From 572676160d5639edc0ecb663147bd291841458d1 Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <thomas@codesourcery.com>
Date: Tue, 2 Apr 2013 13:51:02 +0200
Subject: New <math.h> macro named issignaling to check for a signaling NaN
 (sNaN).

It is based on draft TS 18661 and currently enabled as a GNU extension.
---
 math/bits/mathcalls.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'math/bits')

diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index e5af507..870c54c 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -360,6 +360,12 @@ __MATHCALL (fma,, (_Mdouble_ __x, _Mdouble_ __y, _Mdouble_ __z));
 __END_NAMESPACE_C99
 #endif
 
+#ifdef __USE_GNU
+/* Test for signaling NaN.  */
+__MATHDECL_1 (int, __issignaling,, (_Mdouble_ __value))
+     __attribute__ ((__const__));
+#endif
+
 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
 /* Return X times (2 to the Nth power).  */
 __MATHCALL (scalb,, (_Mdouble_ __x, _Mdouble_ __n));
-- 
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