Re: [Xen-devel] test_x86_emulator

[Don Slutz <dslutz@xxxxxxxxxxx>]

On 04/15/14 02:49, Jan Beulich wrote:
> > > > On 14.04.14 at 19:29, <dslutz@xxxxxxxxxxx> wrote:
> > It is more complex then it appears at 1st look.
> >
> > -O1:
> > ...
> > Testing movdqu (%edx),%xmm4...          okay
> > Testing vmovdqu %ymm2,(%ecx)...         skipped
> > Testing vmovdqu (%edx),%ymm4...         skipped
> > Testing movsd %xmm5,(%ecx)...           okay
> > Testing movaps (%edx),%xmm7...          okay
> > ...
> >
> > -O2:
> > ...
> > Testing movdqu (%edx),%xmm4...          okay
> > Testing vmovdqu %ymm2,(%ecx)...         failed!
> > make: *** [run] Error 1
> Now that's of course very interesting - looks more like a problem
> with test_x86_emulator.c's use of CPUID then (because you said
> you do this on an AVX-capable system, the -O1 test shouldn't skip
> these).
>
> > get_fpu (exception_callback=0x402a60 <fpu_handle_exception>,
> > exception_callback_arg=0x7fffffffd7d0,
> >       type=X86EMUL_FPU_ymm, ctxt=0x7fffffffdb80) at test_x86_emulator.c:138
> > 138         switch ( type )
> > (gdb) n
> > 137     {
> > (gdb)
> > 138         switch ( type )
> > (gdb)
> > 154         return X86EMUL_OKAY;
> > (gdb)
> > 138         switch ( type )
> > (gdb)
> > 152             return X86EMUL_UNHANDLEABLE;
> > (gdb)
> > 138         switch ( type )
> > (gdb)
> > 132     int get_fpu(
> > (gdb)
> > 155     }
> Or a code generation problem: An input of X86EMUL_FPU_ymm should
> obviously result in execution making to the respective case statement,
> yet the steps above lead directly to the default one.
>
> What gcc version are you using? And could you perhaps make both
> binaries (-O1 and -O2) available for inspection?
dcs-xen-54:~/xen/tools/tests/x86_emulator>gcc --version
gcc (GCC) 4.7.2 20120921 (Red Hat 4.7.2-2)

Attached are the binaries.

   -Don Slutz
> Jan

Attachment: x86_emulate.o.O2
Description: Binary data

Attachment: x86_emulate.o.O1
Description: Binary data

Attachment: test_x86_emulator.o.O1
Description: Binary data

Attachment: test_x86_emulator.o.O2
Description: Binary data

Attachment: blowfish.o.O2
Description: Binary data

Attachment: blowfish.o.O1
Description: Binary data

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