Remove ancient __signbit inlines

Remove __signbit inlines from mathinline.h.  Math.h already uses
the builtin when supported, so additional inlines are only used
on pre 4.0 GCCs.  Similarly remove ancient copysign and fabs
inlines.

	* sysdeps/alpha/fpu/bits/mathinline.h: Delete file.
	* sysdeps/ia64/fpu/bits/mathinline.h: Delete file.
	* sysdeps/m68k/coldfire/fpu/bits/mathinline.h: Delete file.
	* sysdeps/m68k/m680x0/fpu/bits/mathinline.h: (__signbitf): Remove.
	(__signbit): Remove.
	(__signbitl): Remove.
	* sysdeps/powerpc/bits/mathinline.h (__signbitf): Remove.
	(__signbit): Remove.
	(__signbitl): Remove.
	* sysdeps/s390/fpu/bits/mathinline.h: (__signbitf): Remove.
	(__signbit): Remove.
	(__signbitl): Remove
	* sysdeps/sparc/fpu/bits/mathinline.h (__signbitf): Remove.
	(__signbit): Remove.
	(__signbitl): Remove.
	* sysdeps/tile/bits/mathinline.h: Delete file.
	* sysdeps/x86/fpu/bits/mathinline.h (__signbitf): Remove.
	(__signbit): Remove.
	(__signbitl): Remove.

2 files changed, 0 insertions, 68 deletions

diff --git a/sysdeps/m68k/coldfire/fpu/bits/mathinline.h b/sysdeps/m68k/coldfire/fpu/bits/mathinline.h
deleted file mode 100644
index 7dbfe37ee1..0000000000
--- a/sysdeps/m68k/coldfire/fpu/bits/mathinline.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/* Inline math functions for Coldfire.
-   Copyright (C) 2012-2017 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/>.  */
-
-#ifndef _MATH_H
-# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
-#endif
-
-#ifndef __extern_always_inline
-# define __MATH_INLINE __inline
-#else
-# define __MATH_INLINE __extern_always_inline
-#endif
-
-#if defined __USE_ISOC99 && defined __GNUC__
-
-/* Test for negative number.  Used in the signbit macro.  */
-__MATH_INLINE int
-__NTH (__signbitf (float __x))
-{
-  return __builtin_signbitf (__x);
-}
-
-__MATH_INLINE int
-__NTH (__signbit (double __x))
-{
-  return __builtin_signbit (__x);
-}
-
-#endif
diff --git a/sysdeps/m68k/m680x0/fpu/bits/mathinline.h b/sysdeps/m68k/m680x0/fpu/bits/mathinline.h
index 07ba1454b9..dcc2a4e829 100644
--- a/sysdeps/m68k/m680x0/fpu/bits/mathinline.h
+++ b/sysdeps/m68k/m680x0/fpu/bits/mathinline.h
@@ -28,30 +28,6 @@
 
 #ifdef	__GNUC__
 
-#ifdef __USE_ISOC99
-
-/* Test for negative number.  Used in the signbit() macro.  */
-__MATH_INLINE int
-__NTH (__signbitf (float __x))
-{
-  __extension__ union { float __f; int __i; } __u = { __f: __x };
-  return __u.__i < 0;
-}
-__MATH_INLINE int
-__NTH (__signbit (double __x))
-{
-  __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
-  return __u.__i[0] < 0;
-}
-__MATH_INLINE int
-__NTH (__signbitl (long double __x))
-{
-  __extension__ union { long double __d; int __i[3]; } __u = { __d: __x };
-  return __u.__i[0] < 0;
-}
-#endif
-
-
 #if (!defined __NO_MATH_INLINES && defined __OPTIMIZE__) \
     || defined __LIBC_INTERNAL_MATH_INLINES