xref: /gem5/src/systemc/tests/systemc/misc/stars/star103832/star103832.cpp

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

  star103832.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 <systemc.h>

struct test : sc_module {

  sc_in<bool> reset;
  sc_in_clk clk;
  sc_in<sc_uint<8> >  dati;
  sc_out<sc_uint<8> >  dato;
  sc_out<bool> done;

  SC_HAS_PROCESS( test );

  test (const char *NAME) : sc_module(NAME) {
    SC_CTHREAD( reset_loop, clk.pos() );
    reset_signal_is(reset,true);
    end_module();
  }

  void tc_mult_8x8(sc_uint<8> A, sc_uint<8> B, sc_uint<16>& Y);
  void reset_loop();
};

void test::tc_mult_8x8(sc_uint<8> A, sc_uint<8> B, sc_uint<16>& Z) {
  sc_uint<8> MantA;
  sc_uint<16> MantC;
  sc_uint<1> SignC, SignA, SignB;
  sc_uint<8> MantB;
  if (A == 0 || B == 0) {
    Z = 0;
  } else {
    SignA = A[7];
    SignB = B[7];
    MantA = SignA ? sc_uint<8>(0 - A) : A;
    MantB = SignB ? sc_uint<8>(0 - B) : B;
    MantC = MantA *  MantB;
    SignC = SignA ^ SignB;
    MantC = SignC ? sc_uint<16>(0 - MantC) : MantC;
    Z = (SignC, MantC.range(14,0));
  }
}

void test::reset_loop() {
  sc_uint<16> tmp;
  sc_uint<8> inp;
  done = 0;
  dato = 0;
  tmp = 0;
  wait();
  operational_loop : while (1 != 0) {
    inp = dati.read();
    wait();
    tc_mult_8x8( inp, -2, tmp);
    wait();
    done_loop: while (1) {
      dato = tmp;
      done = 1;
      wait();
    }
  }
}