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using System.Collections.Generic;
namespace ChocolArm64.Translation
{
class ILBlock : IILEmit
{
public long IntInputs { get; private set; }
public long IntOutputs { get; private set; }
private long _intAwOutputs;
public long VecInputs { get; private set; }
public long VecOutputs { get; private set; }
private long _vecAwOutputs;
public bool HasStateStore { get; private set; }
private List<IILEmit> _emitters;
public int Count => _emitters.Count;
public ILBlock Next { get; set; }
public ILBlock Branch { get; set; }
public ILBlock()
{
_emitters = new List<IILEmit>();
}
public void Add(IILEmit emitter)
{
if (emitter is ILBarrier)
{
//Those barriers are used to separate the groups of CIL
//opcodes emitted by each ARM instruction.
//We can only consider the new outputs for doing input elimination
//after all the CIL opcodes used by the instruction being emitted.
_intAwOutputs = IntOutputs;
_vecAwOutputs = VecOutputs;
}
else if (emitter is ILOpCodeLoad ld && ILMethodBuilder.IsRegIndex(ld.Index))
{
switch (ld.VarType)
{
case VarType.Flag: IntInputs |= ((1L << ld.Index) << 32) & ~_intAwOutputs; break;
case VarType.Int: IntInputs |= (1L << ld.Index) & ~_intAwOutputs; break;
case VarType.Vector: VecInputs |= (1L << ld.Index) & ~_vecAwOutputs; break;
}
}
else if (emitter is ILOpCodeStore st && ILMethodBuilder.IsRegIndex(st.Index))
{
switch (st.VarType)
{
case VarType.Flag: IntOutputs |= (1L << st.Index) << 32; break;
case VarType.Int: IntOutputs |= 1L << st.Index; break;
case VarType.Vector: VecOutputs |= 1L << st.Index; break;
}
}
else if (emitter is ILOpCodeStoreState)
{
HasStateStore = true;
}
_emitters.Add(emitter);
}
public void Emit(ILMethodBuilder context)
{
foreach (IILEmit ilEmitter in _emitters)
{
ilEmitter.Emit(context);
}
}
}
}
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