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)