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/* _umodsi3 for Lattice Mico32.

   Contributed by Jon Beniston <jon@beniston.com>

   Copyright (C) 2009 Free Software Foundation, Inc.

   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/>. */

#include "libgcc_lm32.h"

/* Unsigned modulus.  */

USItype

__umodsi3 (USItype a, USItype b)

{

  if (b == 0)

    {

      /* Raise divide by zero exception.  */

      int eba, sr;

      /* Save interrupt enable.  */

      __asm__ __volatile__ ("rcsr %0, IE":"=r" (sr));

      sr = (sr & 1) << 1;

      __asm__ __volatile__ ("wcsr IE, %0"::"r" (sr));

      /* Branch to exception handler.  */

      __asm__ __volatile__ ("rcsr %0, EBA":"=r" (eba));

      eba += 32 * 5;

      __asm__ __volatile__ ("mv ea, ra");

      __asm__ __volatile__ ("b %0"::"r" (eba));

      __builtin_unreachable ();

    }

  return __udivmodsi4 (a, b, 1);

}