Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Fix IsSupported guard check for use of Ssse3.Shuffle in Span.Reverse #69623

Merged
merged 1 commit into from
May 21, 2022
Merged

Fix IsSupported guard check for use of Ssse3.Shuffle in Span.Reverse #69623

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion src/libraries/System.Private.CoreLib/src/System/SpanHelpers.Byte.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2374,7 +2374,7 @@ public static void Reverse(ref byte buf, nuint length)
buf = ref Unsafe.Add(ref buf, numIters * numElements);
length -= numIters * numElements * 2;
}
else if (Sse2.IsSupported && (nuint)Vector128<byte>.Count * 2 <= length)
else if (Ssse3.IsSupported && (nuint)Vector128<byte>.Count * 2 <= length)
{
Vector128<byte> reverseMask = Vector128.Create((byte)15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
nuint numElements = (nuint)Vector128<byte>.Count;
Expand Down
2 changes: 1 addition & 1 deletion src/libraries/System.Private.CoreLib/src/System/SpanHelpers.Char.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2061,7 +2061,7 @@ public static void Reverse(ref char buf, nuint length)
bufByte = ref Unsafe.Add(ref bufByte, numIters * numElements);
length -= numIters * (nuint)Vector256<short>.Count * 2;
}
else if (Sse2.IsSupported && (nuint)Vector128<short>.Count * 2 <= length)
else if (Ssse3.IsSupported && (nuint)Vector128<short>.Count * 2 <= length)
{
Vector128<byte> reverseMask = Vector128.Create((byte)14, 15, 12, 13, 10, 11, 8, 9, 6, 7, 4, 5, 2, 3, 0, 1);
nuint numElements = (nuint)Vector128<byte>.Count;
Expand Down