1 files changed, 82 insertions, 0 deletions
diff --git a/math/test-nearbyint-except.c b/math/test-nearbyint-except.c
new file mode 100644
index 0000000000..86491eda58
--- /dev/null
+++ b/math/test-nearbyint-except.c
@@ -0,0 +1,82 @@
+/* Test nearbyint functions do not clear exceptions (bug 15491).
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <math.h>
+#include <stdio.h>
+
+#include <math-tests.h>
+
+#ifndef FE_INVALID
+# define FE_INVALID 0
+#endif
+
+#define TEST_FUNC(NAME, FLOAT, SUFFIX)					\
+static int								\
+NAME (void)								\
+{									\
+  int result = 0;							\
+  volatile FLOAT a, b __attribute__ ((unused));				\
+  a = 1.0;								\
+  /* nearbyint must not clear already-raised exceptions.  */		\
+  feraiseexcept (FE_ALL_EXCEPT);					\
+  b = nearbyint ## SUFFIX (a);						\
+  if (fetestexcept (FE_ALL_EXCEPT) == FE_ALL_EXCEPT)			\
+    puts ("PASS: " #FLOAT);						\
+  else									\
+    {									\
+      puts ("FAIL: " #FLOAT);						\
+      result = 1;							\
+    }									\
+  /* But it mustn't lose exceptions from sNaN arguments.  */		\
+  if (SNAN_TESTS (FLOAT) && EXCEPTION_TESTS (FLOAT))			\
+    {									\
+      static volatile FLOAT snan = __builtin_nans ## SUFFIX ("");	\
+      volatile FLOAT c __attribute__ ((unused));			\
+      feclearexcept (FE_ALL_EXCEPT);					\
+      c = nearbyint ## SUFFIX (snan);					\
+      if (fetestexcept (FE_INVALID) == FE_INVALID)			\
+	puts ("PASS: " #FLOAT " sNaN");					\
+      else								\
+	{								\
+	  puts ("FAIL: " #FLOAT " sNaN");				\
+	  result = 1;							\
+	}								\
+    }									\
+  return result;							\
+}
+
+TEST_FUNC (float_test, float, f)
+TEST_FUNC (double_test, double, )
+#ifndef NO_LONG_DOUBLE
+TEST_FUNC (ldouble_test, long double, l)
+#endif
+
+static int
+do_test (void)
+{
+  int result = float_test ();
+  result |= double_test ();
+#ifndef NO_LONG_DOUBLE
+  result |= ldouble_test ();
+#endif
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"