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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using System;
using System.Collections.Generic;
using System.Linq;
namespace Ryujinx.Graphics.Shader.Decoders
{
class PushOpInfo
{
public InstOp Op { get; }
public Dictionary<Block, Operand> Consumers;
public PushOpInfo(InstOp op)
{
Op = op;
Consumers = new Dictionary<Block, Operand>();
}
}
readonly struct SyncTarget
{
public PushOpInfo PushOpInfo { get; }
public int PushOpId { get; }
public SyncTarget(PushOpInfo pushOpInfo, int pushOpId)
{
PushOpInfo = pushOpInfo;
PushOpId = pushOpId;
}
}
class Block
{
public ulong Address { get; set; }
public ulong EndAddress { get; set; }
public List<Block> Predecessors { get; }
public List<Block> Successors { get; }
public List<InstOp> OpCodes { get; }
public List<PushOpInfo> PushOpCodes { get; }
public Dictionary<ulong, SyncTarget> SyncTargets { get; }
public Block(ulong address)
{
Address = address;
Predecessors = new List<Block>();
Successors = new List<Block>();
OpCodes = new List<InstOp>();
PushOpCodes = new List<PushOpInfo>();
SyncTargets = new Dictionary<ulong, SyncTarget>();
}
public void Split(Block rightBlock)
{
int splitIndex = BinarySearch(OpCodes, rightBlock.Address);
if (OpCodes[splitIndex].Address < rightBlock.Address)
{
splitIndex++;
}
int splitCount = OpCodes.Count - splitIndex;
if (splitCount <= 0)
{
throw new ArgumentException("Can't split at right block address.");
}
rightBlock.EndAddress = EndAddress;
rightBlock.Successors.AddRange(Successors);
rightBlock.Predecessors.Add(this);
EndAddress = rightBlock.Address;
Successors.Clear();
Successors.Add(rightBlock);
// Move ops.
rightBlock.OpCodes.AddRange(OpCodes.GetRange(splitIndex, splitCount));
OpCodes.RemoveRange(splitIndex, splitCount);
// Update push consumers that points to this block.
foreach (SyncTarget syncTarget in SyncTargets.Values)
{
PushOpInfo pushOpInfo = syncTarget.PushOpInfo;
Operand local = pushOpInfo.Consumers[this];
pushOpInfo.Consumers.Remove(this);
pushOpInfo.Consumers.Add(rightBlock, local);
}
foreach ((ulong key, SyncTarget value) in SyncTargets)
{
rightBlock.SyncTargets.Add(key, value);
}
SyncTargets.Clear();
// Move push ops.
for (int i = 0; i < PushOpCodes.Count; i++)
{
if (PushOpCodes[i].Op.Address >= rightBlock.Address)
{
int count = PushOpCodes.Count - i;
rightBlock.PushOpCodes.AddRange(PushOpCodes.Skip(i));
PushOpCodes.RemoveRange(i, count);
break;
}
}
}
private static int BinarySearch(List<InstOp> opCodes, ulong address)
{
int left = 0;
int middle = 0;
int right = opCodes.Count - 1;
while (left <= right)
{
int size = right - left;
middle = left + (size >> 1);
InstOp opCode = opCodes[middle];
if (address == opCode.Address)
{
break;
}
if (address < opCode.Address)
{
right = middle - 1;
}
else
{
left = middle + 1;
}
}
return middle;
}
public InstOp GetLastOp()
{
if (OpCodes.Count != 0)
{
return OpCodes[^1];
}
return default;
}
public bool HasNext()
{
InstOp lastOp = GetLastOp();
return OpCodes.Count != 0 && !Decoder.IsUnconditionalBranch(ref lastOp);
}
public void AddPushOp(InstOp op)
{
PushOpCodes.Add(new PushOpInfo(op));
}
}
}
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