84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
/*
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* Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012, 2025 SAP SE. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef CPU_PPC_VM_VERSION_PPC_HPP
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#define CPU_PPC_VM_VERSION_PPC_HPP
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#include "runtime/abstract_vm_version.hpp"
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#include "runtime/globals_extension.hpp"
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class VM_Version: public Abstract_VM_Version {
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protected:
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enum Feature_Flag {
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darn,
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brw,
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num_features // last entry to count features
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};
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enum Feature_Flag_Set {
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unknown_m = 0,
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darn_m = (1 << darn ),
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brw_m = (1 << brw ),
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all_features_m = (unsigned long)-1
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};
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static bool _is_determine_features_test_running;
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static void print_features();
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static void determine_features(); // also measures cache line size
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static void config_dscr(); // Power 8: Configure Data Stream Control Register.
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public:
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// Initialization
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static void initialize();
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static void check_virtualizations();
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// Override Abstract_VM_Version implementation
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static void print_platform_virtualization_info(outputStream*);
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// PPC64 supports fast class initialization checks
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static bool supports_fast_class_init_checks() { return true; }
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constexpr static bool supports_stack_watermark_barrier() { return true; }
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constexpr static bool supports_recursive_lightweight_locking() { return true; }
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constexpr static bool supports_secondary_supers_table() { return true; }
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static bool supports_float16() { return PowerArchitecturePPC64 >= 9; }
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static bool is_determine_features_test_running() { return _is_determine_features_test_running; }
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// CPU instruction support
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static bool has_darn() { return (_features & darn_m) != 0; }
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static bool has_brw() { return (_features & brw_m) != 0; }
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// Assembler testing
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static void allow_all();
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static void revert();
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// POWER 8: DSCR current value.
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static uint64_t _dscr_val;
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static void initialize_cpu_information(void);
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};
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#endif // CPU_PPC_VM_VERSION_PPC_HPP
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