On 11/17/2010 12:58 AM, Avi Kivity wrote: >> Actually in this case I'm pretty sure there's already a "set bit" >> function which will do the job. set_bit(), I guess, though it takes a >> bit number rather than a mask... >> > > > set_bit() operates on a long, while the intel manuals recommend > against operating on operands of different size, especially with > locked operations. I think newer processors have more relaxed > requirements, though.
Despite its prototype, set_bit() is pretty specifically using "orb" for a the constant case, or bts otherwise (I don't know what size memory operation bts is considered to generate). J _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/virtualization