duke@435: /* trims@1907: * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. duke@435: * duke@435: */ duke@435: duke@435: class VM_Version: public Abstract_VM_Version { duke@435: protected: duke@435: enum Feature_Flag { twisti@1076: v8_instructions = 0, twisti@1076: hardware_mul32 = 1, twisti@1076: hardware_div32 = 2, twisti@1076: hardware_fsmuld = 3, twisti@1078: hardware_popc = 4, twisti@1078: v9_instructions = 5, twisti@1078: vis1_instructions = 6, twisti@1078: vis2_instructions = 7, twisti@1078: sun4v_instructions = 8 duke@435: }; duke@435: duke@435: enum Feature_Flag_Set { twisti@1076: unknown_m = 0, twisti@1076: all_features_m = -1, duke@435: twisti@1076: v8_instructions_m = 1 << v8_instructions, twisti@1076: hardware_mul32_m = 1 << hardware_mul32, twisti@1076: hardware_div32_m = 1 << hardware_div32, twisti@1076: hardware_fsmuld_m = 1 << hardware_fsmuld, twisti@1078: hardware_popc_m = 1 << hardware_popc, twisti@1076: v9_instructions_m = 1 << v9_instructions, twisti@1076: vis1_instructions_m = 1 << vis1_instructions, twisti@1076: vis2_instructions_m = 1 << vis2_instructions, twisti@1076: sun4v_m = 1 << sun4v_instructions, duke@435: twisti@1076: generic_v8_m = v8_instructions_m | hardware_mul32_m | hardware_div32_m | hardware_fsmuld_m, twisti@1076: generic_v9_m = generic_v8_m | v9_instructions_m, twisti@1076: ultra3_m = generic_v9_m | vis1_instructions_m | vis2_instructions_m, duke@435: duke@435: // Temporary until we have something more accurate twisti@1076: niagara1_unique_m = sun4v_m, twisti@1076: niagara1_m = generic_v9_m | niagara1_unique_m duke@435: }; duke@435: duke@435: static int _features; duke@435: static const char* _features_str; duke@435: duke@435: static void print_features(); duke@435: static int determine_features(); duke@435: static int platform_features(int features); duke@435: twisti@1076: static bool is_niagara1(int features) { return (features & sun4v_m) != 0; } duke@435: jmasa@445: static int maximum_niagara1_processor_count() { return 32; } jmasa@445: // Returns true if the platform is in the niagara line and jmasa@445: // newer than the niagara1. jmasa@445: static bool is_niagara1_plus(); jmasa@445: duke@435: public: duke@435: // Initialization duke@435: static void initialize(); duke@435: duke@435: // Instruction support duke@435: static bool has_v8() { return (_features & v8_instructions_m) != 0; } duke@435: static bool has_v9() { return (_features & v9_instructions_m) != 0; } twisti@1076: static bool has_hardware_mul32() { return (_features & hardware_mul32_m) != 0; } twisti@1076: static bool has_hardware_div32() { return (_features & hardware_div32_m) != 0; } duke@435: static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; } twisti@1078: static bool has_hardware_popc() { return (_features & hardware_popc_m) != 0; } duke@435: static bool has_vis1() { return (_features & vis1_instructions_m) != 0; } duke@435: static bool has_vis2() { return (_features & vis2_instructions_m) != 0; } duke@435: duke@435: static bool supports_compare_and_exchange() duke@435: { return has_v9(); } duke@435: duke@435: static bool is_ultra3() { return (_features & ultra3_m) == ultra3_m; } duke@435: static bool is_sun4v() { return (_features & sun4v_m) != 0; } duke@435: static bool is_niagara1() { return is_niagara1(_features); } duke@435: duke@435: static bool has_fast_fxtof() { return has_v9() && !is_ultra3(); } duke@435: duke@435: static const char* cpu_features() { return _features_str; } duke@435: duke@435: static intx L1_data_cache_line_size() { duke@435: return 64; // default prefetch block size on sparc duke@435: } duke@435: duke@435: // Prefetch duke@435: static intx prefetch_copy_interval_in_bytes() { duke@435: intx interval = PrefetchCopyIntervalInBytes; duke@435: return interval >= 0 ? interval : (has_v9() ? 512 : 0); duke@435: } duke@435: static intx prefetch_scan_interval_in_bytes() { duke@435: intx interval = PrefetchScanIntervalInBytes; duke@435: return interval >= 0 ? interval : (has_v9() ? 512 : 0); duke@435: } duke@435: static intx prefetch_fields_ahead() { duke@435: intx count = PrefetchFieldsAhead; duke@435: return count >= 0 ? count : (is_ultra3() ? 1 : 0); duke@435: } duke@435: duke@435: static intx allocate_prefetch_distance() { duke@435: // This method should be called before allocate_prefetch_style(). duke@435: intx count = AllocatePrefetchDistance; duke@435: if (count < 0) { // default is not defined ? duke@435: count = 512; duke@435: } duke@435: return count; duke@435: } duke@435: static intx allocate_prefetch_style() { duke@435: assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive"); duke@435: // Return 0 if AllocatePrefetchDistance was not defined. duke@435: return AllocatePrefetchDistance > 0 ? AllocatePrefetchStyle : 0; duke@435: } duke@435: duke@435: // Legacy duke@435: static bool v8_instructions_work() { return has_v8() && !has_v9(); } duke@435: static bool v9_instructions_work() { return has_v9(); } duke@435: duke@435: // Assembler testing duke@435: static void allow_all(); duke@435: static void revert(); duke@435: duke@435: // Override the Abstract_VM_Version implementation. duke@435: static uint page_size_count() { return is_sun4v() ? 4 : 2; } jmasa@445: jmasa@445: // Calculates the number of parallel threads jmasa@445: static unsigned int calc_parallel_worker_threads(); duke@435: };