lib/Support/IsInf.cpp

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