--- libecb/ecb.h 2012/06/29 01:39:51 1.108 +++ libecb/ecb.h 2014/10/17 10:56:48 1.143 @@ -1,7 +1,7 @@ /* * libecb - http://software.schmorp.de/pkg/libecb * - * Copyright (©) 2009-2012 Marc Alexander Lehmann + * Copyright (©) 2009-2014 Marc Alexander Lehmann * Copyright (©) 2011 Emanuele Giaquinta * All rights reserved. * @@ -25,13 +25,24 @@ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License ("GPL") version 2 or any later version, + * in which case the provisions of the GPL are applicable instead of + * the above. If you wish to allow the use of your version of this file + * only under the terms of the GPL and not to allow others to use your + * version of this file under the BSD license, indicate your decision + * by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL. If you do not delete the + * provisions above, a recipient may use your version of this file under + * either the BSD or the GPL. */ #ifndef ECB_H #define ECB_H /* 16 bits major, 16 bits minor */ -#define ECB_VERSION 0x00010001 +#define ECB_VERSION 0x00010004 #ifdef _WIN32 typedef signed char int8_t; @@ -65,6 +76,15 @@ #endif #endif +/* work around x32 idiocy by defining proper macros */ +#if __amd64 || __x86_64 || _M_AMD64 || _M_X64 + #if _ILP32 + #define ECB_AMD64_X32 1 + #else + #define ECB_AMD64 1 + #endif +#endif + /* many compilers define _GNUC_ to some versions but then only implement * what their idiot authors think are the "more important" extensions, * causing enormous grief in return for some better fake benchmark numbers. @@ -72,21 +92,41 @@ * we try to detect these and simply assume they are not gcc - if they have * an issue with that they should have done it right in the first place. */ -#ifndef ECB_GCC_VERSION - #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ - #define ECB_GCC_VERSION(major,minor) 0 - #else - #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) - #endif +#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ + #define ECB_GCC_VERSION(major,minor) 0 +#else + #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) +#endif + +#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) + +#if __clang__ && defined(__has_builtin) + #define ECB_CLANG_BUILTIN(x) __has_builtin(x) +#else + #define ECB_CLANG_BUILTIN(x) 0 +#endif + +#if __clang__ && defined(__has_extension) + #define ECB_CLANG_EXTENSION(x) __has_extension(x) +#else + #define ECB_CLANG_EXTENSION(x) 0 #endif -#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ -#define ECB_C99 (__STDC_VERSION__ >= 199901L) -#define ECB_C11 (__STDC_VERSION__ >= 201112L) #define ECB_CPP (__cplusplus+0) #define ECB_CPP11 (__cplusplus >= 201103L) #if ECB_CPP + #define ECB_C 0 + #define ECB_STDC_VERSION 0 +#else + #define ECB_C 1 + #define ECB_STDC_VERSION __STDC_VERSION__ +#endif + +#define ECB_C99 (ECB_STDC_VERSION >= 199901L) +#define ECB_C11 (ECB_STDC_VERSION >= 201112L) + +#if ECB_CPP #define ECB_EXTERN_C extern "C" #define ECB_EXTERN_C_BEG ECB_EXTERN_C { #define ECB_EXTERN_C_END } @@ -127,14 +167,18 @@ #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") - #elif __sparc || __sparc__ + #elif __aarch64__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") + #elif (__sparc || __sparc__) && !__sparcv8 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") #elif defined __s390__ || defined __s390x__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") #elif defined __mips__ - #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") + /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ + /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ + #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") #elif defined __alpha__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") #elif defined __hppa__ @@ -142,6 +186,12 @@ #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif defined __ia64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") + #elif defined __m68k__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") + #elif defined __m88k__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") + #elif defined __sh__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #endif #endif #endif @@ -150,11 +200,23 @@ #if ECB_GCC_VERSION(4,7) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) - /*#elif defined __clang && __has_feature (cxx_atomic)*/ + #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) + #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) + + #elif ECB_CLANG_EXTENSION(c_atomic) /* see comment below (stdatomic.h) about the C11 memory model. */ - /*#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)*/ + #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) + #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) + #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) + #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ #define ECB_MEMORY_FENCE __sync_synchronize () + #elif _MSC_VER >= 1500 /* VC++ 2008 */ + /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ + #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) + #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() + #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ + #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() #elif _MSC_VER >= 1400 /* VC++ 2005 */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier () @@ -184,6 +246,8 @@ /* for most usages, or gcc and clang have a bug */ /* I *currently* lean towards the latter, and inefficiently implement */ /* all three of ecb's fences as a seq_cst fence */ + /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ + /* for all __atomic_thread_fence's except seq_cst */ #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) #endif #endif @@ -243,23 +307,45 @@ #define ecb_function_ ecb_inline -#if ECB_GCC_VERSION(3,1) - #define ecb_attribute(attrlist) __attribute__(attrlist) - #define ecb_is_constant(expr) __builtin_constant_p (expr) - #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) - #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) + #define ecb_attribute(attrlist) __attribute__ (attrlist) #else #define ecb_attribute(attrlist) +#endif + +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) + #define ecb_is_constant(expr) __builtin_constant_p (expr) +#else + /* possible C11 impl for integral types + typedef struct ecb_is_constant_struct ecb_is_constant_struct; + #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ + #define ecb_is_constant(expr) 0 +#endif + +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) + #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) +#else #define ecb_expect(expr,value) (expr) +#endif + +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) + #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) +#else #define ecb_prefetch(addr,rw,locality) #endif /* no emulation for ecb_decltype */ -#if ECB_GCC_VERSION(4,5) - #define ecb_decltype(x) __decltype(x) -#elif ECB_GCC_VERSION(3,0) - #define ecb_decltype(x) __typeof(x) +#if ECB_CPP11 + #define ecb_decltype(x) decltype (x) +#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) + #define ecb_decltype(x) __typeof__ (x) +#endif + +#if _MSC_VER >= 1300 + #define ecb_deprecated __declspec(deprecated) +#else + #define ecb_deprecated ecb_attribute ((__deprecated__)) #endif #define ecb_noinline ecb_attribute ((__noinline__)) @@ -267,6 +353,7 @@ #define ecb_const ecb_attribute ((__const__)) #define ecb_pure ecb_attribute ((__pure__)) +/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ #if ECB_C11 #define ecb_noreturn _Noreturn #else @@ -293,7 +380,10 @@ #define ecb_unlikely(expr) ecb_expect_false (expr) /* count trailing zero bits and count # of one bits */ -#if ECB_GCC_VERSION(3,4) +#if ECB_GCC_VERSION(3,4) \ + || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ + && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ + && ECB_CLANG_BUILTIN(__builtin_popcount)) /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ #define ecb_ld32(x) (__builtin_clz (x) ^ 31) #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) @@ -434,7 +524,7 @@ ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } -#if ECB_GCC_VERSION(4,3) +#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) #define ecb_bswap32(x) __builtin_bswap32 (x) #define ecb_bswap64(x) __builtin_bswap64 (x) @@ -461,7 +551,7 @@ } #endif -#if ECB_GCC_VERSION(4,5) +#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) #define ecb_unreachable() __builtin_unreachable () #else /* this seems to work fine, but gcc always emits a warning for it :/ */ @@ -477,17 +567,17 @@ ecb_byteorder_helper (void) { /* the union code still generates code under pressure in gcc, */ - /* but less than using pointers, and always seem to */ + /* but less than using pointers, and always seems to */ /* successfully return a constant. */ /* the reason why we have this horrible preprocessor mess */ /* is to avoid it in all cases, at least on common architectures */ - /* and yes, gcc defines __BYTE_ORDER__, g++ does not */ + /* or when using a recent enough gcc version (>= 4.6) */ #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 return 0x44; #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ return 0x44; #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ - retrurn 0x11; + return 0x11; #else union { @@ -545,13 +635,17 @@ || __i386 || __i386__ \ || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ - || defined __arm__ && defined __ARM_EABI__ \ || defined __s390__ || defined __s390x__ \ || defined __mips__ \ || defined __alpha__ \ || defined __hppa__ \ || defined __ia64__ \ - || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 + || defined __m68k__ \ + || defined __m88k__ \ + || defined __sh__ \ + || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ + || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ + || defined __aarch64__ #define ECB_STDFP 1 #include /* for memcpy */ #else @@ -560,6 +654,38 @@ #ifndef ECB_NO_LIBM + #include /* for frexp*, ldexp*, INFINITY, NAN */ + + /* only the oldest of old doesn't have this one. solaris. */ + #ifdef INFINITY + #define ECB_INFINITY INFINITY + #else + #define ECB_INFINITY HUGE_VAL + #endif + + #ifdef NAN + #define ECB_NAN NAN + #else + #define ECB_NAN ECB_INFINITY + #endif + + /* converts an ieee half/binary16 to a float */ + ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; + ecb_function_ float + ecb_binary16_to_float (uint16_t x) + { + int e = (x >> 10) & 0x1f; + int m = x & 0x3ff; + float r; + + if (!e ) r = ldexpf (m , -24); + else if (e != 31) r = ldexpf (m + 0x400, e - 25); + else if (m ) r = ECB_NAN; + else r = ECB_INFINITY; + + return x & 0x8000 ? -r : r; + } + /* convert a float to ieee single/binary32 */ ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; ecb_function_ uint32_t @@ -571,7 +697,6 @@ memcpy (&r, &x, 4); #else /* slow emulation, works for anything but -0 */ - ECB_EXTERN_C float frexpf (float v, int *e); uint32_t m; int e; @@ -612,8 +737,6 @@ memcpy (&r, &x, 4); #else /* emulation, only works for normals and subnormals and +0 */ - ECB_EXTERN_C float ldexpf (float x, int e); - int neg = x >> 31; int e = (x >> 23) & 0xffU; @@ -644,7 +767,6 @@ memcpy (&r, &x, 8); #else /* slow emulation, works for anything but -0 */ - ECB_EXTERN_C double frexp (double v, int *e); uint64_t m; int e; @@ -685,8 +807,6 @@ memcpy (&r, &x, 8); #else /* emulation, only works for normals and subnormals and +0 */ - ECB_EXTERN_C double ldexp (double x, int e); - int neg = x >> 63; int e = (x >> 52) & 0x7ffU;