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    SubjectRe: Cyrix M2
    Mike Jagdis wrote:
    > >
    > > (Cyrix had to use FP registers for MMX to be at all compatible
    > > with Intel. I don't think they liked having to do it :-). Intel
    > > did it to save the cost of engineering their silicon to hold a
    > > few more registers.)

    On Apr 24, Joerg Pommnitz wrote
    > AFAIK the main reason was, not to break existing operating systems.
    > These OS don't know how to save MMX registers on task switchs. I
    > don't see how Cyrix would have solved this problem.

    Wouldn't be hard to put in a state bit which defaults to MMX overlays
    FP but could be set to MMX independent of FP. [Presuming you wanted
    to invest in the real estate for the separate register set.]


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