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authorThomas Schwinge <thomas@codesourcery.com>2013-04-02 13:51:02 +0200
committerThomas Schwinge <thomas@codesourcery.com>2013-04-02 13:51:02 +0200
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parent60c414c346a1d5ef0510ffbdc0ab75f288ee4d3f (diff)
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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.
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@@ -387,6 +387,14 @@ to
@end smallexample
@end deftypefn
+@comment math.h
+@comment GNU
+@deftypefn {Macro} int issignaling (@emph{float-type} @var{x})
+This macro returns a nonzero value if @var{x} is a signaling NaN
+(sNaN). It is based on draft TS 18661 and currently enabled as a GNU
+extension.
+@end deftypefn
+
Another set of floating-point classification functions was provided by
BSD. @Theglibc{} also supports these functions; however, we
recommend that you use the ISO C99 macros in new code. Those are standard