Hello, If you're using a simulated CPU (i.e., *not* kvm) it doesn't matter what the underlying host architecture supports. From my experience, the ARM ISA is more complete that X86. There are many missing X86 instructions. Though, most of the missing X86 instructions are rare floating point instructions and SSE/MMX/etc. instructions.
If you're seeing different behavior on different computers, my best bet is that you haven't completely compiled your application statically and there are some libraries that are linked dynamically. Jason On Tue, May 15, 2018 at 12:54 PM Øyvind Harboe <[email protected]> wrote: > I only get this error message on my laptop at work, when I try it on my > machine at home I don't get this error message. > > W.r.t. supported instructions, does it matter what the host CPU supports? > > If it does, then I'm thinking I might do better with a completely > simulated target, like ARM than x86... > > On Tue, May 15, 2018 at 7:38 PM, Jason Lowe-Power <[email protected]> > wrote: > >> Hello, >> >> Yes. Those instructions are unimplemented, so you would have to implement >> them. There are some cases where unimplemented instructions can be ignored >> (e.g., hints to caches). However, if your application is using fdivr, it >> seems important. I wish I could give you a good pointer on how to implement >> an instruction. This homework from a few years ago may help >> http://pages.cs.wisc.edu/~david/courses/cs752/Fall2015/wiki/index.php?n=Main.Homework2 >> . >> >> PS: The git describe is not very useful. Keeping up to date with the HEAD >> at gem5.googlesource.com is your best bet. >> >> On Tue, May 15, 2018 at 6:22 AM Øyvind Harboe <[email protected]> >> wrote: >> >>> Is there something I have to do to enable support for the instructions >>> below? >>> >>> $ git describe --tags >>> copyright_update-7291-gce00e60 >>> $ scons -j8 --ignore-style build/X86/gem5.opt >>> $ build/X86/gem5.opt --listener-mode=off ../gem5/configs/example/se.py >>> -c a.out >>> [deleted] >>> warn: instruction 'fxam' unimplemented >>> warn: instruction 'fdivr' unimplemented >>> [deleted] >>> Exiting @ tick 1028958500 because exiting with last active thread context >>> >>> Sincerely, >>> -- >>> Øyvind Harboe, General Manager, Zylin AS, +47 917 86 146 >>> _______________________________________________ >>> gem5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> >> >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > > -- > Øyvind Harboe, General Manager, Zylin AS, +47 917 86 146 > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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