37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From 70641d56fb22355a85ad142700ae721a6a293908 Mon Sep 17 00:00:00 2001
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Date: Tue, 25 Jun 2019 10:40:42 +0000
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Subject: [PATCH] Backport of JDK-8191955
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summary: incorrect prefetch distance causes an internal error
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LLT:
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Bug url: https://bugs.openjdk.java.net/browse/JDK-8191955
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---
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hotspot/src/cpu/aarch64/vm/vm_version_aarch64.cpp | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/hotspot/src/cpu/aarch64/vm/vm_version_aarch64.cpp b/hotspot/src/cpu/aarch64/vm/vm_version_aarch64.cpp
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index f64e356558..ebdfeadf57 100644
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--- a/hotspot/src/cpu/aarch64/vm/vm_version_aarch64.cpp
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+++ b/hotspot/src/cpu/aarch64/vm/vm_version_aarch64.cpp
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@@ -144,6 +144,17 @@ void VM_Version::get_processor_features() {
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if (PrefetchCopyIntervalInBytes >= 32768)
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PrefetchCopyIntervalInBytes = 32760;
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}
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+
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+ if (AllocatePrefetchDistance !=-1 && (AllocatePrefetchDistance & 7)) {
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+ warning("AllocatePrefetchDistance must be multiple of 8");
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+ AllocatePrefetchDistance &= ~7;
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+ }
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+
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+ if (AllocatePrefetchStepSize & 7) {
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+ warning("AllocatePrefetchStepSize must be multiple of 8");
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+ AllocatePrefetchStepSize &= ~7;
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+ }
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+
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FLAG_SET_DEFAULT(UseSSE42Intrinsics, true);
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unsigned long auxv = getauxval(AT_HWCAP);
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--
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2.19.0-rc1
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