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/* _udivsi3 for Lattice Mico32.
Contributed by Jon Beniston <jon@beniston.com>
Copyright (C) 2009-2022 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 integer division. */
USItype
__udivsi3 (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, 0);
}
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