This can be used to provide better instruction selection for assembly
implementations without having to implement two variants and dynamic
runtime selections when a newer GOPPC64 value is used.
Change-Id: I4331037d57b128137280aa7904d08d362391f81e
Reviewed-on: https://go-review.googlesource.com/c/go/+/449115
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com> Reviewed-by: Cherry Mui <cherryyz@google.com>