EQU * after a fullword aligned DS CL7 will happily place the EQU on an odd address, however, the assembler will halfword align the next machine instruction, inserting a slack byte, so you will get an 0C1 if you jump to that tag.
On Wed, Oct 2, 2024 at 3:58 PM David Spiegel < 00000468385049d1-dmarc-requ...@listserv.ua.edu> wrote: > Hi R'Shmuel AMV"SH, > I realize that DS 0H forces alignment. I was wondering if EQU * > does/does not. > > כתיבה וחתימה טובה > > Regards, > David > > > On 2024-10-02 11:33, Seymour J Metz wrote: > > It is still true that DS 0H forces alignment. > > > > -- > > Shmuel (Seymour J.) Metz > > http://mason.gmu.edu/~smetz3 > > עַם יִשְׂרָאֵל חַי > > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > > > > > > > ________________________________________ > > From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on > behalf of David Spiegel <00000468385049d1-dmarc-requ...@listserv.ua.edu> > > Sent: Wednesday, October 2, 2024 9:07 AM > > To: IBM-MAIN@LISTSERV.UA.EDU > > Subject: Re: Question on HLASM - B to a DROP statement!?! > > > > Caution: This email did not originate from George Mason’s mail system. > Do not click links or open attachments unless you recognize the sender and > know the content is safe. > > > > > > Hi Allan, > > As a rule, "DS 0H" used to be safer than "EQU *" since the former forces > > half-word alignment. > > (I do not know if that is still true.) > > > > Regards, > > David > > > > > > On 2024-10-02 08:38, Allan Staller wrote: > >> Classification: Confidential > >> > >> Suggested code change to resolve.. > >> > >> -----Original Message----- > >> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On > Behalf Of Steve Thompson > >> Sent: Tuesday, October 1, 2024 4:29 PM > >> To: IBM-MAIN@LISTSERV.UA.EDU > >> Subject: Question on HLASM - B to a DROP statement!?! > >> > >> Suggested code change to resolve: > >> > >> B DROPR11 > >> > >> DROPR11 EQU * > >> DROP R11 > >> LA R1,xxxxx (or something similar) > >> ---------------------------------------------------------------------- > >> For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > >> ::DISCLAIMER:: > >> ________________________________ > >> The contents of this e-mail and any attachment(s) are confidential and > intended for the named recipient(s) only. 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