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Comparing libeio/ecb.h (file contents):
Revision 1.19 by root, Fri Jan 24 23:46:17 2014 UTC vs.
Revision 1.31 by root, Thu Sep 3 17:20:45 2020 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2013 Marc Alexander Lehmann <libecb@schmorp.de> 4 * Copyright (©) 2009-2015,2018-2020 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#include <string.h> /* for memcpy */
48
49#if defined (_WIN32) && !defined (__MINGW32__)
37 typedef signed char int8_t; 50 typedef signed char int8_t;
38 typedef unsigned char uint8_t; 51 typedef unsigned char uint8_t;
52 typedef signed char int_fast8_t;
53 typedef unsigned char uint_fast8_t;
39 typedef signed short int16_t; 54 typedef signed short int16_t;
40 typedef unsigned short uint16_t; 55 typedef unsigned short uint16_t;
56 typedef signed int int_fast16_t;
57 typedef unsigned int uint_fast16_t;
41 typedef signed int int32_t; 58 typedef signed int int32_t;
42 typedef unsigned int uint32_t; 59 typedef unsigned int uint32_t;
60 typedef signed int int_fast32_t;
61 typedef unsigned int uint_fast32_t;
43 #if __GNUC__ 62 #if __GNUC__
44 typedef signed long long int64_t; 63 typedef signed long long int64_t;
45 typedef unsigned long long uint64_t; 64 typedef unsigned long long uint64_t;
46 #else /* _MSC_VER || __BORLANDC__ */ 65 #else /* _MSC_VER || __BORLANDC__ */
47 typedef signed __int64 int64_t; 66 typedef signed __int64 int64_t;
48 typedef unsigned __int64 uint64_t; 67 typedef unsigned __int64 uint64_t;
49 #endif 68 #endif
69 typedef int64_t int_fast64_t;
70 typedef uint64_t uint_fast64_t;
50 #ifdef _WIN64 71 #ifdef _WIN64
51 #define ECB_PTRSIZE 8 72 #define ECB_PTRSIZE 8
52 typedef uint64_t uintptr_t; 73 typedef uint64_t uintptr_t;
53 typedef int64_t intptr_t; 74 typedef int64_t intptr_t;
54 #else 75 #else
… …
56 typedef uint32_t uintptr_t; 77 typedef uint32_t uintptr_t;
57 typedef int32_t intptr_t; 78 typedef int32_t intptr_t;
58 #endif 79 #endif
59#else 80#else
60 #include <inttypes.h> 81 #include <inttypes.h>
61 #if UINTMAX_MAX > 0xffffffffU 82 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
62 #define ECB_PTRSIZE 8 83 #define ECB_PTRSIZE 8
63 #else 84 #else
64 #define ECB_PTRSIZE 4 85 #define ECB_PTRSIZE 4
65 #endif 86 #endif
66#endif 87#endif
67 88
89#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
90#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
91
92#ifndef ECB_OPTIMIZE_SIZE
93 #if __OPTIMIZE_SIZE__
94 #define ECB_OPTIMIZE_SIZE 1
95 #else
96 #define ECB_OPTIMIZE_SIZE 0
97 #endif
98#endif
99
68/* work around x32 idiocy by defining proper macros */ 100/* work around x32 idiocy by defining proper macros */
69#if __amd64 || __x86_64 || _M_AMD64 || _M_X64 101#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
70 #if _ILP32 102 #if _ILP32
71 #define ECB_AMD64_X32 1 103 #define ECB_AMD64_X32 1
72 #else 104 #else
73 #define ECB_AMD64 1 105 #define ECB_AMD64 1
74 #endif 106 #endif
… …
79 * causing enormous grief in return for some better fake benchmark numbers. 111 * causing enormous grief in return for some better fake benchmark numbers.
80 * or so. 112 * or so.
81 * we try to detect these and simply assume they are not gcc - if they have 113 * 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. 114 * an issue with that they should have done it right in the first place.
83 */ 115 */
84#ifndef ECB_GCC_VERSION
85 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ 116#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
86 #define ECB_GCC_VERSION(major,minor) 0 117 #define ECB_GCC_VERSION(major,minor) 0
87 #else 118#else
88 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 119 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
89 #endif 120#endif
121
122#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
123
124#if __clang__ && defined __has_builtin
125 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
126#else
127 #define ECB_CLANG_BUILTIN(x) 0
128#endif
129
130#if __clang__ && defined __has_extension
131 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
132#else
133 #define ECB_CLANG_EXTENSION(x) 0
90#endif 134#endif
91 135
92#define ECB_CPP (__cplusplus+0) 136#define ECB_CPP (__cplusplus+0)
93#define ECB_CPP11 (__cplusplus >= 201103L) 137#define ECB_CPP11 (__cplusplus >= 201103L)
138#define ECB_CPP14 (__cplusplus >= 201402L)
139#define ECB_CPP17 (__cplusplus >= 201703L)
94 140
95#if ECB_CPP 141#if ECB_CPP
96 #define ECB_C 0 142 #define ECB_C 0
97 #define ECB_STDC_VERSION 0 143 #define ECB_STDC_VERSION 0
98#else 144#else
… …
100 #define ECB_STDC_VERSION __STDC_VERSION__ 146 #define ECB_STDC_VERSION __STDC_VERSION__
101#endif 147#endif
102 148
103#define ECB_C99 (ECB_STDC_VERSION >= 199901L) 149#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
104#define ECB_C11 (ECB_STDC_VERSION >= 201112L) 150#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
151#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
105 152
106#if ECB_CPP 153#if ECB_CPP
107 #define ECB_EXTERN_C extern "C" 154 #define ECB_EXTERN_C extern "C"
108 #define ECB_EXTERN_C_BEG ECB_EXTERN_C { 155 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
109 #define ECB_EXTERN_C_END } 156 #define ECB_EXTERN_C_END }
… …
124 171
125#if ECB_NO_SMP 172#if ECB_NO_SMP
126 #define ECB_MEMORY_FENCE do { } while (0) 173 #define ECB_MEMORY_FENCE do { } while (0)
127#endif 174#endif
128 175
176/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
177#if __xlC__ && ECB_CPP
178 #include <builtins.h>
179#endif
180
181#if 1400 <= _MSC_VER
182 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
183#endif
184
129#ifndef ECB_MEMORY_FENCE 185#ifndef ECB_MEMORY_FENCE
130 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 186 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
187 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
131 #if __i386 || __i386__ 188 #if __i386 || __i386__
132 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 189 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
133 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 190 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
134 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 191 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
135 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 192 #elif ECB_GCC_AMD64
136 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 193 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
137 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 194 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
138 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 195 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
139 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 196 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
140 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 197 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
198 #elif defined __ARM_ARCH_2__ \
199 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
200 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
201 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
202 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
203 || defined __ARM_ARCH_5TEJ__
204 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
141 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 205 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
142 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 206 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
207 || defined __ARM_ARCH_6T2__
143 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 208 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
144 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 209 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
145 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 210 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
146 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 211 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
212 #elif __aarch64__
213 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
147 #elif (__sparc || __sparc__) && !__sparcv8 214 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
148 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 215 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
149 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 216 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
150 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 217 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
151 #elif defined __s390__ || defined __s390x__ 218 #elif defined __s390__ || defined __s390x__
152 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 219 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
… …
175 #if ECB_GCC_VERSION(4,7) 242 #if ECB_GCC_VERSION(4,7)
176 /* see comment below (stdatomic.h) about the C11 memory model. */ 243 /* see comment below (stdatomic.h) about the C11 memory model. */
177 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 244 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
178 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) 245 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
179 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) 246 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
247 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
180 248
181 /* The __has_feature syntax from clang is so misdesigned that we cannot use it 249 #elif ECB_CLANG_EXTENSION(c_atomic)
182 * without risking compile time errors with other compilers. We *could*
183 * define our own ecb_clang_has_feature, but I just can't be bothered to work
184 * around this shit time and again.
185 * #elif defined __clang && __has_feature (cxx_atomic)
186 * // see comment below (stdatomic.h) about the C11 memory model. 250 /* see comment below (stdatomic.h) about the C11 memory model. */
187 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 251 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
188 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) 252 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
189 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) 253 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
190 */ 254 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
191 255
192 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 256 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
193 #define ECB_MEMORY_FENCE __sync_synchronize () 257 #define ECB_MEMORY_FENCE __sync_synchronize ()
194 #elif _MSC_VER >= 1500 /* VC++ 2008 */ 258 #elif _MSC_VER >= 1500 /* VC++ 2008 */
195 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ 259 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
… …
205 #elif defined _WIN32 269 #elif defined _WIN32
206 #include <WinNT.h> 270 #include <WinNT.h>
207 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 271 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
208 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 272 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
209 #include <mbarrier.h> 273 #include <mbarrier.h>
210 #define ECB_MEMORY_FENCE __machine_rw_barrier () 274 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
211 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () 275 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
212 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () 276 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
277 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
213 #elif __xlC__ 278 #elif __xlC__
214 #define ECB_MEMORY_FENCE __sync () 279 #define ECB_MEMORY_FENCE __sync ()
215 #endif 280 #endif
216#endif 281#endif
217 282
218#ifndef ECB_MEMORY_FENCE 283#ifndef ECB_MEMORY_FENCE
219 #if ECB_C11 && !defined __STDC_NO_ATOMICS__ 284 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
220 /* we assume that these memory fences work on all variables/all memory accesses, */ 285 /* we assume that these memory fences work on all variables/all memory accesses, */
221 /* not just C11 atomics and atomic accesses */ 286 /* not just C11 atomics and atomic accesses */
222 #include <stdatomic.h> 287 #include <stdatomic.h>
223 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
224 /* any fence other than seq_cst, which isn't very efficient for us. */
225 /* Why that is, we don't know - either the C11 memory model is quite useless */
226 /* for most usages, or gcc and clang have a bug */
227 /* I *currently* lean towards the latter, and inefficiently implement */
228 /* all three of ecb's fences as a seq_cst fence */
229 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
230 /* for all __atomic_thread_fence's except seq_cst */
231 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) 288 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
289 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
290 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
232 #endif 291 #endif
233#endif 292#endif
234 293
235#ifndef ECB_MEMORY_FENCE 294#ifndef ECB_MEMORY_FENCE
236 #if !ECB_AVOID_PTHREADS 295 #if !ECB_AVOID_PTHREADS
… …
256 315
257#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE 316#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
258 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 317 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
259#endif 318#endif
260 319
320#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
321 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
322#endif
323
261/*****************************************************************************/ 324/*****************************************************************************/
262 325
263#if __cplusplus 326#if ECB_CPP
264 #define ecb_inline static inline 327 #define ecb_inline static inline
265#elif ECB_GCC_VERSION(2,5) 328#elif ECB_GCC_VERSION(2,5)
266 #define ecb_inline static __inline__ 329 #define ecb_inline static __inline__
267#elif ECB_C99 330#elif ECB_C99
268 #define ecb_inline static inline 331 #define ecb_inline static inline
… …
282 345
283#define ECB_CONCAT_(a, b) a ## b 346#define ECB_CONCAT_(a, b) a ## b
284#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 347#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
285#define ECB_STRINGIFY_(a) # a 348#define ECB_STRINGIFY_(a) # a
286#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 349#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
350#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
287 351
288#define ecb_function_ ecb_inline 352#define ecb_function_ ecb_inline
289 353
290#if ECB_GCC_VERSION(3,1) 354#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
291 #define ecb_attribute(attrlist) __attribute__(attrlist) 355 #define ecb_attribute(attrlist) __attribute__ (attrlist)
356#else
357 #define ecb_attribute(attrlist)
358#endif
359
360#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
292 #define ecb_is_constant(expr) __builtin_constant_p (expr) 361 #define ecb_is_constant(expr) __builtin_constant_p (expr)
293 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
294 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
295#else 362#else
296 #define ecb_attribute(attrlist)
297
298 /* possible C11 impl for integral types 363 /* possible C11 impl for integral types
299 typedef struct ecb_is_constant_struct ecb_is_constant_struct; 364 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
300 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ 365 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
301 366
302 #define ecb_is_constant(expr) 0 367 #define ecb_is_constant(expr) 0
368#endif
369
370#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
371 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
372#else
303 #define ecb_expect(expr,value) (expr) 373 #define ecb_expect(expr,value) (expr)
374#endif
375
376#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
377 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
378#else
304 #define ecb_prefetch(addr,rw,locality) 379 #define ecb_prefetch(addr,rw,locality)
305#endif 380#endif
306 381
307/* no emulation for ecb_decltype */ 382/* no emulation for ecb_decltype */
308#if ECB_GCC_VERSION(4,5) 383#if ECB_CPP11
384 // older implementations might have problems with decltype(x)::type, work around it
385 template<class T> struct ecb_decltype_t { typedef T type; };
309 #define ecb_decltype(x) __decltype(x) 386 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
310#elif ECB_GCC_VERSION(3,0) 387#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
311 #define ecb_decltype(x) __typeof(x) 388 #define ecb_decltype(x) __typeof__ (x)
312#endif 389#endif
313 390
391#if _MSC_VER >= 1300
392 #define ecb_deprecated __declspec (deprecated)
393#else
394 #define ecb_deprecated ecb_attribute ((__deprecated__))
395#endif
396
397#if _MSC_VER >= 1500
398 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
399#elif ECB_GCC_VERSION(4,5)
400 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
401#else
402 #define ecb_deprecated_message(msg) ecb_deprecated
403#endif
404
405#if _MSC_VER >= 1400
406 #define ecb_noinline __declspec (noinline)
407#else
314#define ecb_noinline ecb_attribute ((__noinline__)) 408 #define ecb_noinline ecb_attribute ((__noinline__))
409#endif
410
315#define ecb_unused ecb_attribute ((__unused__)) 411#define ecb_unused ecb_attribute ((__unused__))
316#define ecb_const ecb_attribute ((__const__)) 412#define ecb_const ecb_attribute ((__const__))
317#define ecb_pure ecb_attribute ((__pure__)) 413#define ecb_pure ecb_attribute ((__pure__))
318 414
319#if ECB_C11 415#if ECB_C11 || __IBMC_NORETURN
416 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
320 #define ecb_noreturn _Noreturn 417 #define ecb_noreturn _Noreturn
418#elif ECB_CPP11
419 #define ecb_noreturn [[noreturn]]
420#elif _MSC_VER >= 1200
421 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
422 #define ecb_noreturn __declspec (noreturn)
321#else 423#else
322 #define ecb_noreturn ecb_attribute ((__noreturn__)) 424 #define ecb_noreturn ecb_attribute ((__noreturn__))
323#endif 425#endif
324 426
325#if ECB_GCC_VERSION(4,3) 427#if ECB_GCC_VERSION(4,3)
… …
340/* for compatibility to the rest of the world */ 442/* for compatibility to the rest of the world */
341#define ecb_likely(expr) ecb_expect_true (expr) 443#define ecb_likely(expr) ecb_expect_true (expr)
342#define ecb_unlikely(expr) ecb_expect_false (expr) 444#define ecb_unlikely(expr) ecb_expect_false (expr)
343 445
344/* count trailing zero bits and count # of one bits */ 446/* count trailing zero bits and count # of one bits */
345#if ECB_GCC_VERSION(3,4) 447#if ECB_GCC_VERSION(3,4) \
448 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
449 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
450 && ECB_CLANG_BUILTIN(__builtin_popcount))
346 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ 451 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
347 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 452 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
348 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 453 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
349 #define ecb_ctz32(x) __builtin_ctz (x) 454 #define ecb_ctz32(x) __builtin_ctz (x)
350 #define ecb_ctz64(x) __builtin_ctzll (x) 455 #define ecb_ctz64(x) __builtin_ctzll (x)
351 #define ecb_popcount32(x) __builtin_popcount (x) 456 #define ecb_popcount32(x) __builtin_popcount (x)
352 /* no popcountll */ 457 /* no popcountll */
353#else 458#else
354 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 459 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
355 ecb_function_ int 460 ecb_function_ ecb_const int
356 ecb_ctz32 (uint32_t x) 461 ecb_ctz32 (uint32_t x)
357 { 462 {
463#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
464 unsigned long r;
465 _BitScanForward (&r, x);
466 return (int)r;
467#else
358 int r = 0; 468 int r = 0;
359 469
360 x &= ~x + 1; /* this isolates the lowest bit */ 470 x &= ~x + 1; /* this isolates the lowest bit */
361 471
362#if ECB_branchless_on_i386 472#if ECB_branchless_on_i386
… …
372 if (x & 0xff00ff00) r += 8; 482 if (x & 0xff00ff00) r += 8;
373 if (x & 0xffff0000) r += 16; 483 if (x & 0xffff0000) r += 16;
374#endif 484#endif
375 485
376 return r; 486 return r;
487#endif
377 } 488 }
378 489
379 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 490 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
380 ecb_function_ int 491 ecb_function_ ecb_const int
381 ecb_ctz64 (uint64_t x) 492 ecb_ctz64 (uint64_t x)
382 { 493 {
494#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
495 unsigned long r;
496 _BitScanForward64 (&r, x);
497 return (int)r;
498#else
383 int shift = x & 0xffffffffU ? 0 : 32; 499 int shift = x & 0xffffffff ? 0 : 32;
384 return ecb_ctz32 (x >> shift) + shift; 500 return ecb_ctz32 (x >> shift) + shift;
501#endif
385 } 502 }
386 503
387 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 504 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
388 ecb_function_ int 505 ecb_function_ ecb_const int
389 ecb_popcount32 (uint32_t x) 506 ecb_popcount32 (uint32_t x)
390 { 507 {
391 x -= (x >> 1) & 0x55555555; 508 x -= (x >> 1) & 0x55555555;
392 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 509 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
393 x = ((x >> 4) + x) & 0x0f0f0f0f; 510 x = ((x >> 4) + x) & 0x0f0f0f0f;
394 x *= 0x01010101; 511 x *= 0x01010101;
395 512
396 return x >> 24; 513 return x >> 24;
397 } 514 }
398 515
399 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 516 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
400 ecb_function_ int ecb_ld32 (uint32_t x) 517 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
401 { 518 {
519#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
520 unsigned long r;
521 _BitScanReverse (&r, x);
522 return (int)r;
523#else
402 int r = 0; 524 int r = 0;
403 525
404 if (x >> 16) { x >>= 16; r += 16; } 526 if (x >> 16) { x >>= 16; r += 16; }
405 if (x >> 8) { x >>= 8; r += 8; } 527 if (x >> 8) { x >>= 8; r += 8; }
406 if (x >> 4) { x >>= 4; r += 4; } 528 if (x >> 4) { x >>= 4; r += 4; }
407 if (x >> 2) { x >>= 2; r += 2; } 529 if (x >> 2) { x >>= 2; r += 2; }
408 if (x >> 1) { r += 1; } 530 if (x >> 1) { r += 1; }
409 531
410 return r; 532 return r;
533#endif
411 } 534 }
412 535
413 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 536 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
414 ecb_function_ int ecb_ld64 (uint64_t x) 537 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
415 { 538 {
539#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
540 unsigned long r;
541 _BitScanReverse64 (&r, x);
542 return (int)r;
543#else
416 int r = 0; 544 int r = 0;
417 545
418 if (x >> 32) { x >>= 32; r += 32; } 546 if (x >> 32) { x >>= 32; r += 32; }
419 547
420 return r + ecb_ld32 (x); 548 return r + ecb_ld32 (x);
421 }
422#endif 549#endif
550 }
551#endif
423 552
424ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 553ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
425ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 554ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
426ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 555ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
427ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } 556ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
428 557
429ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 558ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
430ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 559ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
431{ 560{
432 return ( (x * 0x0802U & 0x22110U) 561 return ( (x * 0x0802U & 0x22110U)
433 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 562 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
434} 563}
435 564
436ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 565ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
437ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 566ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
438{ 567{
439 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 568 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
440 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 569 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
441 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 570 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
442 x = ( x >> 8 ) | ( x << 8); 571 x = ( x >> 8 ) | ( x << 8);
443 572
444 return x; 573 return x;
445} 574}
446 575
447ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 576ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
448ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 577ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
449{ 578{
450 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 579 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
451 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 580 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
452 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 581 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
453 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 582 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
456 return x; 585 return x;
457} 586}
458 587
459/* popcount64 is only available on 64 bit cpus as gcc builtin */ 588/* popcount64 is only available on 64 bit cpus as gcc builtin */
460/* so for this version we are lazy */ 589/* so for this version we are lazy */
461ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 590ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
462ecb_function_ int 591ecb_function_ ecb_const int
463ecb_popcount64 (uint64_t x) 592ecb_popcount64 (uint64_t x)
464{ 593{
465 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 594 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
466} 595}
467 596
468ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 597ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
469ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 598ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
470ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 599ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
471ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 600ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
472ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 601ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
473ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 602ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
474ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 603ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
475ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 604ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
476 605
477ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 606ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
478ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 607ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
479ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 608ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
480ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 609ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
481ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 610ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
482ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 611ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
483ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 612ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
484ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 613ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
485 614
486#if ECB_GCC_VERSION(4,3) 615#if ECB_CPP
616
617inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
618inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
619inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
620inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
621
622inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
623inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
624inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
625inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
626
627inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
628inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
629inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
630inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
631
632inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
633inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
634inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
635inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
636
637inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
638inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
639inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
640
641inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
642inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
643inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
644inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
645
646inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
647inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
648inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
649inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
650
651#endif
652
653#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
654 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
655 #define ecb_bswap16(x) __builtin_bswap16 (x)
656 #else
487 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 657 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
658 #endif
488 #define ecb_bswap32(x) __builtin_bswap32 (x) 659 #define ecb_bswap32(x) __builtin_bswap32 (x)
489 #define ecb_bswap64(x) __builtin_bswap64 (x) 660 #define ecb_bswap64(x) __builtin_bswap64 (x)
661#elif _MSC_VER
662 #include <stdlib.h>
663 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
664 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
665 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
490#else 666#else
491 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 667 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
492 ecb_function_ uint16_t 668 ecb_function_ ecb_const uint16_t
493 ecb_bswap16 (uint16_t x) 669 ecb_bswap16 (uint16_t x)
494 { 670 {
495 return ecb_rotl16 (x, 8); 671 return ecb_rotl16 (x, 8);
496 } 672 }
497 673
498 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 674 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
499 ecb_function_ uint32_t 675 ecb_function_ ecb_const uint32_t
500 ecb_bswap32 (uint32_t x) 676 ecb_bswap32 (uint32_t x)
501 { 677 {
502 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 678 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
503 } 679 }
504 680
505 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 681 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
506 ecb_function_ uint64_t 682 ecb_function_ ecb_const uint64_t
507 ecb_bswap64 (uint64_t x) 683 ecb_bswap64 (uint64_t x)
508 { 684 {
509 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 685 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
510 } 686 }
511#endif 687#endif
512 688
513#if ECB_GCC_VERSION(4,5) 689#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
514 #define ecb_unreachable() __builtin_unreachable () 690 #define ecb_unreachable() __builtin_unreachable ()
515#else 691#else
516 /* this seems to work fine, but gcc always emits a warning for it :/ */ 692 /* this seems to work fine, but gcc always emits a warning for it :/ */
517 ecb_inline void ecb_unreachable (void) ecb_noreturn; 693 ecb_inline ecb_noreturn void ecb_unreachable (void);
518 ecb_inline void ecb_unreachable (void) { } 694 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
519#endif 695#endif
520 696
521/* try to tell the compiler that some condition is definitely true */ 697/* try to tell the compiler that some condition is definitely true */
522#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 698#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
523 699
524ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 700ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
525ecb_inline unsigned char 701ecb_inline ecb_const uint32_t
526ecb_byteorder_helper (void) 702ecb_byteorder_helper (void)
527{ 703{
528 /* the union code still generates code under pressure in gcc, */ 704 /* the union code still generates code under pressure in gcc, */
529 /* but less than using pointers, and always seems to */ 705 /* but less than using pointers, and always seems to */
530 /* successfully return a constant. */ 706 /* successfully return a constant. */
531 /* the reason why we have this horrible preprocessor mess */ 707 /* the reason why we have this horrible preprocessor mess */
532 /* is to avoid it in all cases, at least on common architectures */ 708 /* is to avoid it in all cases, at least on common architectures */
533 /* or when using a recent enough gcc version (>= 4.6) */ 709 /* or when using a recent enough gcc version (>= 4.6) */
534#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
535 return 0x44;
536#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 710#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
711 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
712 #define ECB_LITTLE_ENDIAN 1
537 return 0x44; 713 return 0x44332211;
538#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 714#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
715 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
716 #define ECB_BIG_ENDIAN 1
539 return 0x11; 717 return 0x11223344;
540#else 718#else
541 union 719 union
542 { 720 {
721 uint8_t c[4];
543 uint32_t i; 722 uint32_t u;
544 uint8_t c;
545 } u = { 0x11223344 }; 723 } u = { 0x11, 0x22, 0x33, 0x44 };
546 return u.c; 724 return u.u;
547#endif 725#endif
548} 726}
549 727
550ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 728ecb_inline ecb_const ecb_bool ecb_big_endian (void);
551ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 729ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
552ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 730ecb_inline ecb_const ecb_bool ecb_little_endian (void);
553ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 731ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
732
733/*****************************************************************************/
734/* unaligned load/store */
735
736ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
737ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
738ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
739
740ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
741ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
742ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
743
744ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
745ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
746ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
747
748ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
749ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
750ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
751
752ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
753ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
754ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
755
756ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
757ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
758ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
759
760ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
761ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
762ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
763
764ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
765ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
766ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
767
768ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
769ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
770ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
771
772ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
773ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
774ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
775
776#if ECB_CPP
777
778inline uint8_t ecb_bswap (uint8_t v) { return v; }
779inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
780inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
781inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
782
783template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
784template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
785template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
786template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
787template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
788template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
789template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
790template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
791
792template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
793template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
794template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
795template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
796template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
797template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
798template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
799template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
800
801#endif
802
803/*****************************************************************************/
804/* division */
554 805
555#if ECB_GCC_VERSION(3,0) || ECB_C99 806#if ECB_GCC_VERSION(3,0) || ECB_C99
807 /* C99 tightened the definition of %, so we can use a more efficient version */
556 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 808 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
557#else 809#else
558 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 810 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
559#endif 811#endif
560 812
561#if __cplusplus 813#if ECB_CPP
562 template<typename T> 814 template<typename T>
563 static inline T ecb_div_rd (T val, T div) 815 static inline T ecb_div_rd (T val, T div)
564 { 816 {
565 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 817 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
566 } 818 }
… …
571 } 823 }
572#else 824#else
573 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) 825 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
574 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) 826 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
575#endif 827#endif
828
829/*****************************************************************************/
830/* array length */
576 831
577#if ecb_cplusplus_does_not_suck 832#if ecb_cplusplus_does_not_suck
578 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ 833 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
579 template<typename T, int N> 834 template<typename T, int N>
580 static inline int ecb_array_length (const T (&arr)[N]) 835 static inline int ecb_array_length (const T (&arr)[N])
… …
583 } 838 }
584#else 839#else
585 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 840 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
586#endif 841#endif
587 842
843/*****************************************************************************/
844/* IEEE 754-2008 half float conversions */
845
846ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
847ecb_function_ ecb_const uint32_t
848ecb_binary16_to_binary32 (uint32_t x)
849{
850 unsigned int s = (x & 0x8000) << (31 - 15);
851 int e = (x >> 10) & 0x001f;
852 unsigned int m = x & 0x03ff;
853
854 if (ecb_expect_false (e == 31))
855 /* infinity or NaN */
856 e = 255 - (127 - 15);
857 else if (ecb_expect_false (!e))
858 {
859 if (ecb_expect_true (!m))
860 /* zero, handled by code below by forcing e to 0 */
861 e = 0 - (127 - 15);
862 else
863 {
864 /* subnormal, renormalise */
865 unsigned int s = 10 - ecb_ld32 (m);
866
867 m = (m << s) & 0x3ff; /* mask implicit bit */
868 e -= s - 1;
869 }
870 }
871
872 /* e and m now are normalised, or zero, (or inf or nan) */
873 e += 127 - 15;
874
875 return s | (e << 23) | (m << (23 - 10));
876}
877
878ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
879ecb_function_ ecb_const uint16_t
880ecb_binary32_to_binary16 (uint32_t x)
881{
882 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
883 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
884 unsigned int m = x & 0x007fffff;
885
886 x &= 0x7fffffff;
887
888 /* if it's within range of binary16 normals, use fast path */
889 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
890 {
891 /* mantissa round-to-even */
892 m += 0x00000fff + ((m >> (23 - 10)) & 1);
893
894 /* handle overflow */
895 if (ecb_expect_false (m >= 0x00800000))
896 {
897 m >>= 1;
898 e += 1;
899 }
900
901 return s | (e << 10) | (m >> (23 - 10));
902 }
903
904 /* handle large numbers and infinity */
905 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
906 return s | 0x7c00;
907
908 /* handle zero, subnormals and small numbers */
909 if (ecb_expect_true (x < 0x38800000))
910 {
911 /* zero */
912 if (ecb_expect_true (!x))
913 return s;
914
915 /* handle subnormals */
916
917 /* too small, will be zero */
918 if (e < (14 - 24)) /* might not be sharp, but is good enough */
919 return s;
920
921 m |= 0x00800000; /* make implicit bit explicit */
922
923 /* very tricky - we need to round to the nearest e (+10) bit value */
924 {
925 unsigned int bits = 14 - e;
926 unsigned int half = (1 << (bits - 1)) - 1;
927 unsigned int even = (m >> bits) & 1;
928
929 /* if this overflows, we will end up with a normalised number */
930 m = (m + half + even) >> bits;
931 }
932
933 return s | m;
934 }
935
936 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
937 m >>= 13;
938
939 return s | 0x7c00 | m | !m;
940}
941
588/*******************************************************************************/ 942/*******************************************************************************/
589/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ 943/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
590 944
591/* basically, everything uses "ieee pure-endian" floating point numbers */ 945/* basically, everything uses "ieee pure-endian" floating point numbers */
592/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 946/* the only noteworthy exception is ancient armle, which uses order 43218765 */
593#if 0 \ 947#if 0 \
594 || __i386 || __i386__ \ 948 || __i386 || __i386__ \
595 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 949 || ECB_GCC_AMD64 \
596 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 950 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
597 || defined __arm__ && defined __ARM_EABI__ \
598 || defined __s390__ || defined __s390x__ \ 951 || defined __s390__ || defined __s390x__ \
599 || defined __mips__ \ 952 || defined __mips__ \
600 || defined __alpha__ \ 953 || defined __alpha__ \
601 || defined __hppa__ \ 954 || defined __hppa__ \
602 || defined __ia64__ \ 955 || defined __ia64__ \
603 || defined __m68k__ \ 956 || defined __m68k__ \
604 || defined __m88k__ \ 957 || defined __m88k__ \
605 || defined __sh__ \ 958 || defined __sh__ \
606 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 959 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
960 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
961 || defined __aarch64__
607 #define ECB_STDFP 1 962 #define ECB_STDFP 1
608 #include <string.h> /* for memcpy */
609#else 963#else
610 #define ECB_STDFP 0 964 #define ECB_STDFP 0
611#endif 965#endif
612 966
613#ifndef ECB_NO_LIBM 967#ifndef ECB_NO_LIBM
… …
625 #define ECB_NAN NAN 979 #define ECB_NAN NAN
626 #else 980 #else
627 #define ECB_NAN ECB_INFINITY 981 #define ECB_NAN ECB_INFINITY
628 #endif 982 #endif
629 983
630 /* converts an ieee half/binary16 to a float */ 984 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
631 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 985 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
632 ecb_function_ float 986 #define ecb_frexpf(x,e) frexpf ((x), (e))
633 ecb_binary16_to_float (uint16_t x) 987 #else
634 { 988 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
635 int e = (x >> 10) & 0x1f; 989 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
636 int m = x & 0x3ff; 990 #endif
637 float r;
638
639 if (!e ) r = ldexpf (m , -24);
640 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
641 else if (m ) r = ECB_NAN;
642 else r = ECB_INFINITY;
643
644 return x & 0x8000 ? -r : r;
645 }
646 991
647 /* convert a float to ieee single/binary32 */ 992 /* convert a float to ieee single/binary32 */
648 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 993 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
649 ecb_function_ uint32_t 994 ecb_function_ ecb_const uint32_t
650 ecb_float_to_binary32 (float x) 995 ecb_float_to_binary32 (float x)
651 { 996 {
652 uint32_t r; 997 uint32_t r;
653 998
654 #if ECB_STDFP 999 #if ECB_STDFP
… …
661 if (x == 0e0f ) return 0x00000000U; 1006 if (x == 0e0f ) return 0x00000000U;
662 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 1007 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
663 if (x < -3.40282346638528860e+38f) return 0xff800000U; 1008 if (x < -3.40282346638528860e+38f) return 0xff800000U;
664 if (x != x ) return 0x7fbfffffU; 1009 if (x != x ) return 0x7fbfffffU;
665 1010
666 m = frexpf (x, &e) * 0x1000000U; 1011 m = ecb_frexpf (x, &e) * 0x1000000U;
667 1012
668 r = m & 0x80000000U; 1013 r = m & 0x80000000U;
669 1014
670 if (r) 1015 if (r)
671 m = -m; 1016 m = -m;
… …
683 1028
684 return r; 1029 return r;
685 } 1030 }
686 1031
687 /* converts an ieee single/binary32 to a float */ 1032 /* converts an ieee single/binary32 to a float */
688 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 1033 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
689 ecb_function_ float 1034 ecb_function_ ecb_const float
690 ecb_binary32_to_float (uint32_t x) 1035 ecb_binary32_to_float (uint32_t x)
691 { 1036 {
692 float r; 1037 float r;
693 1038
694 #if ECB_STDFP 1039 #if ECB_STDFP
… …
704 x |= 0x800000U; 1049 x |= 0x800000U;
705 else 1050 else
706 e = 1; 1051 e = 1;
707 1052
708 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 1053 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
709 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 1054 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
710 1055
711 r = neg ? -r : r; 1056 r = neg ? -r : r;
712 #endif 1057 #endif
713 1058
714 return r; 1059 return r;
715 } 1060 }
716 1061
717 /* convert a double to ieee double/binary64 */ 1062 /* convert a double to ieee double/binary64 */
718 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 1063 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
719 ecb_function_ uint64_t 1064 ecb_function_ ecb_const uint64_t
720 ecb_double_to_binary64 (double x) 1065 ecb_double_to_binary64 (double x)
721 { 1066 {
722 uint64_t r; 1067 uint64_t r;
723 1068
724 #if ECB_STDFP 1069 #if ECB_STDFP
… …
753 1098
754 return r; 1099 return r;
755 } 1100 }
756 1101
757 /* converts an ieee double/binary64 to a double */ 1102 /* converts an ieee double/binary64 to a double */
758 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 1103 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
759 ecb_function_ double 1104 ecb_function_ ecb_const double
760 ecb_binary64_to_double (uint64_t x) 1105 ecb_binary64_to_double (uint64_t x)
761 { 1106 {
762 double r; 1107 double r;
763 1108
764 #if ECB_STDFP 1109 #if ECB_STDFP
… …
782 #endif 1127 #endif
783 1128
784 return r; 1129 return r;
785 } 1130 }
786 1131
787#endif 1132 /* convert a float to ieee half/binary16 */
1133 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1134 ecb_function_ ecb_const uint16_t
1135 ecb_float_to_binary16 (float x)
1136 {
1137 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1138 }
788 1139
789#endif 1140 /* convert an ieee half/binary16 to float */
1141 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1142 ecb_function_ ecb_const float
1143 ecb_binary16_to_float (uint16_t x)
1144 {
1145 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1146 }
790 1147
1148#endif
1149
1150#endif
1151

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