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 (©) 2009-2015 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: |
… | |
… | |
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__ |
… | |
… | |
173 | |
198 | |
174 | #ifndef ECB_MEMORY_FENCE |
199 | #ifndef ECB_MEMORY_FENCE |
175 | #if ECB_GCC_VERSION(4,7) |
200 | #if ECB_GCC_VERSION(4,7) |
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) |
|
|
203 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
|
|
204 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
178 | |
205 | |
179 | /* The __has_feature syntax from clang is so misdesigned that we cannot use it |
206 | #elif ECB_CLANG_EXTENSION(c_atomic) |
180 | * without risking compile time errors with other compilers. We *could* |
|
|
181 | * define our own ecb_clang_has_feature, but I just can't be bothered to work |
|
|
182 | * around this shit time and again. |
|
|
183 | * #elif defined __clang && __has_feature (cxx_atomic) |
|
|
184 | * // see comment below (stdatomic.h) about the C11 memory model. |
207 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
185 | * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
208 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
186 | */ |
209 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
|
|
210 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
187 | |
211 | |
188 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
212 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
189 | #define ECB_MEMORY_FENCE __sync_synchronize () |
213 | #define ECB_MEMORY_FENCE __sync_synchronize () |
190 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
214 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
191 | /* 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... */ |
… | |
… | |
220 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
244 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
221 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
245 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
222 | /* for most usages, or gcc and clang have a bug */ |
246 | /* for most usages, or gcc and clang have a bug */ |
223 | /* I *currently* lean towards the latter, and inefficiently implement */ |
247 | /* I *currently* lean towards the latter, and inefficiently implement */ |
224 | /* all three of ecb's fences as a seq_cst fence */ |
248 | /* all three of ecb's fences as a seq_cst fence */ |
|
|
249 | /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ |
|
|
250 | /* for all __atomic_thread_fence's except seq_cst */ |
225 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
251 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
226 | #endif |
252 | #endif |
227 | #endif |
253 | #endif |
228 | |
254 | |
229 | #ifndef ECB_MEMORY_FENCE |
255 | #ifndef ECB_MEMORY_FENCE |
… | |
… | |
252 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
278 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
253 | #endif |
279 | #endif |
254 | |
280 | |
255 | /*****************************************************************************/ |
281 | /*****************************************************************************/ |
256 | |
282 | |
257 | #if __cplusplus |
283 | #if ECB_CPP |
258 | #define ecb_inline static inline |
284 | #define ecb_inline static inline |
259 | #elif ECB_GCC_VERSION(2,5) |
285 | #elif ECB_GCC_VERSION(2,5) |
260 | #define ecb_inline static __inline__ |
286 | #define ecb_inline static __inline__ |
261 | #elif ECB_C99 |
287 | #elif ECB_C99 |
262 | #define ecb_inline static inline |
288 | #define ecb_inline static inline |
… | |
… | |
276 | |
302 | |
277 | #define ECB_CONCAT_(a, b) a ## b |
303 | #define ECB_CONCAT_(a, b) a ## b |
278 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
304 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
279 | #define ECB_STRINGIFY_(a) # a |
305 | #define ECB_STRINGIFY_(a) # a |
280 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
306 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
|
|
307 | #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) |
281 | |
308 | |
282 | #define ecb_function_ ecb_inline |
309 | #define ecb_function_ ecb_inline |
283 | |
310 | |
284 | #if ECB_GCC_VERSION(3,1) |
311 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
285 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
312 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
|
|
313 | #else |
|
|
314 | #define ecb_attribute(attrlist) |
|
|
315 | #endif |
|
|
316 | |
|
|
317 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) |
286 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
318 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
287 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
|
|
288 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
|
|
289 | #else |
319 | #else |
290 | #define ecb_attribute(attrlist) |
|
|
291 | |
|
|
292 | /* possible C11 impl for integral types |
320 | /* possible C11 impl for integral types |
293 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
321 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
294 | #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ |
322 | #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ |
295 | |
323 | |
296 | #define ecb_is_constant(expr) 0 |
324 | #define ecb_is_constant(expr) 0 |
|
|
325 | #endif |
|
|
326 | |
|
|
327 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) |
|
|
328 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
|
|
329 | #else |
297 | #define ecb_expect(expr,value) (expr) |
330 | #define ecb_expect(expr,value) (expr) |
|
|
331 | #endif |
|
|
332 | |
|
|
333 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) |
|
|
334 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
|
|
335 | #else |
298 | #define ecb_prefetch(addr,rw,locality) |
336 | #define ecb_prefetch(addr,rw,locality) |
299 | #endif |
337 | #endif |
300 | |
338 | |
301 | /* no emulation for ecb_decltype */ |
339 | /* no emulation for ecb_decltype */ |
302 | #if ECB_GCC_VERSION(4,5) |
340 | #if ECB_CPP11 |
|
|
341 | // older implementations might have problems with decltype(x)::type, work around it |
|
|
342 | template<class T> struct ecb_decltype_t { typedef T type; }; |
303 | #define ecb_decltype(x) __decltype(x) |
343 | #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type |
304 | #elif ECB_GCC_VERSION(3,0) |
344 | #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) |
305 | #define ecb_decltype(x) __typeof(x) |
345 | #define ecb_decltype(x) __typeof__ (x) |
306 | #endif |
346 | #endif |
307 | |
347 | |
|
|
348 | #if _MSC_VER >= 1300 |
|
|
349 | #define ecb_deprecated __declspec (deprecated) |
|
|
350 | #else |
|
|
351 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
|
|
352 | #endif |
|
|
353 | |
|
|
354 | #if __MSC_VER >= 1500 |
|
|
355 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
|
|
356 | #elif ECB_GCC_VERSION(4,5) |
|
|
357 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
|
|
358 | #else |
|
|
359 | #define ecb_deprecated_message(msg) ecb_deprecated |
|
|
360 | #endif |
|
|
361 | |
|
|
362 | #if _MSC_VER >= 1400 |
|
|
363 | #define ecb_noinline __declspec (noinline) |
|
|
364 | #else |
308 | #define ecb_noinline ecb_attribute ((__noinline__)) |
365 | #define ecb_noinline ecb_attribute ((__noinline__)) |
|
|
366 | #endif |
|
|
367 | |
309 | #define ecb_unused ecb_attribute ((__unused__)) |
368 | #define ecb_unused ecb_attribute ((__unused__)) |
310 | #define ecb_const ecb_attribute ((__const__)) |
369 | #define ecb_const ecb_attribute ((__const__)) |
311 | #define ecb_pure ecb_attribute ((__pure__)) |
370 | #define ecb_pure ecb_attribute ((__pure__)) |
312 | |
371 | |
313 | #if ECB_C11 |
372 | /* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ |
|
|
373 | #if ECB_C11 || __IBMC_NORETURN |
|
|
374 | /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */ |
314 | #define ecb_noreturn _Noreturn |
375 | #define ecb_noreturn _Noreturn |
|
|
376 | #elif ECB_CPP11 |
|
|
377 | #define ecb_noreturn [[noreturn]] |
|
|
378 | #elif _MSC_VER >= 1200 |
|
|
379 | #define ecb_noreturn __declspec (noreturn) |
315 | #else |
380 | #else |
316 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
381 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
317 | #endif |
382 | #endif |
318 | |
383 | |
319 | #if ECB_GCC_VERSION(4,3) |
384 | #if ECB_GCC_VERSION(4,3) |
… | |
… | |
334 | /* for compatibility to the rest of the world */ |
399 | /* for compatibility to the rest of the world */ |
335 | #define ecb_likely(expr) ecb_expect_true (expr) |
400 | #define ecb_likely(expr) ecb_expect_true (expr) |
336 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
401 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
337 | |
402 | |
338 | /* count trailing zero bits and count # of one bits */ |
403 | /* count trailing zero bits and count # of one bits */ |
339 | #if ECB_GCC_VERSION(3,4) |
404 | #if ECB_GCC_VERSION(3,4) \ |
|
|
405 | || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ |
|
|
406 | && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ |
|
|
407 | && ECB_CLANG_BUILTIN(__builtin_popcount)) |
340 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
408 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
341 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
409 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
342 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
410 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
343 | #define ecb_ctz32(x) __builtin_ctz (x) |
411 | #define ecb_ctz32(x) __builtin_ctz (x) |
344 | #define ecb_ctz64(x) __builtin_ctzll (x) |
412 | #define ecb_ctz64(x) __builtin_ctzll (x) |
345 | #define ecb_popcount32(x) __builtin_popcount (x) |
413 | #define ecb_popcount32(x) __builtin_popcount (x) |
346 | /* no popcountll */ |
414 | /* no popcountll */ |
347 | #else |
415 | #else |
348 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
416 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
349 | ecb_function_ int |
417 | ecb_function_ ecb_const int |
350 | ecb_ctz32 (uint32_t x) |
418 | ecb_ctz32 (uint32_t x) |
351 | { |
419 | { |
352 | int r = 0; |
420 | int r = 0; |
353 | |
421 | |
354 | x &= ~x + 1; /* this isolates the lowest bit */ |
422 | x &= ~x + 1; /* this isolates the lowest bit */ |
… | |
… | |
368 | #endif |
436 | #endif |
369 | |
437 | |
370 | return r; |
438 | return r; |
371 | } |
439 | } |
372 | |
440 | |
373 | ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
441 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
374 | ecb_function_ int |
442 | ecb_function_ ecb_const int |
375 | ecb_ctz64 (uint64_t x) |
443 | ecb_ctz64 (uint64_t x) |
376 | { |
444 | { |
377 | int shift = x & 0xffffffffU ? 0 : 32; |
445 | int shift = x & 0xffffffffU ? 0 : 32; |
378 | return ecb_ctz32 (x >> shift) + shift; |
446 | return ecb_ctz32 (x >> shift) + shift; |
379 | } |
447 | } |
380 | |
448 | |
381 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
449 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
382 | ecb_function_ int |
450 | ecb_function_ ecb_const int |
383 | ecb_popcount32 (uint32_t x) |
451 | ecb_popcount32 (uint32_t x) |
384 | { |
452 | { |
385 | x -= (x >> 1) & 0x55555555; |
453 | x -= (x >> 1) & 0x55555555; |
386 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
454 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
387 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
455 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
388 | x *= 0x01010101; |
456 | x *= 0x01010101; |
389 | |
457 | |
390 | return x >> 24; |
458 | return x >> 24; |
391 | } |
459 | } |
392 | |
460 | |
393 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
461 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
394 | ecb_function_ int ecb_ld32 (uint32_t x) |
462 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
395 | { |
463 | { |
396 | int r = 0; |
464 | int r = 0; |
397 | |
465 | |
398 | if (x >> 16) { x >>= 16; r += 16; } |
466 | if (x >> 16) { x >>= 16; r += 16; } |
399 | if (x >> 8) { x >>= 8; r += 8; } |
467 | if (x >> 8) { x >>= 8; r += 8; } |
… | |
… | |
402 | if (x >> 1) { r += 1; } |
470 | if (x >> 1) { r += 1; } |
403 | |
471 | |
404 | return r; |
472 | return r; |
405 | } |
473 | } |
406 | |
474 | |
407 | ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
475 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
408 | ecb_function_ int ecb_ld64 (uint64_t x) |
476 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
409 | { |
477 | { |
410 | int r = 0; |
478 | int r = 0; |
411 | |
479 | |
412 | if (x >> 32) { x >>= 32; r += 32; } |
480 | if (x >> 32) { x >>= 32; r += 32; } |
413 | |
481 | |
414 | return r + ecb_ld32 (x); |
482 | return r + ecb_ld32 (x); |
415 | } |
483 | } |
416 | #endif |
484 | #endif |
417 | |
485 | |
418 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; |
486 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
419 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
487 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
420 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; |
488 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); |
421 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
489 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
422 | |
490 | |
423 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
491 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); |
424 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
492 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) |
425 | { |
493 | { |
426 | return ( (x * 0x0802U & 0x22110U) |
494 | return ( (x * 0x0802U & 0x22110U) |
427 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
495 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
428 | } |
496 | } |
429 | |
497 | |
430 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; |
498 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); |
431 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) |
499 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) |
432 | { |
500 | { |
433 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
501 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
434 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
502 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
435 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
503 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
436 | x = ( x >> 8 ) | ( x << 8); |
504 | x = ( x >> 8 ) | ( x << 8); |
437 | |
505 | |
438 | return x; |
506 | return x; |
439 | } |
507 | } |
440 | |
508 | |
441 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; |
509 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); |
442 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) |
510 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) |
443 | { |
511 | { |
444 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
512 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
445 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
513 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
446 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
514 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
447 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
515 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
… | |
… | |
450 | return x; |
518 | return x; |
451 | } |
519 | } |
452 | |
520 | |
453 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
521 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
454 | /* so for this version we are lazy */ |
522 | /* so for this version we are lazy */ |
455 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
523 | ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); |
456 | ecb_function_ int |
524 | ecb_function_ ecb_const int |
457 | ecb_popcount64 (uint64_t x) |
525 | ecb_popcount64 (uint64_t x) |
458 | { |
526 | { |
459 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
527 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
460 | } |
528 | } |
461 | |
529 | |
462 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
530 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); |
463 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
531 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); |
464 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
532 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); |
465 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
533 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); |
466 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
534 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
467 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
535 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
468 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
536 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
469 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
537 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
470 | |
538 | |
471 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
539 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
472 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
540 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
473 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
541 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
474 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
542 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
475 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
543 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
476 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
544 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
477 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
545 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
478 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
546 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
479 | |
547 | |
480 | #if ECB_GCC_VERSION(4,3) |
548 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
481 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
549 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
482 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
550 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
483 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
551 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
484 | #else |
552 | #else |
485 | ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
553 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
486 | ecb_function_ uint16_t |
554 | ecb_function_ ecb_const uint16_t |
487 | ecb_bswap16 (uint16_t x) |
555 | ecb_bswap16 (uint16_t x) |
488 | { |
556 | { |
489 | return ecb_rotl16 (x, 8); |
557 | return ecb_rotl16 (x, 8); |
490 | } |
558 | } |
491 | |
559 | |
492 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
560 | ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); |
493 | ecb_function_ uint32_t |
561 | ecb_function_ ecb_const uint32_t |
494 | ecb_bswap32 (uint32_t x) |
562 | ecb_bswap32 (uint32_t x) |
495 | { |
563 | { |
496 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
564 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
497 | } |
565 | } |
498 | |
566 | |
499 | ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
567 | ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); |
500 | ecb_function_ uint64_t |
568 | ecb_function_ ecb_const uint64_t |
501 | ecb_bswap64 (uint64_t x) |
569 | ecb_bswap64 (uint64_t x) |
502 | { |
570 | { |
503 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
571 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
504 | } |
572 | } |
505 | #endif |
573 | #endif |
506 | |
574 | |
507 | #if ECB_GCC_VERSION(4,5) |
575 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
508 | #define ecb_unreachable() __builtin_unreachable () |
576 | #define ecb_unreachable() __builtin_unreachable () |
509 | #else |
577 | #else |
510 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
578 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
511 | ecb_inline void ecb_unreachable (void) ecb_noreturn; |
579 | ecb_inline ecb_noreturn void ecb_unreachable (void); |
512 | ecb_inline void ecb_unreachable (void) { } |
580 | ecb_inline ecb_noreturn void ecb_unreachable (void) { } |
513 | #endif |
581 | #endif |
514 | |
582 | |
515 | /* try to tell the compiler that some condition is definitely true */ |
583 | /* try to tell the compiler that some condition is definitely true */ |
516 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
584 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
517 | |
585 | |
518 | ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
586 | ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); |
519 | ecb_inline unsigned char |
587 | ecb_inline ecb_const unsigned char |
520 | ecb_byteorder_helper (void) |
588 | ecb_byteorder_helper (void) |
521 | { |
589 | { |
522 | /* the union code still generates code under pressure in gcc, */ |
590 | /* the union code still generates code under pressure in gcc, */ |
523 | /* but less than using pointers, and always seems to */ |
591 | /* but less than using pointers, and always seems to */ |
524 | /* successfully return a constant. */ |
592 | /* successfully return a constant. */ |
… | |
… | |
539 | } u = { 0x11223344 }; |
607 | } u = { 0x11223344 }; |
540 | return u.c; |
608 | return u.c; |
541 | #endif |
609 | #endif |
542 | } |
610 | } |
543 | |
611 | |
544 | ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
612 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
545 | ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
613 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
546 | ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
614 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
547 | ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
615 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
548 | |
616 | |
549 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
617 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
550 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
618 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
551 | #else |
619 | #else |
552 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
620 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
553 | #endif |
621 | #endif |
554 | |
622 | |
555 | #if __cplusplus |
623 | #if ECB_CPP |
556 | template<typename T> |
624 | template<typename T> |
557 | static inline T ecb_div_rd (T val, T div) |
625 | static inline T ecb_div_rd (T val, T div) |
558 | { |
626 | { |
559 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
627 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
560 | } |
628 | } |
… | |
… | |
586 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
654 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
587 | #if 0 \ |
655 | #if 0 \ |
588 | || __i386 || __i386__ \ |
656 | || __i386 || __i386__ \ |
589 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
657 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
590 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
658 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
591 | || defined __arm__ && defined __ARM_EABI__ \ |
|
|
592 | || defined __s390__ || defined __s390x__ \ |
659 | || defined __s390__ || defined __s390x__ \ |
593 | || defined __mips__ \ |
660 | || defined __mips__ \ |
594 | || defined __alpha__ \ |
661 | || defined __alpha__ \ |
595 | || defined __hppa__ \ |
662 | || defined __hppa__ \ |
596 | || defined __ia64__ \ |
663 | || defined __ia64__ \ |
597 | || defined __m68k__ \ |
664 | || defined __m68k__ \ |
598 | || defined __m88k__ \ |
665 | || defined __m88k__ \ |
599 | || defined __sh__ \ |
666 | || defined __sh__ \ |
600 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 |
667 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ |
|
|
668 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
|
|
669 | || defined __aarch64__ |
601 | #define ECB_STDFP 1 |
670 | #define ECB_STDFP 1 |
602 | #include <string.h> /* for memcpy */ |
671 | #include <string.h> /* for memcpy */ |
603 | #else |
672 | #else |
604 | #define ECB_STDFP 0 |
673 | #define ECB_STDFP 0 |
605 | #endif |
674 | #endif |
… | |
… | |
619 | #define ECB_NAN NAN |
688 | #define ECB_NAN NAN |
620 | #else |
689 | #else |
621 | #define ECB_NAN ECB_INFINITY |
690 | #define ECB_NAN ECB_INFINITY |
622 | #endif |
691 | #endif |
623 | |
692 | |
|
|
693 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
|
|
694 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
|
|
695 | #else |
|
|
696 | #define ecb_ldexpf(x,e) (float) ldexp ((x), (e)) |
|
|
697 | #endif |
|
|
698 | |
624 | /* converts an ieee half/binary16 to a float */ |
699 | /* converts an ieee half/binary16 to a float */ |
625 | ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; |
700 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
626 | ecb_function_ float |
701 | ecb_function_ ecb_const float |
627 | ecb_binary16_to_float (uint16_t x) |
702 | ecb_binary16_to_float (uint16_t x) |
628 | { |
703 | { |
629 | int e = (x >> 10) & 0x1f; |
704 | int e = (x >> 10) & 0x1f; |
630 | int m = x & 0x3ff; |
705 | int m = x & 0x3ff; |
631 | float r; |
706 | float r; |
632 | |
707 | |
633 | if (!e ) r = ldexpf (m , -24); |
708 | if (!e ) r = ecb_ldexpf (m , -24); |
634 | else if (e != 31) r = ldexpf (m + 0x400, e - 25); |
709 | else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); |
635 | else if (m ) r = ECB_NAN; |
710 | else if (m ) r = ECB_NAN; |
636 | else r = ECB_INFINITY; |
711 | else r = ECB_INFINITY; |
637 | |
712 | |
638 | return x & 0x8000 ? -r : r; |
713 | return x & 0x8000 ? -r : r; |
639 | } |
714 | } |
640 | |
715 | |
641 | /* convert a float to ieee single/binary32 */ |
716 | /* convert a float to ieee single/binary32 */ |
642 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
717 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
643 | ecb_function_ uint32_t |
718 | ecb_function_ ecb_const uint32_t |
644 | ecb_float_to_binary32 (float x) |
719 | ecb_float_to_binary32 (float x) |
645 | { |
720 | { |
646 | uint32_t r; |
721 | uint32_t r; |
647 | |
722 | |
648 | #if ECB_STDFP |
723 | #if ECB_STDFP |
… | |
… | |
677 | |
752 | |
678 | return r; |
753 | return r; |
679 | } |
754 | } |
680 | |
755 | |
681 | /* converts an ieee single/binary32 to a float */ |
756 | /* converts an ieee single/binary32 to a float */ |
682 | ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; |
757 | ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); |
683 | ecb_function_ float |
758 | ecb_function_ ecb_const float |
684 | ecb_binary32_to_float (uint32_t x) |
759 | ecb_binary32_to_float (uint32_t x) |
685 | { |
760 | { |
686 | float r; |
761 | float r; |
687 | |
762 | |
688 | #if ECB_STDFP |
763 | #if ECB_STDFP |
… | |
… | |
698 | x |= 0x800000U; |
773 | x |= 0x800000U; |
699 | else |
774 | else |
700 | e = 1; |
775 | e = 1; |
701 | |
776 | |
702 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
777 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
703 | r = ldexpf (x * (0.5f / 0x800000U), e - 126); |
778 | r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); |
704 | |
779 | |
705 | r = neg ? -r : r; |
780 | r = neg ? -r : r; |
706 | #endif |
781 | #endif |
707 | |
782 | |
708 | return r; |
783 | return r; |
709 | } |
784 | } |
710 | |
785 | |
711 | /* convert a double to ieee double/binary64 */ |
786 | /* convert a double to ieee double/binary64 */ |
712 | ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; |
787 | ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); |
713 | ecb_function_ uint64_t |
788 | ecb_function_ ecb_const uint64_t |
714 | ecb_double_to_binary64 (double x) |
789 | ecb_double_to_binary64 (double x) |
715 | { |
790 | { |
716 | uint64_t r; |
791 | uint64_t r; |
717 | |
792 | |
718 | #if ECB_STDFP |
793 | #if ECB_STDFP |
… | |
… | |
747 | |
822 | |
748 | return r; |
823 | return r; |
749 | } |
824 | } |
750 | |
825 | |
751 | /* converts an ieee double/binary64 to a double */ |
826 | /* converts an ieee double/binary64 to a double */ |
752 | ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; |
827 | ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); |
753 | ecb_function_ double |
828 | ecb_function_ ecb_const double |
754 | ecb_binary64_to_double (uint64_t x) |
829 | ecb_binary64_to_double (uint64_t x) |
755 | { |
830 | { |
756 | double r; |
831 | double r; |
757 | |
832 | |
758 | #if ECB_STDFP |
833 | #if ECB_STDFP |