Mercurial > hg > truffle
view src/cpu/sparc/vm/vm_version_sparc.hpp @ 266:2214b226b7f0
6724367: par compact could clear less young gen summary data
Reviewed-by: jmasa, apetrusenko
author | jcoomes |
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date | Fri, 11 Jul 2008 16:11:50 -0700 |
parents | 28372612af5e |
children | d1605aabd0a1 |
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/* * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ class VM_Version: public Abstract_VM_Version { protected: enum Feature_Flag { v8_instructions = 0, hardware_int_muldiv = 1, hardware_fsmuld = 2, v9_instructions = 3, vis1_instructions = 4, vis2_instructions = 5, sun4v_instructions = 6 }; enum Feature_Flag_Set { unknown_m = 0, all_features_m = -1, v8_instructions_m = 1 << v8_instructions, hardware_int_muldiv_m = 1 << hardware_int_muldiv, hardware_fsmuld_m = 1 << hardware_fsmuld, v9_instructions_m = 1 << v9_instructions, vis1_instructions_m = 1 << vis1_instructions, vis2_instructions_m = 1 << vis2_instructions, sun4v_m = 1 << sun4v_instructions, generic_v8_m = v8_instructions_m | hardware_int_muldiv_m | hardware_fsmuld_m, generic_v9_m = generic_v8_m | v9_instructions_m | vis1_instructions_m, ultra3_m = generic_v9_m | vis2_instructions_m, // Temporary until we have something more accurate niagara1_unique_m = sun4v_m, niagara1_m = generic_v9_m | niagara1_unique_m }; static int _features; static const char* _features_str; static void print_features(); static int determine_features(); static int platform_features(int features); static bool is_niagara1(int features) { return (features & niagara1_m) == niagara1_m; } static int maximum_niagara1_processor_count() { return 32; } // Returns true if the platform is in the niagara line and // newer than the niagara1. static bool is_niagara1_plus(); public: // Initialization static void initialize(); // Instruction support static bool has_v8() { return (_features & v8_instructions_m) != 0; } static bool has_v9() { return (_features & v9_instructions_m) != 0; } static bool has_hardware_int_muldiv() { return (_features & hardware_int_muldiv_m) != 0; } static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; } static bool has_vis1() { return (_features & vis1_instructions_m) != 0; } static bool has_vis2() { return (_features & vis2_instructions_m) != 0; } static bool supports_compare_and_exchange() { return has_v9(); } static bool is_ultra3() { return (_features & ultra3_m) == ultra3_m; } static bool is_sun4v() { return (_features & sun4v_m) != 0; } static bool is_niagara1() { return is_niagara1(_features); } static bool has_fast_fxtof() { return has_v9() && !is_ultra3(); } static const char* cpu_features() { return _features_str; } static intx L1_data_cache_line_size() { return 64; // default prefetch block size on sparc } // Prefetch static intx prefetch_copy_interval_in_bytes() { intx interval = PrefetchCopyIntervalInBytes; return interval >= 0 ? interval : (has_v9() ? 512 : 0); } static intx prefetch_scan_interval_in_bytes() { intx interval = PrefetchScanIntervalInBytes; return interval >= 0 ? interval : (has_v9() ? 512 : 0); } static intx prefetch_fields_ahead() { intx count = PrefetchFieldsAhead; return count >= 0 ? count : (is_ultra3() ? 1 : 0); } static intx allocate_prefetch_distance() { // This method should be called before allocate_prefetch_style(). intx count = AllocatePrefetchDistance; if (count < 0) { // default is not defined ? count = 512; } return count; } static intx allocate_prefetch_style() { assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive"); // Return 0 if AllocatePrefetchDistance was not defined. return AllocatePrefetchDistance > 0 ? AllocatePrefetchStyle : 0; } // Legacy static bool v8_instructions_work() { return has_v8() && !has_v9(); } static bool v9_instructions_work() { return has_v9(); } // Assembler testing static void allow_all(); static void revert(); // Override the Abstract_VM_Version implementation. static uint page_size_count() { return is_sun4v() ? 4 : 2; } // Calculates the number of parallel threads static unsigned int calc_parallel_worker_threads(); };