DPGEN_NAND2MASK(3)

💅 DPGEN_NAND2MASK 💅

okay bestie, welcome to the Alliance genlib corner of the manual, section 3. This one's called DPGEN_NAND2MASK and it's literally the Programmable Mask Macro-Generator</> — no cap, that's its whole name. Let's get into it. 🎀

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✨ SYNOPSIS ✨

like, this is how you even call it:

#include  <genlib.h>

void GENLIB_MACRO (DPGEN_NAND2MASK, char *modelname, long flags, long N,
char *constVal);

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🌸 DESCRIPTION 🌸

It generates an N bits conditionnal NAND mask named modelname. Yes, "conditionnal" with two n's, that's how the original spells it, we respect the source. 💖

Now the way this thing actually works, because it's giving ✨logic gate lore✨:

• 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, and 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. It is what it is, it's permanent, it's committed. 🔒

⚠️ A common error is to give a real C constant for the constVal argument. Be aware that it is a character string. Like, it looks like a number bestie but it is a STRING. Do not be fooled. 😭

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🔌 TERMINAL NAMES 🔌

1. cmd : mask control (1 bit). 🎮
2. i0 : input (N bits). 📥
3. q : output (N bits). 📤
4. vdd : power. ⚡
5. vss : ground. 🌍

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🧠 BEHAVIOR 🧠

here's the vibe in literal code form, verbatim, don't touch it:

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

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🔥 EXAMPLE 🔥

look at this absolute serve of a call:

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
            );

not me pointing out that /* A string! */ comment like it's the main character... because honestly, it is. 👑

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👀 SEE ALSO 👀

• GENLIB_MACRO(3)
• genlib(1)

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and that's the whole page bestie, you ate it, go generate some masks 💅✨

signed, sealed, delivered by ASIM/LIP6 — page date 30 July 2004 🦋🎀💖 periodt.