RFR: 8256245: AArch64: Implement Base64 decoding intrinsic

[Andrew Haley]

On Sat, 27 Mar 2021 08:58:03 GMT, Dong Bo <dongbo at openjdk.org> wrote:

> There can be illegal characters at the start of the input if the data is MIME encoded.
> It would be no benefits to use SIMD for this case, so the stub use no-simd instructions for MIME encoded data now.

What is the reasoning here? Sure, there can be illegal characters at the start, but what if there are not? The generic logic uses decodeBlock() even in the MIME case, because we don't know that there certainly will be illegal characters.

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PR: https://git.openjdk.java.net/jdk/pull/3228