Hi Jason, after looking into x86 SSE instructions in gem5 I have figured out that most of them are decoded into micro-ops which operate on floating point registers. Also, I looked at the discussion at the following link:
http://comments.gmane.org/gmane.comp.emulators.m5.devel/4404 After going through these, will I be wrong in concluding that labelling of SSE micro-ops as floating point micro-ops is correct for most of the cases ? I'm not sure how close is this implementation to real x86 processors, though. On Wed, Jun 22, 2016 at 2:12 PM, Ayaz Akram <aaq...@gmail.com> wrote: > Thanks Jason. I'll try to fix it and possibly submit a patch. > > > > On Wed, Jun 22, 2016 at 9:30 AM, Jason Lowe-Power <ja...@lowepower.com> > wrote: > >> To directly answer your question: The labeling of instruction in gem5 is >> not accurate at all. Feel free to fix the labeling and submit a patch to >> reviews.gem5.org, though! We'd welcome the fixes. >> >> BTW, you're correct that SIMD instructions are labeled as floating point >> instructions. I've noticed that too. >> >> Cheers, >> Jason >> >> On Tue, Jun 21, 2016 at 3:42 PM Ayaz Akram <aaq...@gmail.com> wrote: >> >>> I am running a small C program on gem5. Disassembled binary of the >>> program shows a lot of SSE instructions, but simulator's output stats.txt >>> does not show any SIMD operation type committed. On generating the >>> execution trace from gem5, I can see that those SSE instructions are >>> decoded into operations and labelled as FloatAdd or other similar >>> instructions. My question is, how accurate is the labelling of operations >>> in gem5 for x86 ? I mean it seems a bit misleading to see that no SIMD >>> instructions are committed , while the benchmark has some of them. >>> >>> Thanks >>> _______________________________________________ >>> gem5-users mailing list >>> gem5-users@gem5.org >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> >> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > >
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