jdk-sandbox: comparison src/hotspot/cpu/ppc/interp_masm_ppc

equal deleted inserted replaced

-:4ebc2e2fb97c
+:71c04702a3d5
+/*
+* Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
+* Copyright (c) 2012, 2017 SAP SE. 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 "interp_masm_ppc.hpp"
+#include "interpreter/interpreterRuntime.hpp"
+#include "prims/jvmtiThreadState.hpp"
+#include "runtime/sharedRuntime.hpp"
+#ifdef PRODUCT
+#define BLOCK_COMMENT(str) // nothing
+#else
+#define BLOCK_COMMENT(str) block_comment(str)
+#endif
+void InterpreterMacroAssembler::null_check_throw(Register a, int offset, Register temp_reg) {
+address exception_entry = Interpreter::throw_NullPointerException_entry();
+MacroAssembler::null_check_throw(a, offset, temp_reg, exception_entry);
+}
+void InterpreterMacroAssembler::jump_to_entry(address entry, Register Rscratch) {
+assert(entry, "Entry must have been generated by now");
+if (is_within_range_of_b(entry, pc())) {
+b(entry);
+} else {
+load_const_optimized(Rscratch, entry, R0);
+mtctr(Rscratch);
+bctr();
+}
+}
+void InterpreterMacroAssembler::dispatch_next(TosState state, int bcp_incr) {
+Register bytecode = R12_scratch2;
+if (bcp_incr != 0) {
+lbzu(bytecode, bcp_incr, R14_bcp);
+} else {
+lbz(bytecode, 0, R14_bcp);
+}
+dispatch_Lbyte_code(state, bytecode, Interpreter::dispatch_table(state));
+}
+void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
+// Load current bytecode.
+Register bytecode = R12_scratch2;
+lbz(bytecode, 0, R14_bcp);
+dispatch_Lbyte_code(state, bytecode, table);
+}
+// Dispatch code executed in the prolog of a bytecode which does not do it's
+// own dispatch. The dispatch address is computed and placed in R24_dispatch_addr.
+void InterpreterMacroAssembler::dispatch_prolog(TosState state, int bcp_incr) {
+Register bytecode = R12_scratch2;
+lbz(bytecode, bcp_incr, R14_bcp);
+load_dispatch_table(R24_dispatch_addr, Interpreter::dispatch_table(state));
+sldi(bytecode, bytecode, LogBytesPerWord);
+ldx(R24_dispatch_addr, R24_dispatch_addr, bytecode);
+}
+// Dispatch code executed in the epilog of a bytecode which does not do it's
+// own dispatch. The dispatch address in R24_dispatch_addr is used for the
+// dispatch.
+void InterpreterMacroAssembler::dispatch_epilog(TosState state, int bcp_incr) {
+if (bcp_incr) { addi(R14_bcp, R14_bcp, bcp_incr); }
+mtctr(R24_dispatch_addr);
+bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable);
+}
+void InterpreterMacroAssembler::check_and_handle_popframe(Register scratch_reg) {
+assert(scratch_reg != R0, "can't use R0 as scratch_reg here");
+if (JvmtiExport::can_pop_frame()) {
+Label L;
+// Check the "pending popframe condition" flag in the current thread.
+lwz(scratch_reg, in_bytes(JavaThread::popframe_condition_offset()), R16_thread);
+// Initiate popframe handling only if it is not already being
+// processed. If the flag has the popframe_processing bit set, it
+// means that this code is called *during* popframe handling - we
+// don't want to reenter.
+andi_(R0, scratch_reg, JavaThread::popframe_pending_bit);
+beq(CCR0, L);
+andi_(R0, scratch_reg, JavaThread::popframe_processing_bit);
+bne(CCR0, L);
+// Call the Interpreter::remove_activation_preserving_args_entry()
+// func to get the address of the same-named entrypoint in the
+// generated interpreter code.
+#if defined(ABI_ELFv2)
+call_c(CAST_FROM_FN_PTR(address,
+Interpreter::remove_activation_preserving_args_entry),
+relocInfo::none);
+#else
+call_c(CAST_FROM_FN_PTR(FunctionDescriptor*,
+Interpreter::remove_activation_preserving_args_entry),
+relocInfo::none);
+#endif
+// Jump to Interpreter::_remove_activation_preserving_args_entry.
+mtctr(R3_RET);
+bctr();
+align(32, 12);
+bind(L);
+}
+}
+void InterpreterMacroAssembler::check_and_handle_earlyret(Register scratch_reg) {
+const Register Rthr_state_addr = scratch_reg;
+if (JvmtiExport::can_force_early_return()) {
+Label Lno_early_ret;
+ld(Rthr_state_addr, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread);
+cmpdi(CCR0, Rthr_state_addr, 0);
+beq(CCR0, Lno_early_ret);
+lwz(R0, in_bytes(JvmtiThreadState::earlyret_state_offset()), Rthr_state_addr);
+cmpwi(CCR0, R0, JvmtiThreadState::earlyret_pending);
+bne(CCR0, Lno_early_ret);
+// Jump to Interpreter::_earlyret_entry.
+lwz(R3_ARG1, in_bytes(JvmtiThreadState::earlyret_tos_offset()), Rthr_state_addr);
+call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry));
+mtlr(R3_RET);
+blr();
+align(32, 12);
+bind(Lno_early_ret);
+}
+}
+void InterpreterMacroAssembler::load_earlyret_value(TosState state, Register Rscratch1) {
+const Register RjvmtiState = Rscratch1;
+const Register Rscratch2   = R0;
+ld(RjvmtiState, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread);
+li(Rscratch2, 0);
+switch (state) {
+case atos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState);
+std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState);
+break;
+case ltos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
+break;
+case btos: // fall through
+case ztos: // fall through
+case ctos: // fall through
+case stos: // fall through
+case itos: lwz(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
+break;
+case ftos: lfs(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
+break;
+case dtos: lfd(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
+break;
+case vtos: break;
+default  : ShouldNotReachHere();
+}
+// Clean up tos value in the jvmti thread state.
+std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
+// Set tos state field to illegal value.
+li(Rscratch2, ilgl);
+stw(Rscratch2, in_bytes(JvmtiThreadState::earlyret_tos_offset()), RjvmtiState);
+}
+// Common code to dispatch and dispatch_only.
+// Dispatch value in Lbyte_code and increment Lbcp.
+void InterpreterMacroAssembler::load_dispatch_table(Register dst, address* table) {
+address table_base = (address)Interpreter::dispatch_table((TosState)0);
+intptr_t table_offs = (intptr_t)table - (intptr_t)table_base;
+if (is_simm16(table_offs)) {
+addi(dst, R25_templateTableBase, (int)table_offs);
+} else {
+load_const_optimized(dst, table, R0);
+}
+}
+void InterpreterMacroAssembler::dispatch_Lbyte_code(TosState state, Register bytecode,
+address* table, bool verify) {
+if (verify) {
+unimplemented("dispatch_Lbyte_code: verify"); // See Sparc Implementation to implement this
+}
+assert_different_registers(bytecode, R11_scratch1);
+// Calc dispatch table address.
+load_dispatch_table(R11_scratch1, table);
+sldi(R12_scratch2, bytecode, LogBytesPerWord);
+ldx(R11_scratch1, R11_scratch1, R12_scratch2);
+// Jump off!
+mtctr(R11_scratch1);
+bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable);
+}
+void InterpreterMacroAssembler::load_receiver(Register Rparam_count, Register Rrecv_dst) {
+sldi(Rrecv_dst, Rparam_count, Interpreter::logStackElementSize);
+ldx(Rrecv_dst, Rrecv_dst, R15_esp);
+}
+// helpers for expression stack
+void InterpreterMacroAssembler::pop_i(Register r) {
+lwzu(r, Interpreter::stackElementSize, R15_esp);
+}
+void InterpreterMacroAssembler::pop_ptr(Register r) {
+ldu(r, Interpreter::stackElementSize, R15_esp);
+}
+void InterpreterMacroAssembler::pop_l(Register r) {
+ld(r, Interpreter::stackElementSize, R15_esp);
+addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize);
+}
+void InterpreterMacroAssembler::pop_f(FloatRegister f) {
+lfsu(f, Interpreter::stackElementSize, R15_esp);
+}
+void InterpreterMacroAssembler::pop_d(FloatRegister f) {
+lfd(f, Interpreter::stackElementSize, R15_esp);
+addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize);
+}
+void InterpreterMacroAssembler::push_i(Register r) {
+stw(r, 0, R15_esp);
+addi(R15_esp, R15_esp, - Interpreter::stackElementSize );
+}
+void InterpreterMacroAssembler::push_ptr(Register r) {
+std(r, 0, R15_esp);
+addi(R15_esp, R15_esp, - Interpreter::stackElementSize );
+}
+void InterpreterMacroAssembler::push_l(Register r) {
+// Clear unused slot.
+load_const_optimized(R0, 0L);
+std(R0, 0, R15_esp);
+std(r, - Interpreter::stackElementSize, R15_esp);
+addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize );
+}
+void InterpreterMacroAssembler::push_f(FloatRegister f) {
+stfs(f, 0, R15_esp);
+addi(R15_esp, R15_esp, - Interpreter::stackElementSize );
+}
+void InterpreterMacroAssembler::push_d(FloatRegister f)   {
+stfd(f, - Interpreter::stackElementSize, R15_esp);
+addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize );
+}
+void InterpreterMacroAssembler::push_2ptrs(Register first, Register second) {
+std(first, 0, R15_esp);
+std(second, -Interpreter::stackElementSize, R15_esp);
+addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize );
+}
+void InterpreterMacroAssembler::move_l_to_d(Register l, FloatRegister d) {
+if (VM_Version::has_mtfprd()) {
+mtfprd(d, l);
+} else {
+std(l, 0, R15_esp);
+lfd(d, 0, R15_esp);
+}
+}
+void InterpreterMacroAssembler::move_d_to_l(FloatRegister d, Register l) {
+if (VM_Version::has_mtfprd()) {
+mffprd(l, d);
+} else {
+stfd(d, 0, R15_esp);
+ld(l, 0, R15_esp);
+}
+}
+void InterpreterMacroAssembler::push(TosState state) {
+switch (state) {
+case atos: push_ptr();                break;
+case btos:
+case ztos:
+case ctos:
+case stos:
+case itos: push_i();                  break;
+case ltos: push_l();                  break;
+case ftos: push_f();                  break;
+case dtos: push_d();                  break;
+case vtos: /* nothing to do */        break;
+default  : ShouldNotReachHere();
+}
+}
+void InterpreterMacroAssembler::pop(TosState state) {
+switch (state) {
+case atos: pop_ptr();            break;
+case btos:
+case ztos:
+case ctos:
+case stos:
+case itos: pop_i();              break;
+case ltos: pop_l();              break;
+case ftos: pop_f();              break;
+case dtos: pop_d();              break;
+case vtos: /* nothing to do */   break;
+default  : ShouldNotReachHere();
+}
+verify_oop(R17_tos, state);
+}
+void InterpreterMacroAssembler::empty_expression_stack() {
+addi(R15_esp, R26_monitor, - Interpreter::stackElementSize);
+}
+void InterpreterMacroAssembler::get_2_byte_integer_at_bcp(int         bcp_offset,
+Register    Rdst,
+signedOrNot is_signed) {
+#if defined(VM_LITTLE_ENDIAN)
+if (bcp_offset) {
+load_const_optimized(Rdst, bcp_offset);
+lhbrx(Rdst, R14_bcp, Rdst);
+} else {
+lhbrx(Rdst, R14_bcp);
+}
+if (is_signed == Signed) {
+extsh(Rdst, Rdst);
+}
+#else
+// Read Java big endian format.
+if (is_signed == Signed) {
+lha(Rdst, bcp_offset, R14_bcp);
+} else {
+lhz(Rdst, bcp_offset, R14_bcp);
+}
+#endif
+}
+void InterpreterMacroAssembler::get_4_byte_integer_at_bcp(int         bcp_offset,
+Register    Rdst,
+signedOrNot is_signed) {
+#if defined(VM_LITTLE_ENDIAN)
+if (bcp_offset) {
+load_const_optimized(Rdst, bcp_offset);
+lwbrx(Rdst, R14_bcp, Rdst);
+} else {
+lwbrx(Rdst, R14_bcp);
+}
+if (is_signed == Signed) {
+extsw(Rdst, Rdst);
+}
+#else
+// Read Java big endian format.
+if (bcp_offset & 3) { // Offset unaligned?
+load_const_optimized(Rdst, bcp_offset);
+if (is_signed == Signed) {
+lwax(Rdst, R14_bcp, Rdst);
+} else {
+lwzx(Rdst, R14_bcp, Rdst);
+}
+} else {
+if (is_signed == Signed) {
+lwa(Rdst, bcp_offset, R14_bcp);
+} else {
+lwz(Rdst, bcp_offset, R14_bcp);
+}
+}
+#endif
+}
+// Load the constant pool cache index from the bytecode stream.
+//
+// Kills / writes:
+//   - Rdst, Rscratch
+void InterpreterMacroAssembler::get_cache_index_at_bcp(Register Rdst, int bcp_offset,
+size_t index_size) {
+assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
+// Cache index is always in the native format, courtesy of Rewriter.
+if (index_size == sizeof(u2)) {
+lhz(Rdst, bcp_offset, R14_bcp);
+} else if (index_size == sizeof(u4)) {
+if (bcp_offset & 3) {
+load_const_optimized(Rdst, bcp_offset);
+lwax(Rdst, R14_bcp, Rdst);
+} else {
+lwa(Rdst, bcp_offset, R14_bcp);
+}
+assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
+nand(Rdst, Rdst, Rdst); // convert to plain index
+} else if (index_size == sizeof(u1)) {
+lbz(Rdst, bcp_offset, R14_bcp);
+} else {
+ShouldNotReachHere();
+}
+// Rdst now contains cp cache index.
+}
+void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, int bcp_offset,
+size_t index_size) {
+get_cache_index_at_bcp(cache, bcp_offset, index_size);
+sldi(cache, cache, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord));
+add(cache, R27_constPoolCache, cache);
+}
+// Load 4-byte signed or unsigned integer in Java format (that is, big-endian format)
+// from (Rsrc)+offset.
+void InterpreterMacroAssembler::get_u4(Register Rdst, Register Rsrc, int offset,
+signedOrNot is_signed) {
+#if defined(VM_LITTLE_ENDIAN)
+if (offset) {
+load_const_optimized(Rdst, offset);
+lwbrx(Rdst, Rdst, Rsrc);
+} else {
+lwbrx(Rdst, Rsrc);
+}
+if (is_signed == Signed) {
+extsw(Rdst, Rdst);
+}
+#else
+if (is_signed == Signed) {
+lwa(Rdst, offset, Rsrc);
+} else {
+lwz(Rdst, offset, Rsrc);
+}
+#endif
+}
+// Load object from cpool->resolved_references(index).
+void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result, Register index, Label *is_null) {
+assert_different_registers(result, index);
+get_constant_pool(result);
+// Convert from field index to resolved_references() index and from
+// word index to byte offset. Since this is a java object, it can be compressed.
+Register tmp = index;  // reuse
+sldi(tmp, index, LogBytesPerHeapOop);
+// Load pointer for resolved_references[] objArray.
+ld(result, ConstantPool::cache_offset_in_bytes(), result);
+ld(result, ConstantPoolCache::resolved_references_offset_in_bytes(), result);
+resolve_oop_handle(result);
+#ifdef ASSERT
+Label index_ok;
+lwa(R0, arrayOopDesc::length_offset_in_bytes(), result);
+sldi(R0, R0, LogBytesPerHeapOop);
+cmpd(CCR0, tmp, R0);
+blt(CCR0, index_ok);
+stop("resolved reference index out of bounds", 0x09256);
+bind(index_ok);
+#endif
+// Add in the index.
+add(result, tmp, result);
+load_heap_oop(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT), result, is_null);
+}
+// load cpool->resolved_klass_at(index)
+void InterpreterMacroAssembler::load_resolved_klass_at_offset(Register Rcpool, Register Roffset, Register Rklass) {
+// int value = *(Rcpool->int_at_addr(which));
+// int resolved_klass_index = extract_low_short_from_int(value);
+add(Roffset, Rcpool, Roffset);
+#if defined(VM_LITTLE_ENDIAN)
+lhz(Roffset, sizeof(ConstantPool), Roffset);     // Roffset = resolved_klass_index
+#else
+lhz(Roffset, sizeof(ConstantPool) + 2, Roffset); // Roffset = resolved_klass_index
+#endif
+ld(Rklass, ConstantPool::resolved_klasses_offset_in_bytes(), Rcpool); // Rklass = Rcpool->_resolved_klasses
+sldi(Roffset, Roffset, LogBytesPerWord);
+addi(Roffset, Roffset, Array<Klass*>::base_offset_in_bytes());
+isync(); // Order load of instance Klass wrt. tags.
+ldx(Rklass, Rklass, Roffset);
+}
+// Generate a subtype check: branch to ok_is_subtype if sub_klass is
+// a subtype of super_klass. Blows registers Rsub_klass, tmp1, tmp2.
+void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, Register Rsuper_klass, Register Rtmp1,
+Register Rtmp2, Register Rtmp3, Label &ok_is_subtype) {
+// Profile the not-null value's klass.
+profile_typecheck(Rsub_klass, Rtmp1, Rtmp2);
+check_klass_subtype(Rsub_klass, Rsuper_klass, Rtmp1, Rtmp2, ok_is_subtype);
+profile_typecheck_failed(Rtmp1, Rtmp2);
+}
+// Separate these two to allow for delay slot in middle.
+// These are used to do a test and full jump to exception-throwing code.
+// Check that index is in range for array, then shift index by index_shift,
+// and put arrayOop + shifted_index into res.
+// Note: res is still shy of address by array offset into object.
+void InterpreterMacroAssembler::index_check_without_pop(Register Rarray, Register Rindex,
+int index_shift, Register Rtmp, Register Rres) {
+// Check that index is in range for array, then shift index by index_shift,
+// and put arrayOop + shifted_index into res.
+// Note: res is still shy of address by array offset into object.
+// Kills:
+//   - Rindex
+// Writes:
+//   - Rres: Address that corresponds to the array index if check was successful.
+verify_oop(Rarray);
+const Register Rlength   = R0;
+const Register RsxtIndex = Rtmp;
+Label LisNull, LnotOOR;
+// Array nullcheck
+if (!ImplicitNullChecks) {
+cmpdi(CCR0, Rarray, 0);
+beq(CCR0, LisNull);
+} else {
+null_check_throw(Rarray, arrayOopDesc::length_offset_in_bytes(), /*temp*/RsxtIndex);
+}
+// Rindex might contain garbage in upper bits (remember that we don't sign extend
+// during integer arithmetic operations). So kill them and put value into same register
+// where ArrayIndexOutOfBounds would expect the index in.
+rldicl(RsxtIndex, Rindex, 0, 32); // zero extend 32 bit -> 64 bit
+// Index check
+lwz(Rlength, arrayOopDesc::length_offset_in_bytes(), Rarray);
+cmplw(CCR0, Rindex, Rlength);
+sldi(RsxtIndex, RsxtIndex, index_shift);
+blt(CCR0, LnotOOR);
+// Index should be in R17_tos, array should be in R4_ARG2.
+mr_if_needed(R17_tos, Rindex);
+mr_if_needed(R4_ARG2, Rarray);
+load_dispatch_table(Rtmp, (address*)Interpreter::_throw_ArrayIndexOutOfBoundsException_entry);
+mtctr(Rtmp);
+bctr();
+if (!ImplicitNullChecks) {
+bind(LisNull);
+load_dispatch_table(Rtmp, (address*)Interpreter::_throw_NullPointerException_entry);
+mtctr(Rtmp);
+bctr();
+}
+align(32, 16);
+bind(LnotOOR);
+// Calc address
+add(Rres, RsxtIndex, Rarray);
+}
+void InterpreterMacroAssembler::index_check(Register array, Register index,
+int index_shift, Register tmp, Register res) {
+// pop array
+pop_ptr(array);
+// check array
+index_check_without_pop(array, index, index_shift, tmp, res);
+}
+void InterpreterMacroAssembler::get_const(Register Rdst) {
+ld(Rdst, in_bytes(Method::const_offset()), R19_method);
+}
+void InterpreterMacroAssembler::get_constant_pool(Register Rdst) {
+get_const(Rdst);
+ld(Rdst, in_bytes(ConstMethod::constants_offset()), Rdst);
+}
+void InterpreterMacroAssembler::get_constant_pool_cache(Register Rdst) {
+get_constant_pool(Rdst);
+ld(Rdst, ConstantPool::cache_offset_in_bytes(), Rdst);
+}
+void InterpreterMacroAssembler::get_cpool_and_tags(Register Rcpool, Register Rtags) {
+get_constant_pool(Rcpool);
+ld(Rtags, ConstantPool::tags_offset_in_bytes(), Rcpool);
+}
+// Unlock if synchronized method.
+//
+// Unlock the receiver if this is a synchronized method.
+// Unlock any Java monitors from synchronized blocks.
+//
+// If there are locked Java monitors
+//   If throw_monitor_exception
+//     throws IllegalMonitorStateException
+//   Else if install_monitor_exception
+//     installs IllegalMonitorStateException
+//   Else
+//     no error processing
+void InterpreterMacroAssembler::unlock_if_synchronized_method(TosState state,
+bool throw_monitor_exception,
+bool install_monitor_exception) {
+Label Lunlocked, Lno_unlock;
+{
+Register Rdo_not_unlock_flag = R11_scratch1;
+Register Raccess_flags       = R12_scratch2;
+// Check if synchronized method or unlocking prevented by
+// JavaThread::do_not_unlock_if_synchronized flag.
+lbz(Rdo_not_unlock_flag, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread);
+lwz(Raccess_flags, in_bytes(Method::access_flags_offset()), R19_method);
+li(R0, 0);
+stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); // reset flag
+push(state);
+// Skip if we don't have to unlock.
+rldicl_(R0, Raccess_flags, 64-JVM_ACC_SYNCHRONIZED_BIT, 63); // Extract bit and compare to 0.
+beq(CCR0, Lunlocked);
+cmpwi(CCR0, Rdo_not_unlock_flag, 0);
+bne(CCR0, Lno_unlock);
+}
+// Unlock
+{
+Register Rmonitor_base = R11_scratch1;
+Label Lunlock;
+// If it's still locked, everything is ok, unlock it.
+ld(Rmonitor_base, 0, R1_SP);
+addi(Rmonitor_base, Rmonitor_base,
+-(frame::ijava_state_size + frame::interpreter_frame_monitor_size_in_bytes())); // Monitor base
+ld(R0, BasicObjectLock::obj_offset_in_bytes(), Rmonitor_base);
+cmpdi(CCR0, R0, 0);
+bne(CCR0, Lunlock);
+// If it's already unlocked, throw exception.
+if (throw_monitor_exception) {
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
+should_not_reach_here();
+} else {
+if (install_monitor_exception) {
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
+b(Lunlocked);
+}
+}
+bind(Lunlock);
+unlock_object(Rmonitor_base);
+}
+// Check that all other monitors are unlocked. Throw IllegelMonitorState exception if not.
+bind(Lunlocked);
+{
+Label Lexception, Lrestart;
+Register Rcurrent_obj_addr = R11_scratch1;
+const int delta = frame::interpreter_frame_monitor_size_in_bytes();
+assert((delta & LongAlignmentMask) == 0, "sizeof BasicObjectLock must be even number of doublewords");
+bind(Lrestart);
+// Set up search loop: Calc num of iterations.
+{
+Register Riterations = R12_scratch2;
+Register Rmonitor_base = Rcurrent_obj_addr;
+ld(Rmonitor_base, 0, R1_SP);
+addi(Rmonitor_base, Rmonitor_base, - frame::ijava_state_size);  // Monitor base
+subf_(Riterations, R26_monitor, Rmonitor_base);
+ble(CCR0, Lno_unlock);
+addi(Rcurrent_obj_addr, Rmonitor_base,
+BasicObjectLock::obj_offset_in_bytes() - frame::interpreter_frame_monitor_size_in_bytes());
+// Check if any monitor is on stack, bail out if not
+srdi(Riterations, Riterations, exact_log2(delta));
+mtctr(Riterations);
+}
+// The search loop: Look for locked monitors.
+{
+const Register Rcurrent_obj = R0;
+Label Lloop;
+ld(Rcurrent_obj, 0, Rcurrent_obj_addr);
+addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta);
+bind(Lloop);
+// Check if current entry is used.
+cmpdi(CCR0, Rcurrent_obj, 0);
+bne(CCR0, Lexception);
+// Preload next iteration's compare value.
+ld(Rcurrent_obj, 0, Rcurrent_obj_addr);
+addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta);
+bdnz(Lloop);
+}
+// Fell through: Everything's unlocked => finish.
+b(Lno_unlock);
+// An object is still locked => need to throw exception.
+bind(Lexception);
+if (throw_monitor_exception) {
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
+should_not_reach_here();
+} else {
+// Stack unrolling. Unlock object and if requested, install illegal_monitor_exception.
+// Unlock does not block, so don't have to worry about the frame.
+Register Rmonitor_addr = R11_scratch1;
+addi(Rmonitor_addr, Rcurrent_obj_addr, -BasicObjectLock::obj_offset_in_bytes() + delta);
+unlock_object(Rmonitor_addr);
+if (install_monitor_exception) {
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
+}
+b(Lrestart);
+}
+}
+align(32, 12);
+bind(Lno_unlock);
+pop(state);
+}
+// Support function for remove_activation & Co.
+void InterpreterMacroAssembler::merge_frames(Register Rsender_sp, Register return_pc,
+Register Rscratch1, Register Rscratch2) {
+// Pop interpreter frame.
+ld(Rscratch1, 0, R1_SP); // *SP
+ld(Rsender_sp, _ijava_state_neg(sender_sp), Rscratch1); // top_frame_sp
+ld(Rscratch2, 0, Rscratch1); // **SP
+#ifdef ASSERT
+{
+Label Lok;
+ld(R0, _ijava_state_neg(ijava_reserved), Rscratch1);
+cmpdi(CCR0, R0, 0x5afe);
+beq(CCR0, Lok);
+stop("frame corrupted (remove activation)", 0x5afe);
+bind(Lok);
+}
+#endif
+if (return_pc!=noreg) {
+ld(return_pc, _abi(lr), Rscratch1); // LR
+}
+// Merge top frames.
+subf(Rscratch1, R1_SP, Rsender_sp); // top_frame_sp - SP
+stdux(Rscratch2, R1_SP, Rscratch1); // atomically set *(SP = top_frame_sp) = **SP
+}
+void InterpreterMacroAssembler::narrow(Register result) {
+Register ret_type = R11_scratch1;
+ld(R11_scratch1, in_bytes(Method::const_offset()), R19_method);
+lbz(ret_type, in_bytes(ConstMethod::result_type_offset()), R11_scratch1);
+Label notBool, notByte, notChar, done;
+// common case first
+cmpwi(CCR0, ret_type, T_INT);
+beq(CCR0, done);
+cmpwi(CCR0, ret_type, T_BOOLEAN);
+bne(CCR0, notBool);
+andi(result, result, 0x1);
+b(done);
+bind(notBool);
+cmpwi(CCR0, ret_type, T_BYTE);
+bne(CCR0, notByte);
+extsb(result, result);
+b(done);
+bind(notByte);
+cmpwi(CCR0, ret_type, T_CHAR);
+bne(CCR0, notChar);
+andi(result, result, 0xffff);
+b(done);
+bind(notChar);
+// cmpwi(CCR0, ret_type, T_SHORT);  // all that's left
+// bne(CCR0, done);
+extsh(result, result);
+// Nothing to do for T_INT
+bind(done);
+}
+// Remove activation.
+//
+// Unlock the receiver if this is a synchronized method.
+// Unlock any Java monitors from synchronized blocks.
+// Remove the activation from the stack.
+//
+// If there are locked Java monitors
+//    If throw_monitor_exception
+//       throws IllegalMonitorStateException
+//    Else if install_monitor_exception
+//       installs IllegalMonitorStateException
+//    Else
+//       no error processing
+void InterpreterMacroAssembler::remove_activation(TosState state,
+bool throw_monitor_exception,
+bool install_monitor_exception) {
+BLOCK_COMMENT("remove_activation {");
+unlock_if_synchronized_method(state, throw_monitor_exception, install_monitor_exception);
+// Save result (push state before jvmti call and pop it afterwards) and notify jvmti.
+notify_method_exit(false, state, NotifyJVMTI, true);
+BLOCK_COMMENT("reserved_stack_check:");
+if (StackReservedPages > 0) {
+// Test if reserved zone needs to be enabled.
+Label no_reserved_zone_enabling;
+// Compare frame pointers. There is no good stack pointer, as with stack
+// frame compression we can get different SPs when we do calls. A subsequent
+// call could have a smaller SP, so that this compare succeeds for an
+// inner call of the method annotated with ReservedStack.
+ld_ptr(R0, JavaThread::reserved_stack_activation_offset(), R16_thread);
+ld_ptr(R11_scratch1, _abi(callers_sp), R1_SP); // Load frame pointer.
+cmpld(CCR0, R11_scratch1, R0);
+blt_predict_taken(CCR0, no_reserved_zone_enabling);
+// Enable reserved zone again, throw stack overflow exception.
+call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), R16_thread);
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_delayed_StackOverflowError));
+should_not_reach_here();
+bind(no_reserved_zone_enabling);
+}
+verify_oop(R17_tos, state);
+verify_thread();
+merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2);
+mtlr(R0);
+BLOCK_COMMENT("} remove_activation");
+}
+// Lock object
+//
+// Registers alive
+//   monitor - Address of the BasicObjectLock to be used for locking,
+//             which must be initialized with the object to lock.
+//   object  - Address of the object to be locked.
+//
+void InterpreterMacroAssembler::lock_object(Register monitor, Register object) {
+if (UseHeavyMonitors) {
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
+monitor, /*check_for_exceptions=*/true);
+} else {
+// template code:
+//
+// markOop displaced_header = obj->mark().set_unlocked();
+// monitor->lock()->set_displaced_header(displaced_header);
+// if (Atomic::cmpxchg_ptr(/*ex=*/monitor, /*addr*/obj->mark_addr(), /*cmp*/displaced_header) == displaced_header) {
+//   // We stored the monitor address into the object's mark word.
+// } else if (THREAD->is_lock_owned((address)displaced_header))
+//   // Simple recursive case.
+//   monitor->lock()->set_displaced_header(NULL);
+// } else {
+//   // Slow path.
+//   InterpreterRuntime::monitorenter(THREAD, monitor);
+// }
+const Register displaced_header = R7_ARG5;
+const Register object_mark_addr = R8_ARG6;
+const Register current_header   = R9_ARG7;
+const Register tmp              = R10_ARG8;
+Label done;
+Label cas_failed, slow_case;
+assert_different_registers(displaced_header, object_mark_addr, current_header, tmp);
+// markOop displaced_header = obj->mark().set_unlocked();
+// Load markOop from object into displaced_header.
+ld(displaced_header, oopDesc::mark_offset_in_bytes(), object);
+if (UseBiasedLocking) {
+biased_locking_enter(CCR0, object, displaced_header, tmp, current_header, done, &slow_case);
+}
+// Set displaced_header to be (markOop of object | UNLOCK_VALUE).
+ori(displaced_header, displaced_header, markOopDesc::unlocked_value);
+// monitor->lock()->set_displaced_header(displaced_header);
+// Initialize the box (Must happen before we update the object mark!).
+std(displaced_header, BasicObjectLock::lock_offset_in_bytes() +
+BasicLock::displaced_header_offset_in_bytes(), monitor);
+// if (Atomic::cmpxchg_ptr(/*ex=*/monitor, /*addr*/obj->mark_addr(), /*cmp*/displaced_header) == displaced_header) {
+// Store stack address of the BasicObjectLock (this is monitor) into object.
+addi(object_mark_addr, object, oopDesc::mark_offset_in_bytes());
+// Must fence, otherwise, preceding store(s) may float below cmpxchg.
+// CmpxchgX sets CCR0 to cmpX(current, displaced).
+cmpxchgd(/*flag=*/CCR0,
+/*current_value=*/current_header,
+/*compare_value=*/displaced_header, /*exchange_value=*/monitor,
+/*where=*/object_mark_addr,
+MacroAssembler::MemBarRel | MacroAssembler::MemBarAcq,
+MacroAssembler::cmpxchgx_hint_acquire_lock(),
+noreg,
+&cas_failed,
+/*check without membar and ldarx first*/true);
+// If the compare-and-exchange succeeded, then we found an unlocked
+// object and we have now locked it.
+b(done);
+bind(cas_failed);
+// } else if (THREAD->is_lock_owned((address)displaced_header))
+//   // Simple recursive case.
+//   monitor->lock()->set_displaced_header(NULL);
+// We did not see an unlocked object so try the fast recursive case.
+// Check if owner is self by comparing the value in the markOop of object
+// (current_header) with the stack pointer.
+sub(current_header, current_header, R1_SP);
+assert(os::vm_page_size() > 0xfff, "page size too small - change the constant");
+load_const_optimized(tmp, ~(os::vm_page_size()-1) | markOopDesc::lock_mask_in_place);
+and_(R0/*==0?*/, current_header, tmp);
+// If condition is true we are done and hence we can store 0 in the displaced
+// header indicating it is a recursive lock.
+bne(CCR0, slow_case);
+std(R0/*==0!*/, BasicObjectLock::lock_offset_in_bytes() +
+BasicLock::displaced_header_offset_in_bytes(), monitor);
+b(done);
+// } else {
+//   // Slow path.
+//   InterpreterRuntime::monitorenter(THREAD, monitor);
+// None of the above fast optimizations worked so we have to get into the
+// slow case of monitor enter.
+bind(slow_case);
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
+monitor, /*check_for_exceptions=*/true);
+// }
+align(32, 12);
+bind(done);
+}
+}
+// Unlocks an object. Used in monitorexit bytecode and remove_activation.
+//
+// Registers alive
+//   monitor - Address of the BasicObjectLock to be used for locking,
+//             which must be initialized with the object to lock.
+//
+// Throw IllegalMonitorException if object is not locked by current thread.
+void InterpreterMacroAssembler::unlock_object(Register monitor, bool check_for_exceptions) {
+if (UseHeavyMonitors) {
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
+monitor, check_for_exceptions);
+} else {
+// template code:
+//
+// if ((displaced_header = monitor->displaced_header()) == NULL) {
+//   // Recursive unlock. Mark the monitor unlocked by setting the object field to NULL.
+//   monitor->set_obj(NULL);
+// } else if (Atomic::cmpxchg_ptr(displaced_header, obj->mark_addr(), monitor) == monitor) {
+//   // We swapped the unlocked mark in displaced_header into the object's mark word.
+//   monitor->set_obj(NULL);
+// } else {
+//   // Slow path.
+//   InterpreterRuntime::monitorexit(THREAD, monitor);
+// }
+const Register object           = R7_ARG5;
+const Register displaced_header = R8_ARG6;
+const Register object_mark_addr = R9_ARG7;
+const Register current_header   = R10_ARG8;
+Label free_slot;
+Label slow_case;
+assert_different_registers(object, displaced_header, object_mark_addr, current_header);
+if (UseBiasedLocking) {
+// The object address from the monitor is in object.
+ld(object, BasicObjectLock::obj_offset_in_bytes(), monitor);
+assert(oopDesc::mark_offset_in_bytes() == 0, "offset of _mark is not 0");
+biased_locking_exit(CCR0, object, displaced_header, free_slot);
+}
+// Test first if we are in the fast recursive case.
+ld(displaced_header, BasicObjectLock::lock_offset_in_bytes() +
+BasicLock::displaced_header_offset_in_bytes(), monitor);
+// If the displaced header is zero, we have a recursive unlock.
+cmpdi(CCR0, displaced_header, 0);
+beq(CCR0, free_slot); // recursive unlock
+// } else if (Atomic::cmpxchg_ptr(displaced_header, obj->mark_addr(), monitor) == monitor) {
+//   // We swapped the unlocked mark in displaced_header into the object's mark word.
+//   monitor->set_obj(NULL);
+// If we still have a lightweight lock, unlock the object and be done.
+// The object address from the monitor is in object.
+if (!UseBiasedLocking) { ld(object, BasicObjectLock::obj_offset_in_bytes(), monitor); }
+addi(object_mark_addr, object, oopDesc::mark_offset_in_bytes());
+// We have the displaced header in displaced_header. If the lock is still
+// lightweight, it will contain the monitor address and we'll store the
+// displaced header back into the object's mark word.
+// CmpxchgX sets CCR0 to cmpX(current, monitor).
+cmpxchgd(/*flag=*/CCR0,
+/*current_value=*/current_header,
+/*compare_value=*/monitor, /*exchange_value=*/displaced_header,
+/*where=*/object_mark_addr,
+MacroAssembler::MemBarRel,
+MacroAssembler::cmpxchgx_hint_release_lock(),
+noreg,
+&slow_case);
+b(free_slot);
+// } else {
+//   // Slow path.
+//   InterpreterRuntime::monitorexit(THREAD, monitor);
+// The lock has been converted into a heavy lock and hence
+// we need to get into the slow case.
+bind(slow_case);
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
+monitor, check_for_exceptions);
+// }
+Label done;
+b(done); // Monitor register may be overwritten! Runtime has already freed the slot.
+// Exchange worked, do monitor->set_obj(NULL);
+align(32, 12);
+bind(free_slot);
+li(R0, 0);
+std(R0, BasicObjectLock::obj_offset_in_bytes(), monitor);
+bind(done);
+}
+}
+// Load compiled (i2c) or interpreter entry when calling from interpreted and
+// do the call. Centralized so that all interpreter calls will do the same actions.
+// If jvmti single stepping is on for a thread we must not call compiled code.
+//
+// Input:
+//   - Rtarget_method: method to call
+//   - Rret_addr:      return address
+//   - 2 scratch regs
+//
+void InterpreterMacroAssembler::call_from_interpreter(Register Rtarget_method, Register Rret_addr,
+Register Rscratch1, Register Rscratch2) {
+assert_different_registers(Rscratch1, Rscratch2, Rtarget_method, Rret_addr);
+// Assume we want to go compiled if available.
+const Register Rtarget_addr = Rscratch1;
+const Register Rinterp_only = Rscratch2;
+ld(Rtarget_addr, in_bytes(Method::from_interpreted_offset()), Rtarget_method);
+if (JvmtiExport::can_post_interpreter_events()) {
+lwz(Rinterp_only, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
+// JVMTI events, such as single-stepping, are implemented partly by avoiding running
+// compiled code in threads for which the event is enabled. Check here for
+// interp_only_mode if these events CAN be enabled.
+Label done;
+verify_thread();
+cmpwi(CCR0, Rinterp_only, 0);
+beq(CCR0, done);
+ld(Rtarget_addr, in_bytes(Method::interpreter_entry_offset()), Rtarget_method);
+align(32, 12);
+bind(done);
+}
+#ifdef ASSERT
+{
+Label Lok;
+cmpdi(CCR0, Rtarget_addr, 0);
+bne(CCR0, Lok);
+stop("null entry point");
+bind(Lok);
+}
+#endif // ASSERT
+mr(R21_sender_SP, R1_SP);
+// Calc a precise SP for the call. The SP value we calculated in
+// generate_fixed_frame() is based on the max_stack() value, so we would waste stack space
+// if esp is not max. Also, the i2c adapter extends the stack space without restoring
+// our pre-calced value, so repeating calls via i2c would result in stack overflow.
+// Since esp already points to an empty slot, we just have to sub 1 additional slot
+// to meet the abi scratch requirements.
+// The max_stack pointer will get restored by means of the GR_Lmax_stack local in
+// the return entry of the interpreter.
+addi(Rscratch2, R15_esp, Interpreter::stackElementSize - frame::abi_reg_args_size);
+clrrdi(Rscratch2, Rscratch2, exact_log2(frame::alignment_in_bytes)); // round towards smaller address
+resize_frame_absolute(Rscratch2, Rscratch2, R0);
+mr_if_needed(R19_method, Rtarget_method);
+mtctr(Rtarget_addr);
+mtlr(Rret_addr);
+save_interpreter_state(Rscratch2);
+#ifdef ASSERT
+ld(Rscratch1, _ijava_state_neg(top_frame_sp), Rscratch2); // Rscratch2 contains fp
+cmpd(CCR0, R21_sender_SP, Rscratch1);
+asm_assert_eq("top_frame_sp incorrect", 0x951);
+#endif
+bctr();
+}
+// Set the method data pointer for the current bcp.
+void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
+assert(ProfileInterpreter, "must be profiling interpreter");
+Label get_continue;
+ld(R28_mdx, in_bytes(Method::method_data_offset()), R19_method);
+test_method_data_pointer(get_continue);
+call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), R19_method, R14_bcp);
+addi(R28_mdx, R28_mdx, in_bytes(MethodData::data_offset()));
+add(R28_mdx, R28_mdx, R3_RET);
+bind(get_continue);
+}
+// Test ImethodDataPtr. If it is null, continue at the specified label.
+void InterpreterMacroAssembler::test_method_data_pointer(Label& zero_continue) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+cmpdi(CCR0, R28_mdx, 0);
+beq(CCR0, zero_continue);
+}
+void InterpreterMacroAssembler::verify_method_data_pointer() {
+assert(ProfileInterpreter, "must be profiling interpreter");
+#ifdef ASSERT
+Label verify_continue;
+test_method_data_pointer(verify_continue);
+// If the mdp is valid, it will point to a DataLayout header which is
+// consistent with the bcp. The converse is highly probable also.
+lhz(R11_scratch1, in_bytes(DataLayout::bci_offset()), R28_mdx);
+ld(R12_scratch2, in_bytes(Method::const_offset()), R19_method);
+addi(R11_scratch1, R11_scratch1, in_bytes(ConstMethod::codes_offset()));
+add(R11_scratch1, R12_scratch2, R12_scratch2);
+cmpd(CCR0, R11_scratch1, R14_bcp);
+beq(CCR0, verify_continue);
+call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp ), R19_method, R14_bcp, R28_mdx);
+bind(verify_continue);
+#endif
+}
+void InterpreterMacroAssembler::test_invocation_counter_for_mdp(Register invocation_count,
+Register method_counters,
+Register Rscratch,
+Label &profile_continue) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+// Control will flow to "profile_continue" if the counter is less than the
+// limit or if we call profile_method().
+Label done;
+// If no method data exists, and the counter is high enough, make one.
+lwz(Rscratch, in_bytes(MethodCounters::interpreter_profile_limit_offset()), method_counters);
+cmpdi(CCR0, R28_mdx, 0);
+// Test to see if we should create a method data oop.
+cmpd(CCR1, Rscratch, invocation_count);
+bne(CCR0, done);
+bge(CCR1, profile_continue);
+// Build it now.
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
+set_method_data_pointer_for_bcp();
+b(profile_continue);
+align(32, 12);
+bind(done);
+}
+void InterpreterMacroAssembler::test_backedge_count_for_osr(Register backedge_count, Register method_counters,
+Register target_bcp, Register disp, Register Rtmp) {
+assert_different_registers(backedge_count, target_bcp, disp, Rtmp, R4_ARG2);
+assert(UseOnStackReplacement,"Must UseOnStackReplacement to test_backedge_count_for_osr");
+Label did_not_overflow;
+Label overflow_with_error;
+lwz(Rtmp, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()), method_counters);
+cmpw(CCR0, backedge_count, Rtmp);
+blt(CCR0, did_not_overflow);
+// When ProfileInterpreter is on, the backedge_count comes from the
+// methodDataOop, which value does not get reset on the call to
+// frequency_counter_overflow(). To avoid excessive calls to the overflow
+// routine while the method is being compiled, add a second test to make sure
+// the overflow function is called only once every overflow_frequency.
+if (ProfileInterpreter) {
+const int overflow_frequency = 1024;
+andi_(Rtmp, backedge_count, overflow_frequency-1);
+bne(CCR0, did_not_overflow);
+}
+// Overflow in loop, pass branch bytecode.
+subf(R4_ARG2, disp, target_bcp); // Compute branch bytecode (previous bcp).
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R4_ARG2, true);
+// Was an OSR adapter generated?
+cmpdi(CCR0, R3_RET, 0);
+beq(CCR0, overflow_with_error);
+// Has the nmethod been invalidated already?
+lbz(Rtmp, nmethod::state_offset(), R3_RET);
+cmpwi(CCR0, Rtmp, nmethod::in_use);
+bne(CCR0, overflow_with_error);
+// Migrate the interpreter frame off of the stack.
+// We can use all registers because we will not return to interpreter from this point.
+// Save nmethod.
+const Register osr_nmethod = R31;
+mr(osr_nmethod, R3_RET);
+set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R11_scratch1);
+call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin), R16_thread);
+reset_last_Java_frame();
+// OSR buffer is in ARG1
+// Remove the interpreter frame.
+merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2);
+// Jump to the osr code.
+ld(R11_scratch1, nmethod::osr_entry_point_offset(), osr_nmethod);
+mtlr(R0);
+mtctr(R11_scratch1);
+bctr();
+align(32, 12);
+bind(overflow_with_error);
+bind(did_not_overflow);
+}
+// Store a value at some constant offset from the method data pointer.
+void InterpreterMacroAssembler::set_mdp_data_at(int constant, Register value) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+std(value, constant, R28_mdx);
+}
+// Increment the value at some constant offset from the method data pointer.
+void InterpreterMacroAssembler::increment_mdp_data_at(int constant,
+Register counter_addr,
+Register Rbumped_count,
+bool decrement) {
+// Locate the counter at a fixed offset from the mdp:
+addi(counter_addr, R28_mdx, constant);
+increment_mdp_data_at(counter_addr, Rbumped_count, decrement);
+}
+// Increment the value at some non-fixed (reg + constant) offset from
+// the method data pointer.
+void InterpreterMacroAssembler::increment_mdp_data_at(Register reg,
+int constant,
+Register scratch,
+Register Rbumped_count,
+bool decrement) {
+// Add the constant to reg to get the offset.
+add(scratch, R28_mdx, reg);
+// Then calculate the counter address.
+addi(scratch, scratch, constant);
+increment_mdp_data_at(scratch, Rbumped_count, decrement);
+}
+void InterpreterMacroAssembler::increment_mdp_data_at(Register counter_addr,
+Register Rbumped_count,
+bool decrement) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+// Load the counter.
+ld(Rbumped_count, 0, counter_addr);
+if (decrement) {
+// Decrement the register. Set condition codes.
+addi(Rbumped_count, Rbumped_count, - DataLayout::counter_increment);
+// Store the decremented counter, if it is still negative.
+std(Rbumped_count, 0, counter_addr);
+// Note: add/sub overflow check are not ported, since 64 bit
+// calculation should never overflow.
+} else {
+// Increment the register. Set carry flag.
+addi(Rbumped_count, Rbumped_count, DataLayout::counter_increment);
+// Store the incremented counter.
+std(Rbumped_count, 0, counter_addr);
+}
+}
+// Set a flag value at the current method data pointer position.
+void InterpreterMacroAssembler::set_mdp_flag_at(int flag_constant,
+Register scratch) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+// Load the data header.
+lbz(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx);
+// Set the flag.
+ori(scratch, scratch, flag_constant);
+// Store the modified header.
+stb(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx);
+}
+// Test the location at some offset from the method data pointer.
+// If it is not equal to value, branch to the not_equal_continue Label.
+void InterpreterMacroAssembler::test_mdp_data_at(int offset,
+Register value,
+Label& not_equal_continue,
+Register test_out) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+ld(test_out, offset, R28_mdx);
+cmpd(CCR0,  value, test_out);
+bne(CCR0, not_equal_continue);
+}
+// Update the method data pointer by the displacement located at some fixed
+// offset from the method data pointer.
+void InterpreterMacroAssembler::update_mdp_by_offset(int offset_of_disp,
+Register scratch) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+ld(scratch, offset_of_disp, R28_mdx);
+add(R28_mdx, scratch, R28_mdx);
+}
+// Update the method data pointer by the displacement located at the
+// offset (reg + offset_of_disp).
+void InterpreterMacroAssembler::update_mdp_by_offset(Register reg,
+int offset_of_disp,
+Register scratch) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+add(scratch, reg, R28_mdx);
+ld(scratch, offset_of_disp, scratch);
+add(R28_mdx, scratch, R28_mdx);
+}
+// Update the method data pointer by a simple constant displacement.
+void InterpreterMacroAssembler::update_mdp_by_constant(int constant) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+addi(R28_mdx, R28_mdx, constant);
+}
+// Update the method data pointer for a _ret bytecode whose target
+// was not among our cached targets.
+void InterpreterMacroAssembler::update_mdp_for_ret(TosState state,
+Register return_bci) {
+assert(ProfileInterpreter, "must be profiling interpreter");
+push(state);
+assert(return_bci->is_nonvolatile(), "need to protect return_bci");
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
+pop(state);
+}
+// Increments the backedge counter.
+// Returns backedge counter + invocation counter in Rdst.
+void InterpreterMacroAssembler::increment_backedge_counter(const Register Rcounters, const Register Rdst,
+const Register Rtmp1, Register Rscratch) {
+assert(UseCompiler, "incrementing must be useful");
+assert_different_registers(Rdst, Rtmp1);
+const Register invocation_counter = Rtmp1;
+const Register counter = Rdst;
+// TODO: PPC port: assert(4 == InvocationCounter::sz_counter(), "unexpected field size.");
+// Load backedge counter.
+lwz(counter, in_bytes(MethodCounters::backedge_counter_offset()) +
+in_bytes(InvocationCounter::counter_offset()), Rcounters);
+// Load invocation counter.
+lwz(invocation_counter, in_bytes(MethodCounters::invocation_counter_offset()) +
+in_bytes(InvocationCounter::counter_offset()), Rcounters);
+// Add the delta to the backedge counter.
+addi(counter, counter, InvocationCounter::count_increment);
+// Mask the invocation counter.
+andi(invocation_counter, invocation_counter, InvocationCounter::count_mask_value);
+// Store new counter value.
+stw(counter, in_bytes(MethodCounters::backedge_counter_offset()) +
+in_bytes(InvocationCounter::counter_offset()), Rcounters);
+// Return invocation counter + backedge counter.
+add(counter, counter, invocation_counter);
+}
+// Count a taken branch in the bytecodes.
+void InterpreterMacroAssembler::profile_taken_branch(Register scratch, Register bumped_count) {
+if (ProfileInterpreter) {
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+// We are taking a branch. Increment the taken count.
+increment_mdp_data_at(in_bytes(JumpData::taken_offset()), scratch, bumped_count);
+// The method data pointer needs to be updated to reflect the new target.
+update_mdp_by_offset(in_bytes(JumpData::displacement_offset()), scratch);
+bind (profile_continue);
+}
+}
+// Count a not-taken branch in the bytecodes.
+void InterpreterMacroAssembler::profile_not_taken_branch(Register scratch1, Register scratch2) {
+if (ProfileInterpreter) {
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+// We are taking a branch. Increment the not taken count.
+increment_mdp_data_at(in_bytes(BranchData::not_taken_offset()), scratch1, scratch2);
+// The method data pointer needs to be updated to correspond to the
+// next bytecode.
+update_mdp_by_constant(in_bytes(BranchData::branch_data_size()));
+bind (profile_continue);
+}
+}
+// Count a non-virtual call in the bytecodes.
+void InterpreterMacroAssembler::profile_call(Register scratch1, Register scratch2) {
+if (ProfileInterpreter) {
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+// We are making a call. Increment the count.
+increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2);
+// The method data pointer needs to be updated to reflect the new target.
+update_mdp_by_constant(in_bytes(CounterData::counter_data_size()));
+bind (profile_continue);
+}
+}
+// Count a final call in the bytecodes.
+void InterpreterMacroAssembler::profile_final_call(Register scratch1, Register scratch2) {
+if (ProfileInterpreter) {
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+// We are making a call. Increment the count.
+increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2);
+// The method data pointer needs to be updated to reflect the new target.
+update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
+bind (profile_continue);
+}
+}
+// Count a virtual call in the bytecodes.
+void InterpreterMacroAssembler::profile_virtual_call(Register Rreceiver,
+Register Rscratch1,
+Register Rscratch2,
+bool receiver_can_be_null) {
+if (!ProfileInterpreter) { return; }
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+Label skip_receiver_profile;
+if (receiver_can_be_null) {
+Label not_null;
+cmpdi(CCR0, Rreceiver, 0);
+bne(CCR0, not_null);
+// We are making a call. Increment the count for null receiver.
+increment_mdp_data_at(in_bytes(CounterData::count_offset()), Rscratch1, Rscratch2);
+b(skip_receiver_profile);
+bind(not_null);
+}
+// Record the receiver type.
+record_klass_in_profile(Rreceiver, Rscratch1, Rscratch2, true);
+bind(skip_receiver_profile);
+// The method data pointer needs to be updated to reflect the new target.
+update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
+bind (profile_continue);
+}
+void InterpreterMacroAssembler::profile_typecheck(Register Rklass, Register Rscratch1, Register Rscratch2) {
+if (ProfileInterpreter) {
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+int mdp_delta = in_bytes(BitData::bit_data_size());
+if (TypeProfileCasts) {
+mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
+// Record the object type.
+record_klass_in_profile(Rklass, Rscratch1, Rscratch2, false);
+}
+// The method data pointer needs to be updated.
+update_mdp_by_constant(mdp_delta);
+bind (profile_continue);
+}
+}
+void InterpreterMacroAssembler::profile_typecheck_failed(Register Rscratch1, Register Rscratch2) {
+if (ProfileInterpreter && TypeProfileCasts) {
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+int count_offset = in_bytes(CounterData::count_offset());
+// Back up the address, since we have already bumped the mdp.
+count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
+// *Decrement* the counter. We expect to see zero or small negatives.
+increment_mdp_data_at(count_offset, Rscratch1, Rscratch2, true);
+bind (profile_continue);
+}
+}
+// Count a ret in the bytecodes.
+void InterpreterMacroAssembler::profile_ret(TosState state, Register return_bci,
+Register scratch1, Register scratch2) {
+if (ProfileInterpreter) {
+Label profile_continue;
+uint row;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+// Update the total ret count.
+increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2 );
+for (row = 0; row < RetData::row_limit(); row++) {
+Label next_test;
+// See if return_bci is equal to bci[n]:
+test_mdp_data_at(in_bytes(RetData::bci_offset(row)), return_bci, next_test, scratch1);
+// return_bci is equal to bci[n]. Increment the count.
+increment_mdp_data_at(in_bytes(RetData::bci_count_offset(row)), scratch1, scratch2);
+// The method data pointer needs to be updated to reflect the new target.
+update_mdp_by_offset(in_bytes(RetData::bci_displacement_offset(row)), scratch1);
+b(profile_continue);
+bind(next_test);
+}
+update_mdp_for_ret(state, return_bci);
+bind (profile_continue);
+}
+}
+// Count the default case of a switch construct.
+void InterpreterMacroAssembler::profile_switch_default(Register scratch1,  Register scratch2) {
+if (ProfileInterpreter) {
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+// Update the default case count
+increment_mdp_data_at(in_bytes(MultiBranchData::default_count_offset()),
+scratch1, scratch2);
+// The method data pointer needs to be updated.
+update_mdp_by_offset(in_bytes(MultiBranchData::default_displacement_offset()),
+scratch1);
+bind (profile_continue);
+}
+}
+// Count the index'th case of a switch construct.
+void InterpreterMacroAssembler::profile_switch_case(Register index,
+Register scratch1,
+Register scratch2,
+Register scratch3) {
+if (ProfileInterpreter) {
+assert_different_registers(index, scratch1, scratch2, scratch3);
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+// Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes().
+li(scratch3, in_bytes(MultiBranchData::case_array_offset()));
+assert (in_bytes(MultiBranchData::per_case_size()) == 16, "so that shladd works");
+sldi(scratch1, index, exact_log2(in_bytes(MultiBranchData::per_case_size())));
+add(scratch1, scratch1, scratch3);
+// Update the case count.
+increment_mdp_data_at(scratch1, in_bytes(MultiBranchData::relative_count_offset()), scratch2, scratch3);
+// The method data pointer needs to be updated.
+update_mdp_by_offset(scratch1, in_bytes(MultiBranchData::relative_displacement_offset()), scratch2);
+bind (profile_continue);
+}
+}
+void InterpreterMacroAssembler::profile_null_seen(Register Rscratch1, Register Rscratch2) {
+if (ProfileInterpreter) {
+assert_different_registers(Rscratch1, Rscratch2);
+Label profile_continue;
+// If no method data exists, go to profile_continue.
+test_method_data_pointer(profile_continue);
+set_mdp_flag_at(BitData::null_seen_byte_constant(), Rscratch1);
+// The method data pointer needs to be updated.
+int mdp_delta = in_bytes(BitData::bit_data_size());
+if (TypeProfileCasts) {
+mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
+}
+update_mdp_by_constant(mdp_delta);
+bind (profile_continue);
+}
+}
+void InterpreterMacroAssembler::record_klass_in_profile(Register Rreceiver,
+Register Rscratch1, Register Rscratch2,
+bool is_virtual_call) {
+assert(ProfileInterpreter, "must be profiling");
+assert_different_registers(Rreceiver, Rscratch1, Rscratch2);
+Label done;
+record_klass_in_profile_helper(Rreceiver, Rscratch1, Rscratch2, 0, done, is_virtual_call);
+bind (done);
+}
+void InterpreterMacroAssembler::record_klass_in_profile_helper(
+Register receiver, Register scratch1, Register scratch2,
+int start_row, Label& done, bool is_virtual_call) {
+if (TypeProfileWidth == 0) {
+if (is_virtual_call) {
+increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2);
+}
+return;
+}
+int last_row = VirtualCallData::row_limit() - 1;
+assert(start_row <= last_row, "must be work left to do");
+// Test this row for both the receiver and for null.
+// Take any of three different outcomes:
+//   1. found receiver => increment count and goto done
+//   2. found null => keep looking for case 1, maybe allocate this cell
+//   3. found something else => keep looking for cases 1 and 2
+// Case 3 is handled by a recursive call.
+for (int row = start_row; row <= last_row; row++) {
+Label next_test;
+bool test_for_null_also = (row == start_row);
+// See if the receiver is receiver[n].
+int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
+test_mdp_data_at(recvr_offset, receiver, next_test, scratch1);
+// delayed()->tst(scratch);
+// The receiver is receiver[n]. Increment count[n].
+int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
+increment_mdp_data_at(count_offset, scratch1, scratch2);
+b(done);
+bind(next_test);
+if (test_for_null_also) {
+Label found_null;
+// Failed the equality check on receiver[n]... Test for null.
+if (start_row == last_row) {
+// The only thing left to do is handle the null case.
+if (is_virtual_call) {
+// Scratch1 contains test_out from test_mdp_data_at.
+cmpdi(CCR0, scratch1, 0);
+beq(CCR0, found_null);
+// Receiver did not match any saved receiver and there is no empty row for it.
+// Increment total counter to indicate polymorphic case.
+increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2);
+b(done);
+bind(found_null);
+} else {
+cmpdi(CCR0, scratch1, 0);
+bne(CCR0, done);
+}
+break;
+}
+// Since null is rare, make it be the branch-taken case.
+cmpdi(CCR0, scratch1, 0);
+beq(CCR0, found_null);
+// Put all the "Case 3" tests here.
+record_klass_in_profile_helper(receiver, scratch1, scratch2, start_row + 1, done, is_virtual_call);
+// Found a null. Keep searching for a matching receiver,
+// but remember that this is an empty (unused) slot.
+bind(found_null);
+}
+}
+// In the fall-through case, we found no matching receiver, but we
+// observed the receiver[start_row] is NULL.
+// Fill in the receiver field and increment the count.
+int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
+set_mdp_data_at(recvr_offset, receiver);
+int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
+li(scratch1, DataLayout::counter_increment);
+set_mdp_data_at(count_offset, scratch1);
+if (start_row > 0) {
+b(done);
+}
+}
+// Argument and return type profilig.
+// kills: tmp, tmp2, R0, CR0, CR1
+void InterpreterMacroAssembler::profile_obj_type(Register obj, Register mdo_addr_base,
+RegisterOrConstant mdo_addr_offs,
+Register tmp, Register tmp2) {
+Label do_nothing, do_update;
+// tmp2 = obj is allowed
+assert_different_registers(obj, mdo_addr_base, tmp, R0);
+assert_different_registers(tmp2, mdo_addr_base, tmp, R0);
+const Register klass = tmp2;
+verify_oop(obj);
+ld(tmp, mdo_addr_offs, mdo_addr_base);
+// Set null_seen if obj is 0.
+cmpdi(CCR0, obj, 0);
+ori(R0, tmp, TypeEntries::null_seen);
+beq(CCR0, do_update);
+load_klass(klass, obj);
+clrrdi(R0, tmp, exact_log2(-TypeEntries::type_klass_mask));
+// Basically same as andi(R0, tmp, TypeEntries::type_klass_mask);
+cmpd(CCR1, R0, klass);
+// Klass seen before, nothing to do (regardless of unknown bit).
+//beq(CCR1, do_nothing);
+andi_(R0, klass, TypeEntries::type_unknown);
+// Already unknown. Nothing to do anymore.
+//bne(CCR0, do_nothing);
+crorc(CCR0, Assembler::equal, CCR1, Assembler::equal); // cr0 eq = cr1 eq or cr0 ne
+beq(CCR0, do_nothing);
+clrrdi_(R0, tmp, exact_log2(-TypeEntries::type_mask));
+orr(R0, klass, tmp); // Combine klass and null_seen bit (only used if (tmp & type_mask)==0).
+beq(CCR0, do_update); // First time here. Set profile type.
+// Different than before. Cannot keep accurate profile.
+ori(R0, tmp, TypeEntries::type_unknown);
+bind(do_update);
+// update profile
+std(R0, mdo_addr_offs, mdo_addr_base);
+align(32, 12);
+bind(do_nothing);
+}
+void InterpreterMacroAssembler::profile_arguments_type(Register callee,
+Register tmp1, Register tmp2,
+bool is_virtual) {
+if (!ProfileInterpreter) {
+return;
+}
+assert_different_registers(callee, tmp1, tmp2, R28_mdx);
+if (MethodData::profile_arguments() || MethodData::profile_return()) {
+Label profile_continue;
+test_method_data_pointer(profile_continue);
+int off_to_start = is_virtual ?
+in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
+lbz(tmp1, in_bytes(DataLayout::tag_offset()) - off_to_start, R28_mdx);
+cmpwi(CCR0, tmp1, is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
+bne(CCR0, profile_continue);
+if (MethodData::profile_arguments()) {
+Label done;
+int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
+add(R28_mdx, off_to_args, R28_mdx);
+for (int i = 0; i < TypeProfileArgsLimit; i++) {
+if (i > 0 || MethodData::profile_return()) {
+// If return value type is profiled we may have no argument to profile.
+ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx);
+cmpdi(CCR0, tmp1, (i+1)*TypeStackSlotEntries::per_arg_count());
+addi(tmp1, tmp1, -i*TypeStackSlotEntries::per_arg_count());
+blt(CCR0, done);
+}
+ld(tmp1, in_bytes(Method::const_offset()), callee);
+lhz(tmp1, in_bytes(ConstMethod::size_of_parameters_offset()), tmp1);
+// Stack offset o (zero based) from the start of the argument
+// list, for n arguments translates into offset n - o - 1 from
+// the end of the argument list. But there's an extra slot at
+// the top of the stack. So the offset is n - o from Lesp.
+ld(tmp2, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args, R28_mdx);
+subf(tmp1, tmp2, tmp1);
+sldi(tmp1, tmp1, Interpreter::logStackElementSize);
+ldx(tmp1, tmp1, R15_esp);
+profile_obj_type(tmp1, R28_mdx, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args, tmp2, tmp1);
+int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
+addi(R28_mdx, R28_mdx, to_add);
+off_to_args += to_add;
+}
+if (MethodData::profile_return()) {
+ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx);
+addi(tmp1, tmp1, -TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
+}
+bind(done);
+if (MethodData::profile_return()) {
+// We're right after the type profile for the last
+// argument. tmp1 is the number of cells left in the
+// CallTypeData/VirtualCallTypeData to reach its end. Non null
+// if there's a return to profile.
+assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(),
+"can't move past ret type");
+sldi(tmp1, tmp1, exact_log2(DataLayout::cell_size));
+add(R28_mdx, tmp1, R28_mdx);
+}
+} else {
+assert(MethodData::profile_return(), "either profile call args or call ret");
+update_mdp_by_constant(in_bytes(TypeEntriesAtCall::return_only_size()));
+}
+// Mdp points right after the end of the
+// CallTypeData/VirtualCallTypeData, right after the cells for the
+// return value type if there's one.
+align(32, 12);
+bind(profile_continue);
+}
+}
+void InterpreterMacroAssembler::profile_return_type(Register ret, Register tmp1, Register tmp2) {
+assert_different_registers(ret, tmp1, tmp2);
+if (ProfileInterpreter && MethodData::profile_return()) {
+Label profile_continue;
+test_method_data_pointer(profile_continue);
+if (MethodData::profile_return_jsr292_only()) {
+// If we don't profile all invoke bytecodes we must make sure
+// it's a bytecode we indeed profile. We can't go back to the
+// begining of the ProfileData we intend to update to check its
+// type because we're right after it and we don't known its
+// length.
+lbz(tmp1, 0, R14_bcp);
+lbz(tmp2, Method::intrinsic_id_offset_in_bytes(), R19_method);
+cmpwi(CCR0, tmp1, Bytecodes::_invokedynamic);
+cmpwi(CCR1, tmp1, Bytecodes::_invokehandle);
+cror(CCR0, Assembler::equal, CCR1, Assembler::equal);
+cmpwi(CCR1, tmp2, vmIntrinsics::_compiledLambdaForm);
+cror(CCR0, Assembler::equal, CCR1, Assembler::equal);
+bne(CCR0, profile_continue);
+}
+profile_obj_type(ret, R28_mdx, -in_bytes(ReturnTypeEntry::size()), tmp1, tmp2);
+align(32, 12);
+bind(profile_continue);
+}
+}
+void InterpreterMacroAssembler::profile_parameters_type(Register tmp1, Register tmp2,
+Register tmp3, Register tmp4) {
+if (ProfileInterpreter && MethodData::profile_parameters()) {
+Label profile_continue, done;
+test_method_data_pointer(profile_continue);
+// Load the offset of the area within the MDO used for
+// parameters. If it's negative we're not profiling any parameters.
+lwz(tmp1, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()), R28_mdx);
+cmpwi(CCR0, tmp1, 0);
+blt(CCR0, profile_continue);
+// Compute a pointer to the area for parameters from the offset
+// and move the pointer to the slot for the last
+// parameters. Collect profiling from last parameter down.
+// mdo start + parameters offset + array length - 1
+// Pointer to the parameter area in the MDO.
+const Register mdp = tmp1;
+add(mdp, tmp1, R28_mdx);
+// Offset of the current profile entry to update.
+const Register entry_offset = tmp2;
+// entry_offset = array len in number of cells
+ld(entry_offset, in_bytes(ArrayData::array_len_offset()), mdp);
+int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
+assert(off_base % DataLayout::cell_size == 0, "should be a number of cells");
+// entry_offset (number of cells)  = array len - size of 1 entry + offset of the stack slot field
+addi(entry_offset, entry_offset, -TypeStackSlotEntries::per_arg_count() + (off_base / DataLayout::cell_size));
+// entry_offset in bytes
+sldi(entry_offset, entry_offset, exact_log2(DataLayout::cell_size));
+Label loop;
+align(32, 12);
+bind(loop);
+// Load offset on the stack from the slot for this parameter.
+ld(tmp3, entry_offset, mdp);
+sldi(tmp3, tmp3, Interpreter::logStackElementSize);
+neg(tmp3, tmp3);
+// Read the parameter from the local area.
+ldx(tmp3, tmp3, R18_locals);
+// Make entry_offset now point to the type field for this parameter.
+int type_base = in_bytes(ParametersTypeData::type_offset(0));
+assert(type_base > off_base, "unexpected");
+addi(entry_offset, entry_offset, type_base - off_base);
+// Profile the parameter.
+profile_obj_type(tmp3, mdp, entry_offset, tmp4, tmp3);
+// Go to next parameter.
+int delta = TypeStackSlotEntries::per_arg_count() * DataLayout::cell_size + (type_base - off_base);
+cmpdi(CCR0, entry_offset, off_base + delta);
+addi(entry_offset, entry_offset, -delta);
+bge(CCR0, loop);
+align(32, 12);
+bind(profile_continue);
+}
+}
+// Add a InterpMonitorElem to stack (see frame_sparc.hpp).
+void InterpreterMacroAssembler::add_monitor_to_stack(bool stack_is_empty, Register Rtemp1, Register Rtemp2) {
+// Very-local scratch registers.
+const Register esp  = Rtemp1;
+const Register slot = Rtemp2;
+// Extracted monitor_size.
+int monitor_size = frame::interpreter_frame_monitor_size_in_bytes();
+assert(Assembler::is_aligned((unsigned int)monitor_size,
+(unsigned int)frame::alignment_in_bytes),
+"size of a monitor must respect alignment of SP");
+resize_frame(-monitor_size, /*temp*/esp); // Allocate space for new monitor
+std(R1_SP, _ijava_state_neg(top_frame_sp), esp); // esp contains fp
+// Shuffle expression stack down. Recall that stack_base points
+// just above the new expression stack bottom. Old_tos and new_tos
+// are used to scan thru the old and new expression stacks.
+if (!stack_is_empty) {
+Label copy_slot, copy_slot_finished;
+const Register n_slots = slot;
+addi(esp, R15_esp, Interpreter::stackElementSize); // Point to first element (pre-pushed stack).
+subf(n_slots, esp, R26_monitor);
+srdi_(n_slots, n_slots, LogBytesPerWord);          // Compute number of slots to copy.
+assert(LogBytesPerWord == 3, "conflicts assembler instructions");
+beq(CCR0, copy_slot_finished);                     // Nothing to copy.
+mtctr(n_slots);
+// loop
+bind(copy_slot);
+ld(slot, 0, esp);              // Move expression stack down.
+std(slot, -monitor_size, esp); // distance = monitor_size
+addi(esp, esp, BytesPerWord);
+bdnz(copy_slot);
+bind(copy_slot_finished);
+}
+addi(R15_esp, R15_esp, -monitor_size);
+addi(R26_monitor, R26_monitor, -monitor_size);
+// Restart interpreter
+}
+// ============================================================================
+// Java locals access
+// Load a local variable at index in Rindex into register Rdst_value.
+// Also puts address of local into Rdst_address as a service.
+// Kills:
+//   - Rdst_value
+//   - Rdst_address
+void InterpreterMacroAssembler::load_local_int(Register Rdst_value, Register Rdst_address, Register Rindex) {
+sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
+subf(Rdst_address, Rdst_address, R18_locals);
+lwz(Rdst_value, 0, Rdst_address);
+}
+// Load a local variable at index in Rindex into register Rdst_value.
+// Also puts address of local into Rdst_address as a service.
+// Kills:
+//   - Rdst_value
+//   - Rdst_address
+void InterpreterMacroAssembler::load_local_long(Register Rdst_value, Register Rdst_address, Register Rindex) {
+sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
+subf(Rdst_address, Rdst_address, R18_locals);
+ld(Rdst_value, -8, Rdst_address);
+}
+// Load a local variable at index in Rindex into register Rdst_value.
+// Also puts address of local into Rdst_address as a service.
+// Input:
+//   - Rindex:      slot nr of local variable
+// Kills:
+//   - Rdst_value
+//   - Rdst_address
+void InterpreterMacroAssembler::load_local_ptr(Register Rdst_value,
+Register Rdst_address,
+Register Rindex) {
+sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
+subf(Rdst_address, Rdst_address, R18_locals);
+ld(Rdst_value, 0, Rdst_address);
+}
+// Load a local variable at index in Rindex into register Rdst_value.
+// Also puts address of local into Rdst_address as a service.
+// Kills:
+//   - Rdst_value
+//   - Rdst_address
+void InterpreterMacroAssembler::load_local_float(FloatRegister Rdst_value,
+Register Rdst_address,
+Register Rindex) {
+sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
+subf(Rdst_address, Rdst_address, R18_locals);
+lfs(Rdst_value, 0, Rdst_address);
+}
+// Load a local variable at index in Rindex into register Rdst_value.
+// Also puts address of local into Rdst_address as a service.
+// Kills:
+//   - Rdst_value
+//   - Rdst_address
+void InterpreterMacroAssembler::load_local_double(FloatRegister Rdst_value,
+Register Rdst_address,
+Register Rindex) {
+sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
+subf(Rdst_address, Rdst_address, R18_locals);
+lfd(Rdst_value, -8, Rdst_address);
+}
+// Store an int value at local variable slot Rindex.
+// Kills:
+//   - Rindex
+void InterpreterMacroAssembler::store_local_int(Register Rvalue, Register Rindex) {
+sldi(Rindex, Rindex, Interpreter::logStackElementSize);
+subf(Rindex, Rindex, R18_locals);
+stw(Rvalue, 0, Rindex);
+}
+// Store a long value at local variable slot Rindex.
+// Kills:
+//   - Rindex
+void InterpreterMacroAssembler::store_local_long(Register Rvalue, Register Rindex) {
+sldi(Rindex, Rindex, Interpreter::logStackElementSize);
+subf(Rindex, Rindex, R18_locals);
+std(Rvalue, -8, Rindex);
+}
+// Store an oop value at local variable slot Rindex.
+// Kills:
+//   - Rindex
+void InterpreterMacroAssembler::store_local_ptr(Register Rvalue, Register Rindex) {
+sldi(Rindex, Rindex, Interpreter::logStackElementSize);
+subf(Rindex, Rindex, R18_locals);
+std(Rvalue, 0, Rindex);
+}
+// Store an int value at local variable slot Rindex.
+// Kills:
+//   - Rindex
+void InterpreterMacroAssembler::store_local_float(FloatRegister Rvalue, Register Rindex) {
+sldi(Rindex, Rindex, Interpreter::logStackElementSize);
+subf(Rindex, Rindex, R18_locals);
+stfs(Rvalue, 0, Rindex);
+}
+// Store an int value at local variable slot Rindex.
+// Kills:
+//   - Rindex
+void InterpreterMacroAssembler::store_local_double(FloatRegister Rvalue, Register Rindex) {
+sldi(Rindex, Rindex, Interpreter::logStackElementSize);
+subf(Rindex, Rindex, R18_locals);
+stfd(Rvalue, -8, Rindex);
+}
+// Read pending exception from thread and jump to interpreter.
+// Throw exception entry if one if pending. Fall through otherwise.
+void InterpreterMacroAssembler::check_and_forward_exception(Register Rscratch1, Register Rscratch2) {
+assert_different_registers(Rscratch1, Rscratch2, R3);
+Register Rexception = Rscratch1;
+Register Rtmp       = Rscratch2;
+Label Ldone;
+// Get pending exception oop.
+ld(Rexception, thread_(pending_exception));
+cmpdi(CCR0, Rexception, 0);
+beq(CCR0, Ldone);
+li(Rtmp, 0);
+mr_if_needed(R3, Rexception);
+std(Rtmp, thread_(pending_exception)); // Clear exception in thread
+if (Interpreter::rethrow_exception_entry() != NULL) {
+// Already got entry address.
+load_dispatch_table(Rtmp, (address*)Interpreter::rethrow_exception_entry());
+} else {
+// Dynamically load entry address.
+int simm16_rest = load_const_optimized(Rtmp, &Interpreter::_rethrow_exception_entry, R0, true);
+ld(Rtmp, simm16_rest, Rtmp);
+}
+mtctr(Rtmp);
+save_interpreter_state(Rtmp);
+bctr();
+align(32, 12);
+bind(Ldone);
+}
+void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, bool check_exceptions) {
+save_interpreter_state(R11_scratch1);
+MacroAssembler::call_VM(oop_result, entry_point, false);
+restore_interpreter_state(R11_scratch1, /*bcp_and_mdx_only*/ true);
+check_and_handle_popframe(R11_scratch1);
+check_and_handle_earlyret(R11_scratch1);
+// Now check exceptions manually.
+if (check_exceptions) {
+check_and_forward_exception(R11_scratch1, R12_scratch2);
+}
+}
+void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point,
+Register arg_1, bool check_exceptions) {
+// ARG1 is reserved for the thread.
+mr_if_needed(R4_ARG2, arg_1);
+call_VM(oop_result, entry_point, check_exceptions);
+}
+void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point,
+Register arg_1, Register arg_2,
+bool check_exceptions) {
+// ARG1 is reserved for the thread.
+mr_if_needed(R4_ARG2, arg_1);
+assert(arg_2 != R4_ARG2, "smashed argument");
+mr_if_needed(R5_ARG3, arg_2);
+call_VM(oop_result, entry_point, check_exceptions);
+}
+void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point,
+Register arg_1, Register arg_2, Register arg_3,
+bool check_exceptions) {
+// ARG1 is reserved for the thread.
+mr_if_needed(R4_ARG2, arg_1);
+assert(arg_2 != R4_ARG2, "smashed argument");
+mr_if_needed(R5_ARG3, arg_2);
+assert(arg_3 != R4_ARG2 && arg_3 != R5_ARG3, "smashed argument");
+mr_if_needed(R6_ARG4, arg_3);
+call_VM(oop_result, entry_point, check_exceptions);
+}
+void InterpreterMacroAssembler::save_interpreter_state(Register scratch) {
+ld(scratch, 0, R1_SP);
+std(R15_esp, _ijava_state_neg(esp), scratch);
+std(R14_bcp, _ijava_state_neg(bcp), scratch);
+std(R26_monitor, _ijava_state_neg(monitors), scratch);
+if (ProfileInterpreter) { std(R28_mdx, _ijava_state_neg(mdx), scratch); }
+// Other entries should be unchanged.
+}
+void InterpreterMacroAssembler::restore_interpreter_state(Register scratch, bool bcp_and_mdx_only) {
+ld(scratch, 0, R1_SP);
+ld(R14_bcp, _ijava_state_neg(bcp), scratch); // Changed by VM code (exception).
+if (ProfileInterpreter) { ld(R28_mdx, _ijava_state_neg(mdx), scratch); } // Changed by VM code.
+if (!bcp_and_mdx_only) {
+// Following ones are Metadata.
+ld(R19_method, _ijava_state_neg(method), scratch);
+ld(R27_constPoolCache, _ijava_state_neg(cpoolCache), scratch);
+// Following ones are stack addresses and don't require reload.
+ld(R15_esp, _ijava_state_neg(esp), scratch);
+ld(R18_locals, _ijava_state_neg(locals), scratch);
+ld(R26_monitor, _ijava_state_neg(monitors), scratch);
+}
+#ifdef ASSERT
+{
+Label Lok;
+subf(R0, R1_SP, scratch);
+cmpdi(CCR0, R0, frame::abi_reg_args_size + frame::ijava_state_size);
+bge(CCR0, Lok);
+stop("frame too small (restore istate)", 0x5432);
+bind(Lok);
+}
+{
+Label Lok;
+ld(R0, _ijava_state_neg(ijava_reserved), scratch);
+cmpdi(CCR0, R0, 0x5afe);
+beq(CCR0, Lok);
+stop("frame corrupted (restore istate)", 0x5afe);
+bind(Lok);
+}
+#endif
+}
+void InterpreterMacroAssembler::get_method_counters(Register method,
+Register Rcounters,
+Label& skip) {
+BLOCK_COMMENT("Load and ev. allocate counter object {");
+Label has_counters;
+ld(Rcounters, in_bytes(Method::method_counters_offset()), method);
+cmpdi(CCR0, Rcounters, 0);
+bne(CCR0, has_counters);
+call_VM(noreg, CAST_FROM_FN_PTR(address,
+InterpreterRuntime::build_method_counters), method, false);
+ld(Rcounters, in_bytes(Method::method_counters_offset()), method);
+cmpdi(CCR0, Rcounters, 0);
+beq(CCR0, skip); // No MethodCounters, OutOfMemory.
+BLOCK_COMMENT("} Load and ev. allocate counter object");
+bind(has_counters);
+}
+void InterpreterMacroAssembler::increment_invocation_counter(Register Rcounters,
+Register iv_be_count,
+Register Rtmp_r0) {
+assert(UseCompiler || LogTouchedMethods, "incrementing must be useful");
+Register invocation_count = iv_be_count;
+Register backedge_count   = Rtmp_r0;
+int delta = InvocationCounter::count_increment;
+// Load each counter in a register.
+//  ld(inv_counter, Rtmp);
+//  ld(be_counter, Rtmp2);
+int inv_counter_offset = in_bytes(MethodCounters::invocation_counter_offset() +
+InvocationCounter::counter_offset());
+int be_counter_offset  = in_bytes(MethodCounters::backedge_counter_offset() +
+InvocationCounter::counter_offset());
+BLOCK_COMMENT("Increment profiling counters {");
+// Load the backedge counter.
+lwz(backedge_count, be_counter_offset, Rcounters); // is unsigned int
+// Mask the backedge counter.
+andi(backedge_count, backedge_count, InvocationCounter::count_mask_value);
+// Load the invocation counter.
+lwz(invocation_count, inv_counter_offset, Rcounters); // is unsigned int
+// Add the delta to the invocation counter and store the result.
+addi(invocation_count, invocation_count, delta);
+// Store value.
+stw(invocation_count, inv_counter_offset, Rcounters);
+// Add invocation counter + backedge counter.
+add(iv_be_count, backedge_count, invocation_count);
+// Note that this macro must leave the backedge_count + invocation_count in
+// register iv_be_count!
+BLOCK_COMMENT("} Increment profiling counters");
+}
+void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
+if (state == atos) { MacroAssembler::verify_oop(reg); }
+}
+// Local helper function for the verify_oop_or_return_address macro.
+static bool verify_return_address(Method* m, int bci) {
+#ifndef PRODUCT
+address pc = (address)(m->constMethod()) + in_bytes(ConstMethod::codes_offset()) + bci;
+// Assume it is a valid return address if it is inside m and is preceded by a jsr.
+if (!m->contains(pc))                                            return false;
+address jsr_pc;
+jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr);
+if (*jsr_pc == Bytecodes::_jsr   && jsr_pc >= m->code_base())    return true;
+jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr_w);
+if (*jsr_pc == Bytecodes::_jsr_w && jsr_pc >= m->code_base())    return true;
+#endif // PRODUCT
+return false;
+}
+void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
+if (VerifyFPU) {
+unimplemented("verfiyFPU");
+}
+}
+void InterpreterMacroAssembler::verify_oop_or_return_address(Register reg, Register Rtmp) {
+if (!VerifyOops) return;
+// The VM documentation for the astore[_wide] bytecode allows
+// the TOS to be not only an oop but also a return address.
+Label test;
+Label skip;
+// See if it is an address (in the current method):
+const int log2_bytecode_size_limit = 16;
+srdi_(Rtmp, reg, log2_bytecode_size_limit);
+bne(CCR0, test);
+address fd = CAST_FROM_FN_PTR(address, verify_return_address);
+const int nbytes_save = MacroAssembler::num_volatile_regs * 8;
+save_volatile_gprs(R1_SP, -nbytes_save); // except R0
+save_LR_CR(Rtmp); // Save in old frame.
+push_frame_reg_args(nbytes_save, Rtmp);
+load_const_optimized(Rtmp, fd, R0);
+mr_if_needed(R4_ARG2, reg);
+mr(R3_ARG1, R19_method);
+call_c(Rtmp); // call C
+pop_frame();
+restore_LR_CR(Rtmp);
+restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
+b(skip);
+// Perform a more elaborate out-of-line call.
+// Not an address; verify it:
+bind(test);
+verify_oop(reg);
+bind(skip);
+}
+// Inline assembly for:
+//
+// if (thread is in interp_only_mode) {
+//   InterpreterRuntime::post_method_entry();
+// }
+// if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY ) ||
+//     *jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY2)   ) {
+//   SharedRuntime::jvmpi_method_entry(method, receiver);
+// }
+void InterpreterMacroAssembler::notify_method_entry() {
+// JVMTI
+// Whenever JVMTI puts a thread in interp_only_mode, method
+// entry/exit events are sent for that thread to track stack
+// depth. If it is possible to enter interp_only_mode we add
+// the code to check if the event should be sent.
+if (JvmtiExport::can_post_interpreter_events()) {
+Label jvmti_post_done;
+lwz(R0, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
+cmpwi(CCR0, R0, 0);
+beq(CCR0, jvmti_post_done);
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry),
+/*check_exceptions=*/true);
+bind(jvmti_post_done);
+}
+}
+// Inline assembly for:
+//
+// if (thread is in interp_only_mode) {
+//   // save result
+//   InterpreterRuntime::post_method_exit();
+//   // restore result
+// }
+// if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_EXIT)) {
+//   // save result
+//   SharedRuntime::jvmpi_method_exit();
+//   // restore result
+// }
+//
+// Native methods have their result stored in d_tmp and l_tmp.
+// Java methods have their result stored in the expression stack.
+void InterpreterMacroAssembler::notify_method_exit(bool is_native_method, TosState state,
+NotifyMethodExitMode mode, bool check_exceptions) {
+// JVMTI
+// Whenever JVMTI puts a thread in interp_only_mode, method
+// entry/exit events are sent for that thread to track stack
+// depth. If it is possible to enter interp_only_mode we add
+// the code to check if the event should be sent.
+if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
+Label jvmti_post_done;
+lwz(R0, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
+cmpwi(CCR0, R0, 0);
+beq(CCR0, jvmti_post_done);
+if (!is_native_method) { push(state); } // Expose tos to GC.
+call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit),
+/*check_exceptions=*/check_exceptions);
+if (!is_native_method) { pop(state); }
+align(32, 12);
+bind(jvmti_post_done);
+}
+// Dtrace support not implemented.
+}

changeset 47216	71c04702a3d5
parent 46961	c9094b1e5f87
child 47634	6a0c42c40cd1