106 lines
3.4 KiB
Plaintext
106 lines
3.4 KiB
Plaintext
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="HLSFAllocator.Level.cs"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the “Software”), to deal in the Software without restriction,
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// including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software,
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// and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and
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// this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED “AS IS”,
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// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH
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// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Numerics;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.HighPerformance.Memory
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{
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public unsafe partial class HybridLayerSegregatedFitAllocator
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{
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private const int MaxLevel = 9;
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private static readonly int[] levelSize = [
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64, 256, 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
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];
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public int AlignOfLevel(int bucketLevel)
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{
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int blockSize = levelSize[bucketLevel];
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return int.Min(blockSize, _align);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private int GetLevelFromSize(uint size)
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{
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// Ensure minimum size
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if (size <= 64)
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{
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return 0;
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}
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/*
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* Level sizes: [64, 256, 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216]
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* Pattern: 64 * 4^level for levels 0,1,2,3...
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* So: level = Log4(size/64) = (Log2(size/64))/2 = (Log2(size) - 6)/2
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* We can implement Log2 by counting right shifts needed to reach 0
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*/
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uint temp = size;
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int shifts = 0;
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// Count how many times we can divide by 2 (equivalent to log2)
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while (temp > 1)
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{
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temp >>= 1;
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shifts++;
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}
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// Convert log2 to level: level = (shifts - 6) / 2
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// But we need to handle the mapping properly for the specific level sizes
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int level = Math.Max(0, (shifts - 6) / 2);
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// Clamp to valid range
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return Math.Min(level, levelSize.Length - 1);
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}
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}
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public enum CommonMemoryAlign : int
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{
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XMMLevel = 16,
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YMMLevel = 32,
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ZMMLevel = 64,
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ArmNEONLevel = 16,
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}
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}
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