[X86] Describe wbnoinvd instruction

Similar to the wbinvd instruction, except this
one does not invalidate caches. Ring 0 only.
The encoding matches a wbinvd instruction with
an F3 prefix.

Reviewers: craig.topper, zvi, ashlykov

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D43816


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329847 91177308-0d34-0410-b5e6-96231b3b80d8
14 files changed