/* Set floating-point environment exception handling.   Copyright (C) 2001, 2003 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <fenv.h>#include <math.h>intfesetexceptflag (const fexcept_t *flagp, int excepts){  fenv_t temp;  unsigned int mxcsr;  /* XXX: Do we really need to set both the exception in both units?     Shouldn't it be enough to set only the SSE unit?  */  /* Get the current x87 FPU environment.  We have to do this since we     cannot separately set the status word.  */  __asm__ ("fnstenv %0" : "=m" (*&temp));  temp.__status_word &= ~(excepts & FE_ALL_EXCEPT);  temp.__status_word |= *flagp & excepts & FE_ALL_EXCEPT;  /* Store the new status word (along with the rest of the environment.     Possibly new exceptions are set but they won't get executed unless     the next floating-point instruction.  */  __asm__ ("fldenv %0" : : "m" (*&temp));  /* And now the same for SSE.  */  __asm__ ("stmxcsr %0" : "=m" (*&mxcsr));  mxcsr &= ~(excepts & FE_ALL_EXCEPT);  mxcsr |= *flagp & excepts & FE_ALL_EXCEPT;  __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));  /* Success.  */  return 0;}