Port-vax archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

Re: CAS?

> [...], or if it might be worth some work to rewrite these to as far
> as possible use VAX primitive instructions for the needs instead.

Offhand, I would guess that whoever did it looked for a few things like
compare-and-store, ll/sc, test-and-set, thought the VAX didn't have any
of them, and went the slow route, not discovering things like BBCCI and
INSQHI.  The VAX isn't _quite_ old enough to lack such things entirely,
but it _is_ old enough to have preliminary forms of them rather than
the forms more recent processors have settled on. :-)

But, since I'm not that whoever, I don't really know.  I may be
maligning someone unjustly with that suspicion.

/~\ The ASCII                             Mouse
\ / Ribbon Campaign
 X  Against HTML                mouse%rodents-montreal.org@localhost
/ \ Email!           7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B

Home | Main Index | Thread Index | Old Index