Mon, 11 Oct 2010 04:18:58 -0700
6829194: JSR 292 needs to support compressed oops
Reviewed-by: kvn, jrose
duke@435 | 1 | /* |
trims@1907 | 2 | * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | class VM_Version: public Abstract_VM_Version { |
duke@435 | 26 | protected: |
duke@435 | 27 | enum Feature_Flag { |
twisti@1076 | 28 | v8_instructions = 0, |
twisti@1076 | 29 | hardware_mul32 = 1, |
twisti@1076 | 30 | hardware_div32 = 2, |
twisti@1076 | 31 | hardware_fsmuld = 3, |
twisti@1078 | 32 | hardware_popc = 4, |
twisti@1078 | 33 | v9_instructions = 5, |
twisti@1078 | 34 | vis1_instructions = 6, |
twisti@1078 | 35 | vis2_instructions = 7, |
twisti@1078 | 36 | sun4v_instructions = 8 |
duke@435 | 37 | }; |
duke@435 | 38 | |
duke@435 | 39 | enum Feature_Flag_Set { |
twisti@1076 | 40 | unknown_m = 0, |
twisti@1076 | 41 | all_features_m = -1, |
duke@435 | 42 | |
twisti@1076 | 43 | v8_instructions_m = 1 << v8_instructions, |
twisti@1076 | 44 | hardware_mul32_m = 1 << hardware_mul32, |
twisti@1076 | 45 | hardware_div32_m = 1 << hardware_div32, |
twisti@1076 | 46 | hardware_fsmuld_m = 1 << hardware_fsmuld, |
twisti@1078 | 47 | hardware_popc_m = 1 << hardware_popc, |
twisti@1076 | 48 | v9_instructions_m = 1 << v9_instructions, |
twisti@1076 | 49 | vis1_instructions_m = 1 << vis1_instructions, |
twisti@1076 | 50 | vis2_instructions_m = 1 << vis2_instructions, |
twisti@1076 | 51 | sun4v_m = 1 << sun4v_instructions, |
duke@435 | 52 | |
twisti@1076 | 53 | generic_v8_m = v8_instructions_m | hardware_mul32_m | hardware_div32_m | hardware_fsmuld_m, |
twisti@1076 | 54 | generic_v9_m = generic_v8_m | v9_instructions_m, |
twisti@1076 | 55 | ultra3_m = generic_v9_m | vis1_instructions_m | vis2_instructions_m, |
duke@435 | 56 | |
duke@435 | 57 | // Temporary until we have something more accurate |
twisti@1076 | 58 | niagara1_unique_m = sun4v_m, |
twisti@1076 | 59 | niagara1_m = generic_v9_m | niagara1_unique_m |
duke@435 | 60 | }; |
duke@435 | 61 | |
duke@435 | 62 | static int _features; |
duke@435 | 63 | static const char* _features_str; |
duke@435 | 64 | |
duke@435 | 65 | static void print_features(); |
duke@435 | 66 | static int determine_features(); |
duke@435 | 67 | static int platform_features(int features); |
duke@435 | 68 | |
twisti@1076 | 69 | static bool is_niagara1(int features) { return (features & sun4v_m) != 0; } |
duke@435 | 70 | |
jmasa@445 | 71 | static int maximum_niagara1_processor_count() { return 32; } |
jmasa@445 | 72 | // Returns true if the platform is in the niagara line and |
jmasa@445 | 73 | // newer than the niagara1. |
jmasa@445 | 74 | static bool is_niagara1_plus(); |
jmasa@445 | 75 | |
duke@435 | 76 | public: |
duke@435 | 77 | // Initialization |
duke@435 | 78 | static void initialize(); |
duke@435 | 79 | |
duke@435 | 80 | // Instruction support |
duke@435 | 81 | static bool has_v8() { return (_features & v8_instructions_m) != 0; } |
duke@435 | 82 | static bool has_v9() { return (_features & v9_instructions_m) != 0; } |
twisti@1076 | 83 | static bool has_hardware_mul32() { return (_features & hardware_mul32_m) != 0; } |
twisti@1076 | 84 | static bool has_hardware_div32() { return (_features & hardware_div32_m) != 0; } |
duke@435 | 85 | static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; } |
twisti@1078 | 86 | static bool has_hardware_popc() { return (_features & hardware_popc_m) != 0; } |
duke@435 | 87 | static bool has_vis1() { return (_features & vis1_instructions_m) != 0; } |
duke@435 | 88 | static bool has_vis2() { return (_features & vis2_instructions_m) != 0; } |
duke@435 | 89 | |
duke@435 | 90 | static bool supports_compare_and_exchange() |
duke@435 | 91 | { return has_v9(); } |
duke@435 | 92 | |
duke@435 | 93 | static bool is_ultra3() { return (_features & ultra3_m) == ultra3_m; } |
duke@435 | 94 | static bool is_sun4v() { return (_features & sun4v_m) != 0; } |
duke@435 | 95 | static bool is_niagara1() { return is_niagara1(_features); } |
duke@435 | 96 | |
duke@435 | 97 | static bool has_fast_fxtof() { return has_v9() && !is_ultra3(); } |
duke@435 | 98 | |
duke@435 | 99 | static const char* cpu_features() { return _features_str; } |
duke@435 | 100 | |
duke@435 | 101 | static intx L1_data_cache_line_size() { |
duke@435 | 102 | return 64; // default prefetch block size on sparc |
duke@435 | 103 | } |
duke@435 | 104 | |
duke@435 | 105 | // Prefetch |
duke@435 | 106 | static intx prefetch_copy_interval_in_bytes() { |
duke@435 | 107 | intx interval = PrefetchCopyIntervalInBytes; |
duke@435 | 108 | return interval >= 0 ? interval : (has_v9() ? 512 : 0); |
duke@435 | 109 | } |
duke@435 | 110 | static intx prefetch_scan_interval_in_bytes() { |
duke@435 | 111 | intx interval = PrefetchScanIntervalInBytes; |
duke@435 | 112 | return interval >= 0 ? interval : (has_v9() ? 512 : 0); |
duke@435 | 113 | } |
duke@435 | 114 | static intx prefetch_fields_ahead() { |
duke@435 | 115 | intx count = PrefetchFieldsAhead; |
duke@435 | 116 | return count >= 0 ? count : (is_ultra3() ? 1 : 0); |
duke@435 | 117 | } |
duke@435 | 118 | |
duke@435 | 119 | static intx allocate_prefetch_distance() { |
duke@435 | 120 | // This method should be called before allocate_prefetch_style(). |
duke@435 | 121 | intx count = AllocatePrefetchDistance; |
duke@435 | 122 | if (count < 0) { // default is not defined ? |
duke@435 | 123 | count = 512; |
duke@435 | 124 | } |
duke@435 | 125 | return count; |
duke@435 | 126 | } |
duke@435 | 127 | static intx allocate_prefetch_style() { |
duke@435 | 128 | assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive"); |
duke@435 | 129 | // Return 0 if AllocatePrefetchDistance was not defined. |
duke@435 | 130 | return AllocatePrefetchDistance > 0 ? AllocatePrefetchStyle : 0; |
duke@435 | 131 | } |
duke@435 | 132 | |
duke@435 | 133 | // Legacy |
duke@435 | 134 | static bool v8_instructions_work() { return has_v8() && !has_v9(); } |
duke@435 | 135 | static bool v9_instructions_work() { return has_v9(); } |
duke@435 | 136 | |
duke@435 | 137 | // Assembler testing |
duke@435 | 138 | static void allow_all(); |
duke@435 | 139 | static void revert(); |
duke@435 | 140 | |
duke@435 | 141 | // Override the Abstract_VM_Version implementation. |
duke@435 | 142 | static uint page_size_count() { return is_sun4v() ? 4 : 2; } |
jmasa@445 | 143 | |
jmasa@445 | 144 | // Calculates the number of parallel threads |
jmasa@445 | 145 | static unsigned int calc_parallel_worker_threads(); |
duke@435 | 146 | }; |