glibc/sysdeps/i386/fpu_control.h
Ulrich Drepper 7e3be507ee update from main archive 961220
Sat Dec 21 04:14:16 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/common/pause.c: Add missing second argument in
	call to __sigpause.
	Reported by a sun <asun@zoology.washington.edu>.

	* locale/weight.h: Correct handling of collation elements.
	Reported by Keld Simonsen <keld@dkuug.dk>.

	* manual/time.texi: Document ^ flag and %P format.

	* new-malloc/malloc.c: Update from Wolfram Gloger.

	* nss/nss.h: Reformat copyright.
	* posix/sched.h: Likewise.
	* sysdeps/i386/fpu_control.h: Likewise.
	* sysdeps/unix/sysv/linux/fcntlbits.h: Likewise.
	* sysdeps/unix/sysv/linux/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/sigcontext.h: Likewise.
	* sysdeps/unix/sysv/linux/utsnamelen.h: Likewise.
	* sysdeps/unix/sysv/linux/sys/acct.h: Likewise.
	* sysvips/sys/msg.h: Likewise.

	* stdio-common/Makefile (routines): Remove fcloseall.
	* stdio-common/fcloseall.c: Removed.

	* stdlib/Makefile (distribute): Add abort-instr.h.
	* sysdeps/generic/abort-instr.h: New file.
	* sysdeps/i386/abort-instr.h: New file.
	* sysdeps/generic/abort.c: Use lock and stage counter to prevent
	any form of loop.

	* sysdeps/unix/sysv/linux/timebits.h: Define CLK_TCK as 100.
	* sysdeps/unix/sysv/linux/alpha/timebits.h: Define CLOCKS_PER_SEC
	as 1000000.  Define CLK_TCK as 1024.
	* time/time.c (CLK_TCK): Define only if not already set.

	* time/strftime.c: Don't use `isdigit' when computing field width
	from string since the locale might have more than one digit
	block.

Fri Dec 20 12:38:14 1996  Darrel Hankerson  <hankedr@mail.auburn.edu>

	* posix/getopt.c (in -W option handling): Return when optind == argc.

Thu Dec 19 14:24:50 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* nis/nss_nis/nis-alias.c (_nss_nis_parse_aliasent): Add const to
	type of KEY.

	* nis/nss_compat/compat-grp.c: Include the declaration of the file
	parser.
	* nis/nss_compat/compat-pwd.c: Likewise.
	* nis/nss_compat/compat-spwd.c: Likewise.
	* nis/nss_nis/nis-ethers.c: Likewise.
	* nis/nss_nis/nis-grp.c: Likewise.
	* nis/nss_nis/nis-network.c: Likewise.
	* nis/nss_nis/nis-proto.c: Likewise.
	* nis/nss_nis/nis-pwd.c: Likewise.
	* nis/nss_nis/nis-rpc.c: Likewise.
	* nis/nss_nis/nis-spwd.c: Likewise.

	* nis/nss_compat/compat-grp.c (getgrent_next_nis,
 	getgrent_next_file): Pass the correct type for the buffer to the
 	parser function.
	* nis/nss_compat/compat-pwd.c (getpwent_next_netgr,
	getpwent_next_nis, getpwent_next_file): Likewise.
	* nis/nss_compat/compat-spwd.c (getspent_next_netgr,
	getspent_next_nis, getspent_next_file): Likewise.
	* nis/nss_nis/nis-ethers.c (internal_nis_getetherent_r,
	_nss_nis_getethernam_r, _nss_nis_getetherbyaddr_r): Likewise.
	* nis/nss_nis/nis-grp.c (internal_nis_getgrent_r,
	_nss_nis_getgrnam_r, _nss_nis_getgrgid_r): Likewise.
	* nis/nss_nis/nis-network.c (internal_nis_getnetent_r,
	_nss_nis_getnetbyname_r, _nss_nis_getnetbyaddr_r): Likewise.
	* nis/nss_nis/nis-proto.c (internal_nis_getprotoent_r,
	_nss_nis_getprotobyname_r, _nss_nis_getprotobynumber_r): Likewise.
	* nis/nss_nis/nis-pwd.c (internal_nis_getpwent_r,
	_nss_nis_getpwnam_r, _nss_nis_getpwuid_r): Likewise.
	* nis/nss_nis/nis-rpc.c (internal_nis_getrpcent_r,
	_nss_nis_getrpcbynumber_r): Likewise.
	* nis/nss_nis/nis-spwd.c (internal_nis_getspent_r,
	_nss_nis_getspnam_r): Likewise.

Thu Dec 19 13:37:16 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/m68k/setjmp.c: New file.
1996-12-21 04:13:58 +00:00

106 lines
3.2 KiB
C

/* FPU control word bits. i387 version.
Copyright (C) 1993, 1995, 1996 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _FPU_CONTROL_H
#define _FPU_CONTROL_H 1
/* Here is the dirty part. Settup 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. I choose 0x1372.
*/
#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
#define _FPU_DOUBLE 0x200 /* fdlibm requires double precision */
#define _FPU_SINGLE 0x0 /* DO NOT USE */
/* 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 0x137f
/* IEEE: same as above, but exceptions */
#define _FPU_IEEE 0x137f
/* 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 at startup. It can be used to manipulate fpu control register. */
extern void __setfpucw __P ((fpu_control_t));
__END_DECLS
#endif /* fpu_control.h */