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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.
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