duke@435: /*
twisti@1076:  * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: # include "incls/_precompiled.incl"
duke@435: # include "incls/_vm_version_sparc.cpp.incl"
duke@435: 
duke@435: int VM_Version::_features = VM_Version::unknown_m;
duke@435: const char* VM_Version::_features_str = "";
duke@435: 
jmasa@445: bool VM_Version::is_niagara1_plus() {
jmasa@445:   // This is a placeholder until the real test is determined.
jmasa@445:   return is_niagara1() &&
jmasa@445:     (os::processor_count() > maximum_niagara1_processor_count());
jmasa@445: }
jmasa@445: 
duke@435: void VM_Version::initialize() {
duke@435:   _features = determine_features();
duke@435:   PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes();
duke@435:   PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes();
duke@435:   PrefetchFieldsAhead         = prefetch_fields_ahead();
duke@435: 
duke@435:   // Allocation prefetch settings
duke@435:   intx cache_line_size = L1_data_cache_line_size();
duke@435:   if( cache_line_size > AllocatePrefetchStepSize )
duke@435:     AllocatePrefetchStepSize = cache_line_size;
duke@435:   if( FLAG_IS_DEFAULT(AllocatePrefetchLines) )
duke@435:     AllocatePrefetchLines = 3; // Optimistic value
duke@435:   assert( AllocatePrefetchLines > 0, "invalid value");
duke@435:   if( AllocatePrefetchLines < 1 ) // set valid value in product VM
duke@435:     AllocatePrefetchLines = 1; // Conservative value
duke@435: 
duke@435:   AllocatePrefetchDistance = allocate_prefetch_distance();
duke@435:   AllocatePrefetchStyle    = allocate_prefetch_style();
duke@435: 
duke@435:   assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value");
duke@435: 
duke@435:   UseSSE = 0; // Only on x86 and x64
duke@435: 
duke@435:   _supports_cx8               = has_v9();
duke@435: 
duke@435:   if (is_niagara1()) {
duke@435:     // Indirect branch is the same cost as direct
duke@435:     if (FLAG_IS_DEFAULT(UseInlineCaches)) {
duke@435:       UseInlineCaches         = false;
duke@435:     }
coleenp@548: #ifdef _LP64
coleenp@548:     // Single issue niagara1 is slower for CompressedOops
coleenp@548:     // but niagaras after that it's fine.
coleenp@548:     if (!is_niagara1_plus()) {
coleenp@548:       if (FLAG_IS_DEFAULT(UseCompressedOops)) {
coleenp@548:         FLAG_SET_ERGO(bool, UseCompressedOops, false);
coleenp@548:       }
coleenp@548:     }
kvn@1077:     // 32-bit oops don't make sense for the 64-bit VM on sparc
kvn@1077:     // since the 32-bit VM has the same registers and smaller objects.
kvn@1077:     Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
coleenp@548: #endif // _LP64
duke@435: #ifdef COMPILER2
duke@435:     // Indirect branch is the same cost as direct
duke@435:     if (FLAG_IS_DEFAULT(UseJumpTables)) {
duke@435:       UseJumpTables           = true;
duke@435:     }
duke@435:     // Single-issue, so entry and loop tops are
duke@435:     // aligned on a single instruction boundary
duke@435:     if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) {
duke@435:       InteriorEntryAlignment  = 4;
duke@435:     }
duke@435:     if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
duke@435:       OptoLoopAlignment       = 4;
duke@435:     }
duke@435: #endif
duke@435:   }
duke@435: 
twisti@1078:   // Use hardware population count instruction if available.
twisti@1078:   if (has_hardware_popc()) {
twisti@1078:     if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
twisti@1078:       UsePopCountInstruction = true;
twisti@1078:     }
twisti@1078:   }
twisti@1078: 
duke@435:   char buf[512];
twisti@1078:   jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s",
duke@435:                (has_v8() ? ", has_v8" : ""),
duke@435:                (has_v9() ? ", has_v9" : ""),
twisti@1078:                (has_hardware_popc() ? ", popc" : ""),
duke@435:                (has_vis1() ? ", has_vis1" : ""),
duke@435:                (has_vis2() ? ", has_vis2" : ""),
duke@435:                (is_ultra3() ? ", is_ultra3" : ""),
duke@435:                (is_sun4v() ? ", is_sun4v" : ""),
duke@435:                (is_niagara1() ? ", is_niagara1" : ""),
twisti@1076:                (is_niagara1_plus() ? ", is_niagara1_plus" : ""),
twisti@1076:                (!has_hardware_mul32() ? ", no-mul32" : ""),
twisti@1076:                (!has_hardware_div32() ? ", no-div32" : ""),
duke@435:                (!has_hardware_fsmuld() ? ", no-fsmuld" : ""));
duke@435: 
duke@435:   // buf is started with ", " or is empty
duke@435:   _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);
duke@435: 
duke@435: #ifndef PRODUCT
duke@435:   if (PrintMiscellaneous && Verbose) {
duke@435:     tty->print("Allocation: ");
duke@435:     if (AllocatePrefetchStyle <= 0) {
duke@435:       tty->print_cr("no prefetching");
duke@435:     } else {
duke@435:       if (AllocatePrefetchLines > 1) {
duke@435:         tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize);
duke@435:       } else {
duke@435:         tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance);
duke@435:       }
duke@435:     }
duke@435:     if (PrefetchCopyIntervalInBytes > 0) {
duke@435:       tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes);
duke@435:     }
duke@435:     if (PrefetchScanIntervalInBytes > 0) {
duke@435:       tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes);
duke@435:     }
duke@435:     if (PrefetchFieldsAhead > 0) {
duke@435:       tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead);
duke@435:     }
duke@435:   }
duke@435: #endif // PRODUCT
duke@435: }
duke@435: 
duke@435: void VM_Version::print_features() {
duke@435:   tty->print_cr("Version:%s", cpu_features());
duke@435: }
duke@435: 
duke@435: int VM_Version::determine_features() {
duke@435:   if (UseV8InstrsOnly) {
duke@435:     NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");)
duke@435:     return generic_v8_m;
duke@435:   }
duke@435: 
duke@435:   int features = platform_features(unknown_m); // platform_features() is os_arch specific
duke@435: 
duke@435:   if (features == unknown_m) {
duke@435:     features = generic_v9_m;
duke@435:     warning("Cannot recognize SPARC version. Default to V9");
duke@435:   }
duke@435: 
duke@435:   if (UseNiagaraInstrs) {
duke@435:     if (is_niagara1(features)) {
duke@435:       // Happy to accomodate...
duke@435:     } else {
duke@435:       NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");)
duke@435:       features = niagara1_m;
duke@435:     }
duke@435:   } else {
duke@435:     if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) {
duke@435:       NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");)
duke@435:       features &= ~niagara1_unique_m;
duke@435:     } else {
duke@435:       // Happy to accomodate...
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   return features;
duke@435: }
duke@435: 
duke@435: static int saved_features = 0;
duke@435: 
duke@435: void VM_Version::allow_all() {
duke@435:   saved_features = _features;
duke@435:   _features      = all_features_m;
duke@435: }
duke@435: 
duke@435: void VM_Version::revert() {
duke@435:   _features = saved_features;
duke@435: }
jmasa@445: 
jmasa@445: unsigned int VM_Version::calc_parallel_worker_threads() {
jmasa@445:   unsigned int result;
jmasa@445:   if (is_niagara1_plus()) {
jmasa@445:     result = nof_parallel_worker_threads(5, 16, 8);
jmasa@445:   } else {
jmasa@445:     result = nof_parallel_worker_threads(5, 8, 8);
jmasa@445:   }
jmasa@445:   return result;
jmasa@445: }