zhanchangbao-sanechips commented on code in PR #51340:
URL: https://github.com/apache/arrow/pull/51340#discussion_r4386888212


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cpp/src/arrow/util/dispatch_internal.h:
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@@ -221,6 +222,16 @@ constexpr DynamicDispatchTarget<Func> BestDispatchTarget(
 #  define ARROW_DISPATCH_TARGET_SVE512(func)
 #endif
 
+#if defined(ARROW_HAVE_RVV) || defined(ARROW_HAVE_RUNTIME_RVV)
+#  define ARROW_DISPATCH_TARGET_RVV(func)      \

Review Comment:
   > I don't think that is right, we want per-vector width macros just like for 
SVE.
   
   Thank you for your review,you're right, and I've split RVV into 
per-vector-width macros to match SVE.



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