xref: /gem5/src/systemc/tests/systemc/datatypes/int/arith/arith02/arith02.cpp

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  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
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  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  implied.  See the License for the specific language governing
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/*****************************************************************************

  arith02.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:

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

#include <stdlib.h>
#include "systemc.h"
#include "isaac.h"

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

void
check_string( const sc_signed& z, int v )
{
    std::string buf(z.to_string( SC_BIN ) );
    if (z < 0) {
        sc_assert(buf[2] == '1');
    } else {
        sc_assert(buf[2] == '0');
    }
}

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

    for (int i = 3; i < 32; ++i) {
        for (int j = 3; j < 32; ++j) {
            cout << "i = " << i << ", j = " << j << endl;

            sc_signed 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));

	/*
			// old code - takes too much time.
            for (int ii = 0; ii < 100; ++ii) {
                for (int jj = 0; jj < 100; ++jj) {
	*/
            for (int ii = 0; ii < 10; ++ii) {
                for (int jj = 0; jj < 10; ++jj) {
                    signed int 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;
                    sc_assert( x == qi );
                    y = qj;
                    sc_assert( y == qj );
                    sc_assert((x == qj) == (qi == qj));
                    sc_assert((x == qj) == (qj == x));
                    sc_assert((x != qj) == (qi != qj));
                    sc_assert((x != qj) == (qj != x));
                    sc_assert((x < qj) == (qi < qj));
                    sc_assert((x < qj) == (qj > x));
                    sc_assert((x <= qj) == (qi <= qj));
                    sc_assert((x <= qj) == (qj >= x));
                    sc_assert((x > qj) == (qi > qj));
                    sc_assert((x > qj) == (qj < x));
                    sc_assert((x >= qj) == (qi >= qj));
                    sc_assert((x >= qj) == (qj <= x));
                    z = x + y;
                    sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
                            (qi + qj) );
                    check_string( z, qi + qj );
                    z = x - y;
                    sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
			    (qi - qj) );
                    check_string( z, qi - qj );
                    z = x * y;
                    sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
			    (qi * qj) );
                    check_string( z, qi * qj );
                    if (y != 0) {
                        z = x / y;
                        sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
				(qi / qj) );
                        check_string( z, qi / qj );
                        z = x % y;
                        sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
				(qi % qj) );
                        check_string( z, qi % qj );
                    }
                    z = x & y;
                    sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
			    (qi & qj) );
                    check_string( z, qi & qj );
                    z = x | y;
                    sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
			    (qi | qj) );
                    check_string( z, qi | qj );
                    z = x ^ y;
                    sc_assert( static_cast<sc_bigint<32> >( z.range(31,0) ) ==
			    (qi ^ qj) );
                    check_string( z, qi ^ qj );
                    if (jj < i - 1) {
                        z = x << jj;
                        for (int r = 0; r < i; ++r) {
                            sc_assert( (bool) z[r] == !!((qi << jj) & (1 << r)) );
                        }
                        z = x >> jj;
                        for (int r = 0; r < i; ++r) {
                            sc_assert( (bool) z[r] == !!((qi >> jj) & (1 << r)) );
                        }
                    }
                }
            }
        }
    }
    return 0;
}