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422 lines
15 KiB
C#
422 lines
15 KiB
C#
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
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using System.Collections.Generic;
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using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
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using static Ryujinx.Graphics.Shader.Translation.GlobalMemory;
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namespace Ryujinx.Graphics.Shader.Translation.Optimizations
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{
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static class GlobalToStorage
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{
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public static void RunPass(BasicBlock block, ShaderConfig config, ref int sbUseMask)
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{
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int sbStart = GetStorageBaseCbOffset(config.Stage);
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int sbEnd = sbStart + StorageDescsSize;
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for (LinkedListNode<INode> node = block.Operations.First; node != null; node = node.Next)
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{
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for (int index = 0; index < node.Value.SourcesCount; index++)
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{
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Operand src = node.Value.GetSource(index);
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int storageIndex = GetStorageIndex(src, sbStart, sbEnd);
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if (storageIndex >= 0)
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{
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sbUseMask |= 1 << storageIndex;
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}
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}
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if (!(node.Value is Operation operation))
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{
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continue;
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}
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if (UsesGlobalMemory(operation.Inst))
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{
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Operand source = operation.GetSource(0);
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int storageIndex = SearchForStorageBase(block, source, sbStart, sbEnd);
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if (storageIndex >= 0)
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{
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// Storage buffers are implemented using global memory access.
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// If we know from where the base address of the access is loaded,
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// we can guess which storage buffer it is accessing.
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// We can then replace the global memory access with a storage
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// buffer access.
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node = ReplaceGlobalWithStorage(block, node, config, storageIndex);
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}
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else if (config.Stage == ShaderStage.Compute && operation.Inst == Instruction.LoadGlobal)
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{
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// Here we effectively try to replace a LDG instruction with LDC.
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// The hardware only supports a limited amount of constant buffers
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// so NVN "emulates" more constant buffers using global memory access.
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// Here we try to replace the global access back to a constant buffer
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// load.
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storageIndex = SearchForStorageBase(block, source, UbeBaseOffset, UbeBaseOffset + UbeDescsSize);
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if (storageIndex >= 0)
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{
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node = ReplaceLdgWithLdc(node, config, storageIndex);
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}
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}
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}
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}
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config.SetAccessibleStorageBuffersMask(sbUseMask);
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}
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private static LinkedListNode<INode> ReplaceGlobalWithStorage(BasicBlock block, LinkedListNode<INode> node, ShaderConfig config, int storageIndex)
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{
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Operation operation = (Operation)node.Value;
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bool isAtomic = operation.Inst.IsAtomic();
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bool isStg16Or8 = operation.Inst == Instruction.StoreGlobal16 || operation.Inst == Instruction.StoreGlobal8;
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bool isWrite = isAtomic || operation.Inst == Instruction.StoreGlobal || isStg16Or8;
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config.SetUsedStorageBuffer(storageIndex, isWrite);
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Operand[] sources = new Operand[operation.SourcesCount];
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sources[0] = Const(storageIndex);
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sources[1] = GetStorageOffset(block, node, config, storageIndex, operation.GetSource(0), isStg16Or8);
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for (int index = 2; index < operation.SourcesCount; index++)
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{
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sources[index] = operation.GetSource(index);
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}
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Operation storageOp;
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if (isAtomic)
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{
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Instruction inst = (operation.Inst & ~Instruction.MrMask) | Instruction.MrStorage;
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storageOp = new Operation(inst, operation.Dest, sources);
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}
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else if (operation.Inst == Instruction.LoadGlobal)
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{
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storageOp = new Operation(Instruction.LoadStorage, operation.Dest, sources);
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}
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else
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{
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Instruction storeInst = operation.Inst switch
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{
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Instruction.StoreGlobal16 => Instruction.StoreStorage16,
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Instruction.StoreGlobal8 => Instruction.StoreStorage8,
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_ => Instruction.StoreStorage
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};
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storageOp = new Operation(storeInst, null, sources);
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}
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for (int index = 0; index < operation.SourcesCount; index++)
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{
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operation.SetSource(index, null);
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}
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LinkedListNode<INode> oldNode = node;
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node = node.List.AddBefore(node, storageOp);
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node.List.Remove(oldNode);
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return node;
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}
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private static Operand GetStorageOffset(
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BasicBlock block,
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LinkedListNode<INode> node,
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ShaderConfig config,
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int storageIndex,
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Operand addrLow,
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bool isStg16Or8)
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{
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int baseAddressCbOffset = GetStorageCbOffset(config.Stage, storageIndex);
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bool storageAligned = !(config.GpuAccessor.QueryHasUnalignedStorageBuffer() || config.GpuAccessor.QueryHostStorageBufferOffsetAlignment() > Constants.StorageAlignment);
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(Operand byteOffset, int constantOffset) = storageAligned ?
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GetStorageOffset(block, Utils.FindLastOperation(addrLow, block), baseAddressCbOffset) :
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(null, 0);
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if (byteOffset != null)
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{
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ReplaceAddressAlignment(node.List, addrLow, byteOffset, constantOffset);
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}
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if (byteOffset == null)
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{
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Operand baseAddrLow = Cbuf(0, baseAddressCbOffset);
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Operand baseAddrTrunc = Local();
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Operand alignMask = Const(-config.GpuAccessor.QueryHostStorageBufferOffsetAlignment());
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Operation andOp = new Operation(Instruction.BitwiseAnd, baseAddrTrunc, baseAddrLow, alignMask);
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node.List.AddBefore(node, andOp);
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Operand offset = Local();
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Operation subOp = new Operation(Instruction.Subtract, offset, addrLow, baseAddrTrunc);
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node.List.AddBefore(node, subOp);
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byteOffset = offset;
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}
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else if (constantOffset != 0)
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{
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Operand offset = Local();
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Operation addOp = new Operation(Instruction.Add, offset, byteOffset, Const(constantOffset));
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node.List.AddBefore(node, addOp);
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byteOffset = offset;
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}
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if (isStg16Or8)
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{
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return byteOffset;
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}
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Operand wordOffset = Local();
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Operation shrOp = new Operation(Instruction.ShiftRightU32, wordOffset, byteOffset, Const(2));
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node.List.AddBefore(node, shrOp);
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return wordOffset;
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}
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private static bool IsCb0Offset(Operand operand, int offset)
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{
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return operand.Type == OperandType.ConstantBuffer && operand.GetCbufSlot() == 0 && operand.GetCbufOffset() == offset;
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}
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private static void ReplaceAddressAlignment(LinkedList<INode> list, Operand address, Operand byteOffset, int constantOffset)
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{
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// When we emit 16/8-bit LDG, we add extra code to determine the address alignment.
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// Eliminate the storage buffer base address from this too, leaving only the byte offset.
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foreach (INode useNode in address.UseOps)
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{
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if (useNode is Operation op && op.Inst == Instruction.BitwiseAnd)
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{
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Operand src1 = op.GetSource(0);
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Operand src2 = op.GetSource(1);
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int addressIndex = -1;
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if (src1 == address && src2.Type == OperandType.Constant && src2.Value == 3)
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{
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addressIndex = 0;
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}
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else if (src2 == address && src1.Type == OperandType.Constant && src1.Value == 3)
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{
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addressIndex = 1;
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}
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if (addressIndex != -1)
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{
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LinkedListNode<INode> node = list.Find(op);
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// Add offset calculation before the use. Needs to be on the same block.
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if (node != null)
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{
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Operand offset = Local();
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Operation addOp = new Operation(Instruction.Add, offset, byteOffset, Const(constantOffset));
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list.AddBefore(node, addOp);
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op.SetSource(addressIndex, offset);
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}
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}
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}
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}
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}
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private static (Operand, int) GetStorageOffset(BasicBlock block, Operand address, int baseAddressCbOffset)
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{
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if (IsCb0Offset(address, baseAddressCbOffset))
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{
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// Direct offset: zero.
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return (Const(0), 0);
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}
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(address, int constantOffset) = GetStorageConstantOffset(block, address);
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address = Utils.FindLastOperation(address, block);
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if (IsCb0Offset(address, baseAddressCbOffset))
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{
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// Only constant offset
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return (Const(0), constantOffset);
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}
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if (!(address.AsgOp is Operation offsetAdd) || offsetAdd.Inst != Instruction.Add)
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{
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return (null, 0);
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}
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Operand src1 = offsetAdd.GetSource(0);
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Operand src2 = Utils.FindLastOperation(offsetAdd.GetSource(1), block);
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if (IsCb0Offset(src2, baseAddressCbOffset))
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{
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return (src1, constantOffset);
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}
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else if (IsCb0Offset(src1, baseAddressCbOffset))
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{
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return (src2, constantOffset);
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}
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return (null, 0);
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}
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private static (Operand, int) GetStorageConstantOffset(BasicBlock block, Operand address)
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{
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if (!(address.AsgOp is Operation offsetAdd) || offsetAdd.Inst != Instruction.Add)
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{
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return (address, 0);
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}
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Operand src1 = offsetAdd.GetSource(0);
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Operand src2 = offsetAdd.GetSource(1);
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if (src2.Type != OperandType.Constant)
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{
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return (address, 0);
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}
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return (src1, src2.Value);
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}
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private static LinkedListNode<INode> ReplaceLdgWithLdc(LinkedListNode<INode> node, ShaderConfig config, int storageIndex)
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{
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Operation operation = (Operation)node.Value;
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Operand GetCbufOffset()
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{
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Operand addrLow = operation.GetSource(0);
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Operand baseAddrLow = Cbuf(0, UbeBaseOffset + storageIndex * StorageDescSize);
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Operand baseAddrTrunc = Local();
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Operand alignMask = Const(-config.GpuAccessor.QueryHostStorageBufferOffsetAlignment());
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Operation andOp = new Operation(Instruction.BitwiseAnd, baseAddrTrunc, baseAddrLow, alignMask);
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node.List.AddBefore(node, andOp);
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Operand byteOffset = Local();
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Operand wordOffset = Local();
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Operation subOp = new Operation(Instruction.Subtract, byteOffset, addrLow, baseAddrTrunc);
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Operation shrOp = new Operation(Instruction.ShiftRightU32, wordOffset, byteOffset, Const(2));
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node.List.AddBefore(node, subOp);
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node.List.AddBefore(node, shrOp);
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return wordOffset;
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}
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Operand[] sources = new Operand[operation.SourcesCount];
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int cbSlot = UbeFirstCbuf + storageIndex;
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sources[0] = Const(cbSlot);
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sources[1] = GetCbufOffset();
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config.SetUsedConstantBuffer(cbSlot);
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for (int index = 2; index < operation.SourcesCount; index++)
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{
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sources[index] = operation.GetSource(index);
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}
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Operation ldcOp = new Operation(Instruction.LoadConstant, operation.Dest, sources);
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for (int index = 0; index < operation.SourcesCount; index++)
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{
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operation.SetSource(index, null);
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}
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LinkedListNode<INode> oldNode = node;
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node = node.List.AddBefore(node, ldcOp);
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node.List.Remove(oldNode);
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return node;
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}
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private static int SearchForStorageBase(BasicBlock block, Operand globalAddress, int sbStart, int sbEnd)
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{
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globalAddress = Utils.FindLastOperation(globalAddress, block);
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if (globalAddress.Type == OperandType.ConstantBuffer)
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{
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return GetStorageIndex(globalAddress, sbStart, sbEnd);
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}
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Operation operation = globalAddress.AsgOp as Operation;
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if (operation == null || operation.Inst != Instruction.Add)
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{
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return -1;
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}
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Operand src1 = operation.GetSource(0);
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Operand src2 = operation.GetSource(1);
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if ((src1.Type == OperandType.LocalVariable && src2.Type == OperandType.Constant) ||
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(src2.Type == OperandType.LocalVariable && src1.Type == OperandType.Constant))
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{
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if (src1.Type == OperandType.LocalVariable)
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{
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operation = Utils.FindLastOperation(src1, block).AsgOp as Operation;
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}
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else
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{
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operation = Utils.FindLastOperation(src2, block).AsgOp as Operation;
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}
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if (operation == null || operation.Inst != Instruction.Add)
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{
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return -1;
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}
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}
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for (int index = 0; index < operation.SourcesCount; index++)
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{
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Operand source = operation.GetSource(index);
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int storageIndex = GetStorageIndex(source, sbStart, sbEnd);
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if (storageIndex != -1)
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{
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return storageIndex;
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}
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}
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return -1;
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}
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private static int GetStorageIndex(Operand operand, int sbStart, int sbEnd)
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{
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if (operand.Type == OperandType.ConstantBuffer)
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{
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int slot = operand.GetCbufSlot();
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int offset = operand.GetCbufOffset();
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if (slot == 0 && offset >= sbStart && offset < sbEnd)
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{
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int storageIndex = (offset - sbStart) / StorageDescSize;
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return storageIndex;
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}
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}
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return -1;
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}
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}
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} |