NAME

       DPGEN_ADSB2F - Adder/Substractor Macro-Generator

SYNOPSIS

       #include  <genlib.h>

       void GENLIB_MACRO (DPGEN_ADSB2F, char *modelname, long flags, long N);

DESCRIPTION

       Generate a N bits adder/substractor named modelname.

       How it works :

       • if  the  add_sub  signal  is  set  to  '0'  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.

   TERMINAL NAMES
       1. add_sub : select addition or substraction (input, 1 bit).

       2. c31 : carry out. In unsigned mode, this is the overflow (output, 1 bits).

       3. c30  :  used  to  compute  overflow in signed mode : overflow := c31 xor c30 (output, 1
          bits).

       4. i1 : first operand (input, N bits).

       5. i0 : second operand (input, N bits).

       6. q : output (N bits).

       7. vdd : power.

       8. vss : ground.

EXAMPLE

       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
                   );

SEE ALSO

       GENLIB_MACRO(3), genlib(1)