88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* libgcc routines for ARC
|
|
Copyright (C) 2019-2022 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 & (1LL << 63)))
|
|
{
|
|
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
|