glibc/sysdeps/i386/fpu/feupdateenv.c
Ulrich Drepper a8c79c4088 [BZ #3427]
2007-03-22  Jakub Jelinek  <jakub@redhat.com>
	[BZ #3427]
	* sysdeps/x86_64/fpu/feholdexcpt.c (feholdexcept): Clear all
	exceptions both in SW and MXCSR.
	* sysdeps/x86_64/fpu/feupdateenv.c: New file.
	* sysdeps/x86_64/fpu/feenablxcpt.c (feenableexcept): Remove dead code.
	* sysdeps/x86_64/fpu/fedisblxcpt.c (fedisableexcept): Likewise.
	* sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions
	in MXCSR if SSE is available.
	* sysdeps/i386/fpu/feupdateenv.c: Include unistd.h, dl-procinfo.h
	and ldsodefs.h.
	(__feupdateenv): Query exceptions also from MXCSR if SSE is available.
	Fix comment typo.
	* sysdeps/ia64/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions.
	Return 0 rather than 1.
	* sysdeps/ia64/fpu/feupdateenv.c (feupdateenv): Fix comment typo.
	Remove incorrect part of a comment.  Fix argument to feraiseexcept.
	* math/test-fenv.c (feholdexcept_tests): New function.
	(main): Call it.

2007-01-05  Richard B. Kreckel  <kreckel@ginac.de>

	[BZ #3427]
	* sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions
	in SW.
2007-04-16 20:15:57 +00:00

61 lines
2.0 KiB
C

/* Install given floating-point environment and raise exceptions.
Copyright (C) 1997,99,2000,01,07 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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.h>
#include <bp-sym.h>
#include <unistd.h>
#include <dl-procinfo.h>
#include <ldsodefs.h>
int
__feupdateenv (const fenv_t *envp)
{
fexcept_t temp;
unsigned int xtemp = 0;
/* Save current exceptions. */
__asm__ ("fnstsw %0" : "=m" (*&temp));
/* If the CPU supports SSE we test the MXCSR as well. */
if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
__asm__ ("stmxcsr %0" : "=m" (*&xtemp));
temp = (temp | xtemp) & FE_ALL_EXCEPT;
/* Install new environment. */
fesetenv (envp);
/* Raise the saved exception. Incidently for us the implementation
defined format of the values in objects of type fexcept_t is the
same as the ones specified using the FE_* constants. */
feraiseexcept ((int) temp);
/* Success. */
return 0;
}
#include <shlib-compat.h>
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
strong_alias (__feupdateenv, __old_feupdateenv)
compat_symbol (libm, BP_SYM (__old_feupdateenv), BP_SYM (feupdateenv), GLIBC_2_1);
#endif
versioned_symbol (libm, BP_SYM (__feupdateenv), BP_SYM (feupdateenv), GLIBC_2_2);