Messages in this thread | | | From | "Russell Coker - mailing lists account" <> | Date | Fri, 25 Jul 97 22:26:36 +1100 | Subject | Re: Pentium emulation |
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>You have several PCs from 386 to Pentium (or Pentium II or whatever). You >also have programs that should run on any of your PCs. This means you have >to compile with the -m386 or -m486 option rather than optimizing for >Pentium. >Or you have a cool binary that has been compiled for Pentium but you want >to try it on a 486...
>Couldn't the kernel provide emulation of the Pentium instructions for the >386/486, to solve this problem? I guess it could be done since it would be >very similar to the FPU emulator.
>So the question is mainly: Would it make sense?
No. Emulating a Pentium would make 386/486 CPUs extremely slow. If you've got a mixture of CPUs then you're probably best off optimising for 486 (doesn't do any harm on a 386 and doesn't slow a Pentium down much) and putting in 387 emulation for the machines that need it.
It works for me.
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