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using System;
namespace Ryujinx.Graphics.Shader.IntermediateRepresentation
{
class Operation : INode
{
public Instruction Inst { get; private set; }
private Operand _dest;
public Operand Dest
{
get => _dest;
set => _dest = AssignDest(value);
}
private Operand[] _sources;
public int SourcesCount => _sources.Length;
public int Index { get; }
public Operation(Instruction inst, Operand dest, params Operand[] sources)
{
Inst = inst;
Dest = dest;
// The array may be modified externally, so we store a copy.
_sources = (Operand[])sources.Clone();
for (int index = 0; index < _sources.Length; index++)
{
Operand source = _sources[index];
if (source.Type == OperandType.LocalVariable)
{
source.UseOps.Add(this);
}
}
}
public Operation(
Instruction inst,
int index,
Operand dest,
params Operand[] sources) : this(inst, dest, sources)
{
Index = index;
}
public void AppendOperands(params Operand[] operands)
{
int startIndex = _sources.Length;
Array.Resize(ref _sources, startIndex + operands.Length);
for (int index = 0; index < operands.Length; index++)
{
Operand source = operands[index];
if (source.Type == OperandType.LocalVariable)
{
source.UseOps.Add(this);
}
_sources[startIndex + index] = source;
}
}
private Operand AssignDest(Operand dest)
{
if (dest != null && dest.Type == OperandType.LocalVariable)
{
dest.AsgOp = this;
}
return dest;
}
public Operand GetSource(int index)
{
return _sources[index];
}
public void SetSource(int index, Operand source)
{
Operand oldSrc = _sources[index];
if (oldSrc != null && oldSrc.Type == OperandType.LocalVariable)
{
oldSrc.UseOps.Remove(this);
}
if (source != null && source.Type == OperandType.LocalVariable)
{
source.UseOps.Add(this);
}
_sources[index] = source;
}
protected void RemoveSource(int index)
{
SetSource(index, null);
Operand[] newSources = new Operand[_sources.Length - 1];
Array.Copy(_sources, 0, newSources, 0, index);
Array.Copy(_sources, index + 1, newSources, index, _sources.Length - (index + 1));
_sources = newSources;
}
public void TurnIntoCopy(Operand source)
{
TurnInto(Instruction.Copy, source);
}
public void TurnInto(Instruction newInst, Operand source)
{
Inst = newInst;
foreach (Operand oldSrc in _sources)
{
if (oldSrc != null && oldSrc.Type == OperandType.LocalVariable)
{
oldSrc.UseOps.Remove(this);
}
}
if (source.Type == OperandType.LocalVariable)
{
source.UseOps.Add(this);
}
_sources = new Operand[] { source };
}
}
}
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