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Tue Feb 13 05:12:02 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>

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* sysdeps/unix/sysv/linux/Makefile [$(subdir)=math]
	(sysdep_routines): Append setfpucw.
	(extra-objs): Append ieee-fpucw.o.
	(install-lib): Append libieee.a.
	(libieee.a): New target.
	* sysdeps/unix/sysv/linux/ieee-fpucw.c: New file.
	* sysdeps/unix/sysv/linux/i386/fpu_control.h
	(_FPU_GETCW, _FPU_SETCW): New macros.
	(fpu_control_t): New typedef.
	(__setfpucw): Use fpu_control_t for argument type.
	* sysdeps/unix/sysv/linux/fpu_control.c: Moved from linux/i386.

	* sysdeps/unix/sysv/linux/init-first.c: Moved from linux/i386.
	* sysdeps/unix/sysv/linux/Makefile [$(subdir)=math]
	(sysdep_routines): Append setfpucw.
	(extra-objs): Append ieee-fpucw.o.
	(install-lib): Append libieee.a.
	(libieee.a): New target.
	* sysdeps/unix/sysv/linux/ieee-fpucw.c: New file.
	* sysdeps/unix/sysv/linux/i386/fpu_control.h
	(_FPU_GETCW, _FPU_SETCW): New macros.
	(fpu_control_t): New typedef.
	(__setfpucw): Use fpu_control_t for argument type.
	* sysdeps/unix/sysv/linux/fpu_control.c: Moved from linux/i386.

	* sysdeps/unix/sysv/linux/init-first.c: Moved from linux/i386.
This commit is contained in:
Roland McGrath
1996-02-13 11:07:05 +00:00
parent 363113d02a
commit 2a072de4a1
7 changed files with 90 additions and 25 deletions
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17
sysdeps/unix/sysv/linux/i386/fpu_control.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1993, 1995 Free Software Foundation, Inc.
/* Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Olaf Flebbe.
@ -87,13 +87,20 @@ Boston, MA 02111-1307, USA. */
/* IEEE: same as above, but exceptions */
#define _FPU_IEEE 0x137f
/* private namespace. It should only be used in init-first.o. */
extern unsigned short __fpu_control;
/* Type of the control word. */
typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
/* Macros for accessing the hardware control word. */
#define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (cw))
#define _FPU_SETCW(cw) __asm__ ("fldcw %0" : "m" (cw))
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
__BEGIN_DECLS
/* called in init-first.o. It can be used to manipulate 387 control word. */
extern void __setfpucw __P ((unsigned short));
/* Called at startup. It can be used to manipulate fpu control register. */
extern void __setfpucw __P ((fpu_control_t));
__END_DECLS