Can't use any 16f nppi functions within a Xavier

Hi,
I use Visionworks and NPP to build a custom graph. Firstly, I use all 32f functions like nppiMulC_32f_C3R,nppiLn_32f_C3R etc. It’s well done. When I changed to using 16f functions like nppiMulC_16f_C3R,nppiLn_16f_C3R , got some errors:
error: ‘Npp16f’ was not declared in this scope
error: ‘nppiDivC_16f_C3R’ was not declared in this scope
So , what’s the problem? Is it not support to use 16f function?