xref: /gem5/src/systemc/tests/systemc/datatypes/int/arith/arith04/arith04.cpp

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  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
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  (the "License"); you may not use this file except in compliance with the
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  Unless required by applicable law or agreed to in writing, software
  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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/*****************************************************************************

  arith04.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:

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#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));

            for (int ii = 0; ii < 100; ++ii) {
                for (int jj = 0; jj < 100; ++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));
                    signed int tqi;

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

                    x = qi;
                    tqi = 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));

                    x += y;
                    tqi += qj;
                    tqi = (tqi << (32 - i)) >> (32 - i);
                    sc_assert( x == tqi );

                    x = qi;
                    tqi = qi;
                    x -= y;
                    tqi -= qj;
                    tqi = (tqi << (32 - i)) >> (32 - i);
                    sc_assert( x == tqi );

                    x = qi;
                    tqi = qi;
                    x *= y;
                    tqi *= qj;
                    tqi = (tqi << (32 - i)) >> (32 - i);
                    sc_assert( x == tqi );

                    if (y != 0) {
                        x = qi;
                        tqi = qi;
                        x /= y;
                        tqi /= qj;
                        tqi = (tqi << (32 - i)) >> (32 - i);
                        sc_assert( x == tqi );

                        x = qi;
                        tqi = qi;
                        x %= y;
                        tqi %= qj;
                        tqi = (tqi << (32 - i)) >> (32 - i);
                        sc_assert( x == tqi );
                    }

                    x = qi;
                    tqi = qi;
                    x &= y;
                    tqi &= qj;
                    tqi = (tqi << (32 - i)) >> (32 - i);
                    sc_assert( x == tqi );

                    x = qi;
                    tqi = qi;
                    x |= y;
                    tqi |= qj;
                    tqi = (tqi << (32 - i)) >> (32 - i);
                    sc_assert( x == tqi );

                    x = qi;
                    tqi = qi;
                    x ^= y;
                    tqi ^= qj;
                    tqi = (tqi << (32 - i)) >> (32 - i);
                    sc_assert( x == tqi );

                    if (jj < i - 1) {
                        x = qi;
                        tqi = qi;
                        x <<= jj;
                        tqi <<= jj;
                        tqi = (tqi << (32 - i)) >> (32 - i);
                        sc_assert( x == tqi );

                        x = qi;
                        tqi = qi;
                        x >>= jj;
                        tqi >>= jj;
                        tqi = (tqi << (32 - i)) >> (32 - i);
                        sc_assert( x == tqi );
                    }
                }
            }
        }
    }
    return 0;
}