ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/CBOR-XS/ecb.h
(Generate patch)

Comparing CBOR-XS/ecb.h (file contents):
Revision 1.8 by root, Tue Feb 18 22:12:12 2014 UTC vs.
Revision 1.9 by root, Sat Oct 25 06:36:34 2014 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2013 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 0x00010003 45#define ECB_VERSION 0x00010004
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;
… …
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
100
101#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
102
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
109#if __clang__ && defined __has_extension
110 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
111#else
112 #define ECB_CLANG_EXTENSION(x) 0
90#endif 113#endif
91 114
92#define ECB_CPP (__cplusplus+0) 115#define ECB_CPP (__cplusplus+0)
93#define ECB_CPP11 (__cplusplus >= 201103L) 116#define ECB_CPP11 (__cplusplus >= 201103L)
94 117
… …
142 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 165 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
143 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 166 #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__ \ 167 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
145 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 168 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
146 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 169 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
170 #elif __aarch64__
171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
147 #elif (__sparc || __sparc__) && !__sparcv8 172 #elif (__sparc || __sparc__) && !__sparcv8
148 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 173 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
149 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 174 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
150 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 175 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
151 #elif defined __s390__ || defined __s390x__ 176 #elif defined __s390__ || defined __s390x__
… …
176 /* see comment below (stdatomic.h) about the C11 memory model. */ 201 /* see comment below (stdatomic.h) about the C11 memory model. */
177 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 202 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
178 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) 203 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
179 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) 204 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
180 205
181 /* The __has_feature syntax from clang is so misdesigned that we cannot use it 206 #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. 207 /* see comment below (stdatomic.h) about the C11 memory model. */
187 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 208 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
188 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) 209 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
189 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) 210 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
190 */
191 211
192 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 212 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
193 #define ECB_MEMORY_FENCE __sync_synchronize () 213 #define ECB_MEMORY_FENCE __sync_synchronize ()
194 #elif _MSC_VER >= 1500 /* VC++ 2008 */ 214 #elif _MSC_VER >= 1500 /* VC++ 2008 */
195 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ 215 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
… …
258 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 278 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
259#endif 279#endif
260 280
261/*****************************************************************************/ 281/*****************************************************************************/
262 282
263#if __cplusplus 283#if ECB_CPP
264 #define ecb_inline static inline 284 #define ecb_inline static inline
265#elif ECB_GCC_VERSION(2,5) 285#elif ECB_GCC_VERSION(2,5)
266 #define ecb_inline static __inline__ 286 #define ecb_inline static __inline__
267#elif ECB_C99 287#elif ECB_C99
268 #define ecb_inline static inline 288 #define ecb_inline static inline
… …
285#define ECB_STRINGIFY_(a) # a 305#define ECB_STRINGIFY_(a) # a
286#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 306#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
287 307
288#define ecb_function_ ecb_inline 308#define ecb_function_ ecb_inline
289 309
290#if ECB_GCC_VERSION(3,1) 310#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
291 #define ecb_attribute(attrlist) __attribute__(attrlist) 311 #define ecb_attribute(attrlist) __attribute__ (attrlist)
312#else
313 #define ecb_attribute(attrlist)
314#endif
315
316#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
292 #define ecb_is_constant(expr) __builtin_constant_p (expr) 317 #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 318#else
296 #define ecb_attribute(attrlist)
297
298 /* possible C11 impl for integral types 319 /* possible C11 impl for integral types
299 typedef struct ecb_is_constant_struct ecb_is_constant_struct; 320 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)) */ 321 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
301 322
302 #define ecb_is_constant(expr) 0 323 #define ecb_is_constant(expr) 0
324#endif
325
326#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
327 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
328#else
303 #define ecb_expect(expr,value) (expr) 329 #define ecb_expect(expr,value) (expr)
330#endif
331
332#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
333 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
334#else
304 #define ecb_prefetch(addr,rw,locality) 335 #define ecb_prefetch(addr,rw,locality)
305#endif 336#endif
306 337
307/* no emulation for ecb_decltype */ 338/* no emulation for ecb_decltype */
308#if ECB_GCC_VERSION(4,5) 339#if ECB_CPP11
340 // older implementations might have problems with decltype(x)::type, work around it
341 template<class T> struct ecb_decltype_t { typedef T type; };
309 #define ecb_decltype(x) __decltype(x) 342 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
310#elif ECB_GCC_VERSION(3,0) 343#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
311 #define ecb_decltype(x) __typeof(x) 344 #define ecb_decltype(x) __typeof__ (x)
345#endif
346
347#if _MSC_VER >= 1300
348 #define ecb_deprecated __declspec (deprecated)
349#else
350 #define ecb_deprecated ecb_attribute ((__deprecated__))
312#endif 351#endif
313 352
314#define ecb_noinline ecb_attribute ((__noinline__)) 353#define ecb_noinline ecb_attribute ((__noinline__))
315#define ecb_unused ecb_attribute ((__unused__)) 354#define ecb_unused ecb_attribute ((__unused__))
316#define ecb_const ecb_attribute ((__const__)) 355#define ecb_const ecb_attribute ((__const__))
317#define ecb_pure ecb_attribute ((__pure__)) 356#define ecb_pure ecb_attribute ((__pure__))
318 357
319#if ECB_C11 358/* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
359#if ECB_C11 || __IBMC_NORETURN
360 /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
320 #define ecb_noreturn _Noreturn 361 #define ecb_noreturn _Noreturn
321#else 362#else
322 #define ecb_noreturn ecb_attribute ((__noreturn__)) 363 #define ecb_noreturn ecb_attribute ((__noreturn__))
323#endif 364#endif
324 365
… …
340/* for compatibility to the rest of the world */ 381/* for compatibility to the rest of the world */
341#define ecb_likely(expr) ecb_expect_true (expr) 382#define ecb_likely(expr) ecb_expect_true (expr)
342#define ecb_unlikely(expr) ecb_expect_false (expr) 383#define ecb_unlikely(expr) ecb_expect_false (expr)
343 384
344/* count trailing zero bits and count # of one bits */ 385/* count trailing zero bits and count # of one bits */
345#if ECB_GCC_VERSION(3,4) 386#if ECB_GCC_VERSION(3,4) \
387 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
388 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
389 && ECB_CLANG_BUILTIN(__builtin_popcount))
346 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ 390 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
347 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 391 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
348 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 392 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
349 #define ecb_ctz32(x) __builtin_ctz (x) 393 #define ecb_ctz32(x) __builtin_ctz (x)
350 #define ecb_ctz64(x) __builtin_ctzll (x) 394 #define ecb_ctz64(x) __builtin_ctzll (x)
… …
481ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 525ecb_inline 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); } 526ecb_inline 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); } 527ecb_inline 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); } 528ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
485 529
486#if ECB_GCC_VERSION(4,3) 530#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
487 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 531 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
488 #define ecb_bswap32(x) __builtin_bswap32 (x) 532 #define ecb_bswap32(x) __builtin_bswap32 (x)
489 #define ecb_bswap64(x) __builtin_bswap64 (x) 533 #define ecb_bswap64(x) __builtin_bswap64 (x)
490#else 534#else
491 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 535 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
… …
508 { 552 {
509 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 553 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
510 } 554 }
511#endif 555#endif
512 556
513#if ECB_GCC_VERSION(4,5) 557#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
514 #define ecb_unreachable() __builtin_unreachable () 558 #define ecb_unreachable() __builtin_unreachable ()
515#else 559#else
516 /* this seems to work fine, but gcc always emits a warning for it :/ */ 560 /* this seems to work fine, but gcc always emits a warning for it :/ */
517 ecb_inline void ecb_unreachable (void) ecb_noreturn; 561 ecb_inline void ecb_unreachable (void) ecb_noreturn;
518 ecb_inline void ecb_unreachable (void) { } 562 ecb_inline void ecb_unreachable (void) { }
… …
556 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 600 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
557#else 601#else
558 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 602 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
559#endif 603#endif
560 604
561#if __cplusplus 605#if ECB_CPP
562 template<typename T> 606 template<typename T>
563 static inline T ecb_div_rd (T val, T div) 607 static inline T ecb_div_rd (T val, T div)
564 { 608 {
565 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 609 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
566 } 610 }
… …
592/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 636/* the only noteworthy exception is ancient armle, which uses order 43218765 */
593#if 0 \ 637#if 0 \
594 || __i386 || __i386__ \ 638 || __i386 || __i386__ \
595 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 639 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
596 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 640 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
597 || defined __arm__ && defined __ARM_EABI__ \
598 || defined __s390__ || defined __s390x__ \ 641 || defined __s390__ || defined __s390x__ \
599 || defined __mips__ \ 642 || defined __mips__ \
600 || defined __alpha__ \ 643 || defined __alpha__ \
601 || defined __hppa__ \ 644 || defined __hppa__ \
602 || defined __ia64__ \ 645 || defined __ia64__ \
603 || defined __m68k__ \ 646 || defined __m68k__ \
604 || defined __m88k__ \ 647 || defined __m88k__ \
605 || defined __sh__ \ 648 || defined __sh__ \
606 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 649 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
650 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
651 || defined __aarch64__
607 #define ECB_STDFP 1 652 #define ECB_STDFP 1
608 #include <string.h> /* for memcpy */ 653 #include <string.h> /* for memcpy */
609#else 654#else
610 #define ECB_STDFP 0 655 #define ECB_STDFP 0
611#endif 656#endif
… …
625 #define ECB_NAN NAN 670 #define ECB_NAN NAN
626 #else 671 #else
627 #define ECB_NAN ECB_INFINITY 672 #define ECB_NAN ECB_INFINITY
628 #endif 673 #endif
629 674
675 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
676 #define ecb_ldexpf(x,e) ldexpf (x, e)
677 #else
678 #define ecb_ldexpf(x,e) (float) ldexp ((double)(x), e)
679 #endif
680
630 /* converts an ieee half/binary16 to a float */ 681 /* converts an ieee half/binary16 to a float */
631 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 682 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
632 ecb_function_ float 683 ecb_function_ float
633 ecb_binary16_to_float (uint16_t x) 684 ecb_binary16_to_float (uint16_t x)
634 { 685 {
635 int e = (x >> 10) & 0x1f; 686 int e = (x >> 10) & 0x1f;
636 int m = x & 0x3ff; 687 int m = x & 0x3ff;
637 float r; 688 float r;
638 689
639 if (!e ) r = ldexpf (m , -24); 690 if (!e ) r = ecb_ldexpf (m , -24);
640 else if (e != 31) r = ldexpf (m + 0x400, e - 25); 691 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
641 else if (m ) r = ECB_NAN; 692 else if (m ) r = ECB_NAN;
642 else r = ECB_INFINITY; 693 else r = ECB_INFINITY;
643 694
644 return x & 0x8000 ? -r : r; 695 return x & 0x8000 ? -r : r;
645 } 696 }
… …
704 x |= 0x800000U; 755 x |= 0x800000U;
705 else 756 else
706 e = 1; 757 e = 1;
707 758
708 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 759 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
709 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 760 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
710 761
711 r = neg ? -r : r; 762 r = neg ? -r : r;
712 #endif 763 #endif
713 764
714 return r; 765 return r;

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines