Re: [myhdl-list] help - hot bit encoder

[Jan C. <jan...@mu...>]

On 05/04/11 03:50, David Blubaugh wrote:
 > Is there anything that I can do to help ??

Yes please!  Run the code attached to my posting. It prints the 
correct result in reversed binary during simulation, but the result 
is not converted back from a signal list to intbv for return.

Hot-bit encoding has just one bit set true at any time. My code 
should convert this back into a simple number, representing the 
position of the set bit.

For a sixteen bit wide input vector, and a four bit output vector 
it produces code the equivalent of this:

  o[3] = i[15]|i[14]|i[13]|i[12]|i[11]|i[10]|i[9]|i[8]
  o[2] = i[15]|i[14]|i[13]|i[12]|i[7]|i[6]|i[5]|i[4]
  o[1] = i[15]|i[14]|i[11]|i[10]|i[7]|i[6]|i[3]|i[2]
  o[0] = i[15]|i[13]|i[11]|i[9]|i[7]|i[5]|i[3]|i[1]

Jan Coombs