bubble.h

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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.
  Accellera licenses this file to you under the Apache License, Version 2.0
  (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
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/*****************************************************************************
 
  bubble.h -- 
 
  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:
 
 *****************************************************************************/
 
/******************************************************************************/
/***************************   bubble Class Definition     ********************/
/******************************************************************************/
 
#include "common.h"
 
SC_MODULE( BUBBLE )
{
    SC_HAS_PROCESS( BUBBLE );
 
    sc_in_clk clk;
 
    const sc_signal<bool>&      reset;
    const sc_signal<bool>&      in_ok;
    const sc_signal<bool>&      out_ok;
          sc_signal<bool>&      instrb;
          sc_signal<bool>&      outstrb;
    const signal_bool_vector    &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8;// -128 to 127
          signal_bool_vector    &d1,&d2,&d3,&d4,&d5,&d6,&d7,&d8;// -128 to 127
 
    BUBBLE(     sc_module_name                  NAME,
                      sc_clock&                 TICK_P,
                const sc_signal<bool>&          RESET,
                const sc_signal<bool>&          IN_OK,
                const sc_signal<bool>&          OUT_OK,
                      sc_signal<bool>&          INSTRB,
                      sc_signal<bool>&          OUTSTRB,
                const signal_bool_vector&       A1,
                const signal_bool_vector&       A2,
                const signal_bool_vector&       A3,
                const signal_bool_vector&       A4,
                const signal_bool_vector&       A5,
                const signal_bool_vector&       A6,
                const signal_bool_vector&       A7,
                const signal_bool_vector&       A8,
                      signal_bool_vector&       D1,
                      signal_bool_vector&       D2,
                      signal_bool_vector&       D3,
                      signal_bool_vector&       D4,
                      signal_bool_vector&       D5,
                      signal_bool_vector&       D6,
                      signal_bool_vector&       D7,
                      signal_bool_vector&       D8      
              ) 
        :
                reset   (RESET),
                in_ok   (IN_OK),
                out_ok  (OUT_OK),
                instrb  (INSTRB),
                outstrb (OUTSTRB),
                a1      (A1), a2(A2), a3(A3), a4(A4),
                a5      (A5), a6(A6), a7(A7), a8(A8),
                d1      (D1), d2(D2), d3(D3), d4(D4),
                d5      (D5), d6(D6), d7(D7), d8(D8)
    {
        clk(TICK_P); 
        SC_CTHREAD( entry, clk.pos() );
        reset_signal_is(reset,true);
    }
    void entry();
};
 
/******************************************************************************/
/***************************   bubble Entry Function     **********************/
/******************************************************************************/
/******************************************************************************/
void
BUBBLE::entry()
{
  bool_vector B[9];
  bool_vector C[9];
  int                   minel; 
  int                   x; 
  int                   i;
  int                   j;
 
// RESET INITIALIZATION
 
  while(true) {
 
    instrb.write(false);
    outstrb.write(false);
    minel = -500;
    x = 0;
    d1.write(0);
    d2.write(0);
    d3.write(0);
    d4.write(0);
    d5.write(0);
    d6.write(0);
    d7.write(0);
    d8.write(0);
    for (i = 1; i <= 8; i++) {
        B[i] = 0;
    }
    for (i = 1; i <= 8; i++) {
        C[i] = 0;
    }
    wait(); 
 
// READY SIGNAL FOR INPUT DATA
 
    wait(); 
    instrb.write(true);
    wait(); 
 
// INPUT HANDSHAKE & INPUT READ
 
    do { wait(); } while (!in_ok);
 
    instrb.write(false);
    wait();
 
    B[1] = a1.read(); B[2] = a2.read(); B[3] = a3.read(); B[4] = a4.read();     
    B[5] = a5.read(); B[6] = a6.read(); B[7] = a7.read(); B[8] = a8.read();     
    wait();
 
lout << "STARTING BUBBLE SORT" << endl;
// BUBBLE SORT ALGORITHM
 
    // EVERY ELEMENT
    for (i = 1; i <= 7; i++) {
 
      if (B[i].to_int() > B[i+1].to_int()) {    // if #1 
         for (j = 1; j <= 8; j++) {
           C[j] = B[j];                                 // COPY
         } 
 
         B[i] = B[i+1];
         B[i+1] = C[i];
         minel = C[i].to_int();                         // MOVE
 
         for (j = 1; j <= 8; j++) {
           C[j] = B[j];                                 // COPY
         } 
 
         if (i >= 2) {  // if #2
            x = i;
            while (x > 1) {
              if (B[x].to_int() > B[x-1].to_int()) {  
                  break;
              }
              else {
                  for (j = 1; j <= 8; j++) {
                    C[j] = B[j]; 
                  }
              
                  B[x] = B[x-1];
                  B[x-1] = C[x];                        // MOVE
 
                  for (j = 1; j <= 8; j++) {
                    C[j] = B[j];                        // COPY
                  }
              }  // end else
              x = x-1;
            }  //  end WHL Loop
         }  // end if #2
      }  // end if #1;
    }  // end FL3 Loop
    wait();
    
// WRITE OUTPUT & OUTPUT HANDSHAKE
 
    d1.write(C[1]); d2.write(C[2]); d3.write(C[3]); d4.write(C[4]);
    d5.write(C[5]); d6.write(C[6]); d7.write(C[7]); d8.write(C[8]);
    outstrb.write(true);        // Ready to give output data
    wait();
   
    do { wait(); } while (!out_ok); 
 
    outstrb.write(false);
    wait();
 
  }  // end Reset Loop
 
}