Integrated: 8349106: Change ChaCha20 intrinsic to use quarter-round parallel implementation on aarch64

[Jamil Nimeh]

On Fri, 31 Jan 2025 16:48:09 GMT, Jamil Nimeh <jnimeh at openjdk.org> wrote:

> This enhancement makes a change to the ChaCha20 block function intrinsic on aarch64, moving away from the block parallel implementation and to the quarter-round parallel implementation that was done on x86_64.  Assembly language profiling yielded an 11% improvement in throughput.  When put together as an intrinsic and hooked into the JCE ChaCha20 cipher, the gains are more modest, somewhere in the 2-4% range depending on job size, but still an improvement.

This pull request has now been integrated.

Changeset: ee4caa41
Author:    Jamil Nimeh <jnimeh at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/ee4caa4180e76911ee75148583c2923f847f8605
Stats:     166 lines in 1 file changed: 71 ins; 1 del; 94 mod

8349106: Change ChaCha20 intrinsic to use quarter-round parallel implementation on aarch64

Reviewed-by: aph

-------------

PR: https://git.openjdk.org/jdk/pull/23397