DPGEN_NAND2MASK - Online Linux Manual Page

Section : 3
Updated : 30 July 2004
Source : ASIM/LIP6
Note : Alliance - genlib User's Manual
NAMEDPGEN_NAND2MASK − Programmable Mask Macro-Generator
SYNOPSIS#include <genlib.h> void GENLIB_MACRO (DPGEN_NAND2MASK, char *modelname, long flags, long N, char *constVal);
DESCRIPTIONGenerate a N bits conditionnal NAND mask named modelname​. How it works : •  if the cmd signal is set to ​'0', the mask is NOT applied, so the whole operator behave like an inverter. •  if the cmd signal is set to ​'1', the mask IS applied, the output is the complemented result of the input value ANDed with the mask (supplied 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 operator. A common error is to give a real C constant for the constVal argument. Be aware that it is a character string.
TERMINAL NAMES1.  cmd : mask control (1 bit). 2.  i0 : input (N bits). 3.  q : output (N bits). 4.  vdd : power. 5.  vss : ground.
BEHAVIORnq <= WITH cmd SELECT not(i0) WHEN '0', not(i0 and X"0000FFFF") WHEN '1';
EXAMPLEGENLIB_MACRO(DPGEN_NAND2MASK, "model_nand2mask_0000FFFF_32" , F_BEHAV|F_PLACE , 32 , "0x0000FFFF" /* A string! */ ); GENLIB_LOINS( "model_nand2mask_0000FFFF_32" , "instance1_nand2mask_32" , "cmd" , "i0[31:0]" , "q[31:0]" , "vdd", "vss", NULL );
SEE ALSOGENLIB_MACRO(3), genlib(1) 0
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