Tue Feb 13 05:12:02 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
+ * sysdeps/unix/sysv/linux/Makefile [$(subdir)=math]
+ (sysdep_routines): Append setfpucw.
+ (extra-objs): Append ieee-fpucw.o.
+ (install-lib): Append libieee.a.
+ (libieee.a): New target.
+ * sysdeps/unix/sysv/linux/ieee-fpucw.c: New file.
+ * sysdeps/unix/sysv/linux/i386/fpu_control.h
+ (_FPU_GETCW, _FPU_SETCW): New macros.
+ (fpu_control_t): New typedef.
+ (__setfpucw): Use fpu_control_t for argument type.
+ * sysdeps/unix/sysv/linux/fpu_control.c: Moved from linux/i386.
+
+ * sysdeps/unix/sysv/linux/init-first.c: Moved from linux/i386.
+
* sysdeps/unix/sysv/linux/syscalls.list: Add ipc syscall.
* sysdeps/unix/sysv/linux/i386/syscalls.list: File removed.
+ifeq ($(subdir), math)
+sysdep_routines += setfpucw
+extra-objs += ieee-fpucw.o
+install-lib += libieee.a
+
+$(objpfx)libieee.a: $(objpfx)ieee-fpucw.o
+ rm -f $@
+ ln $< $@
+endif
+
ifeq ($(subdir), io)
sysdep_routines += fxstat lxstat xstat
endif
headers += sys/mount.h
endif
-#ifeq ($(subdir), posix)
-#sysdep_routines := $(sysdep_routines) setpgrp
-#endif
-
ifeq ($(subdir), time)
-sysdep_routines := $(sysdep_routines) adjtimex
+sysdep_routines += adjtimex
headers += sys/timex.h
endif
ifeq ($(subdir), sysvipc)
-sysdep_routines := $(sysdep_routines) ipc
+sysdep_routines += ipc
endif
ifeq ($(subdir), socket)
+++ /dev/null
-ifeq ($(subdir), misc)
-sysdep_routines := $(sysdep_routines) fpu_control setfpucw
-
-extra-libs := $(extra-libs) libieee
-libieee-routines := ieee_fpu
-libieee-inhibit-o := .so .po
-endif
-/* 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.
/* 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
-/* Default control word for ix86 FPU.
-Copyright (C) 1995 Free Software Foundation, Inc.
+/* Set default FPU control word for IEEE operation.
+Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
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. */
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
-unsigned short __fpu_control = 0;
+#include "fpu_control.h"
+
+fpu_control_t __fpu_control = _FPU_IEEE;
-/* Initialization code run first thing by the ELF startup code. i386/Linux
-Copyright (C) 1995 Free Software Foundation, Inc.
+/* Initialization code run first thing by the ELF startup code. Linux version.
+Copyright (C) 1995, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#include <sysdep.h>
#include "fpu_control.h"
+/* This code is mostly the same for all machines. This version works at
+ least for i386 and m68k, and probably any CISCy machine with a normal
+ stack arrangement. */
+
extern void __libc_init (int, char **, char **);
extern void __libc_global_ctors (void);
char **argv = (void *) (data + 1);
char **envp = &argv[argc + 1];
+#ifdef __i386__
/* Make sure we are not using the iBSC2 personality. The `personality'
syscall takes one argument; zero means the Linux personality. The
argument arrives in %ebx; we have to save and restore %ebx by hand
"int $0x80 # syscall no %0\n"
"popl %%ebx"
: : "a" (SYS_ify (personality)));
+#endif
/* Set the FPU control word to the proper default value. */
__setfpucw (__fpu_control);
--- /dev/null
+/* Set the FPU control word.
+Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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. */
+
+#include "fpu_control.h"
+
+void
+__setfpucw (fpu_control_t set)
+{
+ fpu_control_t cw;
+
+ /* Fetch the current control word. */
+ _FPU_GETCW (cw);
+
+ /* Preserve the reserved bits, and set the rest as the user
+ specified (or the default, if the user gave zero). */
+ _FPU_SETCW ((cw & _FPU_RESERVED) | ((set ?: _FPU_DEFAULT) & ~_FPU_RESERVED));
+}
+
+/* The startup code in init-first.c calls __setfpucw (__fpu_control). */
+
+fpu_control_t __fpu_control;
projects / platform / upstream / glibc.git / commitdiff