[PATCH 11/12] ldbl-128ibm-compat: Redirect complex math functions

[Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>]

From: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>

The API doesn't change, i.e. compilers using a long double format compatible
with the IEEE 128-bit extended precision format are redirected from *l
functions to __*ieee128 symbols using the same mechanism already
used with -mlong-double-64 for complex math functions.

2018-06-19  Rajalakshmi Srinivasaraghavan  <raji@linux.vnet.ibm.com>

	* math/complex.h [__HAVE_DISTINCT_FLOAT128 &&
	!__HAVE_FLOAT128_UNLIKE_LDBL]: 	Redirect long double functions
	to __*ieee128.
---
 math/complex.h | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/math/complex.h b/math/complex.h
index 40cf8e0705..8e917105bc 100644
--- a/math/complex.h
+++ b/math/complex.h
@@ -95,9 +95,11 @@ __BEGIN_DECLS
 
 #define __MATHCALL(function, args)	\
   __MATHDECL (_Mdouble_complex_,function, args)
-#define __MATHDECL(type, function, args) \
+#define __MATHDECL_IMPL(type, function, args) \
   __MATHDECL_1(type, function, args); \
   __MATHDECL_1(type, __CONCAT(__,function), args)
+#define __MATHDECL(type, function, args) \
+  __MATHDECL_IMPL(type, function, args)
 #define __MATHDECL_1_IMPL(type, function, args) \
   extern type __MATH_PRECNAME(function) args __THROW
 #define __MATHDECL_1(type, function, args) \
@@ -124,13 +126,28 @@ __BEGIN_DECLS
 #  undef __MATHDECL_1
 #  define __MATHDECL_1(type, function, args) \
   extern type __REDIRECT_NTH(__MATH_PRECNAME(function), args, function)
+# elif __HAVE_DISTINCT_FLOAT128 && !__HAVE_FLOAT128_UNLIKE_LDBL
+#  undef __MATHDECL_1
+#  undef __MATHDECL
+#  define __REDIR_TO(function) \
+  __ ## function ## ieee128
+#  define __MATHDECL_1(type, function, alias, args) \
+  extern type __REDIRECT_NTH(__MATH_PRECNAME(function), args, alias)
+#define __MATHDECL(type, function, args) \
+  __MATHDECL_1(type, function, __REDIR_TO(function), args); \
+  __MATHDECL_1(type, __CONCAT(__,function), __REDIR_TO(function), args)
 # endif
 
 # define _Mdouble_ 		long double
 # define __MATH_PRECNAME(name)	name##l
 # include <bits/cmathcalls.h>
-# if defined __LDBL_COMPAT
+# if defined __LDBL_COMPAT \
+     || (__HAVE_DISTINCT_FLOAT128 && !__HAVE_FLOAT128_UNLIKE_LDBL)
+#  undef __REDIR_TO
 #  undef __MATHDECL_1
+#  undef __MATHDECL
+#define __MATHDECL(type, function, args) \
+  __MATHDECL_IMPL(type, function, args)
 #  define __MATHDECL_1(type, function, args) \
   __MATHDECL_1_IMPL(type, function, args)
 # endif
-- 
2.14.4