# HG changeset patch
# User njian
# Date 1512093408 -28800
#      Fri Dec 01 09:56:48 2017 +0800
# Node ID 3ac6cd186e3524ff338d0dae474bbb555b35b090
# Parent  0a52219cfb168db8849bb8da264d8c1999fabbef
8191955: AArch64: incorrect prefetch distance causes an internal error
Reviewed-by: aph

diff --git a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
--- a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
@@ -148,6 +148,16 @@
       PrefetchCopyIntervalInBytes = 32760;
   }
 
+  if (AllocatePrefetchDistance !=-1 && (AllocatePrefetchDistance & 7)) {
+    warning("AllocatePrefetchDistance must be multiple of 8");
+    AllocatePrefetchDistance &= ~7;
+  }
+
+  if (AllocatePrefetchStepSize & 7) {
+    warning("AllocatePrefetchStepSize must be multiple of 8");
+    AllocatePrefetchStepSize &= ~7;
+  }
+
   if (SoftwarePrefetchHintDistance != -1 &&
        (SoftwarePrefetchHintDistance & 7)) {
     warning("SoftwarePrefetchHintDistance must be -1, or a multiple of 8");