gcc/libgcc/config/nios2/lib2-divmod.c

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/* Copyright (C) 2012-2020 Free Software Foundation, Inc.
Commit of nios2 port to trunk: contrib/ 2013-12-31 Chung-Lin Tang <cltang@codesourcery.com> * config-list.mk: Add nios2-elf, nios2-linux-gnu. Corrected ordering of some configs. gcc/ 2013-12-31 Chung-Lin Tang <cltang@codesourcery.com> Sandra Loosemore <sandra@codesourcery.com> Based on patches from Altera Corporation * config.gcc (nios2-*-*): Add nios2 config targets. * configure.ac (TLS_SECTION_ASM_FLAG): Add nios2 case. ("$cpu_type"): Add nios2 as new cpu type. * configure: Regenerate. * config/nios2/nios2.c: New file. * config/nios2/nios2.h: New file. * config/nios2/nios2-opts.h: New file. * config/nios2/nios2-protos.h: New file. * config/nios2/elf.h: New file. * config/nios2/elf.opt: New file. * config/nios2/linux.h: New file. * config/nios2/nios2.opt: New file. * config/nios2/nios2.md: New file. * config/nios2/predicates.md: New file. * config/nios2/constraints.md: New file. * config/nios2/t-nios2: New file. * common/config/nios2/nios2-common.c: New file. * doc/invoke.texi (Nios II options): Document Nios II specific options. * doc/md.texi (Nios II family): Document Nios II specific constraints. * doc/extend.texi (Function Specific Option Pragmas): Document Nios II supported target pragma functionality. gcc/testsuite/ 2013-12-31 Sandra Loosemore <sandra@codesourcery.com> Chung-Lin Tang <cltang@codesourcery.com> Based on patches from Altera Corporation * gcc.dg/stack-usage-1.c (SIZE): Define case for __nios2__. * gcc.dg/20040813-1.c: Skip for nios2-*-*. * gcc.dg/20020312-2.c: Add __nios2__ case. * g++.dg/other/PR23205.C: Skip for nios2-*-*. * g++.dg/other/pr23205-2.C: Skip for nios2-*-*. * g++.dg/cpp0x/constexpr-rom.C: Skip for nios2-*-*. * g++.dg/cpp0x/alias-decl-debug-0.C: Skip for nios2-*-*. * g++.old-deja/g++.jason/thunk3.C: Skip for nios2-*-*. * lib/target-supports.exp (check_profiling_available): Check for nios2-*-elf. * gcc.c-torture/execute/pr47237.x:: Skip for nios2-*-*. * gcc.c-torture/execute/20101011-1.c: Skip for nios2-*-*. * gcc.c-torture/execute/builtins/lib/chk.c (memset): Place char-based memset loop before inline check, to prevent problems when called to initialize .bss. Update comments. * gcc.target/nios2/nios2.exp: New DejaGNU file. * gcc.target/nios2/nios2-custom-1.c: New test. * gcc.target/nios2/nios2-trap-insn.c: New test. * gcc.target/nios2/nios2-builtin-custom.c: New test. * gcc.target/nios2/nios2-builtin-io.c: New test. * gcc.target/nios2/nios2-stack-check-1.c: New test. * gcc.target/nios2/nios2-stack-check-2.c: New test. * gcc.target/nios2/nios2-rdctl.c: New test. * gcc.target/nios2/nios2-wrctl.c: New test. * gcc.target/nios2/nios2-wrctl-zero.c: New test. * gcc.target/nios2/nios2-wrctl-not-zero.c: New test. * gcc.target/nios2/nios2-rdwrctl-1.c: New test. * gcc.target/nios2/nios2-reg-constraints.c: New test. * gcc.target/nios2/nios2-ashlsi3-one_shift.c: New test. * gcc.target/nios2/nios2-mul-options-1.c: New test. * gcc.target/nios2/nios2-mul-options-2.c: New test. * gcc.target/nios2/nios2-mul-options-3.c: New test. * gcc.target/nios2/nios2-mul-options-4.c: New test. * gcc.target/nios2/nios2-nor.c: New test. * gcc.target/nios2/nios2-stxio.c: New test. * gcc.target/nios2/custom-fp-1.c: New test. * gcc.target/nios2/custom-fp-2.c: New test. * gcc.target/nios2/custom-fp-3.c: New test. * gcc.target/nios2/custom-fp-4.c: New test. * gcc.target/nios2/custom-fp-5.c: New test. * gcc.target/nios2/custom-fp-6.c: New test. * gcc.target/nios2/custom-fp-7.c: New test. * gcc.target/nios2/custom-fp-8.c: New test. * gcc.target/nios2/custom-fp-cmp-1.c: New test. * gcc.target/nios2/custom-fp-conversion.c: New test. * gcc.target/nios2/custom-fp-double.c: New test. * gcc.target/nios2/custom-fp-float.c: New test. * gcc.target/nios2/nios2-int-types.c: New test. * gcc.target/nios2/nios2-cache-1.c: New test. * gcc.target/nios2/nios2-cache-2.c: New test. libgcc/ 2013-12-31 Sandra Loosemore <sandra@codesourcery.com> Chung-Lin Tang <cltang@codesourcery.com> Based on patches from Altera Corporation * config.host (nios2-*-*,nios2-*-linux*): Add nios2 host cases. * config/nios2/lib2-nios2.h: New file. * config/nios2/lib2-divmod-hi.c: New file. * config/nios2/linux-unwind.h: New file. * config/nios2/lib2-divmod.c: New file. * config/nios2/linux-atomic.c: New file. * config/nios2/t-nios2: New file. * config/nios2/crti.asm: New file. * config/nios2/t-linux: New file. * config/nios2/lib2-divtable.c: New file. * config/nios2/lib2-mul.c: New file. * config/nios2/tramp.c: New file. * config/nios2/crtn.asm: New file. From-SVN: r206256
2013-12-31 08:05:35 +01:00
Contributed by Altera and Mentor Graphics, 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 "lib2-nios2.h"
/* 32-bit SI divide and modulo as used in Nios II. */
static USItype
udivmodsi4 (USItype num, USItype den, word_type modwanted)
{
USItype bit = 1;
USItype res = 0;
while (den < num && bit && !(den & (1L<<31)))
{
den <<=1;
bit <<=1;
}
while (bit)
{
if (num >= den)
{
num -= den;
res |= bit;
}
bit >>=1;
den >>=1;
}
if (modwanted)
return num;
return res;
}
SItype
__divsi3 (SItype a, SItype b)
{
word_type neg = 0;
SItype res;
if (a < 0)
{
a = -a;
neg = !neg;
}
if (b < 0)
{
b = -b;
neg = !neg;
}
res = udivmodsi4 (a, b, 0);
if (neg)
res = -res;
return res;
}
SItype
__modsi3 (SItype a, SItype b)
{
word_type neg = 0;
SItype res;
if (a < 0)
{
a = -a;
neg = 1;
}
if (b < 0)
b = -b;
res = udivmodsi4 (a, b, 1);
if (neg)
res = -res;
return res;
}
SItype
__udivsi3 (SItype a, SItype b)
{
return udivmodsi4 (a, b, 0);
}
SItype
__umodsi3 (SItype a, SItype b)
{
return udivmodsi4 (a, b, 1);
}