1 files changed, 409 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Shader/CodeGen/Spirv/CodeGenContext.cs b/src/Ryujinx.Graphics.Shader/CodeGen/Spirv/CodeGenContext.cs
new file mode 100644
index 00000000..ed292ef1
--- /dev/null
+++ b/src/Ryujinx.Graphics.Shader/CodeGen/Spirv/CodeGenContext.cs
@@ -0,0 +1,409 @@
+using Ryujinx.Graphics.Shader.StructuredIr;
+using Ryujinx.Graphics.Shader.Translation;
+using Spv.Generator;
+using System;
+using System.Collections.Generic;
+using static Spv.Specification;
+
+namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
+{
+    using IrConsts = IntermediateRepresentation.IrConsts;
+    using IrOperandType = IntermediateRepresentation.OperandType;
+
+    partial class CodeGenContext : Module
+    {
+        private const uint SpirvVersionMajor = 1;
+        private const uint SpirvVersionMinor = 3;
+        private const uint SpirvVersionRevision = 0;
+        private const uint SpirvVersionPacked = (SpirvVersionMajor << 16) | (SpirvVersionMinor << 8) | SpirvVersionRevision;
+
+        public StructuredProgramInfo Info { get; }
+
+        public ShaderConfig Config { get; }
+
+        public int InputVertices { get; }
+
+        public Dictionary<int, Instruction> UniformBuffers { get; } = new Dictionary<int, Instruction>();
+        public Instruction SupportBuffer { get; set; }
+        public Instruction UniformBuffersArray { get; set; }
+        public Instruction StorageBuffersArray { get; set; }
+        public Instruction LocalMemory { get; set; }
+        public Instruction SharedMemory { get; set; }
+        public Dictionary<TextureMeta, SamplerType> SamplersTypes { get; } = new Dictionary<TextureMeta, SamplerType>();
+        public Dictionary<TextureMeta, (Instruction, Instruction, Instruction)> Samplers { get; } = new Dictionary<TextureMeta, (Instruction, Instruction, Instruction)>();
+        public Dictionary<TextureMeta, (Instruction, Instruction)> Images { get; } = new Dictionary<TextureMeta, (Instruction, Instruction)>();
+        public Dictionary<IoDefinition, Instruction> Inputs { get; } = new Dictionary<IoDefinition, Instruction>();
+        public Dictionary<IoDefinition, Instruction> Outputs { get; } = new Dictionary<IoDefinition, Instruction>();
+        public Dictionary<IoDefinition, Instruction> InputsPerPatch { get; } = new Dictionary<IoDefinition, Instruction>();
+        public Dictionary<IoDefinition, Instruction> OutputsPerPatch { get; } = new Dictionary<IoDefinition, Instruction>();
+
+        public Instruction CoordTemp { get; set; }
+        private readonly Dictionary<AstOperand, Instruction> _locals = new Dictionary<AstOperand, Instruction>();
+        private readonly Dictionary<int, Instruction[]> _localForArgs = new Dictionary<int, Instruction[]>();
+        private readonly Dictionary<int, Instruction> _funcArgs = new Dictionary<int, Instruction>();
+        private readonly Dictionary<int, (StructuredFunction, Instruction)> _functions = new Dictionary<int, (StructuredFunction, Instruction)>();
+
+        private class BlockState
+        {
+            private int _entryCount;
+            private readonly List<Instruction> _labels = new List<Instruction>();
+
+            public Instruction GetNextLabel(CodeGenContext context)
+            {
+                return GetLabel(context, _entryCount);
+            }
+
+            public Instruction GetNextLabelAutoIncrement(CodeGenContext context)
+            {
+                return GetLabel(context, _entryCount++);
+            }
+
+            public Instruction GetLabel(CodeGenContext context, int index)
+            {
+                while (index >= _labels.Count)
+                {
+                    _labels.Add(context.Label());
+                }
+
+                return _labels[index];
+            }
+        }
+
+        private readonly Dictionary<AstBlock, BlockState> _labels = new Dictionary<AstBlock, BlockState>();
+
+        public Dictionary<AstBlock, (Instruction, Instruction)> LoopTargets { get; set; }
+
+        public AstBlock CurrentBlock { get; private set; }
+
+        public SpirvDelegates Delegates { get; }
+
+        public CodeGenContext(
+            StructuredProgramInfo info,
+            ShaderConfig config,
+            GeneratorPool<Instruction> instPool,
+            GeneratorPool<LiteralInteger> integerPool) : base(SpirvVersionPacked, instPool, integerPool)
+        {
+            Info = info;
+            Config = config;
+
+            if (config.Stage == ShaderStage.Geometry)
+            {
+                InputTopology inPrimitive = config.GpuAccessor.QueryPrimitiveTopology();
+
+                InputVertices = inPrimitive switch
+                {
+                    InputTopology.Points => 1,
+                    InputTopology.Lines => 2,
+                    InputTopology.LinesAdjacency => 2,
+                    InputTopology.Triangles => 3,
+                    InputTopology.TrianglesAdjacency => 3,
+                    _ => throw new InvalidOperationException($"Invalid input topology \"{inPrimitive}\".")
+                };
+            }
+
+            AddCapability(Capability.Shader);
+            AddCapability(Capability.Float64);
+
+            SetMemoryModel(AddressingModel.Logical, MemoryModel.GLSL450);
+
+            Delegates = new SpirvDelegates(this);
+        }
+
+        public void StartFunction()
+        {
+            _locals.Clear();
+            _localForArgs.Clear();
+            _funcArgs.Clear();
+        }
+
+        public void EnterBlock(AstBlock block)
+        {
+            CurrentBlock = block;
+            AddLabel(GetBlockStateLazy(block).GetNextLabelAutoIncrement(this));
+        }
+
+        public Instruction GetFirstLabel(AstBlock block)
+        {
+            return GetBlockStateLazy(block).GetLabel(this, 0);
+        }
+
+        public Instruction GetNextLabel(AstBlock block)
+        {
+            return GetBlockStateLazy(block).GetNextLabel(this);
+        }
+
+        private BlockState GetBlockStateLazy(AstBlock block)
+        {
+            if (!_labels.TryGetValue(block, out var blockState))
+            {
+                blockState = new BlockState();
+
+                _labels.Add(block, blockState);
+            }
+
+            return blockState;
+        }
+
+        public Instruction NewBlock()
+        {
+            var label = Label();
+            Branch(label);
+            AddLabel(label);
+            return label;
+        }
+
+        public Instruction[] GetMainInterface()
+        {
+            var mainInterface = new List<Instruction>();
+
+            mainInterface.AddRange(Inputs.Values);
+            mainInterface.AddRange(Outputs.Values);
+            mainInterface.AddRange(InputsPerPatch.Values);
+            mainInterface.AddRange(OutputsPerPatch.Values);
+
+            return mainInterface.ToArray();
+        }
+
+        public void DeclareLocal(AstOperand local, Instruction spvLocal)
+        {
+            _locals.Add(local, spvLocal);
+        }
+
+        public void DeclareLocalForArgs(int funcIndex, Instruction[] spvLocals)
+        {
+            _localForArgs.Add(funcIndex, spvLocals);
+        }
+
+        public void DeclareArgument(int argIndex, Instruction spvLocal)
+        {
+            _funcArgs.Add(argIndex, spvLocal);
+        }
+
+        public void DeclareFunction(int funcIndex, StructuredFunction function, Instruction spvFunc)
+        {
+            _functions.Add(funcIndex, (function, spvFunc));
+        }
+
+        public Instruction GetFP32(IAstNode node)
+        {
+            return Get(AggregateType.FP32, node);
+        }
+
+        public Instruction GetFP64(IAstNode node)
+        {
+            return Get(AggregateType.FP64, node);
+        }
+
+        public Instruction GetS32(IAstNode node)
+        {
+            return Get(AggregateType.S32, node);
+        }
+
+        public Instruction GetU32(IAstNode node)
+        {
+            return Get(AggregateType.U32, node);
+        }
+
+        public Instruction Get(AggregateType type, IAstNode node)
+        {
+            if (node is AstOperation operation)
+            {
+                var opResult = Instructions.Generate(this, operation);
+                return BitcastIfNeeded(type, opResult.Type, opResult.Value);
+            }
+            else if (node is AstOperand operand)
+            {
+                return operand.Type switch
+                {
+                    IrOperandType.Argument => GetArgument(type, operand),
+                    IrOperandType.Constant => GetConstant(type, operand),
+                    IrOperandType.ConstantBuffer => GetConstantBuffer(type, operand),
+                    IrOperandType.LocalVariable => GetLocal(type, operand),
+                    IrOperandType.Undefined => GetUndefined(type),
+                    _ => throw new ArgumentException($"Invalid operand type \"{operand.Type}\".")
+                };
+            }
+
+            throw new NotImplementedException(node.GetType().Name);
+        }
+
+        public Instruction GetWithType(IAstNode node, out AggregateType type)
+        {
+            if (node is AstOperation operation)
+            {
+                var opResult = Instructions.Generate(this, operation);
+                type = opResult.Type;
+                return opResult.Value;
+            }
+            else if (node is AstOperand operand)
+            {
+                switch (operand.Type)
+                {
+                    case IrOperandType.LocalVariable:
+                        type = operand.VarType;
+                        return GetLocal(type, operand);
+                    default:
+                        throw new ArgumentException($"Invalid operand type \"{operand.Type}\".");
+                }
+            }
+
+            throw new NotImplementedException(node.GetType().Name);
+        }
+
+        private Instruction GetUndefined(AggregateType type)
+        {
+            return type switch
+            {
+                AggregateType.Bool => ConstantFalse(TypeBool()),
+                AggregateType.FP32 => Constant(TypeFP32(), 0f),
+                AggregateType.FP64 => Constant(TypeFP64(), 0d),
+                _ => Constant(GetType(type), 0)
+            };
+        }
+
+        public Instruction GetConstant(AggregateType type, AstOperand operand)
+        {
+            return type switch
+            {
+                AggregateType.Bool => operand.Value != 0 ? ConstantTrue(TypeBool()) : ConstantFalse(TypeBool()),
+                AggregateType.FP32 => Constant(TypeFP32(), BitConverter.Int32BitsToSingle(operand.Value)),
+                AggregateType.FP64 => Constant(TypeFP64(), (double)BitConverter.Int32BitsToSingle(operand.Value)),
+                AggregateType.S32 => Constant(TypeS32(), operand.Value),
+                AggregateType.U32 => Constant(TypeU32(), (uint)operand.Value),
+                _ => throw new ArgumentException($"Invalid type \"{type}\".")
+            };
+        }
+
+        public Instruction GetConstantBuffer(AggregateType type, AstOperand operand)
+        {
+            var i1 = Constant(TypeS32(), 0);
+            var i2 = Constant(TypeS32(), operand.CbufOffset >> 2);
+            var i3 = Constant(TypeU32(), operand.CbufOffset & 3);
+
+            Instruction elemPointer;
+
+            if (UniformBuffersArray != null)
+            {
+                var ubVariable = UniformBuffersArray;
+                var i0 = Constant(TypeS32(), operand.CbufSlot);
+
+                elemPointer = AccessChain(TypePointer(StorageClass.Uniform, TypeFP32()), ubVariable, i0, i1, i2, i3);
+            }
+            else
+            {
+                var ubVariable = UniformBuffers[operand.CbufSlot];
+
+                elemPointer = AccessChain(TypePointer(StorageClass.Uniform, TypeFP32()), ubVariable, i1, i2, i3);
+            }
+
+            return BitcastIfNeeded(type, AggregateType.FP32, Load(TypeFP32(), elemPointer));
+        }
+
+        public Instruction GetLocalPointer(AstOperand local)
+        {
+            return _locals[local];
+        }
+
+        public Instruction[] GetLocalForArgsPointers(int funcIndex)
+        {
+            return _localForArgs[funcIndex];
+        }
+
+        public Instruction GetArgumentPointer(AstOperand funcArg)
+        {
+            return _funcArgs[funcArg.Value];
+        }
+
+        public Instruction GetLocal(AggregateType dstType, AstOperand local)
+        {
+            var srcType = local.VarType;
+            return BitcastIfNeeded(dstType, srcType, Load(GetType(srcType), GetLocalPointer(local)));
+        }
+
+        public Instruction GetArgument(AggregateType dstType, AstOperand funcArg)
+        {
+            var srcType = funcArg.VarType;
+            return BitcastIfNeeded(dstType, srcType, Load(GetType(srcType), GetArgumentPointer(funcArg)));
+        }
+
+        public (StructuredFunction, Instruction) GetFunction(int funcIndex)
+        {
+            return _functions[funcIndex];
+        }
+
+        public Instruction GetType(AggregateType type, int length = 1)
+        {
+            if ((type & AggregateType.Array) != 0)
+            {
+                return TypeArray(GetType(type & ~AggregateType.Array), Constant(TypeU32(), length));
+            }
+            else if ((type & AggregateType.ElementCountMask) != 0)
+            {
+                int vectorLength = (type & AggregateType.ElementCountMask) switch
+                {
+                    AggregateType.Vector2 => 2,
+                    AggregateType.Vector3 => 3,
+                    AggregateType.Vector4 => 4,
+                    _ => 1
+                };
+
+                return TypeVector(GetType(type & ~AggregateType.ElementCountMask), vectorLength);
+            }
+
+            return type switch
+            {
+                AggregateType.Void => TypeVoid(),
+                AggregateType.Bool => TypeBool(),
+                AggregateType.FP32 => TypeFP32(),
+                AggregateType.FP64 => TypeFP64(),
+                AggregateType.S32 => TypeS32(),
+                AggregateType.U32 => TypeU32(),
+                _ => throw new ArgumentException($"Invalid attribute type \"{type}\".")
+            };
+        }
+
+        public Instruction BitcastIfNeeded(AggregateType dstType, AggregateType srcType, Instruction value)
+        {
+            if (dstType == srcType)
+            {
+                return value;
+            }
+
+            if (dstType == AggregateType.Bool)
+            {
+                return INotEqual(TypeBool(), BitcastIfNeeded(AggregateType.S32, srcType, value), Constant(TypeS32(), 0));
+            }
+            else if (srcType == AggregateType.Bool)
+            {
+                var intTrue  = Constant(TypeS32(), IrConsts.True);
+                var intFalse = Constant(TypeS32(), IrConsts.False);
+
+                return BitcastIfNeeded(dstType, AggregateType.S32, Select(TypeS32(), value, intTrue, intFalse));
+            }
+            else
+            {
+                return Bitcast(GetType(dstType, 1), value);
+            }
+        }
+
+        public Instruction TypeS32()
+        {
+            return TypeInt(32, true);
+        }
+
+        public Instruction TypeU32()
+        {
+            return TypeInt(32, false);
+        }
+
+        public Instruction TypeFP32()
+        {
+            return TypeFloat(32);
+        }
+
+        public Instruction TypeFP64()
+        {
+            return TypeFloat(64);
+        }
+    }
+}