How to force Synthesis tool use standard cell library MUX for implementing MUXs

[makanaky]

Hi,

I am using RTL compiler to synthesize a critical path of MUXs, and the tool implements the MUX using gates (NAND, OR ... etc). I am afraid this may increase the path delay while the std cell library contains MUX cells. Is there a way to instruct the tool to use a std cell MUX instead of gates ?

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[sharath666]

Add only the std_cell muxes to your library..

 

[englishdogg]

use map_to_mux attribute or after elaborate map then with required libcells and mark them preserve