test/codegen: codify handling of floating point constants on arm64
While here, reorder Float32ConstantStore/Float64ConstantStore for
consistency.
Change-Id: Ic1b3e9f9474965d15bc94518d78d1a4a7bda93f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/703756 Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Joel Sing <joel@sing.id.au> Reviewed-by: Keith Randall <khr@google.com>