91 lines
3.3 KiB
C#
91 lines
3.3 KiB
C#
// -----------------------------------------------------------------------------
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// file="Matrix.Create"
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// Project: StgSharp
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// Copyright (c) Nitload.
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// SPDX-License-Identifier: MIT
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// -----------------------------------------------------------------------------
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using StgSharp.HighPerformance.Memory;
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using StgSharp.Mathematics;
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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.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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using Tlsf = global::StgSharp.HighPerformance.Memory.TwoLayerSegregatedFitAllocator;
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namespace StgSharp.Mathematics.Numeric
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{
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public unsafe partial class Matrix<T>
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{
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private const int KernelSideLength = 4;
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public static Matrix<T> Create(
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int columnLength,
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int rowLength,
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MatrixLayout layout,
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TwoLayerSegregatedFitAllocator allocator
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)
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{
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ArgumentNullException.ThrowIfNull(allocator);
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ArgumentOutOfRangeException.ThrowIfNegativeOrZero(columnLength);
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ArgumentOutOfRangeException.ThrowIfNegativeOrZero(rowLength);
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int kernelColumns = DivideRoundUp(columnLength, KernelSideLength);
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int kernelRows = DivideRoundUp(rowLength, KernelSideLength);
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if (layout is MatrixLayout.UpperTriangle or MatrixLayout.LowerTriangle)
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{
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if (kernelColumns != kernelRows) {
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throw new ArgumentException("Triangular layouts require square matrices.");
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}
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}
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long kernelCount = layout switch
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{
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MatrixLayout.DenseRectangle => (long)kernelColumns * kernelRows,
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MatrixLayout.UpperTriangle => TriangularKernelCount(kernelColumns),
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MatrixLayout.LowerTriangle => TriangularKernelCount(kernelRows),
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_ => throw new ArgumentOutOfRangeException(nameof(layout))
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};
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long requiredBytes = kernelCount * MatrixKernel<T>.Size;
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ArgumentOutOfRangeException.ThrowIfNegativeOrZero(requiredBytes, nameof(requiredBytes));
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Tlsf.Handle handle = allocator.Alloc((uint)requiredBytes);
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MatrixStorageHLSF<T> storage = new MatrixStorageHLSF<T>(allocator, handle);
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Matrix<T> matrix = new Matrix<T>(MatrixKernelBoarder.Create(layout), new MatrixSize(columnLength,
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rowLength,
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kernelColumns,
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kernelRows), storage);
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return matrix;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private static int DivideRoundUp(
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int value,
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int divisor
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)
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{
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return (value + (divisor - 1)) / divisor;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private static long TriangularKernelCount(
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int order
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)
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{
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long n = order;
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return (n * (n + 1L)) / 2L;
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}
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}
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}
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