1 /* AIX FPU-related code.
2 Copyright (C) 2005-2014 Free Software Foundation, Inc.
3 Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
5 This file is part of the GNU Fortran runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
27 /* FPU-related code for AIX. */
41 if (options
.fpe
& GFC_FPE_INVALID
)
45 estr_write ("Fortran runtime warning: IEEE 'invalid operation' "
46 "exception not supported.\n");
49 if (options
.fpe
& GFC_FPE_DENORMAL
)
50 estr_write ("Fortran runtime warning: Floating point 'denormal operand' "
51 "exception not supported.\n");
53 if (options
.fpe
& GFC_FPE_ZERO
)
54 #ifdef TRP_DIV_BY_ZERO
55 mode
|= TRP_DIV_BY_ZERO
;
57 estr_write ("Fortran runtime warning: IEEE 'division by zero' "
58 "exception not supported.\n");
61 if (options
.fpe
& GFC_FPE_OVERFLOW
)
65 estr_write ("Fortran runtime warning: IEEE 'overflow' "
66 "exception not supported.\n");
69 if (options
.fpe
& GFC_FPE_UNDERFLOW
)
71 mode
|= TRP_UNDERFLOW
;
73 estr_write ("Fortran runtime warning: IEEE 'underflow' "
74 "exception not supported.\n");
77 if (options
.fpe
& GFC_FPE_INEXACT
)
81 estr_write ("Fortran runtime warning: IEEE 'inexact' "
82 "exception not supported.\n");
85 fp_trap(FP_TRAP_SYNC
);
91 get_fpu_except_flags (void)
93 int result
, set_excepts
;
101 if (fp_invalid_op ())
102 result
|= GFC_FPE_INVALID
;
105 result
|= GFC_FPE_ZERO
;
108 result
|= GFC_FPE_OVERFLOW
;
111 result
|= GFC_FPE_UNDERFLOW
;
114 result
|= GFC_FPE_INEXACT
;
122 get_fpu_rounding_mode (void)
126 rnd_mode
= fegetround ();
132 return GFC_FPE_TONEAREST
;
137 return GFC_FPE_UPWARD
;
142 return GFC_FPE_DOWNWARD
;
147 return GFC_FPE_TOWARDZERO
;
150 return GFC_FPE_INVALID
;
156 set_fpu_rounding_mode (int mode
)
163 case GFC_FPE_TONEAREST
:
164 rnd_mode
= FE_TONEAREST
;
170 rnd_mode
= FE_UPWARD
;
175 case GFC_FPE_DOWNWARD
:
176 rnd_mode
= FE_DOWNWARD
;
181 case GFC_FPE_TOWARDZERO
:
182 rnd_mode
= FE_TOWARDZERO
;
189 fesetround (rnd_mode
);