| Line 107... |
Line 107... |
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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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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/*
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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[N] = 0;
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alu_status_expected[N] = 0;
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alu_status_expected[Z] = 1;
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alu_status_expected[Z] = 1;
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check();
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check();
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// SED
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// SED
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alu_opcode = SED_IMP;
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alu_opcode = SED_IMP;
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@(negedge clk);
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@(negedge clk);
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alu_status_expected[D] = 1;
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alu_status_expected[D] = 1;
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check();
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check();
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|
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// ADC
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// ADC
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alu_opcode = ADC_IMM;
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alu_opcode = ADC_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
|
alu_a = $random;
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alu_a = $random;
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@(negedge clk);
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@(negedge clk);
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$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], DUT.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], DUT.result);
|
sign = alu_result_expected[7];
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sign = alu_result_expected[7];
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AL = alu_a[3:0];
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AL = alu_a[3:0];
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AH = alu_a[7:4];
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AH = alu_a[7:4];
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BL = alu_result_expected[3:0];
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BL = alu_result_expected[3:0];
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BH = alu_result_expected[7:4];
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BH = alu_result_expected[7:4];
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if ( AL > 9 ) begin
|
if ( AL > 9 ) begin
|
AL = AL - 10;
|
AL = AL - 10;
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AH = AH + 1;
|
AH = AH + 1;
|
end
|
end
|
if (AH > 9) begin
|
if (AH > 9) begin
|
AH = AH - 10;
|
AH = AH - 10;
|
end
|
end
|
if ( BL > 9 ) begin
|
if ( BL > 9 ) begin
|
BL = BL - 10;
|
BL = BL - 10;
|
BH = BH + 1;
|
BH = BH + 1;
|
end
|
end
|
if ( BH > 9 ) begin
|
if ( BH > 9 ) begin
|
BH = BH - 10;
|
BH = BH - 10;
|
end
|
end
|
{C_in,alu_result_expected_temp[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_temp[7:4]} = AH + BH + C_in;
|
{alu_status_expected[C],alu_result_expected[7:4]} = AH + BH + C_in;
|
if ( alu_result_expected_temp[3:0] > 9 ) begin
|
if ( alu_result_expected[3:0] > 9 ) begin
|
alu_result_expected[3:0] = alu_result_expected_temp[3:0] - 10;
|
alu_result_expected[3:0] = alu_result_expected[3:0] - 10;
|
alu_result_expected[7:4] = alu_result_expected_temp[7:4] + 1;
|
alu_result_expected[7:4] = alu_result_expected[7:4] + 1;
|
end
|
end
|
if ( alu_result_expected_temp[7:4] > 9 ) begin
|
if ( alu_result_expected[7:4] > 9 ) begin
|
alu_result_expected[7:4] = alu_result_expected_temp[7:4] - 10;
|
alu_result_expected[7:4] = alu_result_expected[7:4] - 10;
|
end
|
alu_status_expected[C] = 1;
|
alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
|
end
|
alu_status_expected[N] = alu_result_expected[7];
|
alu_status_expected[Z] = (alu_result_expected == 0) ? 1 : 0;
|
alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
|
alu_status_expected[N] = alu_result_expected[7];
|
check();
|
alu_status_expected[V] = ((alu_a[7] == sign) && (alu_a[7] != alu_result_expected[7]));
|
end
|
check();
|
|
end
|
|
*/
|
|
|
// ASL
|
// ASL
|
alu_opcode = ASL_ABS;
|
alu_opcode = ASL_ABS;
|
for (i = 0; i < 1000; i = i + 1)
|
for (i = 0; i < 1000; i = i + 1)
|
begin
|
begin
|
| Line 236... |
Line 237... |
@(negedge clk);
|
@(negedge clk);
|
//$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("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
|
//$display("DUT.A = %h DUT.X = %h DUT.Y = %h", DUT.A, DUT.X, DUT.Y);
|
//$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);
|
//$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);
|
sign = alu_result_expected[7];
|
sign = alu_result_expected[7];
|
{alu_status_expected[C], alu_result_expected} = alu_result_expected - alu_a - ~alu_status_expected[C];
|
{alu_status_expected[C], alu_result_expected} = alu_result_expected - alu_a - ( 1 - alu_status_expected[C]);
|
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];
|
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
|
