Paul G added
<snip>
>It does not check SYSSTATE AMODE64.
>
Don't be impatient.  They're probably working on it.
</snip>

In this case "they" are not. If someone had previously asked for it, it would 
have possibly already been done. It's always better to ask formally than to 
assume that mentioning something on IBM-Main will somehow make it happen.

FWIW, this kind of support (we call it "hollow" in that it allows the AMODE, 
but does not allow data in the corresponding RMODE, and the concept has existed 
at least since MVS/XA) precludes "full" AMODE 64 support that does support data 
above the bar without introducing a new keyword by which the caller asserts 
where their data resides (for compatibility reasons). But since it's unlikely 
there will ever be such "full" support, making this change is reasonable.

We would not unconditionally change the "L" to "LLGT" because LLGT is a 6-byte 
instruction.

Peter Relson
z/OS Core Technology Design


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