1 files changed, 113 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Gpu/Engine/MME/MacroHLETable.cs b/src/Ryujinx.Graphics.Gpu/Engine/MME/MacroHLETable.cs
new file mode 100644
index 00000000..719e170f
--- /dev/null
+++ b/src/Ryujinx.Graphics.Gpu/Engine/MME/MacroHLETable.cs
@@ -0,0 +1,113 @@
+using Ryujinx.Common;
+using Ryujinx.Graphics.GAL;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.Gpu.Engine.MME
+{
+    /// <summary>
+    /// Table with information about High-level implementations of GPU Macro code.
+    /// </summary>
+    static class MacroHLETable
+    {
+        /// <summary>
+        /// Macroo High-level implementation table entry.
+        /// </summary>
+        readonly struct TableEntry
+        {
+            /// <summary>
+            /// Name of the Macro function.
+            /// </summary>
+            public MacroHLEFunctionName Name { get; }
+
+            /// <summary>
+            /// Hash of the original binary Macro function code.
+            /// </summary>
+            public Hash128 Hash { get; }
+
+            /// <summary>
+            /// Size (in bytes) of the original binary Macro function code.
+            /// </summary>
+            public int Length { get; }
+
+            /// <summary>
+            /// Creates a new table entry.
+            /// </summary>
+            /// <param name="name">Name of the Macro function</param>
+            /// <param name="hash">Hash of the original binary Macro function code</param>
+            /// <param name="length">Size (in bytes) of the original binary Macro function code</param>
+            public TableEntry(MacroHLEFunctionName name, Hash128 hash, int length)
+            {
+                Name = name;
+                Hash = hash;
+                Length = length;
+            }
+        }
+
+        private static readonly TableEntry[] _table = new TableEntry[]
+        {
+            new TableEntry(MacroHLEFunctionName.ClearColor, new Hash128(0xA9FB28D1DC43645A, 0xB177E5D2EAE67FB0), 0x28),
+            new TableEntry(MacroHLEFunctionName.ClearDepthStencil, new Hash128(0x1B96CB77D4879F4F, 0x8557032FE0C965FB), 0x24),
+            new TableEntry(MacroHLEFunctionName.DrawArraysInstanced, new Hash128(0x197FB416269DBC26, 0x34288C01DDA82202), 0x48),
+            new TableEntry(MacroHLEFunctionName.DrawElementsInstanced, new Hash128(0x1A501FD3D54EC8E0, 0x6CF570CF79DA74D6), 0x5c),
+            new TableEntry(MacroHLEFunctionName.DrawElementsIndirect, new Hash128(0x86A3E8E903AF8F45, 0xD35BBA07C23860A4), 0x7c),
+            new TableEntry(MacroHLEFunctionName.MultiDrawElementsIndirectCount, new Hash128(0x890AF57ED3FB1C37, 0x35D0C95C61F5386F), 0x19C)
+        };
+
+        /// <summary>
+        /// Checks if the host supports all features required by the HLE macro.
+        /// </summary>
+        /// <param name="caps">Host capabilities</param>
+        /// <param name="name">Name of the HLE macro to be checked</param>
+        /// <returns>True if the host supports the HLE macro, false otherwise</returns>
+        private static bool IsMacroHLESupported(Capabilities caps, MacroHLEFunctionName name)
+        {
+            if (name == MacroHLEFunctionName.ClearColor ||
+                name == MacroHLEFunctionName.ClearDepthStencil ||
+                name == MacroHLEFunctionName.DrawArraysInstanced ||
+                name == MacroHLEFunctionName.DrawElementsInstanced ||
+                name == MacroHLEFunctionName.DrawElementsIndirect)
+            {
+                return true;
+            }
+            else if (name == MacroHLEFunctionName.MultiDrawElementsIndirectCount)
+            {
+                return caps.SupportsIndirectParameters;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Checks if there's a fast, High-level implementation of the specified Macro code available.
+        /// </summary>
+        /// <param name="code">Macro code to be checked</param>
+        /// <param name="caps">Renderer capabilities to check for this macro HLE support</param>
+        /// <param name="name">Name of the function if a implementation is available and supported, otherwise <see cref="MacroHLEFunctionName.None"/></param>
+        /// <returns>True if there is a implementation available and supported, false otherwise</returns>
+        public static bool TryGetMacroHLEFunction(ReadOnlySpan<int> code, Capabilities caps, out MacroHLEFunctionName name)
+        {
+            var mc = MemoryMarshal.Cast<int, byte>(code);
+
+            for (int i = 0; i < _table.Length; i++)
+            {
+                ref var entry = ref _table[i];
+
+                var hash = XXHash128.ComputeHash(mc.Slice(0, entry.Length));
+                if (hash == entry.Hash)
+                {
+                    if (IsMacroHLESupported(caps, entry.Name))
+                    {
+                        name = entry.Name;
+                        return true;
+                    }
+
+                    break;
+                }
+            }
+
+            name = MacroHLEFunctionName.None;
+            return false;
+        }
+    }
+}