Messages in this thread | | | Date | Thu, 7 Dec 2006 16:20:50 +0300 | From | Ivan Kokshaysky <> | Subject | Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it |
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On Thu, Dec 07, 2006 at 08:31:08PM +1100, Nick Piggin wrote: > It might be reasonable to implement this watered down version, but: > don't some architectures have restrictions on what instructions can > be issued between the ll and the sc?
Yes. On Alpha you cannot execute other load/stores, taken branches etc. So in general case the code between ll and sc cannot be written in C...
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