From c080143ca8daee3d71ef098e6961eaf034c379d6 Mon Sep 17 00:00:00 2001
From: Artsiom Korzun <72259616+artsiomkorzun@users.noreply.github.com>
Date: Tue, 16 Jan 2024 21:54:42 +0100
Subject: [PATCH] fix masking (#442)

fix masking

fix masking
---
 .../dev/morling/onebrc/CalculateAverage_artsiomkorzun.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/dev/morling/onebrc/CalculateAverage_artsiomkorzun.java b/src/main/java/dev/morling/onebrc/CalculateAverage_artsiomkorzun.java
index 4ea9d58..c3c39ab 100644
--- a/src/main/java/dev/morling/onebrc/CalculateAverage_artsiomkorzun.java
+++ b/src/main/java/dev/morling/onebrc/CalculateAverage_artsiomkorzun.java
@@ -431,7 +431,8 @@ public class CalculateAverage_artsiomkorzun {
         }
 
         private static long mask(long word, long separator) {
-            return word & ((separator >>> 7) - 1) & 0x00FFFFFFFFFFFFFFL;
+            long mask = ((separator - 1) ^ separator) >>> 8;
+            return word & mask;
         }
 
         private static int length(long separator) {