xref: /gem5/src/systemc/tests/systemc/misc/examples/a2901/a2901_edge.cpp

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  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
  more contributor license agreements.  See the NOTICE file distributed
  with this work for additional information regarding copyright ownership.
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  (the "License"); you may not use this file except in compliance with the
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    http://www.apache.org/licenses/LICENSE-2.0

  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
  permissions and limitations under the License.

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

  a2901_edge.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 "a2901_edge.h"


void
a2901_edge::entry()
{
    i86 = I.read().range(8,6);
    i87 = I.read().range(8,7);
    q31 = Q.read().range(3,1);
    q20 = Q.read().range(2,0);
    f31 = F.read().range(3,1);

    switch ((int)i87) {
    case 0:
	RAM[Badd.read()] = RAM[Badd.read()];
	break;
    case 1:
	RAM[Badd.read()] = F.read();
	break;
    case 2:
	RAM[Badd.read()] = (RAM3.read(),f31);
	break;
    case 3:
	RAM[Badd.read()] = (f20, RAM0.read());
	break;
    }

#if SUN_HAS_FIXED_THIS_BUG_IN_SC62
    Q.write( (i86 == 0x0) ? F.read() :
	     (i86 == 0x4) ? sc_uint<4>((Q3.read(),q31)) :
	     (i86 == 0x6) ? sc_uint<4>((q20,Q0.read())) :
	     Q.read());
#else
    if( i86 == 0x0 ) {
        Q.write( F.read() );
    } else if( i86 == 0x4 ) {
        Q.write( ( Q3.read(), q31 ) );
    } else if( i86 == 0x6 ) {
        Q.write( ( q20, Q0.read() ) );
    } else {
        Q.write( Q.read() );
    }
#endif
}