1/* Install given floating-point environment.
2   Copyright (C) 1997,99,2000,01 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4   Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
5
6   The GNU C Library is free software; you can redistribute it and/or
7   modify it under the terms of the GNU Lesser General Public
8   License as published by the Free Software Foundation; either
9   version 2.1 of the License, or (at your option) any later version.
10
11   The GNU C Library is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   Lesser General Public License for more details.
15
16   You should have received a copy of the GNU Lesser General Public
17   License along with the GNU C Library; if not, write to the Free
18   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19   02111-1307 USA.  */
20
21#include <fenv.h>
22
23int
24__fesetenv (const fenv_t *envp)
25{
26  fenv_t temp;
27
28  /* Install the environment specified by ENVP.  But there are a few
29     values which we do not want to come from the saved environment.
30     Therefore, we get the current environment and replace the values
31     we want to use from the environment specified by the parameter.  */
32  __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*&temp));
33
34  temp.__status_register &= ~FE_ALL_EXCEPT;
35  temp.__control_register &= ~((FE_ALL_EXCEPT << 6) | FE_UPWARD);
36  if (envp == FE_DFL_ENV)
37    ;
38  else if (envp == FE_NOMASK_ENV)
39    temp.__control_register |= FE_ALL_EXCEPT << 6;
40  else
41    {
42      temp.__control_register |= (envp->__control_register
43				  & ((FE_ALL_EXCEPT << 6) | FE_UPWARD));
44      temp.__status_register |= envp->__status_register & FE_ALL_EXCEPT;
45    }
46
47  __asm__ __volatile__ ("fmovem%.l %0,%/fpcr/%/fpsr/%/fpiar" : : "m" (*&temp));
48
49  /* Success.  */
50  return 0;
51}
52
53#include <shlib-compat.h>
54#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
55strong_alias (__fesetenv, __old_fesetenv)
56compat_symbol (libm, __old_fesetenv, fesetenv, GLIBC_2_1);
57#endif
58
59versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);
60