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
