Port-vax archive

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

Re: New Vax - future directions :-)

Den 2021-07-05 kl. 23:03, skrev Jason Thorpe:
On Jul 5, 2021, at 12:18 PM, Mouse <mouse%Rodents-Montreal.ORG@localhost> wrote:

It clears R0 and R1.  On VAX-32, that is.  It remains to be determined
what it would do on VAX-64 (in 64-bit mode, if the hardware is to be
dual-mode).  Personally, I would say it should clear just R0 (but all
64 bits of it).
IMO, CLRQ should be disallowed in 32-bit mode.
Well, CLRQ is actually the same as CLRD/CLRG, so it can't be disallowed :-)
Remember that floating point spans multiple registers as well.

-- R

Home | Main Index | Thread Index | Old Index