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, 88 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/Shader/Instructions/InstEmitAluHelper.cs b/Ryujinx.Graphics/Shader/Instructions/InstEmitAluHelper.cs
new file mode 100644
index 00000000..b5bde1a1
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/Instructions/InstEmitAluHelper.cs
@@ -0,0 +1,88 @@
+using Ryujinx.Graphics.Shader.Decoders;
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using Ryujinx.Graphics.Shader.Translation;
+using System;
+
+using static Ryujinx.Graphics.Shader.Instructions.InstEmitHelper;
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Instructions
+{
+    static class InstEmitAluHelper
+    {
+        public static int GetIntMin(IntegerType type)
+        {
+            switch (type)
+            {
+                case IntegerType.U8:  return byte.MinValue;
+                case IntegerType.S8:  return sbyte.MinValue;
+                case IntegerType.U16: return ushort.MinValue;
+                case IntegerType.S16: return short.MinValue;
+                case IntegerType.U32: return (int)uint.MinValue;
+                case IntegerType.S32: return int.MinValue;
+            }
+
+            throw new ArgumentException($"The type \"{type}\" is not a supported int type.");
+        }
+
+        public static int GetIntMax(IntegerType type)
+        {
+            switch (type)
+            {
+                case IntegerType.U8:  return byte.MaxValue;
+                case IntegerType.S8:  return sbyte.MaxValue;
+                case IntegerType.U16: return ushort.MaxValue;
+                case IntegerType.S16: return short.MaxValue;
+                case IntegerType.U32: return unchecked((int)uint.MaxValue);
+                case IntegerType.S32: return int.MaxValue;
+            }
+
+            throw new ArgumentException($"The type \"{type}\" is not a supported int type.");
+        }
+
+        public static Operand GetPredLogicalOp(
+            EmitterContext   context,
+            LogicalOperation logicalOp,
+            Operand          input,
+            Operand          pred)
+        {
+            switch (logicalOp)
+            {
+                case LogicalOperation.And:         return context.BitwiseAnd        (input, pred);
+                case LogicalOperation.Or:          return context.BitwiseOr         (input, pred);
+                case LogicalOperation.ExclusiveOr: return context.BitwiseExclusiveOr(input, pred);
+            }
+
+            return input;
+        }
+
+        public static void SetZnFlags(EmitterContext context, Operand dest, bool setCC, bool extended = false)
+        {
+            if (!setCC)
+            {
+                return;
+            }
+
+            if (extended)
+            {
+                //When the operation is extended, it means we are doing
+                //the operation on a long word with any number of bits,
+                //so we need to AND the zero flag from result with the
+                //previous result when extended is specified, to ensure
+                //we have ZF set only if all words are zero, and not just
+                //the last one.
+                Operand oldZF = GetZF(context);
+
+                Operand res = context.BitwiseAnd(context.ICompareEqual(dest, Const(0)), oldZF);
+
+                context.Copy(GetZF(context), res);
+            }
+            else
+            {
+                context.Copy(GetZF(context), context.ICompareEqual(dest, Const(0)));
+            }
+
+            context.Copy(GetNF(context), context.ICompareLess(dest, Const(0)));
+        }
+    }
+}
\ No newline at end of file