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|
module autoconstant_gooch
(/*AUTOARG*/
// Outputs
out1, out2, out3,
// Inputs
in1, in2, in3
);
input [3:0] in1;
input [3:0] in2;
input [3:0] in3;
output [3:0] out1;
reg [3:0] out1;
output [3:0] out2;
reg [3:0] out2;
output [3:0] out3;
reg [3:0] out3;
always @(/*AUTOSENSE*/in1 or in2 or in3)
begin
case (in1)
4'b0001 : begin
out1 = in2;
end
4'b0010 : begin
out1 = in2 + in3;
end
4'b0100 : begin
out1 = in2 - in3;
end
4'b1000 : begin
out1 = in2;
end
default : begin
out1 = {4{1'b0}};
end
endcase
end
always @(/*AUTOSENSE*/in1 or in2 or in3)
begin
case (in1)
4'b0001 : begin
out2 = in2;
end
4'b0010 : begin
out2 = in2 + in3;
end
4'b0100 : begin
out2 = in2 - in3;
end
4'b1000 : begin
out2 = in2;
end
default : begin
out2 = {4{1'b0}};
end
endcase
end
always @(/*AUTOSENSE*/in1 or in2 or in3)
begin
/* AUTO_CONSTANT( temp )*/
/* AxxxUTO_CONSTANT temp */
out3 = in1 + in2;
temp2 = temp;
// ERROR here - above constant definition is not
// correct - no braces - and so parser keeps looking
// for the first variable it finds between a pair of
// braces - in this case, in2. This in2 is now a
// "constant" and is removed from all sensitivity lists.
// ( in2 )
case (in1)
4'b0001 : begin
out3 = in2;
end
4'b0010 : begin
out3 = in2 + in3;
end
4'b0100 : begin
out3 = in2 - in3;
end
4'b1000 : begin
out3 = in2;
end
default : begin
out3 = {4{1'b0}};
end
endcase
end
endmodule
|
