VMS Help RTL Routines, LIB$, LIB$FFx  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The Find First Clear or Set Bit routines search the field
    specified by the start position, size, and base for the first
    clear or set bit. LIB$FFC and LIB$FFS make the VAX FFC and VAX
    FFS instructions available as callable routines.

    Format

      LIB$FFC  position ,size ,base ,find-position

      LIB$FFS  position ,size ,base ,find-position

  Additional Information (explode) :

• Returns
• Arguments