Ryujinx/Ryujinx.Graphics.Shader/Translation/Optimizations/GlobalToStorage.cs

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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using System.Collections.Generic;
namespace Ryujinx.Graphics.Shader.Translation.Optimizations
{
static class GlobalToStorage
{
private const int StorageDescsBaseOffset = 0x44; // In words.
private const int StorageDescSize = 4; // In words.
private const int StorageMaxCount = 16;
private const int StorageDescsSize = StorageDescSize * StorageMaxCount;
public static void RunPass(BasicBlock block, ShaderStage stage)
{
int sbStart = GetStorageBaseCbOffset(stage);
int sbEnd = sbStart + StorageDescsSize;
for (LinkedListNode<INode> node = block.Operations.First; node != null; node = node.Next)
{
if (!(node.Value is Operation operation))
{
continue;
}
if (operation.Inst.IsAtomic() ||
operation.Inst == Instruction.LoadGlobal ||
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operation.Inst == Instruction.StoreGlobal)
{
Operand source = operation.GetSource(0);
if (source.AsgOp is Operation asgOperation)
{
int storageIndex = SearchForStorageBase(asgOperation, sbStart, sbEnd);
if (storageIndex >= 0)
{
node = ReplaceGlobalWithStorage(node, storageIndex);
}
}
}
}
}
private static LinkedListNode<INode> ReplaceGlobalWithStorage(LinkedListNode<INode> node, int storageIndex)
{
Operation operation = (Operation)node.Value;
Operation storageOp;
if (operation.Inst.IsAtomic())
{
Operand[] sources = new Operand[operation.SourcesCount];
for (int index = 0; index < operation.SourcesCount; index++)
{
sources[index] = operation.GetSource(index);
}
Instruction inst = (operation.Inst & ~Instruction.MrMask) | Instruction.MrStorage;
storageOp = new Operation(inst, storageIndex, operation.Dest, sources);
}
else if (operation.Inst == Instruction.LoadGlobal)
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{
Operand source = operation.GetSource(0);
storageOp = new Operation(Instruction.LoadStorage, storageIndex, operation.Dest, source);
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}
else
{
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
storageOp = new Operation(Instruction.StoreStorage, storageIndex, null, src1, src2);
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}
for (int index = 0; index < operation.SourcesCount; index++)
{
operation.SetSource(index, null);
}
LinkedListNode<INode> oldNode = node;
node = node.List.AddAfter(node, storageOp);
node.List.Remove(oldNode);
return node;
}
private static int SearchForStorageBase(Operation operation, int sbStart, int sbEnd)
{
Queue<Operation> assignments = new Queue<Operation>();
assignments.Enqueue(operation);
while (assignments.TryDequeue(out operation))
{
for (int index = 0; index < operation.SourcesCount; index++)
{
Operand source = operation.GetSource(index);
if (source.Type == OperandType.ConstantBuffer)
{
int slot = source.GetCbufSlot();
int offset = source.GetCbufOffset();
if (slot == 0 && offset >= sbStart && offset < sbEnd)
{
int storageIndex = (offset - sbStart) / StorageDescSize;
return storageIndex;
}
}
if (source.AsgOp is Operation asgOperation)
{
assignments.Enqueue(asgOperation);
}
}
}
return -1;
}
public static int GetStorageCbOffset(ShaderStage stage, int slot)
{
return GetStorageBaseCbOffset(stage) + slot * StorageDescSize;
}
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private static int GetStorageBaseCbOffset(ShaderStage stage)
{
switch (stage)
{
case ShaderStage.Compute: return StorageDescsBaseOffset + 2 * StorageDescsSize;
case ShaderStage.Vertex: return StorageDescsBaseOffset;
case ShaderStage.TessellationControl: return StorageDescsBaseOffset + 1 * StorageDescsSize;
case ShaderStage.TessellationEvaluation: return StorageDescsBaseOffset + 2 * StorageDescsSize;
case ShaderStage.Geometry: return StorageDescsBaseOffset + 3 * StorageDescsSize;
case ShaderStage.Fragment: return StorageDescsBaseOffset + 4 * StorageDescsSize;
}
return 0;
}
}
}