diff options
| author | gdk <gab.dark.100@gmail.com> | 2019-10-13 03:02:07 -0300 |
|---|---|---|
| committer | Thog <thog@protonmail.com> | 2020-01-09 02:13:00 +0100 |
| commit | 1876b346fea647e8284a66bb6d62c38801035cff (patch) | |
| tree | 6eeff094298cda84d1613dc5ec0691e51d7b35f1 /Ryujinx.Graphics.Shader/StructuredIr/StructuredProgram.cs | |
| parent | f617fb542a0e3d36012d77a4b5acbde7b08902f2 (diff) | |
Initial work
Diffstat (limited to 'Ryujinx.Graphics.Shader/StructuredIr/StructuredProgram.cs')
| -rw-r--r-- | Ryujinx.Graphics.Shader/StructuredIr/StructuredProgram.cs | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Shader/StructuredIr/StructuredProgram.cs b/Ryujinx.Graphics.Shader/StructuredIr/StructuredProgram.cs new file mode 100644 index 00000000..dc822621 --- /dev/null +++ b/Ryujinx.Graphics.Shader/StructuredIr/StructuredProgram.cs @@ -0,0 +1,281 @@ +using Ryujinx.Graphics.Shader.IntermediateRepresentation; +using System; +using System.Collections.Generic; + +namespace Ryujinx.Graphics.Shader.StructuredIr +{ + static class StructuredProgram + { + public static StructuredProgramInfo MakeStructuredProgram(BasicBlock[] blocks, ShaderConfig config) + { + PhiFunctions.Remove(blocks); + + StructuredProgramContext context = new StructuredProgramContext(blocks.Length, config); + + for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++) + { + BasicBlock block = blocks[blkIndex]; + + context.EnterBlock(block); + + foreach (INode node in block.Operations) + { + Operation operation = (Operation)node; + + if (IsBranchInst(operation.Inst)) + { + context.LeaveBlock(block, operation); + } + else + { + AddOperation(context, operation); + } + } + } + + GotoElimination.Eliminate(context.GetGotos()); + + AstOptimizer.Optimize(context); + + return context.Info; + } + + private static void AddOperation(StructuredProgramContext context, Operation operation) + { + Instruction inst = operation.Inst; + + IAstNode[] sources = new IAstNode[operation.SourcesCount]; + + for (int index = 0; index < sources.Length; index++) + { + sources[index] = context.GetOperandUse(operation.GetSource(index)); + } + + if (operation.Dest != null) + { + AstOperand dest = context.GetOperandDef(operation.Dest); + + if (inst == Instruction.LoadConstant) + { + Operand slot = operation.GetSource(0); + + if (slot.Type != OperandType.Constant) + { + throw new InvalidOperationException("Found load with non-constant constant buffer slot."); + } + + context.Info.CBuffers.Add(slot.Value); + } + else if (inst == Instruction.LoadStorage) + { + Operand slot = operation.GetSource(0); + + if (slot.Type != OperandType.Constant) + { + throw new InvalidOperationException("Found load or store with non-constant storage buffer slot."); + } + + context.Info.SBuffers.Add(slot.Value); + } + + AstAssignment assignment; + + // If all the sources are bool, it's better to use short-circuiting + // logical operations, rather than forcing a cast to int and doing + // a bitwise operation with the value, as it is likely to be used as + // a bool in the end. + if (IsBitwiseInst(inst) && AreAllSourceTypesEqual(sources, VariableType.Bool)) + { + inst = GetLogicalFromBitwiseInst(inst); + } + + bool isCondSel = inst == Instruction.ConditionalSelect; + bool isCopy = inst == Instruction.Copy; + + if (isCondSel || isCopy) + { + VariableType type = GetVarTypeFromUses(operation.Dest); + + if (isCondSel && type == VariableType.F32) + { + inst |= Instruction.FP; + } + + dest.VarType = type; + } + else + { + dest.VarType = InstructionInfo.GetDestVarType(inst); + } + + int componentMask = 1 << operation.ComponentIndex; + + IAstNode source; + + if (operation is TextureOperation texOp) + { + AstTextureOperation astTexOp = new AstTextureOperation( + inst, + texOp.Target, + texOp.Flags, + texOp.Handle, + componentMask, + sources); + + context.Info.Samplers.Add(astTexOp); + + source = astTexOp; + } + else if (!isCopy) + { + source = new AstOperation(inst, componentMask, sources); + } + else + { + source = sources[0]; + } + + assignment = new AstAssignment(dest, source); + + context.AddNode(assignment); + } + else if (operation.Inst == Instruction.Comment) + { + context.AddNode(new AstComment(((CommentNode)operation).Comment)); + } + else + { + if (inst == Instruction.StoreStorage) + { + Operand slot = operation.GetSource(0); + + if (slot.Type != OperandType.Constant) + { + throw new InvalidOperationException("Found load or store with non-constant storage buffer slot."); + } + + context.Info.SBuffers.Add(slot.Value); + } + + context.AddNode(new AstOperation(inst, sources)); + } + } + + private static VariableType GetVarTypeFromUses(Operand dest) + { + HashSet<Operand> visited = new HashSet<Operand>(); + + Queue<Operand> pending = new Queue<Operand>(); + + bool Enqueue(Operand operand) + { + if (visited.Add(operand)) + { + pending.Enqueue(operand); + + return true; + } + + return false; + } + + Enqueue(dest); + + while (pending.TryDequeue(out Operand operand)) + { + foreach (INode useNode in operand.UseOps) + { + if (!(useNode is Operation operation)) + { + continue; + } + + if (operation.Inst == Instruction.Copy) + { + if (operation.Dest.Type == OperandType.LocalVariable) + { + if (Enqueue(operation.Dest)) + { + break; + } + } + else + { + return OperandInfo.GetVarType(operation.Dest.Type); + } + } + else + { + for (int index = 0; index < operation.SourcesCount; index++) + { + if (operation.GetSource(index) == operand) + { + return InstructionInfo.GetSrcVarType(operation.Inst, index); + } + } + } + } + } + + return VariableType.S32; + } + + private static bool AreAllSourceTypesEqual(IAstNode[] sources, VariableType type) + { + foreach (IAstNode node in sources) + { + if (!(node is AstOperand operand)) + { + return false; + } + + if (operand.VarType != type) + { + return false; + } + } + + return true; + } + + private static bool IsBranchInst(Instruction inst) + { + switch (inst) + { + case Instruction.Branch: + case Instruction.BranchIfFalse: + case Instruction.BranchIfTrue: + return true; + } + + return false; + } + + private static bool IsBitwiseInst(Instruction inst) + { + switch (inst) + { + case Instruction.BitwiseAnd: + case Instruction.BitwiseExclusiveOr: + case Instruction.BitwiseNot: + case Instruction.BitwiseOr: + return true; + } + + return false; + } + + private static Instruction GetLogicalFromBitwiseInst(Instruction inst) + { + switch (inst) + { + case Instruction.BitwiseAnd: return Instruction.LogicalAnd; + case Instruction.BitwiseExclusiveOr: return Instruction.LogicalExclusiveOr; + case Instruction.BitwiseNot: return Instruction.LogicalNot; + case Instruction.BitwiseOr: return Instruction.LogicalOr; + } + + throw new ArgumentException($"Unexpected instruction \"{inst}\"."); + } + } +}
\ No newline at end of file |