LLVM API Documentation
00001 //===-- IsInf.cpp - Platform-independent wrapper around C99 isinf() -------===// 00002 // 00003 // The LLVM Compiler Infrastructure 00004 // 00005 // This file was developed by the LLVM research group and is distributed under 00006 // the University of Illinois Open Source License. See LICENSE.TXT for details. 00007 // 00008 //===----------------------------------------------------------------------===// 00009 00010 #include "llvm/Config/config.h" 00011 #include "llvm/System/IncludeFile.h" 00012 00013 #if HAVE_ISINF_IN_MATH_H 00014 # include <math.h> 00015 #elif HAVE_ISINF_IN_CMATH 00016 # include <cmath> 00017 #elif HAVE_STD_ISINF_IN_CMATH 00018 # include <cmath> 00019 using std::isinf; 00020 #elif HAVE_FINITE_IN_IEEEFP_H 00021 // A handy workaround I found at http://www.unixguide.net/sun/faq ... 00022 // apparently this has been a problem with Solaris for years. 00023 # include <ieeefp.h> 00024 static int isinf(double x) { return !finite(x) && x==x; } 00025 #elif defined(_MSC_VER) 00026 #include <float.h> 00027 #define isinf(X) (!_finite(X)) 00028 #elif defined(_AIX) && defined(__GNUC__) 00029 // GCC's fixincludes seems to be removing the isinf() declaration from the 00030 // system header /usr/include/math.h 00031 # include <math.h> 00032 static int isinf(double x) { return !finite(x) && x==x; } 00033 #elif defined(__hpux) 00034 // HP-UX is "special" 00035 #include <math.h> 00036 static int isinf(double x) { return ((x)==INFINITY)||((x)==-INFINITY); } 00037 #else 00038 # error "Don't know how to get isinf()" 00039 #endif 00040 00041 namespace llvm { 00042 00043 int IsInf (float f) { return isinf (f); } 00044 int IsInf (double d) { return isinf (d); } 00045 00046 } // end namespace llvm; 00047 00048 DEFINING_FILE_FOR(SupportIsInf)