RFR: 8142362: Lots of code duplication in Copy class [v2]

[Coleen Phillimore]

On Thu, 6 Jan 2022 22:25:02 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Removed an unused assembly function on one platform (_Copy_conjoint_bytes), and consolidated the linux and bsd x86, and linux and bsd aarch64 copy code that was duplicated.  There's unfortunately now an #ifndef _WINDOWS in copy_x86.hpp and copy_aarch64.hpp, and I couldn't combine the duplicate copy_<arch>.S files because Windows doesn't have this file (and couldn't convince the build system to ignore the .S file for windows).
>> I didn't think it was worth adding an os_cpu/posix_x86 and os_cpu/posix_aarch64 directory for this small bit of code.
>> 
>> There could be more consolidation but the platform differences are subtle.  This change just moves around code without poking this bear.
>> 
>> Tested with tier1 on Oracle platforms, build on linux-x86-open,linux-s390x-open,linux-arm32-debug,linux-ppc64le-debug and Zero (zero in progress).
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix Windows aarch64

Thanks Vladimir, oops, I need to update my copyright script.

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PR: https://git.openjdk.java.net/jdk/pull/6984