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/*===========================================================================*/

/* Copyright (C) 2001 Authors                                                */

/*                                                                           */

/* This source file may be used and distributed without restriction provided */

/* that this copyright statement is not removed from the file and that any   */

/* derivative work contains the original copyright notice and the associated */

/* disclaimer.                                                               */

/*                                                                           */

/* This source file is free software; you can redistribute it and/or modify  */

/* it under the terms of the GNU Lesser General Public License as published  */

/* by the Free Software Foundation; either version 2.1 of the License, or    */

/* (at your option) any later version.                                       */

/*                                                                           */

/* This source is distributed in the hope that it will be useful, but WITHOUT*/

/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or     */

/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public       */

/* License for more details.                                                 */

/*                                                                           */

/* You should have received a copy of the GNU Lesser General Public License  */

/* along with this source; if not, write to the Free Software Foundation,    */

/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA        */

/*                                                                           */

/*===========================================================================*/

/*                          HARDWARE MULTIPLIER                              */

/*---------------------------------------------------------------------------*/

/* Test the hardware multiplier:                                             */

/*                                - MACS mode.                               */

/*                                                                           */

/* Author(s):                                                                */

/*             - Olivier Girard,    olgirard@gmail.com                       */

/*                                                                           */

/*---------------------------------------------------------------------------*/

/* $Rev: 18 $                                                                */

/* $LastChangedBy: olivier.girard $                                          */

/* $LastChangedDate: 2009-08-04 23:44:12 +0200 (Tue, 04 Aug 2009) $          */

/*===========================================================================*/

`define NO_TIMEOUT

integer     i;

reg  signed [31:0] result;

wire signed [15:0] r8_s = r8;

wire signed [15:0] r9_s = r9;

initial

   begin

      $display(" ===============================================");

      $display("|                 START SIMULATION              |");

      $display(" ===============================================");

`ifdef MULTIPLIER

      repeat(5) @(posedge mclk);

      stimulus_done = 0;

      i = 0;

      for ( i=0; i < 'h10000; i=i+1)

        begin

           @(r15);

           result = r8_s*r9_s;

           result = 32'hC000_0000 + result;

           if (r10 !== result[15:0])

             begin

                $display("ERROR: OP1 = 0x%h / OP2 = 0x%h", r8, r9);

                $display("ERROR: Result is: SUMEXT = 0x%h / RESHI = 0x%h / RESLO = 0x%h", r12, r11, r10);

                $display("ERROR: Expected : SUMEXT = 0x%h / RESHI = 0x%h / RESLO = 0x%h", {16{result[31]}}, result[31:16], result[15:0]);

                tb_error("====== SIGNED MULTIPLY ACCUMULATE: RESLO =====");

             end

           if (r11 !== result[31:16])

             begin

                $display("ERROR: OP1 = 0x%h / OP2 = 0x%h", r8, r9);

                $display("ERROR: Result is: SUMEXT = 0x%h / RESHI = 0x%h / RESLO = 0x%h", r12, r11, r10);

                $display("ERROR: Expected : SUMEXT = 0x%h / RESHI = 0x%h / RESLO = 0x%h", {16{result[31]}}, result[31:16], result[15:0]);

                tb_error("====== SIGNED MULTIPLY ACCUMULATE: RESHI =====");

             end

           if (r12 !== {16{result[31]}})

             begin

                $display("ERROR: OP1 = 0x%h / OP2 = 0x%h", r8, r9);

                $display("ERROR: Result is: SUMEXT = 0x%h / RESHI = 0x%h / RESLO = 0x%h", r12, r11, r10);

                $display("ERROR: Expected : SUMEXT = 0x%h / RESHI = 0x%h / RESLO = 0x%h", {16{result[31]}}, result[31:16], result[15:0]);

                tb_error("====== SIGNED MULTIPLY ACCUMULATE: SUMEXT =====");

             end

           if (r15[7:0]==8'h00)

             $display("OP2 = 0x%h done", r9);

        end

      stimulus_done = 1;

`else

       tb_skip_finish("|      (hardware multiplier not included)       |");

`endif

   end