Problem about return value of function in SV

[mrforever]

Hi all,

If i want to implement such a reverse function, does anybody have other ways?

function bit[WIDTH-1:0] reverse(int WIDTH, bit[WIDTH-1:0] data);

bit[WIDTH-1:0] data_rvs;

for(int i=0; i<WIDTH; i++

data_rvs = data[WIDTH-1-i];

return data_rvs;

endfunction : reverse

The code above has vcs compile error because of the return value which cann't have variable expression.

[dave_59]

Streaming operator

{<<{expression_to_reverse}}

[adielkhan]

or use SV1800 reverse() array manipulation.

program prog;

parameter WIDTH=16;

bit [WIDTH-1:0] data ;

initial begin

data = 'h5aa5;

$display("%0x",data);

data.reverse();

$display("%0x",data);

end

endprogram

[dave_59]

SV1800 LRM defines array manipulation methods to only work on unpacked arrays. One reason for this is when you have multidimensional array with a mixture of unpacked and packed array dimensions, the manipulation does not apply to the packed dimensions.