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<div class="moz-cite-prefix">Hi,<br>
<br>
The kernels works fine in double precision with 128-bit SSE on
x86.<br>
<br>
Cheers,<br>
<br>
Berk<br>
<br>
On 2020-11-26 09:25, Guido Giuntoli wrote:<br>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am building a minikernel of the 4 x N
kernel and testing it in different architectures. Currently I
am trying with in an ARMv8 with Advanced NEON using double-FP.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I see that this kernel operates with 4
particles at the time. When I use double-FP I can fill each
SIMD unit with 2 FP numbers (128 bits long for Advanced NEON).
I checked that that some interactions in this kernel between
the 4 particles are not performed: particle 3 and 4 have net
force = 0 (in this minikernel). Am I losing something here? Is
the kernel prepared to operate in double precision for vector
lengths of 128 bits? Is the masking mechanism intended to
solve this issue?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Note: when I use single-FP the 4 forces are
different from 0 as I expected.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks a lot for the help ;) <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;color:#666666">Best regards | Mit
freundlichen Grüßen</span></b><span
style="font-size:10.0pt;color:#666666"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;color:#666666"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;color:#666666">Guido Giuntoli</span></b><b><span
style="font-size:10.0pt;color:#1F497D"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;color:#666666"><o:p> </o:p></span></b></p>
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