Move SNAN_TESTS_PRESERVE_PAYLOAD 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 SNAN_TESTS_PRESERVE_PAYLOAD out to its own sysdeps header.

Tested with build-many-glibcs.py.

	* sysdeps/generic/math-tests-snan-payload.h: New file.
	* sysdeps/hppa/math-tests-snan-payload.h: Likewise.
	* sysdeps/mips/math-tests-snan-payload.h: Likewise.
	* sysdeps/riscv/math-tests-snan-payload.h: Likewise.
	* sysdeps/generic/math-tests.h: Include
	<math-tests-snan-payload.h>.
	(SNAN_TESTS_PRESERVE_PAYLOAD): Do not define macro here.
	* sysdeps/hppa/math-tests.h: Remove file.
	* sysdeps/mips/math-tests.h [!__mips_nan2008]
	(SNAN_TESTS_PRESERVE_PAYLOAD): Do not define macro here.
	* sysdeps/riscv/math-tests.h (SNAN_TESTS_PRESERVE_PAYLOAD):
	Likewise.

2 files changed, 29 insertions, 8 deletions

diff --git a/sysdeps/generic/math-tests-snan-payload.h b/sysdeps/generic/math-tests-snan-payload.h
new file mode 100644
index 0000000000..ae63e6f30d
--- /dev/null
+++ b/sysdeps/generic/math-tests-snan-payload.h
@@ -0,0 +1,28 @@
+/* Configuration for math tests: sNaN payloads.  Generic version.
+   Copyright (C) 2016-2018 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 _MATH_TESTS_SNAN_PAYLOAD_H
+#define _MATH_TESTS_SNAN_PAYLOAD_H 1
+
+/* Indicate whether operations on signaling NaNs preserve the payload
+   (if possible; it is not possible with a zero payload if the high
+   bit is set for signaling NaNs) when generating a quiet NaN, and
+   this should be tested.  */
+#define SNAN_TESTS_PRESERVE_PAYLOAD	1
+
+#endif /* math-tests-snan-payload.h.  */
diff --git a/sysdeps/generic/math-tests.h b/sysdeps/generic/math-tests.h
index 8f5f80635b..a768ab82e0 100644
--- a/sysdeps/generic/math-tests.h
+++ b/sysdeps/generic/math-tests.h
@@ -52,14 +52,6 @@
 /* Return nonzero value if to run tests involving sNaN values for X.  */
 #define SNAN_TESTS(x) MATH_TESTS_TG (SNAN_TESTS_, , x)
 
-/* Indicate whether operations on signaling NaNs preserve the payload
-   (if possible; it is not possible with a zero payload if the high
-   bit is set for signaling NaNs) when generating a quiet NaN, and
-   this should be tested.  */
-#ifndef SNAN_TESTS_PRESERVE_PAYLOAD
-# define SNAN_TESTS_PRESERVE_PAYLOAD	1
-#endif
-
 /* Indicate whether to run tests involving a given rounding mode for a
    given floating-point type, given that fesetround succeeds for that
    mode.  All are run if fesetround succeeds unless overridden.  */
@@ -118,3 +110,4 @@
 #endif
 
 #include <math-tests-snan-cast.h>
+#include <math-tests-snan-payload.h>