crypto/internal/bigmod: add comparison test for addMulVVW
Sized addMulVVW (addMulVVW1024 etc.) have architecture-specific
implementations on a number of architectures. Add a test checking
that they match the generic implementation.
Change-Id: I574f00ad7cd27d4e1bf008561023f713876244f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/628256
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Filippo Valsorda <filippo@golang.org>