1 /* Raise given exceptions.
2 Copyright (C) 1997-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>, 2012.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
22 #include <fpu_control.h>
26 feraiseexcept (int excepts)
31 /* Raise exceptions represented by EXPECTS. */
33 if (excepts & FE_INEXACT)
35 double d = 1.0, x = 3.0;
36 __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
39 if (excepts & FE_UNDERFLOW)
41 long double d = LDBL_MIN, x = 10;
42 __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
45 if (excepts & FE_OVERFLOW)
47 long double d = LDBL_MAX;
48 __asm__ __volatile__ ("fmul %0, %0" : "+d" (d) : "d" (d));
51 if (excepts & FE_DIVBYZERO)
53 double d = 1.0, x = 0.0;
54 __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
57 if (excepts & FE_INVALID)
59 double d = HUGE_VAL, x = 0.0;
60 __asm__ __volatile__ ("fmul %1, %0" : "+d" (d) : "d" (x));
64 /* Restore flag fields. */
67 cw |= (excepts & FE_ALL_EXCEPT);
73 libm_hidden_def (feraiseexcept)