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Comparing libecb/ecb.h (file contents):
Revision 1.109 by root, Fri Jun 29 14:05:50 2012 UTC vs.
Revision 1.139 by root, Tue Oct 14 14:39:06 2014 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 (©) 2009-2014 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 0x00010001 45#define ECB_VERSION 0x00010003
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;
39 typedef signed short int16_t; 50 typedef signed short int16_t;
… …
63 #else 74 #else
64 #define ECB_PTRSIZE 4 75 #define ECB_PTRSIZE 4
65 #endif 76 #endif
66#endif 77#endif
67 78
79/* work around x32 idiocy by defining proper macros */
80#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
81 #if _ILP32
82 #define ECB_AMD64_X32 1
83 #else
84 #define ECB_AMD64 1
85 #endif
86#endif
87
68/* many compilers define _GNUC_ to some versions but then only implement 88/* many compilers define _GNUC_ to some versions but then only implement
69 * what their idiot authors think are the "more important" extensions, 89 * what their idiot authors think are the "more important" extensions,
70 * causing enormous grief in return for some better fake benchmark numbers. 90 * causing enormous grief in return for some better fake benchmark numbers.
71 * or so. 91 * or so.
72 * we try to detect these and simply assume they are not gcc - if they have 92 * we try to detect these and simply assume they are not gcc - if they have
73 * an issue with that they should have done it right in the first place. 93 * an issue with that they should have done it right in the first place.
74 */ 94 */
75#ifndef ECB_GCC_VERSION
76 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ 95#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
77 #define ECB_GCC_VERSION(major,minor) 0 96 #define ECB_GCC_VERSION(major,minor) 0
78 #else 97#else
79 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 98 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
80 #endif 99#endif
81#endif
82 100
83#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ 101#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
84#define ECB_C99 (__STDC_VERSION__ >= 199901L) 102
85#define ECB_C11 (__STDC_VERSION__ >= 201112L) 103#if __clang__ && defined(__has_builtin)
104 #define ECB_CLANG_BUILTIN(x) __has_builtin(x)
105#else
106 #define ECB_CLANG_BUILTIN(x) 0
107#endif
108
86#define ECB_CPP (__cplusplus+0) 109#define ECB_CPP (__cplusplus+0)
87#define ECB_CPP11 (__cplusplus >= 201103L) 110#define ECB_CPP11 (__cplusplus >= 201103L)
111
112#if ECB_CPP
113 #define ECB_C 0
114 #define ECB_STDC_VERSION 0
115#else
116 #define ECB_C 1
117 #define ECB_STDC_VERSION __STDC_VERSION__
118#endif
119
120#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
121#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
88 122
89#if ECB_CPP 123#if ECB_CPP
90 #define ECB_EXTERN_C extern "C" 124 #define ECB_EXTERN_C extern "C"
91 #define ECB_EXTERN_C_BEG ECB_EXTERN_C { 125 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
92 #define ECB_EXTERN_C_END } 126 #define ECB_EXTERN_C_END }
… …
125 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 159 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
126 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 160 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
127 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 161 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
128 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 162 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
129 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
164 #elif __aarch64__
165 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
130 #elif __sparc || __sparc__ 166 #elif (__sparc || __sparc__) && !__sparcv8
131 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 167 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
132 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 168 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
133 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 169 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
134 #elif defined __s390__ || defined __s390x__ 170 #elif defined __s390__ || defined __s390x__
135 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
136 #elif defined __mips__ 172 #elif defined __mips__
173 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
174 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
137 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 175 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
138 #elif defined __alpha__ 176 #elif defined __alpha__
139 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") 177 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
140 #elif defined __hppa__ 178 #elif defined __hppa__
141 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") 179 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
142 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 180 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
143 #elif defined __ia64__ 181 #elif defined __ia64__
144 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") 182 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
183 #elif defined __m68k__
184 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
185 #elif defined __m88k__
186 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
187 #elif defined __sh__
188 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
145 #endif 189 #endif
146 #endif 190 #endif
147#endif 191#endif
148 192
149#ifndef ECB_MEMORY_FENCE 193#ifndef ECB_MEMORY_FENCE
150 #if ECB_GCC_VERSION(4,7) 194 #if ECB_GCC_VERSION(4,7)
151 /* see comment below (stdatomic.h) about the C11 memory model. */ 195 /* see comment below (stdatomic.h) about the C11 memory model. */
152 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 196 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
197 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
198 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
199
200 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
201 * without risking compile time errors with other compilers. We *could*
202 * define our own ecb_clang_has_feature, but I just can't be bothered to work
203 * around this shit time and again.
153 /*#elif defined __clang && __has_feature (cxx_atomic)*/ 204 * #elif defined __clang && __has_feature (cxx_atomic)
154 /* see comment below (stdatomic.h) about the C11 memory model. */ 205 * // see comment below (stdatomic.h) about the C11 memory model.
155 /*#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)*/ 206 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
207 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
208 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
209 */
210
156 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 211 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
157 #define ECB_MEMORY_FENCE __sync_synchronize () 212 #define ECB_MEMORY_FENCE __sync_synchronize ()
213 #elif _MSC_VER >= 1500 /* VC++ 2008 */
214 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
215 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
216 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
217 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
218 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
158 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 219 #elif _MSC_VER >= 1400 /* VC++ 2005 */
159 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 220 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
160 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 221 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
161 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 222 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
162 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 223 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
… …
182 /* any fence other than seq_cst, which isn't very efficient for us. */ 243 /* any fence other than seq_cst, which isn't very efficient for us. */
183 /* Why that is, we don't know - either the C11 memory model is quite useless */ 244 /* Why that is, we don't know - either the C11 memory model is quite useless */
184 /* for most usages, or gcc and clang have a bug */ 245 /* for most usages, or gcc and clang have a bug */
185 /* I *currently* lean towards the latter, and inefficiently implement */ 246 /* I *currently* lean towards the latter, and inefficiently implement */
186 /* all three of ecb's fences as a seq_cst fence */ 247 /* all three of ecb's fences as a seq_cst fence */
248 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
249 /* for all __atomic_thread_fence's except seq_cst */
187 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) 250 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
188 #endif 251 #endif
189#endif 252#endif
190 253
191#ifndef ECB_MEMORY_FENCE 254#ifndef ECB_MEMORY_FENCE
… …
241#define ECB_STRINGIFY_(a) # a 304#define ECB_STRINGIFY_(a) # a
242#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 305#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
243 306
244#define ecb_function_ ecb_inline 307#define ecb_function_ ecb_inline
245 308
246#if ECB_GCC_VERSION(3,1) 309#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
247 #define ecb_attribute(attrlist) __attribute__(attrlist) 310 #define ecb_attribute(attrlist) __attribute__(attrlist)
311#else
312 #define ecb_attribute(attrlist)
313#endif
314
315#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
248 #define ecb_is_constant(expr) __builtin_constant_p (expr) 316 #define ecb_is_constant(expr) __builtin_constant_p (expr)
317#else
318 /* possible C11 impl for integral types
319 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
320 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
321
322 #define ecb_is_constant(expr) 0
323#endif
324
325#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
249 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 326 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
327#else
328 #define ecb_expect(expr,value) (expr)
329#endif
330
331#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
250 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 332 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
251#else 333#else
252 #define ecb_attribute(attrlist)
253 #define ecb_is_constant(expr) 0
254 #define ecb_expect(expr,value) (expr)
255 #define ecb_prefetch(addr,rw,locality) 334 #define ecb_prefetch(addr,rw,locality)
256#endif 335#endif
257 336
258/* no emulation for ecb_decltype */ 337/* no emulation for ecb_decltype */
259#if ECB_GCC_VERSION(4,5) 338#if ECB_GCC_VERSION(4,5)
260 #define ecb_decltype(x) __decltype(x) 339 #define ecb_decltype(x) __decltype(x)
261#elif ECB_GCC_VERSION(3,0) 340#elif ECB_GCC_VERSION(3,0)
262 #define ecb_decltype(x) __typeof(x) 341 #define ecb_decltype(x) __typeof(x)
263#endif 342#endif
264 343
344#if _MSC_VER >= 1300
345 #define ecb_deprecated __declspec(deprecated)
346#else
347 #define ecb_deprecated ecb_attribute ((__deprecated__))
348#endif
349
265#define ecb_noinline ecb_attribute ((__noinline__)) 350#define ecb_noinline ecb_attribute ((__noinline__))
266#define ecb_unused ecb_attribute ((__unused__)) 351#define ecb_unused ecb_attribute ((__unused__))
267#define ecb_const ecb_attribute ((__const__)) 352#define ecb_const ecb_attribute ((__const__))
268#define ecb_pure ecb_attribute ((__pure__)) 353#define ecb_pure ecb_attribute ((__pure__))
269 354
355/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
270#if ECB_C11 356#if ECB_C11
271 #define ecb_noreturn _Noreturn 357 #define ecb_noreturn _Noreturn
272#else 358#else
273 #define ecb_noreturn ecb_attribute ((__noreturn__)) 359 #define ecb_noreturn ecb_attribute ((__noreturn__))
274#endif 360#endif
… …
291/* for compatibility to the rest of the world */ 377/* for compatibility to the rest of the world */
292#define ecb_likely(expr) ecb_expect_true (expr) 378#define ecb_likely(expr) ecb_expect_true (expr)
293#define ecb_unlikely(expr) ecb_expect_false (expr) 379#define ecb_unlikely(expr) ecb_expect_false (expr)
294 380
295/* count trailing zero bits and count # of one bits */ 381/* count trailing zero bits and count # of one bits */
296#if ECB_GCC_VERSION(3,4) 382#if ECB_GCC_VERSION(3,4) \
383 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
384 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
385 && ECB_CLANG_BUILTIN(__builtin_popcount))
297 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ 386 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
298 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 387 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
299 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 388 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
300 #define ecb_ctz32(x) __builtin_ctz (x) 389 #define ecb_ctz32(x) __builtin_ctz (x)
301 #define ecb_ctz64(x) __builtin_ctzll (x) 390 #define ecb_ctz64(x) __builtin_ctzll (x)
… …
432ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 521ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
433ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 522ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
434ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 523ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
435ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 524ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
436 525
437#if ECB_GCC_VERSION(4,3) 526#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
438 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 527 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
439 #define ecb_bswap32(x) __builtin_bswap32 (x) 528 #define ecb_bswap32(x) __builtin_bswap32 (x)
440 #define ecb_bswap64(x) __builtin_bswap64 (x) 529 #define ecb_bswap64(x) __builtin_bswap64 (x)
441#else 530#else
442 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 531 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
… …
459 { 548 {
460 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 549 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
461 } 550 }
462#endif 551#endif
463 552
464#if ECB_GCC_VERSION(4,5) 553#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
465 #define ecb_unreachable() __builtin_unreachable () 554 #define ecb_unreachable() __builtin_unreachable ()
466#else 555#else
467 /* this seems to work fine, but gcc always emits a warning for it :/ */ 556 /* this seems to work fine, but gcc always emits a warning for it :/ */
468 ecb_inline void ecb_unreachable (void) ecb_noreturn; 557 ecb_inline void ecb_unreachable (void) ecb_noreturn;
469 ecb_inline void ecb_unreachable (void) { } 558 ecb_inline void ecb_unreachable (void) { }
… …
475ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 564ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
476ecb_inline unsigned char 565ecb_inline unsigned char
477ecb_byteorder_helper (void) 566ecb_byteorder_helper (void)
478{ 567{
479 /* the union code still generates code under pressure in gcc, */ 568 /* the union code still generates code under pressure in gcc, */
480 /* but less than using pointers, and always seem to */ 569 /* but less than using pointers, and always seems to */
481 /* successfully return a constant. */ 570 /* successfully return a constant. */
482 /* the reason why we have this horrible preprocessor mess */ 571 /* the reason why we have this horrible preprocessor mess */
483 /* is to avoid it in all cases, at least on common architectures */ 572 /* is to avoid it in all cases, at least on common architectures */
484 /* and yes, gcc defines __BYTE_ORDER__, g++ does not */ 573 /* or when using a recent enough gcc version (>= 4.6) */
485#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 574#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
486 return 0x44; 575 return 0x44;
487#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 576#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
488 return 0x44; 577 return 0x44;
489#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 578#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
490 retrurn 0x11; 579 return 0x11;
491#else 580#else
492 union 581 union
493 { 582 {
494 uint32_t i; 583 uint32_t i;
495 uint8_t c; 584 uint8_t c;
… …
543/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 632/* the only noteworthy exception is ancient armle, which uses order 43218765 */
544#if 0 \ 633#if 0 \
545 || __i386 || __i386__ \ 634 || __i386 || __i386__ \
546 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 635 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
547 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 636 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
548 || defined __arm__ && defined __ARM_EABI__ \
549 || defined __s390__ || defined __s390x__ \ 637 || defined __s390__ || defined __s390x__ \
550 || defined __mips__ \ 638 || defined __mips__ \
551 || defined __alpha__ \ 639 || defined __alpha__ \
552 || defined __hppa__ \ 640 || defined __hppa__ \
553 || defined __ia64__ \ 641 || defined __ia64__ \
642 || defined __m68k__ \
643 || defined __m88k__ \
644 || defined __sh__ \
554 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 645 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
646 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
647 || defined __aarch64__
555 #define ECB_STDFP 1 648 #define ECB_STDFP 1
556 #include <string.h> /* for memcpy */ 649 #include <string.h> /* for memcpy */
557#else 650#else
558 #define ECB_STDFP 0 651 #define ECB_STDFP 0
559 #include <math.h> /* for frexp*, ldexp* */
560#endif 652#endif
561 653
562#ifndef ECB_NO_LIBM 654#ifndef ECB_NO_LIBM
655
656 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
657
658 /* only the oldest of old doesn't have this one. solaris. */
659 #ifdef INFINITY
660 #define ECB_INFINITY INFINITY
661 #else
662 #define ECB_INFINITY HUGE_VAL
663 #endif
664
665 #ifdef NAN
666 #define ECB_NAN NAN
667 #else
668 #define ECB_NAN ECB_INFINITY
669 #endif
670
671 /* converts an ieee half/binary16 to a float */
672 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
673 ecb_function_ float
674 ecb_binary16_to_float (uint16_t x)
675 {
676 int e = (x >> 10) & 0x1f;
677 int m = x & 0x3ff;
678 float r;
679
680 if (!e ) r = ldexpf (m , -24);
681 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
682 else if (m ) r = ECB_NAN;
683 else r = ECB_INFINITY;
684
685 return x & 0x8000 ? -r : r;
686 }
563 687
564 /* convert a float to ieee single/binary32 */ 688 /* convert a float to ieee single/binary32 */
565 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 689 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
566 ecb_function_ uint32_t 690 ecb_function_ uint32_t
567 ecb_float_to_binary32 (float x) 691 ecb_float_to_binary32 (float x)

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