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<p class="MsoNormal"><span style="font-size:11.0pt">Hi Chen,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks for the feedback.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The intrinsics is 1.07-1.18x speedup comparing to SVE asm, 1.03-1.18x speedup comparing
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">to Neon asm, depending on the block sizes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Li<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">chen <chenm003@163.com><br>
<b>Date: </b>Wednesday, 2025. June 18. at 6:37<br>
<b>To: </b>Development for x265 <x265-devel@videolan.org><br>
<b>Cc: </b>nd <nd@arm.com>, Li Zhang <Li.Zhang2@arm.com><br>
<b>Subject: </b>Re:[x265] [PATCH 0/4] AArch64: Optimize and add pixel_var Implementations<o:p></o:p></span></p>
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<p style="margin:0in"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Hi Li,<o:p></o:p></span></p>
<p style="margin:0in"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p style="margin:0in"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Thank for the patches, it looks good to me, the only question is how much<o:p></o:p></span></p>
<p style="margin:0in"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">improve on the performance after change asm to intrinsic.<o:p></o:p></span></p>
<p style="margin:0in"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p style="margin:0in"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Regards,<br>
Chen<o:p></o:p></span></p>
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<pre><span style="color:black">At 2025-06-18 02:22:25, "Li Zhang" <li.zhang2@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 optimizes the exisiting standard bit-depth pixel_var<o:p></o:p></span></pre>
<pre><span style="color:black">>Neon intrinsics implementation, deletes the slower assembly<o:p></o:p></span></pre>
<pre><span style="color:black">>implementation. It also adds Neon DotProd intrinsics implementation for<o:p></o:p></span></pre>
<pre><span style="color:black">>the standard bit-depth and Neon, SVE intrinsics implementations for the<o:p></o:p></span></pre>
<pre><span style="color:black">>high bit-depth of pixel_var function.<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">>Li<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">>Li Zhang (4):<o:p></o:p></span></pre>
<pre><span style="color:black">> AArch64: Optimize and clean up SBD pixel_var functions<o:p></o:p></span></pre>
<pre><span style="color:black">> AArch64: Add HBD pixel_var Neon intrinscis implementations<o:p></o:p></span></pre>
<pre><span style="color:black">> AArch64: Add SBD pixel_var Neon DotProd intrinsics implementations<o:p></o:p></span></pre>
<pre><span style="color:black">> AArch64: Add HBD pixel_var SVE intrinsics implementations<o:p></o:p></span></pre>
<pre><span style="color:black">><o:p> </o:p></span></pre>
<pre><span style="color:black">> source/common/CMakeLists.txt | 4 +-<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/asm-primitives.cpp | 14 +-<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/fun-decls.h | 10 -<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/neon-sve-bridge.h | 7 +<o:p></o:p></span></pre>
<pre><span style="color:black">> .../aarch64/pixel-prim-neon-dotprod.cpp | 111 ++++++++++<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-prim-sve.cpp | 137 ++++++++++++<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-prim.cpp | 197 +++++++++++++++---<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-prim.h | 6 +<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-util-common.S | 27 ---<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-util-sve2.S | 195 -----------------<o:p></o:p></span></pre>
<pre><span style="color:black">> source/common/aarch64/pixel-util.S | 61 ------<o:p></o:p></span></pre>
<pre><span style="color:black">> 11 files changed, 434 insertions(+), 335 deletions(-)<o:p></o:p></span></pre>
<pre><span style="color:black">> create mode 100644 source/common/aarch64/pixel-prim-neon-dotprod.cpp<o:p></o:p></span></pre>
<pre><span style="color:black">> create mode 100644 source/common/aarch64/pixel-prim-sve.cpp<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">>2.39.5 (Apple Git-154)<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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