HELPLIB.HLB  —  RTL Routines, LIB$  LIB$EXTV
    The Extract a Field and Sign-Extend routine returns a sign-
    extended longword field that has been extracted from the
    specified variable bit field. LIB$EXTV makes the VAX EXTV
    instruction available as a callable routine.

    Format

      LIB$EXTV  position ,size ,base-address
Additional Information: explode extract
Returns Arguments
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