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Improvements with new .NET 5 functions or bugfixes (#1714)

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* Improvements with new .NET 5 functions or bugfixes

* This no longer needs to be unsafe
This commit is contained in:
gdkchan 2020-11-18 15:28:40 -03:00 • committed by GitHub
parent 7c3b559830
commit eafee34fee
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 11 additions and 41 deletions
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31
Ryujinx.Common/XXHash128.cs
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@ -66,33 +66,13 @@ namespace Ryujinx.Common
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private unsafe static Hash128 Mult64To128(ulong lhs, ulong rhs)
private static Hash128 Mult64To128(ulong lhs, ulong rhs)
{
// TODO: Use BigMul once .NET 5 lands.
if (Bmi2.X64.IsSupported)
{
ulong low;
ulong high = Bmi2.X64.MultiplyNoFlags(lhs, rhs, &low);
return new Hash128
{
Low = low,
High = high
};
}
ulong loLo = Mult32To64((uint)lhs, (uint)rhs);
ulong hiLo = Mult32To64(lhs >> 32, (uint)rhs);
ulong loHi = Mult32To64((uint)lhs, rhs >> 32);
ulong hiHi = Mult32To64(lhs >> 32, rhs >> 32);
ulong cross = (loLo >> 32) + (uint)hiLo + loHi;
ulong upper = (hiLo >> 32) + (cross >> 32) + hiHi;
ulong lower = (cross << 32) | (uint)loLo;
ulong high = Math.BigMul(lhs, rhs, out ulong low);
return new Hash128
{
Low = lower,
High = upper
Low = low,
High = high
};
}
@ -321,9 +301,10 @@ namespace Ryujinx.Common
return Xxh3Avalanche(result64);
}
[SkipLocalsInit]
private static Hash128 Xxh3HashLong128bInternal(ReadOnlySpan<byte> input, ReadOnlySpan<byte> secret)
{
Span<ulong> acc = stackalloc ulong[AccNb]; // TODO: Use SkipLocalsInit attribute once .NET 5 lands.
Span<ulong> acc = stackalloc ulong[AccNb];
Xxh3InitAcc.CopyTo(acc);
Xxh3HashLongInternalLoop(acc, input, secret);