In this case, there was a USING *,R12 at the beginning of the csect and the target was 000000A0 into the csect, well within the 4 KiB limit. WAD.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר ________________________________________ From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU> on behalf of Jonathan Scott <jonathan.scott...@gmail.com> Sent: Wednesday, February 26, 2025 10:09 AM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: BCTG Instruction External Message: Use Caution If the target has really been defined in low storage, requiring no base register, then you wouldn't get an error. And of course the branch is not relative for BCTG, but is resolved via a USING statement with an appropriate base register, or via the implicit "USING 0,0" which will trigger a helpful warning if the option FLAG(PAGE0) is used. Jonathan Scott -----Original Message----- From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU> On Behalf Of Joe Reichman Sent: 26 February 2025 14:57 To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: BCTG Instruction Tried BCT instruction and didn’t generate an error as well Joe Reichman Joe Reichman Lead Developer Sam Golob Systems Programming LLC 71-28 163 St Apt 1A Fresh Meadows NY 11365 From: Joseph Reichman <reichman...@gmail.com> Sent: Wednesday, February 26, 2025 9:53 AM To: reichman...@gmail.com Cc: ASSEMBLER-LIST@listserv.uga.edu Subject: Re: BCTG Instruction Tried BCT instruction and didn’t generate assembly error On Feb 26, 2025, at 9:15 AM, reichman...@gmail.com <mailto:reichman...@gmail.com> wrote: John Get Outlook for iOS <https://aka.ms/o0ukef> _____ From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU <mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU> > on behalf of Seymour J Metz <sme...@gmu.edu <mailto:sme...@gmu.edu> > Sent: Wednesday, February 26, 2025 9:15:04 AM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU <mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU> <ASSEMBLER-LIST@LISTSERV.UGA.EDU <mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU> > Subject: Re: BCTG Instruction I suspect that is what he meant. Note that it's signed. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר ________________________________________ From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU <mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU> > on behalf of Binyamin Dissen <00001773bcccb823-dmarc-requ...@listserv.uga.edu <mailto:00001773bcccb823-dmarc-requ...@listserv.uga.edu> > Sent: Wednesday, February 26, 2025 9:05 AM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU <mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU> Subject: Re: BCTG Instruction External Message: Use Caution Did you perhaps wish to use BRCTG ? But that doesn't use a base register. The I2 field is the number of halfwords offset from the instruction. On Wed, 26 Feb 2025 07:51:39 -0500 Joe Reichman <reichman...@gmail.com <mailto:reichman...@gmail.com> > wrote: :>Hi :> :> :>My understanding of this new instruction is that it is a BCT with a new 20 :>bit displacement. :> :>The object code layout of this6 byte instruction has in bit 20 - 31 the 12 :>bit displacement and if the address exceeds 4096 decimal the new bit :>displacement would get populated in bits :> :>32 - 40 :> :>I tried out a BCTG R9,LONGDISP :> :>Where the address of longdisp was beyond 4096 and yet I don't see bits 32 - :>40 of the instruction being populated :> :> So here is the example :> :>LONGDISP is beyond 4,096 and in bits 31 - 40 there is zeros :> :> :>00A0 LONGDISP DS 0H :> :> 2E60 E390 00A0 00 46 BCTG R9,LONGDISP :> -- Binyamin Dissen <bdis...@dissensoftware.com <mailto:bdis...@dissensoftware.com> > http://secure-web.cisco.com/10VvBXXP13I9QdFmSqp2I-Ib4_bsUk1XQkyAoTHK6iKBL-9V_SoZUmE6Ah9XPIWUfh4utzXEsjM1WIwl4pvjXn2_sKGIcrw1PR1P-jL2-c1P55KN20OYJpv9QnekdN57NXSt5Mxz4CzSZKTK5NgKVUSBdmYiR370gKKvXJ0FDoSrBdw6E_vNXYaTD3FPK0eQaUSnk1bV5Unku0FtMuyMnqH6Zw4KT-2cugodLTddAAAb4UwpMnQ9lk31kDyapEgRqmx03VcVMGMmFH0dQs9QirorclZQwOuXMMmS7jUs4PG8c7bZvIWi1S7h28RWx_CY3urbNq_f7Lsd1bRHuJeo9ygtkQ0Cnl89znmA6icxTZ6OKONXVD5UpMPQbeFnlYkZFd5dYKRiLunO35XhepByfYamd6dnnnbUyO_1Z52DdScU/http%3A%2F%2Fwww.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel
