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| /***************************************************************************** |
| |
| test.cpp -- |
| |
| Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| MODIFICATION LOG - modifiers, enter your name, affiliation, date and |
| changes you are making here. |
| |
| Name, Affiliation, Date: |
| Description of Modification: |
| |
| *****************************************************************************/ |
| |
| /* |
| Subject: range() of sc_biguint |
| From: "Masahiro Taniguchi" <taniguchi.masahiro@lsi.melco.co.jp> |
| Date: Mon, 12 Nov 2001 16:29:04 +0900 |
| To: "systemc-forum" <systemc-forum@systemc.org> |
| |
| Hi all, |
| |
| I found a strange simulation result regarding sc_biguint. |
| I attached the example about it. |
| The example described 3 case. |
| 1. Write non-0 |
| 2. Write 0 without cast |
| 3. Write 0 with cast (sc_biguint<8>) |
| The wrong result appears in the 2nd case. |
| Is this a bug of SystemC? |
| |
| -------Environment------- |
| SystemC V1.0.2 and V2.0 |
| GCC 2.95.2 |
| Sun Solaris |
| ------------------------- |
| |
| Regards, |
| |
| Masahiro Taniguchi |
| Mitsubishi Electric Corporation |
| JAPAN |
| |
| ------------------------------------------------------------ |
| */ |
| |
| #include "systemc.h" |
| |
| int |
| sc_main( int, char*[] ) |
| { |
| int i; |
| int index0,index1; |
| sc_biguint<128> A; |
| sc_uint<16> B; |
| sc_biguint<128> Y; |
| |
| A = 0; |
| Y = 0; |
| cout << "A = " << A.to_string(SC_HEX) << endl; |
| cout << "Y = " << Y.to_string(SC_HEX) << endl << endl; |
| |
| // 1st Case |
| A = "0xffffffffffffffffffffffffffffffff"; |
| B = 0; |
| |
| for(i=15;i>=0;i--) |
| { |
| index0 = 8*(i+1)-1; |
| index1 = 8* i; |
| if(B[i] == 0) { |
| Y.range(index0,index1) = A.range(index0,index1); |
| } |
| } |
| |
| cout << "A = " << A.to_string(SC_HEX) << endl; |
| cout << "B = " << hex << B << endl; |
| cout << "Y = " << Y.to_string(SC_HEX) << endl << endl; |
| |
| // 2nd Case |
| A = 0; |
| B = 0; |
| |
| for(i=15;i>=0;i--) |
| { |
| index0 = 8*(i+1)-1; |
| index1 = 8* i; |
| if(B[i] == 0) { |
| Y.range(index0,index1) = A.range(index0,index1); |
| } |
| } |
| |
| cout << "A = " << A.to_string(SC_HEX) << endl; |
| cout << "B = " << hex << B << endl; |
| cout << "Y = " << Y.to_string(SC_HEX) << endl << endl; |
| |
| // 3rd Case |
| A = 0; |
| B = 0; |
| |
| for(i=15;i>=0;i--) |
| { |
| index0 = 8*(i+1)-1; |
| index1 = 8* i; |
| if(B[i] == 0) { |
| Y.range(index0,index1) = (sc_biguint<8>)A.range(index0,index1); |
| } |
| } |
| |
| cout << "A = " << A.to_string(SC_HEX) << endl; |
| cout << "B = " << hex << B << endl; |
| cout << "Y = " << Y.to_string(SC_HEX) << endl << endl; |
| |
| return(0); |
| } |