DPGEN_XNOR2MASK 3 ASIM/LIP6 DPGEN_XNOR2MASK Programmable Mask Macro-Generator #include <genlib.h> void GENLIB_MACRO DPGEN_XNOR2MASK char *modelname long flags long N char *constVal Generate a &N; bits conditionnal XNOR mask named &modelname;. How it works : if the &cmd; signal is set to &zero;, the mask is NOT applied, so the whole operator behave like an inverter. if the &cmd; signal is set to &one;, the mask IS applied, the output is the complemented result of the input value XORed with the mask (suplied by &constVal;). The constant &constVal; is given to the macro-generator call, therefore the value cannot be changed afterward : it's hard wired in the operator. A common error is to give a real C constant for the &constVal; argument. Be aware that it is a character string. cmd : mask control (1 bit). i0 : input (&N; bits). q : output (&N; bits). vdd : power. vss : ground. nq <= WITH cmd SELECT not(i0) WHEN '0', not(i0 xor X"0000FFFF") WHEN '1'; GENLIB_MACRO(DPGEN_XNOR2MASK, "model_xnor2mask_0000FFFF_32" , F_BEHAV|F_PLACE , 32 , "0x0000FFFF" /* A string! */ ); GENLIB_LOINS( "model_xnor2mask_0000FFFF_32" , "instance1_xnor2mask_32" , "cmd" , "i0[31:0]" , "q[31:0]" , "vdd", "vss", NULL ); &man-dpgen-see-also;