[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] x86 emulation: fix bswap
>>> Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> 15.02.07 11:33 >>> >On 15/2/07 10:22, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > >> REX.R needs to be decoded and since bswap on a 16-bit operand is undefined, >> it is best to have hardware execute this so the emulation result matches >> hardware behavior. Since it is simple to do, faster, and smaller, also let >> hardware do 32- and 64-bit ones. > >Can 'undefined' behaviour include e.g. #UD? I don't think so. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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