/sys$common/syshlp/helplib.hlb MACRO, VAX MACRO Assembler, Directives, .BLKx, .BLKF  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Reserves   storage   for   single-precision    floating-point
    data (longwords).

    .BLKF expression

    expression

    An expression specifying the amount of storage to be allocated.