cmd/internal/obj/arm64: load large constants into vector registers from rodata
Load large constants into vector registers from rodata, instead of placing them
in the literal pool. This treats VMOVQ/VMOVD/VMOVS the same as FMOVD/FMOVS and
makes use of the existing mechanism for storing values in rodata. Two additional
instructions are required for a load, however these instructions are used
infrequently and already have a high latency.
Updates #59615
Change-Id: I54226730267689963d73321e548733ae2d66740e
Reviewed-on: https://go-review.googlesource.com/c/go/+/515617 Reviewed-by: Eric Fang <eric.fang@arm.com> Reviewed-by: Carlos Amedee <carlos@golang.org>
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>