IsInf.cpp revision 285830
1//===-- IsInf.cpp - Platform-independent wrapper around C99 isinf() -------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// Platform-independent wrapper around C99 isinf() 11// 12//===----------------------------------------------------------------------===// 13 14#include "llvm/Config/config.h" 15 16#if HAVE_ISINF_IN_MATH_H 17# include <math.h> 18#elif HAVE_ISINF_IN_CMATH 19# include <cmath> 20#elif HAVE_STD_ISINF_IN_CMATH 21# include <cmath> 22using std::isinf; 23#elif HAVE_FINITE_IN_IEEEFP_H 24// A handy workaround I found at http://www.unixguide.net/sun/faq ... 25// apparently this has been a problem with Solaris for years. 26# include <ieeefp.h> 27static int isinf(double x) { return !finite(x) && x==x; } 28#elif defined(_MSC_VER) 29#include <float.h> 30#define isinf(X) (!_finite(X)) 31#elif defined(_AIX) && defined(__GNUC__) 32// GCC's fixincludes seems to be removing the isinf() declaration from the 33// system header /usr/include/math.h 34# include <math.h> 35static int isinf(double x) { return !finite(x) && x==x; } 36#elif defined(__hpux) 37// HP-UX is "special" 38#include <math.h> 39static int isinf(double x) { return ((x) == INFINITY) || ((x) == -INFINITY); } 40#else 41# error "Don't know how to get isinf()" 42#endif 43 44namespace llvm { 45 46int IsInf(float f) { return isinf(f); } 47int IsInf(double d) { return isinf(d); } 48 49} // end namespace llvm; 50