37 lines
1.4 KiB
C#
37 lines
1.4 KiB
C#
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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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// <auto-generated />
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#if !NETCOREAPP
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using System.Runtime.CompilerServices;
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// Some routines inspired by the Stanford Bit Twiddling Hacks by Sean Eron Anderson:
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// http://graphics.stanford.edu/~seander/bithacks.html
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namespace System.Numerics
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{
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/// <summary>
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/// Utility methods for intrinsic bit-twiddling operations.
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/// The methods use hardware intrinsics when available on the underlying platform,
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/// otherwise they use optimized software fallbacks.
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/// </summary>
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internal static class BitOperations
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{
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/// <summary>
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/// Rotates the specified value left by the specified number of bits.
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/// Similar in behavior to the x86 instruction ROL.
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/// </summary>
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/// <param name="value">The value to rotate.</param>
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/// <param name="offset">The number of bits to rotate by.
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/// Any value outside the range [0..31] is treated as congruent mod 32.</param>
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/// <returns>The rotated value.</returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static uint RotateLeft(uint value, int offset)
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=> (value << offset) | (value >> (32 - offset));
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}
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}
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#endif
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