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#!/usr/bin/env splrun
//
// Test procedure for matching Gates with shorted inputs, as suggested in
// "SubCircuit Extraction with SubGraph Isomorphism. Zong Ling, Ph. D. IBM
// Almaden Research Center -- EDA Shape Processing zling@us.ibm.com.":
//
// Four NAND gates and a NOR gate. One NAND gate (G1) has no shorted inputs,
// one (G2) has an input shorted to VSS, one (G3) has an input shorted to VDD,
// and one (G4) has both inputs shorted together. Th last gate (G5) is a NOR
// gate.
var net;
function makeNAND(id)
{
net["${id}_VDD"] = "${id}_pa S";
net["${id}_VSS"] = "${id}_nb S";
net["${id}_A"] = "${id}_pa G";
net["${id}_B"] = "${id}_pb G";
net["${id}_Y"] = "${id}_pb D";
return <:>
: node ${id}_pa pmos S 1 D 1 G 1
: node ${id}_pb pmos S 1 D 1 G 1
: node ${id}_na nmos S 1 D 1 G 1
: node ${id}_nb nmos S 1 D 1 G 1
: connect ${id}_pa S ${id}_pb S
: connect ${id}_pa D ${id}_pb D
: connect ${id}_pa D ${id}_na D
: connect ${id}_na S ${id}_nb D
: connect ${id}_pa G ${id}_na G
: connect ${id}_pb G ${id}_nb G
</>;
}
function makeNOR(id)
{
net["${id}_VDD"] = "${id}_pa S";
net["${id}_VSS"] = "${id}_nb S";
net["${id}_A"] = "${id}_pa G";
net["${id}_B"] = "${id}_pb G";
net["${id}_Y"] = "${id}_pb D";
return <:>
: node ${id}_pa pmos S 1 D 1 G 1
: node ${id}_pb pmos S 1 D 1 G 1
: node ${id}_na nmos S 1 D 1 G 1
: node ${id}_nb nmos S 1 D 1 G 1
: connect ${id}_pa D ${id}_pb S
: connect ${id}_pb D ${id}_na D
: connect ${id}_pb D ${id}_nb D
: connect ${id}_na S ${id}_nb S
: connect ${id}_pa G ${id}_na G
: connect ${id}_pb G ${id}_nb G
</>;
}
write(<:>
: graph nand
: ${ makeNAND("G0") }
: extern ${net["G0_VDD"]}
: extern ${net["G0_VSS"]}
: extern ${net["G0_A"]}
: extern ${net["G0_B"]}
: extern ${net["G0_Y"]}
: endgraph
:
: graph nor
: ${ makeNOR("G0") }
: extern ${net["G0_VDD"]}
: extern ${net["G0_VSS"]}
: extern ${net["G0_A"]}
: extern ${net["G0_B"]}
: extern ${net["G0_Y"]}
: endgraph
:
: graph haystack
: ${ makeNAND("G1") }
: ${ makeNAND("G2") }
: ${ makeNAND("G3") }
: ${ makeNAND("G4") }
${ makeNOR("G5") }
:
: node vdd vsupply V 1
: connect vdd V ${net["G1_VDD"]}
: connect vdd V ${net["G2_VDD"]}
: connect vdd V ${net["G3_VDD"]}
: connect vdd V ${net["G4_VDD"]}
: connect vdd V ${net["G5_VDD"]}
:
: node vss vsupply V 1
: connect vss V ${net["G1_VSS"]}
: connect vss V ${net["G2_VSS"]}
: connect vss V ${net["G3_VSS"]}
: connect vss V ${net["G4_VSS"]}
: connect vss V ${net["G5_VSS"]}
:
: connect ${net["G2_A"]} ${net["G1_A"]}
: connect ${net["G2_B"]} ${net["G2_VSS"]}
:
: connect ${net["G3_A"]} ${net["G1_VDD"]}
: connect ${net["G3_B"]} ${net["G2_Y"]}
:
: connect ${net["G4_A"]} ${net["G1_Y"]}
: connect ${net["G4_B"]} ${net["G1_Y"]}
:
: connect ${net["G5_A"]} ${net["G3_Y"]}
: connect ${net["G5_B"]} ${net["G4_Y"]}
: endgraph
:
: solve nand haystack false
: clearoverlap
: expect 4
:
: solve nor haystack false
: clearoverlap
: expect 1
</>);
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