| Line 234... |
Line 234... |
alu_opcode = SBC_IMM;
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alu_opcode = SBC_IMM;
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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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alu_a = 1;
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alu_a = 1;
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@(negedge clk);
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@(negedge clk);
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$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
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//$display("i = %d alu_opcode = %h alu_enable = %d", i, alu_opcode, alu_enable);
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$display("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
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//$display("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
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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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sign = alu_result_expected[7];
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sign = alu_result_expected[7];
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{alu_status_expected[C], alu_result_expected} = alu_result_expected - alu_a - ( 1 - alu_status_expected[C]);
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alu_result_expected = alu_result_expected - alu_a - ( 1 - alu_status_expected[C]);
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alu_status_expected[C] = ~alu_result_expected[7];
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alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
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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[N] = alu_result_expected[7];
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$display("alu_a[7] = %b == sign = %b && alu_a[7] = %b != alu_result_expected[7] = %b", alu_a[7], sign, alu_a[7], alu_result_expected[7]);
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//$display("alu_a[7] = %b == sign = %b && alu_a[7] = %b != alu_result_expected[7] = %b", 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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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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// LDA
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// LDA
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