Messages in this thread | | | From | (Alan Cox) | Subject | Re: CPU options during config | Date | Fri, 8 Jan 1999 15:53:12 +0000 (GMT) |
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> isn't there any way to capture a software interrupt when these new > instructions/features are used on an old processor? i've worked on
Yes. Unknown instructions raise illegal instruction. There are also a set of "official" ways to check chips. The problem is the run time cost of testing often outweights the time saved. Thats why Linus stuff on the "with TSC" compile makes a lot of sense.
Alan
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