On 17 February 2014 19:34, Bernd Oppolzer <[email protected]> wrote: > I could imagine some use cases for a new instruction, that supresses > the execution of the next instruction, depending on certain values of the > condition code. For example SKIP NEXT INSTRUCTION IF NOT ZERO, > or IF ZERO. [...] > I'm sure, that some historical machines had such concepts ...
Indeed this is the way conditional execution and branching works (and has always worked) in channel programs. There is only one testable flag, and all instructions are the same length, but it is very much the notion of if <something> skip the next instruction. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
