Mercurial > hg > CbC > CbC_gcc
diff libgcc/config/lm32/_umodsi3.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
---|---|
date | Fri, 12 Feb 2010 23:39:51 +0900 |
parents | |
children | 04ced10e8804 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libgcc/config/lm32/_umodsi3.c Fri Feb 12 23:39:51 2010 +0900 @@ -0,0 +1,49 @@ +/* _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); +}