118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/* libgcc routines for MSP430
|
|
Copyright (C) 2005-2015 Free Software Foundation, Inc.
|
|
Contributed by Red Hat.
|
|
|
|
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/>. */
|
|
|
|
UINT_TYPE C3(udivmod,NAME_MODE,4) (UINT_TYPE, UINT_TYPE, word_type);
|
|
SINT_TYPE C3(__div,NAME_MODE,3) (SINT_TYPE, SINT_TYPE);
|
|
SINT_TYPE C3(__mod,NAME_MODE,3) (SINT_TYPE, SINT_TYPE);
|
|
UINT_TYPE C3(__udiv,NAME_MODE,3) (UINT_TYPE, UINT_TYPE);
|
|
UINT_TYPE C3(__umod,NAME_MODE,3) (UINT_TYPE, UINT_TYPE);
|
|
|
|
UINT_TYPE
|
|
C3(udivmod,NAME_MODE,4) (UINT_TYPE num, UINT_TYPE den, word_type modwanted)
|
|
{
|
|
UINT_TYPE bit = 1;
|
|
UINT_TYPE res = 0;
|
|
|
|
while (den < num && bit && !(den & (1L << BITS_MINUS_1)))
|
|
{
|
|
den <<= 1;
|
|
bit <<= 1;
|
|
}
|
|
while (bit)
|
|
{
|
|
if (num >= den)
|
|
{
|
|
num -= den;
|
|
res |= bit;
|
|
}
|
|
bit >>= 1;
|
|
den >>= 1;
|
|
}
|
|
if (modwanted)
|
|
return num;
|
|
return res;
|
|
}
|
|
|
|
SINT_TYPE
|
|
C3(__div,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
|
|
{
|
|
word_type neg = 0;
|
|
SINT_TYPE res;
|
|
|
|
if (a < 0)
|
|
{
|
|
a = -a;
|
|
neg = !neg;
|
|
}
|
|
|
|
if (b < 0)
|
|
{
|
|
b = -b;
|
|
neg = !neg;
|
|
}
|
|
|
|
res = C3(udivmod,NAME_MODE,4) (a, b, 0);
|
|
|
|
if (neg)
|
|
res = -res;
|
|
|
|
return res;
|
|
}
|
|
|
|
SINT_TYPE
|
|
C3(__mod,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
|
|
{
|
|
word_type neg = 0;
|
|
SINT_TYPE res;
|
|
|
|
if (a < 0)
|
|
{
|
|
a = -a;
|
|
neg = 1;
|
|
}
|
|
|
|
if (b < 0)
|
|
b = -b;
|
|
|
|
res = C3(udivmod,NAME_MODE,4) (a, b, 1);
|
|
|
|
if (neg)
|
|
res = -res;
|
|
|
|
return res;
|
|
}
|
|
|
|
UINT_TYPE
|
|
C3(__udiv,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
|
|
{
|
|
return C3(udivmod,NAME_MODE,4) (a, b, 0);
|
|
}
|
|
|
|
UINT_TYPE
|
|
C3(__umod,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
|
|
{
|
|
return C3(udivmod,NAME_MODE,4) (a, b, 1);
|
|
}
|