148 lines
3.1 KiB
C
148 lines
3.1 KiB
C
/* libgcc routines for R8C/M16C/M32C
|
|
Copyright (C) 2005-2016 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/>. */
|
|
|
|
typedef int sint32_type __attribute__ ((mode (SI)));
|
|
typedef unsigned int uint32_type __attribute__ ((mode (SI)));
|
|
typedef int word_type __attribute__ ((mode (__word__)));
|
|
|
|
uint32_type udivmodsi4 (uint32_type, uint32_type, word_type);
|
|
sint32_type __divsi3 (sint32_type, sint32_type);
|
|
sint32_type __modsi3 (sint32_type, sint32_type);
|
|
|
|
uint32_type
|
|
udivmodsi4 (uint32_type num, uint32_type den, word_type modwanted)
|
|
{
|
|
uint32_type bit = 1;
|
|
uint32_type 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;
|
|
}
|
|
|
|
sint32_type
|
|
__divsi3 (sint32_type a, sint32_type b)
|
|
{
|
|
word_type neg = 0;
|
|
sint32_type 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;
|
|
}
|
|
|
|
sint32_type
|
|
__modsi3 (sint32_type a, sint32_type b)
|
|
{
|
|
word_type neg = 0;
|
|
sint32_type res;
|
|
|
|
if (a < 0)
|
|
{
|
|
a = -a;
|
|
neg = 1;
|
|
}
|
|
|
|
if (b < 0)
|
|
b = -b;
|
|
|
|
res = udivmodsi4 (a, b, 1);
|
|
|
|
if (neg)
|
|
res = -res;
|
|
|
|
return res;
|
|
}
|
|
|
|
/* See the comment by the definition of LIBGCC2_UNITS_PER_WORD in
|
|
m32c.h for why we are creating extra versions of some of the
|
|
functions defined in libgcc2.c. */
|
|
|
|
#define LIBGCC2_UNITS_PER_WORD 2
|
|
|
|
#define L_clzsi2
|
|
#define L_ctzsi2
|
|
#define L_ffssi2
|
|
#define L_paritysi2
|
|
#define L_popcountsi2
|
|
|
|
#include "libgcc2.c"
|
|
|
|
uint32_type
|
|
__udivsi3 (uint32_type a, uint32_type b)
|
|
{
|
|
return udivmodsi4 (a, b, 0);
|
|
}
|
|
|
|
uint32_type
|
|
__umoddi3 (uint32_type a, uint32_type b)
|
|
{
|
|
return udivmodsi4 (a, b, 1);
|
|
}
|
|
|
|
/* Returns the number of leading redundant sign bits in X.
|
|
I.e. the number of bits following the most significant bit which are
|
|
identical to it. There are no special cases for 0 or other values. */
|
|
|
|
int
|
|
__clrsbhi2 (word_type x)
|
|
{
|
|
if (x < 0)
|
|
x = ~x;
|
|
if (x == 0)
|
|
return 15;
|
|
return __builtin_clz (x) - 1;
|
|
}
|