DPGEN_ADSB2F 3 ASIM/LIP6 DPGEN_ADSB2F Adder/Substractor Macro-Generator #include <genlib.h> void GENLIB_MACRO DPGEN_ADSB2F char *modelname long flags long N Generate a &N; bits adder/substractor named &modelname;. How it works : if the &add-sub; signal is set to &zero; an addition is performed, otherwise it's a substraction. Operation can be either signed or unsigned. In unsigned mode &c31; is the overflow, in unsigned mode you have to compute overflow by XORing &c31; and &c30;. &add-sub; : select addition or substraction (input, 1 bit). &c31; : carry out. In unsigned mode, this is the overflow (output, 1 bits). &c30; : used to compute overflow in signed mode : overflow := c31 xor c30 (output, 1 bits). &i1; : first operand (input, &N; bits). &i0; : second operand (input, &N; bits). &q; : output (&N; bits). vdd : power. vss : ground. GENLIB_MACRO(DPGEN_ADSB2F, "model_adsb2f_32" , F_BEHAV|F_PLACE , 32 ); GENLIB_LOINS( "model_adsb2f_32" , "instance1_adsb2f_32" , "add_sub" , "c32" , "c31" , "i1[31:0]" , "i0[31:0]" , "q[31:0]" , "vdd", "vss", NULL ); &man-dpgen-see-also;