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view src/cpu/sparc/vm/vm_version_sparc.cpp @ 2929:44f7447e2f6d
'Iterative' canonicalization
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Thu, 09 Jun 2011 14:20:39 +0200 |
parents | c04052fd6ae1 |
children | faa472957b38 |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "assembler_sparc.inline.hpp" #include "memory/resourceArea.hpp" #include "runtime/java.hpp" #include "runtime/stubCodeGenerator.hpp" #include "vm_version_sparc.hpp" #ifdef TARGET_OS_FAMILY_linux # include "os_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "os_solaris.inline.hpp" #endif int VM_Version::_features = VM_Version::unknown_m; const char* VM_Version::_features_str = ""; void VM_Version::initialize() { _features = determine_features(); PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); PrefetchFieldsAhead = prefetch_fields_ahead(); // Allocation prefetch settings intx cache_line_size = L1_data_cache_line_size(); if( cache_line_size > AllocatePrefetchStepSize ) AllocatePrefetchStepSize = cache_line_size; if( FLAG_IS_DEFAULT(AllocatePrefetchLines) ) AllocatePrefetchLines = 3; // Optimistic value assert( AllocatePrefetchLines > 0, "invalid value"); if( AllocatePrefetchLines < 1 ) // set valid value in product VM AllocatePrefetchLines = 1; // Conservative value AllocatePrefetchDistance = allocate_prefetch_distance(); AllocatePrefetchStyle = allocate_prefetch_style(); assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); UseSSE = 0; // Only on x86 and x64 _supports_cx8 = has_v9(); if (is_niagara()) { // Indirect branch is the same cost as direct if (FLAG_IS_DEFAULT(UseInlineCaches)) { FLAG_SET_DEFAULT(UseInlineCaches, false); } // Align loops on a single instruction boundary. if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { FLAG_SET_DEFAULT(OptoLoopAlignment, 4); } // When using CMS, we cannot use memset() in BOT updates because // the sun4v/CMT version in libc_psr uses BIS which exposes // "phantom zeros" to concurrent readers. See 6948537. if (FLAG_IS_DEFAULT(UseMemSetInBOT) && UseConcMarkSweepGC) { FLAG_SET_DEFAULT(UseMemSetInBOT, false); } #ifdef _LP64 // 32-bit oops don't make sense for the 64-bit VM on sparc // since the 32-bit VM has the same registers and smaller objects. Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); #endif // _LP64 #ifdef COMPILER2 // Indirect branch is the same cost as direct if (FLAG_IS_DEFAULT(UseJumpTables)) { FLAG_SET_DEFAULT(UseJumpTables, true); } // Single-issue, so entry and loop tops are // aligned on a single instruction boundary if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); } if (is_niagara_plus()) { if (has_blk_init() && AllocatePrefetchStyle > 0 && FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { // Use BIS instruction for allocation prefetch. FLAG_SET_DEFAULT(AllocatePrefetchStyle, 3); if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { // Use smaller prefetch distance on N2 with BIS FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); } } if (AllocatePrefetchStyle != 3 && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { // Use different prefetch distance without BIS FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); } } #endif } // Use hardware population count instruction if available. if (has_hardware_popc()) { if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { FLAG_SET_DEFAULT(UsePopCountInstruction, true); } } #ifdef COMPILER2 // Currently not supported anywhere. FLAG_SET_DEFAULT(UseFPUForSpilling, false); #endif char buf[512]; jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", (has_v8() ? ", has_v8" : ""), (has_v9() ? ", has_v9" : ""), (has_hardware_popc() ? ", popc" : ""), (has_vis1() ? ", has_vis1" : ""), (has_vis2() ? ", has_vis2" : ""), (has_vis3() ? ", has_vis3" : ""), (has_blk_init() ? ", has_blk_init" : ""), (is_ultra3() ? ", is_ultra3" : ""), (is_sun4v() ? ", is_sun4v" : ""), (is_niagara() ? ", is_niagara" : ""), (is_niagara_plus() ? ", is_niagara_plus" : ""), (is_sparc64() ? ", is_sparc64" : ""), (!has_hardware_mul32() ? ", no-mul32" : ""), (!has_hardware_div32() ? ", no-div32" : ""), (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); // buf is started with ", " or is empty _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf); #ifndef PRODUCT if (PrintMiscellaneous && Verbose) { tty->print("Allocation: "); if (AllocatePrefetchStyle <= 0) { tty->print_cr("no prefetching"); } else { if (AllocatePrefetchLines > 1) { tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); } else { tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance); } } if (PrefetchCopyIntervalInBytes > 0) { tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); } if (PrefetchScanIntervalInBytes > 0) { tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); } if (PrefetchFieldsAhead > 0) { tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); } } #endif // PRODUCT } void VM_Version::print_features() { tty->print_cr("Version:%s", cpu_features()); } int VM_Version::determine_features() { if (UseV8InstrsOnly) { NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");) return generic_v8_m; } int features = platform_features(unknown_m); // platform_features() is os_arch specific if (features == unknown_m) { features = generic_v9_m; warning("Cannot recognize SPARC version. Default to V9"); } assert(is_T_family(features) == is_niagara(features), "Niagara should be T series"); if (UseNiagaraInstrs) { // Force code generation for Niagara if (is_T_family(features)) { // Happy to accomodate... } else { NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");) features |= T_family_m; } } else { if (is_T_family(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) { NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");) features &= ~(T_family_m | T1_model_m); } else { // Happy to accomodate... } } return features; } static int saved_features = 0; void VM_Version::allow_all() { saved_features = _features; _features = all_features_m; } void VM_Version::revert() { _features = saved_features; } unsigned int VM_Version::calc_parallel_worker_threads() { unsigned int result; if (is_niagara_plus()) { result = nof_parallel_worker_threads(5, 16, 8); } else { result = nof_parallel_worker_threads(5, 8, 8); } return result; }