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

    Purpose:        Clear or zero a scalar quantity
    Format:         opcode dst.wx
    Operation:      dst = 0
    C. Codes:       N = 0, Z = 1, V = 0, C = 0
    Exceptions:     None
    Opcodes:        94    CLRB     Clear byte
                    B4    CLRW     Clear word
                    D4    CLRL     Clear long
                    7C    CLRQ     Clear quad
                    7CFD  CLRO     Clear octa
                    D4    CLRF     Clear F_floating
                    7C    CLRD     Clear D_floating
                    7C    CLRG     Clear G_floating
                    7CFD  CLRH     Clear H_floating
    Description:    The destination operand is replaced by 0.