55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
|
/* Install given floating-point environment and raise exceptions.
|
||
|
|
Copyright (C) 1997-2022 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
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include <fenv_libc.h>
|
||
|
|
#include <fpu_control.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
__feupdateenv (const fenv_t *envp)
|
||
|
|
{
|
||
|
|
fenv_union_t old, new;
|
||
|
|
|
||
|
|
/* Save the currently set exceptions. */
|
||
|
|
new.fenv = *envp;
|
||
|
|
old.fenv = fegetenv_register ();
|
||
|
|
|
||
|
|
/* Restore rounding mode and exception enable from *envp and merge
|
||
|
|
exceptions. Leave fraction rounded/inexact and FP result/CC bits
|
||
|
|
unchanged. */
|
||
|
|
new.l = (old.l & 0xffffffff1fffff00LL) | (new.l & 0x1ff80fff);
|
||
|
|
|
||
|
|
__TEST_AND_EXIT_NON_STOP (old.l, new.l);
|
||
|
|
__TEST_AND_ENTER_NON_STOP (old.l, new.l);
|
||
|
|
|
||
|
|
/* Atomically enable and raise (if appropriate) exceptions set in `new'. */
|
||
|
|
fesetenv_register (new.fenv);
|
||
|
|
|
||
|
|
/* 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, __old_feupdateenv, feupdateenv, GLIBC_2_1);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
libm_hidden_def (__feupdateenv)
|
||
|
|
libm_hidden_ver (__feupdateenv, feupdateenv)
|
||
|
|
versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2);
|