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Comparing libecb/ecb.h (file contents):
Revision 1.121 by root, Sat Oct 26 09:16:15 2013 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
… …
64 #define ECB_PTRSIZE 4 75 #define ECB_PTRSIZE 4
65 #endif 76 #endif
66#endif 77#endif
67 78
68/* work around x32 idiocy by defining proper macros */ 79/* work around x32 idiocy by defining proper macros */
69#if __x86_64 || _M_AMD64 80#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
70 #if _ILP32 81 #if _ILP32
71 #define ECB_AMD64_X32 1 82 #define ECB_AMD64_X32 1
72 #else 83 #else
73 #define ECB_AMD64 1 84 #define ECB_AMD64 1
74 #endif 85 #endif
… …
79 * causing enormous grief in return for some better fake benchmark numbers. 90 * causing enormous grief in return for some better fake benchmark numbers.
80 * or so. 91 * or so.
81 * 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
82 * 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.
83 */ 94 */
84#ifndef ECB_GCC_VERSION
85 #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__
86 #define ECB_GCC_VERSION(major,minor) 0 96 #define ECB_GCC_VERSION(major,minor) 0
87 #else 97#else
88 #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)))
89 #endif 99#endif
90#endif
91 100
92#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)))
93#define ECB_C99 (__STDC_VERSION__ >= 199901L) 102
94#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
95#define ECB_CPP (__cplusplus+0) 109#define ECB_CPP (__cplusplus+0)
96#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)
97 122
98#if ECB_CPP 123#if ECB_CPP
99 #define ECB_EXTERN_C extern "C" 124 #define ECB_EXTERN_C extern "C"
100 #define ECB_EXTERN_C_BEG ECB_EXTERN_C { 125 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
101 #define ECB_EXTERN_C_END } 126 #define ECB_EXTERN_C_END }
… …
134 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 159 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
135 #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")
136 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 161 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
137 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 162 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
138 #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")
139 #elif __sparc || __sparc__ 166 #elif (__sparc || __sparc__) && !__sparcv8
140 #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")
141 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 168 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
142 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 169 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
143 #elif defined __s390__ || defined __s390x__ 170 #elif defined __s390__ || defined __s390x__
144 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
… …
165 192
166#ifndef ECB_MEMORY_FENCE 193#ifndef ECB_MEMORY_FENCE
167 #if ECB_GCC_VERSION(4,7) 194 #if ECB_GCC_VERSION(4,7)
168 /* see comment below (stdatomic.h) about the C11 memory model. */ 195 /* see comment below (stdatomic.h) about the C11 memory model. */
169 #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)
170 199
171 /* The __has_feature syntax from clang is so misdesigned that we cannot use it 200 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
172 * without risking compile time errors with other compilers. We *could* 201 * 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 202 * define our own ecb_clang_has_feature, but I just can't be bothered to work
174 * around this shit time and again. 203 * around this shit time and again.
175 * #elif defined __clang && __has_feature (cxx_atomic) 204 * #elif defined __clang && __has_feature (cxx_atomic)
176 * // see comment below (stdatomic.h) about the C11 memory model. 205 * // see comment below (stdatomic.h) about the C11 memory model.
177 * #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)
178 */ 209 */
179 210
180 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 211 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
181 #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()
182 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 219 #elif _MSC_VER >= 1400 /* VC++ 2005 */
183 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 220 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
184 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 221 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
185 #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 */
186 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 223 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
… …
206 /* 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. */
207 /* 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 */
208 /* for most usages, or gcc and clang have a bug */ 245 /* for most usages, or gcc and clang have a bug */
209 /* I *currently* lean towards the latter, and inefficiently implement */ 246 /* I *currently* lean towards the latter, and inefficiently implement */
210 /* 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 */
211 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) 250 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
212 #endif 251 #endif
213#endif 252#endif
214 253
215#ifndef ECB_MEMORY_FENCE 254#ifndef ECB_MEMORY_FENCE
… …
265#define ECB_STRINGIFY_(a) # a 304#define ECB_STRINGIFY_(a) # a
266#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 305#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
267 306
268#define ecb_function_ ecb_inline 307#define ecb_function_ ecb_inline
269 308
270#if ECB_GCC_VERSION(3,1) 309#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
271 #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)
272 #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)
273 #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)
274 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 332 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
275#else 333#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) 334 #define ecb_prefetch(addr,rw,locality)
280#endif 335#endif
281 336
282/* no emulation for ecb_decltype */ 337/* no emulation for ecb_decltype */
283#if ECB_GCC_VERSION(4,5) 338#if ECB_GCC_VERSION(4,5)
284 #define ecb_decltype(x) __decltype(x) 339 #define ecb_decltype(x) __decltype(x)
285#elif ECB_GCC_VERSION(3,0) 340#elif ECB_GCC_VERSION(3,0)
286 #define ecb_decltype(x) __typeof(x) 341 #define ecb_decltype(x) __typeof(x)
287#endif 342#endif
288 343
344#if _MSC_VER >= 1300
345 #define ecb_deprecated __declspec(deprecated)
346#else
347 #define ecb_deprecated ecb_attribute ((__deprecated__))
348#endif
349
289#define ecb_noinline ecb_attribute ((__noinline__)) 350#define ecb_noinline ecb_attribute ((__noinline__))
290#define ecb_unused ecb_attribute ((__unused__)) 351#define ecb_unused ecb_attribute ((__unused__))
291#define ecb_const ecb_attribute ((__const__)) 352#define ecb_const ecb_attribute ((__const__))
292#define ecb_pure ecb_attribute ((__pure__)) 353#define ecb_pure ecb_attribute ((__pure__))
293 354
355/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
294#if ECB_C11 356#if ECB_C11
295 #define ecb_noreturn _Noreturn 357 #define ecb_noreturn _Noreturn
296#else 358#else
297 #define ecb_noreturn ecb_attribute ((__noreturn__)) 359 #define ecb_noreturn ecb_attribute ((__noreturn__))
298#endif 360#endif
… …
315/* for compatibility to the rest of the world */ 377/* for compatibility to the rest of the world */
316#define ecb_likely(expr) ecb_expect_true (expr) 378#define ecb_likely(expr) ecb_expect_true (expr)
317#define ecb_unlikely(expr) ecb_expect_false (expr) 379#define ecb_unlikely(expr) ecb_expect_false (expr)
318 380
319/* count trailing zero bits and count # of one bits */ 381/* count trailing zero bits and count # of one bits */
320#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))
321 /* 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 */
322 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 387 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
323 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 388 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
324 #define ecb_ctz32(x) __builtin_ctz (x) 389 #define ecb_ctz32(x) __builtin_ctz (x)
325 #define ecb_ctz64(x) __builtin_ctzll (x) 390 #define ecb_ctz64(x) __builtin_ctzll (x)
… …
456ecb_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); }
457ecb_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); }
458ecb_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); }
459ecb_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); }
460 525
461#if ECB_GCC_VERSION(4,3) 526#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
462 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 527 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
463 #define ecb_bswap32(x) __builtin_bswap32 (x) 528 #define ecb_bswap32(x) __builtin_bswap32 (x)
464 #define ecb_bswap64(x) __builtin_bswap64 (x) 529 #define ecb_bswap64(x) __builtin_bswap64 (x)
465#else 530#else
466 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 531 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
… …
483 { 548 {
484 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 549 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
485 } 550 }
486#endif 551#endif
487 552
488#if ECB_GCC_VERSION(4,5) 553#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
489 #define ecb_unreachable() __builtin_unreachable () 554 #define ecb_unreachable() __builtin_unreachable ()
490#else 555#else
491 /* 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 :/ */
492 ecb_inline void ecb_unreachable (void) ecb_noreturn; 557 ecb_inline void ecb_unreachable (void) ecb_noreturn;
493 ecb_inline void ecb_unreachable (void) { } 558 ecb_inline void ecb_unreachable (void) { }
… …
567/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 632/* the only noteworthy exception is ancient armle, which uses order 43218765 */
568#if 0 \ 633#if 0 \
569 || __i386 || __i386__ \ 634 || __i386 || __i386__ \
570 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 635 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
571 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 636 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
572 || defined __arm__ && defined __ARM_EABI__ \
573 || defined __s390__ || defined __s390x__ \ 637 || defined __s390__ || defined __s390x__ \
574 || defined __mips__ \ 638 || defined __mips__ \
575 || defined __alpha__ \ 639 || defined __alpha__ \
576 || defined __hppa__ \ 640 || defined __hppa__ \
577 || defined __ia64__ \ 641 || defined __ia64__ \
578 || defined __m68k__ \ 642 || defined __m68k__ \
579 || defined __m88k__ \ 643 || defined __m88k__ \
580 || defined __sh__ \ 644 || defined __sh__ \
581 || 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__
582 #define ECB_STDFP 1 648 #define ECB_STDFP 1
583 #include <string.h> /* for memcpy */ 649 #include <string.h> /* for memcpy */
584#else 650#else
585 #define ECB_STDFP 0 651 #define ECB_STDFP 0
586#endif 652#endif
587 653
588#ifndef ECB_NO_LIBM 654#ifndef ECB_NO_LIBM
589 655
590 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ 656 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
591 657
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
592 #ifdef NEN 665 #ifdef NAN
593 #define ECB_NAN NAN 666 #define ECB_NAN NAN
594 #else 667 #else
595 #define ECB_NAN INFINITY 668 #define ECB_NAN ECB_INFINITY
596 #endif 669 #endif
597 670
598 /* converts an ieee half/binary16 to a float */ 671 /* converts an ieee half/binary16 to a float */
599 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 672 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
600 ecb_function_ float 673 ecb_function_ float
… …
605 float r; 678 float r;
606 679
607 if (!e ) r = ldexpf (m , -24); 680 if (!e ) r = ldexpf (m , -24);
608 else if (e != 31) r = ldexpf (m + 0x400, e - 25); 681 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
609 else if (m ) r = ECB_NAN; 682 else if (m ) r = ECB_NAN;
610 else r = INFINITY; 683 else r = ECB_INFINITY;
611 684
612 return x & 0x8000 ? -r : r; 685 return x & 0x8000 ? -r : r;
613 } 686 }
614 687
615 /* convert a float to ieee single/binary32 */ 688 /* convert a float to ieee single/binary32 */

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