tree a9f38aa74fa358cc7052d7389bdf939241d15a0f
parent df358638a97d7bbf6f8764c932b1ae9a37d601a9
author Jonathan Wright <jonathan.wright@arm.com> 1654034870 +0100
committer James Zern <jzern@google.com> 1662604442 +0000

Use dedicated Arm hardware instructions to compute CRC32C hash

Add an implementation of the CRC32C hash function that uses the
dedicated CRC32C instructions in the Armv8-A architecture.

The Arm CRC32C instructions are optional in Armv8.0-A but mandatory
in all architecture revisions starting from Armv8.1-A. For the time
being, we detect the presence of the CRC32C instructions at compile
time but run-time feature detection ought to be implemented for
platforms like Android where an architecture baseline of Armv8.1-A
cannot be assumed.

Change-Id: I30894ec77dd79c87eeafcdefc9e4b061cd5106d6