private boolean isSinlgeReturnBlock(Block block) {
if (block.isBlockBasic()) {
BlockBasic basic = (BlockBasic) block;
if (basic.getInstructions().size() == 1) {
Instruction instruction = basic.getInstructions().get(0);
if (instruction.isInstReturn()) {
return true;
}
}
}
return false;
}
@Override
public Void caseAction(Action action) {
// FIXME: Do not detect a pathological case for the moment,
// extra clock cycles
for (Port port : action.getOutputPattern().getPorts()) {
int size = action.getOutputPattern().getNumTokensMap().get(port);
if (size > 1) {
Var newVar = newPortToVarMap.get(port);
Var var = action.getOutputPattern().getPortToVarMap().get(port);
EList<Use> uses = var.getUses();
while (!uses.isEmpty()) {
uses.get(0).setVariable(newVar);
}
EList<Def> defs = var.getDefs();
while (!defs.isEmpty()) {
defs.get(0).setVariable(newVar);
}
// Create the Block while for the repeat
BlockWhile whileBlock = IrFactory.eINSTANCE.createBlockWhile();
whileBlock.setJoinBlock(IrFactory.eINSTANCE.createBlockBasic());
// Create the condition
Type type = IrFactory.eINSTANCE.createTypeInt(32);
Var index = IrFactory.eINSTANCE.createVar(type, "rp_Index_" + port.getName(), true, 0);
action.getBody().getLocals().add(index);
ExprVar condE0 = IrFactory.eINSTANCE.createExprVar(index);
ExprInt condE1 = IrFactory.eINSTANCE.createExprInt(size);
ExprBinary whileCond =
IrFactory.eINSTANCE.createExprBinary(
condE0, OpBinary.LT, condE1, IrFactory.eINSTANCE.createTypeBool());
whileBlock.setCondition(whileCond);
// Create an if block with a pin Status as condition
Var pinStatus =
IrFactory.eINSTANCE.createVar(
IrFactory.eINSTANCE.createTypeBool(), "portStatus_" + port.getName(), true, 0);
action.getBody().getLocals().add(pinStatus);
// Add portStatus to the first block of the while
BlockBasic firstWhileBlock = IrFactory.eINSTANCE.createBlockBasic();
InstPortStatus portStatus = XronosIrUtil.createInstPortStatus(pinStatus, port);
firstWhileBlock.add(portStatus);
whileBlock.getBlocks().add(firstWhileBlock);
BlockIf blockIf = IrFactory.eINSTANCE.createBlockIf();
blockIf.setJoinBlock(IrFactory.eINSTANCE.createBlockBasic());
ExprVar ifCond = IrFactory.eINSTANCE.createExprVar(pinStatus);
blockIf.setCondition(ifCond);
// -----------------------------------------------------------
// Then Block
// Create While blockBasic
BlockBasic thenBlock = IrFactory.eINSTANCE.createBlockBasic();
// Create a Load instruction
Type tmpLoadType = IrUtil.copy(port.getType());
Var tmpLoad =
IrFactory.eINSTANCE.createVar(tmpLoadType, "tmp_rp_" + port.getName(), true, 0);
action.getBody().getLocals().add(tmpLoad);
ExprVar loadIndex = IrFactory.eINSTANCE.createExprVar(index);
InstLoad load =
IrFactory.eINSTANCE.createInstLoad(
tmpLoad, newVar, Arrays.asList((Expression) loadIndex));
thenBlock.add(load);
// Create the Port Write instruction
InstPortWrite portWrite = XronosIrUtil.createInstPortWrite(port, tmpLoad, false);
thenBlock.add(portWrite);
// Create the instruction assign with index++
ExprVar assignE0 = IrFactory.eINSTANCE.createExprVar(index);
ExprInt assignE1 = IrFactory.eINSTANCE.createExprInt(1);
ExprBinary assignValue =
IrFactory.eINSTANCE.createExprBinary(
assignE0, OpBinary.PLUS, assignE1, IrFactory.eINSTANCE.createTypeInt());
InstAssign assignIndex = IrFactory.eINSTANCE.createInstAssign(index, assignValue);
thenBlock.add(assignIndex);
// -----------------------------------------------------------
// Add to thenBlocks the thenBlock
blockIf.getThenBlocks().add(thenBlock);
// Add the ifBlock to the Block While
whileBlock.getBlocks().add(blockIf);
// Create a Block Basic with rp_Index_ to 0
BlockBasic initRpIndex = IrFactory.eINSTANCE.createBlockBasic();
InstAssign rpAssignZero = IrFactory.eINSTANCE.createInstAssign(index, 0);
initRpIndex.add(rpAssignZero);
// Add the BlockWhile to the body of the procedure
int indexBlock = action.getBody().getBlocks().size();
Block lastBlock = action.getBody().getBlocks().get(indexBlock - 1);
if (isSinlgeReturnBlock(lastBlock)) {
action.getBody().getBlocks().add(indexBlock - 1, initRpIndex);
action.getBody().getBlocks().add(indexBlock, whileBlock);
} else {
if (lastBlock.isBlockBasic()) {
BlockBasic basic = (BlockBasic) lastBlock;
int instrSize = basic.getInstructions().size();
if (basic.getInstructions().get(instrSize - 1).isInstReturn()) {
Instruction returnInst = basic.getInstructions().get(instrSize - 1);
BlockBasic newLastBlock = IrFactory.eINSTANCE.createBlockBasic();
newLastBlock.add(returnInst);
action.getBody().getBlocks().add(initRpIndex);
action.getBody().getBlocks().add(whileBlock);
action.getBody().getBlocks().add(newLastBlock);
}
}
}
}
}
return null;
}