romcc and EPIA

[Stefan Reinauer]

* SONE Takeshi <ts1 at tsn.or.jp> [031003 10:47]:
> I noticed romcc has support for MMX/SSE registers and epia/Config.lb
> does not use it. Is there any problem using MMX registers on a C3?
> I also wonder why -mcpu=p3 is required to enable MMX support of romcc.
> IIRC, MMX has been supported since Pentium MMX and up, and Pentium III
> adds SSE.

On CPUs prior to PIII the mmx registers were shared with the floating
point unit. Switching between those was extremely slow. Don't know
whether this is an issue, since LinuxBIOS does not use fp 

  Stefan

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Architecture Team
    SuSE Linux AG