From 485dedbc22da55e181409609709313cff688d4e4 Mon Sep 17 00:00:00 2001
From: paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 1 Oct 2012 23:10:02 +0000
Subject: 2012-10-01  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/54757
	* include/ext/random (rice_distribution<>::operator()): Use std::hypot
	only if _GLIBCXX_USE_C99_MATH_TR1.
	* include/ext/random.tcc (rice_distribution<>::__generate_impl):
	Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@191944 138bc75d-0d04-0410-961f-82ee72b054a4
---
 libstdc++-v3/include/ext/random     | 8 ++++++++
 libstdc++-v3/include/ext/random.tcc | 4 ++++
 2 files changed, 12 insertions(+)

(limited to 'libstdc++-v3/include/ext')

diff --git a/libstdc++-v3/include/ext/random b/libstdc++-v3/include/ext/random
index 884e8a0ca91..8c40d6d420a 100644
--- a/libstdc++-v3/include/ext/random
+++ b/libstdc++-v3/include/ext/random
@@ -1042,7 +1042,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	{
 	  result_type __x = this->_M_ndx(__urng);
 	  result_type __y = this->_M_ndy(__urng);
+#if _GLIBCXX_USE_C99_MATH_TR1
 	  return std::hypot(__x, __y);
+#else
+	  return std::sqrt(__x * __x + __y * __y);
+#endif
 	}
 
       template<typename _UniformRandomNumberGenerator>
@@ -1054,7 +1058,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	    __px(__p.nu(), __p.sigma()), __py(result_type(0), __p.sigma());
 	  result_type __x = this->_M_ndx(__px, __urng);
 	  result_type __y = this->_M_ndy(__py, __urng);
+#if _GLIBCXX_USE_C99_MATH_TR1
 	  return std::hypot(__x, __y);
+#else
+	  return std::sqrt(__x * __x + __y * __y);
+#endif
 	}
 
       template<typename _ForwardIterator,
diff --git a/libstdc++-v3/include/ext/random.tcc b/libstdc++-v3/include/ext/random.tcc
index 86bb67fedf9..4151daff83d 100644
--- a/libstdc++-v3/include/ext/random.tcc
+++ b/libstdc++-v3/include/ext/random.tcc
@@ -732,7 +732,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	      __px(__p.nu(), __p.sigma()), __py(result_type(0), __p.sigma());
 	    result_type __x = this->_M_ndx(__px, __urng);
 	    result_type __y = this->_M_ndy(__py, __urng);
+#if _GLIBCXX_USE_C99_MATH_TR1
 	    *__f++ = std::hypot(__x, __y);
+#else
+	    *__f++ = std::sqrt(__x * __x + __y * __y);
+#endif
 	  }
       }
 
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