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

    Purpose:        Rotate of integer
    Format:         opcode cnt.rb,src.rl,dst.wl
    Operation:      dst = src rotated cnt bits
    C. Codes:       N = {dst LSS 0}, Z = {dst EQL 0}, V = 0, C = C
    Exceptions:     None
    Opcode:         9C    ROTL     Rotate long
    Description:    The source operand is rotated logically by the number
                    of bits specified by the count operand and the
                    destination is replaced by the result. The source
                    operand is unaffected. A positive count rotates to the
                    left, a negative to the right. A 0 count leaves the
                    value unaffected.