Support testing _Float64x libm functions [committed]

[Joseph Myers <joseph at codesourcery dot com>]

This patch adds support for testing _Float64x libm functions.  A
configuration with such functions sets float64x-alias-fcts = yes in a
sysdeps Makeconfig file; until such settings are added, this test
support is inactive.

Tested for x86_64, including in conjunction with _Float64x support
patches.  Committed.

2017-11-24  Joseph Myers  <joseph@codesourcery.com>

	* math/test-float64x.h: New file.
	* math/Makefile (type-float64x-yes): New variable.
	(test-types): Add $(type-float64x-$(float64x-alias-fcts)).

diff --git a/math/Makefile b/math/Makefile
index b2bd3d3..668c283 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -126,9 +126,14 @@ type-float-routines := k_rem_pio2f math_errf e_exp2f_data e_logf_data	\
 type-float128-suffix := f128
 type-float128-routines := t_sincosf128 k_sincosf128
 type-float128-yes := float128
+
+# _Float64x may be supported, only as an alias type.
+type-float64x-yes := float64x
+
 types = $(types-basic) $(type-float128-$(float128-fcts))
 test-types = $(test-types-basic) $(type-float128-$(float128-fcts)) \
-	     $(type-float128-$(float128-alias-fcts))
+	     $(type-float128-$(float128-alias-fcts)) \
+	     $(type-float64x-$(float64x-alias-fcts))
 
 # For each of the basic types (float, double, long double), replace the
 # occurrences of 'F' in arg 1 with the appropriate suffix for the type.
diff --git a/math/test-float64x.h b/math/test-float64x.h
new file mode 100644
index 0000000..4ff72ac
--- /dev/null
+++ b/math/test-float64x.h
@@ -0,0 +1,43 @@
+/* Common definitions for libm tests for _Float64x.
+
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "test-math-floatn.h"
+
+/* Fixup builtins and constants for older compilers.  */
+#include <bits/floatn.h>
+#include <float.h>
+
+#define FUNC(function) function ## f64x
+#define FLOAT _Float64x
+#define CFLOAT __CFLOAT64X
+#define BUILD_COMPLEX(real, imag) (CMPLXF64X ((real), (imag)))
+#define PREFIX FLT64X
+#if FLT64X_MANT_DIG == LDBL_MANT_DIG
+# define TYPE_STR "ldouble"
+# define ULP_IDX ULP_LDBL
+# define ULP_I_IDX ULP_I_LDBL
+#else
+# define TYPE_STR "float128"
+# define ULP_IDX ULP_FLT128
+# define ULP_I_IDX ULP_I_FLT128
+#endif
+#define LIT(x) __f64x (x)
+#define LITM(x) x ## f64x
+#define FTOSTR strfromf64x
+#define snan_value_MACRO SNANF64X

-- 
Joseph S. Myers
joseph@codesourcery.com