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/* Set current rounding direction.
Copyright (C) 2004-2014 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.h>
#include <fpu_control.h>
#include <arm-features.h>
int
fesetround (int round)
{
fpu_control_t fpscr;
/* FE_TONEAREST is the only supported rounding mode
if a VFP unit isn't present. */
if (!ARM_HAVE_VFP)
return (round == FE_TONEAREST) ? 0 : 1;
/* Fail if the rounding mode is not valid. */
if (round & ~FE_TOWARDZERO)
return 1;
_FPU_GETCW (fpscr);
fpscr = (fpscr & ~FE_TOWARDZERO) | round;
_FPU_SETCW (fpscr);
return 0;
}
libm_hidden_def (fesetround)
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