mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/* Install given floating-point environment.
|
|
Copyright (C) 2004-2013 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 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv.h>
|
|
#include <fpu_control.h>
|
|
#include <arm-features.h>
|
|
|
|
|
|
int
|
|
__fesetenv (const fenv_t *envp)
|
|
{
|
|
if (ARM_HAVE_VFP)
|
|
{
|
|
unsigned int temp;
|
|
|
|
_FPU_GETCW (temp);
|
|
temp &= _FPU_RESERVED;
|
|
|
|
if (envp == FE_DFL_ENV)
|
|
temp |= _FPU_DEFAULT;
|
|
else if (envp == FE_NOMASK_ENV)
|
|
temp |= _FPU_IEEE;
|
|
else
|
|
temp |= envp->__cw & ~_FPU_RESERVED;
|
|
|
|
_FPU_SETCW (temp);
|
|
|
|
if (envp == FE_NOMASK_ENV)
|
|
{
|
|
/* VFPv3 and VFPv4 do not support trapping exceptions, so
|
|
test whether the relevant bits were set and fail if
|
|
not. */
|
|
_FPU_GETCW (temp);
|
|
if ((temp & _FPU_IEEE) != _FPU_IEEE)
|
|
return 1;
|
|
}
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
|
|
/* Unsupported, so fail. */
|
|
return 1;
|
|
}
|
|
|
|
#include <shlib-compat.h>
|
|
libm_hidden_ver (__fesetenv, fesetenv)
|
|
versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);
|