/* Enable floating-point exceptions. Copyright (C) 1999, 2000, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1999. 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 <unistd.h> int feenableexcept (int excepts) { unsigned short int new_exc; unsigned short int old_exc; /* Get the current control word. */ __asm__ ("fstcw %0" : "=m" (*&new_exc)); excepts &= FE_ALL_EXCEPT; old_exc = (~new_exc) & FE_ALL_EXCEPT; new_exc &= ~excepts; __asm__ ("fldcw %0" : : "m" (*&new_exc)); #if 0 /* If the CPU supports SSE we set the MXCSR as well. */ if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0) { unsigned int xnew_exc; /* Get the current control word. */ __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc)); xnew_exc &= ~(excepts << 7); __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc)); } #endif return old_exc; }