1 files changed, 89 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Gpu/Engine/MME/MacroHLETable.cs b/Ryujinx.Graphics.Gpu/Engine/MME/MacroHLETable.cs
new file mode 100644
index 00000000..77d041ad
--- /dev/null
+++ b/Ryujinx.Graphics.Gpu/Engine/MME/MacroHLETable.cs
@@ -0,0 +1,89 @@
+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>
+        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.MultiDrawElementsIndirectCount, new Hash128(0x890AF57ED3FB1C37, 0x35D0C95C61F5386F), 0x19C)
+        };
+
+        private static bool IsMacroHLESupported(Capabilities caps, MacroHLEFunctionName name)
+        {
+            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)
+                {
+                    name = entry.Name;
+                    return IsMacroHLESupported(caps, name);
+                }
+            }
+
+            name = MacroHLEFunctionName.None;
+            return false;
+        }
+    }
+}