[AArch64] Refactor the Neon vector/scalar floating-point convert intrinsics so
that they use float/double rather than the vector equivalents when appropriate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196930 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed