[PATCH] float128: Extend __MATH_TG for float128 support

[Gabriel F. T. Gomes]

2017-02-23  Gabriel F. T. Gomes  <gftg@linux.vnet.ibm.com>
	    Tulio Magno Quites Machado Filho  <tuliom@linux.vnet.ibm.com>

	* math/math.h (__MATH_TG): Extend the conditions to add
	_Float128 support.
---
 math/math.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/math/math.h b/math/math.h
index 2d1508e..af99e8b 100644
--- a/math/math.h
+++ b/math/math.h
@@ -343,6 +343,27 @@ extern int signgam;
 #ifdef __NO_LONG_DOUBLE_MATH
 # define __MATH_TG(TG_ARG, FUNC, ARGS)					\
   (sizeof (TG_ARG) == sizeof (float) ? FUNC ## f ARGS : FUNC ARGS)
+#elif __HAVE_DISTINCT_FLOAT128
+# if __USE_ISOC11
+#  define __MATH_TG(TG_ARG, FUNC, ARGS)		\
+     _Generic ((TG_ARG),			\
+	       float: FUNC ## f ARGS,		\
+	       default: FUNC ARGS,		\
+	       long double: FUNC ## l ARGS,	\
+	       _Float128: FUNC ## f128 ARGS)
+# else
+#  define __MATH_TG(TG_ARG, FUNC, ARGS)					\
+     __builtin_choose_expr						\
+     (__builtin_types_compatible_p (__typeof (TG_ARG), float),		\
+      FUNC ## f ARGS,							\
+      __builtin_choose_expr						\
+      (__builtin_types_compatible_p (__typeof (TG_ARG), double),	\
+       FUNC ARGS,							\
+       __builtin_choose_expr						\
+       (__builtin_types_compatible_p (__typeof (TG_ARG), long double),	\
+	FUNC ## l ARGS,							\
+	FUNC ## f128 ARGS)))
+# endif
 #else
 # define __MATH_TG(TG_ARG, FUNC, ARGS)		\
   (sizeof (TG_ARG) == sizeof (float)		\
-- 
2.4.11