Mercurial > hg > CbC > CbC_gcc

comparison gcc/config/mep/mep-lib2.c @ 55:77e2b8dfacca gcc-4.4.5

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update it from 4.4.3 to 4.5.0
author ryoma <e075725@ie.u-ryukyu.ac.jp>
date Fri, 12 Feb 2010 23:39:51 +0900
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52:c156f1bd5cd9 55:77e2b8dfacca
1 /* 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 }