Given a number (bit width, word count, etc...) and a multiple, returns the number of bits/words/etc... padded upwards to the next multiple, if necessary.
This function is useful when you must have things exist as an exact multiple of some minimum size, such as fitting large bit vectors into multiple machine words, or chunks of data into structures of a given size. Use the Word Pad function to calculate the width of the padding, if any.
Pass the function values which, at elaboration time, are either constants or expressions which evaluate to a constant. Then use the return value as an integer for a localparam, genvar, etc...
Since this is an included file, it must be idempotent. (defined only once globally)
`ifndef ADJUST_FUNCTION
`define ADJUST_FUNCTION
function integer adjust_to_multiple;
input integer count;
input integer multiple;
integer remainder;
integer pad;
begin
remainder = count % multiple;
pad = (remainder > 0) ? multiple - remainder : 0;
adjust_to_multiple = count + pad;
end
endfunction
`endif