50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* _umodsi3 for Lattice Mico32.
|
|
Contributed by Jon Beniston <jon@beniston.com>
|
|
|
|
Copyright (C) 2009-2013 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);
|
|
}
|