Back to index

glibc  2.9
fraiseexcpt.c
Go to the documentation of this file.
00001 /* Raise given exceptions.
00002    Copyright (C) 2000, 2002 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Andreas Jaeger <aj@suse.de>, 2000.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <fenv.h>
00022 #include <fenv_libc.h>
00023 #include <fpu_control.h>
00024 
00025 int
00026 feraiseexcept (int excepts)
00027 {
00028   fpu_control_t cw;
00029 
00030   /* Get current state.  */
00031   _FPU_GETCW (cw);
00032 
00033   /* Set flag bits (which are accumulative), and *also* set the 
00034      cause bits. The setting of the cause bits is what actually causes
00035      the hardware to generate the exception, if the corresponding enable
00036      bit is set as well.  */
00037 
00038   excepts &= FE_ALL_EXCEPT;
00039   cw |= excepts | (excepts << CAUSE_SHIFT);
00040 
00041   /* Set new state.  */
00042   _FPU_SETCW (cw);
00043 
00044   return 0;
00045 }
00046 
00047 libm_hidden_def (feraiseexcept)