Subversion Repositories openrisc_me

/*

 * Copyright (C) 2001, 2009 Free Software Foundation, Inc.

 * Contributed by David S. Miller (davem@redhat.com)

 *

 * This file is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the

 * Free Software Foundation; either version 3, or (at your option) any

 * later version.

 *

 * This file 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

 * General Public License for more details.

 *

 * Under Section 7 of GPL version 3, you are granted additional

 * permissions described in the GCC Runtime Library Exception, version

 * 3.1, as published by the Free Software Foundation.

 *

 * You should have received a copy of the GNU General Public License and

 * a copy of the GCC Runtime Library Exception along with this program;

 * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

 * <http://www.gnu.org/licenses/>.

 */

#define FPRS_NS         (1 << 22)       /* Non-Standard fpu results */

static void __attribute__((constructor))

set_fast_math (void)

{

  unsigned int fsr;

  /* This works for the 64-bit case because, even if 32-bit ld/st of

     the fsr register modified the upper 32-bit, the only thing up there

     are the 3 other condition codes which are "do not care" at the time

     that this runs.  */

  __asm__("st %%fsr, %0"

          : "=m" (fsr));

  fsr |= FPRS_NS;

  __asm__("ld %0, %%fsr"

          : : "m" (fsr));

}