New shader translator implementation (#654)

* Start implementing a new shader translator

* Fix shift instructions and a typo

* Small refactoring on StructuredProgram, move RemovePhis method to a separate class

* Initial geometry shader support

* Implement TLD4

* Fix -- There's no negation on FMUL32I

* Add constant folding and algebraic simplification optimizations, nits

* Some leftovers from constant folding

* Avoid cast for constant assignments

* Add a branch elimination pass, and misc small fixes

* Remove redundant branches, add expression propagation and other improvements on the code

* Small leftovers -- add missing break and continue, remove unused properties, other improvements

* Add null check to handle empty block cases on block visitor

* Add HADD2 and HMUL2 half float shader instructions

* Optimize pack/unpack sequences, some fixes related to half float instructions

* Add TXQ, TLD, TLDS and TLD4S shader texture instructions, and some support for bindless textures, some refactoring on codegen

* Fix copy paste mistake that caused RZ to be ignored on the AST instruction

* Add workaround for conditional exit, and fix half float instruction with constant buffer

* Add missing 0.0 source for TLDS.LZ variants

* Simplify the switch for TLDS.LZ

* Texture instructions related fixes

* Implement the HFMA instruction, and some misc. fixes

* Enable constant folding on UnpackHalf2x16 instructions

* Refactor HFMA to use OpCode* for opcode decoding rather than on the helper methods

* Remove the old shader translator

* Remove ShaderDeclInfo and other unused things

* Add dual vertex shader support

* Add ShaderConfig, used to pass shader type and maximum cbuffer size

* Move and rename some instruction enums

* Move texture instructions into a separate file

* Move operand GetExpression and locals management to OperandManager

* Optimize opcode decoding using a simple list and binary search

* Add missing condition for do-while on goto elimination

* Misc. fixes on texture instructions

* Simplify TLDS switch

* Address PR feedback, and a nit

1 files changed, 142 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/Shader/StructuredIr/InstructionInfo.cs b/Ryujinx.Graphics/Shader/StructuredIr/InstructionInfo.cs
new file mode 100644
index 00000000..46a61553
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/StructuredIr/InstructionInfo.cs
@@ -0,0 +1,142 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System;
+
+namespace Ryujinx.Graphics.Shader.StructuredIr
+{
+    static class InstructionInfo
+    {
+        private struct InstInfo
+        {
+            public VariableType DestType { get; }
+
+            public VariableType[] SrcTypes { get; }
+
+            public InstInfo(VariableType destType, params VariableType[] srcTypes)
+            {
+                DestType = destType;
+                SrcTypes = srcTypes;
+            }
+        }
+
+        private static InstInfo[] _infoTbl;
+
+        static InstructionInfo()
+        {
+            _infoTbl = new InstInfo[(int)Instruction.Count];
+
+            Add(Instruction.Absolute,                 VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.Add,                      VariableType.Scalar, VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.BitfieldExtractS32,       VariableType.S32,    VariableType.S32,    VariableType.S32,    VariableType.S32);
+            Add(Instruction.BitfieldExtractU32,       VariableType.U32,    VariableType.U32,    VariableType.S32,    VariableType.S32);
+            Add(Instruction.BitfieldInsert,           VariableType.Int,    VariableType.Int,    VariableType.Int,    VariableType.S32,    VariableType.S32);
+            Add(Instruction.BitfieldReverse,          VariableType.Int,    VariableType.Int);
+            Add(Instruction.BitwiseAnd,               VariableType.Int,    VariableType.Int,    VariableType.Int);
+            Add(Instruction.BitwiseExclusiveOr,       VariableType.Int,    VariableType.Int,    VariableType.Int);
+            Add(Instruction.BitwiseNot,               VariableType.Int,    VariableType.Int);
+            Add(Instruction.BitwiseOr,                VariableType.Int,    VariableType.Int,    VariableType.Int);
+            Add(Instruction.BranchIfTrue,             VariableType.None,   VariableType.Bool);
+            Add(Instruction.BranchIfFalse,            VariableType.None,   VariableType.Bool);
+            Add(Instruction.Ceiling,                  VariableType.F32,    VariableType.F32,    VariableType.F32);
+            Add(Instruction.Clamp,                    VariableType.Scalar, VariableType.Scalar, VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.ClampU32,                 VariableType.U32,    VariableType.U32,    VariableType.U32,    VariableType.U32);
+            Add(Instruction.CompareEqual,             VariableType.Bool,   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.CompareGreater,           VariableType.Bool,   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.CompareGreaterOrEqual,    VariableType.Bool,   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.CompareGreaterOrEqualU32, VariableType.Bool,   VariableType.U32,    VariableType.U32);
+            Add(Instruction.CompareGreaterU32,        VariableType.Bool,   VariableType.U32,    VariableType.U32);
+            Add(Instruction.CompareLess,              VariableType.Bool,   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.CompareLessOrEqual,       VariableType.Bool,   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.CompareLessOrEqualU32,    VariableType.Bool,   VariableType.U32,    VariableType.U32);
+            Add(Instruction.CompareLessU32,           VariableType.Bool,   VariableType.U32,    VariableType.U32);
+            Add(Instruction.CompareNotEqual,          VariableType.Bool,   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.ConditionalSelect,        VariableType.Scalar, VariableType.Bool,   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.ConvertFPToS32,           VariableType.S32,    VariableType.F32);
+            Add(Instruction.ConvertS32ToFP,           VariableType.F32,    VariableType.S32);
+            Add(Instruction.ConvertU32ToFP,           VariableType.F32,    VariableType.U32);
+            Add(Instruction.Cosine,                   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.Divide,                   VariableType.Scalar, VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.ExponentB2,               VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.Floor,                    VariableType.F32,    VariableType.F32);
+            Add(Instruction.FusedMultiplyAdd,         VariableType.F32,    VariableType.F32,    VariableType.F32,    VariableType.F32);
+            Add(Instruction.IsNan,                    VariableType.Bool,   VariableType.F32);
+            Add(Instruction.LoadConstant,             VariableType.F32,    VariableType.S32,    VariableType.S32);
+            Add(Instruction.LogarithmB2,              VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.LogicalAnd,               VariableType.Bool,   VariableType.Bool,   VariableType.Bool);
+            Add(Instruction.LogicalExclusiveOr,       VariableType.Bool,   VariableType.Bool,   VariableType.Bool);
+            Add(Instruction.LogicalNot,               VariableType.Bool,   VariableType.Bool);
+            Add(Instruction.LogicalOr,                VariableType.Bool,   VariableType.Bool,   VariableType.Bool);
+            Add(Instruction.ShiftLeft,                VariableType.Int,    VariableType.Int,    VariableType.Int);
+            Add(Instruction.ShiftRightS32,            VariableType.S32,    VariableType.S32,    VariableType.Int);
+            Add(Instruction.ShiftRightU32,            VariableType.U32,    VariableType.U32,    VariableType.Int);
+            Add(Instruction.Maximum,                  VariableType.Scalar, VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.MaximumU32,               VariableType.U32,    VariableType.U32,    VariableType.U32);
+            Add(Instruction.Minimum,                  VariableType.Scalar, VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.MinimumU32,               VariableType.U32,    VariableType.U32,    VariableType.U32);
+            Add(Instruction.Multiply,                 VariableType.Scalar, VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.Negate,                   VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.PackHalf2x16,             VariableType.U32,    VariableType.F32,    VariableType.F32);
+            Add(Instruction.ReciprocalSquareRoot,     VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.Sine,                     VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.SquareRoot,               VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.Subtract,                 VariableType.Scalar, VariableType.Scalar, VariableType.Scalar);
+            Add(Instruction.TextureSample,            VariableType.F32);
+            Add(Instruction.TextureSize,              VariableType.S32,    VariableType.S32,    VariableType.S32);
+            Add(Instruction.Truncate,                 VariableType.F32,    VariableType.F32);
+            Add(Instruction.UnpackHalf2x16,           VariableType.F32,    VariableType.U32);
+        }
+
+        private static void Add(Instruction inst, VariableType destType, params VariableType[] srcTypes)
+        {
+            _infoTbl[(int)inst] = new InstInfo(destType, srcTypes);
+        }
+
+        public static VariableType GetDestVarType(Instruction inst)
+        {
+            return GetFinalVarType(_infoTbl[(int)(inst & Instruction.Mask)].DestType, inst);
+        }
+
+        public static VariableType GetSrcVarType(Instruction inst, int index)
+        {
+            if (inst == Instruction.TextureSample)
+            {
+                return VariableType.F32;
+            }
+
+            return GetFinalVarType(_infoTbl[(int)(inst & Instruction.Mask)].SrcTypes[index], inst);
+        }
+
+        private static VariableType GetFinalVarType(VariableType type, Instruction inst)
+        {
+            if (type == VariableType.Scalar)
+            {
+                return (inst & Instruction.FP) != 0
+                    ? VariableType.F32
+                    : VariableType.S32;
+            }
+            else if (type == VariableType.Int)
+            {
+                return VariableType.S32;
+            }
+            else if (type == VariableType.None)
+            {
+                throw new ArgumentException($"Invalid operand for instruction \"{inst}\".");
+            }
+
+            return type;
+        }
+
+        public static bool IsUnary(Instruction inst)
+        {
+            if (inst == Instruction.Copy)
+            {
+                return true;
+            }
+            else if (inst == Instruction.TextureSample)
+            {
+                return false;
+            }
+
+            return _infoTbl[(int)(inst & Instruction.Mask)].SrcTypes.Length == 1;
+        }
+    }
+}
\ No newline at end of file