[Info-vax] Beyond Open Source
Simon Clubley
clubley at remove_me.eisner.decus.org-Earth.UFP
Mon May 18 20:32:16 EDT 2015
On 2015-05-11, johnwallace4 at yahoo.co.uk <johnwallace4 at yahoo.co.uk> wrote:
>
> Non-DEC: I'm also aware of a gcc/gas situation where the
> compiler is expected to workaround a misfeature in the hardware
> which if not properly handled leads to unexpected results.
>
> This will not be the one Roland's been referencing (well, it's
> almost infinitely improbable that it will) because it's a rather
> obscure target and it's highly unlikely anyone here has ever
> heard of it, let alone programmed for it. Unless you're a close
> follower of gcc cauldron and/or Adacore.
>
> I wasn't a compiler developer or hardware developer but colleagues
> were. I'm not in a position to post details here, however, ask
> nicely and you might get email (which won't be very exciting).
>
> That doesn't tell us anything about Roland's issue, but this one
> is certainly genuine, and it would be a surprise if issues similar
> weren't hiding away somewhere on other more complex and more
> widely deployed targets.
A quick hunt around found an old one for the Axis Cris architecture:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14471
I also found this for the Cortex-A53:
https://sourceware.org/bugzilla/show_bug.cgi?id=18348
It doesn't sound like it's either of those however.
Simon.
--
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world
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