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, 105 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/Shader/Translation/EmitterContext.cs b/Ryujinx.Graphics/Shader/Translation/EmitterContext.cs
new file mode 100644
index 00000000..6c2bf6e4
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/Translation/EmitterContext.cs
@@ -0,0 +1,105 @@
+using Ryujinx.Graphics.Gal;
+using Ryujinx.Graphics.Shader.Decoders;
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    class EmitterContext
+    {
+        public Block  CurrBlock { get; set; }
+        public OpCode CurrOp    { get; set; }
+
+        private GalShaderType _shaderType;
+
+        private ShaderHeader _header;
+
+        private List<Operation> _operations;
+
+        private Dictionary<ulong, Operand> _labels;
+
+        public EmitterContext(GalShaderType shaderType, ShaderHeader header)
+        {
+            _shaderType = shaderType;
+            _header     = header;
+
+            _operations = new List<Operation>();
+
+            _labels = new Dictionary<ulong, Operand>();
+        }
+
+        public Operand Add(Instruction inst, Operand dest = null, params Operand[] sources)
+        {
+            Operation operation = new Operation(inst, dest, sources);
+
+            Add(operation);
+
+            return dest;
+        }
+
+        public void Add(Operation operation)
+        {
+            _operations.Add(operation);
+        }
+
+        public void MarkLabel(Operand label)
+        {
+            Add(Instruction.MarkLabel, label);
+        }
+
+        public Operand GetLabel(ulong address)
+        {
+            if (!_labels.TryGetValue(address, out Operand label))
+            {
+                label = Label();
+
+                _labels.Add(address, label);
+            }
+
+            return label;
+        }
+
+        public void PrepareForReturn()
+        {
+            if (_shaderType == GalShaderType.Fragment)
+            {
+                if (_header.OmapDepth)
+                {
+                    Operand dest = Attribute(AttributeConsts.FragmentOutputDepth);
+
+                    Operand src = Register(_header.DepthRegister, RegisterType.Gpr);
+
+                    this.Copy(dest, src);
+                }
+
+                int regIndex = 0;
+
+                for (int attachment = 0; attachment < 8; attachment++)
+                {
+                    OutputMapTarget target = _header.OmapTargets[attachment];
+
+                    for (int component = 0; component < 4; component++)
+                    {
+                        if (target.ComponentEnabled(component))
+                        {
+                            Operand dest = Attribute(AttributeConsts.FragmentOutputColorBase + regIndex * 4);
+
+                            Operand src = Register(regIndex, RegisterType.Gpr);
+
+                            this.Copy(dest, src);
+
+                            regIndex++;
+                        }
+                    }
+                }
+            }
+        }
+
+        public Operation[] GetOperations()
+        {
+            return _operations.ToArray();
+        }
+    }
+}
\ No newline at end of file