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DPGEN_NAND2MASK(3) Alliance - genlib User's Manual DPGEN_NAND2MASK(3) NAME DPGEN_NAND2MASK - Programmable Mask Macro-Generator SYNOPSIS #include <genlib.h> void GENLIB_MACRO (DPGEN_NAND2MASK, char *modelname, long flags, long N, char *constVal); DESCRIPTION Generate 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 (sup- plied 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 and X"0000FFFF") WHEN '1'; EXAMPLE GENLIB_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 ALSO GENLIB_MACRO(3), genlib(1) ASIM/LIP6 30 July 2004 DPGEN_NAND2MASK(3)
NAME | SYNOPSIS | DESCRIPTION | EXAMPLE | SEE ALSO
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