stan/jdk-24
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

8298472: AArch64: Detect Ampere-1 and Ampere-1A CPUs and set default options

Browse Source 
Reviewed-by: aph, ngasson
This commit is contained in:
Patrick Zhang 2023-01-09 11:07:05 +00:00 committed by Nick Gasson
parent 500c3c1737
commit 7068457436
2 changed files with 18 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2015, 2020, Red Hat Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
@ -132,7 +132,7 @@ void VM_Version::initialize() {
// Enable vendor specific features
// Ampere eMAG
if (_cpu == CPU_AMCC && (_model == 0) && (_variant == 0x3)) {
if (_cpu == CPU_AMCC && (_model == CPU_MODEL_EMAG) && (_variant == 0x3)) {
if (FLAG_IS_DEFAULT(AvoidUnalignedAccesses)) {
FLAG_SET_DEFAULT(AvoidUnalignedAccesses, true);
}
@ -144,6 +144,13 @@ void VM_Version::initialize() {
}
}
// Ampere CPUs: Ampere-1 and Ampere-1A
if (_cpu == CPU_AMPERE && ((_model == CPU_MODEL_AMPERE_1) || (_model == CPU_MODEL_AMPERE_1A))) {
if (FLAG_IS_DEFAULT(UseSIMDForMemoryOps)) {
FLAG_SET_DEFAULT(UseSIMDForMemoryOps, true);
}
}
// ThunderX
if (_cpu == CPU_CAVIUM && (_model == 0xA1)) {
guarantee(_variant != 0, "Pre-release hardware no longer supported.");

10
src/hotspot/cpu/aarch64/vm_version_aarch64.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, 2020, Red Hat Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
@ -102,6 +102,14 @@ public:
CPU_APPLE = 'a',
};
enum Ampere_CPU_Model {
CPU_MODEL_EMAG = 0x0, /* CPU implementer is CPU_AMCC */
CPU_MODEL_ALTRA = 0xd0c, /* CPU implementer is CPU_ARM, Neoverse N1 */
CPU_MODEL_ALTRAMAX = 0xd0c, /* CPU implementer is CPU_ARM, Neoverse N1 */
CPU_MODEL_AMPERE_1 = 0xac3, /* CPU implementer is CPU_AMPERE */
CPU_MODEL_AMPERE_1A = 0xac4 /* CPU implementer is CPU_AMPERE */
};
#define CPU_FEATURE_FLAGS(decl) \
decl(FP, fp, 0) \
decl(ASIMD, asimd, 1) \