mirror of
https://github.com/steveicarus/iverilog.git
synced 2026-09-03 01:13:47 +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.
104 lines
2.4 KiB
Verilog
104 lines
2.4 KiB
Verilog
// Test mixed type/width case expressions inside a constant function
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module constfunc13();
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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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localparam res11 = lookup1(3'sb100);
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localparam res12 = lookup1(3'sb110);
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localparam res13 = lookup1(3'sb010);
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localparam res21 = lookup2(3'sb100);
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localparam res22 = lookup2(3'sb010);
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localparam res23 = lookup2(3'sb110);
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localparam res31 = lookup3( 1.0);
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localparam res32 = lookup3( 2.0);
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localparam res33 = lookup3(-1.0);
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localparam res34 = lookup3( 1.5);
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localparam res41 = lookup4(3'sb110);
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localparam res42 = lookup4(3'sb111);
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localparam res43 = lookup4(3'sb011);
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reg failed = 0;
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initial begin
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$display("case = %d", res11); if (res11 != 2) failed = 1;
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$display("case = %d", res12); if (res12 != 3) failed = 1;
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$display("case = %d", res13); if (res13 != 4) failed = 1;
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$display("");
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$display("case = %d", res21); if (res21 != 2) failed = 1;
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$display("case = %d", res22); if (res22 != 3) failed = 1;
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$display("case = %d", res23); if (res23 != 4) failed = 1;
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$display("");
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$display("case = %d", res31); if (res31 != 1) failed = 1;
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$display("case = %d", res32); if (res32 != 2) failed = 1;
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$display("case = %d", res33); if (res33 != 3) failed = 1;
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$display("case = %d", res34); if (res34 != 4) failed = 1;
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$display("");
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$display("case = %d", res41); if (res41 != 2) failed = 1;
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$display("case = %d", res42); if (res42 != 3) failed = 1;
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$display("case = %d", res43); if (res43 != 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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