xref: /gem5/src/systemc/tests/systemc/datatypes/int/arith/arith08/arith08.cpp

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/*****************************************************************************

  arith08.cpp --

  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15

 *****************************************************************************/

/*****************************************************************************

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

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  Description of Modification:

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#include "systemc.h"
#include "isaac.h"

QTIsaac<8> rng;		// Platform independent random number generator.

#define TEST(A,B) \
{ \
    if ( A != B ) \
        cout << #A << " (" << A << ") != " << #B << "(" << B << ")" << endl; \
}

int
sc_main(int, char**)
{
    unsigned vali[5] = { 0, 1, (unsigned)-1, 7, (unsigned)-8 };
    signed int valj[5] = { 0, 1, -1, 7, -8 };

    for (int i = 3; i < 30; ++i) {
        for (int j = 3; j < 30; ++j) {
            cout << "i = " << i << ", j = " << j << endl;
            sc_unsigned x(i);
            sc_signed y(j);
            sc_signed z(64);

            vali[3] = (1 << (i - 1)) - 1;
            vali[4] = - (1 << (i - 1));

            valj[3] = (1 << (j - 1)) - 1;
            valj[4] = - (1 << (j - 1));

            for (int ii = 0; ii < 100; ++ii) {
                for (int jj = 0; jj < 100; ++jj) {
                    unsigned qi = (ii < 5) ? vali[ii] :
		                             (rng.rand() & ((1 << i) - 1));
                    signed int qj = (jj < 5) ? valj[jj] :
		                               (rng.rand() & ((1 << j) - 1));

                    if (qi & (1 << (i - 1))) {
                        qi = (qi << (32 - i)) >> (32 - i);
                    }
                    if (qj & (1 << (j - 1))) {
                        qj = (qj << (32 - j)) >> (32 - j);
                    }

                    x = qi;
                    y = qj;

                    sc_signed ty(x);
                    TEST(x,ty );
                    sc_assert( ty >= 0 );
                    sc_assert((! x[i-1]) || (ty.length() == i+1) );

                    z = x + y;
                    TEST(static_cast<sc_bigint<32> >( z.range(31,0) ),
			    int(int(qi) + qj) );
                    z = x - y;
                    TEST(static_cast<sc_bigint<32> >( z.range(31,0) ),
			    int(int(qi) - qj) );
                    z = x * y;
                    TEST(static_cast<sc_bigint<32> >( z.range(31,0) ),
			    int(int(qi) * qj) );
                    sc_unsigned xx(i);
                    xx = x;
                    xx *= y;
                    sc_unsigned xx2(i);
                    xx2 = z.range(i - 1, 0);
                    TEST(xx,xx2);

                    if (y != 0) {
                        z = x / y;
                        TEST(static_cast<sc_bigint<32> >( z.range(31,0) ), int(int(qi) / qj) );
                        z = x % y;
                        TEST(static_cast<sc_bigint<32> >( z.range(31,0) ), int(int(qi) % qj) );
                    }
                    z = x & y;
                    TEST(static_cast<sc_bigint<32> >( z.range(31,0) ), int(int(qi) & qj) );
                    z = x | y;
                    TEST(static_cast<sc_bigint<32> >( z.range(31,0) ), int(int(qi) | qj) );
                    z = x ^ y;
                    TEST(static_cast<sc_bigint<32> >( z.range(31,0) ), int(int(qi) ^ qj) );
                }
            }
        }
    }
    return 0;
}