Mercurial > hg > truffle
annotate src/cpu/sparc/vm/vm_version_sparc.hpp @ 643:c771b7f43bbf
6378821: bitCount() should use POPC on SPARC processors and AMD+10h
Summary: bitCount() should use POPC on SPARC processors where POPC is implemented directly in hardware.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Fri, 13 Mar 2009 11:35:17 -0700 |
| parents | 6af0a709d52b |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 class VM_Version: public Abstract_VM_Version { | |
| 26 protected: | |
| 27 enum Feature_Flag { | |
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28 v8_instructions = 0, |
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29 hardware_mul32 = 1, |
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30 hardware_div32 = 2, |
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31 hardware_fsmuld = 3, |
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32 hardware_popc = 4, |
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33 v9_instructions = 5, |
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34 vis1_instructions = 6, |
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35 vis2_instructions = 7, |
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36 sun4v_instructions = 8 |
| 0 | 37 }; |
| 38 | |
| 39 enum Feature_Flag_Set { | |
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40 unknown_m = 0, |
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41 all_features_m = -1, |
| 0 | 42 |
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43 v8_instructions_m = 1 << v8_instructions, |
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44 hardware_mul32_m = 1 << hardware_mul32, |
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45 hardware_div32_m = 1 << hardware_div32, |
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46 hardware_fsmuld_m = 1 << hardware_fsmuld, |
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47 hardware_popc_m = 1 << hardware_popc, |
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48 v9_instructions_m = 1 << v9_instructions, |
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49 vis1_instructions_m = 1 << vis1_instructions, |
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50 vis2_instructions_m = 1 << vis2_instructions, |
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51 sun4v_m = 1 << sun4v_instructions, |
| 0 | 52 |
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53 generic_v8_m = v8_instructions_m | hardware_mul32_m | hardware_div32_m | hardware_fsmuld_m, |
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54 generic_v9_m = generic_v8_m | v9_instructions_m, |
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55 ultra3_m = generic_v9_m | vis1_instructions_m | vis2_instructions_m, |
| 0 | 56 |
| 57 // Temporary until we have something more accurate | |
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58 niagara1_unique_m = sun4v_m, |
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59 niagara1_m = generic_v9_m | niagara1_unique_m |
| 0 | 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 | |
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69 static bool is_niagara1(int features) { return (features & sun4v_m) != 0; } |
| 0 | 70 |
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71 static int maximum_niagara1_processor_count() { return 32; } |
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72 // Returns true if the platform is in the niagara line and |
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73 // newer than the niagara1. |
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74 static bool is_niagara1_plus(); |
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75 |
| 0 | 76 public: |
| 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; } | |
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83 static bool has_hardware_mul32() { return (_features & hardware_mul32_m) != 0; } |
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84 static bool has_hardware_div32() { return (_features & hardware_div32_m) != 0; } |
| 0 | 85 static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; } |
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86 static bool has_hardware_popc() { return (_features & hardware_popc_m) != 0; } |
| 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; } | |
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143 |
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144 // Calculates the number of parallel threads |
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145 static unsigned int calc_parallel_worker_threads(); |
| 0 | 146 }; |