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> 22 using 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> 27 static 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> 35 static int isinf(double x) { return !finite(x) && x==x; } 36 #elif defined(__hpux) 37 // HP-UX is "special" 38 #include <math.h> 39 static int isinf(double x) { return ((x) == INFINITY) || ((x) == -INFINITY); } 40 #else 41 # error "Don't know how to get isinf()" 42 #endif 43 44 namespace llvm { 45 46 int IsInf(float f) { return isinf(f); } 47 int IsInf(double d) { return isinf(d); } 48 49 } // end namespace llvm; 50
