Seymour explains it to me I had the bctg beyond 4096
But the branch to address was within 4096 of the base > On Feb 26, 2025, at 10:04 AM, Seymour J Metz <[email protected]> wrote: > > Try JCT and JCTG. There's no reason to expect an error message on BCTG. > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > עַם יִשְׂרָאֵל חַי > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > > > ________________________________________ > From: IBM Mainframe Assembler List <[email protected]> on > behalf of Joe Reichman <[email protected]> > Sent: Wednesday, February 26, 2025 9:56 AM > To: [email protected] > Subject: Re: BCTG Instruction > > External Message: Use Caution > > > 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 <[email protected]> > Sent: Wednesday, February 26, 2025 9:53 AM > To: [email protected] > Cc: [email protected] > Subject: Re: BCTG Instruction > > > > Tried BCT instruction and didn’t generate assembly error > > > > > > On Feb 26, 2025, at 9:15 AM, [email protected] > <mailto:[email protected]> wrote: > > > > John > > > > Get Outlook for iOS <https://aka.ms/o0ukef> > > _____ > > From: IBM Mainframe Assembler List <[email protected] > <mailto:[email protected]> > on behalf of Seymour J Metz > <[email protected] <mailto:[email protected]> > > Sent: Wednesday, February 26, 2025 9:15:04 AM > To: [email protected] <mailto:[email protected]> > <[email protected] <mailto:[email protected]> > > 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 <[email protected] > <mailto:[email protected]> > on behalf of Binyamin Dissen > <[email protected] > <mailto:[email protected]> > > Sent: Wednesday, February 26, 2025 9:05 AM > To: [email protected] <mailto:[email protected]> > 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 <[email protected] > <mailto:[email protected]> > 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 <[email protected] > <mailto:[email protected]> > > 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
