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comparison src/cpu/sparc/vm/vm_version_sparc.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 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 {
28 v8_instructions = 0,
29 hardware_int_muldiv = 1,
30 hardware_fsmuld = 2,
31 v9_instructions = 3,
32 vis1_instructions = 4,
33 vis2_instructions = 5,
34 sun4v_instructions = 6
35 };
36
37 enum Feature_Flag_Set {
38 unknown_m = 0,
39 all_features_m = -1,
40
41 v8_instructions_m = 1 << v8_instructions,
42 hardware_int_muldiv_m = 1 << hardware_int_muldiv,
43 hardware_fsmuld_m = 1 << hardware_fsmuld,
44 v9_instructions_m = 1 << v9_instructions,
45 vis1_instructions_m = 1 << vis1_instructions,
46 vis2_instructions_m = 1 << vis2_instructions,
47 sun4v_m = 1 << sun4v_instructions,
48
49 generic_v8_m = v8_instructions_m | hardware_int_muldiv_m | hardware_fsmuld_m,
50 generic_v9_m = generic_v8_m | v9_instructions_m | vis1_instructions_m,
51 ultra3_m = generic_v9_m | vis2_instructions_m,
52
53 // Temporary until we have something more accurate
54 niagara1_unique_m = sun4v_m,
55 niagara1_m = generic_v9_m | niagara1_unique_m
56 };
57
58 static int _features;
59 static const char* _features_str;
60
61 static void print_features();
62 static int determine_features();
63 static int platform_features(int features);
64
65 static bool is_niagara1(int features) { return (features & niagara1_m) == niagara1_m; }
66
67 public:
68 // Initialization
69 static void initialize();
70
71 // Instruction support
72 static bool has_v8() { return (_features & v8_instructions_m) != 0; }
73 static bool has_v9() { return (_features & v9_instructions_m) != 0; }
74 static bool has_hardware_int_muldiv() { return (_features & hardware_int_muldiv_m) != 0; }
75 static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; }
76 static bool has_vis1() { return (_features & vis1_instructions_m) != 0; }
77 static bool has_vis2() { return (_features & vis2_instructions_m) != 0; }
78
79 static bool supports_compare_and_exchange()
80 { return has_v9(); }
81
82 static bool is_ultra3() { return (_features & ultra3_m) == ultra3_m; }
83 static bool is_sun4v() { return (_features & sun4v_m) != 0; }
84 static bool is_niagara1() { return is_niagara1(_features); }
85
86 static bool has_fast_fxtof() { return has_v9() && !is_ultra3(); }
87
88 static const char* cpu_features() { return _features_str; }
89
90 static intx L1_data_cache_line_size() {
91 return 64; // default prefetch block size on sparc
92 }
93
94 // Prefetch
95 static intx prefetch_copy_interval_in_bytes() {
96 intx interval = PrefetchCopyIntervalInBytes;
97 return interval >= 0 ? interval : (has_v9() ? 512 : 0);
98 }
99 static intx prefetch_scan_interval_in_bytes() {
100 intx interval = PrefetchScanIntervalInBytes;
101 return interval >= 0 ? interval : (has_v9() ? 512 : 0);
102 }
103 static intx prefetch_fields_ahead() {
104 intx count = PrefetchFieldsAhead;
105 return count >= 0 ? count : (is_ultra3() ? 1 : 0);
106 }
107
108 static intx allocate_prefetch_distance() {
109 // This method should be called before allocate_prefetch_style().
110 intx count = AllocatePrefetchDistance;
111 if (count < 0) { // default is not defined ?
112 count = 512;
113 }
114 return count;
115 }
116 static intx allocate_prefetch_style() {
117 assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive");
118 // Return 0 if AllocatePrefetchDistance was not defined.
119 return AllocatePrefetchDistance > 0 ? AllocatePrefetchStyle : 0;
120 }
121
122 // Legacy
123 static bool v8_instructions_work() { return has_v8() && !has_v9(); }
124 static bool v9_instructions_work() { return has_v9(); }
125
126 // Assembler testing
127 static void allow_all();
128 static void revert();
129
130 // Override the Abstract_VM_Version implementation.
131 static uint page_size_count() { return is_sun4v() ? 4 : 2; }
132 };