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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.
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ChangeLog
14
ChangeLog
@ -1,5 +1,19 @@
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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 [$(subdir)=math]
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(sysdep_routines): Append setfpucw.
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(extra-objs): Append ieee-fpucw.o.
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(install-lib): Append libieee.a.
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(libieee.a): New target.
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* sysdeps/unix/sysv/linux/ieee-fpucw.c: New file.
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* sysdeps/unix/sysv/linux/i386/fpu_control.h
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(_FPU_GETCW, _FPU_SETCW): New macros.
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(fpu_control_t): New typedef.
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(__setfpucw): Use fpu_control_t for argument type.
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* sysdeps/unix/sysv/linux/fpu_control.c: Moved from linux/i386.
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* sysdeps/unix/sysv/linux/init-first.c: Moved from linux/i386.
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* sysdeps/unix/sysv/linux/syscalls.list: Add ipc syscall.
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* sysdeps/unix/sysv/linux/i386/syscalls.list: File removed.
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@ -1,3 +1,13 @@
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ifeq ($(subdir), math)
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sysdep_routines += setfpucw
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extra-objs += ieee-fpucw.o
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install-lib += libieee.a
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$(objpfx)libieee.a: $(objpfx)ieee-fpucw.o
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rm -f $@
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ln $< $@
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endif
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ifeq ($(subdir), io)
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sysdep_routines += fxstat lxstat xstat
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endif
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@ -7,17 +17,13 @@ sysdep_routines += xmknod mount umount s_ptrace
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headers += sys/mount.h
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endif
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#ifeq ($(subdir), posix)
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#sysdep_routines := $(sysdep_routines) setpgrp
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#endif
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ifeq ($(subdir), time)
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sysdep_routines := $(sysdep_routines) adjtimex
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sysdep_routines += adjtimex
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headers += sys/timex.h
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endif
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ifeq ($(subdir), sysvipc)
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sysdep_routines := $(sysdep_routines) ipc
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sysdep_routines += ipc
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endif
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ifeq ($(subdir), socket)
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@ -1,7 +0,0 @@
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ifeq ($(subdir), misc)
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sysdep_routines := $(sysdep_routines) fpu_control setfpucw
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extra-libs := $(extra-libs) libieee
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libieee-routines := ieee_fpu
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libieee-inhibit-o := .so .po
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endif
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993, 1995 Free Software Foundation, Inc.
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/* Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Olaf Flebbe.
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@ -87,13 +87,20 @@ Boston, MA 02111-1307, USA. */
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/* IEEE: same as above, but exceptions */
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#define _FPU_IEEE 0x137f
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/* private namespace. It should only be used in init-first.o. */
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extern unsigned short __fpu_control;
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/* Type of the control word. */
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typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
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/* Macros for accessing the hardware control word. */
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#define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (cw))
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#define _FPU_SETCW(cw) __asm__ ("fldcw %0" : "m" (cw))
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/* Default control word set at startup. */
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extern fpu_control_t __fpu_control;
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__BEGIN_DECLS
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/* called in init-first.o. It can be used to manipulate 387 control word. */
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extern void __setfpucw __P ((unsigned short));
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/* Called at startup. It can be used to manipulate fpu control register. */
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extern void __setfpucw __P ((fpu_control_t));
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__END_DECLS
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@ -1,5 +1,5 @@
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/* Default control word for ix86 FPU.
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Copyright (C) 1995 Free Software Foundation, Inc.
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/* Set default FPU control word for IEEE operation.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -14,7 +14,9 @@ Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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unsigned short __fpu_control = 0;
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#include "fpu_control.h"
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fpu_control_t __fpu_control = _FPU_IEEE;
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@ -1,5 +1,5 @@
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/* Initialization code run first thing by the ELF startup code. i386/Linux
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Copyright (C) 1995 Free Software Foundation, Inc.
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/* Initialization code run first thing by the ELF startup code. Linux version.
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Copyright (C) 1995, 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -21,6 +21,10 @@ Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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#include "fpu_control.h"
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/* This code is mostly the same for all machines. This version works at
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least for i386 and m68k, and probably any CISCy machine with a normal
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stack arrangement. */
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extern void __libc_init (int, char **, char **);
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extern void __libc_global_ctors (void);
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@ -32,6 +36,7 @@ init (int *data)
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char **argv = (void *) (data + 1);
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char **envp = &argv[argc + 1];
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#ifdef __i386__
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/* Make sure we are not using the iBSC2 personality. The `personality'
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syscall takes one argument; zero means the Linux personality. The
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argument arrives in %ebx; we have to save and restore %ebx by hand
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@ -42,6 +47,7 @@ init (int *data)
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"int $0x80 # syscall no %0\n"
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"popl %%ebx"
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: : "a" (SYS_ify (personality)));
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#endif
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/* Set the FPU control word to the proper default value. */
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__setfpucw (__fpu_control);
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sysdeps/unix/sysv/linux/setfpucw.c
Normal file
37
sysdeps/unix/sysv/linux/setfpucw.c
Normal file
@ -0,0 +1,37 @@
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/* Set the FPU control word.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "fpu_control.h"
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void
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__setfpucw (fpu_control_t set)
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{
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fpu_control_t cw;
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/* Fetch the current control word. */
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_FPU_GETCW (cw);
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/* Preserve the reserved bits, and set the rest as the user
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specified (or the default, if the user gave zero). */
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_FPU_SETCW ((cw & _FPU_RESERVED) | ((set ?: _FPU_DEFAULT) & ~_FPU_RESERVED));
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}
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/* The startup code in init-first.c calls __setfpucw (__fpu_control). */
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fpu_control_t __fpu_control;
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