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<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">Hi Chen,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">The performance in the commitmsg of weight_pp for SBD is relative to the removed Neon asm.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">The new intrinsics code is faster when CTZ(w0) < shift (e.g. w0 = 127, shift = 6) and equal in other cases.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#3B3B3B">Relative performance compared to Neon asm [SBD]:<br>
(w0 = 64)<br>
Neoverse N1: 1.19x<br>
Neoverse N2: 1.00x<br>
Neoverse V1: 1.10x<br>
Neoverse V2: 1.01x<br>
(w0 = 127)<br>
Neoverse N1: 3.05x<br>
Neoverse N2: 3.63x<br>
Neoverse V1: 3.25x<br>
Neoverse V2: 3.58x</span><span style="font-size:11.0pt;mso-fareast-language:EN-US">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">Regards,<br>
Micro<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">chen <chenm003@163.com><br>
<b>Date: </b>Tuesday, 8 April 2025 at 03:32<br>
<b>To: </b>Development for x265 <x265-devel@videolan.org><br>
<b>Cc: </b>nd <nd@arm.com>, Micro Daryl Robles <MicroDaryl.Robles@arm.com><br>
<b>Subject: </b>Re:[x265] [PATCH 0/2] Add Neon impl of planecopy_cp and weight_pp<o:p></o:p></span></p>
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<p style="margin:0cm"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Hi Micro,<o:p></o:p></span></p>
<p style="margin:0cm"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p style="margin:0cm"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">How about performance compare to removed weight_pp_neon?<o:p></o:p></span></p>
<p style="margin:0cm"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p style="margin:0cm"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Regards,<o:p></o:p></span></p>
<p style="margin:0cm"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Chen<o:p></o:p></span></p>
<p style="margin:0cm"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<pre><span style="color:black">At 2025-04-07 18:57:14, "Micro Daryl Robles" <microdaryl.robles@arm.com> wrote:<o:p></o:p></span></pre>
<pre><span style="color:black">>Hi,<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">>This patch series adds Neon intrinsic implementations of<o:p></o:p></span></pre>
<pre><span style="color:black">>planecopy_cp and weight_pp that work for both SBD and HBD.<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">>This series is based on the master branch.<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">>Many thanks,<o:p></o:p></span></pre>
<pre><span style="color:black">>Micro<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">>Micro Daryl Robles (2):<o:p></o:p></span></pre>
<pre><span style="color:black">> AArch64: Add SBD and HBD Neon implementation of planecopy_cp<o:p></o:p></span></pre>
<pre><span style="color:black">> AArch64: Add SBD and HBD Neon implementation of weight_pp<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/asm-primitives.cpp | 4 -<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/fun-decls.h | 3 -<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-prim.cpp | 183 +++++++++++++++++++++++<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-util.S | 144 ------------------<o:p></o:p></span></pre>
<pre><span style="color:black">> source/test/pixelharness.cpp | 50 +++++--<o:p></o:p></span></pre>
<pre><span style="color:black">> 5 files changed, 217 insertions(+), 167 deletions(-)<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">>-- <o:p></o:p></span></pre>
<pre><span style="color:black">>2.34.1<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">>_______________________________________________<o:p></o:p></span></pre>
<pre><span style="color:black">>x265-devel mailing list<o:p></o:p></span></pre>
<pre><span style="color:black">>x265-devel@videolan.org<o:p></o:p></span></pre>
<pre><span style="color:black">>https://mailman.videolan.org/listinfo/x265-devel<o:p></o:p></span></pre>
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