Do the cell libraries used for synthesis contain comparators

[lordsathish]

std cell hdl view

hi everyone...
Do the cell libraries that we use during synthesis contain standard cells for comparators....? i.e when we use comparison operators like <>= in the HDL , will they be replaced by compartor standard cells during synthesis...?

Is it better to design comparator using logic gates or to use the <>= symbols to realise the operations, considering the delay of the module...

Thanks...

 

[rain_181914]

Re: Comparator standard cell

Syhthesis will use designware components to replace hdl code.
if standard cell dont have this comparator, DC tool will transfer corresponding standardcell to replace designware components in optimal situation

 

[Thinkie]

Comparator standard cell

Just use the <>= symbols.
You will waste a lot of time doing your own comparator which will almost certainly be worse than your synthesizer

 

[mohaddin]

Comparator standard cell

Hi

Usually in std cell libraries u dont find comparators, multipliers, carrylookadder etc,
if u r using design complier, then synopsys will provide these components with the dc tool, interms of designware components.

Regards
Mohi