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[/] [t6507lp/] [trunk/] [rtl/] [verilog/] [t6507lp_alu_tb.v] - Diff between revs 184 and 186

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Rev 184 Rev 186
Line 110... Line 110... 
                alu_status_expected[N] = alu_result_expected[7];
 
                alu_status_expected[N] = alu_result_expected[7];
 
                alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
 
                alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
 
                check;
 
                check;
 
        end
 
        end
 
 
 
 
 
 
 
        // CLC
 
 
 
        alu_opcode = CLC_IMP;
 
 
 
        @(negedge clk);
 
 
 
        alu_status_expected[C] = 0;
 
 
 
        check;
 
 
 
 
 
 
 
        // SED
 
 
 
        alu_opcode = SED_IMP;
 
 
 
        //$display("A = %h B = %h X = %h Y = %h", alu_result, alu_a, alu_x, alu_y);
 
 
 
        @(negedge clk);
 
 
 
        alu_status_expected[D] = 1;
 
 
 
        check;
 
 
 
        //Corner Case 12 + 88 decimal mode
 
 
 
        // LDA
 
 
 
        alu_a = 8'h88;
 
 
 
        alu_opcode = LDA_IMM;
 
 
 
        @(negedge clk);
 
 
 
        alu_result_expected = 8'h88;
 
 
 
        alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
 
 
 
        alu_status_expected[N] = alu_result_expected[7];
 
 
 
        check;
 
 
 
 
 
 
 
        // ADC
 
 
 
        alu_opcode = ADC_IMM;
 
 
 
        alu_a = 8'h12;
 
 
 
        $display("A = %h B = %h X = %h Y = %h", alu_result, alu_a, alu_x, alu_y);
 
 
 
        @(negedge clk);
 
 
 
        sign = alu_result_expected[7];
 
 
 
        AL = alu_a[3:0] + alu_result_expected[3:0] + alu_status_expected[C];
 
 
 
        $display("AL = %b", AL);
 
 
 
        AH = alu_a[7:4] + alu_result_expected[7:4] + AL[4];
 
 
 
        $display("AH = %b", AH);
 
 
 
        if (AL > 9) begin
 
 
 
          temp1 = AL - 6;
 
 
 
        end
 
 
 
        else begin
 
 
 
          temp1 = AL;
 
 
 
        end
 
 
 
        $display("temp1 = %b", temp1);
 
 
 
        alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
 
 
 
        alu_status_expected[N] = alu_result_expected[7];
 
 
 
        alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
 
 
 
        if (AH > 9) begin
 
 
 
          temp2 = AH - 6;
 
 
 
        end
 
 
 
        else begin
 
 
 
          temp2 = AH;
 
 
 
        end
 
 
 
        $display("temp2 = %b", temp2);
 
 
 
        alu_status_expected[C] = (temp2 > 15) ? 1 : 0;
 
 
 
        alu_result_expected = {temp2[3:0],temp1[3:0]};
 
 
 
        $display("A = %b PS = %b", alu_result_expected, alu_status_expected);
 
 
 
        check;
 
 
 
 
 
 
 
        // CLD
 
 
 
        alu_opcode = CLD_IMP;
 
 
 
        @(negedge clk);
 
 
 
        alu_status_expected[D] = 0;
 
 
 
        check;
 
 
 
        $stop;
 
        // BCD
 
        // BCD
 
        // LDA
 
        // LDA
 
        alu_a = 0;
 
        alu_a = 0;
 
        alu_opcode = LDA_IMM;
 
        alu_opcode = LDA_IMM;
 
        //$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
 
        //$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
Line 136... Line 196... 
        for (i = 0; i < 1000; i = i + 1)
 
        for (i = 0; i < 1000; i = i + 1)
 
        begin
 
        begin
 
                alu_a = $random;
 
                alu_a = $random;
 
                //$display("A = %h B = %h C = %b X = %h Y = %h", alu_result, alu_a, alu_status_expected[C], alu_x, alu_y);
 
                //$display("A = %h B = %h C = %b X = %h Y = %h", alu_result, alu_a, alu_status_expected[C], alu_x, alu_y);
 
                @(negedge clk);
 
                @(negedge clk);
 
                C_temp = 0;
 
                AL = alu_result_expected[3:0] + alu_a[3:0] + alu_status_expected[C];
 
                sign = alu_result_expected[7];
 
                AH = alu_result_expected[7:4] + alu_a[7:4] + AL[4];
 
                AL = alu_a[3:0];
 
                if (AL > 9) AL = AL + 6;
 
                AH = alu_a[7:4];
 
                if (AH > 9) AH = AH + 6;
 
                BL = alu_result_expected[3:0];
 
                alu_status_expected[C] = AH[4];
 
                BH = alu_result_expected[7:4];
 
                alu_result_expected = {AH[3:0],AL[3:0]};
 
 
 
                //C_temp = 0;
 
 
 
                //sign = alu_result_expected[7];
 
 
 
                //AL = alu_a[3:0];
 
 
 
                //AH = alu_a[7:4];
 
 
 
                //BL = alu_result_expected[3:0];
 
 
 
                //BH = alu_result_expected[7:4];
 
                /*
 
                /*
 
                if (AL > 9) begin
 
                if (AL > 9) begin
 
                        AL = AL - 10;
 
                        AL = AL - 10;
 
                        AH = AH + 1;
 
                        AH = AH + 1;
 
                end
 
                end
Line 161... Line 227... 
                        BH = BH - 10;
 
                        BH = BH - 10;
 
                        C_temp = 1;
 
                        C_temp = 1;
 
                end
 
                end
 
                */
 
                */
 
                //$display("AL = %h BL = %h", AL, BL, );
 
                //$display("AL = %h BL = %h", AL, BL, );
 
                temp1 = AL + BL + alu_status_expected[C];
 
                //temp1 = AL + BL + alu_status_expected[C];
 
                //AH = A[7:4] + alu_a[7:4];
 
                //AH = A[7:4] + alu_a[7:4];
 
                temp2 = AH + BH;
 
                //temp2 = AH + BH + temp1[4];
 
                //$display("temp1 = %h temp2 = %h", temp1, temp2);
 
                //$display("temp1 = %h temp2 = %h", temp1, temp2);
 
                if (temp1 > 9) begin
 
                //if (temp1 > 9) begin
 
                        temp2 = temp2 + (temp1 / 10);
 
                //      temp2 = temp2 + (temp1 / 10);
 
                        temp1 = temp1 % 10;
 
        //              temp1 = temp1 % 10;
 
                end
 
                //end
 
                if (temp2 > 9) begin
 
                //if (temp2 > 9) begin
 
                        alu_status_expected[C] = 1;
 
                //      alu_status_expected[C] = 1;
 
                        temp2 = temp2 % 10;
 
                //      temp2 = temp2 % 10;
 
                end
 
                //end
 
                else begin
 
                //else begin
 
                        alu_status_expected[C] = 0;
 
                //      alu_status_expected[C] = 0;
 
                end
 
                //end
 
                //$display("bcdh2 = %d", bcdh2);
 
                //$display("bcdh2 = %d", bcdh2);
 
                //$display("bcdl = %d", bcdl);
 
                //$display("bcdl = %d", bcdl);
 
                alu_result_expected = {temp2[3:0],temp1[3:0]};
 
                //alu_result_expected = {temp2[3:0],temp1[3:0]};
 
                //{C_in,alu_result_expected[3:0]} = AL + BL + alu_status_expected[C];
 
                //{C_in,alu_result_expected[3:0]} = AL + BL + alu_status_expected[C];
 
                //{alu_status_expected[C],alu_result_expected[7:4]} = AH + BH + C_in;
 
                //{alu_status_expected[C],alu_result_expected[7:4]} = AH + BH + C_in;
 
                //if ( alu_result_expected[3:0] > 9 ) begin
 
                //if ( alu_result_expected[3:0] > 9 ) begin
 
                //      alu_result_expected[3:0] = alu_result_expected[3:0] - 10;
 
                //      alu_result_expected[3:0] = alu_result_expected[3:0] - 10;
 
        //              alu_result_expected[7:4] = alu_result_expected[7:4] + 1;
 
        //              alu_result_expected[7:4] = alu_result_expected[7:4] + 1;
Line 292... Line 358... 
                alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
 
                alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
 
                alu_status_expected[N] = alu_result_expected[7];
 
                alu_status_expected[N] = alu_result_expected[7];
 
                check;
 
                check;
 
        end
 
        end
 
 
 
 
 
 
 
        // ROL
 
 
 
        alu_opcode = ROL_ABS;
 
 
 
        for (i = 0; i < 1000; i = i + 1)
 
 
 
        begin
 
 
 
                alu_a = i;
 
 
 
                $display("A = %b", alu_a);
 
 
 
                @(negedge clk);
 
 
 
                //$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
 
 
 
                //$display("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
 
 
 
                //$display("op1 = %d op2 = %d  c = %d d = %d n = %d v = %d result = %d", alu_a, DUT.A, alu_status[C], alu_status[D], alu_status[N], alu_status[V], alu_result);
 
 
 
                {alu_status_expected[C], alu_result_expected} = {alu_a,alu_status_expected[C]};
 
 
 
                $display("R = %b", alu_result);
 
 
 
                alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
 
 
 
                alu_status_expected[N] = alu_result_expected[7];
 
 
 
                check;
 
 
 
        end
 
 
 
 
 
 
 
        // ROR
 
 
 
        alu_opcode = ROR_ABS;
 
 
 
        for (i = 0; i < 1000; i = i + 1)
 
 
 
        begin
 
 
 
                alu_a = i;
 
 
 
                $display("A = %b", alu_a);
 
 
 
                @(negedge clk);
 
 
 
                //$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
 
 
 
                //$display("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
 
 
 
                //$display("op1 = %d op2 = %d  c = %d d = %d n = %d v = %d result = %d", alu_a, DUT.A, alu_status[C], alu_status[D], alu_status[N], alu_status[V], alu_result);
 
 
 
                {alu_result_expected, alu_status_expected[C]} = {alu_status_expected[C],alu_a};
 
 
 
                $display("R = %b", alu_result);
 
 
 
                alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
 
 
 
                alu_status_expected[N] = alu_result_expected[7];
 
 
 
                check;
 
 
 
        end
 
 
 
 
 
        // LDA
 
        // LDA
 
        alu_a = 137;
 
        alu_a = 137;
 
        alu_opcode = LDA_IMM;
 
        alu_opcode = LDA_IMM;
 
    //$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
 
    //$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
 
        //$display("op1 = %d op2 = %d  c = %d d = %d n = %d v = %d result = %d", alu_a, DUT.A, alu_status[C], alu_status[D], alu_status[N], alu_status[V], alu_result);
 
        //$display("op1 = %d op2 = %d  c = %d d = %d n = %d v = %d result = %d", alu_a, DUT.A, alu_status[C], alu_status[D], alu_status[N], alu_status[V], alu_result);

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