Re: [Xen-devel] [PATCH optional v2 01/10] hvm/hpet: Add manual unit test code.

[Don Slutz <dslutz@xxxxxxxxxxx>]

On 04/11/14 11:14, Jan Beulich wrote:
> > > > On 11.04.14 at 14:48, <dslutz@xxxxxxxxxxx> wrote:
> > On 04/11/14 08:09, Jan Beulich wrote:
> > > > > > On 11.04.14 at 13:57, <dslutz@xxxxxxxxxxx> wrote:
> > > > I see that that test is not passing:
> > > >
> > > > make -C tools/tests/x86_emulator run
> > > > ...
> > > > Testing daa/das (all inputs)...         skipped
> > > > Testing movq %mm3,(%ecx)...             okay
> > > > Testing movq (%edx),%mm5...             okay
> > > > Testing movdqu %xmm2,(%ecx)...          okay
> > > > Testing movdqu (%edx),%xmm4...          okay
> > > > Testing vmovdqu %ymm2,(%ecx)...         failed!
> > > Odd - it worked the last time I tried. Was that perhaps on an AVX-
> > > incapable system?
> > Is avx from /proc/cpuinfo:
> Interesting - I just tried it again, and it works for me. Could of course
> be an issue with your glibc clobbering %ymm2 - I always wondered for
> how long we would get away with this not really correct register usage.
> But otoh I would have expected the earlier test using %xmm2 to fail
> then too...

Not sure what I can do to help.  A quick gdb says:

Testing movzxwd (%%eax),%%ecx...        okay
Testing xadd %%ax,(%%ecx)...            okay
Testing dec %%ax...                     okay
Testing lea 8(%%ebp),%%eax...           okay
Testing daa/das (all inputs)...         skipped
Testing movq %mm3,(%ecx)...             okay
Testing movq (%edx),%mm5...             okay

Breakpoint 4, main (argc=<optimized out>, argv=<optimized out>) at 
test_x86_emulator.c:610
610             if ( (rc != X86EMUL_OKAY) || memcmp(res, res + 8, 32) )
(gdb) p rc
$3 = 0
(gdb) c
Continuing.
Testing movdqu %xmm2,(%ecx)...          okay
Testing movdqu (%edx),%xmm4...          okay

Breakpoint 3, main (argc=<optimized out>, argv=<optimized out>) at 
test_x86_emulator.c:661
661             if ( (rc != X86EMUL_OKAY) || memcmp(res, res + 16, 64) )
(gdb) p rc
$4 = 7
(gdb) q


This is from 4.3.1...

    -Don Slutz

> Jan

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