DIRECTORY
CoreClasses,
Rope,
SC,
SCInstUtil,
SCPrivate,
SCRowUtil,
SCUtil,
RTSets;

SCInstUtilImpl: CEDAR PROGRAM
IMPORTS SC, SCInstUtil, SCRowUtil, SCUtil, Rope, RTSets
EXPORTS SCInstUtil
SHARES SC =

BEGIN
defltLgOrien: PUBLIC SCPrivate.Orientation _ 1;
defltBpOrien: PUBLIC ARRAY SC.Side OF SCPrivate.Orientation _ [3, 1, 4, 2];

InstWidth: PUBLIC PROCEDURE[inst: SCPrivate.Instance] RETURNS[width: SC.Number] = 

BEGIN
orien: SCPrivate.OrientationOrNone _ inst.curOrien;

SELECT orien FROM
0, 1, 3, 5, 6 => width _ inst.object.size.p;
2, 4, 7, 8 => width _ inst.object.size.q;
ENDCASE;
END;

InstHeight: PUBLIC PROCEDURE[inst: SCPrivate.Instance] RETURNS[height: SC.Number] = 

BEGIN
orien: SCPrivate.OrientationOrNone _ inst.curOrien;

SELECT orien FROM
0, 1, 3, 5, 6 => height _ inst.object.size.q;
2, 4, 7, 8 => height _ inst.object.size.p;
ENDCASE;
END;

BpHeight: PUBLIC PROCEDURE[inst: SCPrivate.Instance] RETURNS[height: SC.Number] = {

IF inst.whichClass # io THEN
SC.Error[programmingError, Rope.Cat["Instance: ", inst.name, " should be an IO"]];

SELECT inst.curSide FROM
top, bottom => height _ InstHeight[inst];
left, right => height _ InstWidth[inst];
ENDCASE => SC.Error[programmingError, NIL]};

BpWidth: PUBLIC PROCEDURE[inst: SCPrivate.Instance] RETURNS[width: SC.Number] = {

IF inst.whichClass # io THEN
SC.Error[programmingError, Rope.Cat["Instance: ", inst.name, " should be an IO"]];

SELECT inst.curSide FROM
top, bottom => width _ InstWidth[inst];
left, right => width _ InstHeight[inst];
ENDCASE => SC.Error[programmingError, NIL]};
MinMaxBPOffset: PUBLIC PROCEDURE[handle: SC.Handle, side: SC.Side] RETURNS [minOffset, maxOffset: SC.Number] = {

InstProc: SCRowUtil.EachInstProc = {
minOffset _ MIN[minOffset, instance.offset];
maxOffset _ MAX[maxOffset, instance.offset]};

minOffset _ LAST[INT];
maxOffset _ -minOffset;
[] _ SCRowUtil.EnumerateAllInstsOnSide[handle, side, InstProc]};

BpOffsets: PUBLIC PROCEDURE[handle: SC.Handle, side: SC.Side, pos1, pos2: SCPrivate.ZMaxPosSr] = {

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
bpRow: SCPrivate.BpRow _ layoutData.bpRows[side];
offset: SC.Number;
posA: SCPrivate.ZMaxPosSr _ MIN[pos1, pos2];
posB: SCPrivate.ZMaxPosSr _ MAX[pos1, pos2];
IF posA <= 1 THEN {posA _ 1; offset _ 0}
ELSE
{inst: SCPrivate.Instance _ bpRow.bpsOnSide[posA-1];
offset _ inst.offset + InstWidth[inst] + bpRow.bpSpacing};
IF posB = 0 OR posB > bpRow.nBpsOnSide THEN posB _ bpRow.nBpsOnSide;

FOR posIndex: SCPrivate.ZMaxPosSr IN [posA .. posB] DO 
inst: SCPrivate.Instance _ bpRow.bpsOnSide[posIndex];
width: SC.Number _ BpWidth[inst];
IF side = bottom OR side = right THEN
inst.offset _ offset
ELSE
inst.offset _ offset + width;
offset _ offset + width + bpRow.bpSpacing;
ENDLOOP}; 

BpPos: PUBLIC PROCEDURE[handle: SC.Handle, inst: SCPrivate.Instance] RETURNS[result: SC.Number] = {

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
bpRow: SCPrivate.BpRow _ layoutData.bpRows[inst.curSide];
IF inst.whichClass # io THEN
SC.Error[programmingError, " "];
SELECT inst.curSide FROM
right => result _ bpRow.sideOrg.q + inst.offset;
bottom => result _ bpRow.sideOrg.p + inst.offset;
left => result _ bpRow.sideOrg.q - inst.offset;
top => result _ bpRow.sideOrg.p - inst.offset;
ENDCASE};

PosOf: PUBLIC PROCEDURE[inst: SCPrivate.Instance, pin: SCPrivate.ObjectPin]
RETURNS [pinDes: SCInstUtil.PinDescription] = {

x, y: SC.Number;
SELECT pin.pinPos.side FROM
bottom => {x _ pin.pinPos.location; y _ pin.pinPos.depth};
right => {x _ InstWidth[inst] - pin.pinPos.depth; y _ pin.pinPos.location};
top => {x _ InstWidth[inst] - pin.pinPos.location; y _ InstHeight[inst] - pin.pinPos.depth};
left => {x _ pin.pinPos.depth; y _ InstHeight[inst] - pin.pinPos.location};
ENDCASE; 

SELECT inst.curOrien FROM
0, 1 => {pinDes.xPos _ x; pinDes.yPos _ y};
2 => {pinDes.xPos _ y; pinDes.yPos _ InstWidth[inst] - x};
3 => {pinDes.xPos _ InstWidth[inst] - x; pinDes.yPos _ InstHeight[inst] - y};
4 => {pinDes.xPos _ InstHeight[inst] - y; pinDes.yPos _ x};
5 => {pinDes.xPos _ InstWidth[inst] - x; pinDes.yPos _ y};
6 => {pinDes.xPos _ x; pinDes.yPos _ InstHeight[inst] - y};
7 => {pinDes.xPos _ y; pinDes.yPos _ x};
8 => {pinDes.xPos _ InstHeight[inst] - y; pinDes.yPos _ InstWidth[inst] - x};
ENDCASE;

pinDes.sideOn _ SCUtil.SideTranslate[pin.pinPos.side, inst.curOrien]};

PowerPosOf: PUBLIC PROCEDURE[handle: SC.Handle, row: SCPrivate.ZMaxRowSr, net: SCPrivate.Net, lRSide: SCPrivate.LRSide]
RETURNS [xPos, yPos: SC.Number _ 0, found: BOOLEAN _ FALSE] = {

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
lgRow: SCPrivate.LgRow _ layoutData.lgRows.rows[row];
maxPos: SCPrivate.ZMaxPosSr _ lgRow.nLgsOnRow;
pd: SCInstUtil.PinDescription _ [0, 0, bottom]; 
inst: SCPrivate.Instance;
IF maxPos > 0 THEN {
pin: SCPrivate.ObjectPin;
SELECT lRSide FROM
left => inst _ lgRow.lgsOnRow[1];
right => inst _ lgRow.lgsOnRow[maxPos];
ENDCASE; 
pin _ SCUtil.FindPin[inst.object, net.name];

IF pin # NIL THEN
{pd _ PosOf[inst, pin]; found _ TRUE}
ELSE -- this is a hack until cells have power pins
{IF Rope.Equal[net.name, layoutData.powerBuses[lRSide].name] THEN
{SELECT lRSide FROM
left => {pd.xPos _ 0;
pd.yPos _ InstHeight[inst] - handle.rules.sideRules.trunkWidth/2;
found _ TRUE};
right => {pd.xPos _ InstWidth[inst];
pd.yPos _ handle.rules.sideRules.trunkWidth/2;
found _ TRUE};
ENDCASE}}};
xPos _ lgRow.rowOrg.p + inst.offset + pd.xPos;
yPos _ lgRow.rowOrg.q + pd.yPos};

RotateRect: PUBLIC PROCEDURE[inst: SCPrivate.Instance, defRect: SC.Rect]
RETURNS [newRect: SC.Rect] = {

SELECT inst.curOrien FROM
1 =>
{newRect.x1 _ defRect.x1; newRect.y1 _ defRect.y1;
newRect.x2 _ defRect.x2; newRect.y2 _ defRect.y2};
2 =>
{newRect.x1 _ defRect.y1; newRect.y1 _ InstWidth[inst] - defRect.x1;
newRect.x2 _ defRect.y2; newRect.y2 _ InstWidth[inst] - defRect.x2};
3 =>
{newRect.x1 _ InstWidth[inst] - defRect.x1; newRect.y1 _ InstHeight[inst] - defRect.y1;
newRect.x2 _ InstWidth[inst] - defRect.x2; newRect.y2 _ InstHeight[inst] - defRect.y2};
4 =>
{newRect.x1 _ InstHeight[inst] - defRect.y1; newRect.y1 _ defRect.x1;
newRect.x2 _ InstHeight[inst] - defRect.y2; newRect.y2 _ defRect.x2};
5 =>
{newRect.x1 _ InstWidth[inst] - defRect.x1; newRect.y1 _ defRect.y1;
newRect.x2 _ InstWidth[inst] - defRect.x2; newRect.y2 _ defRect.y2};
6 =>
{newRect.x1 _ defRect.x1; newRect.y1 _ InstHeight[inst] - defRect.y1;
newRect.x2 _ defRect.x2; newRect.y2 _ InstHeight[inst] - defRect.y2};
7 =>
{newRect.x1 _ defRect.y1; newRect.y1 _ defRect.x1;
newRect.x2 _ defRect.y2; newRect.y2 _ defRect.x2};
8 =>
{newRect.x1 _ InstHeight[inst] - defRect.y1; newRect.y1 _ InstWidth[inst] - defRect.x1;
newRect.x2 _ InstHeight[inst] - defRect.y2; newRect.y2 _ InstWidth[inst] - defRect.x2};
ENDCASE};

LgOffsets: PUBLIC PROCEDURE[handle: SC.Handle, row: SCPrivate.ZMaxRowSr, pos1, pos2: SCPrivate.ZMaxPosSr] = {

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
lgRows: SCPrivate.LgRows _ layoutData.lgRows;
lgRow: SCPrivate.LgRow _ lgRows.rows[row];
offset: SC.Number;
posA: SCPrivate.ZMaxPosSr _ MIN[pos1, pos2];
posB: SCPrivate.ZMaxPosSr _ MAX[pos1, pos2];
IF posA <= 1 THEN {posA _ 1; offset _ 0}
ELSE
{inst: SCPrivate.Instance _ lgRow.lgsOnRow[posA-1];
offset _ inst.offset + InstWidth[inst]};
IF posB = 0 OR posB > lgRow.nLgsOnRow THEN posB _ lgRow.nLgsOnRow;

FOR posIndex: SCPrivate.MaxPosSr IN [posA .. posB] DO 
inst: SCPrivate.Instance _ lgRow.lgsOnRow[posIndex];
SELECT inst.whichClass FROM
ft, logic => {inst.offset _ offset; offset _ offset + InstWidth[inst]};
ENDCASE;
ENDLOOP;

IF posB = lgRow.nLgsOnRow THEN
{lgRow.size.p _ offset;
IF lgRow.size.p >= lgRows.maxRowWidth THEN
{lgRows.maxRowWidth _ lgRow.size.p; lgRows.numMaxRows _ 1}
ELSE [lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle]}}; 

AllOffsets: PUBLIC PROCEDURE [handle: SC.Handle] = {

RowRroc: SCRowUtil.EachRowProc = {
LgOffsets[handle, row, 0, 0]};
SideProc: SCRowUtil.EachSideProc = {
BpOffsets[handle, side, 0, 0]};
[] _ SCRowUtil.EnumerateRows[handle, RowRroc];
[] _ SCRowUtil.EnumerateSides[handle, SideProc]};

AsgnChanPos: PUBLIC PROCEDURE[handle: SC.Handle] = 

BEGIN
EachSide: SCRowUtil.EachSideProc = {
sideDim[side] _ bpRows[side].size.p + (bpRows[side].nBpsOnSide -1) * bpRows[side].bpSpacing};

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
lgRows: SCPrivate.LgRows _ layoutData.lgRows;
bpRows: SCPrivate.BpRows _ layoutData.bpRows;
sideChans: SCPrivate.SideChans _ layoutData.sideChans;
rowChans: SCPrivate.RowChans _ layoutData.rowChans;
nRows: SCPrivate.MaxRowSr _ lgRows.count;
nChans: SCPrivate.MaxChanSr _ rowChans.count;
sideDim: ARRAY SC.Side OF SC.Number;
upperActiveLimit, rightActiveLimit, realTotHeight: SC.Number;

[] _ SCRowUtil.EnumerateSides[handle, EachSide];

FOR row: SCPrivate.MaxRowSr IN [1 .. nRows] DO 
IF lgRows.rows[row].dimInvalid THEN SCRowUtil.ComputeRowHeight[handle, row];
ENDLOOP;

IF bpRows[left].dimInvalid THEN SCRowUtil.ComputeSideHeight[handle, left];
IF bpRows[bottom].dimInvalid THEN SCRowUtil.ComputeSideHeight[handle, bottom];
rowChans.chans[1].chanPos _ bpRows[bottom].size.q;
sideChans[left].sideChanPos _ bpRows[left].size.q;

lgRows.horzRowOrg _ bpRows[left].size.q + sideChans[left].sideChanResult;
lgRows.rows[1].rowOrg.p _ lgRows.horzRowOrg + (lgRows.maxRowWidth - lgRows.rows[1].size.p)/2;
lgRows.rows[1].rowOrg.q _ rowChans.chans[1].chanPos + rowChans.chans[1].chanResult;

FOR chan: SCPrivate.MaxChanSr IN [2 .. nChans] DO 
rowChans.chans[chan].chanPos _ lgRows.rows[chan-1].rowOrg.q + lgRows.rows[chan-1].size.q;
IF chan <= nRows THEN {
lgRows.rows[chan].rowOrg.q _ rowChans.chans[chan].chanPos + MAX[rowChans.chans[chan].chanWidth, rowChans.chans[chan].minChanWidth];
lgRows.rows[chan].rowOrg.p _ lgRows.horzRowOrg + (lgRows.maxRowWidth - lgRows.rows[chan].size.p)/2};
ENDLOOP;

sideChans[right].sideChanPos _ lgRows.horzRowOrg + lgRows.maxRowWidth;


upperActiveLimit _ rowChans.chans[nChans].chanPos + MAX[rowChans.chans[nChans].chanWidth, rowChans.chans[nChans].minChanWidth];
layoutData.totHeight _ realTotHeight _ upperActiveLimit + bpRows[top].size.q;

rightActiveLimit _ sideChans[right].sideChanPos +
MAX[sideChans[right].sideChanWidth, sideChans[right].minSideChanWidth];

layoutData.totWidth _ rightActiveLimit + bpRows[right].size.q;

bpRows[bottom].sideOrg.q _ 0;
bpRows[bottom].sideOrg.p _ lgRows.horzRowOrg + (lgRows.maxRowWidth - sideDim[bottom]) / 2;

IF bpRows[top].dimInvalid THEN SCRowUtil.ComputeSideHeight[handle, top];
IF bpRows[right].dimInvalid THEN SCRowUtil.ComputeSideHeight[handle, right];
bpRows[right].sideOrg.p _ rightActiveLimit;
bpRows[right].sideOrg.q _ (realTotHeight - sideDim[right])/ 2;

bpRows[top].sideOrg.p _ lgRows.horzRowOrg + (lgRows.maxRowWidth + sideDim[top])/ 2;
bpRows[top].sideOrg.q _ upperActiveLimit;

bpRows[left].sideOrg.p _ 0;
bpRows[left].sideOrg.q _ (realTotHeight +sideDim[left])/ 2;
END;

ChansForInsts: PUBLIC PROCEDURE[handle: SC.Handle, insts: SCPrivate.InstanceList]
RETURNS [touchesChan: SCPrivate.ChanSet _ RTSets.RTMdSetEmpty] = {

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
FOR instList: SCPrivate.InstanceList _ insts, instList.rest WHILE instList # NIL DO 
inst: SCPrivate.Instance _ instList.first;
SELECT inst.whichClass FROM
ft, logic => {IF inst.curRow > 0 THEN
{touchesChan _ RTSets.RTMdSetUnion[touchesChan, RTSets.RTMdSetGenerateElement[(inst.curRow+1)-1]];
touchesChan _ RTSets.RTMdSetUnion[touchesChan , RTSets.RTMdSetGenerateElement[(inst.curRow)-1]]}};
io => {IF inst.curSide = bottom THEN
touchesChan _ RTSets.RTMdSetUnion[touchesChan, RTSets.RTMdSetGenerateElement[(1)-1]];
IF inst.curSide = top THEN
touchesChan _ RTSets.RTMdSetUnion[touchesChan, RTSets.RTMdSetGenerateElement[(layoutData.rowChans.count)-1]]};
ENDCASE;
ENDLOOP};

CheckInst: PUBLIC PROCEDURE[handle: SC.Handle, inst: SCPrivate.Instance] = {
layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
SELECT inst.whichClass FROM
logic, ft =>
{row: SC.Number _ inst.curRow;
pos: SC.Number _ inst.curPos;
lgRow: SCPrivate.LgRow _ layoutData.lgRows.rows[row];
IF row <= 0 OR row > layoutData.rowChans.count THEN
{IF ~(row = 0 AND pos = 0 AND inst.whichClass = ft) THEN
SC.Error[programmingError, " "]}
ELSE IF pos <= 0 OR pos > lgRow.nLgsOnRow THEN
SC.Error[programmingError, " "]
ELSE
{trialInst: SCPrivate.Instance _ lgRow.lgsOnRow[pos];
IF inst # trialInst THEN
SC.Error[programmingError, " "]}};
io =>
{side: SC.Side _ inst.curSide;
pos: SC.Number _ inst.curPos;
bpRow: SCPrivate.BpRow _ layoutData.bpRows[side];
IF side = none THEN
SC.Error[programmingError, " "]
ELSE IF pos <= 0 OR pos > bpRow.nBpsOnSide THEN
SC.Error[programmingError, " "]
ELSE
{trialInst: SCPrivate.Instance _ bpRow.bpsOnSide[pos];
IF inst # trialInst THEN
SC.Error[programmingError, " "]}};
ENDCASE};

CheckInsts: PUBLIC PROCEDURE[handle: SC.Handle] = {

EachInst: SCInstUtil.EachInstanceProc = {
CheckInst[handle, instance]};
[] _ SCInstUtil.EnumerateInstances[handle, EachInst]};

EnumerateInstances: PUBLIC PROC [handle: SC.Handle, eachInstance: SCInstUtil.EachInstanceProc] RETURNS [quit: BOOL] = {

structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
FOR inst: SCPrivate.MaxInstanceSr IN [1 .. structureData.instances.count] DO
[] _ eachInstance[structureData.instances.inst[inst]];
ENDLOOP};

EnumeratePinsOnInst: PUBLIC PROC [instance: SCPrivate.Instance, eachPin: SCInstUtil.EachPinProc] RETURNS [quit: BOOL _ FALSE] = {

FOR pin: NAT IN [0 .. instance.pinNets.size) WHILE ~quit DO 
quit _ eachPin[instance, pin, instance.pinNets.n[pin]];
ENDLOOP};

DefineInstance: PUBLIC PROCEDURE [handle: SC.Handle, instanceName: Rope.ROPE, object: SCPrivate.Object, coreInstance: CoreClasses.CellInstance, equivName: Rope.ROPE _ NIL]
RETURNS [instance: SCPrivate.Instance _ NIL] = {

structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
instances: SCPrivate.Instances _ structureData.instances;
object.numTimesUsed _ object.numTimesUsed + 1;

SELECT object.typeClass FROM
logic =>
{instance _ NEW[logic SCPrivate.InstanceRec];
instance.whichClass _ logic;
instances.numLogics _ instances.numLogics + 1};
ft =>
{instance _ NEW[ft SCPrivate.InstanceRec];
instance.whichClass _ ft;
instances.numFts _ instances.numFts + 1};
io =>
{instance _ NEW[io SCPrivate.InstanceRec];
instance.equivPortClass _ equivName;
instance.whichClass _ io;
instances.numIOs _ instances.numIOs + 1};
ENDCASE => SC.Error[callingError, Rope.Cat["Feedthrus not allowed in input: ",  instance.name, ", object: ", object.name,  "\n"]];
instance.name _ instanceName;
instance.object _ object;

instance.pinNets _ NEW[SCPrivate.PinNetsRec[object.numPins]];
instances.count _ instances.count + 1;
instance.instanceNum _ instances.count;
instances.inst[instances.count] _ instance};

NumInstsOnList: PUBLIC PROCEDURE [instances: SCPrivate.InstanceList] RETURNS [count: SCPrivate.ZMaxInstanceSr _ 0] = {
FOR instList: SCPrivate.InstanceList _ instances, instList.rest WHILE instList # NIL DO
count _ count + 1;
ENDLOOP};
END.
	Έfile ///StdCell/SCInstUtilImpl.mesa
compoments utility routines
-- InstWidth - find width of component at current orientation
-- InstHeight - find height of component at current orientation
-- BpHeight - find height of bp when considering side it is on
-- BpWidth - find width of bp when considering side it is on
-- MinMaxBPOffset - find min and max offsets of bonding pads on side
-- BpOffsets - find offsets of bonding pads on side
-- BpPos - find position of inst on side
-- PosOf- find the position (side, x, and y) of a component on a pin
-- PowerPosOf- find the position (x, and y) of a power pin
-- RotateRect- Rotate a rectangle of a cell
-- LgOffsets- determine offsets of components in row
-- AllOffsets - determine all component offsets
-- AsgnChanPos - assign current positions to horizontal and vertical channels
-- CheckInsts - check row and position of comps
-- CheckInst - check row and position of a inst
-- EnumeratePinsOnInst - enumerate the net pins on an instance
find width of component at current orientation
find current orientation
now get width based on orientation
find height of component at current orientation
find current orientation
now get height based on orientation 
find height of bp when considering its side
(this is, the dimension perpendicular to side) 
find height of bp when considering side it is on
this is along to side

find offsets of bonding pads on side 
find offsets of bonding pads on side 
find position of inst on side
assumes that channel and bp positions have been assigned.
find the position (side, x, and y) of a component on a pin 

first find the position at normal orientation 
now rotate the pin position to current orien 
find the position (x, and y) of a power pin 
find the position of a rotated rectangle wintin a component
now rotate the pin position to current orien 
determine offsets of components in row 
compute offsets of all comps on row
update max row widths 
determine all component offsets 
assign current positions to horizontal and vertical channels 
compute the minimum channel dimensions
row 1 and channel 1 data
now the interior channels 
now the right side 
get total height and width 
now update the side orgs 
update right side data
update top side data
update left side data
find chans that these comps touch 
check row and position of a inst 
check row and position of a inst 

define a component (an instance of object)
construct he instance record
initialize the nets connected to these pins
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