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.
122 lines
3.8 KiB
Verilog
122 lines
3.8 KiB
Verilog
// Test case statements inside a constant function
|
|
module constfunc12();
|
|
|
|
function [1:0] onehot_to_binary(input [3:1] x);
|
|
|
|
case (x)
|
|
default : onehot_to_binary = 0;
|
|
3'b001 : onehot_to_binary = 1;
|
|
3'b010 : onehot_to_binary = 2;
|
|
3'b100 : onehot_to_binary = 3;
|
|
endcase
|
|
|
|
endfunction
|
|
|
|
function [1:0] find_first_one(input [3:1] x);
|
|
|
|
casez (x)
|
|
3'b1?? : find_first_one = 3;
|
|
3'b01? : find_first_one = 2;
|
|
3'b001 : find_first_one = 1;
|
|
default : find_first_one = 0;
|
|
endcase
|
|
|
|
endfunction
|
|
|
|
function [1:0] find_first_zero(input [3:1] x);
|
|
|
|
casex (x)
|
|
3'b0zz : find_first_zero = 3;
|
|
3'b10x : find_first_zero = 2;
|
|
3'b110 : find_first_zero = 1;
|
|
default : find_first_zero = 0;
|
|
endcase
|
|
|
|
endfunction
|
|
|
|
function [1:0] match_real_value(input real x);
|
|
|
|
case (x)
|
|
1.0 : match_real_value = 1;
|
|
2.0 : match_real_value = 2;
|
|
3.0 : match_real_value = 3;
|
|
default : match_real_value = 0;
|
|
endcase
|
|
|
|
endfunction
|
|
|
|
localparam otb0 = onehot_to_binary(3'b000);
|
|
localparam otb1 = onehot_to_binary(3'b001);
|
|
localparam otb2 = onehot_to_binary(3'b010);
|
|
localparam otb3 = onehot_to_binary(3'b100);
|
|
localparam otb4 = onehot_to_binary(3'b101);
|
|
localparam otb5 = onehot_to_binary(3'b10z);
|
|
localparam otb6 = onehot_to_binary(3'bx01);
|
|
|
|
localparam ffo0 = find_first_one(3'b000);
|
|
localparam ffo1 = find_first_one(3'b001);
|
|
localparam ffo2 = find_first_one(3'b01x);
|
|
localparam ffo3 = find_first_one(3'b1xx);
|
|
localparam ffo4 = find_first_one(3'bxx1);
|
|
localparam ffo5 = find_first_one(3'b00z);
|
|
localparam ffo6 = find_first_one(3'b0zz);
|
|
localparam ffo7 = find_first_one(3'bzzz);
|
|
|
|
localparam ffz0 = find_first_zero(3'b111);
|
|
localparam ffz1 = find_first_zero(3'b110);
|
|
localparam ffz2 = find_first_zero(3'b10x);
|
|
localparam ffz3 = find_first_zero(3'b0xx);
|
|
localparam ffz4 = find_first_zero(3'bzzz);
|
|
localparam ffz5 = find_first_zero(3'b11x);
|
|
localparam ffz6 = find_first_zero(3'b1xx);
|
|
localparam ffz7 = find_first_zero(3'bxxx);
|
|
|
|
localparam mrv0 = match_real_value(0.0);
|
|
localparam mrv1 = match_real_value(1.0);
|
|
localparam mrv2 = match_real_value(2.0);
|
|
localparam mrv3 = match_real_value(3.0);
|
|
localparam mrv4 = match_real_value(4.0);
|
|
|
|
reg failed = 0;
|
|
|
|
initial begin
|
|
$display("%d", otb0); if (otb0 !== 2'd0) failed = 1;
|
|
$display("%d", otb1); if (otb1 !== 2'd1) failed = 1;
|
|
$display("%d", otb2); if (otb2 !== 2'd2) failed = 1;
|
|
$display("%d", otb3); if (otb3 !== 2'd3) failed = 1;
|
|
$display("%d", otb4); if (otb4 !== 2'd0) failed = 1;
|
|
$display("%d", otb5); if (otb5 !== 2'd0) failed = 1;
|
|
$display("%d", otb6); if (otb6 !== 2'd0) failed = 1;
|
|
$display("");
|
|
$display("%d", ffo0); if (ffo0 !== 2'd0) failed = 1;
|
|
$display("%d", ffo1); if (ffo1 !== 2'd1) failed = 1;
|
|
$display("%d", ffo2); if (ffo2 !== 2'd2) failed = 1;
|
|
$display("%d", ffo3); if (ffo3 !== 2'd3) failed = 1;
|
|
$display("%d", ffo4); if (ffo4 !== 2'd0) failed = 1;
|
|
$display("%d", ffo5); if (ffo5 !== 2'd1) failed = 1;
|
|
$display("%d", ffo6); if (ffo6 !== 2'd2) failed = 1;
|
|
$display("%d", ffo7); if (ffo7 !== 2'd3) failed = 1;
|
|
$display("");
|
|
$display("%d", ffz0); if (ffz0 !== 2'd0) failed = 1;
|
|
$display("%d", ffz1); if (ffz1 !== 2'd1) failed = 1;
|
|
$display("%d", ffz2); if (ffz2 !== 2'd2) failed = 1;
|
|
$display("%d", ffz3); if (ffz3 !== 2'd3) failed = 1;
|
|
$display("%d", ffz4); if (ffz4 !== 2'd3) failed = 1;
|
|
$display("%d", ffz5); if (ffz5 !== 2'd1) failed = 1;
|
|
$display("%d", ffz6); if (ffz6 !== 2'd2) failed = 1;
|
|
$display("%d", ffz7); if (ffz7 !== 2'd3) failed = 1;
|
|
$display("");
|
|
$display("%d", mrv0); if (mrv0 !== 2'd0) failed = 1;
|
|
$display("%d", mrv1); if (mrv1 !== 2'd1) failed = 1;
|
|
$display("%d", mrv2); if (mrv2 !== 2'd2) failed = 1;
|
|
$display("%d", mrv3); if (mrv3 !== 2'd3) failed = 1;
|
|
$display("%d", mrv4); if (mrv4 !== 2'd0) failed = 1;
|
|
$display("");
|
|
if (failed)
|
|
$display("FAILED");
|
|
else
|
|
$display("PASSED");
|
|
end
|
|
|
|
endmodule
|