Unconstrained Bit Reverser

The module reverses the logical bit order from i_data to o_data. Both ports are unconstrained: the size is fixed at instantiation.

Behaviour

• o_data must have the same length as i_data;
• the first logical output bit receives the last logical input bit;
• the code must work with both downto and to;
• use attributes ('range, 'length, 'ascending, 'left) instead of hardcoded sizes;
• the circuit is combinational.