Arguments

 

add

   OpenVMS usage:word_signed
   type:         word (signed)
   access:       read only
   mechanism:    by reference

   The addend operand to be added to the value of sum. The add
   argument is the address of a signed word that contains the addend
   operand.
 

sum

   OpenVMS usage:word_signed
   type:         word integer (signed)
   access:       modify
   mechanism:    by reference

   The word to which add is added. The sum argument is the address
   of a signed word integer containing this value. The add operand
   is added to the sum operand, and the value of the sum argument is
   replaced by the result of this addition. The sum argument must be
   word-aligned; in other words, its address must be a multiple of
   2.
 

sign

   OpenVMS usage:word_signed
   type:         word integer (signed)
   access:       write only
   mechanism:    by reference

   Sign of the sum argument. The sign argument is the address of
   a signed word integer that is assigned the value -1, 0, or 1,
   depending on whether the new value of sum is negative, 0, or
   positive.