DIRECTORY LichenCollections, LichenDataOps, LichenDataStructure, LichenIntFunctions, LichenNavigation, LichenPairCollections, LichenTransforms, LichenTransformsPrivate, RefTab;

LichenChildishTransforms: CEDAR PROGRAM
IMPORTS LichenCollections, LichenDataOps, LichenDataStructure, LichenIntFunctions, LichenNavigation, LichenPairCollections, RefTab
EXPORTS LichenTransforms, LichenTransformsPrivate
=

BEGIN OPEN LichenDataStructure, LichenNavigation, LichenTransforms, LichenDataOps, LichenTransformsPrivate, Colls:LichenCollections, PairColls:LichenPairCollections, IntFns:LichenIntFunctions;

LowerChildren: PUBLIC PROC [design: Design, childType: CellType, sibber: ConstFunction--child _ Seq (role f sibling: Vertex)--] RETURNS [gcs: Seq--role f grandchild--] =
BEGIN
analysis: Analysis = NEW [AnalysisPrivate _ [
roles: LAST[NATURAL],
wag: NEW [WireAnsweringPrivate _ [
anses: PairColls.CreateHashFn[]
]],
doomedPorts: Colls.CreateHashSet[]
]];
{OPEN analysis;
oldPort: Port ~ childType.port;
newPort: Port ~ oldPort;
first: BOOL _ TRUE;
dif: BOOL _ FALSE;
parentTypes: VarSet ~ Colls.CreateHashSet[];
childrenV: VarSet ~ Colls.CreateHashSet[];
{SeeInstance: PROC [child: CellInstance] = {
sibs: Seq--role f sibling-- = IntFns.DeRef[sibber.Apply[child].val];
IF IsMirror[child] THEN ERROR;	--AM2
IF first THEN {
roles _ sibs.Size;
wag.oldSubjConnectionss _ CreateRefSeq[sibs.Size];
subjTypes _ sibs.Compose[right: instanceType, rightRestricts: FALSE].CreateSimpleCopy[domainFixed: TRUE];
};
IF Survey[child.containingCT, child, sibs, analysis, first] THEN dif _ TRUE;
first _ FALSE;
};
EnumerateInstances[childType, SeeInstance, FALSE];
};
IF first OR dif THEN RETURN [IntFns.nilIntFn];
NoteChange[childType];
gcs _ CreateSeq[oneToOne: TRUE];
FOR role: NATURAL IN [0 .. roles) DO
gcs.Append[Instantiate[
type: NARROW[subjTypes.Apply[role].val],
containingCT: childType]];
ENDLOOP;
{MaybeDeleteOldChildPort: PROC [cPort: Port, w: Vertex, e: Edge] = {
wire: Wire = NARROW[w];
IF doomedPorts.HasMember[cPort] THEN RemoveEdges[e];
};
EnumerateTopEdges[childType.asUnorganized.mirror, MaybeDeleteOldChildPort]};
<<{PerTopWire: PROC [pair: PairColls.Pair] = {
outerWire: Wire = NARROW[pair[left]];
wa: WireAns = NARROW[pair[right]];
NewPort: PROC RETURNS [insideNet: Wire] = {
SELECT wa.doFrom FROM
addPort => {
wa.counterpart _ insideNet _ CreateWire[containingCT: childType, copy: outerWire];
wa.fromPort _ AddPort[[parent: newPort, wire: insideNet]];
AddEdge[[childType.asUnorganized.mirror, insideNet], wa.fromPort];
};
dePort => ERROR;
leave, dontAdd => IF (insideNet _ wa.counterpart) = NIL THEN ERROR;
ENDCASE => ERROR;
RETURN};
MakeDummy: PROC RETURNS [insideNet: Wire] = {
IF wa.counterpart # NIL THEN RETURN [wa.counterpart];
wa.counterpart _ insideNet _ CreateWire[containingCT: childType, copy: outerWire];
RETURN};
innerWire: Wire = IF wa.sawBord THEN wa.fromPort.wire ELSE IF wa.sawElse THEN NewPort[] ELSE MakeDummy[];
FOR subjPorts: RoledPortList _ wa.subjPorts, subjPorts.rest WHILE subjPorts # NIL DO
gc: CellInstance ~ NARROW[gcs.Apply[subjPorts.first.role].val];
AddEdges[[gc, innerWire], subjPorts.first.port];
design _ design;
ENDLOOP;
RETURN};
wag.anses.Enumerate[PerTopWire];
design _ design};>>
FOR role: NATURAL IN [0 .. roles) DO
rt: RefTable--subj port _ wire connected to that port of that subject at first site-- ~ NARROW[wag.oldSubjConnectionss[role]];
gc: CellInstance ~ NARROW[gcs.Apply[role].val];
PerPort: PROC [gcPort: Port] RETURNS [subs, sibs: BOOL _ TRUE] ~ {
urWire: Wire ~ NARROW[rt.Fetch[gcPort].val];
subs _ urWire=NIL;
IF urWire#NIL THEN {
wa: WireAns = GetRPAns[wag, role, gcPort, urWire, FALSE];
NewPort: PROC RETURNS [insideNet: Wire] = {
SELECT wa.doFrom FROM
addPort => {
insideNet _ CreateWire[containingCT: childType, copy: urWire];
wa.fromPort _ AddPort[[parent: newPort, wire: insideNet]];
AddEdge[[childType.asUnorganized.mirror, insideNet], wa.fromPort];
};
dePort => ERROR;
leave, dontAdd => ERROR;
ENDCASE => ERROR;
RETURN};
MakeDummy: PROC RETURNS [insideNet: Wire] = {
insideNet _ CreateWire[containingCT: childType, copy: urWire];
RETURN};
IF wa.counterpart=NIL THEN wa.counterpart _ IF wa.sawBord THEN wa.fromPort.wire ELSE IF wa.sawElse THEN NewPort[] ELSE MakeDummy[];
{innerWire: Wire ~ wa.counterpart;
AddEdges[[gc, innerWire], gcPort];
design _ design;
}};
RETURN};
ScanPorts[gc.type, PerPort];
design _ design;
ENDLOOP;
CheckCellType[ct: childType, rep: ignore, norm: check, comparable: ignore, instances: FALSE];
{TweakInstance: PROC [child: CellInstance] = {
sibs: Seq--role f sibling--;
IF IsMirror[child] THEN ERROR;	--AM2
[] _ childrenV.AddElt[child];
sibs _ IntFns.DeRef[sibber.Apply[child].val];
IF sibs.Size # roles THEN ERROR --caller blew it--;
FOR role: NATURAL IN [0 .. roles) DO
sib: CellInstance = NARROW[sibs.Apply[role].val];
PerEdge: PROC [gcPort: Port, net: Vertex, e: Edge] = {
wa: WireAns = GetRPAns[wag, role, gcPort];
IF wa.sawElse AND NOT wa.sawBord THEN {
IF wa.child # child THEN {
AddEdges[[child, NARROW[net]], wa.fromPort];
wa.child _ child};
};
IF NOT (wa.sawElse OR wa.sawBords) THEN DeleteVertex[net] ELSE RemoveEdges[e];
};
IF sib.containingCT # child.containingCT THEN ERROR --caller blew it--;
EnumerateTopEdges[sib, PerEdge];
DeleteVertex[sib];
ENDLOOP;
NoteChange[child.containingCT];
[] _ parentTypes.AddElt[child.containingCT];
};
EnumerateInstances[childType, TweakInstance, FALSE]};
CheckCellTypes[parentTypes.Freeze, ignore, check, ignore];
}END;

RaiseGrandchildren: PUBLIC PROC [design: Design, gcs: Seq--role f instance in childType--] RETURNS [childType: CellType, sibber: ConstFunction--child _ Seq (role f sibling: Vertex)--, typer: ConstFunction--array*n of childType _ Seq (role f array*n of type of gcs[role])--] =
BEGIN
analysis: Analysis = NEW [AnalysisPrivate _ [
roles: gcs.Size,
subjTypes: gcs.Compose[instanceType].CreateSimpleCopy[oneToOne: TRUE].Freeze,
wag: NEW [WireAnsweringPrivate _ [
oldSubjConnectionss: CreateRefSeq[gcs.Size],
anses: PairColls.CreateHashFn[]
]],
doomedPorts: Colls.CreateHashSet[]
]];
{OPEN analysis;
addedPorts: VarSet = Colls.CreateHashSet[];
parentTypes: VarSet = Colls.CreateHashSet[];
sibberV: VarFunction ~ PairColls.CreateHashFn[];
childType _ NARROW[gcs.First.pair.right, CellInstance].containingCT;
typer _ PairColls.CreateSingleton[[childType, subjTypes.Refify], [Colls.refs, Colls.refs]];
FOR role: NAT IN [0 .. roles) DO
gc: CellInstance ~ NARROW[gcs.Apply[role].val];
IF gc.containingCT # childType THEN ERROR;
ENDLOOP;
{oldPort: Port ~ childType.port;
newPort: Port ~ oldPort;
IF Survey[childType, NIL, gcs, analysis, TRUE] THEN ERROR;
{DeleteDoomed: PROC [elt: REF ANY] = {
RemovePort[NARROW[elt]];
};
doomedPorts.Enumerate[DeleteDoomed];
};
{MaybeAddPort: PROC [pair: PairColls.Pair] ~ {
wire: Wire ~ NARROW[pair[left]];
wa: WireAns ~ NARROW[pair[right]];
IF NOT wa.analyzed THEN ERROR;
IF wa.sawElse AND NOT wa.sawBord THEN {
SELECT wa.doFrom FROM
addPort => {
wa.fromPort _ AddPort[[parent: newPort, wire: wire]];
[] _ addedPorts.AddElt[wa.fromPort];
AddEdge[[childType.asUnorganized.mirror, wire], wa.fromPort]};
leave, dontAdd, dePort => NULL;
ENDCASE => ERROR;
};
};
wag.anses.Enumerate[MaybeAddPort];
};
<<FOR role: NATURAL IN [0 .. roles) DO
gc: CellInstance = NARROW[gcs[role]];
PerEdge: PROC [gcPort: Port, wire: Wire] = {
wa: WireAns = GetRPAns[wag, role, gcPort, wire, FALSE];
IF NOT wa.analyzed THEN ERROR;
IF wa.sawElse AND NOT wa.sawBord THEN {
SELECT wa.doFrom FROM
addPort => {
wa.doFrom _ addedPort;
wa.fromPort _ AddPort[[parent: newPort, wire: wire]];
[] _ addedPorts.AddElt[wa.fromPort];
AddEdge[[childType.asUnorganized.mirror, wire], wa.fromPort]};
addedPort => NULL;
leave, dontAdd, dePort => NULL;
ENDCASE => ERROR;
};
};
EnumerateTopConnections[gc, PerEdge];
ENDLOOP;>>
NoteChange[childType];
FOR role: NATURAL IN [0 .. roles) DO
gc: CellInstance ~ NARROW[gcs.Apply[role].val];
PerEdge: PROC [gcPort: Port, wire: Wire, e: Edge] = {
wa: WireAns = GetRPAns[wag, role, gcPort, wire, FALSE];
IF NOT (wa.sawElse OR wa.sawBords) THEN DeleteVertex[wire] ELSE RemoveEdge[e];
};
EnumerateTopEdges[gc, PerEdge];
DeleteVertex[gc];
ENDLOOP;
CheckCellType[ct: childType, rep: ignore, norm: check, comparable: ignore, instances: FALSE];
{FixInstance: PROC [child: CellInstance] = {
sibs: Seq ~ CreateSeq[oneToOne: TRUE, dense: TRUE];
cons: RefTable--child port _ wire-- = CreateRefTable[];
IF IsMirror[child] THEN ERROR;	--AM2
[] _ sibberV.Store[[child, sibs.Refify]];
FOR role: NATURAL IN [0 .. roles) DO
gc: CellInstance = NARROW[gcs.Apply[role].val];
sibs.Append[Instantiate[gc.type, child.containingCT]];
ENDLOOP;
{PerConnection: PROC [cPort: Port, net: Vertex, ce: Edge] = {
[] _ cons.Store[cPort, net];
IF doomedPorts.HasMember[cPort] THEN RemoveEdges[ce];
};
EnumerateTopEdges[child, PerConnection]};
{LinkToNewPort: PROC [elt: REF ANY] = {
cPort: Port = NARROW[elt];
outerNet: Wire = CreateWire[containingCT: child.containingCT, copy: cPort.wire];
IF cPort.wire=NIL THEN ERROR;
AddEdges[[child, outerNet], cPort];
[] _ cons.Store[cPort, outerNet];
};
addedPorts.Enumerate[LinkToNewPort]};
FOR role: NATURAL IN [0 .. roles) DO
sib: CellInstance = NARROW[sibs.Apply[role].val];
PerPort: PROC [gcPort: Port] = {
wa: WireAns = GetRPAns[wag, role, gcPort];
MakeDummyNet: PROC [iNet: Wire] RETURNS [oNet: Wire] = {
oNet _ wa.counterpart;
IF oNet = NIL OR wa.child # child THEN {
oNet _ CreateWire[containingCT: child.containingCT, copy: iNet];
wa.counterpart _ oNet;
wa.child _ child;
};
};
AddEdge[
[sib,
IF wa.sawBord OR wa.sawElse
THEN NARROW[cons.Fetch[wa.fromPort].val]
ELSE MakeDummyNet[wa.proto]],
gcPort];
};
EnumeratePorts[sib.type, PerPort];
ENDLOOP;
NoteChange[child.containingCT];
[] _ parentTypes.AddElt[child.containingCT];
};
EnumerateInstances[childType, FixInstance, FALSE]};
CheckCellTypes[parentTypes.Freeze, ignore, check, ignore];
sibber _ sibberV.Freeze[];
}}END;

Survey: PUBLIC PROC [parent: CellType, child: Vertex, sibs: Seq--role f grandchild--, analysis: Analysis, first: BOOL] RETURNS [dif: BOOL _ FALSE] = {
OPEN analysis;
lwag: WireAnswering = NEW [WireAnsweringPrivate _ [CreateRefSeq[roles], PairColls.CreateHashFn[]]];
IF sibs.Size # subjTypes.Size THEN {
Warning["Different number of siblings (%g, rather than %g) at %g", Int[sibs.Size], Int[subjTypes.Size], child];
dif _ TRUE}
ELSE FOR role: NATURAL IN [0 .. roles) DO
sib: CellInstance = NARROW[sibs.Apply[role].val];
SeeConnection: PROC [gcPort: Port, wire: Wire] = {
lwa: WireAns = GetRPAns[lwag, role, gcPort, wire, TRUE];
wa: WireAns = GetRPAns[wag, role, gcPort, wire, first];
SeeBackConnection: PROC [cPort: Port, v: Vertex] = {
ci: CellInstance = NARROW[v];
bord: BOOL = IF child # NIL THEN ci=child ELSE IsMirror[ci];
IF bord THEN {
lwa.sawBords _ lwa.sawBord;
lwa.sawBord _ TRUE;
lwa.fromPort _ cPort;
}
ELSE {sawSomeSelf: BOOL _ FALSE;
FOR j: NATURAL IN [0 .. roles) DO
IF ci = sibs.Apply[j].Val THEN sawSomeSelf _ lwa.sawSelves[j] _ TRUE;
ENDLOOP;
IF NOT sawSomeSelf THEN lwa.sawElse _ TRUE;
};
RETURN};
IF NOT lwa.analyzed THEN {
lwa.analyzed _ TRUE;
lwa.sawSelves _ CreateBoolSeq[roles, FALSE];
EnumerateTransitiveConnections[wire, SeeBackConnection];
IF NOT lwa.sawSelves[role] THEN ERROR;
IF first THEN {
wa^ _ lwa^;
IF wa.sawBord AND NOT (wa.sawElse OR wa.sawBords) THEN {
losses _ NoteLoss[wa, losses];
IF NOT doomedPorts.AddElt[wa.fromPort] THEN ERROR;
};
IF wa.sawElse AND NOT wa.sawBord THEN fromGains _ NoteFromGain[wa, fromGains];
IF NOT (wa.sawElse OR wa.sawBord) THEN wa.doFrom _ dontAdd;
IF wa.sawElse OR wa.sawBord THEN toGains _ NoteToGain[wa, toGains];
}
ELSE {
IF wa.sawBord # lwa.sawBord THEN GOTO Dif;
IF wa.sawBords # lwa.sawBords THEN GOTO Dif;
IF wa.sawElse # lwa.sawElse THEN GOTO Dif;
FOR j: NATURAL IN [0 .. roles) DO
IF wa.sawSelves[j] # lwa.sawSelves[j] THEN GOTO Dif;
ENDLOOP;
EXITS
Dif => {Warning["%g is connected differently than at first site", wire]; dif _ TRUE};
};
};
IF first THEN {
wa.subjPorts _ CONS[[role, gcPort], wa.subjPorts];
};
RETURN};
IF subjTypes.Apply[role].val # sib.type THEN {
Warning["%g is a %g, not a %g", sib, sib.type, subjTypes.Apply[role].val];
dif _ TRUE}
ELSE IF sib = child THEN {
Warning["Child %g sibbed to itself", child];
dif _ TRUE}
ELSE IF sib.containingCT # parent THEN ERROR
ELSE {
EnumerateTopConnections[sib, SeeConnection];
parent _ parent};
ENDLOOP;
RETURN};

GetRPAns: PUBLIC PROC [wag: WireAnswering, role: NATURAL, subjPort: Port, wire: Wire _ NIL, mayChange: BOOL _ FALSE] RETURNS [wa: WireAns] = {
kw: Wire;
rt: RefTable _ NARROW[wag.oldSubjConnectionss[role]];
IF rt = NIL THEN {
IF NOT mayChange THEN ERROR;
wag.oldSubjConnectionss[role] _ rt _ CreateRefTable[];
};
IF wire = NIL THEN {
wire _ NARROW[rt.Fetch[subjPort].val];
IF wire = NIL THEN ERROR;
};
kw _ NARROW[rt.Fetch[subjPort].val];
IF kw = NIL THEN {
IF NOT mayChange THEN ERROR;
IF NOT rt.Insert[subjPort, kw _ wire] THEN ERROR};
IF wire # kw THEN ERROR;
wa _ NARROW[wag.anses.Apply[wire].DVal];
IF wa = NIL THEN {
IF NOT mayChange THEN ERROR;
wa _ NEW [WireAnsPrivate _ [proto: wire]];
IF NOT wag.anses.Store[[wire, wa]].new THEN ERROR;
};
};

NoteLoss: PROC [wa: WireAns, oldLosses: CARDINAL] RETURNS [newLosses: CARDINAL] = {
newLosses _ oldLosses;
SELECT wa.doFrom FROM
leave => {newLosses _ newLosses + 1; wa.doFrom _ dePort};
dePort => NULL;
addPort, dontAdd => ERROR;
ENDCASE => ERROR;
};

NoteFromGain: PROC [wa: WireAns, oldGains: CARDINAL] RETURNS [newGains: CARDINAL] = {
newGains _ oldGains;
SELECT wa.doFrom FROM
leave => {newGains _ newGains + 1; wa.doFrom _ addPort};
addPort => NULL;
dePort, dontAdd => ERROR;
ENDCASE => ERROR;
};

NoteToGain: PROC [wa: WireAns, oldGains: CARDINAL] RETURNS [newGains: CARDINAL] = {
newGains _ oldGains;
SELECT wa.doTo FROM
dontAdd => {newGains _ newGains + 1; wa.doTo _ addPort};
addPort => NULL;
ENDCASE => ERROR;
};

Int: PROC [i: INT] RETURNS [ra: REF ANY] = {ra _ NEW [INT _ i]};

END.
fLichenChildishTransforms.Mesa
Last tweaked by Mike Spreitzer on August 28, 1987 11:17:12 am PDT
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