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