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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
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 # include "incls/_precompiled.incl"
26 # include "incls/_vm_version_sparc.cpp.incl"
27
28 int VM_Version::_features = VM_Version::unknown_m;
29 const char* VM_Version::_features_str = "";
30
31 void VM_Version::initialize() {
32 _features = determine_features();
33 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes();
34 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes();
35 PrefetchFieldsAhead = prefetch_fields_ahead();
36
37 // Allocation prefetch settings
38 intx cache_line_size = L1_data_cache_line_size();
39 if( cache_line_size > AllocatePrefetchStepSize )
40 AllocatePrefetchStepSize = cache_line_size;
41 if( FLAG_IS_DEFAULT(AllocatePrefetchLines) )
42 AllocatePrefetchLines = 3; // Optimistic value
43 assert( AllocatePrefetchLines > 0, "invalid value");
44 if( AllocatePrefetchLines < 1 ) // set valid value in product VM
45 AllocatePrefetchLines = 1; // Conservative value
46
47 AllocatePrefetchDistance = allocate_prefetch_distance();
48 AllocatePrefetchStyle = allocate_prefetch_style();
49
50 assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value");
51
52 UseSSE = 0; // Only on x86 and x64
53
54 _supports_cx8 = has_v9();
55
56 if (is_niagara1()) {
57 // Indirect branch is the same cost as direct
58 if (FLAG_IS_DEFAULT(UseInlineCaches)) {
59 UseInlineCaches = false;
60 }
61 #ifdef COMPILER2
62 // Indirect branch is the same cost as direct
63 if (FLAG_IS_DEFAULT(UseJumpTables)) {
64 UseJumpTables = true;
65 }
66 // Single-issue, so entry and loop tops are
67 // aligned on a single instruction boundary
68 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) {
69 InteriorEntryAlignment = 4;
70 }
71 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
72 OptoLoopAlignment = 4;
73 }
74 #endif
75 }
76
77 char buf[512];
78 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
79 (has_v8() ? ", has_v8" : ""),
80 (has_v9() ? ", has_v9" : ""),
81 (has_vis1() ? ", has_vis1" : ""),
82 (has_vis2() ? ", has_vis2" : ""),
83 (is_ultra3() ? ", is_ultra3" : ""),
84 (is_sun4v() ? ", is_sun4v" : ""),
85 (is_niagara1() ? ", is_niagara1" : ""),
86 (!has_hardware_int_muldiv() ? ", no-muldiv" : ""),
87 (!has_hardware_fsmuld() ? ", no-fsmuld" : ""));
88
89 // buf is started with ", " or is empty
90 _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);
91
92 #ifndef PRODUCT
93 if (PrintMiscellaneous && Verbose) {
94 tty->print("Allocation: ");
95 if (AllocatePrefetchStyle <= 0) {
96 tty->print_cr("no prefetching");
97 } else {
98 if (AllocatePrefetchLines > 1) {
99 tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize);
100 } else {
101 tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance);
102 }
103 }
104 if (PrefetchCopyIntervalInBytes > 0) {
105 tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes);
106 }
107 if (PrefetchScanIntervalInBytes > 0) {
108 tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes);
109 }
110 if (PrefetchFieldsAhead > 0) {
111 tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead);
112 }
113 }
114 #endif // PRODUCT
115 }
116
117 void VM_Version::print_features() {
118 tty->print_cr("Version:%s", cpu_features());
119 }
120
121 int VM_Version::determine_features() {
122 if (UseV8InstrsOnly) {
123 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");)
124 return generic_v8_m;
125 }
126
127 int features = platform_features(unknown_m); // platform_features() is os_arch specific
128
129 if (features == unknown_m) {
130 features = generic_v9_m;
131 warning("Cannot recognize SPARC version. Default to V9");
132 }
133
134 if (UseNiagaraInstrs) {
135 if (is_niagara1(features)) {
136 // Happy to accomodate...
137 } else {
138 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");)
139 features = niagara1_m;
140 }
141 } else {
142 if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) {
143 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");)
144 features &= ~niagara1_unique_m;
145 } else {
146 // Happy to accomodate...
147 }
148 }
149
150 return features;
151 }
152
153 static int saved_features = 0;
154
155 void VM_Version::allow_all() {
156 saved_features = _features;
157 _features = all_features_m;
158 }
159
160 void VM_Version::revert() {
161 _features = saved_features;
162 }