| Line 17... |
Line 17... |
reg [7:0] alu_result_expected;
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reg [7:0] alu_result_expected;
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reg [7:0] alu_status_expected;
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reg [7:0] alu_status_expected;
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reg [7:0] alu_x_expected;
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reg [7:0] alu_x_expected;
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reg [7:0] alu_y_expected;
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reg [7:0] alu_y_expected;
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reg c_aux;
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reg C_in;
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reg [7:0] temp;
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reg [7:0] temp;
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reg sign;
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reg sign;
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reg [3:0] AL;
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reg [3:0] AH;
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reg [3:0] BL;
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reg [3:0] BH;
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reg [7:0] alu_result_expected_temp;
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t6507lp_alu DUT (
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t6507lp_alu DUT (
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.clk (clk),
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.clk (clk),
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.reset_n (reset_n),
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.reset_n (reset_n),
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.alu_enable (alu_enable),
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.alu_enable (alu_enable),
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| Line 103... |
Line 108... |
alu_status_expected[N] = alu_result_expected[7];
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alu_status_expected[N] = alu_result_expected[7];
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alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
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alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
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check();
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check();
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end
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end
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/* // BCD
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// BCD
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// LDA
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// LDA
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alu_a = 0;
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alu_a = 0;
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alu_opcode = LDA_IMM;
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alu_opcode = LDA_IMM;
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//$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
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//$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
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//$display("op1 = %d op2 = %d c = %d d = %d n = %d v = %d result = %d", alu_a, DUT.A, alu_status[C], alu_status[D], alu_status[N], alu_status[V], alu_result);
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//$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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@(negedge clk);
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@(negedge clk);
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alu_result_expected = 8'h00;
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alu_result_expected = 8'h00;
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// NV1BDIZC
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// NV1BDIZC
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alu_status_expected = 8'b00101010;
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alu_status_expected[N] = 0;
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check();
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alu_status_expected[Z] = 1;
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check();
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// ADC
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// SED
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alu_opcode = ADC_IMM;
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alu_opcode = SED_IMP;
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for (i = 0; i < 1000; i = i + 1)
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@(negedge clk);
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begin
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alu_status_expected[D] = 1;
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alu_a = $random;
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check();
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@(negedge clk);
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//$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
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// ADC
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//$display("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
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alu_opcode = ADC_IMM;
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//$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], DUT.result);
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for (i = 0; i < 1000; i = i + 1)
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sign = alu_result_expected[7];
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begin
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{alu_status_expected[C], alu_result_expected} = alu_a + alu_result_expected + alu_status_expected[C];
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alu_a = $random;
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alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
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@(negedge clk);
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alu_status_expected[N] = alu_result_expected[7];
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$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
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alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
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$display("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
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check();
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$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], DUT.result);
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end
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sign = alu_result_expected[7];
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*/
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AL = alu_a[3:0];
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AH = alu_a[7:4];
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BL = alu_result_expected[3:0];
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BH = alu_result_expected[7:4];
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if ( AL > 9 ) begin
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AL = AL - 10;
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AH = AH + 1;
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end
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if (AH > 9) begin
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AH = AH - 10;
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end
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if ( BL > 9 ) begin
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BL = BL - 10;
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BH = BH + 1;
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end
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if ( BH > 9 ) begin
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BH = BH - 10;
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end
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{C_in,alu_result_expected_temp[3:0]} = AL + BL + alu_status_expected[C];
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{alu_status_expected[C],alu_result_expected_temp[7:4]} = AH + BH + C_in;
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if ( alu_result_expected_temp[3:0] > 9 ) begin
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alu_result_expected[3:0] = alu_result_expected_temp[3:0] - 10;
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alu_result_expected[7:4] = alu_result_expected_temp[7:4] + 1;
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end
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if ( alu_result_expected_temp[7:4] > 9 ) begin
|
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alu_result_expected[7:4] = alu_result_expected_temp[7:4] - 10;
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end
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alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
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alu_status_expected[N] = alu_result_expected[7];
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alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
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check();
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end
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// ASL
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// ASL
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alu_opcode = ASL_ABS;
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alu_opcode = ASL_ABS;
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for (i = 0; i < 1000; i = i + 1)
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for (i = 0; i < 1000; i = i + 1)
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begin
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begin
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