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


            );

NAME

SYNOPSIS

DESCRIPTION

TERMINAL NAMES

EXAMPLE

SEE ALSO