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/* Copyright (C) 2012-2023 Free Software Foundation, Inc.
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-gcn.h"
/* 32-bit SI divide and modulo as used in gcn. */
union pack {
UDItype di;
struct {SItype quot, rem;} pair;
};
union upack {
UDItype di;
struct {USItype quot, rem;} pair;
};
UDItype
__udivmodsi4 (USItype num, USItype den)
{
USItype bit = 1;
union upack res = {0};
while (den < num && bit && !(den & (1L<<31)))
{
den <<=1;
bit <<=1;
}
while (bit)
{
if (num >= den)
{
num -= den;
res.pair.quot |= bit;
}
bit >>=1;
den >>=1;
}
res.pair.rem = num;
return res.di;
}
UDItype
__divmodsi4 (SItype a, SItype b)
{
word_type nega = 0, negb = 0;
union pack res;
if (a < 0)
{
a = -a;
nega = 1;
}
if (b < 0)
{
b = -b;
negb = 1;
}
res.di = __udivmodsi4 (a, b);
if (nega)
res.pair.rem = -res.pair.rem;
if (nega ^ negb)
res.pair.quot = -res.pair.quot;
return res.di;
}
SItype
__divsi3 (SItype a, SItype b)
{
union pack u;
u.di = __divmodsi4 (a, b);
return u.pair.quot;
}
SItype
__modsi3 (SItype a, SItype b)
{
union pack u;
u.di = __divmodsi4 (a, b);
return u.pair.rem;
}
USItype
__udivsi3 (USItype a, USItype b)
{
union pack u;
u.di = __udivmodsi4 (a, b);
return u.pair.quot;
}
USItype
__umodsi3 (USItype a, USItype b)
{
union pack u;
u.di = __udivmodsi4 (a, b);
return u.pair.rem;
}
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