2011-08-01 Paolo Carlini <paolo.carlini@oracle.com>

	PR c++/49813
	* include/c_global/cmath (isinf): Remove workaround.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@177070 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index c8ac5d1..3a832f7 100644 (file)
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2011-08-01  Paolo Carlini  <paolo.carlini@oracle.com>
+
+       PR c++/49813
+       * include/c_global/cmath (isinf): Remove workaround.
+
 2011-07-31  Paolo Carlini  <paolo.carlini@oracle.com>
 
        PR libstdc++/49925

diff --git a/libstdc++-v3/include/c_global/cmath b/libstdc++-v3/include/c_global/cmath
index 4a75d0e..1eeded8 100644 (file)
--- a/libstdc++-v3/include/c_global/cmath
+++ b/libstdc++-v3/include/c_global/cmath
@@ -547,18 +547,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     isfinite(_Tp __x)
     { return true; }
 
-  // Workaround the isinf issue discussed in PR 49813.
   constexpr bool
   isinf(float __x)
-  { return fpclassify(__x) == FP_INFINITE; }
+  { return __builtin_isinf(__x); }
 
   constexpr bool
   isinf(double __x)
-  { return fpclassify(__x) == FP_INFINITE; }
+  { return __builtin_isinf(__x); }
 
   constexpr bool
   isinf(long double __x)
-  { return fpclassify(__x) == FP_INFINITE; }
+  { return __builtin_isinf(__x); }
 
   template<typename _Tp>
     constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,