VMS Help MACRO, VAX MACRO Assembler, Instructions, PUSHR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Purpose:        Save multiple registers on stack
    Format:         opcode mask.rw
    Operation:      Save registers in order R0 .. R14
    C. Codes:       Not affected
    Exceptions:     None
    Opcode:         BB    PUSHR    Push registers
    Description:    The contents of the registers whose number corresponds

                    to set bits in the mask operand are pushed on the
                    stack as longwords. R[n] is pushed if mask <n> is set.
                    The mask is scanned from bit 14 to bit 0. Bit 15 is
                    ignored.