Initial work

Ryujinx.Graphics.Gpu/Engine/ShaderDumper.cs

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+using System.IO;
+
+namespace Ryujinx.Graphics.Gpu.Engine
+{
+    class ShaderDumper
+    {
+        private const int ShaderHeaderSize = 0x50;
+
+        private GpuContext _context;
+
+        private string _runtimeDir;
+        private string _dumpPath;
+        private int    _dumpIndex;
+
+        public int CurrentDumpIndex => _dumpIndex;
+
+        public ShaderDumper(GpuContext context)
+        {
+            _context = context;
+
+            _dumpIndex = 1;
+        }
+
+        public void Dump(ulong gpuVa, bool compute)
+        {
+            _dumpPath = GraphicsConfig.ShadersDumpPath;
+
+            if (string.IsNullOrWhiteSpace(_dumpPath))
+            {
+                return;
+            }
+
+            string fileName = "Shader" + _dumpIndex.ToString("d4") + ".bin";
+
+            string fullPath = Path.Combine(FullDir(), fileName);
+            string codePath = Path.Combine(CodeDir(), fileName);
+
+            _dumpIndex++;
+
+            ulong headerSize = compute ? 0UL : ShaderHeaderSize;
+
+            using (FileStream fullFile = File.Create(fullPath))
+            using (FileStream codeFile = File.Create(codePath))
+            {
+                BinaryWriter fullWriter = new BinaryWriter(fullFile);
+                BinaryWriter codeWriter = new BinaryWriter(codeFile);
+
+                for (ulong i = 0; i < headerSize; i += 4)
+                {
+                    fullWriter.Write(_context.MemoryAccessor.ReadInt32(gpuVa + i));
+                }
+
+                ulong offset = 0;
+
+                ulong instruction = 0;
+
+                // Dump until a NOP instruction is found.
+                while ((instruction >> 48 & 0xfff8) != 0x50b0)
+                {
+                    uint word0 = (uint)_context.MemoryAccessor.ReadInt32(gpuVa + headerSize + offset + 0);
+                    uint word1 = (uint)_context.MemoryAccessor.ReadInt32(gpuVa + headerSize + offset + 4);
+
+                    instruction = word0 | (ulong)word1 << 32;
+
+                    // Zero instructions (other kind of NOP) stop immediately,
+                    // this is to avoid two rows of zeroes.
+                    if (instruction == 0)
+                    {
+                        break;
+                    }
+
+                    fullWriter.Write(instruction);
+                    codeWriter.Write(instruction);
+
+                    offset += 8;
+                }
+
+                // Align to meet nvdisasm requirements.
+                while (offset % 0x20 != 0)
+                {
+                    fullWriter.Write(0);
+                    codeWriter.Write(0);
+
+                    offset += 4;
+                }
+            }
+        }
+
+        private string FullDir()
+        {
+            return CreateAndReturn(Path.Combine(DumpDir(), "Full"));
+        }
+
+        private string CodeDir()
+        {
+            return CreateAndReturn(Path.Combine(DumpDir(), "Code"));
+        }
+
+        private string DumpDir()
+        {
+            if (string.IsNullOrEmpty(_runtimeDir))
+            {
+                int index = 1;
+
+                do
+                {
+                    _runtimeDir = Path.Combine(_dumpPath, "Dumps" + index.ToString("d2"));
+
+                    index++;
+                }
+                while (Directory.Exists(_runtimeDir));
+
+                Directory.CreateDirectory(_runtimeDir);
+            }
+
+            return _runtimeDir;
+        }
+
+        private static string CreateAndReturn(string dir)
+        {
+            Directory.CreateDirectory(dir);
+
+            return dir;
+        }
+    }
+}