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, 107 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/Shader/Instructions/InstEmitFlow.cs b/Ryujinx.Graphics/Shader/Instructions/InstEmitFlow.cs
new file mode 100644
index 00000000..c4523f75
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/Instructions/InstEmitFlow.cs
@@ -0,0 +1,107 @@
+using Ryujinx.Graphics.Shader.Decoders;
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using Ryujinx.Graphics.Shader.Translation;
+using System.Collections.Generic;
+using System.Linq;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Instructions
+{
+    static partial class InstEmit
+    {
+        public static void Bra(EmitterContext context)
+        {
+            EmitBranch(context, context.CurrBlock.Branch.Address);
+        }
+
+        public static void Exit(EmitterContext context)
+        {
+            OpCodeExit op = (OpCodeExit)context.CurrOp;
+
+            //TODO: Figure out how this is supposed to work in the
+            //presence of other condition codes.
+            if (op.Condition == Condition.Always)
+            {
+                context.Return();
+            }
+        }
+
+        public static void Kil(EmitterContext context)
+        {
+            context.Discard();
+        }
+
+        public static void Ssy(EmitterContext context)
+        {
+            OpCodeSsy op = (OpCodeSsy)context.CurrOp;
+
+            foreach (KeyValuePair<OpCodeSync, Operand> kv in op.Syncs)
+            {
+                OpCodeSync opSync = kv.Key;
+
+                Operand local = kv.Value;
+
+                int ssyIndex = opSync.Targets[op];
+
+                context.Copy(local, Const(ssyIndex));
+            }
+        }
+
+        public static void Sync(EmitterContext context)
+        {
+            OpCodeSync op = (OpCodeSync)context.CurrOp;
+
+            if (op.Targets.Count == 1)
+            {
+                //If we have only one target, then the SSY is basically
+                //a branch, we can produce better codegen for this case.
+                OpCodeSsy opSsy = op.Targets.Keys.First();
+
+                EmitBranch(context, opSsy.GetAbsoluteAddress());
+            }
+            else
+            {
+                foreach (KeyValuePair<OpCodeSsy, int> kv in op.Targets)
+                {
+                    OpCodeSsy opSsy = kv.Key;
+
+                    Operand label = context.GetLabel(opSsy.GetAbsoluteAddress());
+
+                    Operand local = opSsy.Syncs[op];
+
+                    int ssyIndex = kv.Value;
+
+                    context.BranchIfTrue(label, context.ICompareEqual(local, Const(ssyIndex)));
+                }
+            }
+        }
+
+        private static void EmitBranch(EmitterContext context, ulong address)
+        {
+            //If we're branching to the next instruction, then the branch
+            //is useless and we can ignore it.
+            if (address == context.CurrOp.Address + 8)
+            {
+                return;
+            }
+
+            Operand label = context.GetLabel(address);
+
+            Operand pred = Register(context.CurrOp.Predicate);
+
+            if (context.CurrOp.Predicate.IsPT)
+            {
+                context.Branch(label);
+            }
+            else if (context.CurrOp.InvertPredicate)
+            {
+                context.BranchIfFalse(label, pred);
+            }
+            else
+            {
+                context.BranchIfTrue(label, pred);
+            }
+        }
+    }
+}
\ No newline at end of file