test.cpp revision 12855:588919e0e4aa 
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21
22  test.cpp --
23
24  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15
25
26 *****************************************************************************/
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37
38/*
39Subject: range() of sc_biguint
40From: "Masahiro Taniguchi" <taniguchi.masahiro@lsi.melco.co.jp>
41Date: Mon, 12 Nov 2001 16:29:04 +0900
42To: "systemc-forum" <systemc-forum@systemc.org>
43
44Hi all,
45
46I found a strange simulation result regarding sc_biguint.
47I attached the example about it.
48The example described 3 case.
49 1. Write non-0
50 2. Write 0 without cast
51 3. Write 0 with cast (sc_biguint<8>)
52The wrong result appears in the 2nd case.
53Is this a bug of SystemC?
54
55-------Environment-------
56 SystemC V1.0.2 and V2.0
57 GCC 2.95.2
58 Sun Solaris
59-------------------------
60
61Regards,
62
63Masahiro Taniguchi
64Mitsubishi Electric Corporation
65JAPAN
66
67------------------------------------------------------------
68*/
69
70#include "systemc.h"
71
72int
73sc_main( int, char*[] )
74{
75    int i;
76    int index0,index1;
77    sc_biguint<128> A;
78    sc_uint<16> B;
79    sc_biguint<128> Y;
80
81    A = 0;
82    Y = 0;
83    cout << "A = " << A.to_string(SC_HEX) << endl;
84    cout << "Y = " << Y.to_string(SC_HEX) << endl << endl;
85
86    // 1st Case
87    A = "0xffffffffffffffffffffffffffffffff";
88    B = 0;
89
90    for(i=15;i>=0;i--)
91    {
92        index0 = 8*(i+1)-1;
93        index1 = 8* i;
94        if(B[i] == 0) {
95            Y.range(index0,index1) = A.range(index0,index1);
96        }
97    }
98
99    cout << "A = " << A.to_string(SC_HEX) << endl;
100    cout << "B = " << hex << B << endl;
101    cout << "Y = " << Y.to_string(SC_HEX) << endl << endl;
102
103    // 2nd Case
104    A = 0;
105    B = 0;
106
107    for(i=15;i>=0;i--)
108    {
109        index0 = 8*(i+1)-1;
110        index1 = 8* i;
111        if(B[i] == 0) {
112            Y.range(index0,index1) = A.range(index0,index1);
113        }
114    }
115
116    cout << "A = " << A.to_string(SC_HEX) << endl;
117    cout << "B = " << hex << B << endl;
118    cout << "Y = " << Y.to_string(SC_HEX) << endl << endl;
119
120    // 3rd Case
121    A = 0;
122    B = 0;
123
124    for(i=15;i>=0;i--)
125    {
126        index0 = 8*(i+1)-1;
127        index1 = 8* i;
128        if(B[i] == 0) {
129            Y.range(index0,index1) = (sc_biguint<8>)A.range(index0,index1);
130        }
131    }
132
133    cout << "A = " << A.to_string(SC_HEX) << endl;
134    cout << "B = " << hex << B << endl;
135    cout << "Y = " << Y.to_string(SC_HEX) << endl << endl;
136
137    return(0);
138}
139