Mercurial > hg > truffle
view src/cpu/sparc/vm/vm_version_sparc.cpp @ 5860:32a7714ac0c5
Canonicalize at least once in IterativeCheckCastElimination
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 19 Jul 2012 00:56:40 +0200 |
parents | e3b0dcc327b9 |
children | 8c92982cbbc4 |
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/* * Copyright (c) 1997, 2011, 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(); assert(0 <= AllocatePrefetchInstr && AllocatePrefetchInstr <= 1, "invalid value"); if( AllocatePrefetchInstr < 0 ) AllocatePrefetchInstr = 0; if( AllocatePrefetchInstr > 1 ) AllocatePrefetchInstr = 0; // Allocation prefetch settings intx cache_line_size = prefetch_data_size(); if( cache_line_size > AllocatePrefetchStepSize ) AllocatePrefetchStepSize = cache_line_size; assert(AllocatePrefetchLines > 0, "invalid value"); if( AllocatePrefetchLines < 1 ) // set valid value in product VM AllocatePrefetchLines = 3; assert(AllocateInstancePrefetchLines > 0, "invalid value"); if( AllocateInstancePrefetchLines < 1 ) // set valid value in product VM AllocateInstancePrefetchLines = 1; AllocatePrefetchDistance = allocate_prefetch_distance(); AllocatePrefetchStyle = allocate_prefetch_style(); assert((AllocatePrefetchDistance % AllocatePrefetchStepSize) == 0 && (AllocatePrefetchDistance > 0), "invalid value"); if ((AllocatePrefetchDistance % AllocatePrefetchStepSize) != 0 || (AllocatePrefetchDistance <= 0)) { AllocatePrefetchDistance = AllocatePrefetchStepSize; } if (AllocatePrefetchStyle == 3 && !has_blk_init()) { warning("BIS instructions are not available on this CPU"); FLAG_SET_DEFAULT(AllocatePrefetchStyle, 1); } if (has_v9()) { assert(ArraycopySrcPrefetchDistance < 4096, "invalid value"); if (ArraycopySrcPrefetchDistance >= 4096) ArraycopySrcPrefetchDistance = 4064; assert(ArraycopyDstPrefetchDistance < 4096, "invalid value"); if (ArraycopyDstPrefetchDistance >= 4096) ArraycopyDstPrefetchDistance = 4064; } else { if (ArraycopySrcPrefetchDistance > 0) { warning("prefetch instructions are not available on this CPU"); FLAG_SET_DEFAULT(ArraycopySrcPrefetchDistance, 0); } if (ArraycopyDstPrefetchDistance > 0) { warning("prefetch instructions are not available on this CPU"); FLAG_SET_DEFAULT(ArraycopyDstPrefetchDistance, 0); } } 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() && UseTLAB && FLAG_IS_DEFAULT(AllocatePrefetchInstr)) { // Use BIS instruction for TLAB allocation prefetch. FLAG_SET_ERGO(intx, AllocatePrefetchInstr, 1); if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { FLAG_SET_ERGO(intx, AllocatePrefetchStyle, 3); } if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { // Use smaller prefetch distance with BIS FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); } } if (is_T4()) { // Double number of prefetched cache lines on T4 // since L2 cache line size is smaller (32 bytes). if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) { FLAG_SET_ERGO(intx, AllocatePrefetchLines, AllocatePrefetchLines*2); } if (FLAG_IS_DEFAULT(AllocateInstancePrefetchLines)) { FLAG_SET_ERGO(intx, AllocateInstancePrefetchLines, AllocateInstancePrefetchLines*2); } } if (AllocatePrefetchStyle != 3 && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { // Use different prefetch distance without BIS FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); } if (AllocatePrefetchInstr == 1) { // Need a space at the end of TLAB for BIS since it // will fault when accessing memory outside of heap. // +1 for rounding up to next cache line, +1 to be safe int lines = AllocatePrefetchLines + 2; int step_size = AllocatePrefetchStepSize; int distance = AllocatePrefetchDistance; _reserve_for_allocation_prefetch = (distance + step_size*lines)/(int)HeapWordSize; } } #endif } // Use hardware population count instruction if available. if (has_hardware_popc()) { if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { FLAG_SET_DEFAULT(UsePopCountInstruction, true); } } else if (UsePopCountInstruction) { warning("POPC instruction is not available on this CPU"); FLAG_SET_DEFAULT(UsePopCountInstruction, false); } // T4 and newer Sparc cpus have new compare and branch instruction. if (has_cbcond()) { if (FLAG_IS_DEFAULT(UseCBCond)) { FLAG_SET_DEFAULT(UseCBCond, true); } } else if (UseCBCond) { warning("CBCOND instruction is not available on this CPU"); FLAG_SET_DEFAULT(UseCBCond, false); } assert(BlockZeroingLowLimit > 0, "invalid value"); if (has_block_zeroing()) { if (FLAG_IS_DEFAULT(UseBlockZeroing)) { FLAG_SET_DEFAULT(UseBlockZeroing, true); } } else if (UseBlockZeroing) { warning("BIS zeroing instructions are not available on this CPU"); FLAG_SET_DEFAULT(UseBlockZeroing, false); } assert(BlockCopyLowLimit > 0, "invalid value"); if (has_block_zeroing()) { // has_blk_init() && is_T4(): core's local L2 cache if (FLAG_IS_DEFAULT(UseBlockCopy)) { FLAG_SET_DEFAULT(UseBlockCopy, true); } } else if (UseBlockCopy) { warning("BIS instructions are not available or expensive on this CPU"); FLAG_SET_DEFAULT(UseBlockCopy, false); } #ifdef COMPILER2 // T4 and newer Sparc cpus have fast RDPC. if (has_fast_rdpc() && FLAG_IS_DEFAULT(UseRDPCForConstantTableBase)) { FLAG_SET_DEFAULT(UseRDPCForConstantTableBase, true); } // Currently not supported anywhere. FLAG_SET_DEFAULT(UseFPUForSpilling, false); assert((InteriorEntryAlignment % relocInfo::addr_unit()) == 0, "alignment is not a multiple of NOP size"); #endif assert((CodeEntryAlignment % relocInfo::addr_unit()) == 0, "alignment is not a multiple of NOP size"); assert((OptoLoopAlignment % relocInfo::addr_unit()) == 0, "alignment is not a multiple of NOP size"); char buf[512]; jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s%s%s", (has_v9() ? ", v9" : (has_v8() ? ", v8" : "")), (has_hardware_popc() ? ", popc" : ""), (has_vis1() ? ", vis1" : ""), (has_vis2() ? ", vis2" : ""), (has_vis3() ? ", vis3" : ""), (has_blk_init() ? ", blk_init" : ""), (has_cbcond() ? ", cbcond" : ""), (is_ultra3() ? ", ultra3" : ""), (is_sun4v() ? ", sun4v" : ""), (is_niagara_plus() ? ", niagara_plus" : (is_niagara() ? ", niagara" : "")), (is_sparc64() ? ", 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); // UseVIS is set to the smallest of what hardware supports and what // the command line requires. I.e., you cannot set UseVIS to 3 on // older UltraSparc which do not support it. if (UseVIS > 3) UseVIS=3; if (UseVIS < 0) UseVIS=0; if (!has_vis3()) // Drop to 2 if no VIS3 support UseVIS = MIN2((intx)2,UseVIS); if (!has_vis2()) // Drop to 1 if no VIS2 support UseVIS = MIN2((intx)1,UseVIS); if (!has_vis1()) // Drop to 0 if no VIS1 support UseVIS = 0; #ifndef PRODUCT if (PrintMiscellaneous && Verbose) { tty->print("Allocation"); if (AllocatePrefetchStyle <= 0) { tty->print_cr(": no prefetching"); } else { tty->print(" prefetching: "); if (AllocatePrefetchInstr == 0) { tty->print("PREFETCH"); } else if (AllocatePrefetchInstr == 1) { tty->print("BIS"); } if (AllocatePrefetchLines > 1) { tty->print_cr(" at distance %d, %d lines of %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); } else { tty->print_cr(" at distance %d, one line of %d bytes", AllocatePrefetchDistance, AllocatePrefetchStepSize); } } 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; }