Thanks, was it any problems regarding certain instructions/operations
and if so, had you some interestion solutions for them ?
TIA
Thomas Berg
====== Tom Harper ====== wrote 2005-09-21 05:41:
Thomas,
We have used the long-displacement instructions to allow for the generation of additional "compiled" code over the short-displacement instructions, if the machine environment supports them, removing the old size limitations of +/- 64K. It was really not all that difficult to implement (baseless code generation). We have actually converted most of our critical-path instruction sequences to baseless code, believing future machines will execute these instructions faster, due to fewer base-register interlocks. This was fairly straight-foward using the structured programming facilities of HLASM.
Tom Harper
________________________________
From: IBM Mainframe Discussion List on behalf of Thomas Berg
Sent: Tue 9/20/2005 9:10 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: z/Architecture Principles of Operation (SA22-7832-04)
Have anyone used the long-displacement facility instructions
(as in consistently do so to reduce base register usage) ?
Are there any pitfalls or limitations that a relatively
inexperienced programmer should be aware of ?
Btw, why is there no "MVCY" instruction ? Is it because of
the existence of the MVCL instruction or .. ?
TIA
Thomas Berg
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