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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;
}
}
}
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