Messages in this thread |  | | Subject | Re: [PATCH] change name of rep_nop | Date | Tue, 9 Oct 2001 12:30:39 +0100 (BST) | From | Alan Cox <> |
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> Hello, > > __asm__ __volatile__("rep;nop"); > > "The behavior of the REP prefix is undefined when used with non-string > instructions." page 3-404 of Intel documentation, in "CHAPTER 3, > INSTRUCTION SET REFERENCE"... > > How about: __asm__ __volatile__("loop ." : "+c" (nbloop)); ?
rep nop is a magic instruction to powersave momentarily on the Pentium 4. It happens to be a true nop on the older processors - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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