[Info-vax] Whither VMS?

[Bob Eager]

On Fri, 09 Oct 2009 01:35:48 +0000, glen herrmannsfeldt wrote:

> IA32 has special instructions for counting (in CX, ECX) and for
> incremented address load/store.  It is probably easier and maybe faster
> to do the counted loop.  Some loops can be done with one instruction
> with a LOOP prefix.

(a) LOOP isn't a prefix
(b) on modern CPUs, it's avoided because it's a very slow instruction..




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