glibc/sysdeps/generic/setfpucw.c

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/* Set the FPU control word.
Copyright (C) 1996 Free Software Foundation, Inc.
1995-02-18 01:27:10 +00:00
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
Document new files for Linux i386/ELF port. Fri Sep 8 16:32:12 1995 Ulrich Drepper <drepper@gnu.ai.mit.edu> * sysdeps/unix/sysv/linux/Implies, sysdeps/unix/sysv/linux/Makefile, sysdeps/unix/sysv/linux/Subdirs, sysdeps/unix/sysv/linux/accept.S, sysdeps/unix/sysv/linux/adjtime.c, sysdeps/unix/sysv/linux/adjtimex.S, sysdeps/unix/sysv/linux/bind.S, sysdeps/unix/sysv/linux/connect.S, sysdeps/unix/sysv/linux/direct.h, sysdeps/unix/sysv/linux/dl-machine.h, sysdeps/unix/sysv/linux/errnos.h, sysdeps/unix/sysv/linux/fork.S, sysdeps/unix/sysv/linux/gethostid.c, sysdeps/unix/sysv/linux/gethostname.C, sysdeps/unix/sysv/linux/getpeername.S, sysdeps/unix/sysv/linux/getpgid.S, sysdeps/unix/sysv/linux/getpgrp.S, sysdeps/unix/sysv/linux/getsockname.S, sysdeps/unix/sysv/linux/getsockopt.S, sysdeps/unix/sysv/linux/gtty.S, sysdeps/unix/sysv/linux/listen.S, sysdeps/unix/sysv/linux/local_lim.h, sysdeps/unix/sysv/linux/madvise.c, sysdeps/unix/sysv/linux/msgctl.c, sysdeps/unix/sysv/linux/msgget.c, sysdeps/unix/sysv/linux/msgrcv.c, sysdeps/unix/sysv/linux/msgsnd.c, sysdeps/unix/sysv/linux/pipe.S, sysdeps/unix/sysv/linux/poll.c, sysdeps/unix/sysv/linux/readv.c, sysdeps/unix/sysv/linux/recv.S, sysdeps/unix/sysv/linux/recvfrom.S, sysdeps/unix/sysv/linux/recvmsg.S, sysdeps/unix/sysv/linux/semctl.c, sysdeps/unix/sysv/linux/semget.c, sysdeps/unix/sysv/linux/semop.c, sysdeps/unix/sysv/linux/send.S, sysdeps/unix/sysv/linux/sendmsg.S, sysdeps/unix/sysv/linux/sendto.S, sysdeps/unix/sysv/linux/setegid.c, sysdeps/unix/sysv/linux/seteuid.c, sysdeps/unix/sysv/linux/sethostid.c, sysdeps/unix/sysv/linux/setpgid.c, sysdeps/unix/sysv/linux/setpgrp.c, sysdeps/unix/sysv/linux/setsid.S, sysdeps/unix/sysv/linux/setsockopt.S, sysdeps/unix/sysv/linux/settimeofday.S, sysdeps/unix/sysv/linux/shmat.c, sysdeps/unix/sysv/linux/shmctl.c, sysdeps/unix/sysv/linux/shmdt.c, sysdeps/unix/sysv/linux/shmget.c, sysdeps/unix/sysv/linux/shutdown.S, sysdeps/unix/sysv/linux/sigaction.S, sysdeps/unix/sysv/linux/signal.S, sysdeps/unix/sysv/linux/sigpending.S, sysdeps/unix/sysv/linux/sigset.h, sysdeps/unix/sysv/linux/sockaddrcom.h, sysdeps/unix/sysv/linux/socketpair.S, sysdeps/unix/sysv/linux/speed.c, sysdeps/unix/sysv/linux/statbuf.h, sysdeps/unix/sysv/linux/stty.S, sysdeps/unix/sysv/linux/syscall.h, sysdeps/unix/sysv/linux/sysconf.c, sysdeps/unix/sysv/linux/tcdrain.c, sysdeps/unix/sysv/linux/tcflow.c, sysdeps/unix/sysv/linux/tcflush.c, sysdeps/unix/sysv/linux/tcgetattr.c, sysdeps/unix/sysv/linux/tcsetattr.c, sysdeps/unix/sysv/linux/termbits.h, sysdeps/unix/sysv/linux/ualarm.c, sysdeps/unix/sysv/linux/ulimit.c, sysdeps/unix/sysv/linux/usleep.c, sysdeps/unix/sysv/linux/utsnamelen.h, sysdeps/unix/sysv/linux/vfork.c, sysdeps/unix/sysv/linux/wait.c, sysdeps/unix/sysv/linux/wait4.S, sysdeps/unix/sysv/linux/waitpid.c, sysdeps/unix/sysv/linux/writev.c: New Linux/ELF specific, architecture independent files. sysdeps/unix/sysv/linux/i386/Dist, sysdeps/unix/sysv/linux/i386/Makefile, sysdeps/unix/sysv/linux/i386/brk.S, sysdeps/unix/sysv/linux/i386/fcntlbits.h, sysdeps/unix/sysv/linux/i386/fpu_control.c, sysdeps/unix/sysv/linux/i386/fpu_control.h, sysdeps/unix/sysv/linux/i386/fstat.S, sysdeps/unix/sysv/linux/i386/fxstat.S, sysdeps/unix/sysv/linux/i386/ieee_fpu.c, sysdeps/unix/sysv/linux/i386/init-first.S, sysdeps/unix/sysv/linux/i386/ipc.S, sysdeps/unix/sysv/linux/i386/lstat.S, sysdeps/unix/sysv/linux/i386/lxstat.S, sysdeps/unix/sysv/linux/i386/mknod.S, sysdeps/unix/sysv/linux/i386/mmap.S, sysdeps/unix/sysv/linux/i386/sbrk.S, sysdeps/unix/sysv/linux/i386/setfpucw.c, sysdeps/unix/sysv/linux/i386/signum.h, sysdeps/unix/sysv/linux/i386/socket.S, sysdeps/unix/sysv/linux/i386/stat.S, sysdeps/unix/sysv/linux/i386/syscall.S, sysdeps/unix/sysv/linux/i386/sysdep.S, sysdeps/unix/sysv/linux/i386/sysdep.h, sysdeps/unix/sysv/linux/i386/xmknod.S, sysdeps/unix/sysv/linux/i386/xstat.S: New Linux i386/ELF specific files. sysdeps/unix/sysv/linux/sys/ipc_buf.h, sysdeps/unix/sysv/linux/sys/mman.h, sysdeps/unix/sysv/linux/sys/msq_buf.h, sysdeps/unix/sysv/linux/sys/sem_buf.h, sysdeps/unix/sysv/linux/sys/shm_buf.h, sysdeps/unix/sysv/linux/sys/socketcall.h, sysdeps/unix/sysv/linux/sys/timex.h: New Linux/ELF specific, architecture independent header files.
1995-09-08 17:02:25 +00:00
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
1995-02-18 01:27:10 +00:00
#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). */
1996-08-26 10:28:45 +00:00
cw &= _FPU_RESERVED;
cw |= set & ~_FPU_RESERVED;
_FPU_SETCW (cw);
}