zeroshade commented on code in PR #37785:
URL: https://github.com/apache/arrow/pull/37785#discussion_r1337352462


##########
go/parquet/internal/bmi/bmi_arm64.go:
##########
@@ -14,44 +14,51 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !noasm
 // +build !noasm
 
 package bmi
 
 import (
+       "fmt"
        "os"
        "strings"
-)
-import (
-       "golang.org/x/sys/cpu"

Review Comment:
   From what I could tell in my testing, it appears that on `golang1.20` and 
below, it was ending up false on arm64 platforms when it shouldn't. Try testing 
it on `golang1.20` instead of 1.21 and let me know, because that's what I was 
observing in my tests (and explains why we never caught this issue before now)



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