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| author | Roland McGrath <roland@gnu.org> | 1996-02-13 11:07:05 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1996-02-13 11:07:05 +0000 |
| commit | 2a072de4a1b78ae6e7cfe7d6be4cd837f3cafaf5 (patch) | |
| tree | 068c2612fa620e39dc67496386861e385f1643a8 /sysdeps/unix/sysv/linux/i386/fpu_control.h | |
| parent | 363113d02a48598cf903c5b5409f71fe2a16ba13 (diff) | |
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Tue Feb 13 05:12:02 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
* 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.
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/fpu_control.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/fpu_control.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/fpu_control.h b/sysdeps/unix/sysv/linux/i386/fpu_control.h index 8cf4292643..56f42cd8e6 100644 --- a/sysdeps/unix/sysv/linux/i386/fpu_control.h +++ b/sysdeps/unix/sysv/linux/i386/fpu_control.h @@ -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 |