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/* Install given floating-point control modes. e500 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 <sysdep.h>
#include <sys/prctl.h>
#define SPEFSCR_STATUS 0xff3eff00
int
fesetmode (const femode_t *modep)
{
fenv_union_t u;
INTERNAL_SYSCALL_DECL (err);
int r;
u.fenv = *modep;
unsigned int spefscr = fegetenv_register ();
spefscr = (spefscr & SPEFSCR_STATUS) | (u.l[1] & ~SPEFSCR_STATUS);
fesetenv_register (spefscr);
r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC,
u.l[0] | PR_FP_EXC_SW_ENABLE);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
return -1;
return 0;
}
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