--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cpu/ppc/vm/vtableStubs_ppc_64.cpp	Fri Aug 02 16:46:45 2013 +0200
@@ -0,0 +1,269 @@
+/*
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2012, 2013 SAP AG. 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/assembler.hpp"
+#include "asm/macroAssembler.inline.hpp"
+#include "code/vtableStubs.hpp"
+#include "interp_masm_ppc_64.hpp"
+#include "memory/resourceArea.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/klassVtable.hpp"
+#include "runtime/sharedRuntime.hpp"
+#include "vmreg_ppc.inline.hpp"
+#ifdef COMPILER2
+#include "opto/runtime.hpp"
+#endif
+
+#define __ masm->
+
+#ifdef PRODUCT
+#define BLOCK_COMMENT(str) // nothing
+#else
+#define BLOCK_COMMENT(str) __ block_comment(str)
+#endif
+#define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
+
+#ifndef PRODUCT
+extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index);
+#endif
+
+// Used by compiler only; may use only caller saved, non-argument
+// registers.
+VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
+  // PPC port: use fixed size.
+  const int code_length = VtableStub::pd_code_size_limit(true);
+  VtableStub* s = new (code_length) VtableStub(true, vtable_index);
+  ResourceMark rm;
+  CodeBuffer cb(s->entry_point(), code_length);
+  MacroAssembler* masm = new MacroAssembler(&cb);
+  address start_pc;
+
+#ifndef PRODUCT
+  if (CountCompiledCalls) {
+    __ load_const(R11_scratch1, SharedRuntime::nof_megamorphic_calls_addr());
+    __ lwz(R12_scratch2, 0, R11_scratch1);
+    __ addi(R12_scratch2, R12_scratch2, 1);
+    __ stw(R12_scratch2, 0, R11_scratch1);
+  }
+#endif
+
+  assert(VtableStub::receiver_location() == R3_ARG1->as_VMReg(), "receiver expected in R3_ARG1");
+
+  // Get receiver klass.
+  const Register rcvr_klass = R11_scratch1;
+
+  // We might implicit NULL fault here.
+  address npe_addr = __ pc(); // npe = null pointer exception
+  __ load_klass_with_trap_null_check(rcvr_klass, R3);
+
+ // Set methodOop (in case of interpreted method), and destination address.
+  int entry_offset = InstanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size();
+
+#ifndef PRODUCT
+  if (DebugVtables) {
+    Label L;
+    // Check offset vs vtable length.
+    const Register vtable_len = R12_scratch2;
+    __ lwz(vtable_len, InstanceKlass::vtable_length_offset()*wordSize, rcvr_klass);
+    __ cmpwi(CCR0, vtable_len, vtable_index*vtableEntry::size());
+    __ bge(CCR0, L);
+    __ li(R12_scratch2, vtable_index);
+    __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), R3_ARG1, R12_scratch2, false);
+    __ bind(L);
+  }
+#endif
+
+  int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes();
+
+  __ ld(R19_method, v_off, rcvr_klass);
+
+#ifndef PRODUCT
+  if (DebugVtables) {
+    Label L;
+    __ cmpdi(CCR0, R19_method, 0);
+    __ bne(CCR0, L);
+    __ stop("Vtable entry is ZERO", 102);
+    __ bind(L);
+  }
+#endif
+
+  // If the vtable entry is null, the method is abstract.
+  address ame_addr = __ pc(); // ame = abstract method error
+
+  __ ld_with_trap_null_check(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method);
+  __ mtctr(R12_scratch2);
+  __ bctr();
+  masm->flush();
+
+  guarantee(__ pc() <= s->code_end(), "overflowed buffer");
+
+  s->set_exception_points(npe_addr, ame_addr);
+
+  return s;
+}
+
+VtableStub* VtableStubs::create_itable_stub(int vtable_index) {
+  // PPC port: use fixed size.
+  const int code_length = VtableStub::pd_code_size_limit(false);
+  VtableStub* s = new (code_length) VtableStub(false, vtable_index);
+  ResourceMark rm;
+  CodeBuffer cb(s->entry_point(), code_length);
+  MacroAssembler* masm = new MacroAssembler(&cb);
+  address start_pc;
+
+#ifndef PRODUCT
+  if (CountCompiledCalls) {
+    __ load_const(R11_scratch1, SharedRuntime::nof_megamorphic_calls_addr());
+    __ lwz(R12_scratch2, 0, R11_scratch1);
+    __ addi(R12_scratch2, R12_scratch2, 1);
+    __ stw(R12_scratch2, 0, R11_scratch1);
+  }
+#endif
+
+  assert(VtableStub::receiver_location() == R3_ARG1->as_VMReg(), "receiver expected in R3_ARG1");
+
+  // Entry arguments:
+  //  R19_method: Interface
+  //  R3_ARG1: Receiver
+  //
+
+  const Register rcvr_klass = R11_scratch1;
+  const Register vtable_len = R12_scratch2;
+  const Register itable_entry_addr = R21_tmp1;
+  const Register itable_interface = R22_tmp2;
+
+  // Get receiver klass.
+
+  // We might implicit NULL fault here.
+  address npe_addr = __ pc(); // npe = null pointer exception
+  __ load_klass_with_trap_null_check(rcvr_klass, R3_ARG1);
+
+  //__ ld(rcvr_klass, oopDesc::klass_offset_in_bytes(), R3_ARG1);
+
+  BLOCK_COMMENT("Load start of itable entries into itable_entry.");
+  __ lwz(vtable_len, InstanceKlass::vtable_length_offset() * wordSize, rcvr_klass);
+  __ slwi(vtable_len, vtable_len, exact_log2(vtableEntry::size() * wordSize));
+  __ add(itable_entry_addr, vtable_len, rcvr_klass);
+
+  // Loop over all itable entries until desired interfaceOop(Rinterface) found.
+  BLOCK_COMMENT("Increment itable_entry_addr in loop.");
+  const int vtable_base_offset = InstanceKlass::vtable_start_offset() * wordSize;
+  __ addi(itable_entry_addr, itable_entry_addr, vtable_base_offset + itableOffsetEntry::interface_offset_in_bytes());
+
+  const int itable_offset_search_inc = itableOffsetEntry::size() * wordSize;
+  Label search;
+  __ bind(search);
+  __ ld(itable_interface, 0, itable_entry_addr);
+
+  // Handle IncompatibleClassChangeError in itable stubs.
+  // If the entry is NULL then we've reached the end of the table
+  // without finding the expected interface, so throw an exception.
+  BLOCK_COMMENT("Handle IncompatibleClassChangeError in itable stubs.");
+  Label throw_icce;
+  __ cmpdi(CCR1, itable_interface, 0);
+  __ cmpd(CCR0, itable_interface, R19_method);
+  __ addi(itable_entry_addr, itable_entry_addr, itable_offset_search_inc);
+  __ beq(CCR1, throw_icce);
+  __ bne(CCR0, search);
+
+  // Entry found and itable_entry_addr points to it, get offset of vtable for interface.
+
+  const Register vtable_offset = R12_scratch2;
+  const Register itable_method = R11_scratch1;
+
+  const int vtable_offset_offset = (itableOffsetEntry::offset_offset_in_bytes() -
+                                    itableOffsetEntry::interface_offset_in_bytes()) -
+                                   itable_offset_search_inc;
+  __ lwz(vtable_offset, vtable_offset_offset, itable_entry_addr);
+
+  // Compute itableMethodEntry and get methodOop and entry point for compiler.
+  const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) +
+    itableMethodEntry::method_offset_in_bytes();
+
+  __ add(itable_method, rcvr_klass, vtable_offset);
+  __ ld(R19_method, method_offset, itable_method);
+
+#ifndef PRODUCT
+  if (DebugVtables) {
+    Label ok;
+    __ cmpd(CCR0, R19_method, 0);
+    __ bne(CCR0, ok);
+    __ stop("methodOop is null", 103);
+    __ bind(ok);
+  }
+#endif
+
+  // If the vtable entry is null, the method is abstract.
+  address ame_addr = __ pc(); // ame = abstract method error
+
+  // Must do an explicit check if implicit checks are disabled.
+  assert(!MacroAssembler::needs_explicit_null_check(in_bytes(Method::from_compiled_offset())), "sanity");
+  if (!ImplicitNullChecks NOT_LINUX(|| true) /*!os::zero_page_read_protected()*/) {
+    if (TrapBasedNullChecks) {
+      __ trap_null_check(R19_method);
+    } else {
+      __ cmpdi(CCR0, R19_method, 0);
+      __ beq(CCR0, throw_icce);
+    }
+  }
+  __ ld(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method);
+  __ mtctr(R12_scratch2);
+  __ bctr();
+
+  // Handle IncompatibleClassChangeError in itable stubs.
+  // More detailed error message.
+  // We force resolving of the call site by jumping to the "handle
+  // wrong method" stub, and so let the interpreter runtime do all the
+  // dirty work.
+  __ bind(throw_icce);
+  __ load_const(R11_scratch1, SharedRuntime::get_handle_wrong_method_stub());
+  __ mtctr(R11_scratch1);
+  __ bctr();
+
+  masm->flush();
+
+  guarantee(__ pc() <= s->code_end(), "overflowed buffer");
+
+  s->set_exception_points(npe_addr, ame_addr);
+  return s;
+}
+
+int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
+  if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) {
+    return 1000;
+  } else {
+    if (is_vtable_stub) {
+      return 20 + 16 + 8;    // Plain + (cOops & Traps) + safety
+    } else {
+      return 16 + 96;
+    }
+  }
+}
+
+int VtableStub::pd_code_alignment() {
+  const unsigned int icache_line_size = 32;
+  return icache_line_size;
+}