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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