[X86][Btver2] Add CVTSI2SD/CVTSI2SS scheduler costs

We still need to account for how Jaguar passes data from GPR -> XMM, which isn't as clean as XMM -> GPR.....

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328551 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed