define ecb_bswap32(x) __builtin_bswap32 (x) 657 #define ecb_bswap32(x) __builtin_bswap32 (x)
464 #define ecb_bswap64(x) __builtin_bswap64 (x) 658 #define ecb_bswap64(x) __builtin_bswap64 (x)
659#elif _MSC_VER
660 #include <stdlib.h>
661 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
662 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
663 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
465#else 664#else
466 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 665 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
467 ecb_function_ uint16_t 666 ecb_function_ ecb_const uint16_t
468 ecb_bswap16 (uint16_t x) 667 ecb_bswap16 (uint16_t x)
469 { 668 {
470 return ecb_rotl16 (x, 8); 669 return ecb_rotl16 (x, 8);
471 } 670 }
472 671
473 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 672 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
474 ecb_function_ uint32_t 673 ecb_function_ ecb_const uint32_t
475 ecb_bswap32 (uint32_t x) 674 ecb_bswap32 (uint32_t x)
476 { 675 {
477 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 676 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
478 } 677 }
479 678
480 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 679 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
481 ecb_function_ uint64_t 680 ecb_function_ ecb_const uint64_t
482 ecb_bswap64 (uint64_t x) 681 ecb_bswap64 (uint64_t x)
483 { 682 {
484 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 683 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
485 } 684 }
486#endif 685#endif
487 686
488#if ECB_GCC_VERSION(4,5) 687#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
489 #define ecb_unreachable() __builtin_unreachable () 688 #define ecb_unreachable() __builtin_unreachable ()
490#else 689#else
491 /* this seems to work fine, but gcc always emits a warning for it :/ */ 690 /* this seems to work fine, but gcc always emits a warning for it :/ */
492 ecb_inline void ecb_unreachable (void) ecb_noreturn; 691 ecb_inline ecb_noreturn void ecb_unreachable (void);
493 ecb_inline void ecb_unreachable (void) { } 692 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
494#endif 693#endif
495 694
496/* try to tell the compiler that some condition is definitely true */ 695/* try to tell the compiler that some condition is definitely true */
497#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 696#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
498 697
499ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 698ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
500ecb_inline unsigned char 699ecb_inline ecb_const uint32_t
501ecb_byteorder_helper (void) 700ecb_byteorder_helper (void)
502{ 701{
503 /* the union code still generates code under pressure in gcc, */ 702 /* the union code still generates code under pressure in gcc, */
504 /* but less than using pointers, and always seems to */ 703 /* but less than using pointers, and always seems to */
505 /* successfully return a constant. */ 704 /* successfully return a constant. */
506 /* the reason why we have this horrible preprocessor mess */ 705 /* the reason why we have this horrible preprocessor mess */
507 /* is to avoid it in all cases, at least on common architectures */ 706 /* is to avoid it in all cases, at least on common architectures */
508 /* or when using a recent enough gcc version (>= 4.6) */ 707 /* or when using a recent enough gcc version (>= 4.6) */
509#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
510 return 0x44;
511#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 708#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
709 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
710 #define ECB_LITTLE_ENDIAN 1
512 return 0x44; 711 return 0x44332211;
513#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 712#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
713 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
714 #define ECB_BIG_ENDIAN 1
514 return 0x11; 715 return 0x11223344;
515#else 716#else
516 union 717 union
517 { 718 {
719 uint8_t c[4];
518 uint32_t i; 720 uint32_t u;
519 uint8_t c;
520 } u = { 0x11223344 }; 721 } u = { 0x11, 0x22, 0x33, 0x44 };
521 return u.c; 722 return u.u;
522#endif 723#endif
523} 724}
524 725
525ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 726ecb_inline ecb_const ecb_bool ecb_big_endian (void);
526ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 727ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
527ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 728ecb_inline ecb_const ecb_bool ecb_little_endian (void);
528ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 729ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
730
731/*****************************************************************************/
732/* unaligned load/store */
733
734ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
735ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
736ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
737
738ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
739ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
740ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
741
742ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
743ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
744ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
745
746ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
747ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
748ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
749
750ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
751ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
752ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
753
754ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
755ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
756ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
757
758ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
759ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
760ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
761
762ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
763ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
764ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
765
766ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
767ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
768ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
769
770ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
771ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
772ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
773
774#ifdef ECB_CPP
775
776inline uint8_t ecb_bswap (uint8_t v) { return v; }
777inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
778inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
779inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
780
781template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
782template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
783template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
784template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
785template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
786template<typename T> inline T ecb_peek_u (const void *ptr) { T v; std::memcpy (&v, ptr, sizeof (v)); return v; }
787template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
788template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
789
790template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
791template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
792template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
793template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
794template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
795template<typename T> inline void ecb_poke_u (void *ptr, T v) { std::memcpy (ptr, &v, sizeof (v)); }
796template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
797template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
798
799#endif
800
801/*****************************************************************************/
529 802
530#if ECB_GCC_VERSION(3,0) || ECB_C99 803#if ECB_GCC_VERSION(3,0) || ECB_C99
531 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 804 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
532#else 805#else
533 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 806 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
534#endif 807#endif
535 808
536#if __cplusplus 809#if ECB_CPP
537 template<typename T> 810 template<typename T>
538 static inline T ecb_div_rd (T val, T div) 811 static inline T ecb_div_rd (T val, T div)
539 { 812 {
540 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 813 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
541 } 814 }
… …
558 } 831 }
559#else 832#else
560 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 833 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
561#endif 834#endif
562 835
836/*****************************************************************************/
837
838ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
839ecb_function_ ecb_const uint32_t
840ecb_binary16_to_binary32 (uint32_t x)
841{
842 unsigned int s = (x & 0x8000) << (31 - 15);
843 int e = (x >> 10) & 0x001f;
844 unsigned int m = x & 0x03ff;
845
846 if (ecb_expect_false (e == 31))
847 /* infinity or NaN */
848 e = 255 - (127 - 15);
849 else if (ecb_expect_false (!e))
850 {
851 if (ecb_expect_true (!m))
852 /* zero, handled by code below by forcing e to 0 */
853 e = 0 - (127 - 15);
854 else
855 {
856 /* subnormal, renormalise */
857 unsigned int s = 10 - ecb_ld32 (m);
858
859 m = (m << s) & 0x3ff; /* mask implicit bit */
860 e -= s - 1;
861 }
862 }
863
864 /* e and m now are normalised, or zero, (or inf or nan) */
865 e += 127 - 15;
866
867 return s | (e << 23) | (m << (23 - 10));
868}
869
870ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
871ecb_function_ ecb_const uint16_t
872ecb_binary32_to_binary16 (uint32_t x)
873{
874 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
875 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
876 unsigned int m = x & 0x007fffff;
877
878 x &= 0x7fffffff;
879
880 /* if it's within range of binary16 normals, use fast path */
881 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
882 {
883 /* mantissa round-to-even */
884 m += 0x00000fff + ((m >> (23 - 10)) & 1);
885
886 /* handle overflow */
887 if (ecb_expect_false (m >= 0x00800000))
888 {
889 m >>= 1;
890 e += 1;
891 }
892
893 return s | (e << 10) | (m >> (23 - 10));
894 }
895
896 /* handle large numbers and infinity */
897 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
898 return s | 0x7c00;
899
900 /* handle zero, subnormals and small numbers */
901 if (ecb_expect_true (x < 0x38800000))
902 {
903 /* zero */
904 if (ecb_expect_true (!x))
905 return s;
906
907 /* handle subnormals */
908
909 /* too small, will be zero */
910 if (e < (14 - 24)) /* might not be sharp, but is good enough */
911 return s;
912
913 m |= 0x00800000; /* make implicit bit explicit */
914
915 /* very tricky - we need to round to the nearest e (+10) bit value */
916 {
917 unsigned int bits = 14 - e;
918 unsigned int half = (1 << (bits - 1)) - 1;
919 unsigned int even = (m >> bits) & 1;
920
921 /* if this overflows, we will end up with a normalised number */
922 m = (m + half + even) >> bits;
923 }
924
925 return s | m;
926 }
927
928 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
929 m >>= 13;
930
931 return s | 0x7c00 | m | !m;
932}
933
563/*******************************************************************************/ 934/*******************************************************************************/
564/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ 935/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
565 936
566/* basically, everything uses "ieee pure-endian" floating point numbers */ 937/* basically, everything uses "ieee pure-endian" floating point numbers */
567/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 938/* the only noteworthy exception is ancient armle, which uses order 43218765 */
568#if 0 \ 939#if 0 \
569 || __i386 || __i386__ \ 940 || __i386 || __i386__ \
570 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 941 || ECB_GCC_AMD64 \
571 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 942 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
572 || defined __arm__ && defined __ARM_EABI__ \
573 || defined __s390__ || defined __s390x__ \ 943 || defined __s390__ || defined __s390x__ \
574 || defined __mips__ \ 944 || defined __mips__ \
575 || defined __alpha__ \ 945 || defined __alpha__ \
576 || defined __hppa__ \ 946 || defined __hppa__ \
577 || defined __ia64__ \ 947 || defined __ia64__ \
578 || defined __m68k__ \ 948 || defined __m68k__ \
579 || defined __m88k__ \ 949 || defined __m88k__ \
580 || defined __sh__ \ 950 || defined __sh__ \
581 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 951 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
952 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
953 || defined __aarch64__
582 #define ECB_STDFP 1 954 #define ECB_STDFP 1
583 #include <string.h> /* for memcpy */ 955 #include <string.h> /* for memcpy */
584#else 956#else
585 #define ECB_STDFP 0 957 #define ECB_STDFP 0
586#endif 958#endif
587 959
588#ifndef ECB_NO_LIBM 960#ifndef ECB_NO_LIBM
589 961
590 #include <math.h> /* for frexp*, ldexp* */ 962 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
591 963
592 /* converts an ieee half/binary16 to a float */ 964 /* only the oldest of old doesn't have this one. solaris. */
593 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 965 #ifdef INFINITY
594 ecb_function_ float 966 #define ECB_INFINITY INFINITY
595 ecb_binary16_to_float (uint16_t x) 967 #else
596 { 968 #define ECB_INFINITY HUGE_VAL
597 int e = (x >> 10) & 0x1f; 969 #endif
598 int m = x & 0x3ff;
599 float r;
600 970
601 if (!e)
602 r = ldexpf (m , -24);
603 else if (e != 31)
604 r = ldexpf (m + 0x400, e - 25);
605 else if (m)
606 #ifdef NAN 971 #ifdef NAN
607 r = NAN; 972 #define ECB_NAN NAN
608 #endif
609 else 973 #else
610 r = INFINITY; 974 #define ECB_NAN ECB_INFINITY
975 #endif
611 976
612 return x & 0x8000 ? -r : r; 977 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
613 } 978 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
979 #define ecb_frexpf(x,e) frexpf ((x), (e))
980 #else
981 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
982 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
983 #endif
614 984
615 /* convert a float to ieee single/binary32 */ 985 /* convert a float to ieee single/binary32 */
616 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 986 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
617 ecb_function_ uint32_t 987 ecb_function_ ecb_const uint32_t
618 ecb_float_to_binary32 (float x) 988 ecb_float_to_binary32 (float x)
619 { 989 {
620 uint32_t r; 990 uint32_t r;
621 991
622 #if ECB_STDFP 992 #if ECB_STDFP
… …
629 if (x == 0e0f ) return 0x00000000U; 999 if (x == 0e0f ) return 0x00000000U;
630 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 1000 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
631 if (x < -3.40282346638528860e+38f) return 0xff800000U; 1001 if (x < -3.40282346638528860e+38f) return 0xff800000U;
632 if (x != x ) return 0x7fbfffffU; 1002 if (x != x ) return 0x7fbfffffU;
633 1003
634 m = frexpf (x, &e) * 0x1000000U; 1004 m = ecb_frexpf (x, &e) * 0x1000000U;
635 1005
636 r = m & 0x80000000U; 1006 r = m & 0x80000000U;
637 1007
638 if (r) 1008 if (r)
639 m = -m; 1009 m = -m;
… …
651 1021
652 return r; 1022 return r;
653 } 1023 }
654 1024
655 /* converts an ieee single/binary32 to a float */ 1025 /* converts an ieee single/binary32 to a float */
656 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 1026 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
657 ecb_function_ float 1027 ecb_function_ ecb_const float
658 ecb_binary32_to_float (uint32_t x) 1028 ecb_binary32_to_float (uint32_t x)
659 { 1029 {
660 float r; 1030 float r;
661 1031
662 #if ECB_STDFP 1032 #if ECB_STDFP
… …
672 x |= 0x800000U; 1042 x |= 0x800000U;
673 else 1043 else
674 e = 1; 1044 e = 1;
675 1045
676 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 1046 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
677 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 1047 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
678 1048
679 r = neg ? -r : r; 1049 r = neg ? -r : r;
680 #endif 1050 #endif
681 1051
682 return r; 1052 return r;
683 } 1053 }
684 1054
685 /* convert a double to ieee double/binary64 */ 1055 /* convert a double to ieee double/binary64 */
686 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 1056 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
687 ecb_function_ uint64_t 1057 ecb_function_ ecb_const uint64_t
688 ecb_double_to_binary64 (double x) 1058 ecb_double_to_binary64 (double x)
689 { 1059 {
690 uint64_t r; 1060 uint64_t r;
691 1061
692 #if ECB_STDFP 1062 #if ECB_STDFP
… …
721 1091
722 return r; 1092 return r;
723 } 1093 }
724 1094
725 /* converts an ieee double/binary64 to a double */ 1095 /* converts an ieee double/binary64 to a double */
726 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 1096 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
727 ecb_function_ double 1097 ecb_function_ ecb_const double
728 ecb_binary64_to_double (uint64_t x) 1098 ecb_binary64_to_double (uint64_t x)
729 { 1099 {
730 double r; 1100 double r;
731 1101
732 #if ECB_STDFP 1102 #if ECB_STDFP
… …
750 #endif 1120 #endif
751 1121
752 return r; 1122 return r;
753 } 1123 }
754 1124
755#endif 1125 /* convert a float to ieee half/binary16 */
1126 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1127 ecb_function_ ecb_const uint16_t
1128 ecb_float_to_binary16 (float x)
1129 {
1130 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1131 }
756 1132
757#endif 1133 /* convert an ieee half/binary16 to float */
1134 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1135 ecb_function_ ecb_const float
1136 ecb_binary16_to_float (uint16_t x)
1137 {
1138 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1139 }
758 1140
1141#endif
1142
1143#endif
1144

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