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, 45 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/Shader/CodeGen/Glsl/Instructions/InstGenPacking.cs b/Ryujinx.Graphics/Shader/CodeGen/Glsl/Instructions/InstGenPacking.cs
new file mode 100644
index 00000000..4a40032c
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/CodeGen/Glsl/Instructions/InstGenPacking.cs
@@ -0,0 +1,45 @@
+using Ryujinx.Graphics.Shader.StructuredIr;
+
+using static Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions.InstGenHelper;
+using static Ryujinx.Graphics.Shader.StructuredIr.InstructionInfo;
+
+namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions
+{
+    static class InstGenPacking
+    {
+        public static string PackHalf2x16(CodeGenContext context, AstOperation operation)
+        {
+            IAstNode src0 = operation.GetSource(0);
+            IAstNode src1 = operation.GetSource(1);
+
+            string src0Expr = GetSoureExpr(context, src0, GetSrcVarType(operation.Inst, 0));
+            string src1Expr = GetSoureExpr(context, src1, GetSrcVarType(operation.Inst, 1));
+
+            return $"packHalf2x16(vec2({src0Expr}, {src1Expr}))";
+        }
+
+        public static string UnpackHalf2x16(CodeGenContext context, AstOperation operation)
+        {
+            IAstNode src = operation.GetSource(0);
+
+            string srcExpr = GetSoureExpr(context, src, GetSrcVarType(operation.Inst, 0));
+
+            return $"unpackHalf2x16({srcExpr}){GetMask(operation.ComponentMask)}";
+        }
+
+        private static string GetMask(int compMask)
+        {
+            string mask = ".";
+
+            for (int index = 0; index < 2; index++)
+            {
+                if ((compMask & (1 << index)) != 0)
+                {
+                    mask += "xy".Substring(index, 1);
+                }
+            }
+
+            return mask;
+        }
+    }
+}
\ No newline at end of file