--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/sparc/globals_sparc.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2000, 2017, 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.
+ *
+ */
+
+#ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP
+#define CPU_SPARC_VM_GLOBALS_SPARC_HPP
+
+#include "utilities/globalDefinitions.hpp"
+#include "utilities/macros.hpp"
+
+// Sets the default values for platform dependent flags used by the runtime system.
+// (see globals.hpp)
+
+// For sparc we do not do call backs when a thread is in the interpreter, because the
+// interpreter dispatch needs at least two instructions - first to load the dispatch address
+// in a register, and second to jmp. The swapping of the dispatch table may occur _after_
+// the load of the dispatch address and hence the jmp would still go to the location
+// according to the prior table. So, we let the thread continue and let it block by itself.
+define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second
+define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
+define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this
+
+define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
+define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc.
+define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast
+
+define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
+define_pd_global(intx, CodeEntryAlignment, 32);
+// The default setting 16/16 seems to work best.
+// (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
+define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
+define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
+define_pd_global(intx, InlineSmallCode, 1500);
+
+#define DEFAULT_STACK_YELLOW_PAGES (2)
+#define DEFAULT_STACK_RED_PAGES (1)
+#define DEFAULT_STACK_RESERVED_PAGES (SOLARIS_ONLY(1) NOT_SOLARIS(0))
+
+define_pd_global(intx, CompilerThreadStackSize, 1024);
+define_pd_global(intx, ThreadStackSize, 1024);
+define_pd_global(intx, VMThreadStackSize, 1024);
+#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
+
+#define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
+#define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
+#define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
+#define MIN_STACK_RESERVED_PAGES (0)
+
+define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
+define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
+define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
+define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
+
+define_pd_global(bool, RewriteBytecodes, true);
+define_pd_global(bool, RewriteFrequentPairs, true);
+
+define_pd_global(bool, UseMembar, false);
+
+define_pd_global(bool, PreserveFramePointer, false);
+
+// GC Ergo Flags
+define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread
+
+define_pd_global(uintx, TypeProfileLevel, 111);
+
+define_pd_global(bool, CompactStrings, true);
+
+define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
+
+#define ARCH_FLAGS(develop, \
+ product, \
+ diagnostic, \
+ experimental, \
+ notproduct, \
+ range, \
+ constraint, \
+ writeable) \
+ \
+ product(intx, UseVIS, 99, \
+ "Highest supported VIS instructions set on Sparc") \
+ range(0, 99) \
+ \
+ product(bool, UseCBCond, false, \
+ "Use compare and branch instruction on SPARC") \
+ \
+ product(bool, UseBlockZeroing, false, \
+ "Use special cpu instructions for block zeroing") \
+ \
+ product(intx, BlockZeroingLowLimit, 2048, \
+ "Minimum size in bytes when block zeroing will be used") \
+ range(1, max_jint) \
+ \
+ product(bool, UseBlockCopy, false, \
+ "Use special cpu instructions for block copy") \
+ \
+ product(intx, BlockCopyLowLimit, 2048, \
+ "Minimum size in bytes when block copy will be used") \
+ range(1, max_jint) \
+ \
+ product(bool, UseNiagaraInstrs, false, \
+ "Use Niagara-efficient instruction subset") \
+ \
+ develop(bool, UseCASForSwap, false, \
+ "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
+ \
+ product(uintx, ArraycopySrcPrefetchDistance, 0, \
+ "Distance to prefetch source array in arraycopy") \
+ constraint(ArraycopySrcPrefetchDistanceConstraintFunc, AfterErgo) \
+ \
+ product(uintx, ArraycopyDstPrefetchDistance, 0, \
+ "Distance to prefetch destination array in arraycopy") \
+ constraint(ArraycopyDstPrefetchDistanceConstraintFunc, AfterErgo) \
+
+#endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP