public ILEmitterCtx(
MemoryManager memory,
TranslatorCache cache,
TranslatorQueue queue,
TranslationTier tier,
Block graph)
{
Memory = memory ?? throw new ArgumentNullException(nameof(memory));
_cache = cache ?? throw new ArgumentNullException(nameof(cache));
_queue = queue ?? throw new ArgumentNullException(nameof(queue));
_currBlock = graph ?? throw new ArgumentNullException(nameof(graph));
Tier = tier;
_labels = new Dictionary <long, ILLabel>();
_visitedBlocks = new Dictionary <Block, ILBlock>();
_visitedBlocks.Add(graph, new ILBlock());
_branchTargets = new Queue <Block>();
_ilBlocks = new List <ILBlock>();
_subPosition = graph.Position;
ResetBlockState();
if (AdvanceOpCode())
{
EmitSynchronization();
_ilBlock.Add(new ILOpCodeLoadState(_ilBlock, isSubEntry: true));
}
}
private void EmitOpCode()
{
if (_currBlock == null)
{
return;
}
if (_opcIndex == 0)
{
MarkLabel(GetLabel(_currBlock.Position));
EmitSynchronization();
}
//On AARCH32 mode, (almost) all instruction can be conditionally
//executed, and the required condition is encoded on the opcode.
//We handle that here, skipping the instruction if the condition
//is not met. We can just ignore it when the condition is "Always",
//because in this case the instruction is always going to be executed.
//Condition "Never" is also ignored because this is a special encoding
//used by some unconditional instructions.
ILLabel lblSkip = null;
if (CurrOp is OpCode32 op && op.Cond < Condition.Al)
{
lblSkip = new ILLabel();
EmitCondBranch(lblSkip, GetInverseCond(op.Cond));
}
CurrOp.Emitter(this);
if (lblSkip != null)
{
MarkLabel(lblSkip);
//If this is the last op on the block, and there's no "next" block
//after this one, then we have to return right now, with the address
//of the next instruction to be executed (in the case that the condition
//is false, and the branch was not taken, as all basic blocks should end with
//some kind of branch).
if (CurrOp == CurrBlock.GetLastOp() && CurrBlock.Next == null)
{
EmitStoreState();
EmitLdc_I8(CurrOp.Position + CurrOp.OpCodeSizeInBytes);
Emit(OpCodes.Ret);
}
}
_ilBlock.Add(new ILBarrier());
}
public void EmitOpCode()
{
if (_opcIndex == 0)
{
MarkLabel(GetLabel(CurrBlock.Position));
EmitSynchronization();
}
CurrOp.Emitter(this);
_ilBlock.Add(new ILBarrier());
}
private void EmitOpCode()
{
if (_currBlock == null)
{
return;
}
if (_opcIndex == 0)
{
MarkLabel(GetLabel(_currBlock.Position));
EmitSynchronization();
}
CurrOp.Emitter(this);
_ilBlock.Add(new ILBarrier());
}