jonas at zeus.ugent.be
Wed Oct 13 16:38:02 CEST 2004
On 12 okt 2004, at 22:12, Marc Weustink wrote:
> M:> Is a sigbus catchable so that you can read the data and continue
> as if nothing happened (or is that something at OS level)
That is normally possible, yes. But as Florian said, it's quite a bit
of work and also extremely slow (you get 4 context switches per
unaligned access, + the work to load the value).
> M:> Let the user take care of alignment makes me a bit itchy. I don't
> get a good feeling with it.
I think it's normal he has to. We also don't emulate the 80-bit
extended type on processors which only have a 64-bit double precision
fpu. We also don't emulate endianess. Portability has a lot of
> M:> But how are members of packed records accessed ?
Just like members of regular records. The difference is that there are
simply no alignment bytes between the different fields of the record.
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