glibc/sysdeps/powerpc/fpu/fedisblxcpt.c
Ulrich Drepper 4a59e9adcb 2007-04-30 Steven Munroe <sjmunroe@us.ibm.com>
Peter Bergner  <bergner@us.ibm.com>

	* sysdeps/powerpc/bits/fenv.h: Declare __fe_mask_env extern.
	Define FE_NOMASK_ENV as FE_EANBLED_ENV.  Define FE_MASK_ENV.
	* sysdeps/powerpc/fpu/Makefile: Add fe_mask to libm-support.
	* sysdeps/powerpc/fpu/fe_mask.c: New file.
	* sysdeps/powerpc/fpu/fe_nomask.c: Correct comment.
	* sysdeps/powerpc/fpu/fedisblxcpt.c (fedisableexcept):
	Call __fe_mask_env() if all FP exceptions disabled.
	* sysdeps/powerpc/fpu/feholdexcpt.c (feholdexcept): Copy high 32-bits
	from old FPSCR to new fenv to propagate DFP rounding modes.
	Call __fe_mask_env() if FP exceptions previously enabled.
	* sysdeps/powerpc/fpu/fesetenv.c (fesetenv): Change mask to merge
	exceptions from env.  Use __fe_nomask_env() or __fe_mask_env() when
	transitioning from all exceptions disabled to any exception enabled
	or visa versa.
	* sysdeps/powerpc/fpu/feupdateenv.c (__feupdateenv): Change mask to
	merge exceptions from env.  Call __fe_nomask_env or __fe_mask_env
	when transitioning from all exceptions disabled to any exception
	enabled or visa versa.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fe_nomask.c: Moved to...
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_nomask.c: ...here.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c: Moved to...
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_nomask.c: ...here.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_mask.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_mask.c: New file.
2007-05-07 06:22:38 +00:00

55 lines
1.7 KiB
C

/* Disable floating-point exceptions.
Copyright (C) 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Geoffrey Keating <geoffk@geoffk.org>, 2000.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <fenv_libc.h>
int
fedisableexcept (int excepts)
{
fenv_union_t fe;
int result, new;
result = fegetexcept ();
if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
fe.fenv = fegetenv_register ();
if (excepts & FE_INEXACT)
fe.l[1] &= ~(1 << (31 - FPSCR_XE));
if (excepts & FE_DIVBYZERO)
fe.l[1] &= ~(1 << (31 - FPSCR_ZE));
if (excepts & FE_UNDERFLOW)
fe.l[1] &= ~(1 << (31 - FPSCR_UE));
if (excepts & FE_OVERFLOW)
fe.l[1] &= ~(1 << (31 - FPSCR_OE));
if (excepts & FE_INVALID)
fe.l[1] &= ~(1 << (31 - FPSCR_VE));
fesetenv_register (fe.fenv);
new = fegetexcept ();
if (new == 0 && result != 0)
(void)__fe_mask_env ();
if ((new & excepts) != 0)
result = -1;
return result;
}