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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [mep/] [lib2funcs.c] - Blame information for rev 737

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/* libgcc routines for MeP.
   Copyright 2001, 2002, 2009 Free Software Foundation, 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 of the License, 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/>.  */
 
typedef          int SItype             __attribute__ ((mode (SI)));
typedef unsigned int USItype            __attribute__ ((mode (SI)));
 
typedef int word_type                   __attribute__ ((mode (__word__)));
 
USItype
__mulsi3 (USItype a, USItype b)
{
  USItype c = 0;
 
  while (a != 0)
    {
      if (a & 1)
        c += b;
      a >>= 1;
      b <<= 1;
    }
 
  return c;
}
 
 
 
USItype
udivmodsi4(USItype num, USItype den, word_type modwanted)
{
  USItype bit = 1;
  USItype 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;
}
 
 
 
SItype
__divsi3 (SItype a, SItype b)
{
  word_type neg = 0;
  SItype 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;
}
 
 
 
SItype
__modsi3 (SItype a, SItype b)
{
  word_type neg = 0;
  SItype res;
 
  if (a < 0)
    {
      a = -a;
      neg = 1;
    }
 
  if (b < 0)
    b = -b;
 
  res = udivmodsi4 (a, b, 1);
 
  if (neg)
    res = -res;
 
  return res;
}
 
 
 
 
SItype
__udivsi3 (SItype a, SItype b)
{
  return udivmodsi4 (a, b, 0);
}
 
 
 
SItype
__umodsi3 (SItype a, SItype b)
{
  return udivmodsi4 (a, b, 1);
}

Line No.	Rev	Author	Line
1	734	jeremybenn	`/* libgcc routines for MeP.`
2			`Copyright 2001, 2002, 2009 Free Software Foundation, Inc`
3
4			`This file is free software; you can redistribute it and/or modify it`
5			`under the terms of the GNU General Public License as published by the`
6			`Free Software Foundation; either version 3 of the License, or (at your`
7			`option) any later version.`
8
9			`This file is distributed in the hope that it will be useful, but`
10			`WITHOUT ANY WARRANTY; without even the implied warranty of`
11			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
12			`General Public License for more details.`
13
14			`Under Section 7 of GPL version 3, you are granted additional`
15			`permissions described in the GCC Runtime Library Exception, version`
16			`3.1, as published by the Free Software Foundation.`
17
18			`You should have received a copy of the GNU General Public License and`
19			`a copy of the GCC Runtime Library Exception along with this program;`
20			`see the files COPYING3 and COPYING.RUNTIME respectively. If not, see`
21			`<http://www.gnu.org/licenses/>. */`
22
23			`typedef int SItype __attribute__ ((mode (SI)));`
24			`typedef unsigned int USItype __attribute__ ((mode (SI)));`
25
26			`typedef int word_type __attribute__ ((mode (__word__)));`
27
28			`USItype`
29			`__mulsi3 (USItype a, USItype b)`
30			`{`
31			`USItype c = 0;`
32
33			`while (a != 0)`
34			`{`
35			`if (a & 1)`
36			`c += b;`
37			`a >>= 1;`
38			`b <<= 1;`
39			`}`
40
41			`return c;`
42			`}`
43
44
45
46			`USItype`
47			`udivmodsi4(USItype num, USItype den, word_type modwanted)`
48			`{`
49			`USItype bit = 1;`
50			`USItype res = 0;`
51
52			`while (den < num && bit && !(den & (1L<<31)))`
53			`{`
54			`den <<=1;`
55			`bit <<=1;`
56			`}`
57			`while (bit)`
58			`{`
59			`if (num >= den)`
60			`{`
61			`num -= den;`
62			`res \|= bit;`
63			`}`
64			`bit >>=1;`
65			`den >>=1;`
66			`}`
67			`if (modwanted) return num;`
68			`return res;`
69			`}`
70
71
72
73			`SItype`
74			`__divsi3 (SItype a, SItype b)`
75			`{`
76			`word_type neg = 0;`
77			`SItype res;`
78
79			`if (a < 0)`
80			`{`
81			`a = -a;`
82			`neg = !neg;`
83			`}`
84
85			`if (b < 0)`
86			`{`
87			`b = -b;`
88			`neg = !neg;`
89			`}`
90
91			`res = udivmodsi4 (a, b, 0);`
92
93			`if (neg)`
94			`res = -res;`
95
96			`return res;`
97			`}`
98
99
100
101			`SItype`
102			`__modsi3 (SItype a, SItype b)`
103			`{`
104			`word_type neg = 0;`
105			`SItype res;`
106
107			`if (a < 0)`
108			`{`
109			`a = -a;`
110			`neg = 1;`
111			`}`
112
113			`if (b < 0)`
114			`b = -b;`
115
116			`res = udivmodsi4 (a, b, 1);`
117
118			`if (neg)`
119			`res = -res;`
120
121			`return res;`
122			`}`
123
124
125
126
127			`SItype`
128			`__udivsi3 (SItype a, SItype b)`
129			`{`
130			`return udivmodsi4 (a, b, 0);`
131			`}`
132
133
134
135			`SItype`
136			`__umodsi3 (SItype a, SItype b)`
137			`{`
138			`return udivmodsi4 (a, b, 1);`
139			`}`

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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [mep/] [lib2funcs.c] - Blame information for rev 737