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, 61 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/Shader/Decoders/OpCodeTextureScalar.cs b/Ryujinx.Graphics/Shader/Decoders/OpCodeTextureScalar.cs
new file mode 100644
index 00000000..4389f453
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/Decoders/OpCodeTextureScalar.cs
@@ -0,0 +1,61 @@
+using Ryujinx.Graphics.Shader.Instructions;
+
+namespace Ryujinx.Graphics.Shader.Decoders
+{
+    class OpCodeTextureScalar : OpCode
+    {
+#region "Component mask LUT"
+        private const int ____ = 0x0;
+        private const int R___ = 0x1;
+        private const int _G__ = 0x2;
+        private const int RG__ = 0x3;
+        private const int __B_ = 0x4;
+        private const int RGB_ = 0x7;
+        private const int ___A = 0x8;
+        private const int R__A = 0x9;
+        private const int _G_A = 0xa;
+        private const int RG_A = 0xb;
+        private const int __BA = 0xc;
+        private const int R_BA = 0xd;
+        private const int _GBA = 0xe;
+        private const int RGBA = 0xf;
+
+        private static int[,] _maskLut = new int[,]
+        {
+            { R___, _G__, __B_, ___A, RG__, R__A, _G_A, __BA },
+            { RGB_, RG_A, R_BA, _GBA, RGBA, ____, ____, ____ }
+        };
+#endregion
+
+        public Register Rd0 { get; }
+        public Register Ra  { get; }
+        public Register Rb  { get; }
+        public Register Rd1 { get; }
+
+        public int Immediate { get; }
+
+        public int ComponentMask { get; }
+
+        protected int RawType;
+
+        public bool IsFp16 { get; }
+
+        public OpCodeTextureScalar(InstEmitter emitter, ulong address, long opCode) : base(emitter, address, opCode)
+        {
+            Rd0 = new Register(opCode.Extract(0,  8), RegisterType.Gpr);
+            Ra  = new Register(opCode.Extract(8,  8), RegisterType.Gpr);
+            Rb  = new Register(opCode.Extract(20, 8), RegisterType.Gpr);
+            Rd1 = new Register(opCode.Extract(28, 8), RegisterType.Gpr);
+
+            Immediate = opCode.Extract(36, 13);
+
+            int compSel = opCode.Extract(50, 3);
+
+            RawType = opCode.Extract(53, 4);
+
+            IsFp16 = !opCode.Extract(59);
+
+            ComponentMask = _maskLut[Rd1.IsRZ ? 0 : 1, compSel];
+        }
+    }
+}
\ No newline at end of file