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.
88 lines
1.9 KiB
Verilog
88 lines
1.9 KiB
Verilog
module mixed_width_case();
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function [2:0] lookup1(input signed [2:0] value);
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begin
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case (value)
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4'sb0100 : lookup1 = 1;
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3'sb100 : lookup1 = 2;
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2'sb10 : lookup1 = 3;
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default : lookup1 = 4;
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endcase
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$display("case = %d", lookup1);
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end
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endfunction
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function [2:0] lookup2(input signed [2:0] value);
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begin
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case (value)
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4'b1100 : lookup2 = 1;
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3'sb100 : lookup2 = 2;
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2'sb10 : lookup2 = 3;
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default : lookup2 = 4;
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endcase
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$display("case = %d", lookup2);
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end
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endfunction
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function [2:0] lookup3(input real value);
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begin
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case (value)
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4'b0001 : lookup3 = 1;
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3'sb010 : lookup3 = 2;
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2'sb11 : lookup3 = 3;
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default : lookup3 = 4;
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endcase
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$display("case = %d", lookup3);
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end
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endfunction
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function [2:0] lookup4(input signed [2:0] value);
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begin
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case (value)
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4'b0110 : lookup4 = 1;
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3'sb110 : lookup4 = 2;
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-1.0 : lookup4 = 3;
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default : lookup4 = 4;
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endcase
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$display("case = %d", lookup4);
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end
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endfunction
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reg [2:0] result;
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reg failed = 0;
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initial begin
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result = lookup1(3'sb100); if ( result != 2) failed = 1;
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result = lookup1(3'sb110); if ( result != 3) failed = 1;
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result = lookup1(3'sb010); if ( result != 4) failed = 1;
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$display("");
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result = lookup2(3'sb100); if ( result != 2) failed = 1;
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result = lookup2(3'sb010); if ( result != 3) failed = 1;
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result = lookup2(3'sb110); if ( result != 4) failed = 1;
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$display("");
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result = lookup3( 1.0); if ( result != 1) failed = 1;
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result = lookup3( 2.0); if ( result != 2) failed = 1;
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result = lookup3(-1.0); if ( result != 3) failed = 1;
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result = lookup3( 1.5); if ( result != 4) failed = 1;
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$display("");
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result = lookup4(3'sb110); if ( result != 2) failed = 1;
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result = lookup4(3'sb111); if ( result != 3) failed = 1;
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result = lookup4(3'sb011); if ( result != 4) failed = 1;
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$display("");
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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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