1 | /* |
1 | /* |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
3 | * |
3 | * |
4 | * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> |
4 | * Copyright (©) 2009-2013 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: |
… | |
… | |
64 | #define ECB_PTRSIZE 4 |
64 | #define ECB_PTRSIZE 4 |
65 | #endif |
65 | #endif |
66 | #endif |
66 | #endif |
67 | |
67 | |
68 | /* work around x32 idiocy by defining proper macros */ |
68 | /* work around x32 idiocy by defining proper macros */ |
69 | #if __x86_64 || _M_AMD64 |
69 | #if __amd64 || __x86_64 || _M_AMD64 || _M_X64 |
70 | #if _ILP32 |
70 | #if _ILP32 |
71 | #define ECB_AMD64_X32 1 |
71 | #define ECB_AMD64_X32 1 |
72 | #else |
72 | #else |
73 | #define ECB_AMD64 1 |
73 | #define ECB_AMD64 1 |
74 | #endif |
74 | #endif |
… | |
… | |
87 | #else |
87 | #else |
88 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
88 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
89 | #endif |
89 | #endif |
90 | #endif |
90 | #endif |
91 | |
91 | |
92 | #define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ |
|
|
93 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
|
|
94 | #define ECB_C11 (__STDC_VERSION__ >= 201112L) |
|
|
95 | #define ECB_CPP (__cplusplus+0) |
92 | #define ECB_CPP (__cplusplus+0) |
96 | #define ECB_CPP11 (__cplusplus >= 201103L) |
93 | #define ECB_CPP11 (__cplusplus >= 201103L) |
|
|
94 | |
|
|
95 | #if ECB_CPP |
|
|
96 | #define ECB_C 0 |
|
|
97 | #define ECB_STDC_VERSION 0 |
|
|
98 | #else |
|
|
99 | #define ECB_C 1 |
|
|
100 | #define ECB_STDC_VERSION __STDC_VERSION__ |
|
|
101 | #endif |
|
|
102 | |
|
|
103 | #define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
|
|
104 | #define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
97 | |
105 | |
98 | #if ECB_CPP |
106 | #if ECB_CPP |
99 | #define ECB_EXTERN_C extern "C" |
107 | #define ECB_EXTERN_C extern "C" |
100 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
108 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
101 | #define ECB_EXTERN_C_END } |
109 | #define ECB_EXTERN_C_END } |
… | |
… | |
134 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
142 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
135 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
143 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
136 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
144 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
137 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
145 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
138 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
146 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
139 | #elif __sparc || __sparc__ |
147 | #elif (__sparc || __sparc__) && !__sparcv8 |
140 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
148 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
141 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
149 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
142 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
150 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
143 | #elif defined __s390__ || defined __s390x__ |
151 | #elif defined __s390__ || defined __s390x__ |
144 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
152 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
… | |
… | |
165 | |
173 | |
166 | #ifndef ECB_MEMORY_FENCE |
174 | #ifndef ECB_MEMORY_FENCE |
167 | #if ECB_GCC_VERSION(4,7) |
175 | #if ECB_GCC_VERSION(4,7) |
168 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
176 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
169 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
177 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
|
|
178 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
|
|
179 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
170 | |
180 | |
171 | /* The __has_feature syntax from clang is so misdesigned that we cannot use it |
181 | /* The __has_feature syntax from clang is so misdesigned that we cannot use it |
172 | * without risking compile time errors with other compilers. We *could* |
182 | * without risking compile time errors with other compilers. We *could* |
173 | * define our own ecb_clang_has_feature, but I just can't be bothered to work |
183 | * define our own ecb_clang_has_feature, but I just can't be bothered to work |
174 | * around this shit time and again. |
184 | * around this shit time and again. |
175 | * #elif defined __clang && __has_feature (cxx_atomic) |
185 | * #elif defined __clang && __has_feature (cxx_atomic) |
176 | * // see comment below (stdatomic.h) about the C11 memory model. |
186 | * // see comment below (stdatomic.h) about the C11 memory model. |
177 | * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
187 | * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
|
|
188 | * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
|
|
189 | * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
178 | */ |
190 | */ |
179 | |
191 | |
180 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
192 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
181 | #define ECB_MEMORY_FENCE __sync_synchronize () |
193 | #define ECB_MEMORY_FENCE __sync_synchronize () |
|
|
194 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
|
|
195 | /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
|
|
196 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
|
|
197 | #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
|
|
198 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
|
|
199 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
182 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
200 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
183 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
201 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
184 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
202 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
185 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
203 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
186 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
204 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
… | |
… | |
206 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
224 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
207 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
225 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
208 | /* for most usages, or gcc and clang have a bug */ |
226 | /* for most usages, or gcc and clang have a bug */ |
209 | /* I *currently* lean towards the latter, and inefficiently implement */ |
227 | /* I *currently* lean towards the latter, and inefficiently implement */ |
210 | /* all three of ecb's fences as a seq_cst fence */ |
228 | /* all three of ecb's fences as a seq_cst fence */ |
|
|
229 | /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ |
|
|
230 | /* for all __atomic_thread_fence's except seq_cst */ |
211 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
231 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
212 | #endif |
232 | #endif |
213 | #endif |
233 | #endif |
214 | |
234 | |
215 | #ifndef ECB_MEMORY_FENCE |
235 | #ifndef ECB_MEMORY_FENCE |
… | |
… | |
272 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
292 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
273 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
293 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
274 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
294 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
275 | #else |
295 | #else |
276 | #define ecb_attribute(attrlist) |
296 | #define ecb_attribute(attrlist) |
|
|
297 | |
|
|
298 | /* possible C11 impl for integral types |
|
|
299 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
|
|
300 | #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ |
|
|
301 | |
277 | #define ecb_is_constant(expr) 0 |
302 | #define ecb_is_constant(expr) 0 |
278 | #define ecb_expect(expr,value) (expr) |
303 | #define ecb_expect(expr,value) (expr) |
279 | #define ecb_prefetch(addr,rw,locality) |
304 | #define ecb_prefetch(addr,rw,locality) |
280 | #endif |
305 | #endif |
281 | |
306 | |
… | |
… | |
587 | |
612 | |
588 | #ifndef ECB_NO_LIBM |
613 | #ifndef ECB_NO_LIBM |
589 | |
614 | |
590 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
615 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
591 | |
616 | |
|
|
617 | /* only the oldest of old doesn't have this one. solaris. */ |
|
|
618 | #ifdef INFINITY |
|
|
619 | #define ECB_INFINITY INFINITY |
|
|
620 | #else |
|
|
621 | #define ECB_INFINITY HUGE_VAL |
|
|
622 | #endif |
|
|
623 | |
592 | #ifdef NEN |
624 | #ifdef NAN |
593 | #define ECB_NAN NAN |
625 | #define ECB_NAN NAN |
594 | #else |
626 | #else |
595 | #define ECB_NAN INFINITY |
627 | #define ECB_NAN ECB_INFINITY |
596 | #endif |
628 | #endif |
597 | |
629 | |
598 | /* converts an ieee half/binary16 to a float */ |
630 | /* converts an ieee half/binary16 to a float */ |
599 | ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; |
631 | ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; |
600 | ecb_function_ float |
632 | ecb_function_ float |
… | |
… | |
605 | float r; |
637 | float r; |
606 | |
638 | |
607 | if (!e ) r = ldexpf (m , -24); |
639 | if (!e ) r = ldexpf (m , -24); |
608 | else if (e != 31) r = ldexpf (m + 0x400, e - 25); |
640 | else if (e != 31) r = ldexpf (m + 0x400, e - 25); |
609 | else if (m ) r = ECB_NAN; |
641 | else if (m ) r = ECB_NAN; |
610 | else r = INFINITY; |
642 | else r = ECB_INFINITY; |
611 | |
643 | |
612 | return x & 0x8000 ? -r : r; |
644 | return x & 0x8000 ? -r : r; |
613 | } |
645 | } |
614 | |
646 | |
615 | /* convert a float to ieee single/binary32 */ |
647 | /* convert a float to ieee single/binary32 */ |