From 6b23a2c125b9c48b5ebea92716004ef68698bb0f Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Wed, 17 Apr 2019 20:57:08 -0300
Subject: 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
---
 .../Shader/CodeGen/Glsl/CodeGenContext.cs          | 90 ++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 Ryujinx.Graphics/Shader/CodeGen/Glsl/CodeGenContext.cs

(limited to 'Ryujinx.Graphics/Shader/CodeGen/Glsl/CodeGenContext.cs')

diff --git a/Ryujinx.Graphics/Shader/CodeGen/Glsl/CodeGenContext.cs b/Ryujinx.Graphics/Shader/CodeGen/Glsl/CodeGenContext.cs
new file mode 100644
index 00000000..ce5d7b94
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/CodeGen/Glsl/CodeGenContext.cs
@@ -0,0 +1,90 @@
+using System.Collections.Generic;
+using System.Text;
+
+namespace Ryujinx.Graphics.Shader.CodeGen.Glsl
+{
+    class CodeGenContext
+    {
+        private const string Tab = "    ";
+
+        public ShaderConfig Config { get; }
+
+        public List<CBufferDescriptor> CBufferDescriptors { get; }
+        public List<TextureDescriptor> TextureDescriptors { get; }
+
+        public OperandManager OperandManager { get; }
+
+        private StringBuilder _sb;
+
+        private int _level;
+
+        private string _identation;
+
+        public CodeGenContext(ShaderConfig config)
+        {
+            Config = config;
+
+            CBufferDescriptors = new List<CBufferDescriptor>();
+            TextureDescriptors = new List<TextureDescriptor>();
+
+            OperandManager = new OperandManager();
+
+            _sb = new StringBuilder();
+        }
+
+        public void AppendLine()
+        {
+            _sb.AppendLine();
+        }
+
+        public void AppendLine(string str)
+        {
+            _sb.AppendLine(_identation + str);
+        }
+
+        public string GetCode()
+        {
+            return _sb.ToString();
+        }
+
+        public void EnterScope()
+        {
+            AppendLine("{");
+
+            _level++;
+
+            UpdateIdentation();
+        }
+
+        public void LeaveScope(string suffix = "")
+        {
+            if (_level == 0)
+            {
+                return;
+            }
+
+            _level--;
+
+            UpdateIdentation();
+
+            AppendLine("}" + suffix);
+        }
+
+        private void UpdateIdentation()
+        {
+            _identation = GetIdentation(_level);
+        }
+
+        private static string GetIdentation(int level)
+        {
+            string identation = string.Empty;
+
+            for (int index = 0; index < level; index++)
+            {
+                identation += Tab;
+            }
+
+            return identation;
+        }
+    }
+}
\ No newline at end of file
-- 
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