Re: [myhdl-list] fixbv to current version of myhdl

[Henry G. <he...@ca...>]

On 03/05/15 14:49, Jose M. Gomez Cama wrote:
> Being short, resize usually implies just an increment and some checks. So in most cases no pipelining is needed.

Ah yes, I realise I've been misinterpreting what is needed by a resize...

Essentially I need the more general case to be implemented in hardware, 
similar to floating point.

Actually, it really is floating point I need :) (but a distinctly 
restricted type of floating point) - the normalize and count operation. 
That's a count leading zeros, left shift, and then a round to even (or 
whatever rounding scheme).

>
> Or being a bad guy, if we do not parametrise the pipeline for multiply or divide which usually will require pipelining, why shall be done for resize;)

I agree. Any real convertible implementation would have to handle 
multiply and divide as explicit operations. To some extent, the multiply 
can be inferred and can be done in a single clock cycle when DSP slices 
are available, so might still be useful.

You make an important point though.

Cheers,

Henry