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/* Install given floating-point control modes. PowerPC version.
Copyright (C) 2016-2017 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_libc.h>
#include <fpu_control.h>
#define _FPU_MASK_ALL (_FPU_MASK_ZM | _FPU_MASK_OM | _FPU_MASK_UM \
| _FPU_MASK_XM | _FPU_MASK_IM)
#define FPU_STATUS 0xbffff700ULL
int
fesetmode (const femode_t *modep)
{
fenv_union_t old, new;
/* Logic regarding enabled exceptions as in fesetenv. */
new.fenv = *modep;
old.fenv = fegetenv_register ();
new.l = (new.l & ~FPU_STATUS) | (old.l & FPU_STATUS);
if (old.l == new.l)
return 0;
if ((old.l & _FPU_MASK_ALL) == 0 && (new.l & _FPU_MASK_ALL) != 0)
(void) __fe_nomask_env_priv ();
if ((old.l & _FPU_MASK_ALL) != 0 && (new.l & _FPU_MASK_ALL) == 0)
(void) __fe_mask_env ();
fesetenv_register (new.fenv);
return 0;
}
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