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

    Purpose:        Add with carry - perform extended-precision addition
    Format:         opcode add.rl,sum.ml
    Operation:      sum = sum + add + C
    C. Codes:       N = {sum LSS 0}, Z = {sum EQL 0},
                    V = {integer overflow}, C = {carry from MSB}
    Exceptions:     Integer overflow
    Opcode:         D8    ADWC     Add with carry