refactor: Remove extra NaN checking in comparison intrinsics
refactor: Remove extra NaN checking in comparison intrinsics

The NaN handling is included in the NEON comparison intrinsics.
The commit removes the extra NaN checking and rewrites some code
for simplicity.

DLTcollab/sse2neon,DLTcollab/sse2neon,DLTcollab/sse2neon