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/*
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* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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# include "incls/_precompiled.incl"
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# include "incls/_vm_version_sparc.cpp.incl"
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int VM_Version::_features = VM_Version::unknown_m;
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const char* VM_Version::_features_str = "";
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void VM_Version::initialize() {
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_features = determine_features();
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PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes();
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PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes();
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PrefetchFieldsAhead = prefetch_fields_ahead();
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// Allocation prefetch settings
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intx cache_line_size = L1_data_cache_line_size();
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if( cache_line_size > AllocatePrefetchStepSize )
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AllocatePrefetchStepSize = cache_line_size;
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if( FLAG_IS_DEFAULT(AllocatePrefetchLines) )
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AllocatePrefetchLines = 3; // Optimistic value
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assert( AllocatePrefetchLines > 0, "invalid value");
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if( AllocatePrefetchLines < 1 ) // set valid value in product VM
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AllocatePrefetchLines = 1; // Conservative value
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AllocatePrefetchDistance = allocate_prefetch_distance();
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AllocatePrefetchStyle = allocate_prefetch_style();
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assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value");
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UseSSE = 0; // Only on x86 and x64
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_supports_cx8 = has_v9();
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if (is_niagara1()) {
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// Indirect branch is the same cost as direct
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if (FLAG_IS_DEFAULT(UseInlineCaches)) {
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UseInlineCaches = false;
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}
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#ifdef COMPILER2
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// Indirect branch is the same cost as direct
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if (FLAG_IS_DEFAULT(UseJumpTables)) {
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UseJumpTables = true;
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}
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// Single-issue, so entry and loop tops are
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// aligned on a single instruction boundary
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if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) {
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InteriorEntryAlignment = 4;
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}
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if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
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OptoLoopAlignment = 4;
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}
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#endif
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}
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char buf[512];
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jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
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(has_v8() ? ", has_v8" : ""),
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(has_v9() ? ", has_v9" : ""),
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(has_vis1() ? ", has_vis1" : ""),
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(has_vis2() ? ", has_vis2" : ""),
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(is_ultra3() ? ", is_ultra3" : ""),
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(is_sun4v() ? ", is_sun4v" : ""),
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(is_niagara1() ? ", is_niagara1" : ""),
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(!has_hardware_int_muldiv() ? ", no-muldiv" : ""),
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(!has_hardware_fsmuld() ? ", no-fsmuld" : ""));
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// buf is started with ", " or is empty
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_features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);
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#ifndef PRODUCT
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if (PrintMiscellaneous && Verbose) {
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tty->print("Allocation: ");
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if (AllocatePrefetchStyle <= 0) {
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tty->print_cr("no prefetching");
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} else {
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if (AllocatePrefetchLines > 1) {
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tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize);
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} else {
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tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance);
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}
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}
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if (PrefetchCopyIntervalInBytes > 0) {
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tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes);
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}
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if (PrefetchScanIntervalInBytes > 0) {
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tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes);
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}
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if (PrefetchFieldsAhead > 0) {
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tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead);
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}
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}
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#endif // PRODUCT
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}
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void VM_Version::print_features() {
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tty->print_cr("Version:%s", cpu_features());
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}
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int VM_Version::determine_features() {
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if (UseV8InstrsOnly) {
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NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");)
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return generic_v8_m;
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}
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int features = platform_features(unknown_m); // platform_features() is os_arch specific
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if (features == unknown_m) {
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features = generic_v9_m;
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warning("Cannot recognize SPARC version. Default to V9");
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}
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if (UseNiagaraInstrs) {
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if (is_niagara1(features)) {
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// Happy to accomodate...
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} else {
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NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");)
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features = niagara1_m;
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}
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} else {
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if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) {
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NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");)
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features &= ~niagara1_unique_m;
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} else {
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// Happy to accomodate...
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}
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}
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return features;
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}
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static int saved_features = 0;
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void VM_Version::allow_all() {
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saved_features = _features;
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_features = all_features_m;
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}
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void VM_Version::revert() {
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_features = saved_features;
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}
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