vm_version_sparc.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25class VM_Version: public Abstract_VM_Version { 26protected: 27 enum Feature_Flag { 28 v8_instructions = 0, 29 hardware_mul32 = 1, 30 hardware_div32 = 2, 31 hardware_fsmuld = 3, 32 hardware_popc = 4, 33 v9_instructions = 5, 34 vis1_instructions = 6, 35 vis2_instructions = 7, 36 sun4v_instructions = 8 37 }; 38 39 enum Feature_Flag_Set { 40 unknown_m = 0, 41 all_features_m = -1, 42 43 v8_instructions_m = 1 << v8_instructions, 44 hardware_mul32_m = 1 << hardware_mul32, 45 hardware_div32_m = 1 << hardware_div32, 46 hardware_fsmuld_m = 1 << hardware_fsmuld, 47 hardware_popc_m = 1 << hardware_popc, 48 v9_instructions_m = 1 << v9_instructions, 49 vis1_instructions_m = 1 << vis1_instructions, 50 vis2_instructions_m = 1 << vis2_instructions, 51 sun4v_m = 1 << sun4v_instructions, 52 53 generic_v8_m = v8_instructions_m | hardware_mul32_m | hardware_div32_m | hardware_fsmuld_m, 54 generic_v9_m = generic_v8_m | v9_instructions_m, 55 ultra3_m = generic_v9_m | vis1_instructions_m | vis2_instructions_m, 56 57 // Temporary until we have something more accurate 58 niagara1_unique_m = sun4v_m, 59 niagara1_m = generic_v9_m | niagara1_unique_m 60 }; 61 62 static int _features; 63 static const char* _features_str; 64 65 static void print_features(); 66 static int determine_features(); 67 static int platform_features(int features); 68 69 static bool is_niagara1(int features) { return (features & sun4v_m) != 0; } 70 71 static int maximum_niagara1_processor_count() { return 32; } 72 // Returns true if the platform is in the niagara line and 73 // newer than the niagara1. 74 static bool is_niagara1_plus(); 75 76public: 77 // Initialization 78 static void initialize(); 79 80 // Instruction support 81 static bool has_v8() { return (_features & v8_instructions_m) != 0; } 82 static bool has_v9() { return (_features & v9_instructions_m) != 0; } 83 static bool has_hardware_mul32() { return (_features & hardware_mul32_m) != 0; } 84 static bool has_hardware_div32() { return (_features & hardware_div32_m) != 0; } 85 static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; } 86 static bool has_hardware_popc() { return (_features & hardware_popc_m) != 0; } 87 static bool has_vis1() { return (_features & vis1_instructions_m) != 0; } 88 static bool has_vis2() { return (_features & vis2_instructions_m) != 0; } 89 90 static bool supports_compare_and_exchange() 91 { return has_v9(); } 92 93 static bool is_ultra3() { return (_features & ultra3_m) == ultra3_m; } 94 static bool is_sun4v() { return (_features & sun4v_m) != 0; } 95 static bool is_niagara1() { return is_niagara1(_features); } 96 97 static bool has_fast_fxtof() { return has_v9() && !is_ultra3(); } 98 99 static const char* cpu_features() { return _features_str; } 100 101 static intx L1_data_cache_line_size() { 102 return 64; // default prefetch block size on sparc 103 } 104 105 // Prefetch 106 static intx prefetch_copy_interval_in_bytes() { 107 intx interval = PrefetchCopyIntervalInBytes; 108 return interval >= 0 ? interval : (has_v9() ? 512 : 0); 109 } 110 static intx prefetch_scan_interval_in_bytes() { 111 intx interval = PrefetchScanIntervalInBytes; 112 return interval >= 0 ? interval : (has_v9() ? 512 : 0); 113 } 114 static intx prefetch_fields_ahead() { 115 intx count = PrefetchFieldsAhead; 116 return count >= 0 ? count : (is_ultra3() ? 1 : 0); 117 } 118 119 static intx allocate_prefetch_distance() { 120 // This method should be called before allocate_prefetch_style(). 121 intx count = AllocatePrefetchDistance; 122 if (count < 0) { // default is not defined ? 123 count = 512; 124 } 125 return count; 126 } 127 static intx allocate_prefetch_style() { 128 assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive"); 129 // Return 0 if AllocatePrefetchDistance was not defined. 130 return AllocatePrefetchDistance > 0 ? AllocatePrefetchStyle : 0; 131 } 132 133 // Legacy 134 static bool v8_instructions_work() { return has_v8() && !has_v9(); } 135 static bool v9_instructions_work() { return has_v9(); } 136 137 // Assembler testing 138 static void allow_all(); 139 static void revert(); 140 141 // Override the Abstract_VM_Version implementation. 142 static uint page_size_count() { return is_sun4v() ? 4 : 2; } 143 144 // Calculates the number of parallel threads 145 static unsigned int calc_parallel_worker_threads(); 146}; 147