Skip to content

Adding support for the Qualcomm processor family #26646

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
wants to merge 1 commit into
base: master
Choose a base branch
from
+6 −4
Draft

Adding support for the Qualcomm processor family #26646

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -364,8 +364,8 @@ void VM_Version::initialize() {
if (UseSHA && VM_Version::supports_sha3()) {
// Auto-enable UseSHA3Intrinsics on hardware with performance benefit.
// Note that the evaluation of UseSHA3Intrinsics shows better performance
// on Apple silicon but worse performance on Neoverse V1 and N2.
if (_cpu == CPU_APPLE) { // Apple silicon
// on Apple and Qualcomm silicon but worse performance on Neoverse V1 and N2.
if (_cpu == CPU_APPLE || _cpu == CPU_QUALCOM) { // Apple or Qualcom silicon
if (FLAG_IS_DEFAULT(UseSHA3Intrinsics)) {
FLAG_SET_DEFAULT(UseSHA3Intrinsics, true);
}
Expand Down
6 changes: 4 additions & 2 deletions src/hotspot/os_cpu/windows_aarch64/vm_version_windows_aarch64.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,8 @@ void VM_Version::get_os_cpu_info() {
_cpu = CPU_AMCC;
} else if (buf && strstr(buf, "Cavium Inc.") != nullptr) {
_cpu = CPU_CAVIUM;
} else if (buf && strstr(buf, "Qualcomm Technologies Inc") != nullptr) {
_cpu = CPU_QUALCOM;
} else {
log_info(os)("VM_Version: unknown CPU model");
}
Expand All @@ -92,8 +94,8 @@ void VM_Version::get_os_cpu_info() {
SYSTEM_INFO si;
GetSystemInfo(&si);
_model = si.wProcessorLevel;
_variant = si.wProcessorRevision / 0xFF;
_revision = si.wProcessorRevision & 0xFF;
_variant = (si.wProcessorRevision >> 8) & 0xFF; // Variant is the upper byte of wProcessorRevision
_revision = si.wProcessorRevision & 0xFF; // Revision is the lower byte of wProcessorRevision
}
}
}
Expand Down