mirror of
https://github.com/steveicarus/iverilog.git
synced 2026-09-03 06:03:11 +02:00
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.
59 lines
1.0 KiB
Verilog
59 lines
1.0 KiB
Verilog
// Test concatenation inside a constant function
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module constfunc14();
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function [7:0] concat1(input [7:0] value);
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reg [3:0] tmp1;
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reg [3:0] tmp2;
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begin
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{tmp1, tmp2} = {value[3:0], value[7:4]};
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{concat1[3:0], concat1[7:4]} = {tmp2, tmp1};
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end
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endfunction
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function [7:0] concat2(input [7:0] value);
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reg [2:0] tmp1;
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reg [3:0] tmp2;
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begin
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{tmp1, tmp2} = {value[3:0], value[7:4]};
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{concat2[3:0], concat2[7:4]} = {tmp2, tmp1};
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end
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endfunction
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function [7:0] concat3(input [7:0] value);
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reg signed [2:0] tmp1;
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reg signed [2:0] tmp2;
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begin
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{tmp1, tmp2} = {value[2:0], value[6:4]};
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concat3[7:4] = tmp1;
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concat3[3:0] = tmp2;
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end
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endfunction
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localparam res1 = concat1(8'h5a);
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localparam res2 = concat2(8'h5a);
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localparam res3 = concat3(8'h5a);
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reg failed = 0;
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initial begin
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$display("%h", res1); if (res1 !== 8'ha5) failed = 1;
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$display("%h", res2); if (res2 !== 8'ha2) failed = 1;
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$display("%h", res3); if (res3 !== 8'h2d) failed = 1;
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if (failed)
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$display("FAILED");
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else
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$display("PASSED");
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end
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endmodule
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