On Mon, 27 Apr 2015 12:05:47 -0500, Donald Likens <[email protected]> wrote:
>What am I missing? Isn't PLO Function Codes 16-19 (Compare and Swap and Double >Store) updating three locations? > >Direct out of the "Principle of Operations": > >The first-operand comparison value is compared >to the second operand. When the first-operand >comparison value is equal to the second operand, >the first-operand replacement value is stored at >the second-operand location, the third operand is >stored at the fourth-operand location, the fifth >operand is stored at the sixth-operand location, >and condition code 0 is set. > >I see three stores in the above text. Yes, you see 3 stores. The first is the "swap" listed in the operation name and the other 2 are the "Double Store". -- Walt ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
