IsInf.cpp revision 256281
1236769Sobrien//===-- IsInf.cpp - Platform-independent wrapper around C99 isinf() -------===// 2236769Sobrien// 3236769Sobrien// The LLVM Compiler Infrastructure 4236769Sobrien// 5236769Sobrien// This file is distributed under the University of Illinois Open Source 6236769Sobrien// License. See LICENSE.TXT for details. 7236769Sobrien// 8236769Sobrien//===----------------------------------------------------------------------===// 9236769Sobrien// 10236769Sobrien// Platform-independent wrapper around C99 isinf() 11236769Sobrien// 12236769Sobrien//===----------------------------------------------------------------------===// 13236769Sobrien 14236769Sobrien#include "llvm/Config/config.h" 15236769Sobrien 16236769Sobrien#if HAVE_ISINF_IN_MATH_H 17236769Sobrien# include <math.h> 18236769Sobrien#elif HAVE_ISINF_IN_CMATH 19236769Sobrien# include <cmath> 20236769Sobrien#elif HAVE_STD_ISINF_IN_CMATH 21236769Sobrien# include <cmath> 22236769Sobrienusing std::isinf; 23236769Sobrien#elif HAVE_FINITE_IN_IEEEFP_H 24236769Sobrien// A handy workaround I found at http://www.unixguide.net/sun/faq ... 25236769Sobrien// apparently this has been a problem with Solaris for years. 26236769Sobrien# include <ieeefp.h> 27236769Sobrienstatic int isinf(double x) { return !finite(x) && x==x; } 28236769Sobrien#elif defined(_MSC_VER) 29236769Sobrien#include <float.h> 30236769Sobrien#define isinf(X) (!_finite(X)) 31236769Sobrien#elif defined(_AIX) && defined(__GNUC__) 32236769Sobrien// GCC's fixincludes seems to be removing the isinf() declaration from the 33236769Sobrien// system header /usr/include/math.h 34236769Sobrien# include <math.h> 35236769Sobrienstatic int isinf(double x) { return !finite(x) && x==x; } 36236769Sobrien#elif defined(__hpux) 37236769Sobrien// HP-UX is "special" 38236769Sobrien#include <math.h> 39236769Sobrienstatic int isinf(double x) { return ((x) == INFINITY) || ((x) == -INFINITY); } 40236769Sobrien#else 41236769Sobrien# error "Don't know how to get isinf()" 42236769Sobrien#endif 43236769Sobrien 44236769Sobriennamespace llvm { 45236769Sobrien 46236769Sobrienint IsInf(float f) { return isinf(f); } 47236769Sobrienint IsInf(double d) { return isinf(d); } 48236769Sobrien 49236769Sobrien} // end namespace llvm; 50236769Sobrien