2004-10-23 00:33:35 +00:00
|
|
|
/* Install given floating-point environment.
|
|
|
|
|
Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc.
|
|
|
|
|
This file is part of the GNU C Library.
|
|
|
|
|
Contributed by Alexandre Oliva <aoliva@redhat.com>
|
|
|
|
|
based on corresponding file in the MIPS port.
|
|
|
|
|
|
|
|
|
|
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
|
2012-03-09 23:56:38 +00:00
|
|
|
License along with the GNU C Library. If not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
2004-10-23 00:33:35 +00:00
|
|
|
|
|
|
|
|
#include <fenv.h>
|
|
|
|
|
#include <fpu_control.h>
|
|
|
|
|
#include <shlib-compat.h>
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
__fesetenv (const fenv_t *envp)
|
|
|
|
|
{
|
|
|
|
|
fpu_control_t cw;
|
|
|
|
|
|
|
|
|
|
/* We want to clear all EF bits for the default end IEEE. */
|
|
|
|
|
|
|
|
|
|
if (envp == FE_DFL_ENV)
|
|
|
|
|
_FPU_SETFCW (_FPU_DEFAULT|FE_ALL_EXCEPT);
|
|
|
|
|
else if (envp == FE_NOMASK_ENV)
|
|
|
|
|
_FPU_SETFCW (_FPU_IEEE|FE_ALL_EXCEPT);
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
fpu_control_t temp;
|
|
|
|
|
|
|
|
|
|
_FPU_GETCW (temp);
|
|
|
|
|
cw = *envp;
|
|
|
|
|
|
|
|
|
|
/* If EF bits are cleared and the user requests them to be set,
|
|
|
|
|
we have to fail, because there's no way to do it. */
|
|
|
|
|
if (~temp & cw & FE_ALL_EXCEPT)
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
/* We clear EF bits by storing a 1 in them, so flip the
|
|
|
|
|
FE_ALL_EXCEPT bits. */
|
|
|
|
|
cw = (cw & ~FE_ALL_EXCEPT) | (~cw & FE_ALL_EXCEPT);
|
|
|
|
|
_FPU_SETFCW (cw);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Success. */
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
libm_hidden_ver (__fesetenv, fesetenv)
|
|
|
|
|
versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);
|
