John, This is the first time I have had to take exception to a fact that you said and that is on the comment that we need a 8i multiple.
Even with 64-bit addressing, it doesn't change the length of a branch or jump, they are still 4 bytes. A jump long is 6 bytes, so maybe 6i is possible, but that is a weird number to deal with in a binary environment. Of course you could use 8i with the following B *+4(R15) JLU COND0 NOPR 0 never executed, just here to fill space JLU COND8 NOPR 0 JLU COND16 NOPR 0 ... I think I will continue to prefer the more traditional 4i solution. Chris Blaicher Principal Software Engineer, Software Development Syncsort Incorporated 50 Tice Boulevard, Woodcliff Lake, NJ 07677 P: 201-930-8260 | M: 512-627-3803 E: cblaic...@syncsort.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of John Gilmore Sent: Wednesday, May 08, 2013 2:39 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Return codes There are also situations in which one wants to be able to set more than one of the diagnostic bits in a return code additively and unambiguously, and the alternative use of 0, 2, 4, 8, 16, . . . , i.e., the sequence 2^i, i = 0, 1, 2, . . . , powers of 2, permits this to be done. Still, the fact that successive branch-table addresses always differed by four bytes in probably explains the 4i, i = 0, 1, 2, . . . convention best. Now, of course, we need 8i, i= 0, 1, . . . , i.e., 0, 8, 16, 24, . . . John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ATTENTION: ----- The information contained in this message (including any files transmitted with this message) may contain proprietary, trade secret or other confidential and/or legally privileged information. Any pricing information contained in this message or in any files transmitted with this message is always confidential and cannot be shared with any third parties without prior written approval from Syncsort. This message is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any use, disclosure, copying or distribution of this message, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or Syncsort and destroy all copies of this message in your possession, custody or control. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN