--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cpu/ppc/vm/compiledIC_ppc.cpp	Fri Aug 02 16:46:45 2013 +0200
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 1997, 2013, 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 "asm/macroAssembler.inline.hpp"
+#include "code/compiledIC.hpp"
+#include "code/icBuffer.hpp"
+#include "code/nmethod.hpp"
+#include "memory/resourceArea.hpp"
+#include "runtime/mutexLocker.hpp"
+#include "runtime/safepoint.hpp"
+#ifdef COMPILER2
+#include "opto/matcher.hpp"
+#endif
+
+// Release the CompiledICHolder* associated with this call site is there is one.
+void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
+  // This call site might have become stale so inspect it carefully.
+  NativeCall* call = nativeCall_at(call_site->addr());
+  if (is_icholder_entry(call->destination())) {
+    NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
+    InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
+  }
+}
+
+bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
+  // This call site might have become stale so inspect it carefully.
+  NativeCall* call = nativeCall_at(call_site->addr());
+  return is_icholder_entry(call->destination());
+}
+
+//-----------------------------------------------------------------------------
+// High-level access to an inline cache. Guaranteed to be MT-safe.
+
+CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)
+  : _ic_call(call)
+{
+  address ic_call = call->instruction_address();
+
+  assert(ic_call != NULL, "ic_call address must be set");
+  assert(nm != NULL, "must pass nmethod");
+  assert(nm->contains(ic_call), "must be in nmethod");
+
+  // Search for the ic_call at the given address.
+  RelocIterator iter(nm, ic_call, ic_call+1);
+  bool ret = iter.next();
+  assert(ret == true, "relocInfo must exist at this address");
+  assert(iter.addr() == ic_call, "must find ic_call");
+  if (iter.type() == relocInfo::virtual_call_type) {
+    virtual_call_Relocation* r = iter.virtual_call_reloc();
+    _is_optimized = false;
+    _value = nativeMovConstReg_at(r->cached_value());
+  } else {
+    assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call");
+    _is_optimized = true;
+    _value = NULL;
+  }
+}
+
+// ----------------------------------------------------------------------------
+
+// A PPC CompiledStaticCall looks like this:
+//
+// >>>> consts
+//
+// [call target1]
+// [IC cache]
+// [call target2]
+//
+// <<<< consts
+// >>>> insts
+//
+// bl offset16               -+  -+             ??? // How many bits available?
+//                            |   |
+// <<<< insts                 |   |
+// >>>> stubs                 |   |
+//                            |   |- trampoline_stub_Reloc
+// trampoline stub:           | <-+
+//   r2 = toc                 |
+//   r2 = [r2 + offset]       |       // Load call target1 from const section
+//   mtctr r2                 |
+//   bctr                     |- static_stub_Reloc
+// comp_to_interp_stub:   <---+
+//   r1 = toc
+//   ICreg = [r1 + IC_offset]         // Load IC from const section
+//   r1    = [r1 + offset]            // Load call target2 from const section
+//   mtctr r1
+//   bctr
+//
+// <<<< stubs
+//
+// The call instruction in the code either
+// - branches directly to a compiled method if offset encodable in instruction
+// - branches to the trampoline stub if offset to compiled method not encodable
+// - branches to the compiled_to_interp stub if target interpreted
+//
+// Further there are three relocations from the loads to the constants in
+// the constant section.
+//
+// Usage of r1 and r2 in the stubs allows to distinguish them.
+
+const int IC_pos_in_java_to_interp_stub = 8;
+#define __ _masm.
+void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
+#ifdef COMPILER2
+  // Get the mark within main instrs section which is set to the address of the call.
+  address call_addr = cbuf.insts_mark();
+
+  // Note that the code buffer's insts_mark is always relative to insts.
+  // That's why we must use the macroassembler to generate a stub.
+  MacroAssembler _masm(&cbuf);
+
+  // Start the stub.
+  address stub = __ start_a_stub(CompiledStaticCall::to_interp_stub_size());
+  if (stub == NULL) {
+    Compile::current()->env()->record_out_of_memory_failure();
+    return;
+  }
+
+  // For java_to_interp stubs we use R11_scratch1 as scratch register
+  // and in call trampoline stubs we use R12_scratch2. This way we
+  // can distinguish them (see is_NativeCallTrampolineStub_at()).
+  Register reg_scratch = R11_scratch1;
+
+  // Create a static stub relocation which relates this stub
+  // with the call instruction at insts_call_instruction_offset in the
+  // instructions code-section.
+  __ relocate(static_stub_Relocation::spec(call_addr));
+  const int stub_start_offset = __ offset();
+
+  // Now, create the stub's code:
+  // - load the TOC
+  // - load the inline cache oop from the constant pool
+  // - load the call target from the constant pool
+  // - call
+  __ calculate_address_from_global_toc(reg_scratch, __ method_toc());
+  AddressLiteral ic = __ allocate_metadata_address((Metadata *)NULL);
+  __ load_const_from_method_toc(as_Register(Matcher::inline_cache_reg_encode()), ic, reg_scratch);
+
+  if (ReoptimizeCallSequences) {
+    __ b64_patchable((address)-1, relocInfo::none);
+  } else {
+    AddressLiteral a((address)-1);
+    __ load_const_from_method_toc(reg_scratch, a, reg_scratch);
+    __ mtctr(reg_scratch);
+    __ bctr();
+  }
+
+  // FIXME: Assert that the stub can be identified and patched.
+
+  // Java_to_interp_stub_size should be good.
+  assert((__ offset() - stub_start_offset) <= CompiledStaticCall::to_interp_stub_size(),
+         "should be good size");
+  assert(!is_NativeCallTrampolineStub_at(__ addr_at(stub_start_offset)),
+         "must not confuse java_to_interp with trampoline stubs");
+
+ // End the stub.
+  __ end_a_stub();
+#else
+  ShouldNotReachHere();
+#endif
+}
+#undef __
+
+// Size of java_to_interp stub, this doesn't need to be accurate but it must
+// be larger or equal to the real size of the stub.
+// Used for optimization in Compile::Shorten_branches.
+int CompiledStaticCall::to_interp_stub_size() {
+  return 12 * BytesPerInstWord;
+}
+
+// Relocation entries for call stub, compiled java to interpreter.
+// Used for optimization in Compile::Shorten_branches.
+int CompiledStaticCall::reloc_to_interp_stub() {
+  return 5;
+}
+
+void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
+  address stub = find_stub();
+  guarantee(stub != NULL, "stub not found");
+
+  if (TraceICs) {
+    ResourceMark rm;
+    tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
+                  instruction_address(),
+                  callee->name_and_sig_as_C_string());
+  }
+
+  // Creation also verifies the object.
+  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub + IC_pos_in_java_to_interp_stub);
+  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
+
+  assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
+         "a) MT-unsafe modification of inline cache");
+  assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
+         "b) MT-unsafe modification of inline cache");
+
+  // Update stub.
+  method_holder->set_data((intptr_t)callee());
+  jump->set_jump_destination(entry);
+
+  // Update jump to call.
+  set_destination_mt_safe(stub);
+}
+
+void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
+  assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
+  // Reset stub.
+  address stub = static_stub->addr();
+  assert(stub != NULL, "stub not found");
+  // Creation also verifies the object.
+  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub + IC_pos_in_java_to_interp_stub);
+  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
+  method_holder->set_data(0);
+  jump->set_jump_destination((address)-1);
+}
+
+//-----------------------------------------------------------------------------
+// Non-product mode code
+#ifndef PRODUCT
+
+void CompiledStaticCall::verify() {
+  // Verify call.
+  NativeCall::verify();
+  if (os::is_MP()) {
+    verify_alignment();
+  }
+
+  // Verify stub.
+  address stub = find_stub();
+  assert(stub != NULL, "no stub found for static call");
+  // Creation also verifies the object.
+  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub + IC_pos_in_java_to_interp_stub);
+  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
+
+  // Verify state.
+  assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
+}
+
+#endif // !PRODUCT