DIRECTORY
Convert, Core, FS, IO, Random, Real, RealFns, Rope, RTCoreUtil, SC, SCChanUtil, SCInstUtil, SCNetUtil, SCPrivate, SCPlaceUtil, SCRowUtil, SCUtil, RTBasic, TerminalIO;

SCSAPlaceImpl: CEDAR PROGRAM

IMPORTS Convert, FS, IO, Random, Real, RealFns, Rope, RTCoreUtil, SC, SCChanUtil, SCInstUtil, SCNetUtil, SCPlaceUtil, SCRowUtil, SCUtil, TerminalIO
EXPORTS SCPrivate
SHARES SC = { 

debug: BOOLEAN _ FALSE;
verbose: BOOLEAN _ TRUE;

InstCounts: TYPE = REF InstCountsRec;
InstCountsRec: TYPE = ARRAY SCPrivate.MaxInstanceSr OF INT _ ALL[0];

ExchDescription: TYPE = REF ExchDescriptionRec;
ExchDescriptionRec: TYPE = RECORD [
inst1, inst2: SCPrivate.Instance _ NIL,
doSides: BOOLEAN _ FALSE];
MoveDescription: TYPE = REF MoveDescriptionRec;
MoveDescriptionRec: TYPE = RECORD [
inst: SCPrivate.Instance _ NIL,
row, previousRow: SCPrivate.ZMaxRowSr _ 0,
pos, previousPos: SCPrivate.ZMaxPosSr _ 0,
side, previousSide: SC.SideOrNone _ none,
doSides: BOOLEAN _ FALSE];

tableSize: INT = 3500;
ZTabSize: TYPE = INT[0 .. tableSize];
TabSize: TYPE = INT[1 .. tableSize];
ScoreHandle: TYPE = REF ScoreHandleRec;
RealArray: TYPE = REF RealArrayRec;
RealArrayRec: TYPE = ARRAY TabSize OF REAL;
ScoreHandleRec: TYPE = RECORD [
maxSize, size, index, numActiveEntries: ZTabSize _ 0,
mean, variance: REAL _ 0.0,
withInCount, tolerance, withInCountLimit, toleranceLimit: INT _ 0,
entry, sum, sumSq: RealArray _ NIL];

InitScoreHandle: PROCEDURE [sh: ScoreHandle, size, limit: INT] = {
sh.index _ sh.size _ MIN[size, sh.maxSize];
sh.numActiveEntries _ 0;
sh.withInCount _ sh.tolerance _ 0;
sh.withInCountLimit _ Real.Fix[0.38*limit];
sh.toleranceLimit _ Real.Fix[0.62*limit];
FOR index: TabSize IN TabSize DO 
sh.entry[index] _ 0;
sh.sum[index] _ 0;
sh.sumSq[index] _ 0;
ENDLOOP};

IncScoreHandle: PROCEDURE [score: REAL, sh: ScoreHandle] = {
meanSq, exSq: REAL;
oldIndex: TabSize _ sh.index;
sh.index _ IF sh.index < sh.size THEN sh.index + 1 ELSE 1;
sh.numActiveEntries _ IF sh.numActiveEntries < sh.size THEN sh.numActiveEntries + 1 ELSE sh.size;
sh.sum[sh.index] _ sh.sum[oldIndex] - sh.entry[sh.index] + score;
sh.sumSq[sh.index] _ sh.sumSq[oldIndex] - sh.entry[sh.index]*sh.entry[sh.index] + score*score;
sh.entry[sh.index] _ score;
sh.mean _ sh.sum[sh.index]/sh.numActiveEntries;
meanSq _ sh.mean*sh.mean;
exSq _ sh.sumSq[sh.index]/sh.numActiveEntries;
sh.variance _ MAX[0.0, exSq - meanSq]};

Frozen: PROCEDURE [maxScore, minScore, maxChange: REAL] RETURNS [BOOLEAN] = INLINE {
RETURN[RealFns.AlmostZero[(maxScore - minScore) - maxChange, -15]]};

Equilibrium: PROCEDURE [score: REAL, sh: ScoreHandle] RETURNS [equilibrium: BOOLEAN _ FALSE] = {
delta: INT;
IncScoreHandle[score, sh];
delta _ Real.Fix[RealFns.SqRt[sh.variance]]/2;
IF sh.mean - delta <= score AND score <= sh.mean + delta THEN sh.withInCount _ sh.withInCount + 1
ELSE sh.tolerance _ sh.tolerance + 1;
IF sh.withInCount >= sh.withInCountLimit OR sh.numActiveEntries >= sh.size THEN equilibrium _ TRUE
ELSE IF sh.tolerance >= sh.toleranceLimit THEN {sh.withInCount _ sh.tolerance _ 0}};

Select2: PROCEDURE [handle: SC.Handle, selectStream: Random.RandomStream, exch: ExchDescription] = {
exch.doSides _ FALSE;
exch.inst1 _ GetInstance[handle, selectStream];
SELECT exch.inst1.whichClass FROM
io => { --got an IO, get another IO
exch.inst2 _ GetIo[handle, exch.inst1, selectStream];
IF exch.inst2 = NIL THEN RETURN};
logic => { --got a logic, get another logic
exch.inst2 _ GetLogic[handle, exch.inst1, selectStream];
IF exch.inst2 = NIL THEN RETURN};
ENDCASE =>  SC.Error[programmingError, "Invalid instance index."]};

Select1: PROCEDURE [handle: SC.Handle, selectStream: Random.RandomStream, move: MoveDescription] = {
move.inst _ GetInstance[handle, selectStream];
move.previousPos _ move.inst.curPos; move.doSides _ FALSE;
SELECT move.inst.whichClass FROM
io => { --got an IO, get another IO
inst2: SCPrivate.Instance _ GetIo[handle, move.inst, selectStream];
IF inst2 = NIL THEN RETURN;
move.side _ inst2.curSide; move.pos _ inst2.curPos;
move.previousSide _ move.inst.curSide;
move.previousRow _ move.row _ 0};
logic => { --got a logic, get another logic
inst2: SCPrivate.Instance _ GetLogic[handle, move.inst, selectStream];
IF inst2 = NIL THEN RETURN;
move.row _ inst2.curRow; move.pos _ inst2.curPos;
move.previousRow _ move.inst.curRow;
move.previousSide _ move.side _ none};
ENDCASE =>  SC.Error[programmingError, "Invalid instance index."]};

Exchange: PROCEDURE [handle: SC.Handle, exch: ExchDescription, rowWidthLimit: SC.Number] RETURNS [didIt: BOOLEAN _ TRUE] = {
layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
inst1: SCPrivate.Instance _ exch.inst1;
inst2: SCPrivate.Instance _ exch.inst2;
oldRowWidth: SC.Number _ layoutData.lgRows.maxRowWidth;
IF inst1 = NIL OR inst2 = NIL THEN RETURN[FALSE];
SELECT inst1.whichClass FROM
logic => {
row1: SCPrivate.LgRow _ layoutData.lgRows.rows[inst1.curRow];
row2: SCPrivate.LgRow _ layoutData.lgRows.rows[inst2.curRow];
lengthRow1: SC.Number _ row1.size.p - SCInstUtil.InstWidth[inst1] + SCInstUtil.InstWidth[inst2];
lengthRow2: SC.Number _ row2.size.p - SCInstUtil.InstWidth[inst2] + SCInstUtil.InstWidth[inst1];
doAdjust: BOOLEAN _ lengthRow1 # row1.size.p OR lengthRow2 # row2.size.p;
IF lengthRow1 > rowWidthLimit OR lengthRow2 > rowWidthLimit THEN RETURN [FALSE];
IF row1.fnlLgFxd OR row2.fnlLgFxd THEN RETURN [FALSE];
IF inst1.fnlRow # 0 AND inst2.curRow # inst1.fnlRow THEN RETURN [FALSE];
IF inst2.fnlRow # 0 AND inst1.curRow # inst2.fnlRow THEN RETURN [FALSE];
SCPlaceUtil.ExchInsts[handle, inst1, inst2];
IF doAdjust THEN SCInstUtil.AsgnChanPos[handle]};
io => {
side1: SCPrivate.BpRow _ layoutData.bpRows[inst1.curSide];
side2: SCPrivate.BpRow _ layoutData.bpRows[inst2.curSide];
IF side1.fnlBpFxd OR side2.fnlBpFxd  THEN RETURN [FALSE];
IF inst1.fnlSide # none AND inst2.curSide # inst1.fnlSide THEN RETURN [FALSE];
IF inst2.fnlSide # none AND inst1.curSide # inst2.fnlSide THEN RETURN [FALSE];
SCPlaceUtil.ExchInsts[handle, inst1, inst2];
IF side1 # side2 THEN SCInstUtil.AsgnChanPos[handle]};
ENDCASE;

exch.doSides _ layoutData.lgRows.maxRowWidth # oldRowWidth};

Restore: PROC [handle: SC.Handle, move, shell: MoveDescription] RETURNS [didIt: BOOLEAN] ~ {
shell.inst _ move.inst;  shell.row _ move.previousRow; shell.pos _ move.previousPos; shell.side _ move.previousSide; shell.doSides _ move.doSides;
didIt _ Move[handle, shell, LAST[INT]]};

Move: PROCEDURE [handle: SC.Handle, move: MoveDescription, rowWidthLimit: SC.Number] RETURNS [didIt: BOOLEAN _ TRUE] = {
layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
oldRowWidth: SC.Number _ layoutData.lgRows.maxRowWidth;
IF move.inst = NIL THEN RETURN[FALSE];
SELECT move.inst.whichClass FROM
logic => {
row1: SCPrivate.LgRow _ layoutData.lgRows.rows[move.inst.curRow];
row2: SCPrivate.LgRow _ layoutData.lgRows.rows[move.row];
IF row1 # row2 THEN {
lengthRow1: SC.Number _ row1.size.p - SCInstUtil.InstWidth[move.inst];
lengthRow2: SC.Number _ row2.size.p + SCInstUtil.InstWidth[move.inst];
IF lengthRow1 > rowWidthLimit OR lengthRow2 > rowWidthLimit THEN RETURN [FALSE];
IF row1.nLgsOnRow = 1 THEN RETURN [FALSE];
IF row2.nLgsOnRow + 1 > SCPrivate.maxPos THEN RETURN [FALSE]};
IF row1.fnlLgFxd OR row2.fnlLgFxd THEN RETURN [FALSE];
IF move.inst.fnlRow # 0 AND move.row # move.inst.fnlRow THEN RETURN [FALSE];
SCPlaceUtil.RemvLgComp[handle, move.inst, TRUE];
SCPlaceUtil.PutLgPos[handle, move.inst, move.row, move.pos, move.inst.curOrien, TRUE];  -- off by 1 if moved to same row
IF row1 # row2 THEN SCInstUtil.AsgnChanPos[handle]};
io => {
side1: SCPrivate.BpRow _ layoutData.bpRows[move.inst.curSide];
side2: SCPrivate.BpRow _ layoutData.bpRows[move.side];
IF side1.fnlBpFxd OR side2.fnlBpFxd THEN RETURN [FALSE];
IF move.inst.fnlSide # none AND move.side # move.inst.fnlSide THEN RETURN [FALSE];
IF side1 # side2 AND side2.nBpsOnSide + 1 > side2.maxBpsOnSide THEN RETURN [FALSE];
SCPlaceUtil.RemvBpComp[handle, move.inst, TRUE];
SCPlaceUtil.PutBpPos[handle, move.inst, move.side, move.pos, SCInstUtil.defltBpOrien[move.side]];  -- off by 1 if moded to same side
IF side1 # side2 THEN SCInstUtil.AsgnChanPos[handle]};
ENDCASE;
move.doSides _ layoutData.lgRows.maxRowWidth # oldRowWidth};

GetInstance: PROCEDURE [handle: SC.Handle, selectStream: Random.RandomStream] RETURNS [SCPrivate.Instance]= {
structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
numInstances: SCPrivate.ZMaxInstanceSr _ structureData.instances.numLogics + structureData.instances.numIOs;
index: SCPrivate.ZMaxInstanceSr _ Random.ChooseInt[selectStream, 1, numInstances];
RETURN[structureData.instances.inst[index]]};

GetIo: PROCEDURE [handle: SC.Handle, inst1: SCPrivate.Instance, selectStream: Random.RandomStream] RETURNS [inst2: SCPrivate.Instance _ NIL]= {
structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
numIOs: SCPrivate.ZMaxInstanceSr _ structureData.instances.numIOs;
index: SCPrivate.MaxInstanceSr;
IF numIOs <= 1 THEN RETURN;
WHILE inst2 = NIL OR inst1 = inst2 DO 
index _ Random.ChooseInt[selectStream, 1, numIOs];
IF index < 1 OR index > numIOs THEN SC.Signal[programmingError, "Invalid io exchange"];
inst2 _ structureData.instances.inst[index];
ENDLOOP;
IF inst2.whichClass # io THEN SC.Error[programmingError, "Invalid io instance"];
RETURN[inst2]};

GetLogic: PROCEDURE [handle: SC.Handle, inst1: SCPrivate.Instance, selectStream: Random.RandomStream] RETURNS [inst2: SCPrivate.Instance _ NIL]= {
structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
index: SCPrivate.MaxInstanceSr;
numIOs: SCPrivate.ZMaxInstanceSr _ structureData.instances.numIOs;
numInstances: SCPrivate.ZMaxInstanceSr _ structureData.instances.numLogics + numIOs;
IF numInstances - numIOs <= 1 THEN RETURN;
WHILE inst2 = NIL OR inst1 = inst2 DO 
index _ Random.ChooseInt[selectStream, numIOs + 1, numInstances];
IF index <= numIOs OR index > numInstances THEN SC.Signal[programmingError, NIL];
inst2 _ structureData.instances.inst[index];
ENDLOOP;
IF inst2.whichClass # logic THEN SC.Error[programmingError, "Invalid logic instance"];
RETURN[inst2]};

FullScore: PROCEDURE [handle: SC.Handle, trial: INT] RETURNS [score: REAL _ 0] = {

DoPin: SCNetUtil.EachPinProc = {
loc: RTBasic.PQPos _ SCInstUtil.InstPosOf[handle, netPin.instance, netPin.pin];
left _ MIN[left, loc.p];
bottom _ MIN[bottom, loc.q];
right _ MAX[right, loc.p];
top _ MAX[top, loc.q]};

ScoreNet: SCNetUtil.EachNetProc = {
right _ top _ -LAST[INT]; left _ bottom _ LAST[INT];
[] _ SCNetUtil.EnumeratePinsOnNet[net, DoPin];
net.oldScore _ net.score;
net.score _ (right - left) + (top - bottom);
score _ score + net.score;
net.updatedOnTrial _ trial};

right, top, left, bottom: SC.Number;
[] _ SCNetUtil.EnumerateNets[handle, ScoreNet]};

CheckScore: PROCEDURE [handle: SC.Handle, trial: INT] RETURNS [score: REAL _ 0] = {

DoPin: SCNetUtil.EachPinProc = {
loc: RTBasic.PQPos _ SCInstUtil.InstPosOf[handle, netPin.instance, netPin.pin];
left _ MIN[left, loc.p];
bottom _ MIN[bottom, loc.q];
right _ MAX[right, loc.p];
top _ MAX[top, loc.q]};

ScoreNet: SCNetUtil.EachNetProc = {
netScore: REAL;
right _ top _ -LAST[INT]; left _ bottom _ LAST[INT];

[] _ SCNetUtil.EnumeratePinsOnNet[net, DoPin];
netScore _ (right - left) + (top - bottom);
IF netScore # net.score THEN {
SC.Signal[programmingError, "Not suppose to happen."]};

net.score _ net.oldScore _ netScore;
score _ score + netScore;
net.updatedOnTrial _ trial};

right, top, left, bottom: SC.Number;
[] _ SCNetUtil.EnumerateNets[handle, ScoreNet]};

ModScore2: PROCEDURE [handle: SC.Handle, exch: ExchDescription, oldScore: REAL, trial: INT] RETURNS [score: REAL] = {

DoPin: SCNetUtil.EachPinProc = {
loc: RTBasic.PQPos _ SCInstUtil.InstPosOf[handle, netPin.instance, netPin.pin];
left _ MIN[left, loc.p];
bottom _ MIN[bottom, loc.q];
right _ MAX[right, loc.p];
top _ MAX[top, loc.q]};

EachPin: SCInstUtil.EachPinProc ~ {
net: SCPrivate.Net _ netPin.net;
IF net # NIL THEN {
IF net.updatedOnTrial # trial THEN {
right _ top _ -LAST[INT]; left _ bottom _ LAST[INT];
[] _ SCNetUtil.EnumeratePinsOnNet[net, DoPin];

net.oldScore _ net.score;
net.score _ (right - left) + (top - bottom);
score _ score + net.score - net.oldScore;

IF net.score < 0 THEN SC.Error[programmingError, "Not suppose to happen."];
net.updatedOnTrial _ trial}}};

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
right, top, left, bottom: SC.Number;
score _ oldScore;

SELECT exch.inst1.whichClass FROM
logic,ft  =>{
lgRow: SCPrivate.LgRow _ layoutData.lgRows.rows[exch.inst1.curRow];
FOR inst: NAT IN [1 .. lgRow.nLgsOnRow] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[lgRow.lgsOnRow[inst], EachPin];
ENDLOOP;
IF exch.inst1.curRow # exch.inst2.curRow THEN {
lgRow _ layoutData.lgRows.rows[exch.inst2.curRow];
FOR inst: NAT IN [1 .. lgRow.nLgsOnRow] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[lgRow.lgsOnRow[inst], EachPin];
ENDLOOP}};
io  =>{
bpRow: SCPrivate.BpRow _ layoutData.bpRows[exch.inst1.curSide];
FOR inst: NAT IN [1 .. bpRow.nBpsOnSide] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[bpRow.bpsOnSide[inst], EachPin];
ENDLOOP;
IF exch.inst1.curSide # exch.inst2.curSide THEN {
bpRow _ layoutData.bpRows[exch.inst2.curSide];
FOR inst: NAT IN [1 .. bpRow.nBpsOnSide] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[bpRow.bpsOnSide[inst], EachPin];
ENDLOOP}};
ENDCASE;

IF score < 0 THEN SC.Signal[programmingError, "Should not happen."]};

ModScore1: PROCEDURE [handle: SC.Handle, move: MoveDescription, oldScore: REAL, trial: INT] RETURNS [score: REAL] = {

DoPin: SCNetUtil.EachPinProc = {
loc: RTBasic.PQPos _ SCInstUtil.InstPosOf[handle, netPin.instance, netPin.pin];
left _ MIN[left, loc.p];
bottom _ MIN[bottom, loc.q];
right _ MAX[right, loc.p];
top _ MAX[top, loc.q]};

EachPin: SCInstUtil.EachPinProc ~ {
IF netPin.net # NIL THEN {
net: SCPrivate.Net _ netPin.net;
IF net.updatedOnTrial # trial THEN {
right _ top _ -LAST[INT]; left _ bottom _ LAST[INT];
[] _ SCNetUtil.EnumeratePinsOnNet[net, DoPin];

net.oldScore _ net.score;
net.score _ (right - left) + (top - bottom);
score _ score + net.score - net.oldScore;

IF net.score < 0 THEN SC.Error[programmingError, "Not suppose to happen."];
net.updatedOnTrial _ trial}}};

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
right, top, left, bottom: SC.Number;
score _ oldScore;

SELECT move.inst.whichClass FROM
logic, ft  =>{
lgRow: SCPrivate.LgRow _ layoutData.lgRows.rows[move.inst.curRow];
FOR inst: NAT IN [1 .. lgRow.nLgsOnRow] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[lgRow.lgsOnRow[inst], EachPin];
ENDLOOP;
IF move.inst.curRow # move.previousRow THEN {
lgRow _ layoutData.lgRows.rows[move.previousRow];
FOR inst: NAT IN [1 .. lgRow.nLgsOnRow] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[lgRow.lgsOnRow[inst], EachPin];
ENDLOOP}};
io  =>{
bpRow: SCPrivate.BpRow _ layoutData.bpRows[move.inst.curSide];
FOR inst: NAT IN [1 .. bpRow.nBpsOnSide] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[bpRow.bpsOnSide[inst], EachPin];
ENDLOOP;
IF move.inst.curSide # move.previousSide THEN {
bpRow _ layoutData.bpRows[move.previousSide];
FOR inst: NAT IN [1 .. bpRow.nBpsOnSide] DO 
[] _ SCInstUtil.EnumeratePinsOnInst[bpRow.bpsOnSide[inst], EachPin];
ENDLOOP}};
ENDCASE;

IF score < 0 THEN SC.Signal[programmingError, "Should not happen."]};

RestoreScore: PROCEDURE [handle: SC.Handle, oldScore: REAL, trial: INT] RETURNS [score: REAL] = {

ScoreNet: SCNetUtil.EachNetProc ~ {
IF net # NIL THEN {
IF net.updatedOnTrial = trial THEN {
score _ score + net.oldScore - net.score;
net.score _ net.oldScore}}};

score _ oldScore;
[] _ SCNetUtil.EnumerateNets[handle, ScoreNet];

IF score < 0 THEN SC.Signal[programmingError, "Should not happen."]};

InitStream: PROC [handle: SC.Handle, append, variables: Rope.ROPE] RETURNS [graph: FS.STREAM] ~ {
name: Rope.ROPE _ Rope.Cat[handle.name, append];
graph _ FS.StreamOpen[name, $create];
IO.PutRope[graph, Rope.Cat["-- file: ", name, "\n"]];
IO.Put[graph, IO.rope["-- created: "], IO.time[], IO.rope["\n"]];
IO.PutRope[graph, Rope.Cat["variables: \n\n", variables, "\nvalues:\n\n"]]};

ThrowDice: PROC [deltaScore, temprature: REAL, choiceStream: Random.RandomStream] RETURNS [BOOLEAN] ~ {

maxRandom: INT _ LAST[INT] - 1;  -- Ain't this a kicker?
random0To1: REAL _ Real.Float[Random.ChooseInt[choiceStream, 0, maxRandom]]/Real.Float[maxRandom];
RETURN[random0To1 < RealFns.Exp[-deltaScore / temprature]]};

SAInitialPlace: PUBLIC PROCEDURE [handle: SC.Handle, widthFactor: REAL, seed: INT] RETURNS [initialResult: SC.SAInitialResult] = {

structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
selectStream: Random.RandomStream _ Random.Create[LAST[INT], seed];
lgRows: SCPrivate.LgRows _ layoutData.lgRows;
exch: ExchDescription _ NEW[ExchDescriptionRec];
score: REAL;
stop: BOOLEAN _ FALSE;
rowWidthLimit: SC.Number _ Real.Round[layoutData.initTotWidth*widthFactor];
numTrials: INT _ structureData.instances.count+100;
cycles: INT _ 0;
initHandle: ScoreHandle _ NEW[ScoreHandleRec _ [
maxSize: MIN[tableSize, numTrials],
entry: NEW[RealArrayRec _ ALL[0.0]],
sum: NEW[RealArrayRec _ ALL[0.0]],
sumSq: NEW[RealArrayRec _ ALL[0.0]]]];

[lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle];
SCChanUtil.InitChanWidths[handle];
SCInstUtil.AsgnChanPos[handle];
score _ FullScore[handle, 0];

initialResult.numTotal _ initialResult.numDecrease _ initialResult.numIncrease _ initialResult.numNeutral _ 0;
initialResult.minScore _ initialResult.maxScore _ score;
initialResult.minDelta _ initialResult.maxDelta _ initialResult.avgDelta _ 0.0;

InitScoreHandle[initHandle, numTrials, numTrials];
UNTIL cycles >= numTrials OR stop DO
Select2[handle, selectStream, exch];
cycles _ cycles + 1;
IF Exchange[handle, exch, rowWidthLimit] THEN {
newScore, deltaScore: REAL;
initialResult.numTotal _ initialResult.numTotal + 1;
newScore _ IF exch.doSides THEN FullScore[handle, initialResult.numTotal] ELSE ModScore2[handle, exch, score, initialResult.numTotal];
deltaScore _ newScore - score;
IF deltaScore < 0 THEN {
score _ newScore;
initialResult.minScore _ MIN[initialResult.minScore, score];
initialResult.numDecrease _ initialResult.numDecrease + 1;
}
ELSE IF deltaScore > 0 THEN {
score _ newScore;
initialResult.maxScore _ MAX[initialResult.maxScore, score];
initialResult.maxDelta _ MAX[initialResult.maxDelta, deltaScore];
initialResult.minDelta _ MIN[initialResult.minDelta, deltaScore];
initialResult.avgDelta _ initialResult.avgDelta + deltaScore;
initialResult.numIncrease _ initialResult.numIncrease + 1;
}
ELSE { -- deltaScore = 0
initialResult.numNeutral _ initialResult.numNeutral + 1;
};
IncScoreHandle[newScore, initHandle]};
ENDLOOP;

IF initialResult.numTotal <= 0 THEN initialResult.avgDelta _ (initialResult.maxScore + initialResult.minScore)/2
ELSE initialResult.avgDelta _ initialResult.avgDelta/initialResult.numTotal;
initialResult.standardDeviation _ RealFns.SqRt[initHandle.variance];
TerminalIO.PutF["   total trials: %g,  final Score: %g\n", IO.int[initialResult.numTotal], IO.real[score]];
TerminalIO.PutF["   decreased: %g,  increased: %g,  neutral: %g\n",  IO.int[initialResult.numDecrease], IO.int[initialResult.numIncrease], IO.int[initialResult.numNeutral]];
TerminalIO.PutF["   min Score: %g,  max Score: %g\n", IO.real[initialResult.minScore], IO.real [initialResult.maxScore]];
TerminalIO.PutF["  min delta: %g,  max delta: %g,  avg delta: %g\n", IO.real[initialResult.minDelta], IO.real[initialResult.maxDelta], IO.real[initialResult.avgDelta]];
IF debug THEN SCPlaceUtil.WriteCurPlace[handle]};

SAGetParms: PUBLIC PROCEDURE [handle: SC.Handle, initialResult: SC.SAInitialResult, cellType: Core.CellType] RETURNS [saParms: SC.SAParms] = {

structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
investment: SC.HowLongToWork _ SCUtil.GetCoreInvestmentProp[cellType, SC.investmentProp];

SELECT investment FROM
veryLong => {
saParms.t0 _ IF initialResult.numTotal <= 0 THEN 0.0 ELSE -3*initialResult.standardDeviation/RealFns.Ln[0.9];
saParms.maxTStep _ 0.6; saParms.lambda _ 0.5;
saParms.tableSize _ 2*structureData.instances.count + 150;
saParms.limit _ structureData.instances.count + 150};
long => {
saParms.t0 _ IF initialResult.numTotal <= 0 THEN 0.0 ELSE -3*initialResult.standardDeviation/RealFns.Ln[0.875];
saParms.maxTStep _ 0.5; saParms.lambda _ 0.7;
saParms.tableSize _ 2*structureData.instances.count + 125;
saParms.limit _ structureData.instances.count + 125};
medium => {
saParms.t0 _ IF initialResult.numTotal <= 0 THEN 0.0 ELSE -3*initialResult.standardDeviation/RealFns.Ln[0.85];
saParms.maxTStep _ 0.5; saParms.lambda _ 0.7;
saParms.tableSize _ structureData.instances.count + 100;
saParms.limit _ structureData.instances.count + 100};
short => {
saParms.t0 _ IF initialResult.numTotal <= 0 THEN 0.0 ELSE -3*initialResult.standardDeviation/RealFns.Ln[0.825];
saParms.maxTStep _ 0.4; saParms.lambda _ 0.7;
saParms.tableSize _ structureData.instances.count/2 + 75;
saParms.limit _ structureData.instances.count/2 + 75};
ENDCASE => { -- no investment property or veryShort 
saParms.t0 _ IF initialResult.numTotal <= 0 THEN 0.0 ELSE -3*initialResult.standardDeviation/RealFns.Ln[0.8];
saParms.maxTStep _ 0.3; saParms.lambda _ 0.8;
saParms.tableSize _ structureData.instances.count/2 + 50;
saParms.limit _ structureData.instances.count/2 + 50};

saParms.t0 _ RTCoreUtil.GetCoreRealProp[cellType, SC.t0SA, saParms.t0];
saParms.maxTStep _ RTCoreUtil.GetCoreRealProp[cellType, SC.maxTStepSA, saParms.maxTStep];
saParms.lambda _ RTCoreUtil.GetCoreRealProp[cellType, SC.lambdaSA, saParms.lambda];
saParms.tableSize _ MIN[tableSize, RTCoreUtil.GetCoreIntProp[cellType, SC.tableSizeSA, saParms.tableSize]];
saParms.limit _ MIN[tableSize, RTCoreUtil.GetCoreIntProp[cellType, SC.limitSA, saParms.limit]]};

SAPlaceImprove: PUBLIC PROCEDURE [handle: SC.Handle, saParms: SC.SAParms, widthFactor: REAL, seed: INT] = {

InitNewTemp: PROCEDURE [] = {
TerminalIO.PutF["Temp: %g\n", IO.real[temprature]];
numTotal _ numDecrease _ numIncrease _ numNeutral _ 0;
minScore _ maxScore _ score _ CheckScore[handle, numTotal];
maxChange _ 0.0;};

FinishTemp: PROCEDURE [sh: ScoreHandle] = {
IF verbose THEN {
TerminalIO.PutRope[Rope.Cat[Rope.Cat["   Trials: tot: ", Convert.RopeFromInt[numTotal]], Rope.Cat["   dec: ", Convert.RopeFromInt[numDecrease], ",   inc: ", Convert.RopeFromInt[numIncrease]], Rope.Cat[",  neut: ", Convert.RopeFromInt[numNeutral], ",  rej: ", Convert.RopeFromInt[numTotal - numDecrease - numIncrease - numNeutral], "\n"]]];
TerminalIO.PutRope[Rope.Cat[Rope.Cat["   Scores: fin: ", Convert.RopeFromReal[score]], Rope.Cat[", min: ", Convert.RopeFromReal[minScore],  ",   max: ", Convert.RopeFromReal[maxScore]], Rope.Cat[",   mean: ", Convert.RopeFromReal[sh.mean], "\n"]]]};
IF ~RealFns.AlmostZero[temprature, -80] THEN {
IO.PutRope[graph, Rope.Cat[Convert.RopeFromReal[RealFns.Ln[temprature]], "  ", Convert.RopeFromReal[minScore],  "  "]];
IO.PutRope[graph, Rope.Cat[Convert.RopeFromReal[sh.mean], "  ", Convert.RopeFromReal[maxScore], "\n"]]}};

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
lgRows: SCPrivate.LgRows _ layoutData.lgRows;
selectStream: Random.RandomStream _ Random.Create[LAST[INT], seed];
choiceStream: Random.RandomStream _ Random.Create[LAST[INT], seed];
exch: ExchDescription _ NEW[ExchDescriptionRec];
startArea: SC.Number;
temprature: REAL _ saParms.t0;
equilibriumHandle: ScoreHandle _ NEW[ScoreHandleRec _ [
maxSize: tableSize,
entry: NEW[RealArrayRec _ ALL[0.0]],
sum: NEW[RealArrayRec _ ALL[0.0]],
sumSq: NEW[RealArrayRec _ ALL[0.0]]]];
numTotal, numDecrease, numIncrease, numNeutral: INT _ 0;
minScore, maxChange: REAL _ 0.0;
maxScore: REAL _ 1000000.0;  -- just needs to be # 0
score: REAL;
graph: FS.STREAM _ InitStream[handle, "SA.list", "\"Temp\" \"Min Score\" \"Mean Score\" \"Max Score\""];
stop: BOOLEAN _ FALSE;
rowWidthLimit: SC.Number _ Real.Round[layoutData.initTotWidth*widthFactor];

[lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle];
SCChanUtil.InitChanWidths[handle];
SCInstUtil.AsgnChanPos[handle];
score _ FullScore[handle, numTotal];

startArea _ SCUtil.WriteResults["Simulated annealing placement improvement\n starting area:", handle, 0];
TerminalIO.PutF1["Starting score: %g\n", IO.real[score]];
TerminalIO.PutF["Starting parameters:\n    t0: %g, maxTStep: %g, lambda: %g, table Size: %g, limit: %g\n", IO.real[saParms.t0], IO.real[saParms.maxTStep], IO.real[saParms.lambda], IO.int[saParms.tableSize], IO.int[saParms.limit]];

UNTIL Frozen[maxScore, minScore, maxChange] OR stop DO
InitScoreHandle[equilibriumHandle, saParms.tableSize, saParms.limit];
InitNewTemp[];
UNTIL Equilibrium[score, equilibriumHandle] OR stop DO
Select2[handle, selectStream, exch];
IF Exchange[handle, exch, rowWidthLimit] THEN {
trialScore, deltaScore: REAL;
numTotal _ numTotal + 1;
trialScore _ IF exch.doSides THEN FullScore[handle, numTotal] ELSE ModScore2[handle, exch, score, numTotal];
deltaScore _ trialScore - score;
IF deltaScore < 0 THEN {
score _ trialScore;
minScore _ MIN[minScore, score];
maxChange _ MAX[maxChange, ABS[score - trialScore]];
numDecrease _ numDecrease + 1;
}
ELSE IF deltaScore > 0 THEN {
accept: BOOLEAN;
accept _ ThrowDice[deltaScore, temprature, choiceStream ! Real.RealException => {accept _ FALSE; CONTINUE}];
IF accept THEN {
score _ trialScore;
maxScore _ MAX[maxScore, score];
maxChange _ MAX[maxChange, ABS[score - trialScore]];
numIncrease _ numIncrease + 1;
}
ELSE {
didIt: BOOLEAN _ Exchange[handle, exch, LAST[INT]];
restoredScore: REAL _ RestoreScore[handle, trialScore, numTotal];
IF ~RealFns.AlmostEqual[restoredScore, score, -15]  OR ~didIt THEN { 
TerminalIO.PutF["Loss of REAL precision fixed, restored:  %g, original: %g\n", IO.real[restoredScore], IO.real[score]];
score _ FullScore[handle, numTotal];
}}}
ELSE { -- deltaScore = 0
numNeutral _ numNeutral + 1;
}};
ENDLOOP;
FinishTemp[equilibriumHandle];
temprature _ NewTemp[temprature, equilibriumHandle.variance, saParms];
ENDLOOP;

SCInstUtil.AllOffsets[handle];
[lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle];
SCChanUtil.InitChanWidths[handle];
SCInstUtil.AsgnChanPos[handle];

TerminalIO.PutF1["Ending score: %g\n", IO.real[score]];
[] _ SCUtil.WriteResults["End placement improvement\n ending area:", handle, startArea];
IO.Flush[graph];
IO.Close[graph];
IF debug THEN SCPlaceUtil.WriteCurPlace[handle]};

SAPlaceImproveM: PUBLIC PROCEDURE [handle: SC.Handle, saParms: SC.SAParms, widthFactor: REAL, seed: INT] = {

InitNewTemp: PROCEDURE [] = {
TerminalIO.PutF["Temp: %g\n", IO.real[temprature]];
numTotal _ numDecrease _ numIncrease _ numNeutral _ 0;
minScore _ maxScore _ score _ CheckScore[handle, numTotal];
maxChange _ 0.0;};

FinishTemp: PROCEDURE [sh: ScoreHandle] = {
IF verbose THEN {
TerminalIO.PutRope[Rope.Cat[Rope.Cat["   Trials: tot: ", Convert.RopeFromInt[numTotal]], Rope.Cat["   dec: ", Convert.RopeFromInt[numDecrease], ",   inc: ", Convert.RopeFromInt[numIncrease]], Rope.Cat[",  neut: ", Convert.RopeFromInt[numNeutral], ",  rej: ", Convert.RopeFromInt[numTotal - numDecrease - numIncrease - numNeutral], "\n"]]];
TerminalIO.PutRope[Rope.Cat[Rope.Cat["   Scores: fin: ", Convert.RopeFromReal[score]], Rope.Cat[", min: ", Convert.RopeFromReal[minScore],  ",   max: ", Convert.RopeFromReal[maxScore]], Rope.Cat[",   mean: ", Convert.RopeFromReal[sh.mean], "\n"]]]};
IF ~RealFns.AlmostZero[temprature, -80] THEN {
IO.PutRope[graph, Rope.Cat[Convert.RopeFromReal[RealFns.Ln[temprature]], "  ", Convert.RopeFromReal[minScore],  "  "]];
IO.PutRope[graph, Rope.Cat[Convert.RopeFromReal[sh.mean], "  ", Convert.RopeFromReal[maxScore], "\n"]]}};

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
lgRows: SCPrivate.LgRows _ layoutData.lgRows;
selectStream: Random.RandomStream _ Random.Create[LAST[INT], seed];
choiceStream: Random.RandomStream _ Random.Create[LAST[INT], seed];
move: MoveDescription _ NEW[MoveDescriptionRec];
shell: MoveDescription _ NEW[MoveDescriptionRec];
startArea: SC.Number;
temprature: REAL _ saParms.t0;
equilibriumHandle: ScoreHandle _ NEW[ScoreHandleRec _ [
maxSize: tableSize,
entry: NEW[RealArrayRec _ ALL[0.0]],
sum: NEW[RealArrayRec _ ALL[0.0]],
sumSq: NEW[RealArrayRec _ ALL[0.0]]]];
numTotal, numDecrease, numIncrease, numNeutral: INT _ 0;
minScore, maxChange: REAL _ 0.0;
maxScore: REAL _ 1000000.0;  -- just needs to be # 0
score: REAL;
graph: FS.STREAM _ InitStream[handle, "SA.list", "\"Temp\" \"Min Score\" \"Mean Score\" \"Max Score\""];
stop: BOOLEAN _ FALSE;
rowWidthLimit: SC.Number _ Real.Round[layoutData.initTotWidth*widthFactor];

[lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle];
SCChanUtil.InitChanWidths[handle];
SCInstUtil.AsgnChanPos[handle];

score _ FullScore[handle, numTotal];
startArea _ SCUtil.WriteResults["Simulated annealing placement improvement\n starting area:", handle, 0];
TerminalIO.PutF1["Starting score: %g\n", IO.real[score]];
TerminalIO.PutF["Starting parameters:\n    t0: %g, maxTStep: %g, lambda: %g, table Size: %g, limit: %g\n", IO.real[saParms.t0], IO.real[saParms.maxTStep], IO.real[saParms.lambda], IO.int[saParms.tableSize], IO.int[saParms.limit]];

UNTIL Frozen[maxScore, minScore, maxChange] OR stop DO
InitScoreHandle[equilibriumHandle, saParms.tableSize, saParms.limit];
InitNewTemp[];
UNTIL Equilibrium[score, equilibriumHandle] OR stop DO
Select1[handle, selectStream, move];
IF Move[handle, move, rowWidthLimit] THEN {
trialScore, deltaScore: REAL;
IF move.doSides THEN numTotal _ numTotal;
numTotal _ numTotal + 1;
trialScore _ IF move.doSides THEN FullScore[handle, numTotal] ELSE ModScore1[handle, move, score, numTotal];
deltaScore _ trialScore - score;
IF deltaScore < 0 THEN { -- score decreased
score _ trialScore;
minScore _ MIN[minScore, score];
maxChange _ MAX[maxChange, ABS[score - trialScore]];
numDecrease _ numDecrease + 1;
}
ELSE IF deltaScore > 0 THEN { -- score increased
accept: BOOLEAN;
accept _ ThrowDice[deltaScore, temprature, choiceStream ! Real.RealException => {accept _ FALSE; CONTINUE}];
IF accept THEN { -- accept an increased score
score _ trialScore;
maxScore _ MAX[maxScore, score];
maxChange _ MAX[maxChange, ABS[score - trialScore]];
numIncrease _ numIncrease + 1;
}
ELSE { -- reject increased score, restore previous placement
didIt: BOOLEAN _ Restore[handle, move, shell];
restoredScore: REAL _ RestoreScore[handle, trialScore, numTotal];
IF ~RealFns.AlmostEqual[restoredScore, score, -15]  OR ~didIt THEN { 
TerminalIO.PutF["Loss of REAL precision fixed, restored:  %g, original: %g\n", IO.real[restoredScore], IO.real[score]];
score _ FullScore[handle, numTotal];
}}}
ELSE { -- deltaScore = 0
numNeutral _ numNeutral + 1;
};
};
ENDLOOP;
FinishTemp[equilibriumHandle];
temprature _ NewTemp[temprature, equilibriumHandle.variance, saParms];
ENDLOOP;

SCInstUtil.AllOffsets[handle];
[lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle];
SCChanUtil.InitChanWidths[handle];
SCInstUtil.AsgnChanPos[handle];

TerminalIO.PutRope[Rope.Cat["Ending score: ", Convert.RopeFromReal[score], "\n"]];
[] _ SCUtil.WriteResults["End placement improvement\n ending area:", handle, startArea];
IO.Flush[graph];
IO.Close[graph];
IF debug THEN SCPlaceUtil.WriteCurPlace[handle]};

PlaceImprove: PUBLIC PROCEDURE [handle: SC.Handle, maxCycles: INT] = {

EachSide: SCRowUtil.EachSideProc ~ {
EachIOInstance: SCRowUtil.EachInstProc ~ {

IF pos <  bpRow.nBpsOnSide THEN {
exch.inst1 _ instance; exch.inst2 _ bpRow.bpsOnSide[pos+1];
DoExchange[exch]}};

[] _ SCRowUtil.EnumerateAllInstsOnSide[handle, side, EachIOInstance]};

EachRow: SCRowUtil.EachRowProc ~ {
EachLogicInstance: SCRowUtil.EachInstProc ~ {

IF pos <  lgRow.nLgsOnRow THEN {
exch.inst1 _ instance; exch.inst2 _ lgRow.lgsOnRow[pos+1];
DoExchange[exch]}};

[] _ SCRowUtil.EnumerateAllInstsOnRow[handle, row, EachLogicInstance]};

DoExchange: PROC [exch: ExchDescription] ~ {
IF Exchange[handle, exch, LAST[INT]] THEN {
trialScore, deltaScore: REAL;
numTotal _ numTotal + 1;
trialScore _ ModScore2[handle, exch, score, numTotal];
deltaScore _ trialScore - score;
IF deltaScore < 0 THEN {
score _ trialScore;
numDecrease _ numDecrease + 1;
}
ELSE IF deltaScore > 0 THEN {
didIt: BOOLEAN _ Exchange[handle, exch, LAST[INT]];
restoredScore: REAL _ RestoreScore[handle, trialScore, numTotal];
IF ~RealFns.AlmostEqual[restoredScore, score, -15]  OR ~didIt THEN { 
TerminalIO.PutRope[Rope.Cat["Loss of REAL precision fixed:  ", Convert.RopeFromReal[restoredScore], ", ", Convert.RopeFromReal[score]]];
score _ FullScore[handle, numTotal];
}}
ELSE { -- deltaScore = 0
numNeutral _ numNeutral + 1;
};
}};

layoutData: SCPrivate.LayoutData _ NARROW[handle.layoutData];
structureData: SCPrivate.StructureData _ NARROW[handle.structureData];
lgRows: SCPrivate.LgRows _ layoutData.lgRows;
exch: ExchDescription _ NEW[ExchDescriptionRec];
startArea: SC.Number;
numTotal, numDecrease, numNeutral: INT _ 0;
score: REAL;
stop: BOOLEAN _ FALSE;
numCycles: INT _ 0;
endIOs: SCPrivate.MaxInstanceSr _ structureData.instances.numIOs;
endLogics: SCPrivate.MaxInstanceSr _ endIOs + structureData.instances.numLogics;

[lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle];
SCChanUtil.InitChanWidths[handle];
SCInstUtil.AsgnChanPos[handle];
score _ FullScore[handle, numTotal];

startArea _ SCUtil.WriteResults["Pairwise placement improvement\n starting area:", handle, 0];
TerminalIO.PutRope[Rope.Cat["Starting score: ", Convert.RopeFromReal[score], "\n"]];

UNTIL stop DO
IF numCycles >= maxCycles THEN EXIT;

[] _ SCRowUtil.EnumerateRows[handle, EachRow];

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

numCycles _ numCycles + 1;
ENDLOOP;

SCInstUtil.AllOffsets[handle];
[lgRows.maxRowWidth, lgRows.numMaxRows] _ SCRowUtil.FindMaxRow[handle];
SCChanUtil.InitChanWidths[handle];
SCInstUtil.AsgnChanPos[handle];

TerminalIO.PutRope[Rope.Cat["Ending score: ", Convert.RopeFromReal[score], "\n"]];
[] _ SCUtil.WriteResults["End placement improvement\n ending area:", handle, startArea];
IF debug THEN SCPlaceUtil.WriteCurPlace[handle]};

NewTemp: PROC [temprature, sigmaSq: REAL, saParms: SC.SAParms] RETURNS [REAL] ~ {

exponent, boundTemprature, computedTemprature: REAL;
returnZero: BOOLEAN _ FALSE;
sigma: REAL _ RealFns.SqRt[sigmaSq];
boundTemprature _ Real.FMul[temprature, saParms.maxTStep ! Real.RealException => {boundTemprature _ 0.0; CONTINUE}];
IF RealFns.AlmostZero[sigma, -15] THEN RETURN[boundTemprature];
exponent _ Real.FDiv[Real.FMul[saParms.lambda, temprature], sigma];
computedTemprature _ Real.FMul[RealFns.Exp[-exponent], temprature ! Real.RealException => {returnZero _ TRUE; computedTemprature _ 0.0; CONTINUE}];
-- TerminalIO.PutRope[Rope.Cat["Temp: bound: ", Convert.RopeFromReal[boundTemprature], ", computed: ", Convert.RopeFromReal[computedTemprature], "\n"]];
IF returnZero THEN RETURN[0.0];
RETURN[MAX[boundTemprature, computedTemprature]]};

SCRandomTest: PUBLIC PROCEDURE [handle: SC.Handle, trials, seed: INT] = {

StorePair: PROCEDURE [exch: ExchDescription] = {
inst1[exch.inst1.num] _ inst1[exch.inst1.num] +1;
inst2[exch.inst2.num] _ inst2[exch.inst2.num] +1;
IO.PutRope[scatterGraph, Rope.Cat[Convert.RopeFromInt[exch.inst1.num], "  ", Convert.RopeFromInt[exch.inst2.num],  "\n"]]};

WriteDat: PROCEDURE [] = {
EachInst: SCInstUtil.EachInstanceProc ~ {
IO.PutRope[histGraph, Rope.Cat[Convert.RopeFromInt[instance.num], "  "]];
IO.PutRope[histGraph, Rope.Cat[Convert.RopeFromInt[inst1[instance.num]], "  ", Convert.RopeFromInt[inst2[instance.num]],  "\n"]]};

[] _ SCInstUtil.EnumerateAllInstances[handle, EachInst]};

selectStream: Random.RandomStream _ Random.Create[LAST[INT], seed];
choiceStream: Random.RandomStream _ Random.Create[LAST[INT], seed];
exch: ExchDescription _ NEW[ExchDescriptionRec];
inst1: InstCounts _ NEW[InstCountsRec];
inst2: InstCounts _ NEW[InstCountsRec];
numTotal: INT _ 0;
histGraph: FS.STREAM _ InitStream[handle, "Random.list", "\"Bin\" \"Instance 1\" \"Instance 2\""];
scatterGraph: FS.STREAM _ InitStream[handle, "Scatter.list", "\"Instance 1\" \"Instance 2\""];
stop: BOOLEAN _ FALSE;

TerminalIO.PutRope[Rope.Cat["Random Test: ", "\n"]];

UNTIL numTotal > trials OR stop DO
Select2[handle, selectStream, exch];
IF Exchange[handle, exch, LAST[INT]] THEN {
numTotal _ numTotal + 1;
StorePair[exch]};
ENDLOOP;

WriteDat[];
TerminalIO.PutRope["End Random Test\n"];
IO.Flush[histGraph];
IO.Close[histGraph];
IO.Flush[scatterGraph];
IO.Close[scatterGraph];
};

}.
Vfile: SCSAPlaceImpl.mesa
Copyright c 1986, 1987 by Xerox Corporation. All rights reserved.
Preas, April 22, 1987 0:30:47 am PDT
initialize the score data
increment the score data with a new score
determine if the simulated annealing process can be stopped
determine if the simulated annealing process is in equilibrum
select two instances of the same type to exchange
select one instances to move
no constraint check for now
IF inst1.whichClass # inst2.whichClass THEN SC.Error[programmingError, "Invalid exchange selection."];
IF debug THEN TerminalIO.PutRope[Rope.Cat["Exchange ", inst1.name, " and ", inst2.name, "\n"]];
restore to a previous placement
reuse shell to prevent excessive garbage collection
move an instance to create a new placement
IF debug THEN TerminalIO.PutRope[Rope.Cat["Exchange ", inst1.name, " and ", inst2.name, "\n"]];
score all of the nets in the design
score all of the nets in the design and check against the previous

NB: This procedure accounts for 75% of the placement time!   It MUST be efficient;  hence, the stilted style.
Compute the new score for the placement by enumerating the altered nets.
determine the bounding box of the pins on the net
-- PROC [instance: SCPrivate.Instance, pin: NAT, netPin: SCPrivate.PinNet] RETURNS [quit: BOOL _ FALSE];
evaluate the nets attached to the pins

NB: This procedure accounts for 75% of the placement time!   It MUST be efficient;  hence, the stilted style.
Compute the new score for the placement by enumerating the altered nets.
determine the bounding box of the pins on the net
evaluate the nets attached to the pins
Restore the previous score for the placement by enumerating the altered nets.
Efficiency dictates the stilted stucture.
find an initial placement for the design.  This is done by assuming an infinitly high temprature
IF newScore # CheckScore[handle, initialResult.numTotal] THEN SC.Signal[programmingError, "Should not happen."];
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Score decreased: ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[",  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Score increased ", Convert.RopeFromReal[trialScore], ", accepted"]];
TerminalIO.PutRope[Rope.Cat[",  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Neutral exchange accepted:  ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[".  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
determine parameters for simulated placement.
change any values that have explicit properties
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Score decreased: ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[",  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
accept an increased score
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Score increased ", Convert.RopeFromReal[trialScore], ", accepted"]];
TerminalIO.PutRope[Rope.Cat[",  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
reject increased score, restore previous placement
SC.Signal[other, "Loss of precision."];
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Neutral exchange accepted:  ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[".  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Score decreased: ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[",  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Score increased ", Convert.RopeFromReal[trialScore], ", accepted"]];
TerminalIO.PutRope[Rope.Cat[",  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
SC.Signal[other, "Loss of precision."];
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Neutral exchange accepted:  ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[".  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
IF score # CheckScore[handle, numTotal] THEN SC.Signal[other, "Loss of precision."]
PROC [side: SC.Side, bpRow: SCPrivate.BpRow] RETURNS [quit: BOOL _ FALSE];
PROC [pos: NAT, instance: SCPrivate.Instance] RETURNS [quit: BOOL _ FALSE];
exchange this instance and the one on its right
interchange the instances on side
PROC [row: SCPrivate.MaxRowSr, lgRow: SCPrivate.LgRow] RETURNS [quit: BOOL _ FALSE];
PROC [pos: NAT, instance: SCPrivate.Instance] RETURNS [quit: BOOL _ FALSE];
exchange this instance and the one on its right
interchange the instances on row
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Score decreased: ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[",  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
reject increased score, restore previous placement
SC.Signal[other, "Loss of precision."];
IF debug THEN {
TerminalIO.PutRope[Rope.Cat["Neutral exchange accepted:  ", Convert.RopeFromReal[trialScore]]];
TerminalIO.PutRope[Rope.Cat[".  Exchange ", exch.inst1.name, " and ", exch.inst2.name, "\n"]]}
IF score # CheckScore[handle, numTotal] THEN SC.Signal[other, "Loss of precision."]
echange the adjacent logics
echange the IOs
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