auto-round

de2b48a6 - new cast_to_nvfp4 with high performance (#727)

new cast_to_nvfp4 with high performance (#727) * new cast_to_nvfp4 with high performance --------- Signed-off-by: Xin He <xinhe3@habana.ai> Co-authored-by: Xin He <xinhe3@habana.ai>