gcc/libgcc/config/lm32/_modsi3.c

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config.gcc: Add lm32 elf and uclinux targets. gcc/ 2009-11-11 Jon Beniston <jon@beniston.com> * config.gcc: Add lm32 elf and uclinux targets. * config/lm32: New directory. * config/lm32/lm32.c: New file. * config/lm32/lm32.h: New file. * config/lm32/lm32.md: New file. * config/lm32/lm32.opt: New file. * config/lm32/lm32-protos.h: New file. * config/lm32/constraints.md: New file. * config/lm32/predicates.md: New file. * config/lm32/sfp-machine.h: New file. * config/lm32/t-fprules-softfp: New file. * config/lm32/uclinux-elf.h: New file. * doc/invoke.texi: Document lm32 options. * doc/contrib.texi: Document lm32 porter. * doc/install.texi: Document lm32 targets. gcc/testsuite/ 2009-11-11 Jon Beniston <jon@beniston.com> * lib/target-supports.exp (check_profiling_available): lm32 target doesn't support profiling. * gcc.dg/20020312-2.c: Add lm32 support. * g++.dg/other/packed1.C: Expect to fail on lm32. * g++.old-deja/g++.jason/thunk3.C: Likewise. libgcc/ 2009-11-11 Jon Beniston <jon@beniston.com> * config.host: Add lm32 targets. * config/lm32: New directory. * config/lm32/libgcc_lm32.h: New file. * config/lm32/_mulsi3.c: New file. * config/lm32/_udivmodsi4.c: New file. * config/lm32/_divsi3.c: New file. * config/lm32/_modsi3.c: New file. * config/lm32/_udivsi3.c: New file. * config/lm32/_umodsi3.c: New file. * config/lm32/_lshrsi3.S: New file. * config/lm32/_ashrsi3.S: New file. * config/lm32/_ashlsi3.S: New file. * config/lm32/crti.S: New file. * config/lm32/crtn.S: New file. * config/lm32/t-lm32: New file. * config/lm32/t-elf: New file. * config/lm32/t-uclinux: New file. From-SVN: r154096
2009-11-11 17:43:06 +01:00
/* _modsi3 for Lattice Mico32.
Contributed by Jon Beniston <jon@beniston.com>
Copyright (C) 2009-2014 Free Software Foundation, Inc.
config.gcc: Add lm32 elf and uclinux targets. gcc/ 2009-11-11 Jon Beniston <jon@beniston.com> * config.gcc: Add lm32 elf and uclinux targets. * config/lm32: New directory. * config/lm32/lm32.c: New file. * config/lm32/lm32.h: New file. * config/lm32/lm32.md: New file. * config/lm32/lm32.opt: New file. * config/lm32/lm32-protos.h: New file. * config/lm32/constraints.md: New file. * config/lm32/predicates.md: New file. * config/lm32/sfp-machine.h: New file. * config/lm32/t-fprules-softfp: New file. * config/lm32/uclinux-elf.h: New file. * doc/invoke.texi: Document lm32 options. * doc/contrib.texi: Document lm32 porter. * doc/install.texi: Document lm32 targets. gcc/testsuite/ 2009-11-11 Jon Beniston <jon@beniston.com> * lib/target-supports.exp (check_profiling_available): lm32 target doesn't support profiling. * gcc.dg/20020312-2.c: Add lm32 support. * g++.dg/other/packed1.C: Expect to fail on lm32. * g++.old-deja/g++.jason/thunk3.C: Likewise. libgcc/ 2009-11-11 Jon Beniston <jon@beniston.com> * config.host: Add lm32 targets. * config/lm32: New directory. * config/lm32/libgcc_lm32.h: New file. * config/lm32/_mulsi3.c: New file. * config/lm32/_udivmodsi4.c: New file. * config/lm32/_divsi3.c: New file. * config/lm32/_modsi3.c: New file. * config/lm32/_udivsi3.c: New file. * config/lm32/_umodsi3.c: New file. * config/lm32/_lshrsi3.S: New file. * config/lm32/_ashrsi3.S: New file. * config/lm32/_ashlsi3.S: New file. * config/lm32/crti.S: New file. * config/lm32/crtn.S: New file. * config/lm32/t-lm32: New file. * config/lm32/t-elf: New file. * config/lm32/t-uclinux: New file. From-SVN: r154096
2009-11-11 17:43:06 +01:00
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"
/* Signed integer modulus. */
SItype
__modsi3 (SItype a, SItype b)
{
int neg = 0;
SItype res;
int cfg;
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 ();
}
if (a < 0)
{
a = -a;
neg = 1;
}
if (b < 0)
b = -b;
__asm__ ("rcsr %0, CFG":"=r" (cfg));
if (cfg & 2)
__asm__ ("modu %0, %1, %2": "=r" (res):"r" (a), "r" (b));
else
res = __udivmodsi4 (a, b, 1);
if (neg)
res = -res;
return res;
}