mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 20:51:11 +00:00
76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/* Install given floating-point environment.
|
|
Copyright (C) 1997-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
|
|
|
|
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>
|
|
|
|
int
|
|
__fesetenv (const fenv_t *envp)
|
|
{
|
|
fenv_t temp;
|
|
|
|
/* Install the environment specified by ENVP. But there are a few
|
|
values which we do not want to come from the saved environment.
|
|
Therefore, we get the current environment and replace the values
|
|
we want to use from the environment specified by the parameter. */
|
|
#ifdef __mcoldfire__
|
|
__asm__ ("fmove%.l %/fpcr,%0" : "=dm" (temp.__control_register));
|
|
__asm__ ("fmove%.l %/fpsr,%0" : "=dm" (temp.__status_register));
|
|
__asm__ ("fmove%.l %/fpiar,%0" : "=dm" (temp.__instruction_address));
|
|
#else
|
|
__asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*&temp));
|
|
#endif
|
|
|
|
temp.__status_register &= ~FE_ALL_EXCEPT;
|
|
temp.__control_register &= ~((FE_ALL_EXCEPT << 6) | FE_UPWARD);
|
|
if (envp == FE_DFL_ENV)
|
|
;
|
|
else if (envp == FE_NOMASK_ENV)
|
|
temp.__control_register |= FE_ALL_EXCEPT << 6;
|
|
else
|
|
{
|
|
temp.__control_register |= (envp->__control_register
|
|
& ((FE_ALL_EXCEPT << 6) | FE_UPWARD));
|
|
temp.__status_register |= envp->__status_register & FE_ALL_EXCEPT;
|
|
}
|
|
|
|
#ifdef __mcoldfire__
|
|
__asm__ __volatile__ ("fmove%.l %0,%/fpiar"
|
|
:: "dm" (temp.__instruction_address));
|
|
__asm__ __volatile__ ("fmove%.l %0,%/fpcr"
|
|
:: "dm" (temp.__control_register));
|
|
__asm__ __volatile__ ("fmove%.l %0,%/fpsr"
|
|
:: "dm" (temp.__status_register));
|
|
#else
|
|
__asm__ __volatile__ ("fmovem%.l %0,%/fpcr/%/fpsr/%/fpiar" : : "m" (*&temp));
|
|
#endif
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
|
|
#include <shlib-compat.h>
|
|
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
|
|
strong_alias (__fesetenv, __old_fesetenv)
|
|
compat_symbol (libm, __old_fesetenv, fesetenv, GLIBC_2_1);
|
|
#endif
|
|
|
|
libm_hidden_def (__fesetenv)
|
|
libm_hidden_ver (__fesetenv, fesetenv)
|
|
versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);
|