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8194494: SHA-512 stub uses AVX 2 instructions on non-supporting CPUs

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Check for supports_avx2() && supports_bmi2() before generating SHA-512 stub.

Reviewed-by: kvn
This commit is contained in:
Tobias Hartmann 2018-01-05 10:23:57 +01:00
parent 98601408f0
commit 34f553d15f
1 changed files with 1 additions and 1 deletions
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2
src/hotspot/cpu/x86/vm_version_x86.cpp
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@ -882,7 +882,7 @@ void VM_Version::get_processor_features() {
FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
}
if (UseSHA) {
if (UseSHA && supports_avx2() && supports_bmi2()) {
if (FLAG_IS_DEFAULT(UseSHA512Intrinsics)) {
FLAG_SET_DEFAULT(UseSHA512Intrinsics, true);
}