target-supports.exp (check_effective_target_issignaling): New procedure.

	* lib/target-supports.exp (check_effective_target_issignaling):
	New procedure.
	* gcc.dg/pr61441.c: Require issignaling effective target.

From-SVN: r232381

gcc/testsuite/ChangeLog

+2016-01-14  Uros Bizjak  <ubizjak@gmail.com>
+
+	* lib/target-supports.exp (check_effective_target_issignaling):
+	New procedure.
+	* gcc.dg/pr61441.c: Require issignaling effective target.
+
 2016-01-14  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	PR target/68803

gcc/testsuite/gcc.dg/pr61441.c

 /* { dg-do run { target { *-*-linux* *-*-gnu* } } } */
 /* { dg-options "-O1 -lm -fexcess-precision=standard" } */
+/* { dg-require-effective-target issignaling } */
 
 #define _GNU_SOURCE
 #include <stdio.h>

gcc/testsuite/lib/target-supports.exp

@@ -6287,8 +6287,19 @@ proc check_effective_target_pow10 { } {
     } "-lm" ]
 }
 
-# Return 1 if current options generate DFP instructions, 0 otherwise.
+# Return 1 if issignaling function exists.
+proc check_effective_target_issignaling {} {
+    return [check_runtime issignaling {
+	#define _GNU_SOURCE
+	#include <math.h>
+	int main ()
+	{
+	  return issignaling (0.0);
+	}
+    } "-lm" ]
+}
 
+# Return 1 if current options generate DFP instructions, 0 otherwise.
 proc check_effective_target_hard_dfp {} {
     return [check_no_messages_and_pattern hard_dfp "!adddd3" assembly {
 	typedef float d64 __attribute__((mode(DD)));