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8220566: AArch64: Set default vm features for Ampere eMAG CPUs

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Set defaults for vendor specific features

Reviewed-by: adinn
This commit is contained in:
Patrick Zhang 2019-03-12 11:49:52 +08:00
parent b34264403a
commit 2f7b5f59e2
1 changed files with 13 additions and 0 deletions
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13
src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
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@ -194,6 +194,19 @@ void VM_Version::get_processor_features() {
// Enable vendor specific features
// Ampere eMAG
if (_cpu == CPU_AMCC && (_model == 0) && (_variant == 0x3)) {
if (FLAG_IS_DEFAULT(AvoidUnalignedAccesses)) {
FLAG_SET_DEFAULT(AvoidUnalignedAccesses, true);
}
if (FLAG_IS_DEFAULT(UseSIMDForMemoryOps)) {
FLAG_SET_DEFAULT(UseSIMDForMemoryOps, true);
}
if (FLAG_IS_DEFAULT(UseSIMDForArrayEquals)) {
FLAG_SET_DEFAULT(UseSIMDForArrayEquals, !(_revision == 1 || _revision == 2));
}
}
// ThunderX
if (_cpu == CPU_CAVIUM && (_model == 0xA1)) {
if (_variant == 0) _features |= CPU_DMB_ATOMICS;