Move ROUNDING_TESTS_* out of math-tests.h.

Continuing moving macros out of math-tests.h to smaller headers
following typo-proof conventions instead of using #ifndef, this patch
moves the ROUNDING_TESTS_* macros for individual types out to their
own sysdeps header.

In the soft-float case where FE_TONEAREST is the only rounding mode
macro defined, there is no need to define ROUNDING_TESTS_*; it is only
necessary when rounding modes macros are defined that may not be
supported at runtime.  Thus, the ROUNDING_TESTS_* definitions for some
configurations are just removed, not moved to new
math-tests-rounding.h headers; the only architectures needing
math-tests-rounding.h are those where the macros are defined in
bits/fenv.h because of the possibility of a soft-float compilation
using a hard-float glibc with the same ABI (i.e., ARM and RISC-V).

The test-*-vlen*.h headers, by using #undef, do not yet follow
typo-proof conventions (but they no longer implicitly rely on being
included before math-tests.h, and this area can always be cleaned up
further in future).

Tested with build-many-glibcs.py.

	* sysdeps/generic/math-tests-rounding.h: New file.
	* sysdeps/generic/math-tests.h: Include <math-tests-rounding.h>.
	(ROUNDING_TESTS_float): Do not define here.
	(ROUNDING_TESTS_double): Likewise.
	(ROUNDING_TESTS_long_double): Likewise.
	(ROUNDING_TESTS_float128): Likewise.
	* math/test-double-vlen2.h: Include <math-tests-rounding.h>.
	(ROUNDING_TESTS_double): Undefine before defining.
	* math/test-double-vlen4.h: Include <math-tests-rounding.h>.
	(ROUNDING_TESTS_double): Undefine before defining.
	* math/test-double-vlen8.h: Include <math-tests-rounding.h>.
	(ROUNDING_TESTS_double): Undefine before defining.
	* math/test-float-vlen16.h: Include <math-tests-rounding.h>.
	(ROUNDING_TESTS_float): Undefine before defining.
	* math/test-float-vlen4.h: Include <math-tests-rounding.h>.
	(ROUNDING_TESTS_float): Undefine before defining.
	* math/test-float-vlen8.h: Include <math-tests-rounding.h>.
	(ROUNDING_TESTS_float): Undefine before defining.
	* sysdeps/arm/nofpu/math-tests-rounding.h: New file.
	* sysdeps/arm/math-tests.h [__SOFTFP__] (ROUNDING_TESTS_float): Do
	not define here.
	[__SOFTFP__] (ROUNDING_TESTS_double): Likewise.
	[__SOFTFP__] (ROUNDING_TESTS_long_double): Likewise.
	* sysdeps/riscv/nofpu/math-tests-rounding.h: New file.
	* sysdeps/riscv/math-tests.h [!__riscv_flen]
	(ROUNDING_TESTS_float): Do not define here.
	[!__riscv_flen] (ROUNDING_TESTS_double): Likewise.
	[!__risv_flen] (ROUNDING_TESTS_long_double): Likewise.
	* sysdeps/m68k/coldfire/math-tests.h [!__mcffpu__]
	(ROUNDING_TESTS_float): Likewise.
	[!__mcffpu__] (ROUNDING_TESTS_double): Likewise.
	[!__mcffpu__] (ROUNDING_TESTS_long_double): Likewise.
	* sysdeps/mips/math-tests.h [__mips_soft_float]
	(ROUNDING_TESTS_float): Likewise.
	[__mips_soft_float] (ROUNDING_TESTS_double): Likewise.
	[__mips_soft_float] (ROUNDING_TESTS_long_double): Likewise.
	* sysdeps/nios2/math-tests.h (ROUNDING_TESTS_float): Likewise.
	(ROUNDING_TESTS_double): Likewise.
	(ROUNDING_TESTS_long_double): Likewise.

2 files changed, 29 insertions, 3 deletions

diff --git a/sysdeps/arm/math-tests.h b/sysdeps/arm/math-tests.h
index d4d68f39c9..9a34902b6a 100644
--- a/sysdeps/arm/math-tests.h
+++ b/sysdeps/arm/math-tests.h
@@ -21,9 +21,6 @@
    support rounding modes, although fesetround succeeds, and do not
    support exceptions.  */
 #ifdef __SOFTFP__
-# define ROUNDING_TESTS_float(MODE)	((MODE) == FE_TONEAREST)
-# define ROUNDING_TESTS_double(MODE)	((MODE) == FE_TONEAREST)
-# define ROUNDING_TESTS_long_double(MODE)	((MODE) == FE_TONEAREST)
 # define EXCEPTION_TESTS_float	0
 # define EXCEPTION_TESTS_double	0
 # define EXCEPTION_TESTS_long_double	0
diff --git a/sysdeps/arm/nofpu/math-tests-rounding.h b/sysdeps/arm/nofpu/math-tests-rounding.h
new file mode 100644
index 0000000000..9a3b58c080
--- /dev/null
+++ b/sysdeps/arm/nofpu/math-tests-rounding.h
@@ -0,0 +1,29 @@
+/* Configuration for math tests: rounding mode support.  ARM no-FPU version.
+   Copyright (C) 2013-2018 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/>.  */
+
+#ifndef ARM_NOFPU_MATH_TESTS_ROUNDING_H
+#define ARM_NOFPU_MATH_TESTS_ROUNDING_H 1
+
+/* On systems with VFP support, but where glibc is built for
+   soft-float, the libgcc functions used in libc and libm do not
+   support rounding modes, although fesetround succeeds.  */
+#define ROUNDING_TESTS_float(MODE)	((MODE) == FE_TONEAREST)
+#define ROUNDING_TESTS_double(MODE)	((MODE) == FE_TONEAREST)
+#define ROUNDING_TESTS_long_double(MODE)	((MODE) == FE_TONEAREST)
+
+#endif /* math-tests-rounding.h.  */