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

Comparing libecb/ecb.h (file contents):
Revision 1.137 by root, Tue Oct 14 14:01:07 2014 UTC vs.
Revision 1.168 by root, Sat Nov 21 18:09:36 2015 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de> 4 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
5 * Copyright (©) 2011 Emanuele Giaquinta 5 * Copyright (©) 2011 Emanuele Giaquinta
6 * All rights reserved. 6 * All rights reserved.
7 * 7 *
8 * Redistribution and use in source and binary forms, with or without modifica- 8 * Redistribution and use in source and binary forms, with or without modifica-
9 * tion, are permitted provided that the following conditions are met: 9 * tion, are permitted provided that the following conditions are met:
… …
40 40
41#ifndef ECB_H 41#ifndef ECB_H
42#define ECB_H 42#define ECB_H
43 43
44/* 16 bits major, 16 bits minor */ 44/* 16 bits major, 16 bits minor */
45#define ECB_VERSION 0x00010003 45#define ECB_VERSION 0x00010005
46 46
47#ifdef _WIN32 47#ifdef _WIN32
48 typedef signed char int8_t; 48 typedef signed char int8_t;
49 typedef unsigned char uint8_t; 49 typedef unsigned char uint8_t;
50 typedef signed short int16_t; 50 typedef signed short int16_t;
… …
74 #else 74 #else
75 #define ECB_PTRSIZE 4 75 #define ECB_PTRSIZE 4
76 #endif 76 #endif
77#endif 77#endif
78 78
79#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
80#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
81
79/* work around x32 idiocy by defining proper macros */ 82/* work around x32 idiocy by defining proper macros */
80#if __amd64 || __x86_64 || _M_AMD64 || _M_X64 83#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
81 #if _ILP32 84 #if _ILP32
82 #define ECB_AMD64_X32 1 85 #define ECB_AMD64_X32 1
83 #else 86 #else
84 #define ECB_AMD64 1 87 #define ECB_AMD64 1
85 #endif 88 #endif
… …
96 #define ECB_GCC_VERSION(major,minor) 0 99 #define ECB_GCC_VERSION(major,minor) 0
97#else 100#else
98 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 101 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
99#endif 102#endif
100 103
104#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
105
106#if __clang__ && defined __has_builtin
107 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
108#else
109 #define ECB_CLANG_BUILTIN(x) 0
110#endif
111
112#if __clang__ && defined __has_extension
113 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
114#else
115 #define ECB_CLANG_EXTENSION(x) 0
116#endif
117
101#define ECB_CPP (__cplusplus+0) 118#define ECB_CPP (__cplusplus+0)
102#define ECB_CPP11 (__cplusplus >= 201103L) 119#define ECB_CPP11 (__cplusplus >= 201103L)
103 120
104#if ECB_CPP 121#if ECB_CPP
105 #define ECB_C 0 122 #define ECB_C 0
… …
131 #define ECB_NO_SMP 1 148 #define ECB_NO_SMP 1
132#endif 149#endif
133 150
134#if ECB_NO_SMP 151#if ECB_NO_SMP
135 #define ECB_MEMORY_FENCE do { } while (0) 152 #define ECB_MEMORY_FENCE do { } while (0)
153#endif
154
155/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
156#if __xlC__ && ECB_CPP
157 #include <builtins.h>
136#endif 158#endif
137 159
138#ifndef ECB_MEMORY_FENCE 160#ifndef ECB_MEMORY_FENCE
139 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 161 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
140 #if __i386 || __i386__ 162 #if __i386 || __i386__
141 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
142 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 164 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
143 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 165 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
144 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 166 #elif ECB_GCC_AMD64
145 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 167 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
146 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 168 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
147 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 169 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
148 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 170 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
149 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
… …
153 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 175 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
154 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 176 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
155 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 177 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
156 #elif __aarch64__ 178 #elif __aarch64__
157 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") 179 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
158 #elif (__sparc || __sparc__) && !__sparcv8 180 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
159 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 181 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
160 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 182 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
161 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 183 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
162 #elif defined __s390__ || defined __s390x__ 184 #elif defined __s390__ || defined __s390x__
163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 185 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
… …
187 /* see comment below (stdatomic.h) about the C11 memory model. */ 209 /* see comment below (stdatomic.h) about the C11 memory model. */
188 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 210 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
189 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) 211 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
190 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) 212 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
191 213
192 /* The __has_feature syntax from clang is so misdesigned that we cannot use it 214 #elif ECB_CLANG_EXTENSION(c_atomic)
193 * without risking compile time errors with other compilers. We *could*
194 * define our own ecb_clang_has_feature, but I just can't be bothered to work
195 * around this shit time and again.
196 * #elif defined __clang && __has_feature (cxx_atomic)
197 * // see comment below (stdatomic.h) about the C11 memory model. 215 /* see comment below (stdatomic.h) about the C11 memory model. */
198 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 216 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
199 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) 217 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
200 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) 218 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
201 */
202 219
203 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 220 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
204 #define ECB_MEMORY_FENCE __sync_synchronize () 221 #define ECB_MEMORY_FENCE __sync_synchronize ()
205 #elif _MSC_VER >= 1500 /* VC++ 2008 */ 222 #elif _MSC_VER >= 1500 /* VC++ 2008 */
206 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ 223 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
… …
269 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 286 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
270#endif 287#endif
271 288
272/*****************************************************************************/ 289/*****************************************************************************/
273 290
274#if __cplusplus 291#if ECB_CPP
275 #define ecb_inline static inline 292 #define ecb_inline static inline
276#elif ECB_GCC_VERSION(2,5) 293#elif ECB_GCC_VERSION(2,5)
277 #define ecb_inline static __inline__ 294 #define ecb_inline static __inline__
278#elif ECB_C99 295#elif ECB_C99
279 #define ecb_inline static inline 296 #define ecb_inline static inline
… …
293 310
294#define ECB_CONCAT_(a, b) a ## b 311#define ECB_CONCAT_(a, b) a ## b
295#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 312#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
296#define ECB_STRINGIFY_(a) # a 313#define ECB_STRINGIFY_(a) # a
297#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 314#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
315#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
298 316
299#define ecb_function_ ecb_inline 317#define ecb_function_ ecb_inline
300 318
301#if ECB_GCC_VERSION(3,1) 319#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
302 #define ecb_attribute(attrlist) __attribute__(attrlist) 320 #define ecb_attribute(attrlist) __attribute__ (attrlist)
321#else
322 #define ecb_attribute(attrlist)
323#endif
324
325#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
303 #define ecb_is_constant(expr) __builtin_constant_p (expr) 326 #define ecb_is_constant(expr) __builtin_constant_p (expr)
304 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
305 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
306#else 327#else
307 #define ecb_attribute(attrlist)
308
309 /* possible C11 impl for integral types 328 /* possible C11 impl for integral types
310 typedef struct ecb_is_constant_struct ecb_is_constant_struct; 329 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
311 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ 330 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
312 331
313 #define ecb_is_constant(expr) 0 332 #define ecb_is_constant(expr) 0
333#endif
334
335#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
336 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
337#else
314 #define ecb_expect(expr,value) (expr) 338 #define ecb_expect(expr,value) (expr)
339#endif
340
341#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
342 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
343#else
315 #define ecb_prefetch(addr,rw,locality) 344 #define ecb_prefetch(addr,rw,locality)
316#endif 345#endif
317 346
318/* no emulation for ecb_decltype */ 347/* no emulation for ecb_decltype */
319#if ECB_GCC_VERSION(4,5) 348#if ECB_CPP11
349 // older implementations might have problems with decltype(x)::type, work around it
350 template<class T> struct ecb_decltype_t { typedef T type; };
320 #define ecb_decltype(x) __decltype(x) 351 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
321#elif ECB_GCC_VERSION(3,0) 352#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
322 #define ecb_decltype(x) __typeof(x) 353 #define ecb_decltype(x) __typeof__ (x)
323#endif 354#endif
324 355
325#if _MSC_VER >= 1300 356#if _MSC_VER >= 1300
326 #define ecb_deprecated __declspec(deprecated) 357 #define ecb_deprecated __declspec (deprecated)
327#else 358#else
328 #define ecb_deprecated ecb_attribute ((__deprecated__)) 359 #define ecb_deprecated ecb_attribute ((__deprecated__))
329#endif 360#endif
330 361
362#if _MSC_VER >= 1500
363 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
364#elif ECB_GCC_VERSION(4,5)
365 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
366#else
367 #define ecb_deprecated_message(msg) ecb_deprecated
368#endif
369
370#if _MSC_VER >= 1400
371 #define ecb_noinline __declspec (noinline)
372#else
331#define ecb_noinline ecb_attribute ((__noinline__)) 373 #define ecb_noinline ecb_attribute ((__noinline__))
374#endif
375
332#define ecb_unused ecb_attribute ((__unused__)) 376#define ecb_unused ecb_attribute ((__unused__))
333#define ecb_const ecb_attribute ((__const__)) 377#define ecb_const ecb_attribute ((__const__))
334#define ecb_pure ecb_attribute ((__pure__)) 378#define ecb_pure ecb_attribute ((__pure__))
335 379
336/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ 380#if ECB_C11 || __IBMC_NORETURN
337#if ECB_C11 381 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
338 #define ecb_noreturn _Noreturn 382 #define ecb_noreturn _Noreturn
383#elif ECB_CPP11
384 #define ecb_noreturn [[noreturn]]
385#elif _MSC_VER >= 1200
386 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
387 #define ecb_noreturn __declspec (noreturn)
339#else 388#else
340 #define ecb_noreturn ecb_attribute ((__noreturn__)) 389 #define ecb_noreturn ecb_attribute ((__noreturn__))
341#endif 390#endif
342 391
343#if ECB_GCC_VERSION(4,3) 392#if ECB_GCC_VERSION(4,3)
… …
358/* for compatibility to the rest of the world */ 407/* for compatibility to the rest of the world */
359#define ecb_likely(expr) ecb_expect_true (expr) 408#define ecb_likely(expr) ecb_expect_true (expr)
360#define ecb_unlikely(expr) ecb_expect_false (expr) 409#define ecb_unlikely(expr) ecb_expect_false (expr)
361 410
362/* count trailing zero bits and count # of one bits */ 411/* count trailing zero bits and count # of one bits */
363#if ECB_GCC_VERSION(3,4) 412#if ECB_GCC_VERSION(3,4) \
413 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
414 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
415 && ECB_CLANG_BUILTIN(__builtin_popcount))
364 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ 416 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
365 #define ecb_ld32(x) (__builtin_clz (x) ^ 31) 417 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
366 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) 418 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
367 #define ecb_ctz32(x) __builtin_ctz (x) 419 #define ecb_ctz32(x) __builtin_ctz (x)
368 #define ecb_ctz64(x) __builtin_ctzll (x) 420 #define ecb_ctz64(x) __builtin_ctzll (x)
369 #define ecb_popcount32(x) __builtin_popcount (x) 421 #define ecb_popcount32(x) __builtin_popcount (x)
370 /* no popcountll */ 422 /* no popcountll */
371#else 423#else
372 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 424 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
373 ecb_function_ int 425 ecb_function_ ecb_const int
374 ecb_ctz32 (uint32_t x) 426 ecb_ctz32 (uint32_t x)
375 { 427 {
376 int r = 0; 428 int r = 0;
377 429
378 x &= ~x + 1; /* this isolates the lowest bit */ 430 x &= ~x + 1; /* this isolates the lowest bit */
… …
392#endif 444#endif
393 445
394 return r; 446 return r;
395 } 447 }
396 448
397 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 449 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
398 ecb_function_ int 450 ecb_function_ ecb_const int
399 ecb_ctz64 (uint64_t x) 451 ecb_ctz64 (uint64_t x)
400 { 452 {
401 int shift = x & 0xffffffffU ? 0 : 32; 453 int shift = x & 0xffffffff ? 0 : 32;
402 return ecb_ctz32 (x >> shift) + shift; 454 return ecb_ctz32 (x >> shift) + shift;
403 } 455 }
404 456
405 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 457 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
406 ecb_function_ int 458 ecb_function_ ecb_const int
407 ecb_popcount32 (uint32_t x) 459 ecb_popcount32 (uint32_t x)
408 { 460 {
409 x -= (x >> 1) & 0x55555555; 461 x -= (x >> 1) & 0x55555555;
410 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 462 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
411 x = ((x >> 4) + x) & 0x0f0f0f0f; 463 x = ((x >> 4) + x) & 0x0f0f0f0f;
412 x *= 0x01010101; 464 x *= 0x01010101;
413 465
414 return x >> 24; 466 return x >> 24;
415 } 467 }
416 468
417 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 469 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
418 ecb_function_ int ecb_ld32 (uint32_t x) 470 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
419 { 471 {
420 int r = 0; 472 int r = 0;
421 473
422 if (x >> 16) { x >>= 16; r += 16; } 474 if (x >> 16) { x >>= 16; r += 16; }
423 if (x >> 8) { x >>= 8; r += 8; } 475 if (x >> 8) { x >>= 8; r += 8; }
… …
426 if (x >> 1) { r += 1; } 478 if (x >> 1) { r += 1; }
427 479
428 return r; 480 return r;
429 } 481 }
430 482
431 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 483 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
432 ecb_function_ int ecb_ld64 (uint64_t x) 484 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
433 { 485 {
434 int r = 0; 486 int r = 0;
435 487
436 if (x >> 32) { x >>= 32; r += 32; } 488 if (x >> 32) { x >>= 32; r += 32; }
437 489
438 return r + ecb_ld32 (x); 490 return r + ecb_ld32 (x);
439 } 491 }
440#endif 492#endif
441 493
442ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 494ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
443ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 495ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
444ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 496ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
445ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } 497ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
446 498
447ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 499ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
448ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 500ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
449{ 501{
450 return ( (x * 0x0802U & 0x22110U) 502 return ( (x * 0x0802U & 0x22110U)
451 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 503 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
452} 504}
453 505
454ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 506ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
455ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 507ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
456{ 508{
457 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 509 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
458 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 510 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
459 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 511 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
460 x = ( x >> 8 ) | ( x << 8); 512 x = ( x >> 8 ) | ( x << 8);
461 513
462 return x; 514 return x;
463} 515}
464 516
465ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 517ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
466ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 518ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
467{ 519{
468 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 520 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
469 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 521 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
470 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 522 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
471 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 523 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
474 return x; 526 return x;
475} 527}
476 528
477/* popcount64 is only available on 64 bit cpus as gcc builtin */ 529/* popcount64 is only available on 64 bit cpus as gcc builtin */
478/* so for this version we are lazy */ 530/* so for this version we are lazy */
479ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 531ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
480ecb_function_ int 532ecb_function_ ecb_const int
481ecb_popcount64 (uint64_t x) 533ecb_popcount64 (uint64_t x)
482{ 534{
483 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 535 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
484} 536}
485 537
486ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 538ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
487ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 539ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
488ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 540ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
489ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 541ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
490ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 542ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
491ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 543ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
492ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 544ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
493ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 545ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
494 546
495ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 547ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
496ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 548ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
497ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 549ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
498ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 550ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
499ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 551ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
500ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 552ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
501ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 553ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
502ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 554ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
503 555
504#if ECB_GCC_VERSION(4,3) 556#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
557 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
558 #define ecb_bswap16(x) __builtin_bswap16 (x)
559 #else
505 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 560 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
561 #endif
506 #define ecb_bswap32(x) __builtin_bswap32 (x) 562 #define ecb_bswap32(x) __builtin_bswap32 (x)
507 #define ecb_bswap64(x) __builtin_bswap64 (x) 563 #define ecb_bswap64(x) __builtin_bswap64 (x)
564#elif _MSC_VER
565 #include <stdlib.h>
566 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
567 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
568 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
508#else 569#else
509 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 570 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
510 ecb_function_ uint16_t 571 ecb_function_ ecb_const uint16_t
511 ecb_bswap16 (uint16_t x) 572 ecb_bswap16 (uint16_t x)
512 { 573 {
513 return ecb_rotl16 (x, 8); 574 return ecb_rotl16 (x, 8);
514 } 575 }
515 576
516 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 577 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
517 ecb_function_ uint32_t 578 ecb_function_ ecb_const uint32_t
518 ecb_bswap32 (uint32_t x) 579 ecb_bswap32 (uint32_t x)
519 { 580 {
520 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 581 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
521 } 582 }
522 583
523 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 584 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
524 ecb_function_ uint64_t 585 ecb_function_ ecb_const uint64_t
525 ecb_bswap64 (uint64_t x) 586 ecb_bswap64 (uint64_t x)
526 { 587 {
527 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 588 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
528 } 589 }
529#endif 590#endif
530 591
531#if ECB_GCC_VERSION(4,5) 592#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
532 #define ecb_unreachable() __builtin_unreachable () 593 #define ecb_unreachable() __builtin_unreachable ()
533#else 594#else
534 /* this seems to work fine, but gcc always emits a warning for it :/ */ 595 /* this seems to work fine, but gcc always emits a warning for it :/ */
535 ecb_inline void ecb_unreachable (void) ecb_noreturn; 596 ecb_inline ecb_noreturn void ecb_unreachable (void);
536 ecb_inline void ecb_unreachable (void) { } 597 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
537#endif 598#endif
538 599
539/* try to tell the compiler that some condition is definitely true */ 600/* try to tell the compiler that some condition is definitely true */
540#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 601#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
541 602
542ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 603ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
543ecb_inline unsigned char 604ecb_inline ecb_const unsigned char
544ecb_byteorder_helper (void) 605ecb_byteorder_helper (void)
545{ 606{
546 /* the union code still generates code under pressure in gcc, */ 607 /* the union code still generates code under pressure in gcc, */
547 /* but less than using pointers, and always seems to */ 608 /* but less than using pointers, and always seems to */
548 /* successfully return a constant. */ 609 /* successfully return a constant. */
549 /* the reason why we have this horrible preprocessor mess */ 610 /* the reason why we have this horrible preprocessor mess */
550 /* is to avoid it in all cases, at least on common architectures */ 611 /* is to avoid it in all cases, at least on common architectures */
551 /* or when using a recent enough gcc version (>= 4.6) */ 612 /* or when using a recent enough gcc version (>= 4.6) */
552#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 613#if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
553 return 0x44; 614 return 0x44;
554#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 615#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
555 return 0x44; 616 return 0x44;
556#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 617#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
557 return 0x11; 618 return 0x11;
… …
563 } u = { 0x11223344 }; 624 } u = { 0x11223344 };
564 return u.c; 625 return u.c;
565#endif 626#endif
566} 627}
567 628
568ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 629ecb_inline ecb_const ecb_bool ecb_big_endian (void);
569ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 630ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
570ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 631ecb_inline ecb_const ecb_bool ecb_little_endian (void);
571ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 632ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
572 633
573#if ECB_GCC_VERSION(3,0) || ECB_C99 634#if ECB_GCC_VERSION(3,0) || ECB_C99
574 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 635 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
575#else 636#else
576 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 637 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
577#endif 638#endif
578 639
579#if __cplusplus 640#if ECB_CPP
580 template<typename T> 641 template<typename T>
581 static inline T ecb_div_rd (T val, T div) 642 static inline T ecb_div_rd (T val, T div)
582 { 643 {
583 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 644 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
584 } 645 }
… …
601 } 662 }
602#else 663#else
603 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 664 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
604#endif 665#endif
605 666
667ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint16_t x);
668ecb_function_ ecb_const uint32_t
669ecb_binary16_to_binary32 (uint16_t x)
670{
671 unsigned int s = (x & 0x8000) << (31 - 15);
672 int e = (x >> 10) & 0x001f;
673 unsigned int m = x & 0x03ff;
674
675 if (ecb_expect_false (e == 31))
676 /* infinity or NaN */
677 e = 255 - (127 - 15);
678 else if (ecb_expect_false (!e))
679 {
680 if (ecb_expect_true (!m))
681 /* zero, handled by code below by forcing e to 0 */
682 e = 0 - (127 - 15);
683 else
684 {
685 /* subnormal, renormalise */
686 unsigned int s = 10 - ecb_ld32 (m);
687
688 m = (m << s) & 0x3ff; /* mask implicit bit */
689 e -= s - 1;
690 }
691 }
692
693 /* e and m now are normalised, or zero, (or inf or nan) */
694 e += 127 - 15;
695
696 return s | (e << 23) | (m << (23 - 10));
697}
698
699ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
700ecb_function_ ecb_const uint16_t
701ecb_binary32_to_binary16 (uint32_t x)
702{
703 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
704 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
705 unsigned int m = x & 0x007fffff;
706
707 x &= 0x7fffffff;
708
709 /* if it's within range of binary16 normals, use fast path */
710 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
711 {
712 /* mantissa round-to-even */
713 m += 0x00000fff + ((m >> (23 - 10)) & 1);
714
715 /* handle overflow */
716 if (ecb_expect_false (m >= 0x00800000))
717 {
718 m >>= 1;
719 e += 1;
720 }
721
722 return s | (e << 10) | (m >> (23 - 10));
723 }
724
725 /* handle large numbers and infinity */
726 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
727 return s | 0x7c00;
728
729 /* handle zero and subnormals */
730 if (ecb_expect_true (x < 0x38800000))
731 {
732 /* zero */
733 if (ecb_expect_true (!x))
734 return s;
735
736 /* handle subnormals */
737
738 m |= 0x00800000; /* make implicit bit explicit */
739
740 /* very tricky - we need to round to the nearest e (+10) bit value */
741 {
742 unsigned int bits = 14 - e;
743 unsigned int half = (1 << (bits - 1)) - 1;
744 unsigned int even = (m >> bits) & 1;
745
746 /* if this overflows, we will end up with a normalised number */
747 m = (m + half + even) >> bits;
748 }
749
750 return s | m;
751 }
752
753 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
754 m >>= 13;
755
756 return s | 0x7c00 | m | !m;
757}
758
606/*******************************************************************************/ 759/*******************************************************************************/
607/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ 760/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
608 761
609/* basically, everything uses "ieee pure-endian" floating point numbers */ 762/* basically, everything uses "ieee pure-endian" floating point numbers */
610/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 763/* the only noteworthy exception is ancient armle, which uses order 43218765 */
611#if 0 \ 764#if 0 \
612 || __i386 || __i386__ \ 765 || __i386 || __i386__ \
613 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 766 || ECB_GCC_AMD64 \
614 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 767 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
615 || defined __s390__ || defined __s390x__ \ 768 || defined __s390__ || defined __s390x__ \
616 || defined __mips__ \ 769 || defined __mips__ \
617 || defined __alpha__ \ 770 || defined __alpha__ \
618 || defined __hppa__ \ 771 || defined __hppa__ \
619 || defined __ia64__ \ 772 || defined __ia64__ \
620 || defined __m68k__ \ 773 || defined __m68k__ \
621 || defined __m88k__ \ 774 || defined __m88k__ \
622 || defined __sh__ \ 775 || defined __sh__ \
623 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ 776 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
624 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ 777 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
625 || defined __aarch64__ 778 || defined __aarch64__
626 #define ECB_STDFP 1 779 #define ECB_STDFP 1
627 #include <string.h> /* for memcpy */ 780 #include <string.h> /* for memcpy */
628#else 781#else
… …
644 #define ECB_NAN NAN 797 #define ECB_NAN NAN
645 #else 798 #else
646 #define ECB_NAN ECB_INFINITY 799 #define ECB_NAN ECB_INFINITY
647 #endif 800 #endif
648 801
649 /* converts an ieee half/binary16 to a float */ 802 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
650 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 803 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
651 ecb_function_ float 804 #define ecb_frexpf(x,e) frexpf ((x), (e))
652 ecb_binary16_to_float (uint16_t x) 805 #else
653 { 806 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
654 int e = (x >> 10) & 0x1f; 807 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
655 int m = x & 0x3ff; 808 #endif
656 float r;
657
658 if (!e ) r = ldexpf (m , -24);
659 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
660 else if (m ) r = ECB_NAN;
661 else r = ECB_INFINITY;
662
663 return x & 0x8000 ? -r : r;
664 }
665 809
666 /* convert a float to ieee single/binary32 */ 810 /* convert a float to ieee single/binary32 */
667 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 811 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
668 ecb_function_ uint32_t 812 ecb_function_ ecb_const uint32_t
669 ecb_float_to_binary32 (float x) 813 ecb_float_to_binary32 (float x)
670 { 814 {
671 uint32_t r; 815 uint32_t r;
672 816
673 #if ECB_STDFP 817 #if ECB_STDFP
… …
680 if (x == 0e0f ) return 0x00000000U; 824 if (x == 0e0f ) return 0x00000000U;
681 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 825 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
682 if (x < -3.40282346638528860e+38f) return 0xff800000U; 826 if (x < -3.40282346638528860e+38f) return 0xff800000U;
683 if (x != x ) return 0x7fbfffffU; 827 if (x != x ) return 0x7fbfffffU;
684 828
685 m = frexpf (x, &e) * 0x1000000U; 829 m = ecb_frexpf (x, &e) * 0x1000000U;
686 830
687 r = m & 0x80000000U; 831 r = m & 0x80000000U;
688 832
689 if (r) 833 if (r)
690 m = -m; 834 m = -m;
… …
702 846
703 return r; 847 return r;
704 } 848 }
705 849
706 /* converts an ieee single/binary32 to a float */ 850 /* converts an ieee single/binary32 to a float */
707 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 851 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
708 ecb_function_ float 852 ecb_function_ ecb_const float
709 ecb_binary32_to_float (uint32_t x) 853 ecb_binary32_to_float (uint32_t x)
710 { 854 {
711 float r; 855 float r;
712 856
713 #if ECB_STDFP 857 #if ECB_STDFP
… …
723 x |= 0x800000U; 867 x |= 0x800000U;
724 else 868 else
725 e = 1; 869 e = 1;
726 870
727 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 871 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
728 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 872 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
729 873
730 r = neg ? -r : r; 874 r = neg ? -r : r;
731 #endif 875 #endif
732 876
733 return r; 877 return r;
734 } 878 }
735 879
736 /* convert a double to ieee double/binary64 */ 880 /* convert a double to ieee double/binary64 */
737 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 881 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
738 ecb_function_ uint64_t 882 ecb_function_ ecb_const uint64_t
739 ecb_double_to_binary64 (double x) 883 ecb_double_to_binary64 (double x)
740 { 884 {
741 uint64_t r; 885 uint64_t r;
742 886
743 #if ECB_STDFP 887 #if ECB_STDFP
… …
772 916
773 return r; 917 return r;
774 } 918 }
775 919
776 /* converts an ieee double/binary64 to a double */ 920 /* converts an ieee double/binary64 to a double */
777 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 921 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
778 ecb_function_ double 922 ecb_function_ ecb_const double
779 ecb_binary64_to_double (uint64_t x) 923 ecb_binary64_to_double (uint64_t x)
780 { 924 {
781 double r; 925 double r;
782 926
783 #if ECB_STDFP 927 #if ECB_STDFP
… …
801 #endif 945 #endif
802 946
803 return r; 947 return r;
804 } 948 }
805 949
806#endif 950 /* convert a float to ieee half/binary16 */
951 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
952 ecb_function_ ecb_const uint16_t
953 ecb_float_to_binary16 (float x)
954 {
955 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
956 }
807 957
808#endif 958 /* convert an ieee half/binary16 to float */
959 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
960 ecb_function_ ecb_const float
961 ecb_binary16_to_float (uint16_t x)
962 {
963 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
964 }
809 965
966#endif
967
968#endif
969

Diff Legend

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