DPGEN_XNOR2MASK(3)					  Alliance - genlib User's Manual					DPGEN_XNOR2MASK(3)

NAME

       DPGEN_XNOR2MASK - Programmable Mask Macro-Generator

SYNOPSIS

       #include  <genlib.h>

       void GENLIB_MACRO (DPGEN_XNOR2MASK, char *modelname, long flags, long N, char *constVal);

DESCRIPTION

       Generate a N bits conditionnal XNOR mask named modelname.

       How it works :

       o if the cmd signal is set to '0', the mask is NOT applied, so the whole operator behave like an inverter.

       o if  the  cmd  signal  is  set	to  '1', 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 opera-
       tor.

       A common error is to give a real C constant for the constVal argument. Be aware that it is a character string.

   TERMINAL NAMES
       1. cmd : mask control (1 bit).

       2. i0 : input (N bits).

       3. q : output (N bits).

       4. vdd : power.

       5. vss : ground.

   BEHAVIOR
       nq <= WITH cmd SELECT not(i0)		     WHEN '0',
			     not(i0 xor X"0000FFFF") WHEN '1';

EXAMPLE

       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
		   );

SEE ALSO

       GENLIB_MACRO(3), genlib(1)

ASIM
/LIP6							   30 July 2004 						DPGEN_XNOR2MASK(3)