pitrou commented on a change in pull request #9424:
URL: https://github.com/apache/arrow/pull/9424#discussion_r639851772
##########
File path: cpp/src/arrow/util/byte_stream_split.h
##########
@@ -23,25 +23,33 @@
#include <stdint.h>
#include <algorithm>
+#if defined(ARROW_HAVE_NEON) || defined(ARROW_HAVE_SSE4_2)
+#include <xsimd/xsimd.hpp>
+// Enable the SIMD for ByteStreamSplit Decoder
+#define ARROW_HAVE_SIMD_DECODE_SPLIT
+#endif
+
#ifdef ARROW_HAVE_SSE4_2
Review comment:
Sorry for the delay. It would be more logical to put everything in this
single PR, IMHO.
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