That requires a byte of addressable storage. In the code that I now write, I 
try to avoid using any base registers. However, I also write new code as LE 
enabled (and both "re-entrant" and "pure" - no modifying any location within a 
CSECT), so I do end up with a register addressing the DSA. I guess that I've 
just gotten a dislike for doing storage operations unless they are really 
necessary. In any case, as I have been informed, the TMLL instruction works on 
my z9BC; so I will now use it.

--
John McKown
Systems Engineer IV
IT

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HealthMarkets(r)

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> -----Original Message-----
> From: IBM Mainframe Assembler List [mailto:ASSEMBLER-
> l...@listserv.uga.edu] On Behalf Of Robin Vowels
> Sent: Tuesday, August 28, 2012 10:21 AM
> To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
> Subject: Re: which instructions should I use?
>
> From: "McKown, John" <john.mck...@healthmarkets.com>
> Sent: Tuesday, 28 August 2012 10:27 PM
>
>
> > Value to be tested is in a register, not storage.
>
> Again, how about no registers? (version 2)
>     STC 15,X
>     TM    X,3
>     BNZ    ...
>
> >> -----Original Message-----
> >> From: IBM Mainframe Assembler List [mailto:ASSEMBLER-
> >> l...@listserv.uga.edu] On Behalf Of Robin Vowels
> >> Sent: Monday, August 27, 2012 8:27 PM
> >> To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
> >> Subject: Re: which instructions should I use?
> >>
> >> How about no registers?
> >>
> >> TM X+3,3
> >> BNZ ...

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