add various broken forms of fnstsw.  I didn't add the %rax
version because it adds a prefix and makes even less sense
than the other broken forms.  This wraps up rdar://8431422


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113932 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed