91 lines
3.1 KiB
C#
91 lines
3.1 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System.Diagnostics;
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#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
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using System.Runtime.CompilerServices;
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#endif
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Math.Raw
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{
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internal static class Bits
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{
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#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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#endif
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internal static uint BitPermuteStep(uint x, uint m, int s)
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{
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Debug.Assert((m & (m << s)) == 0U);
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Debug.Assert((m << s) >> s == m);
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uint t = (x ^ (x >> s)) & m;
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return t ^ (t << s) ^ x;
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}
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#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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#endif
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internal static ulong BitPermuteStep(ulong x, ulong m, int s)
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{
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Debug.Assert((m & (m << s)) == 0UL);
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Debug.Assert((m << s) >> s == m);
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ulong t = (x ^ (x >> s)) & m;
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return t ^ (t << s) ^ x;
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}
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#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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#endif
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internal static void BitPermuteStep2(ref uint hi, ref uint lo, uint m, int s)
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{
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#if NETSTANDARD2_1_OR_GREATER || NETCOREAPP1_1_OR_GREATER || UNITY_2021_2_OR_NEWER
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//Debug.Assert(!Unsafe.AreSame(ref hi, ref lo) || (m & (m << s)) == 0U);
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#endif
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Debug.Assert((m << s) >> s == m);
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uint t = ((lo >> s) ^ hi) & m;
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lo ^= t << s;
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hi ^= t;
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}
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#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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#endif
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internal static void BitPermuteStep2(ref ulong hi, ref ulong lo, ulong m, int s)
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{
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#if NETSTANDARD2_1_OR_GREATER || NETCOREAPP1_1_OR_GREATER || UNITY_2021_2_OR_NEWER
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//Debug.Assert(!Unsafe.AreSame(ref hi, ref lo) || (m & (m << s)) == 0UL);
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#endif
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Debug.Assert((m << s) >> s == m);
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ulong t = ((lo >> s) ^ hi) & m;
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lo ^= t << s;
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hi ^= t;
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}
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#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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#endif
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internal static uint BitPermuteStepSimple(uint x, uint m, int s)
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{
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Debug.Assert((m & (m << s)) == 0U);
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Debug.Assert((m << s) >> s == m);
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return ((x & m) << s) | ((x >> s) & m);
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}
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#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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#endif
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internal static ulong BitPermuteStepSimple(ulong x, ulong m, int s)
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{
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Debug.Assert((m & (m << s)) == 0UL);
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Debug.Assert((m << s) >> s == m);
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return ((x & m) << s) | ((x >> s) & m);
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}
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}
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}
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#pragma warning restore
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#endif
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