Martin,
The retcode is all important here for condition code checking in
later steps.
Ed
On Feb 11, 2016, at 8:26 AM, Martin Packer wrote:
Humour me and tell us all what setting the 4 bits in 15 means here.
I had
actually looked at the green card on my home office wall (no
really) and
figured the BCR 15,14 part out.
Thanks, Martin
Martin Packer,
zChampion, Principal Systems Investigator,
Worldwide Cloud & Systems Performance, IBM
+44-7802-245-584
email: [email protected]
Twitter / Facebook IDs: MartinPacker
Blog:
https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker
From: "Cannaerts, Jan" <[email protected]>
To: [email protected]
Date: 11/02/2016 14:17
Subject: Re: AW: Re: You thought IEFBR14 was bad? Try GNU's
/bin/true code
Sent by: IBM Mainframe Discussion List <IBM-
[email protected]>
Considering IBM's practicing of OCO (if that was in place at the
time of
that APAR's release?), why would IEFBR14 have needed an APAR to add
equates? Equates or no equates, the object code would have remained
the
same; 1BFF 07FE. It's a source code thing only.
The addition of setting the return code however, did add 2 bytes to
the
object code, and thus would have warranted an APAR/PTF.
Pedant that I am; the second instruction is, per the PoP, "BCR
15,14". BR,
BNZ, BZ, BNE, ... are shorthand for BCR with its different
condition code
masks, but are not instructions themselves.
Regards,
Jan
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-
[email protected]] On
Behalf Of Mike Myers
Sent: donderdag 11 februari 2016 2:12
To: [email protected]
Subject: Re: AW: Re: You thought IEFBR14 was bad? Try GNU's /bin/true
code
Robert and all:
To set the record straight, I looked at the object code, which is:
1BFF07FE, or
SR 15,15
BR 14
I believe the second APAR was the addition of equates for R14 and R15
and to change the code to
SR R15,R15
BR R14
because the former failed to meet programming standards.
Mike Myers
Mentor Services Corporation
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