191 lines
3.8 KiB
C
191 lines
3.8 KiB
C
/* AIX FPU-related code.
|
|
Copyright (C) 2005-2014 Free Software Foundation, Inc.
|
|
Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
|
|
|
|
This file is part of the GNU Fortran runtime library (libgfortran).
|
|
|
|
Libgfortran is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 3 of the License, or (at your option) any later version.
|
|
|
|
Libgfortran 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 General Public License for more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
/* FPU-related code for AIX. */
|
|
#ifdef HAVE_FPTRAP_H
|
|
#include <fptrap.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_FPXCP_H
|
|
#include <fpxcp.h>
|
|
#endif
|
|
|
|
void
|
|
set_fpu (void)
|
|
{
|
|
fptrap_t mode = 0;
|
|
|
|
if (options.fpe & GFC_FPE_INVALID)
|
|
#ifdef TRP_INVALID
|
|
mode |= TRP_INVALID;
|
|
#else
|
|
estr_write ("Fortran runtime warning: IEEE 'invalid operation' "
|
|
"exception not supported.\n");
|
|
#endif
|
|
|
|
if (options.fpe & GFC_FPE_DENORMAL)
|
|
estr_write ("Fortran runtime warning: Floating point 'denormal operand' "
|
|
"exception not supported.\n");
|
|
|
|
if (options.fpe & GFC_FPE_ZERO)
|
|
#ifdef TRP_DIV_BY_ZERO
|
|
mode |= TRP_DIV_BY_ZERO;
|
|
#else
|
|
estr_write ("Fortran runtime warning: IEEE 'division by zero' "
|
|
"exception not supported.\n");
|
|
#endif
|
|
|
|
if (options.fpe & GFC_FPE_OVERFLOW)
|
|
#ifdef TRP_OVERFLOW
|
|
mode |= TRP_OVERFLOW;
|
|
#else
|
|
estr_write ("Fortran runtime warning: IEEE 'overflow' "
|
|
"exception not supported.\n");
|
|
#endif
|
|
|
|
if (options.fpe & GFC_FPE_UNDERFLOW)
|
|
#ifdef TRP_UNDERFLOW
|
|
mode |= TRP_UNDERFLOW;
|
|
#else
|
|
estr_write ("Fortran runtime warning: IEEE 'underflow' "
|
|
"exception not supported.\n");
|
|
#endif
|
|
|
|
if (options.fpe & GFC_FPE_INEXACT)
|
|
#ifdef TRP_INEXACT
|
|
mode |= TRP_INEXACT;
|
|
#else
|
|
estr_write ("Fortran runtime warning: IEEE 'inexact' "
|
|
"exception not supported.\n");
|
|
#endif
|
|
|
|
fp_trap(FP_TRAP_SYNC);
|
|
fp_enable(mode);
|
|
}
|
|
|
|
|
|
int
|
|
get_fpu_except_flags (void)
|
|
{
|
|
int result, set_excepts;
|
|
|
|
result = 0;
|
|
|
|
#ifdef HAVE_FPXCP_H
|
|
if (!fp_any_xcp ())
|
|
return 0;
|
|
|
|
if (fp_invalid_op ())
|
|
result |= GFC_FPE_INVALID;
|
|
|
|
if (fp_divbyzero ())
|
|
result |= GFC_FPE_ZERO;
|
|
|
|
if (fp_overflow ())
|
|
result |= GFC_FPE_OVERFLOW;
|
|
|
|
if (fp_underflow ())
|
|
result |= GFC_FPE_UNDERFLOW;
|
|
|
|
if (fp_inexact ())
|
|
result |= GFC_FPE_INEXACT;
|
|
#endif
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
int
|
|
get_fpu_rounding_mode (void)
|
|
{
|
|
int rnd_mode;
|
|
|
|
rnd_mode = fegetround ();
|
|
|
|
switch (rnd_mode)
|
|
{
|
|
#ifdef FE_TONEAREST
|
|
case FE_TONEAREST:
|
|
return GFC_FPE_TONEAREST;
|
|
#endif
|
|
|
|
#ifdef FE_UPWARD
|
|
case FE_UPWARD:
|
|
return GFC_FPE_UPWARD;
|
|
#endif
|
|
|
|
#ifdef FE_DOWNWARD
|
|
case FE_DOWNWARD:
|
|
return GFC_FPE_DOWNWARD;
|
|
#endif
|
|
|
|
#ifdef FE_TOWARDZERO
|
|
case FE_TOWARDZERO:
|
|
return GFC_FPE_TOWARDZERO;
|
|
#endif
|
|
default:
|
|
return GFC_FPE_INVALID;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
set_fpu_rounding_mode (int mode)
|
|
{
|
|
int rnd_mode;
|
|
|
|
switch (mode)
|
|
{
|
|
#ifdef FE_TONEAREST
|
|
case GFC_FPE_TONEAREST:
|
|
rnd_mode = FE_TONEAREST;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef FE_UPWARD
|
|
case GFC_FPE_UPWARD:
|
|
rnd_mode = FE_UPWARD;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef FE_DOWNWARD
|
|
case GFC_FPE_DOWNWARD:
|
|
rnd_mode = FE_DOWNWARD;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef FE_TOWARDZERO
|
|
case GFC_FPE_TOWARDZERO:
|
|
rnd_mode = FE_TOWARDZERO;
|
|
break;
|
|
#endif
|
|
default:
|
|
return;
|
|
}
|
|
|
|
fesetround (rnd_mode);
|
|
}
|