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/* libgcc routines for ARC
Copyright (C) 2019-2025 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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.
GCC 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/>. */
typedef int sint64_t __attribute__ ((mode (DI)));
typedef unsigned int uint64_t __attribute__ ((mode (DI)));
typedef unsigned int nint32_t __attribute__ ((mode (SI)));
typedef int word_t __attribute__ ((mode (__word__)));
sint64_t __muldi3 (sint64_t, sint64_t);
nint32_t __umodsi3 (nint32_t, nint32_t);
#ifdef __ARC_RF16__
/* Generic multiplication procedure. No mpy operation involved. */
sint64_t
__muldi3 (sint64_t a, sint64_t b)
{
sint64_t res = 0;
uint64_t cnt = a;
while (cnt)
{
if (cnt & 1)
res += b;
b <<= 1;
cnt >>= 1;
}
return res;
}
/* Unsigned 32bit integer division/modulus. */
static inline __attribute__ ((__always_inline__))
nint32_t
udivmodsi4 (nint32_t num, nint32_t den, word_t modwanted)
{
nint32_t bit = 1;
nint32_t 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;
}
nint32_t
__umodsi3 (nint32_t a, nint32_t b)
{
return udivmodsi4 (a, b, 1);
}
#endif
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