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glibc  2.9
feholdexcpt.c
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00001 /* Store current floating-point environment and clear exceptions.
00002    Copyright (C) 2000 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 <fpu_control.h>
00023 
00024 int
00025 feholdexcept (fenv_t *envp)
00026 {
00027   fpu_control_t cw;
00028 
00029   /* Save the current state.  */
00030   _FPU_GETCW (cw);
00031   envp->__fp_control_register = cw;
00032 
00033   /* Clear all exception enable bits and flags.  */
00034   cw &= ~(_FPU_MASK_V|_FPU_MASK_Z|_FPU_MASK_O|_FPU_MASK_U|_FPU_MASK_I|FE_ALL_EXCEPT);
00035   _FPU_SETCW (cw);
00036 
00037   return 0;
00038 }
00039 
00040 libm_hidden_def (feholdexcept)