steve smithers wrote:
Mark Morgan Lloyd wrote on Fri, 10 Feb 2012 21:37:52 +0000
I'm a bit worried that gas might not support all the arithmetic
operations that appear to be required by your examples, but at the same
time I still feel that Linux is the best initial target. Has anybody
ported a fully-featured IBM macro assembler to Linux?
To take your points in reverse order:
Tachyon produce a free HLA compatible assembler. IBM produce one that
may or may not be free. There may be others too.
The Tachyon one looks interesting, although I note that the free variant
is for non-commercial use only- I hope that doesn't cause anybody any
problems.
Yes. I agree, Linux/390 would seem a logical first step.
Reading around, I note that IBM started supporting IEEE maths with the
zSeries, not (as I previously thought) with the 390. I think that
implies that the best initial target would probably by zSeries running
Linux, with migration to other operating systems etc. following.
Gas is brain-dead, I wouldn't use it. It WON'T work for my examples as
it supports, as far I know, neither USING nor MACROs, let alone the
doubts you have.
I notice people discussing health warnings associated with the IBM macro
libraries- emphatically not in the public domain. I've definitely never
seen these, so if necessary I could be part of a cleanroom
reimplementation of what's needed.
I suppose there's a possibility that once the dust has settled it would
be possible to implement a preprocessor to allow gas to serve as a backend.
Finally, my examples are just that, examples. It is not a specification
for a final product, it is a wild theory based on zero knowlege of the
internals of the compiler. I can come up with a few others if you
don't like that one. In fact, episode 6 may just do that, but it will
be a while before it appears.
Hopefully I'm not the only person reading your notes with interest.
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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