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/* Software floating-point emulation.
Helper routine for _Q_* routines.
Simulate exceptions using double arithmetics.
Copyright (C) 1999, 2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek (jj@ultra.linux.cz).
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 "soft-fp.h"
unsigned long long ___Q_zero = 0x0000000000000000ULL;
void ___Q_simulate_exceptions(int exceptions)
{
fpu_control_t fcw;
int tem, ou;
_FPU_GETCW(fcw);
tem = (fcw >> 23) & 0x1f;
ou = exceptions & (FP_EX_OVERFLOW | FP_EX_UNDERFLOW);
if (ou & tem)
exceptions &= ~FP_EX_INVALID;
fcw &= ~0x1f;
fcw |= (exceptions | (exceptions << 5));
_FPU_SETCW(fcw);
}
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