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Comparing libecb/ecb.h (file contents):
Revision 1.142 by root, Thu Oct 16 14:45:44 2014 UTC vs.
Revision 1.177 by root, Mon Nov 19 00:27:38 2018 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 0x00010004 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;
… …
67 typedef uint32_t uintptr_t; 67 typedef uint32_t uintptr_t;
68 typedef int32_t intptr_t; 68 typedef int32_t intptr_t;
69 #endif 69 #endif
70#else 70#else
71 #include <inttypes.h> 71 #include <inttypes.h>
72 #if UINTMAX_MAX > 0xffffffffU 72 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
73 #define ECB_PTRSIZE 8 73 #define ECB_PTRSIZE 8
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
… …
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
101#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) 104#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
102 105
103#if __clang__ && defined(__has_builtin) 106#if __clang__ && defined __has_builtin
104 #define ECB_CLANG_BUILTIN(x) __has_builtin(x) 107 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
105#else 108#else
106 #define ECB_CLANG_BUILTIN(x) 0 109 #define ECB_CLANG_BUILTIN(x) 0
107#endif 110#endif
108 111
109#if __clang__ && defined(__has_extension) 112#if __clang__ && defined __has_extension
110 #define ECB_CLANG_EXTENSION(x) __has_extension(x) 113 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
111#else 114#else
112 #define ECB_CLANG_EXTENSION(x) 0 115 #define ECB_CLANG_EXTENSION(x) 0
113#endif 116#endif
114 117
115#define ECB_CPP (__cplusplus+0) 118#define ECB_CPP (__cplusplus+0)
116#define ECB_CPP11 (__cplusplus >= 201103L) 119#define ECB_CPP11 (__cplusplus >= 201103L)
120#define ECB_CPP14 (__cplusplus >= 201402L)
121#define ECB_CPP17 (__cplusplus >= 201703L)
117 122
118#if ECB_CPP 123#if ECB_CPP
119 #define ECB_C 0 124 #define ECB_C 0
120 #define ECB_STDC_VERSION 0 125 #define ECB_STDC_VERSION 0
121#else 126#else
… …
123 #define ECB_STDC_VERSION __STDC_VERSION__ 128 #define ECB_STDC_VERSION __STDC_VERSION__
124#endif 129#endif
125 130
126#define ECB_C99 (ECB_STDC_VERSION >= 199901L) 131#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
127#define ECB_C11 (ECB_STDC_VERSION >= 201112L) 132#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
133#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
128 134
129#if ECB_CPP 135#if ECB_CPP
130 #define ECB_EXTERN_C extern "C" 136 #define ECB_EXTERN_C extern "C"
131 #define ECB_EXTERN_C_BEG ECB_EXTERN_C { 137 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
132 #define ECB_EXTERN_C_END } 138 #define ECB_EXTERN_C_END }
… …
145 #define ECB_NO_SMP 1 151 #define ECB_NO_SMP 1
146#endif 152#endif
147 153
148#if ECB_NO_SMP 154#if ECB_NO_SMP
149 #define ECB_MEMORY_FENCE do { } while (0) 155 #define ECB_MEMORY_FENCE do { } while (0)
156#endif
157
158/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
159#if __xlC__ && ECB_CPP
160 #include <builtins.h>
161#endif
162
163#if 1400 <= _MSC_VER
164 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
150#endif 165#endif
151 166
152#ifndef ECB_MEMORY_FENCE 167#ifndef ECB_MEMORY_FENCE
153 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 168 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
154 #if __i386 || __i386__ 169 #if __i386 || __i386__
155 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 170 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
156 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 171 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
157 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 172 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
158 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 173 #elif ECB_GCC_AMD64
159 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 174 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
160 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 175 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
161 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
162 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 177 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 178 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
179 #elif defined __ARM_ARCH_2__ \
180 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
181 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
182 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
183 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
184 || defined __ARM_ARCH_5TEJ__
185 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
164 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 186 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
165 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 187 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
188 || defined __ARM_ARCH_6T2__
166 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 189 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
167 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 190 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
168 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 191 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
169 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 192 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
170 #elif __aarch64__ 193 #elif __aarch64__
171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") 194 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
172 #elif (__sparc || __sparc__) && !__sparcv8 195 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
173 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 196 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
174 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 197 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
175 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 198 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
176 #elif defined __s390__ || defined __s390x__ 199 #elif defined __s390__ || defined __s390x__
177 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 200 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
… …
278 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 301 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
279#endif 302#endif
280 303
281/*****************************************************************************/ 304/*****************************************************************************/
282 305
283#if __cplusplus 306#if ECB_CPP
284 #define ecb_inline static inline 307 #define ecb_inline static inline
285#elif ECB_GCC_VERSION(2,5) 308#elif ECB_GCC_VERSION(2,5)
286 #define ecb_inline static __inline__ 309 #define ecb_inline static __inline__
287#elif ECB_C99 310#elif ECB_C99
288 #define ecb_inline static inline 311 #define ecb_inline static inline
… …
302 325
303#define ECB_CONCAT_(a, b) a ## b 326#define ECB_CONCAT_(a, b) a ## b
304#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 327#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
305#define ECB_STRINGIFY_(a) # a 328#define ECB_STRINGIFY_(a) # a
306#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 329#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
330#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
307 331
308#define ecb_function_ ecb_inline 332#define ecb_function_ ecb_inline
309 333
310#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) 334#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
311 #define ecb_attribute(attrlist) __attribute__ (attrlist) 335 #define ecb_attribute(attrlist) __attribute__ (attrlist)
… …
334#else 358#else
335 #define ecb_prefetch(addr,rw,locality) 359 #define ecb_prefetch(addr,rw,locality)
336#endif 360#endif
337 361
338/* no emulation for ecb_decltype */ 362/* no emulation for ecb_decltype */
339#if ECB_GCC_VERSION(4,5) 363#if ECB_CPP11
364 // older implementations might have problems with decltype(x)::type, work around it
365 template<class T> struct ecb_decltype_t { typedef T type; };
340 #define ecb_decltype(x) __decltype (x) 366 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
341#elif ECB_GCC_VERSION(3,0) 367#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
342 #define ecb_decltype(x) __typeof (x) 368 #define ecb_decltype(x) __typeof__ (x)
343#elif ECB_CPP11
344 #define ecb_decltype(x) decltype (x)
345#endif 369#endif
346 370
347#if _MSC_VER >= 1300 371#if _MSC_VER >= 1300
348 #define ecb_deprecated __declspec(deprecated) 372 #define ecb_deprecated __declspec (deprecated)
349#else 373#else
350 #define ecb_deprecated ecb_attribute ((__deprecated__)) 374 #define ecb_deprecated ecb_attribute ((__deprecated__))
351#endif 375#endif
352 376
377#if _MSC_VER >= 1500
378 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
379#elif ECB_GCC_VERSION(4,5)
380 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
381#else
382 #define ecb_deprecated_message(msg) ecb_deprecated
383#endif
384
385#if _MSC_VER >= 1400
386 #define ecb_noinline __declspec (noinline)
387#else
353#define ecb_noinline ecb_attribute ((__noinline__)) 388 #define ecb_noinline ecb_attribute ((__noinline__))
389#endif
390
354#define ecb_unused ecb_attribute ((__unused__)) 391#define ecb_unused ecb_attribute ((__unused__))
355#define ecb_const ecb_attribute ((__const__)) 392#define ecb_const ecb_attribute ((__const__))
356#define ecb_pure ecb_attribute ((__pure__)) 393#define ecb_pure ecb_attribute ((__pure__))
357 394
358/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ 395#if ECB_C11 || __IBMC_NORETURN
359#if ECB_C11 396 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
360 #define ecb_noreturn _Noreturn 397 #define ecb_noreturn _Noreturn
398#elif ECB_CPP11
399 #define ecb_noreturn [[noreturn]]
400#elif _MSC_VER >= 1200
401 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
402 #define ecb_noreturn __declspec (noreturn)
361#else 403#else
362 #define ecb_noreturn ecb_attribute ((__noreturn__)) 404 #define ecb_noreturn ecb_attribute ((__noreturn__))
363#endif 405#endif
364 406
365#if ECB_GCC_VERSION(4,3) 407#if ECB_GCC_VERSION(4,3)
… …
392 #define ecb_ctz32(x) __builtin_ctz (x) 434 #define ecb_ctz32(x) __builtin_ctz (x)
393 #define ecb_ctz64(x) __builtin_ctzll (x) 435 #define ecb_ctz64(x) __builtin_ctzll (x)
394 #define ecb_popcount32(x) __builtin_popcount (x) 436 #define ecb_popcount32(x) __builtin_popcount (x)
395 /* no popcountll */ 437 /* no popcountll */
396#else 438#else
397 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 439 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
398 ecb_function_ int 440 ecb_function_ ecb_const int
399 ecb_ctz32 (uint32_t x) 441 ecb_ctz32 (uint32_t x)
400 { 442 {
443#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
444 unsigned long r;
445 _BitScanForward (&r, x);
446 return (int)r;
447#else
401 int r = 0; 448 int r = 0;
402 449
403 x &= ~x + 1; /* this isolates the lowest bit */ 450 x &= ~x + 1; /* this isolates the lowest bit */
404 451
405#if ECB_branchless_on_i386 452#if ECB_branchless_on_i386
… …
415 if (x & 0xff00ff00) r += 8; 462 if (x & 0xff00ff00) r += 8;
416 if (x & 0xffff0000) r += 16; 463 if (x & 0xffff0000) r += 16;
417#endif 464#endif
418 465
419 return r; 466 return r;
467#endif
420 } 468 }
421 469
422 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 470 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
423 ecb_function_ int 471 ecb_function_ ecb_const int
424 ecb_ctz64 (uint64_t x) 472 ecb_ctz64 (uint64_t x)
425 { 473 {
474#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
475 unsigned long r;
476 _BitScanForward64 (&r, x);
477 return (int)r;
478#else
426 int shift = x & 0xffffffffU ? 0 : 32; 479 int shift = x & 0xffffffff ? 0 : 32;
427 return ecb_ctz32 (x >> shift) + shift; 480 return ecb_ctz32 (x >> shift) + shift;
481#endif
428 } 482 }
429 483
430 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 484 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
431 ecb_function_ int 485 ecb_function_ ecb_const int
432 ecb_popcount32 (uint32_t x) 486 ecb_popcount32 (uint32_t x)
433 { 487 {
434 x -= (x >> 1) & 0x55555555; 488 x -= (x >> 1) & 0x55555555;
435 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 489 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
436 x = ((x >> 4) + x) & 0x0f0f0f0f; 490 x = ((x >> 4) + x) & 0x0f0f0f0f;
437 x *= 0x01010101; 491 x *= 0x01010101;
438 492
439 return x >> 24; 493 return x >> 24;
440 } 494 }
441 495
442 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 496 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
443 ecb_function_ int ecb_ld32 (uint32_t x) 497 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
444 { 498 {
499#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
500 unsigned long r;
501 _BitScanReverse (&r, x);
502 return (int)r;
503#else
445 int r = 0; 504 int r = 0;
446 505
447 if (x >> 16) { x >>= 16; r += 16; } 506 if (x >> 16) { x >>= 16; r += 16; }
448 if (x >> 8) { x >>= 8; r += 8; } 507 if (x >> 8) { x >>= 8; r += 8; }
449 if (x >> 4) { x >>= 4; r += 4; } 508 if (x >> 4) { x >>= 4; r += 4; }
450 if (x >> 2) { x >>= 2; r += 2; } 509 if (x >> 2) { x >>= 2; r += 2; }
451 if (x >> 1) { r += 1; } 510 if (x >> 1) { r += 1; }
452 511
453 return r; 512 return r;
513#endif
454 } 514 }
455 515
456 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 516 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
457 ecb_function_ int ecb_ld64 (uint64_t x) 517 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
458 { 518 {
519#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
520 unsigned long r;
521 _BitScanReverse64 (&r, x);
522 return (int)r;
523#else
459 int r = 0; 524 int r = 0;
460 525
461 if (x >> 32) { x >>= 32; r += 32; } 526 if (x >> 32) { x >>= 32; r += 32; }
462 527
463 return r + ecb_ld32 (x); 528 return r + ecb_ld32 (x);
464 }
465#endif 529#endif
530 }
531#endif
466 532
467ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 533ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
468ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 534ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
469ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 535ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
470ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } 536ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
471 537
472ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 538ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
473ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 539ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
474{ 540{
475 return ( (x * 0x0802U & 0x22110U) 541 return ( (x * 0x0802U & 0x22110U)
476 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 542 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
477} 543}
478 544
479ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 545ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
480ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 546ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
481{ 547{
482 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 548 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
483 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 549 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
484 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 550 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
485 x = ( x >> 8 ) | ( x << 8); 551 x = ( x >> 8 ) | ( x << 8);
486 552
487 return x; 553 return x;
488} 554}
489 555
490ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 556ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
491ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 557ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
492{ 558{
493 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 559 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
494 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 560 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
495 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 561 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
496 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 562 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
499 return x; 565 return x;
500} 566}
501 567
502/* popcount64 is only available on 64 bit cpus as gcc builtin */ 568/* popcount64 is only available on 64 bit cpus as gcc builtin */
503/* so for this version we are lazy */ 569/* so for this version we are lazy */
504ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 570ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
505ecb_function_ int 571ecb_function_ ecb_const int
506ecb_popcount64 (uint64_t x) 572ecb_popcount64 (uint64_t x)
507{ 573{
508 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 574 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
509} 575}
510 576
511ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 577ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
512ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 578ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
513ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 579ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
514ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 580ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
515ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 581ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
516ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 582ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
517ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 583ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
518ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 584ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
519 585
520ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 586ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
521ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 587ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
522ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 588ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
523ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 589ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
524ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 590ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
525ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 591ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
526ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 592ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
527ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 593ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
528 594
529#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) 595#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
596 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
597 #define ecb_bswap16(x) __builtin_bswap16 (x)
598 #else
530 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 599 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
600 #endif
531 #define ecb_bswap32(x) __builtin_bswap32 (x) 601 #define ecb_bswap32(x) __builtin_bswap32 (x)
532 #define ecb_bswap64(x) __builtin_bswap64 (x) 602 #define ecb_bswap64(x) __builtin_bswap64 (x)
603#elif _MSC_VER
604 #include <stdlib.h>
605 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
606 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
607 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
533#else 608#else
534 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 609 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
535 ecb_function_ uint16_t 610 ecb_function_ ecb_const uint16_t
536 ecb_bswap16 (uint16_t x) 611 ecb_bswap16 (uint16_t x)
537 { 612 {
538 return ecb_rotl16 (x, 8); 613 return ecb_rotl16 (x, 8);
539 } 614 }
540 615
541 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 616 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
542 ecb_function_ uint32_t 617 ecb_function_ ecb_const uint32_t
543 ecb_bswap32 (uint32_t x) 618 ecb_bswap32 (uint32_t x)
544 { 619 {
545 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 620 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
546 } 621 }
547 622
548 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 623 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
549 ecb_function_ uint64_t 624 ecb_function_ ecb_const uint64_t
550 ecb_bswap64 (uint64_t x) 625 ecb_bswap64 (uint64_t x)
551 { 626 {
552 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 627 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
553 } 628 }
554#endif 629#endif
555 630
556#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) 631#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
557 #define ecb_unreachable() __builtin_unreachable () 632 #define ecb_unreachable() __builtin_unreachable ()
558#else 633#else
559 /* this seems to work fine, but gcc always emits a warning for it :/ */ 634 /* this seems to work fine, but gcc always emits a warning for it :/ */
560 ecb_inline void ecb_unreachable (void) ecb_noreturn; 635 ecb_inline ecb_noreturn void ecb_unreachable (void);
561 ecb_inline void ecb_unreachable (void) { } 636 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
562#endif 637#endif
563 638
564/* try to tell the compiler that some condition is definitely true */ 639/* try to tell the compiler that some condition is definitely true */
565#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 640#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
566 641
567ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 642ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
568ecb_inline unsigned char 643ecb_inline ecb_const uint32_t
569ecb_byteorder_helper (void) 644ecb_byteorder_helper (void)
570{ 645{
571 /* the union code still generates code under pressure in gcc, */ 646 /* the union code still generates code under pressure in gcc, */
572 /* but less than using pointers, and always seems to */ 647 /* but less than using pointers, and always seems to */
573 /* successfully return a constant. */ 648 /* successfully return a constant. */
574 /* the reason why we have this horrible preprocessor mess */ 649 /* the reason why we have this horrible preprocessor mess */
575 /* is to avoid it in all cases, at least on common architectures */ 650 /* is to avoid it in all cases, at least on common architectures */
576 /* or when using a recent enough gcc version (>= 4.6) */ 651 /* or when using a recent enough gcc version (>= 4.6) */
577#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
578 return 0x44;
579#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 652#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
653 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
654 #define ECB_LITTLE_ENDIAN 1
580 return 0x44; 655 return 0x44332211;
581#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 656#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
657 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
658 #define ECB_BIG_ENDIAN 1
582 return 0x11; 659 return 0x11223344;
583#else 660#else
584 union 661 union
585 { 662 {
663 uint8_t c[4];
586 uint32_t i; 664 uint32_t u;
587 uint8_t c;
588 } u = { 0x11223344 }; 665 } u = { 0x11, 0x22, 0x33, 0x44 };
589 return u.c; 666 return u.u;
590#endif 667#endif
591} 668}
592 669
593ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 670ecb_inline ecb_const ecb_bool ecb_big_endian (void);
594ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 671ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
595ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 672ecb_inline ecb_const ecb_bool ecb_little_endian (void);
596ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 673ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
597 674
598#if ECB_GCC_VERSION(3,0) || ECB_C99 675#if ECB_GCC_VERSION(3,0) || ECB_C99
599 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 676 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
600#else 677#else
601 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 678 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
602#endif 679#endif
603 680
604#if __cplusplus 681#if ECB_CPP
605 template<typename T> 682 template<typename T>
606 static inline T ecb_div_rd (T val, T div) 683 static inline T ecb_div_rd (T val, T div)
607 { 684 {
608 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 685 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
609 } 686 }
… …
626 } 703 }
627#else 704#else
628 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 705 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
629#endif 706#endif
630 707
708ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
709ecb_function_ ecb_const uint32_t
710ecb_binary16_to_binary32 (uint32_t x)
711{
712 unsigned int s = (x & 0x8000) << (31 - 15);
713 int e = (x >> 10) & 0x001f;
714 unsigned int m = x & 0x03ff;
715
716 if (ecb_expect_false (e == 31))
717 /* infinity or NaN */
718 e = 255 - (127 - 15);
719 else if (ecb_expect_false (!e))
720 {
721 if (ecb_expect_true (!m))
722 /* zero, handled by code below by forcing e to 0 */
723 e = 0 - (127 - 15);
724 else
725 {
726 /* subnormal, renormalise */
727 unsigned int s = 10 - ecb_ld32 (m);
728
729 m = (m << s) & 0x3ff; /* mask implicit bit */
730 e -= s - 1;
731 }
732 }
733
734 /* e and m now are normalised, or zero, (or inf or nan) */
735 e += 127 - 15;
736
737 return s | (e << 23) | (m << (23 - 10));
738}
739
740ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
741ecb_function_ ecb_const uint16_t
742ecb_binary32_to_binary16 (uint32_t x)
743{
744 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
745 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
746 unsigned int m = x & 0x007fffff;
747
748 x &= 0x7fffffff;
749
750 /* if it's within range of binary16 normals, use fast path */
751 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
752 {
753 /* mantissa round-to-even */
754 m += 0x00000fff + ((m >> (23 - 10)) & 1);
755
756 /* handle overflow */
757 if (ecb_expect_false (m >= 0x00800000))
758 {
759 m >>= 1;
760 e += 1;
761 }
762
763 return s | (e << 10) | (m >> (23 - 10));
764 }
765
766 /* handle large numbers and infinity */
767 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
768 return s | 0x7c00;
769
770 /* handle zero, subnormals and small numbers */
771 if (ecb_expect_true (x < 0x38800000))
772 {
773 /* zero */
774 if (ecb_expect_true (!x))
775 return s;
776
777 /* handle subnormals */
778
779 /* too small, will be zero */
780 if (e < (14 - 24)) /* might not be sharp, but is good enough */
781 return s;
782
783 m |= 0x00800000; /* make implicit bit explicit */
784
785 /* very tricky - we need to round to the nearest e (+10) bit value */
786 {
787 unsigned int bits = 14 - e;
788 unsigned int half = (1 << (bits - 1)) - 1;
789 unsigned int even = (m >> bits) & 1;
790
791 /* if this overflows, we will end up with a normalised number */
792 m = (m + half + even) >> bits;
793 }
794
795 return s | m;
796 }
797
798 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
799 m >>= 13;
800
801 return s | 0x7c00 | m | !m;
802}
803
631/*******************************************************************************/ 804/*******************************************************************************/
632/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ 805/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
633 806
634/* basically, everything uses "ieee pure-endian" floating point numbers */ 807/* basically, everything uses "ieee pure-endian" floating point numbers */
635/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 808/* the only noteworthy exception is ancient armle, which uses order 43218765 */
636#if 0 \ 809#if 0 \
637 || __i386 || __i386__ \ 810 || __i386 || __i386__ \
638 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 811 || ECB_GCC_AMD64 \
639 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 812 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
640 || defined __s390__ || defined __s390x__ \ 813 || defined __s390__ || defined __s390x__ \
641 || defined __mips__ \ 814 || defined __mips__ \
642 || defined __alpha__ \ 815 || defined __alpha__ \
643 || defined __hppa__ \ 816 || defined __hppa__ \
644 || defined __ia64__ \ 817 || defined __ia64__ \
645 || defined __m68k__ \ 818 || defined __m68k__ \
646 || defined __m88k__ \ 819 || defined __m88k__ \
647 || defined __sh__ \ 820 || defined __sh__ \
648 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ 821 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
649 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ 822 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
650 || defined __aarch64__ 823 || defined __aarch64__
651 #define ECB_STDFP 1 824 #define ECB_STDFP 1
652 #include <string.h> /* for memcpy */ 825 #include <string.h> /* for memcpy */
653#else 826#else
… …
669 #define ECB_NAN NAN 842 #define ECB_NAN NAN
670 #else 843 #else
671 #define ECB_NAN ECB_INFINITY 844 #define ECB_NAN ECB_INFINITY
672 #endif 845 #endif
673 846
674 /* converts an ieee half/binary16 to a float */ 847 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
675 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 848 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
676 ecb_function_ float 849 #define ecb_frexpf(x,e) frexpf ((x), (e))
677 ecb_binary16_to_float (uint16_t x) 850 #else
678 { 851 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
679 int e = (x >> 10) & 0x1f; 852 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
680 int m = x & 0x3ff; 853 #endif
681 float r;
682
683 if (!e ) r = ldexpf (m , -24);
684 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
685 else if (m ) r = ECB_NAN;
686 else r = ECB_INFINITY;
687
688 return x & 0x8000 ? -r : r;
689 }
690 854
691 /* convert a float to ieee single/binary32 */ 855 /* convert a float to ieee single/binary32 */
692 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 856 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
693 ecb_function_ uint32_t 857 ecb_function_ ecb_const uint32_t
694 ecb_float_to_binary32 (float x) 858 ecb_float_to_binary32 (float x)
695 { 859 {
696 uint32_t r; 860 uint32_t r;
697 861
698 #if ECB_STDFP 862 #if ECB_STDFP
… …
705 if (x == 0e0f ) return 0x00000000U; 869 if (x == 0e0f ) return 0x00000000U;
706 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 870 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
707 if (x < -3.40282346638528860e+38f) return 0xff800000U; 871 if (x < -3.40282346638528860e+38f) return 0xff800000U;
708 if (x != x ) return 0x7fbfffffU; 872 if (x != x ) return 0x7fbfffffU;
709 873
710 m = frexpf (x, &e) * 0x1000000U; 874 m = ecb_frexpf (x, &e) * 0x1000000U;
711 875
712 r = m & 0x80000000U; 876 r = m & 0x80000000U;
713 877
714 if (r) 878 if (r)
715 m = -m; 879 m = -m;
… …
727 891
728 return r; 892 return r;
729 } 893 }
730 894
731 /* converts an ieee single/binary32 to a float */ 895 /* converts an ieee single/binary32 to a float */
732 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 896 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
733 ecb_function_ float 897 ecb_function_ ecb_const float
734 ecb_binary32_to_float (uint32_t x) 898 ecb_binary32_to_float (uint32_t x)
735 { 899 {
736 float r; 900 float r;
737 901
738 #if ECB_STDFP 902 #if ECB_STDFP
… …
748 x |= 0x800000U; 912 x |= 0x800000U;
749 else 913 else
750 e = 1; 914 e = 1;
751 915
752 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 916 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
753 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 917 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
754 918
755 r = neg ? -r : r; 919 r = neg ? -r : r;
756 #endif 920 #endif
757 921
758 return r; 922 return r;
759 } 923 }
760 924
761 /* convert a double to ieee double/binary64 */ 925 /* convert a double to ieee double/binary64 */
762 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 926 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
763 ecb_function_ uint64_t 927 ecb_function_ ecb_const uint64_t
764 ecb_double_to_binary64 (double x) 928 ecb_double_to_binary64 (double x)
765 { 929 {
766 uint64_t r; 930 uint64_t r;
767 931
768 #if ECB_STDFP 932 #if ECB_STDFP
… …
797 961
798 return r; 962 return r;
799 } 963 }
800 964
801 /* converts an ieee double/binary64 to a double */ 965 /* converts an ieee double/binary64 to a double */
802 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 966 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
803 ecb_function_ double 967 ecb_function_ ecb_const double
804 ecb_binary64_to_double (uint64_t x) 968 ecb_binary64_to_double (uint64_t x)
805 { 969 {
806 double r; 970 double r;
807 971
808 #if ECB_STDFP 972 #if ECB_STDFP
… …
826 #endif 990 #endif
827 991
828 return r; 992 return r;
829 } 993 }
830 994
831#endif 995 /* convert a float to ieee half/binary16 */
996 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
997 ecb_function_ ecb_const uint16_t
998 ecb_float_to_binary16 (float x)
999 {
1000 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1001 }
832 1002
833#endif 1003 /* convert an ieee half/binary16 to float */
1004 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1005 ecb_function_ ecb_const float
1006 ecb_binary16_to_float (uint16_t x)
1007 {
1008 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1009 }
834 1010
1011#endif
1012
1013#endif
1014

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