Added CeilInt and FloorInt ops as AArch64 NEON has instructions for round towards negative infinity (floor) and round towards positive infinity (ceiling) floating point to integer conversions and to provide a more efficient platform-specific implementation of CeilInt/FloorInt on SSE2 and SSSE3.
Added CeilInt and FloorInt ops as AArch64 NEON has instructions for round towards negative infinity (floor) and round towards positive infinity (ceiling) floating point to integer conversions and to provide a more efficient platform-specific implementation of CeilInt/FloorInt on SSE2 and SSSE3.