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glibc  2.9
fsetexcptflg.c
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00001 /* Set floating-point environment exception handling.
00002    Copyright (C) 1997,99,2000,01 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
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 <math.h>
00023 
00024 int
00025 __fesetexceptflag (const fexcept_t *flagp, int excepts)
00026 {
00027   fexcept_t fpsr;
00028 
00029   /* Get the current status register.  */
00030   __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
00031 
00032   /* Install the new exception bits in the Accrued Exception Byte.  */
00033   fpsr &= ~(excepts & FE_ALL_EXCEPT);
00034   fpsr |= *flagp & excepts & FE_ALL_EXCEPT;
00035 
00036   /* Store the new status register.  */
00037   __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
00038 
00039   /* Success.  */
00040   return 0;
00041 }
00042 
00043 #include <shlib-compat.h>
00044 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
00045 strong_alias (__fesetexceptflag, __old_fesetexceptflag)
00046 compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
00047 #endif
00048 
00049 versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);