mirror of
https://github.com/steveicarus/iverilog.git
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Stephen Williams
cea237b407
By adding ivtest to the iverilog source tree, it is easier to keep the regression test synchronized with the source that is being tested. This should be especially helpful for PRs that add a new feature, and have a matching ivtest PR with the regression test for that feature.
109 lines
2.6 KiB
Verilog
109 lines
2.6 KiB
Verilog
module top;
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reg [1:0] a, b, c, d, e;
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reg passed;
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initial begin
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a = 2'b00;
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b = 2'b00;
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c = 2'b00;
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d = 2'b00;
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e = 2'b00;
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passed =1'b1;
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#2;
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// Check that only the first process has run so far.
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if (a !== 2'b01) begin
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$display("First process in named fork has not run: %b", a);
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passed = 1'b0;
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end
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if (b !== 2'b01) begin
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$display("First process in named block has not run: %b", b);
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passed = 1'b0;
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end
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if (c !== 2'b01) begin
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$display("First process in parent ending has not run: %b", c);
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passed = 1'b0;
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end
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if (d !== 2'b01) begin
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$display("First process in parent alive has not run: %b", d);
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passed = 1'b0;
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end
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if (e !== 2'b01) begin
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$display("First process in parent ending (disable) has not run: %b", e);
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passed = 1'b0;
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end
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// This external lexical disable should disable the second process even
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// though the parent has already ended.
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disable top.be_name;
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#2;
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// Check that the second process only runs for the parent ending
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// and alive cases.
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if (a !== 2'b01) begin
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$display("Second process in named fork ran: %b", a);
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passed = 1'b0;
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end
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if (b !== 2'b01) begin
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$display("Second process in named block ran: %b", b);
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passed = 1'b0;
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end
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if (c !== 2'b11) begin
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$display("Second process in parent ending has not run: %b", c);
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passed = 1'b0;
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end
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if (d !== 2'b11) begin
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$display("Second process in parent alive has not run: %b", d);
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passed = 1'b0;
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end
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if (e !== 2'b01) begin
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$display("Second process in parent ending (disable) ran: %b", e);
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passed = 1'b0;
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end
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if (passed) $display("PASSED");
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end
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// Verify that disabling a named fork kills any detached processes.
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initial begin
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fork: fa_name
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#1 a[0] = 1'b1;
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#3 a[1] = 1'b1;
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join_any
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disable fa_name;
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end
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// Verify that disabling a named block kills any detached processes.
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initial begin: bb_name
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fork
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#1 b[0] = 1'b1;
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#3 b[1] = 1'b1;
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join_any
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disable bb_name;
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end
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// Verify that a detached process survives the parent ending.
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initial begin
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fork
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#1 c[0] = 1'b1;
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#3 c[1] = 1'b1;
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join_any
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end
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// Verify that a detached process runs if the parent is still alive.
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initial begin
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fork
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#1 d[0] = 1'b1;
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#3 d[1] = 1'b1;
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join_any
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#4;
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end
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// Verify that a detached process survives the parent ending, but can
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// still be disabled lexically by disabling the block that started it.
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initial begin: be_name
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fork
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#1 e[0] = 1'b1;
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#3 e[1] = 1'b1;
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join_any
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end
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endmodule
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