PATCH: Use x86-64 fpu_control.h for i386 and x86_64

["H.J. Lu" <hongjiu dot lu at intel dot com>]

Hi,

Now x86-64 fpu_control.h is the same as i386 one, plus the update comments.
This patch uses x86-64 fpu_control.h for i386 and x86_64.  OK to install?

Thanks.


H.J.
---
	[BZ #14117]
	* sysdeps/i386/fpu_control.h: Removed.
	* sysdeps/x86_64/fpu_control.h: Moved to ...
	* sysdeps/x86/fpu_control.h: Here.

diff --git a/sysdeps/i386/fpu_control.h b/sysdeps/i386/fpu_control.h
deleted file mode 100644
index dd6be27..0000000
--- a/sysdeps/i386/fpu_control.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/* FPU control word bits.  i387 version.
-   Copyright (C) 1993,1995-1998,2000,2001,2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Olaf Flebbe.
-
-   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 _FPU_CONTROL_H
-#define _FPU_CONTROL_H	1
-
-/* Here is the dirty part. Set up your 387 through the control word
- * (cw) register.
- *
- *     15-13    12  11-10  9-8     7-6     5    4    3    2    1    0
- * | reserved | IC | RC  | PC | reserved | PM | UM | OM | ZM | DM | IM
- *
- * IM: Invalid operation mask
- * DM: Denormalized operand mask
- * ZM: Zero-divide mask
- * OM: Overflow mask
- * UM: Underflow mask
- * PM: Precision (inexact result) mask
- *
- * Mask bit is 1 means no interrupt.
- *
- * PC: Precision control
- * 11 - round to extended precision
- * 10 - round to double precision
- * 00 - round to single precision
- *
- * RC: Rounding control
- * 00 - rounding to nearest
- * 01 - rounding down (toward - infinity)
- * 10 - rounding up (toward + infinity)
- * 11 - rounding toward zero
- *
- * IC: Infinity control
- * That is for 8087 and 80287 only.
- *
- * The hardware default is 0x037f which we use.
- */
-
-#include <features.h>
-
-/* masking of interrupts */
-#define _FPU_MASK_IM  0x01
-#define _FPU_MASK_DM  0x02
-#define _FPU_MASK_ZM  0x04
-#define _FPU_MASK_OM  0x08
-#define _FPU_MASK_UM  0x10
-#define _FPU_MASK_PM  0x20
-
-/* precision control */
-#define _FPU_EXTENDED 0x300	/* libm requires double extended precision.  */
-#define _FPU_DOUBLE   0x200
-#define _FPU_SINGLE   0x0
-
-/* rounding control */
-#define _FPU_RC_NEAREST 0x0    /* RECOMMENDED */
-#define _FPU_RC_DOWN    0x400
-#define _FPU_RC_UP      0x800
-#define _FPU_RC_ZERO    0xC00
-
-#define _FPU_RESERVED 0xF0C0  /* Reserved bits in cw */
-
-
-/* The fdlibm code requires strict IEEE double precision arithmetic,
-   and no interrupts for exceptions, rounding to nearest.  */
-
-#define _FPU_DEFAULT  0x037f
-
-/* IEEE:  same as above.  */
-#define _FPU_IEEE     0x037f
-
-/* Type of the control word.  */
-typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
-
-/* Macros for accessing the hardware control word.
-
-   Note that the use of these macros is no sufficient anymore with
-   recent hardware.  Some floating point operations are executed in
-   the SSE/SSE2 engines which have their own control and status register.  */
-#define _FPU_GETCW(cw) __asm__ __volatile__ ("fnstcw %0" : "=m" (*&cw))
-#define _FPU_SETCW(cw) __asm__ __volatile__ ("fldcw %0" : : "m" (*&cw))
-
-/* Default control word set at startup.  */
-extern fpu_control_t __fpu_control;
-
-#endif	/* fpu_control.h */
diff --git a/sysdeps/x86_64/fpu_control.h b/sysdeps/x86/fpu_control.h
similarity index 100%
rename from sysdeps/x86_64/fpu_control.h
rename to sysdeps/x86/fpu_control.h