1 /* Raise given exceptions.
2 Copyright (C) 1997,99,2000,01,02,04 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 #include <fenv_libc.h>
24 __FERAISEEXCEPT_INTERNAL (int excepts)
28 f = fegetenv_register ();
29 f |= (excepts & FE_ALL_EXCEPT);
30 fesetenv_register (f);
32 /* Force the operations that cause the exceptions. */
33 if ((FE_INVALID & excepts) != 0)
35 /* ?? Does not set sticky bit ?? */
37 asm volatile ("efsdiv %0,%0,%1" : : "r" (0), "r" (0));
40 if ((FE_DIVBYZERO & excepts) != 0)
43 asm volatile ("efsdiv %0,%0,%1" : : "r" (1.0F), "r" (0));
46 if ((FE_OVERFLOW & excepts) != 0)
48 /* ?? Does not set sticky bit ?? */
49 /* Largest normalized number plus itself. */
50 asm volatile ("efsadd %0,%0,%1" : : "r" (0x7f7fffff), "r" (0x7f7fffff));
53 if ((FE_UNDERFLOW & excepts) != 0)
55 /* ?? Does not set sticky bit ?? */
56 /* Smallest normalized number times itself. */
57 asm volatile ("efsmul %0,%0,%1" : : "r" (0x800000), "r" (0x800000));
60 if ((FE_INEXACT & excepts) != 0)
62 /* Smallest normalized minus 1.0 raises the inexact flag. */
63 asm volatile ("efssub %0,%0,%1" : : "r" (0x00800000), "r" (1.0F));