/*
* Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "asm/macroAssembler.inline.hpp"
#include "gc/shared/barrierSetAssembler.hpp"
#include "interpreter/interp_masm.hpp"
#include "interpreter/interpreter.hpp"
#include "interpreter/interpreterRuntime.hpp"
#include "interpreter/templateTable.hpp"
#include "memory/universe.hpp"
#include "oops/cpCache.hpp"
#include "oops/methodData.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/oop.inline.hpp"
#include "prims/methodHandles.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubRoutines.hpp"
#include "runtime/synchronizer.hpp"
#define __ _masm->
//----------------------------------------------------------------------------------------------------
// Platform-dependent initialization
void TemplateTable::pd_initialize() {
// No arm specific initialization
}
//----------------------------------------------------------------------------------------------------
// Address computation
// local variables
static inline Address iaddress(int n) {
return Address(Rlocals, Interpreter::local_offset_in_bytes(n));
}
static inline Address laddress(int n) { return iaddress(n + 1); }
static inline Address haddress(int n) { return iaddress(n + 0); }
static inline Address faddress(int n) { return iaddress(n); }
static inline Address daddress(int n) { return laddress(n); }
static inline Address aaddress(int n) { return iaddress(n); }
void TemplateTable::get_local_base_addr(Register r, Register index) {
__ sub(r, Rlocals, AsmOperand(index, lsl, Interpreter::logStackElementSize));
}
Address TemplateTable::load_iaddress(Register index, Register scratch) {
return Address(Rlocals, index, lsl, Interpreter::logStackElementSize, basic_offset, sub_offset);
}
Address TemplateTable::load_aaddress(Register index, Register scratch) {
return load_iaddress(index, scratch);
}
Address TemplateTable::load_faddress(Register index, Register scratch) {
#ifdef __SOFTFP__
return load_iaddress(index, scratch);
#else
get_local_base_addr(scratch, index);
return Address(scratch);
#endif // __SOFTFP__
}
Address TemplateTable::load_daddress(Register index, Register scratch) {
get_local_base_addr(scratch, index);
return Address(scratch, Interpreter::local_offset_in_bytes(1));
}
// At top of Java expression stack which may be different than SP.
// It isn't for category 1 objects.
static inline Address at_tos() {
return Address(Rstack_top, Interpreter::expr_offset_in_bytes(0));
}
static inline Address at_tos_p1() {
return Address(Rstack_top, Interpreter::expr_offset_in_bytes(1));
}
static inline Address at_tos_p2() {
return Address(Rstack_top, Interpreter::expr_offset_in_bytes(2));
}
// Loads double/long local into R0_tos_lo/R1_tos_hi with two
// separate ldr instructions (supports nonadjacent values).
// Used for longs in all modes, and for doubles in SOFTFP mode.
void TemplateTable::load_category2_local(Register Rlocal_index, Register tmp) {
const Register Rlocal_base = tmp;
assert_different_registers(Rlocal_index, tmp);
get_local_base_addr(Rlocal_base, Rlocal_index);
__ ldr(R0_tos_lo, Address(Rlocal_base, Interpreter::local_offset_in_bytes(1)));
__ ldr(R1_tos_hi, Address(Rlocal_base, Interpreter::local_offset_in_bytes(0)));
}
// Stores R0_tos_lo/R1_tos_hi to double/long local with two
// separate str instructions (supports nonadjacent values).
// Used for longs in all modes, and for doubles in SOFTFP mode
void TemplateTable::store_category2_local(Register Rlocal_index, Register tmp) {
const Register Rlocal_base = tmp;
assert_different_registers(Rlocal_index, tmp);
get_local_base_addr(Rlocal_base, Rlocal_index);
__ str(R0_tos_lo, Address(Rlocal_base, Interpreter::local_offset_in_bytes(1)));
__ str(R1_tos_hi, Address(Rlocal_base, Interpreter::local_offset_in_bytes(0)));
}
// Returns address of Java array element using temp register as address base.
Address TemplateTable::get_array_elem_addr(BasicType elemType, Register array, Register index, Register temp) {
int logElemSize = exact_log2(type2aelembytes(elemType));
__ add_ptr_scaled_int32(temp, array, index, logElemSize);
return Address(temp, arrayOopDesc::base_offset_in_bytes(elemType));
}
// Returns address of Java array element using temp register as offset from array base
Address TemplateTable::get_array_elem_addr_same_base(BasicType elemType, Register array, Register index, Register temp) {
int logElemSize = exact_log2(type2aelembytes(elemType));
if (logElemSize == 0) {
__ add(temp, index, arrayOopDesc::base_offset_in_bytes(elemType));
} else {
__ mov(temp, arrayOopDesc::base_offset_in_bytes(elemType));
__ add_ptr_scaled_int32(temp, temp, index, logElemSize);
}
return Address(array, temp);
}
//----------------------------------------------------------------------------------------------------
// Condition conversion
AsmCondition convNegCond(TemplateTable::Condition cc) {
switch (cc) {
case TemplateTable::equal : return ne;
case TemplateTable::not_equal : return eq;
case TemplateTable::less : return ge;
case TemplateTable::less_equal : return gt;
case TemplateTable::greater : return le;
case TemplateTable::greater_equal: return lt;
}
ShouldNotReachHere();
return nv;
}
//----------------------------------------------------------------------------------------------------
// Miscelaneous helper routines
// Store an oop (or NULL) at the address described by obj.
// Blows all volatile registers R0-R3, Rtemp, LR).
// Also destroys new_val and obj.base().
static void do_oop_store(InterpreterMacroAssembler* _masm,
Address obj,
Register new_val,
Register tmp1,
Register tmp2,
Register tmp3,
bool is_null,
DecoratorSet decorators = 0) {
assert_different_registers(obj.base(), new_val, tmp1, tmp2, tmp3, noreg);
if (is_null) {
__ store_heap_oop_null(obj, new_val, tmp1, tmp2, tmp3, decorators);
} else {
__ store_heap_oop(obj, new_val, tmp1, tmp2, tmp3, decorators);
}
}
static void do_oop_load(InterpreterMacroAssembler* _masm,
Register dst,
Address obj,
DecoratorSet decorators = 0) {
__ load_heap_oop(dst, obj, noreg, noreg, noreg, decorators);
}
Address TemplateTable::at_bcp(int offset) {
assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
return Address(Rbcp, offset);
}
// Blows volatile registers R0-R3, Rtemp, LR.
void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
int byte_no) {
assert_different_registers(bc_reg, temp_reg);
if (!RewriteBytecodes) return;
Label L_patch_done;
switch (bc) {
case Bytecodes::_fast_aputfield:
case Bytecodes::_fast_bputfield:
case Bytecodes::_fast_zputfield:
case Bytecodes::_fast_cputfield:
case Bytecodes::_fast_dputfield:
case Bytecodes::_fast_fputfield:
case Bytecodes::_fast_iputfield:
case Bytecodes::_fast_lputfield:
case Bytecodes::_fast_sputfield:
{
// We skip bytecode quickening for putfield instructions when
// the put_code written to the constant pool cache is zero.
// This is required so that every execution of this instruction
// calls out to InterpreterRuntime::resolve_get_put to do
// additional, required work.
assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
assert(load_bc_into_bc_reg, "we use bc_reg as temp");
__ get_cache_and_index_and_bytecode_at_bcp(bc_reg, temp_reg, temp_reg, byte_no, 1, sizeof(u2));
__ mov(bc_reg, bc);
__ cbz(temp_reg, L_patch_done); // test if bytecode is zero
}
break;
default:
assert(byte_no == -1, "sanity");
// the pair bytecodes have already done the load.
if (load_bc_into_bc_reg) {
__ mov(bc_reg, bc);
}
}
if (__ can_post_breakpoint()) {
Label L_fast_patch;
// if a breakpoint is present we can't rewrite the stream directly
__ ldrb(temp_reg, at_bcp(0));
__ cmp(temp_reg, Bytecodes::_breakpoint);
__ b(L_fast_patch, ne);
if (bc_reg != R3) {
__ mov(R3, bc_reg);
}
__ mov(R1, Rmethod);
__ mov(R2, Rbcp);
// Let breakpoint table handling rewrite to quicker bytecode
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), R1, R2, R3);
__ b(L_patch_done);
__ bind(L_fast_patch);
}
#ifdef ASSERT
Label L_okay;
__ ldrb(temp_reg, at_bcp(0));
__ cmp(temp_reg, (int)Bytecodes::java_code(bc));
__ b(L_okay, eq);
__ cmp(temp_reg, bc_reg);
__ b(L_okay, eq);
__ stop("patching the wrong bytecode");
__ bind(L_okay);
#endif
// patch bytecode
__ strb(bc_reg, at_bcp(0));
__ bind(L_patch_done);
}
//----------------------------------------------------------------------------------------------------
// Individual instructions
void TemplateTable::nop() {
transition(vtos, vtos);
// nothing to do
}
void TemplateTable::shouldnotreachhere() {
transition(vtos, vtos);
__ stop("shouldnotreachhere bytecode");
}
void TemplateTable::aconst_null() {
transition(vtos, atos);
__ mov(R0_tos, 0);
}
void TemplateTable::iconst(int value) {
transition(vtos, itos);
__ mov_slow(R0_tos, value);
}
void TemplateTable::lconst(int value) {
transition(vtos, ltos);
assert((value == 0) || (value == 1), "unexpected long constant");
__ mov(R0_tos, value);
__ mov(R1_tos_hi, 0);
}
void TemplateTable::fconst(int value) {
transition(vtos, ftos);
const int zero = 0; // 0.0f
const int one = 0x3f800000; // 1.0f
const int two = 0x40000000; // 2.0f
switch(value) {
case 0: __ mov(R0_tos, zero); break;
case 1: __ mov(R0_tos, one); break;
case 2: __ mov(R0_tos, two); break;
default: ShouldNotReachHere(); break;
}
#ifndef __SOFTFP__
__ fmsr(S0_tos, R0_tos);
#endif // !__SOFTFP__
}
void TemplateTable::dconst(int value) {
transition(vtos, dtos);
const int one_lo = 0; // low part of 1.0
const int one_hi = 0x3ff00000; // high part of 1.0
if (value == 0) {
#ifdef __SOFTFP__
__ mov(R0_tos_lo, 0);
__ mov(R1_tos_hi, 0);
#else
__ mov(R0_tmp, 0);
__ fmdrr(D0_tos, R0_tmp, R0_tmp);
#endif // __SOFTFP__
} else if (value == 1) {
__ mov(R0_tos_lo, one_lo);
__ mov_slow(R1_tos_hi, one_hi);
#ifndef __SOFTFP__
__ fmdrr(D0_tos, R0_tos_lo, R1_tos_hi);
#endif // !__SOFTFP__
} else {
ShouldNotReachHere();
}
}
void TemplateTable::bipush() {
transition(vtos, itos);
__ ldrsb(R0_tos, at_bcp(1));
}
void TemplateTable::sipush() {
transition(vtos, itos);
__ ldrsb(R0_tmp, at_bcp(1));
__ ldrb(R1_tmp, at_bcp(2));
__ orr(R0_tos, R1_tmp, AsmOperand(R0_tmp, lsl, BitsPerByte));
}
void TemplateTable::ldc(bool wide) {
transition(vtos, vtos);
Label fastCase, Condy, Done;
const Register Rindex = R1_tmp;
const Register Rcpool = R2_tmp;
const Register Rtags = R3_tmp;
const Register RtagType = R3_tmp;
if (wide) {
__ get_unsigned_2_byte_index_at_bcp(Rindex, 1);
} else {
__ ldrb(Rindex, at_bcp(1));
}
__ get_cpool_and_tags(Rcpool, Rtags);
const int base_offset = ConstantPool::header_size() * wordSize;
const int tags_offset = Array<u1>::base_offset_in_bytes();
// get const type
__ add(Rtemp, Rtags, tags_offset);
__ ldrb(RtagType, Address(Rtemp, Rindex));
volatile_barrier(MacroAssembler::LoadLoad, Rtemp);
// unresolved class - get the resolved class
__ cmp(RtagType, JVM_CONSTANT_UnresolvedClass);
// unresolved class in error (resolution failed) - call into runtime
// so that the same error from first resolution attempt is thrown.
__ cond_cmp(RtagType, JVM_CONSTANT_UnresolvedClassInError, ne);
// resolved class - need to call vm to get java mirror of the class
__ cond_cmp(RtagType, JVM_CONSTANT_Class, ne);
__ b(fastCase, ne);
// slow case - call runtime
__ mov(R1, wide);
call_VM(R0_tos, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), R1);
__ push(atos);
__ b(Done);
// int, float, String
__ bind(fastCase);
__ cmp(RtagType, JVM_CONSTANT_Integer);
__ cond_cmp(RtagType, JVM_CONSTANT_Float, ne);
__ b(Condy, ne);
// itos, ftos
__ add(Rtemp, Rcpool, AsmOperand(Rindex, lsl, LogBytesPerWord));
__ ldr_u32(R0_tos, Address(Rtemp, base_offset));
// floats and ints are placed on stack in the same way, so
// we can use push(itos) to transfer float value without VFP
__ push(itos);
__ b(Done);
__ bind(Condy);
condy_helper(Done);
__ bind(Done);
}
// Fast path for caching oop constants.
void TemplateTable::fast_aldc(bool wide) {
transition(vtos, atos);
int index_size = wide ? sizeof(u2) : sizeof(u1);
Label resolved;
// We are resolved if the resolved reference cache entry contains a
// non-null object (CallSite, etc.)
assert_different_registers(R0_tos, R2_tmp);
__ get_index_at_bcp(R2_tmp, 1, R0_tos, index_size);
__ load_resolved_reference_at_index(R0_tos, R2_tmp);
__ cbnz(R0_tos, resolved);
address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
// first time invocation - must resolve first
__ mov(R1, (int)bytecode());
__ call_VM(R0_tos, entry, R1);
__ bind(resolved);
{ // Check for the null sentinel.
// If we just called the VM, that already did the mapping for us,
// but it's harmless to retry.
Label notNull;
Register result = R0;
Register tmp = R1;
Register rarg = R2;
// Stash null_sentinel address to get its value later
__ mov_slow(rarg, (uintptr_t)Universe::the_null_sentinel_addr());
__ ldr(tmp, Address(rarg));
__ cmp(result, tmp);
__ b(notNull, ne);
__ mov(result, 0); // NULL object reference
__ bind(notNull);
}
if (VerifyOops) {
__ verify_oop(R0_tos);
}
}
void TemplateTable::ldc2_w() {
transition(vtos, vtos);
const Register Rtags = R2_tmp;
const Register Rindex = R3_tmp;
const Register Rcpool = R4_tmp;
const Register Rbase = R5_tmp;
__ get_unsigned_2_byte_index_at_bcp(Rindex, 1);
__ get_cpool_and_tags(Rcpool, Rtags);
const int base_offset = ConstantPool::header_size() * wordSize;
const int tags_offset = Array<u1>::base_offset_in_bytes();
__ add(Rbase, Rcpool, AsmOperand(Rindex, lsl, LogBytesPerWord));
// get type from tags
__ add(Rtemp, Rtags, tags_offset);
__ ldrb(Rtemp, Address(Rtemp, Rindex));
Label Condy, exit;
#ifdef __ABI_HARD__
Label NotDouble;
__ cmp(Rtemp, JVM_CONSTANT_Double);
__ b(NotDouble, ne);
__ ldr_double(D0_tos, Address(Rbase, base_offset));
__ push(dtos);
__ b(exit);
__ bind(NotDouble);
#endif
__ cmp(Rtemp, JVM_CONSTANT_Long);
__ b(Condy, ne);
__ ldr(R0_tos_lo, Address(Rbase, base_offset + 0 * wordSize));
__ ldr(R1_tos_hi, Address(Rbase, base_offset + 1 * wordSize));
__ push(ltos);
__ b(exit);
__ bind(Condy);
condy_helper(exit);
__ bind(exit);
}
void TemplateTable::condy_helper(Label& Done)
{
Register obj = R0_tmp;
Register rtmp = R1_tmp;
Register flags = R2_tmp;
Register off = R3_tmp;
__ mov(rtmp, (int) bytecode());
__ call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc), rtmp);
__ get_vm_result_2(flags, rtmp);
// VMr = obj = base address to find primitive value to push
// VMr2 = flags = (tos, off) using format of CPCE::_flags
__ mov(off, flags);
__ logical_shift_left( off, off, 32 - ConstantPoolCacheEntry::field_index_bits);
__ logical_shift_right(off, off, 32 - ConstantPoolCacheEntry::field_index_bits);
const Address field(obj, off);
__ logical_shift_right(flags, flags, ConstantPoolCacheEntry::tos_state_shift);
// Make sure we don't need to mask flags after the above shift
ConstantPoolCacheEntry::verify_tos_state_shift();
switch (bytecode()) {
case Bytecodes::_ldc:
case Bytecodes::_ldc_w:
{
// tos in (itos, ftos, stos, btos, ctos, ztos)
Label notIntFloat, notShort, notByte, notChar, notBool;
__ cmp(flags, itos);
__ cond_cmp(flags, ftos, ne);
__ b(notIntFloat, ne);
__ ldr(R0_tos, field);
__ push(itos);
__ b(Done);
__ bind(notIntFloat);
__ cmp(flags, stos);
__ b(notShort, ne);
__ ldrsh(R0_tos, field);
__ push(stos);
__ b(Done);
__ bind(notShort);
__ cmp(flags, btos);
__ b(notByte, ne);
__ ldrsb(R0_tos, field);
__ push(btos);
__ b(Done);
__ bind(notByte);
__ cmp(flags, ctos);
__ b(notChar, ne);
__ ldrh(R0_tos, field);
__ push(ctos);
__ b(Done);
__ bind(notChar);
__ cmp(flags, ztos);
__ b(notBool, ne);
__ ldrsb(R0_tos, field);
__ push(ztos);
__ b(Done);
__ bind(notBool);
break;
}
case Bytecodes::_ldc2_w:
{
Label notLongDouble;
__ cmp(flags, ltos);
__ cond_cmp(flags, dtos, ne);
__ b(notLongDouble, ne);
__ add(rtmp, obj, wordSize);
__ ldr(R0_tos_lo, Address(obj, off));
__ ldr(R1_tos_hi, Address(rtmp, off));
__ push(ltos);
__ b(Done);
__ bind(notLongDouble);
break;
}
default:
ShouldNotReachHere();
}
__ stop("bad ldc/condy");
}
void TemplateTable::locals_index(Register reg, int offset) {
__ ldrb(reg, at_bcp(offset));
}
void TemplateTable::iload() {
iload_internal();
}
void TemplateTable::nofast_iload() {
iload_internal(may_not_rewrite);
}
void TemplateTable::iload_internal(RewriteControl rc) {
transition(vtos, itos);
if ((rc == may_rewrite) && __ rewrite_frequent_pairs()) {
Label rewrite, done;
const Register next_bytecode = R1_tmp;
const Register target_bytecode = R2_tmp;
// get next byte
__ ldrb(next_bytecode, at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
// if _iload, wait to rewrite to iload2. We only want to rewrite the
// last two iloads in a pair. Comparing against fast_iload means that
// the next bytecode is neither an iload or a caload, and therefore
// an iload pair.
__ cmp(next_bytecode, Bytecodes::_iload);
__ b(done, eq);
__ cmp(next_bytecode, Bytecodes::_fast_iload);
__ mov(target_bytecode, Bytecodes::_fast_iload2);
__ b(rewrite, eq);
// if _caload, rewrite to fast_icaload
__ cmp(next_bytecode, Bytecodes::_caload);
__ mov(target_bytecode, Bytecodes::_fast_icaload);
__ b(rewrite, eq);
// rewrite so iload doesn't check again.
__ mov(target_bytecode, Bytecodes::_fast_iload);
// rewrite
// R2: fast bytecode
__ bind(rewrite);
patch_bytecode(Bytecodes::_iload, target_bytecode, Rtemp, false);
__ bind(done);
}
// Get the local value into tos
const Register Rlocal_index = R1_tmp;
locals_index(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(R0_tos, local);
}
void TemplateTable::fast_iload2() {
transition(vtos, itos);
const Register Rlocal_index = R1_tmp;
locals_index(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(R0_tos, local);
__ push(itos);
locals_index(Rlocal_index, 3);
local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(R0_tos, local);
}
void TemplateTable::fast_iload() {
transition(vtos, itos);
const Register Rlocal_index = R1_tmp;
locals_index(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(R0_tos, local);
}
void TemplateTable::lload() {
transition(vtos, ltos);
const Register Rlocal_index = R2_tmp;
locals_index(Rlocal_index);
load_category2_local(Rlocal_index, R3_tmp);
}
void TemplateTable::fload() {
transition(vtos, ftos);
const Register Rlocal_index = R2_tmp;
// Get the local value into tos
locals_index(Rlocal_index);
Address local = load_faddress(Rlocal_index, Rtemp);
#ifdef __SOFTFP__
__ ldr(R0_tos, local);
#else
__ ldr_float(S0_tos, local);
#endif // __SOFTFP__
}
void TemplateTable::dload() {
transition(vtos, dtos);
const Register Rlocal_index = R2_tmp;
locals_index(Rlocal_index);
#ifdef __SOFTFP__
load_category2_local(Rlocal_index, R3_tmp);
#else
__ ldr_double(D0_tos, load_daddress(Rlocal_index, Rtemp));
#endif // __SOFTFP__
}
void TemplateTable::aload() {
transition(vtos, atos);
const Register Rlocal_index = R1_tmp;
locals_index(Rlocal_index);
Address local = load_aaddress(Rlocal_index, Rtemp);
__ ldr(R0_tos, local);
}
void TemplateTable::locals_index_wide(Register reg) {
assert_different_registers(reg, Rtemp);
__ ldrb(Rtemp, at_bcp(2));
__ ldrb(reg, at_bcp(3));
__ orr(reg, reg, AsmOperand(Rtemp, lsl, 8));
}
void TemplateTable::wide_iload() {
transition(vtos, itos);
const Register Rlocal_index = R2_tmp;
locals_index_wide(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(R0_tos, local);
}
void TemplateTable::wide_lload() {
transition(vtos, ltos);
const Register Rlocal_index = R2_tmp;
const Register Rlocal_base = R3_tmp;
locals_index_wide(Rlocal_index);
load_category2_local(Rlocal_index, R3_tmp);
}
void TemplateTable::wide_fload() {
transition(vtos, ftos);
const Register Rlocal_index = R2_tmp;
locals_index_wide(Rlocal_index);
Address local = load_faddress(Rlocal_index, Rtemp);
#ifdef __SOFTFP__
__ ldr(R0_tos, local);
#else
__ ldr_float(S0_tos, local);
#endif // __SOFTFP__
}
void TemplateTable::wide_dload() {
transition(vtos, dtos);
const Register Rlocal_index = R2_tmp;
locals_index_wide(Rlocal_index);
#ifdef __SOFTFP__
load_category2_local(Rlocal_index, R3_tmp);
#else
__ ldr_double(D0_tos, load_daddress(Rlocal_index, Rtemp));
#endif // __SOFTFP__
}
void TemplateTable::wide_aload() {
transition(vtos, atos);
const Register Rlocal_index = R2_tmp;
locals_index_wide(Rlocal_index);
Address local = load_aaddress(Rlocal_index, Rtemp);
__ ldr(R0_tos, local);
}
void TemplateTable::index_check(Register array, Register index) {
// Pop ptr into array
__ pop_ptr(array);
index_check_without_pop(array, index);
}
void TemplateTable::index_check_without_pop(Register array, Register index) {
assert_different_registers(array, index, Rtemp);
// check array
__ null_check(array, Rtemp, arrayOopDesc::length_offset_in_bytes());
// check index
__ ldr_s32(Rtemp, Address(array, arrayOopDesc::length_offset_in_bytes()));
__ cmp_32(index, Rtemp);
if (index != R4_ArrayIndexOutOfBounds_index) {
// convention with generate_ArrayIndexOutOfBounds_handler()
__ mov(R4_ArrayIndexOutOfBounds_index, index, hs);
}
__ mov(R1, array, hs);
__ b(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry, hs);
}
void TemplateTable::iaload() {
transition(itos, itos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_INT, Rarray, Rindex, Rtemp);
__ access_load_at(T_INT, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg);
}
void TemplateTable::laload() {
transition(itos, ltos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_LONG, Rarray, Rindex, Rtemp);
__ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, addr, noreg /* ltos */, noreg, noreg, noreg);
}
void TemplateTable::faload() {
transition(itos, ftos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_FLOAT, Rarray, Rindex, Rtemp);
__ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, addr, noreg /* ftos */, noreg, noreg, noreg);
}
void TemplateTable::daload() {
transition(itos, dtos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_DOUBLE, Rarray, Rindex, Rtemp);
__ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, addr, noreg /* dtos */, noreg, noreg, noreg);
}
void TemplateTable::aaload() {
transition(itos, atos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
do_oop_load(_masm, R0_tos, get_array_elem_addr_same_base(T_OBJECT, Rarray, Rindex, Rtemp), IS_ARRAY);
}
void TemplateTable::baload() {
transition(itos, itos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_BYTE, Rarray, Rindex, Rtemp);
__ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg);
}
void TemplateTable::caload() {
transition(itos, itos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_CHAR, Rarray, Rindex, Rtemp);
__ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg);
}
// iload followed by caload frequent pair
void TemplateTable::fast_icaload() {
transition(vtos, itos);
const Register Rlocal_index = R1_tmp;
const Register Rarray = R1_tmp;
const Register Rindex = R4_tmp; // index_check prefers index on R4
assert_different_registers(Rlocal_index, Rindex);
assert_different_registers(Rarray, Rindex);
// load index out of locals
locals_index(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(Rindex, local);
// get array element
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_CHAR, Rarray, Rindex, Rtemp);
__ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg);
}
void TemplateTable::saload() {
transition(itos, itos);
const Register Rarray = R1_tmp;
const Register Rindex = R0_tos;
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_SHORT, Rarray, Rindex, Rtemp);
__ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg);
}
void TemplateTable::iload(int n) {
transition(vtos, itos);
__ ldr_s32(R0_tos, iaddress(n));
}
void TemplateTable::lload(int n) {
transition(vtos, ltos);
__ ldr(R0_tos_lo, laddress(n));
__ ldr(R1_tos_hi, haddress(n));
}
void TemplateTable::fload(int n) {
transition(vtos, ftos);
#ifdef __SOFTFP__
__ ldr(R0_tos, faddress(n));
#else
__ ldr_float(S0_tos, faddress(n));
#endif // __SOFTFP__
}
void TemplateTable::dload(int n) {
transition(vtos, dtos);
#ifdef __SOFTFP__
__ ldr(R0_tos_lo, laddress(n));
__ ldr(R1_tos_hi, haddress(n));
#else
__ ldr_double(D0_tos, daddress(n));
#endif // __SOFTFP__
}
void TemplateTable::aload(int n) {
transition(vtos, atos);
__ ldr(R0_tos, aaddress(n));
}
void TemplateTable::aload_0() {
aload_0_internal();
}
void TemplateTable::nofast_aload_0() {
aload_0_internal(may_not_rewrite);
}
void TemplateTable::aload_0_internal(RewriteControl rc) {
transition(vtos, atos);
// According to bytecode histograms, the pairs:
//
// _aload_0, _fast_igetfield
// _aload_0, _fast_agetfield
// _aload_0, _fast_fgetfield
//
// occur frequently. If RewriteFrequentPairs is set, the (slow) _aload_0
// bytecode checks if the next bytecode is either _fast_igetfield,
// _fast_agetfield or _fast_fgetfield and then rewrites the
// current bytecode into a pair bytecode; otherwise it rewrites the current
// bytecode into _fast_aload_0 that doesn't do the pair check anymore.
//
// Note: If the next bytecode is _getfield, the rewrite must be delayed,
// otherwise we may miss an opportunity for a pair.
//
// Also rewrite frequent pairs
// aload_0, aload_1
// aload_0, iload_1
// These bytecodes with a small amount of code are most profitable to rewrite
if ((rc == may_rewrite) && __ rewrite_frequent_pairs()) {
Label rewrite, done;
const Register next_bytecode = R1_tmp;
const Register target_bytecode = R2_tmp;
// get next byte
__ ldrb(next_bytecode, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
// if _getfield then wait with rewrite
__ cmp(next_bytecode, Bytecodes::_getfield);
__ b(done, eq);
// if _igetfield then rewrite to _fast_iaccess_0
assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
__ cmp(next_bytecode, Bytecodes::_fast_igetfield);
__ mov(target_bytecode, Bytecodes::_fast_iaccess_0);
__ b(rewrite, eq);
// if _agetfield then rewrite to _fast_aaccess_0
assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
__ cmp(next_bytecode, Bytecodes::_fast_agetfield);
__ mov(target_bytecode, Bytecodes::_fast_aaccess_0);
__ b(rewrite, eq);
// if _fgetfield then rewrite to _fast_faccess_0, else rewrite to _fast_aload0
assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
__ cmp(next_bytecode, Bytecodes::_fast_fgetfield);
__ mov(target_bytecode, Bytecodes::_fast_faccess_0, eq);
__ mov(target_bytecode, Bytecodes::_fast_aload_0, ne);
// rewrite
__ bind(rewrite);
patch_bytecode(Bytecodes::_aload_0, target_bytecode, Rtemp, false);
__ bind(done);
}
aload(0);
}
void TemplateTable::istore() {
transition(itos, vtos);
const Register Rlocal_index = R2_tmp;
locals_index(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ str_32(R0_tos, local);
}
void TemplateTable::lstore() {
transition(ltos, vtos);
const Register Rlocal_index = R2_tmp;
locals_index(Rlocal_index);
store_category2_local(Rlocal_index, R3_tmp);
}
void TemplateTable::fstore() {
transition(ftos, vtos);
const Register Rlocal_index = R2_tmp;
locals_index(Rlocal_index);
Address local = load_faddress(Rlocal_index, Rtemp);
#ifdef __SOFTFP__
__ str(R0_tos, local);
#else
__ str_float(S0_tos, local);
#endif // __SOFTFP__
}
void TemplateTable::dstore() {
transition(dtos, vtos);
const Register Rlocal_index = R2_tmp;
locals_index(Rlocal_index);
#ifdef __SOFTFP__
store_category2_local(Rlocal_index, R3_tmp);
#else
__ str_double(D0_tos, load_daddress(Rlocal_index, Rtemp));
#endif // __SOFTFP__
}
void TemplateTable::astore() {
transition(vtos, vtos);
const Register Rlocal_index = R1_tmp;
__ pop_ptr(R0_tos);
locals_index(Rlocal_index);
Address local = load_aaddress(Rlocal_index, Rtemp);
__ str(R0_tos, local);
}
void TemplateTable::wide_istore() {
transition(vtos, vtos);
const Register Rlocal_index = R2_tmp;
__ pop_i(R0_tos);
locals_index_wide(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ str_32(R0_tos, local);
}
void TemplateTable::wide_lstore() {
transition(vtos, vtos);
const Register Rlocal_index = R2_tmp;
const Register Rlocal_base = R3_tmp;
__ pop_l(R0_tos_lo, R1_tos_hi);
locals_index_wide(Rlocal_index);
store_category2_local(Rlocal_index, R3_tmp);
}
void TemplateTable::wide_fstore() {
wide_istore();
}
void TemplateTable::wide_dstore() {
wide_lstore();
}
void TemplateTable::wide_astore() {
transition(vtos, vtos);
const Register Rlocal_index = R2_tmp;
__ pop_ptr(R0_tos);
locals_index_wide(Rlocal_index);
Address local = load_aaddress(Rlocal_index, Rtemp);
__ str(R0_tos, local);
}
void TemplateTable::iastore() {
transition(itos, vtos);
const Register Rindex = R4_tmp; // index_check prefers index in R4
const Register Rarray = R3_tmp;
// R0_tos: value
__ pop_i(Rindex);
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_INT, Rarray, Rindex, Rtemp);
__ access_store_at(T_INT, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg, false);
}
void TemplateTable::lastore() {
transition(ltos, vtos);
const Register Rindex = R4_tmp; // index_check prefers index in R4
const Register Rarray = R3_tmp;
// R0_tos_lo:R1_tos_hi: value
__ pop_i(Rindex);
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_LONG, Rarray, Rindex, Rtemp);
__ access_store_at(T_LONG, IN_HEAP | IS_ARRAY, addr, noreg /* ltos */, noreg, noreg, noreg, false);
}
void TemplateTable::fastore() {
transition(ftos, vtos);
const Register Rindex = R4_tmp; // index_check prefers index in R4
const Register Rarray = R3_tmp;
// S0_tos/R0_tos: value
__ pop_i(Rindex);
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_FLOAT, Rarray, Rindex, Rtemp);
__ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY, addr, noreg /* ftos */, noreg, noreg, noreg, false);
}
void TemplateTable::dastore() {
transition(dtos, vtos);
const Register Rindex = R4_tmp; // index_check prefers index in R4
const Register Rarray = R3_tmp;
// D0_tos / R0_tos_lo:R1_to_hi: value
__ pop_i(Rindex);
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_DOUBLE, Rarray, Rindex, Rtemp);
__ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY, addr, noreg /* dtos */, noreg, noreg, noreg, false);
}
void TemplateTable::aastore() {
transition(vtos, vtos);
Label is_null, throw_array_store, done;
const Register Raddr_1 = R1_tmp;
const Register Rvalue_2 = R2_tmp;
const Register Rarray_3 = R3_tmp;
const Register Rindex_4 = R4_tmp; // preferred by index_check_without_pop()
const Register Rsub_5 = R5_tmp;
const Register Rsuper_LR = LR_tmp;
// stack: ..., array, index, value
__ ldr(Rvalue_2, at_tos()); // Value
__ ldr_s32(Rindex_4, at_tos_p1()); // Index
__ ldr(Rarray_3, at_tos_p2()); // Array
index_check_without_pop(Rarray_3, Rindex_4);
// Compute the array base
__ add(Raddr_1, Rarray_3, arrayOopDesc::base_offset_in_bytes(T_OBJECT));
// do array store check - check for NULL value first
__ cbz(Rvalue_2, is_null);
// Load subklass
__ load_klass(Rsub_5, Rvalue_2);
// Load superklass
__ load_klass(Rtemp, Rarray_3);
__ ldr(Rsuper_LR, Address(Rtemp, ObjArrayKlass::element_klass_offset()));
__ gen_subtype_check(Rsub_5, Rsuper_LR, throw_array_store, R0_tmp, R3_tmp);
// Come here on success
// Store value
__ add(Raddr_1, Raddr_1, AsmOperand(Rindex_4, lsl, LogBytesPerHeapOop));
// Now store using the appropriate barrier
do_oop_store(_masm, Raddr_1, Rvalue_2, Rtemp, R0_tmp, R3_tmp, false, IS_ARRAY);
__ b(done);
__ bind(throw_array_store);
// Come here on failure of subtype check
__ profile_typecheck_failed(R0_tmp);
// object is at TOS
__ b(Interpreter::_throw_ArrayStoreException_entry);
// Have a NULL in Rvalue_2, store NULL at array[index].
__ bind(is_null);
__ profile_null_seen(R0_tmp);
// Store a NULL
do_oop_store(_masm, Address::indexed_oop(Raddr_1, Rindex_4), Rvalue_2, Rtemp, R0_tmp, R3_tmp, true, IS_ARRAY);
// Pop stack arguments
__ bind(done);
__ add(Rstack_top, Rstack_top, 3 * Interpreter::stackElementSize);
}
void TemplateTable::bastore() {
transition(itos, vtos);
const Register Rindex = R4_tmp; // index_check prefers index in R4
const Register Rarray = R3_tmp;
// R0_tos: value
__ pop_i(Rindex);
index_check(Rarray, Rindex);
// Need to check whether array is boolean or byte
// since both types share the bastore bytecode.
__ load_klass(Rtemp, Rarray);
__ ldr_u32(Rtemp, Address(Rtemp, Klass::layout_helper_offset()));
Label L_skip;
__ tst(Rtemp, Klass::layout_helper_boolean_diffbit());
__ b(L_skip, eq);
__ and_32(R0_tos, R0_tos, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
__ bind(L_skip);
Address addr = get_array_elem_addr_same_base(T_BYTE, Rarray, Rindex, Rtemp);
__ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg, false);
}
void TemplateTable::castore() {
transition(itos, vtos);
const Register Rindex = R4_tmp; // index_check prefers index in R4
const Register Rarray = R3_tmp;
// R0_tos: value
__ pop_i(Rindex);
index_check(Rarray, Rindex);
Address addr = get_array_elem_addr_same_base(T_CHAR, Rarray, Rindex, Rtemp);
__ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY, addr, R0_tos, noreg, noreg, noreg, false);
}
void TemplateTable::sastore() {
assert(arrayOopDesc::base_offset_in_bytes(T_CHAR) ==
arrayOopDesc::base_offset_in_bytes(T_SHORT),
"base offsets for char and short should be equal");
castore();
}
void TemplateTable::istore(int n) {
transition(itos, vtos);
__ str_32(R0_tos, iaddress(n));
}
void TemplateTable::lstore(int n) {
transition(ltos, vtos);
__ str(R0_tos_lo, laddress(n));
__ str(R1_tos_hi, haddress(n));
}
void TemplateTable::fstore(int n) {
transition(ftos, vtos);
#ifdef __SOFTFP__
__ str(R0_tos, faddress(n));
#else
__ str_float(S0_tos, faddress(n));
#endif // __SOFTFP__
}
void TemplateTable::dstore(int n) {
transition(dtos, vtos);
#ifdef __SOFTFP__
__ str(R0_tos_lo, laddress(n));
__ str(R1_tos_hi, haddress(n));
#else
__ str_double(D0_tos, daddress(n));
#endif // __SOFTFP__
}
void TemplateTable::astore(int n) {
transition(vtos, vtos);
__ pop_ptr(R0_tos);
__ str(R0_tos, aaddress(n));
}
void TemplateTable::pop() {
transition(vtos, vtos);
__ add(Rstack_top, Rstack_top, Interpreter::stackElementSize);
}
void TemplateTable::pop2() {
transition(vtos, vtos);
__ add(Rstack_top, Rstack_top, 2*Interpreter::stackElementSize);
}
void TemplateTable::dup() {
transition(vtos, vtos);
// stack: ..., a
__ load_ptr(0, R0_tmp);
__ push_ptr(R0_tmp);
// stack: ..., a, a
}
void TemplateTable::dup_x1() {
transition(vtos, vtos);
// stack: ..., a, b
__ load_ptr(0, R0_tmp); // load b
__ load_ptr(1, R2_tmp); // load a
__ store_ptr(1, R0_tmp); // store b
__ store_ptr(0, R2_tmp); // store a
__ push_ptr(R0_tmp); // push b
// stack: ..., b, a, b
}
void TemplateTable::dup_x2() {
transition(vtos, vtos);
// stack: ..., a, b, c
__ load_ptr(0, R0_tmp); // load c
__ load_ptr(1, R2_tmp); // load b
__ load_ptr(2, R4_tmp); // load a
__ push_ptr(R0_tmp); // push c
// stack: ..., a, b, c, c
__ store_ptr(1, R2_tmp); // store b
__ store_ptr(2, R4_tmp); // store a
__ store_ptr(3, R0_tmp); // store c
// stack: ..., c, a, b, c
}
void TemplateTable::dup2() {
transition(vtos, vtos);
// stack: ..., a, b
__ load_ptr(1, R0_tmp); // load a
__ push_ptr(R0_tmp); // push a
__ load_ptr(1, R0_tmp); // load b
__ push_ptr(R0_tmp); // push b
// stack: ..., a, b, a, b
}
void TemplateTable::dup2_x1() {
transition(vtos, vtos);
// stack: ..., a, b, c
__ load_ptr(0, R4_tmp); // load c
__ load_ptr(1, R2_tmp); // load b
__ load_ptr(2, R0_tmp); // load a
__ push_ptr(R2_tmp); // push b
__ push_ptr(R4_tmp); // push c
// stack: ..., a, b, c, b, c
__ store_ptr(2, R0_tmp); // store a
__ store_ptr(3, R4_tmp); // store c
__ store_ptr(4, R2_tmp); // store b
// stack: ..., b, c, a, b, c
}
void TemplateTable::dup2_x2() {
transition(vtos, vtos);
// stack: ..., a, b, c, d
__ load_ptr(0, R0_tmp); // load d
__ load_ptr(1, R2_tmp); // load c
__ push_ptr(R2_tmp); // push c
__ push_ptr(R0_tmp); // push d
// stack: ..., a, b, c, d, c, d
__ load_ptr(4, R4_tmp); // load b
__ store_ptr(4, R0_tmp); // store d in b
__ store_ptr(2, R4_tmp); // store b in d
// stack: ..., a, d, c, b, c, d
__ load_ptr(5, R4_tmp); // load a
__ store_ptr(5, R2_tmp); // store c in a
__ store_ptr(3, R4_tmp); // store a in c
// stack: ..., c, d, a, b, c, d
}
void TemplateTable::swap() {
transition(vtos, vtos);
// stack: ..., a, b
__ load_ptr(1, R0_tmp); // load a
__ load_ptr(0, R2_tmp); // load b
__ store_ptr(0, R0_tmp); // store a in b
__ store_ptr(1, R2_tmp); // store b in a
// stack: ..., b, a
}
void TemplateTable::iop2(Operation op) {
transition(itos, itos);
const Register arg1 = R1_tmp;
const Register arg2 = R0_tos;
__ pop_i(arg1);
switch (op) {
case add : __ add_32 (R0_tos, arg1, arg2); break;
case sub : __ sub_32 (R0_tos, arg1, arg2); break;
case mul : __ mul_32 (R0_tos, arg1, arg2); break;
case _and : __ and_32 (R0_tos, arg1, arg2); break;
case _or : __ orr_32 (R0_tos, arg1, arg2); break;
case _xor : __ eor_32 (R0_tos, arg1, arg2); break;
case shl : __ andr(arg2, arg2, 0x1f); __ mov (R0_tos, AsmOperand(arg1, lsl, arg2)); break;
case shr : __ andr(arg2, arg2, 0x1f); __ mov (R0_tos, AsmOperand(arg1, asr, arg2)); break;
case ushr : __ andr(arg2, arg2, 0x1f); __ mov (R0_tos, AsmOperand(arg1, lsr, arg2)); break;
default : ShouldNotReachHere();
}
}
void TemplateTable::lop2(Operation op) {
transition(ltos, ltos);
const Register arg1_lo = R2_tmp;
const Register arg1_hi = R3_tmp;
const Register arg2_lo = R0_tos_lo;
const Register arg2_hi = R1_tos_hi;
__ pop_l(arg1_lo, arg1_hi);
switch (op) {
case add : __ adds(R0_tos_lo, arg1_lo, arg2_lo); __ adc (R1_tos_hi, arg1_hi, arg2_hi); break;
case sub : __ subs(R0_tos_lo, arg1_lo, arg2_lo); __ sbc (R1_tos_hi, arg1_hi, arg2_hi); break;
case _and: __ andr(R0_tos_lo, arg1_lo, arg2_lo); __ andr(R1_tos_hi, arg1_hi, arg2_hi); break;
case _or : __ orr (R0_tos_lo, arg1_lo, arg2_lo); __ orr (R1_tos_hi, arg1_hi, arg2_hi); break;
case _xor: __ eor (R0_tos_lo, arg1_lo, arg2_lo); __ eor (R1_tos_hi, arg1_hi, arg2_hi); break;
default : ShouldNotReachHere();
}
}
void TemplateTable::idiv() {
transition(itos, itos);
__ mov(R2, R0_tos);
__ pop_i(R0);
// R0 - dividend
// R2 - divisor
__ call(StubRoutines::Arm::idiv_irem_entry(), relocInfo::none);
// R1 - result
__ mov(R0_tos, R1);
}
void TemplateTable::irem() {
transition(itos, itos);
__ mov(R2, R0_tos);
__ pop_i(R0);
// R0 - dividend
// R2 - divisor
__ call(StubRoutines::Arm::idiv_irem_entry(), relocInfo::none);
// R0 - remainder
}
void TemplateTable::lmul() {
transition(ltos, ltos);
const Register arg1_lo = R0_tos_lo;
const Register arg1_hi = R1_tos_hi;
const Register arg2_lo = R2_tmp;
const Register arg2_hi = R3_tmp;
__ pop_l(arg2_lo, arg2_hi);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lmul), arg1_lo, arg1_hi, arg2_lo, arg2_hi);
}
void TemplateTable::ldiv() {
transition(ltos, ltos);
const Register x_lo = R2_tmp;
const Register x_hi = R3_tmp;
const Register y_lo = R0_tos_lo;
const Register y_hi = R1_tos_hi;
__ pop_l(x_lo, x_hi);
// check if y = 0
__ orrs(Rtemp, y_lo, y_hi);
__ call(Interpreter::_throw_ArithmeticException_entry, relocInfo::none, eq);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv), y_lo, y_hi, x_lo, x_hi);
}
void TemplateTable::lrem() {
transition(ltos, ltos);
const Register x_lo = R2_tmp;
const Register x_hi = R3_tmp;
const Register y_lo = R0_tos_lo;
const Register y_hi = R1_tos_hi;
__ pop_l(x_lo, x_hi);
// check if y = 0
__ orrs(Rtemp, y_lo, y_hi);
__ call(Interpreter::_throw_ArithmeticException_entry, relocInfo::none, eq);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem), y_lo, y_hi, x_lo, x_hi);
}
void TemplateTable::lshl() {
transition(itos, ltos);
const Register shift_cnt = R4_tmp;
const Register val_lo = R2_tmp;
const Register val_hi = R3_tmp;
__ pop_l(val_lo, val_hi);
__ andr(shift_cnt, R0_tos, 63);
__ long_shift(R0_tos_lo, R1_tos_hi, val_lo, val_hi, lsl, shift_cnt);
}
void TemplateTable::lshr() {
transition(itos, ltos);
const Register shift_cnt = R4_tmp;
const Register val_lo = R2_tmp;
const Register val_hi = R3_tmp;
__ pop_l(val_lo, val_hi);
__ andr(shift_cnt, R0_tos, 63);
__ long_shift(R0_tos_lo, R1_tos_hi, val_lo, val_hi, asr, shift_cnt);
}
void TemplateTable::lushr() {
transition(itos, ltos);
const Register shift_cnt = R4_tmp;
const Register val_lo = R2_tmp;
const Register val_hi = R3_tmp;
__ pop_l(val_lo, val_hi);
__ andr(shift_cnt, R0_tos, 63);
__ long_shift(R0_tos_lo, R1_tos_hi, val_lo, val_hi, lsr, shift_cnt);
}
void TemplateTable::fop2(Operation op) {
transition(ftos, ftos);
#ifdef __SOFTFP__
__ mov(R1, R0_tos);
__ pop_i(R0);
switch (op) {
case add: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_fadd_glibc), R0, R1); break;
case sub: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_fsub_glibc), R0, R1); break;
case mul: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_fmul), R0, R1); break;
case div: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_fdiv), R0, R1); break;
case rem: __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), R0, R1); break;
default : ShouldNotReachHere();
}
#else
const FloatRegister arg1 = S1_tmp;
const FloatRegister arg2 = S0_tos;
switch (op) {
case add: __ pop_f(arg1); __ add_float(S0_tos, arg1, arg2); break;
case sub: __ pop_f(arg1); __ sub_float(S0_tos, arg1, arg2); break;
case mul: __ pop_f(arg1); __ mul_float(S0_tos, arg1, arg2); break;
case div: __ pop_f(arg1); __ div_float(S0_tos, arg1, arg2); break;
case rem:
#ifndef __ABI_HARD__
__ pop_f(arg1);
__ fmrs(R0, arg1);
__ fmrs(R1, arg2);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), R0, R1);
__ fmsr(S0_tos, R0);
#else
__ mov_float(S1_reg, arg2);
__ pop_f(S0);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem));
#endif // !__ABI_HARD__
break;
default : ShouldNotReachHere();
}
#endif // __SOFTFP__
}
void TemplateTable::dop2(Operation op) {
transition(dtos, dtos);
#ifdef __SOFTFP__
__ mov(R2, R0_tos_lo);
__ mov(R3, R1_tos_hi);
__ pop_l(R0, R1);
switch (op) {
// __aeabi_XXXX_glibc: Imported code from glibc soft-fp bundle for calculation accuracy improvement. See CR 6757269.
case add: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_dadd_glibc), R0, R1, R2, R3); break;
case sub: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_dsub_glibc), R0, R1, R2, R3); break;
case mul: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_dmul), R0, R1, R2, R3); break;
case div: __ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_ddiv), R0, R1, R2, R3); break;
case rem: __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), R0, R1, R2, R3); break;
default : ShouldNotReachHere();
}
#else
const FloatRegister arg1 = D1_tmp;
const FloatRegister arg2 = D0_tos;
switch (op) {
case add: __ pop_d(arg1); __ add_double(D0_tos, arg1, arg2); break;
case sub: __ pop_d(arg1); __ sub_double(D0_tos, arg1, arg2); break;
case mul: __ pop_d(arg1); __ mul_double(D0_tos, arg1, arg2); break;
case div: __ pop_d(arg1); __ div_double(D0_tos, arg1, arg2); break;
case rem:
#ifndef __ABI_HARD__
__ pop_d(arg1);
__ fmrrd(R0, R1, arg1);
__ fmrrd(R2, R3, arg2);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), R0, R1, R2, R3);
__ fmdrr(D0_tos, R0, R1);
#else
__ mov_double(D1, arg2);
__ pop_d(D0);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem));
#endif // !__ABI_HARD__
break;
default : ShouldNotReachHere();
}
#endif // __SOFTFP__
}
void TemplateTable::ineg() {
transition(itos, itos);
__ neg_32(R0_tos, R0_tos);
}
void TemplateTable::lneg() {
transition(ltos, ltos);
__ rsbs(R0_tos_lo, R0_tos_lo, 0);
__ rsc (R1_tos_hi, R1_tos_hi, 0);
}
void TemplateTable::fneg() {
transition(ftos, ftos);
#ifdef __SOFTFP__
// Invert sign bit
const int sign_mask = 0x80000000;
__ eor(R0_tos, R0_tos, sign_mask);
#else
__ neg_float(S0_tos, S0_tos);
#endif // __SOFTFP__
}
void TemplateTable::dneg() {
transition(dtos, dtos);
#ifdef __SOFTFP__
// Invert sign bit in the high part of the double
const int sign_mask_hi = 0x80000000;
__ eor(R1_tos_hi, R1_tos_hi, sign_mask_hi);
#else
__ neg_double(D0_tos, D0_tos);
#endif // __SOFTFP__
}
void TemplateTable::iinc() {
transition(vtos, vtos);
const Register Rconst = R2_tmp;
const Register Rlocal_index = R1_tmp;
const Register Rval = R0_tmp;
__ ldrsb(Rconst, at_bcp(2));
locals_index(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(Rval, local);
__ add(Rval, Rval, Rconst);
__ str_32(Rval, local);
}
void TemplateTable::wide_iinc() {
transition(vtos, vtos);
const Register Rconst = R2_tmp;
const Register Rlocal_index = R1_tmp;
const Register Rval = R0_tmp;
// get constant in Rconst
__ ldrsb(R2_tmp, at_bcp(4));
__ ldrb(R3_tmp, at_bcp(5));
__ orr(Rconst, R3_tmp, AsmOperand(R2_tmp, lsl, 8));
locals_index_wide(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(Rval, local);
__ add(Rval, Rval, Rconst);
__ str_32(Rval, local);
}
void TemplateTable::convert() {
// Checking
#ifdef ASSERT
{ TosState tos_in = ilgl;
TosState tos_out = ilgl;
switch (bytecode()) {
case Bytecodes::_i2l: // fall through
case Bytecodes::_i2f: // fall through
case Bytecodes::_i2d: // fall through
case Bytecodes::_i2b: // fall through
case Bytecodes::_i2c: // fall through
case Bytecodes::_i2s: tos_in = itos; break;
case Bytecodes::_l2i: // fall through
case Bytecodes::_l2f: // fall through
case Bytecodes::_l2d: tos_in = ltos; break;
case Bytecodes::_f2i: // fall through
case Bytecodes::_f2l: // fall through
case Bytecodes::_f2d: tos_in = ftos; break;
case Bytecodes::_d2i: // fall through
case Bytecodes::_d2l: // fall through
case Bytecodes::_d2f: tos_in = dtos; break;
default : ShouldNotReachHere();
}
switch (bytecode()) {
case Bytecodes::_l2i: // fall through
case Bytecodes::_f2i: // fall through
case Bytecodes::_d2i: // fall through
case Bytecodes::_i2b: // fall through
case Bytecodes::_i2c: // fall through
case Bytecodes::_i2s: tos_out = itos; break;
case Bytecodes::_i2l: // fall through
case Bytecodes::_f2l: // fall through
case Bytecodes::_d2l: tos_out = ltos; break;
case Bytecodes::_i2f: // fall through
case Bytecodes::_l2f: // fall through
case Bytecodes::_d2f: tos_out = ftos; break;
case Bytecodes::_i2d: // fall through
case Bytecodes::_l2d: // fall through
case Bytecodes::_f2d: tos_out = dtos; break;
default : ShouldNotReachHere();
}
transition(tos_in, tos_out);
}
#endif // ASSERT
// Conversion
switch (bytecode()) {
case Bytecodes::_i2l:
__ mov(R1_tos_hi, AsmOperand(R0_tos, asr, BitsPerWord-1));
break;
case Bytecodes::_i2f:
#ifdef __SOFTFP__
__ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_i2f), R0_tos);
#else
__ fmsr(S0_tmp, R0_tos);
__ fsitos(S0_tos, S0_tmp);
#endif // __SOFTFP__
break;
case Bytecodes::_i2d:
#ifdef __SOFTFP__
__ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_i2d), R0_tos);
#else
__ fmsr(S0_tmp, R0_tos);
__ fsitod(D0_tos, S0_tmp);
#endif // __SOFTFP__
break;
case Bytecodes::_i2b:
__ sign_extend(R0_tos, R0_tos, 8);
break;
case Bytecodes::_i2c:
__ zero_extend(R0_tos, R0_tos, 16);
break;
case Bytecodes::_i2s:
__ sign_extend(R0_tos, R0_tos, 16);
break;
case Bytecodes::_l2i:
/* nothing to do */
break;
case Bytecodes::_l2f:
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::l2f), R0_tos_lo, R1_tos_hi);
#if !defined(__SOFTFP__) && !defined(__ABI_HARD__)
__ fmsr(S0_tos, R0);
#endif // !__SOFTFP__ && !__ABI_HARD__
break;
case Bytecodes::_l2d:
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::l2d), R0_tos_lo, R1_tos_hi);
#if !defined(__SOFTFP__) && !defined(__ABI_HARD__)
__ fmdrr(D0_tos, R0, R1);
#endif // !__SOFTFP__ && !__ABI_HARD__
break;
case Bytecodes::_f2i:
#ifndef __SOFTFP__
__ ftosizs(S0_tos, S0_tos);
__ fmrs(R0_tos, S0_tos);
#else
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), R0_tos);
#endif // !__SOFTFP__
break;
case Bytecodes::_f2l:
#ifndef __SOFTFP__
__ fmrs(R0_tos, S0_tos);
#endif // !__SOFTFP__
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), R0_tos);
break;
case Bytecodes::_f2d:
#ifdef __SOFTFP__
__ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_f2d), R0_tos);
#else
__ convert_f2d(D0_tos, S0_tos);
#endif // __SOFTFP__
break;
case Bytecodes::_d2i:
#ifndef __SOFTFP__
__ ftosizd(Stemp, D0);
__ fmrs(R0, Stemp);
#else
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), R0_tos_lo, R1_tos_hi);
#endif // !__SOFTFP__
break;
case Bytecodes::_d2l:
#ifndef __SOFTFP__
__ fmrrd(R0_tos_lo, R1_tos_hi, D0_tos);
#endif // !__SOFTFP__
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), R0_tos_lo, R1_tos_hi);
break;
case Bytecodes::_d2f:
#ifdef __SOFTFP__
__ call_VM_leaf(CAST_FROM_FN_PTR(address, __aeabi_d2f), R0_tos_lo, R1_tos_hi);
#else
__ convert_d2f(S0_tos, D0_tos);
#endif // __SOFTFP__
break;
default:
ShouldNotReachHere();
}
}
void TemplateTable::lcmp() {
transition(ltos, itos);
const Register arg1_lo = R2_tmp;
const Register arg1_hi = R3_tmp;
const Register arg2_lo = R0_tos_lo;
const Register arg2_hi = R1_tos_hi;
const Register res = R4_tmp;
__ pop_l(arg1_lo, arg1_hi);
// long compare arg1 with arg2
// result is -1/0/+1 if '<'/'='/'>'
Label done;
__ mov (res, 0);
__ cmp (arg1_hi, arg2_hi);
__ mvn (res, 0, lt);
__ mov (res, 1, gt);
__ b(done, ne);
__ cmp (arg1_lo, arg2_lo);
__ mvn (res, 0, lo);
__ mov (res, 1, hi);
__ bind(done);
__ mov (R0_tos, res);
}
void TemplateTable::float_cmp(bool is_float, int unordered_result) {
assert((unordered_result == 1) || (unordered_result == -1), "invalid unordered result");
#ifdef __SOFTFP__
if (is_float) {
transition(ftos, itos);
const Register Rx = R0;
const Register Ry = R1;
__ mov(Ry, R0_tos);
__ pop_i(Rx);
if (unordered_result == 1) {
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::fcmpg), Rx, Ry);
} else {
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::fcmpl), Rx, Ry);
}
} else {
transition(dtos, itos);
const Register Rx_lo = R0;
const Register Rx_hi = R1;
const Register Ry_lo = R2;
const Register Ry_hi = R3;
__ mov(Ry_lo, R0_tos_lo);
__ mov(Ry_hi, R1_tos_hi);
__ pop_l(Rx_lo, Rx_hi);
if (unordered_result == 1) {
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dcmpg), Rx_lo, Rx_hi, Ry_lo, Ry_hi);
} else {
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dcmpl), Rx_lo, Rx_hi, Ry_lo, Ry_hi);
}
}
#else
if (is_float) {
transition(ftos, itos);
__ pop_f(S1_tmp);
__ fcmps(S1_tmp, S0_tos);
} else {
transition(dtos, itos);
__ pop_d(D1_tmp);
__ fcmpd(D1_tmp, D0_tos);
}
__ fmstat();
// comparison result | flag N | flag Z | flag C | flag V
// "<" | 1 | 0 | 0 | 0
// "==" | 0 | 1 | 1 | 0
// ">" | 0 | 0 | 1 | 0
// unordered | 0 | 0 | 1 | 1
if (unordered_result < 0) {
__ mov(R0_tos, 1); // result == 1 if greater
__ mvn(R0_tos, 0, lt); // result == -1 if less or unordered (N!=V)
} else {
__ mov(R0_tos, 1); // result == 1 if greater or unordered
__ mvn(R0_tos, 0, mi); // result == -1 if less (N=1)
}
__ mov(R0_tos, 0, eq); // result == 0 if equ (Z=1)
#endif // __SOFTFP__
}
void TemplateTable::branch(bool is_jsr, bool is_wide) {
const Register Rdisp = R0_tmp;
const Register Rbumped_taken_count = R5_tmp;
__ profile_taken_branch(R0_tmp, Rbumped_taken_count); // R0 holds updated MDP, Rbumped_taken_count holds bumped taken count
const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
InvocationCounter::counter_offset();
const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
InvocationCounter::counter_offset();
const int method_offset = frame::interpreter_frame_method_offset * wordSize;
// Load up R0 with the branch displacement
if (is_wide) {
__ ldrsb(R0_tmp, at_bcp(1));
__ ldrb(R1_tmp, at_bcp(2));
__ ldrb(R2_tmp, at_bcp(3));
__ ldrb(R3_tmp, at_bcp(4));
__ orr(R0_tmp, R1_tmp, AsmOperand(R0_tmp, lsl, BitsPerByte));
__ orr(R0_tmp, R2_tmp, AsmOperand(R0_tmp, lsl, BitsPerByte));
__ orr(Rdisp, R3_tmp, AsmOperand(R0_tmp, lsl, BitsPerByte));
} else {
__ ldrsb(R0_tmp, at_bcp(1));
__ ldrb(R1_tmp, at_bcp(2));
__ orr(Rdisp, R1_tmp, AsmOperand(R0_tmp, lsl, BitsPerByte));
}
// Handle all the JSR stuff here, then exit.
// It's much shorter and cleaner than intermingling with the
// non-JSR normal-branch stuff occuring below.
if (is_jsr) {
// compute return address as bci in R1
const Register Rret_addr = R1_tmp;
assert_different_registers(Rdisp, Rret_addr, Rtemp);
__ ldr(Rtemp, Address(Rmethod, Method::const_offset()));
__ sub(Rret_addr, Rbcp, - (is_wide ? 5 : 3) + in_bytes(ConstMethod::codes_offset()));
__ sub(Rret_addr, Rret_addr, Rtemp);
// Load the next target bytecode into R3_bytecode and advance Rbcp
__ ldrb(R3_bytecode, Address(Rbcp, Rdisp, lsl, 0, pre_indexed));
// Push return address
__ push_i(Rret_addr);
// jsr returns vtos
__ dispatch_only_noverify(vtos);
return;
}
// Normal (non-jsr) branch handling
// Adjust the bcp by the displacement in Rdisp and load next bytecode.
__ ldrb(R3_bytecode, Address(Rbcp, Rdisp, lsl, 0, pre_indexed));
assert(UseLoopCounter || !UseOnStackReplacement, "on-stack-replacement requires loop counters");
Label backedge_counter_overflow;
Label profile_method;
Label dispatch;
if (UseLoopCounter) {
// increment backedge counter for backward branches
// Rdisp (R0): target offset
const Register Rcnt = R2_tmp;
const Register Rcounters = R1_tmp;
// count only if backward branch
__ tst(Rdisp, Rdisp);
__ b(dispatch, pl);
if (TieredCompilation) {
Label no_mdo;
int increment = InvocationCounter::count_increment;
if (ProfileInterpreter) {
// Are we profiling?
__ ldr(Rtemp, Address(Rmethod, Method::method_data_offset()));
__ cbz(Rtemp, no_mdo);
// Increment the MDO backedge counter
const Address mdo_backedge_counter(Rtemp, in_bytes(MethodData::backedge_counter_offset()) +
in_bytes(InvocationCounter::counter_offset()));
const Address mask(Rtemp, in_bytes(MethodData::backedge_mask_offset()));
__ increment_mask_and_jump(mdo_backedge_counter, increment, mask,
Rcnt, R4_tmp, eq, &backedge_counter_overflow);
__ b(dispatch);
}
__ bind(no_mdo);
// Increment backedge counter in MethodCounters*
// Note Rbumped_taken_count is a callee saved registers for ARM32
__ get_method_counters(Rmethod, Rcounters, dispatch, true /*saveRegs*/,
Rdisp, R3_bytecode,
noreg);
const Address mask(Rcounters, in_bytes(MethodCounters::backedge_mask_offset()));
__ increment_mask_and_jump(Address(Rcounters, be_offset), increment, mask,
Rcnt, R4_tmp, eq, &backedge_counter_overflow);
} else {
// Increment backedge counter in MethodCounters*
__ get_method_counters(Rmethod, Rcounters, dispatch, true /*saveRegs*/,
Rdisp, R3_bytecode,
noreg);
__ ldr_u32(Rtemp, Address(Rcounters, be_offset)); // load backedge counter
__ add(Rtemp, Rtemp, InvocationCounter::count_increment); // increment counter
__ str_32(Rtemp, Address(Rcounters, be_offset)); // store counter
__ ldr_u32(Rcnt, Address(Rcounters, inv_offset)); // load invocation counter
__ bic(Rcnt, Rcnt, ~InvocationCounter::count_mask_value); // and the status bits
__ add(Rcnt, Rcnt, Rtemp); // add both counters
if (ProfileInterpreter) {
// Test to see if we should create a method data oop
const Address profile_limit(Rcounters, in_bytes(MethodCounters::interpreter_profile_limit_offset()));
__ ldr_s32(Rtemp, profile_limit);
__ cmp_32(Rcnt, Rtemp);
__ b(dispatch, lt);
// if no method data exists, go to profile method
__ test_method_data_pointer(R4_tmp, profile_method);
if (UseOnStackReplacement) {
// check for overflow against Rbumped_taken_count, which is the MDO taken count
const Address backward_branch_limit(Rcounters, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()));
__ ldr_s32(Rtemp, backward_branch_limit);
__ cmp(Rbumped_taken_count, Rtemp);
__ b(dispatch, lo);
// When ProfileInterpreter is on, the backedge_count comes from the
// MethodData*, 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.
const int overflow_frequency = 1024;
// was '__ andrs(...,overflow_frequency-1)', testing if lowest 10 bits are 0
assert(overflow_frequency == (1 << 10),"shift by 22 not correct for expected frequency");
__ movs(Rbumped_taken_count, AsmOperand(Rbumped_taken_count, lsl, 22));
__ b(backedge_counter_overflow, eq);
}
} else {
if (UseOnStackReplacement) {
// check for overflow against Rcnt, which is the sum of the counters
const Address backward_branch_limit(Rcounters, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()));
__ ldr_s32(Rtemp, backward_branch_limit);
__ cmp_32(Rcnt, Rtemp);
__ b(backedge_counter_overflow, hs);
}
}
}
__ bind(dispatch);
}
if (!UseOnStackReplacement) {
__ bind(backedge_counter_overflow);
}
// continue with the bytecode @ target
__ dispatch_only(vtos);
if (UseLoopCounter) {
if (ProfileInterpreter) {
// Out-of-line code to allocate method data oop.
__ bind(profile_method);
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
__ set_method_data_pointer_for_bcp();
// reload next bytecode
__ ldrb(R3_bytecode, Address(Rbcp));
__ b(dispatch);
}
if (UseOnStackReplacement) {
// invocation counter overflow
__ bind(backedge_counter_overflow);
__ sub(R1, Rbcp, Rdisp); // branch bcp
call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R1);
// R0: osr nmethod (osr ok) or NULL (osr not possible)
const Register Rnmethod = R0;
__ ldrb(R3_bytecode, Address(Rbcp)); // reload next bytecode
__ cbz(Rnmethod, dispatch); // test result, no osr if null
// nmethod may have been invalidated (VM may block upon call_VM return)
__ ldrb(R1_tmp, Address(Rnmethod, nmethod::state_offset()));
__ cmp(R1_tmp, nmethod::in_use);
__ b(dispatch, ne);
// We have the address of an on stack replacement routine in Rnmethod,
// We need to prepare to execute the OSR method. First we must
// migrate the locals and monitors off of the stack.
__ mov(Rtmp_save0, Rnmethod); // save the nmethod
call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
// R0 is OSR buffer
__ ldr(R1_tmp, Address(Rtmp_save0, nmethod::osr_entry_point_offset()));
__ ldr(Rtemp, Address(FP, frame::interpreter_frame_sender_sp_offset * wordSize));
__ ldmia(FP, RegisterSet(FP) | RegisterSet(LR));
__ bic(SP, Rtemp, StackAlignmentInBytes - 1); // Remove frame and align stack
__ jump(R1_tmp);
}
}
}
void TemplateTable::if_0cmp(Condition cc) {
transition(itos, vtos);
// assume branch is more often taken than not (loops use backward branches)
Label not_taken;
__ cmp_32(R0_tos, 0);
__ b(not_taken, convNegCond(cc));
branch(false, false);
__ bind(not_taken);
__ profile_not_taken_branch(R0_tmp);
}
void TemplateTable::if_icmp(Condition cc) {
transition(itos, vtos);
// assume branch is more often taken than not (loops use backward branches)
Label not_taken;
__ pop_i(R1_tmp);
__ cmp_32(R1_tmp, R0_tos);
__ b(not_taken, convNegCond(cc));
branch(false, false);
__ bind(not_taken);
__ profile_not_taken_branch(R0_tmp);
}
void TemplateTable::if_nullcmp(Condition cc) {
transition(atos, vtos);
assert(cc == equal || cc == not_equal, "invalid condition");
// assume branch is more often taken than not (loops use backward branches)
Label not_taken;
if (cc == equal) {
__ cbnz(R0_tos, not_taken);
} else {
__ cbz(R0_tos, not_taken);
}
branch(false, false);
__ bind(not_taken);
__ profile_not_taken_branch(R0_tmp);
}
void TemplateTable::if_acmp(Condition cc) {
transition(atos, vtos);
// assume branch is more often taken than not (loops use backward branches)
Label not_taken;
__ pop_ptr(R1_tmp);
__ cmpoop(R1_tmp, R0_tos);
__ b(not_taken, convNegCond(cc));
branch(false, false);
__ bind(not_taken);
__ profile_not_taken_branch(R0_tmp);
}
void TemplateTable::ret() {
transition(vtos, vtos);
const Register Rlocal_index = R1_tmp;
const Register Rret_bci = Rtmp_save0; // R4/R19
locals_index(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(Rret_bci, local); // get return bci, compute return bcp
__ profile_ret(Rtmp_save1, Rret_bci);
__ ldr(Rtemp, Address(Rmethod, Method::const_offset()));
__ add(Rtemp, Rtemp, in_bytes(ConstMethod::codes_offset()));
__ add(Rbcp, Rtemp, Rret_bci);
__ dispatch_next(vtos);
}
void TemplateTable::wide_ret() {
transition(vtos, vtos);
const Register Rlocal_index = R1_tmp;
const Register Rret_bci = Rtmp_save0; // R4/R19
locals_index_wide(Rlocal_index);
Address local = load_iaddress(Rlocal_index, Rtemp);
__ ldr_s32(Rret_bci, local); // get return bci, compute return bcp
__ profile_ret(Rtmp_save1, Rret_bci);
__ ldr(Rtemp, Address(Rmethod, Method::const_offset()));
__ add(Rtemp, Rtemp, in_bytes(ConstMethod::codes_offset()));
__ add(Rbcp, Rtemp, Rret_bci);
__ dispatch_next(vtos);
}
void TemplateTable::tableswitch() {
transition(itos, vtos);
const Register Rindex = R0_tos;
const Register Rtemp2 = R1_tmp;
const Register Rabcp = R2_tmp; // aligned bcp
const Register Rlow = R3_tmp;
const Register Rhigh = R4_tmp;
const Register Roffset = R5_tmp;
// align bcp
__ add(Rtemp, Rbcp, 1 + (2*BytesPerInt-1));
__ align_reg(Rabcp, Rtemp, BytesPerInt);
// load lo & hi
__ ldmia(Rabcp, RegisterSet(Rlow) | RegisterSet(Rhigh), writeback);
__ byteswap_u32(Rlow, Rtemp, Rtemp2);
__ byteswap_u32(Rhigh, Rtemp, Rtemp2);
// compare index with high bound
__ cmp_32(Rhigh, Rindex);
// if Rindex <= Rhigh then calculate index in table (Rindex - Rlow)
__ subs(Rindex, Rindex, Rlow, ge);
// if Rindex <= Rhigh and (Rindex - Rlow) >= 0
// ("ge" status accumulated from cmp and subs instructions) then load
// offset from table, otherwise load offset for default case
if(ProfileInterpreter) {
Label default_case, continue_execution;
__ b(default_case, lt);
__ ldr(Roffset, Address(Rabcp, Rindex, lsl, LogBytesPerInt));
__ profile_switch_case(Rabcp, Rindex, Rtemp2, R0_tmp);
__ b(continue_execution);
__ bind(default_case);
__ profile_switch_default(R0_tmp);
__ ldr(Roffset, Address(Rabcp, -3 * BytesPerInt));
__ bind(continue_execution);
} else {
__ ldr(Roffset, Address(Rabcp, -3 * BytesPerInt), lt);
__ ldr(Roffset, Address(Rabcp, Rindex, lsl, LogBytesPerInt), ge);
}
__ byteswap_u32(Roffset, Rtemp, Rtemp2);
// load the next bytecode to R3_bytecode and advance Rbcp
__ ldrb(R3_bytecode, Address(Rbcp, Roffset, lsl, 0, pre_indexed));
__ dispatch_only(vtos);
}
void TemplateTable::lookupswitch() {
transition(itos, itos);
__ stop("lookupswitch bytecode should have been rewritten");
}
void TemplateTable::fast_linearswitch() {
transition(itos, vtos);
Label loop, found, default_case, continue_execution;
const Register Rkey = R0_tos;
const Register Rabcp = R2_tmp; // aligned bcp
const Register Rdefault = R3_tmp;
const Register Rcount = R4_tmp;
const Register Roffset = R5_tmp;
// bswap Rkey, so we can avoid bswapping the table entries
__ byteswap_u32(Rkey, R1_tmp, Rtemp);
// align bcp
__ add(Rtemp, Rbcp, 1 + (BytesPerInt-1));
__ align_reg(Rabcp, Rtemp, BytesPerInt);
// load default & counter
__ ldmia(Rabcp, RegisterSet(Rdefault) | RegisterSet(Rcount), writeback);
__ byteswap_u32(Rcount, R1_tmp, Rtemp);
__ cmp_32(Rcount, 0);
__ ldr(Rtemp, Address(Rabcp, 2*BytesPerInt, post_indexed), ne);
__ b(default_case, eq);
// table search
__ bind(loop);
__ cmp_32(Rtemp, Rkey);
__ b(found, eq);
__ subs(Rcount, Rcount, 1);
__ ldr(Rtemp, Address(Rabcp, 2*BytesPerInt, post_indexed), ne);
__ b(loop, ne);
// default case
__ bind(default_case);
__ profile_switch_default(R0_tmp);
__ mov(Roffset, Rdefault);
__ b(continue_execution);
// entry found -> get offset
__ bind(found);
// Rabcp is already incremented and points to the next entry
__ ldr_s32(Roffset, Address(Rabcp, -BytesPerInt));
if (ProfileInterpreter) {
// Calculate index of the selected case.
assert_different_registers(Roffset, Rcount, Rtemp, R0_tmp, R1_tmp, R2_tmp);
// align bcp
__ add(Rtemp, Rbcp, 1 + (BytesPerInt-1));
__ align_reg(R2_tmp, Rtemp, BytesPerInt);
// load number of cases
__ ldr_u32(R2_tmp, Address(R2_tmp, BytesPerInt));
__ byteswap_u32(R2_tmp, R1_tmp, Rtemp);
// Selected index = <number of cases> - <current loop count>
__ sub(R1_tmp, R2_tmp, Rcount);
__ profile_switch_case(R0_tmp, R1_tmp, Rtemp, R1_tmp);
}
// continue execution
__ bind(continue_execution);
__ byteswap_u32(Roffset, R1_tmp, Rtemp);
// load the next bytecode to R3_bytecode and advance Rbcp
__ ldrb(R3_bytecode, Address(Rbcp, Roffset, lsl, 0, pre_indexed));
__ dispatch_only(vtos);
}
void TemplateTable::fast_binaryswitch() {
transition(itos, vtos);
// Implementation using the following core algorithm:
//
// int binary_search(int key, LookupswitchPair* array, int n) {
// // Binary search according to "Methodik des Programmierens" by
// // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
// int i = 0;
// int j = n;
// while (i+1 < j) {
// // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
// // with Q: for all i: 0 <= i < n: key < a[i]
// // where a stands for the array and assuming that the (inexisting)
// // element a[n] is infinitely big.
// int h = (i + j) >> 1;
// // i < h < j
// if (key < array[h].fast_match()) {
// j = h;
// } else {
// i = h;
// }
// }
// // R: a[i] <= key < a[i+1] or Q
// // (i.e., if key is within array, i is the correct index)
// return i;
// }
// register allocation
const Register key = R0_tos; // already set (tosca)
const Register array = R1_tmp;
const Register i = R2_tmp;
const Register j = R3_tmp;
const Register h = R4_tmp;
const Register val = R5_tmp;
const Register temp1 = Rtemp;
const Register temp2 = LR_tmp;
const Register offset = R3_tmp;
// set 'array' = aligned bcp + 2 ints
__ add(temp1, Rbcp, 1 + (BytesPerInt-1) + 2*BytesPerInt);
__ align_reg(array, temp1, BytesPerInt);
// initialize i & j
__ mov(i, 0); // i = 0;
__ ldr_s32(j, Address(array, -BytesPerInt)); // j = length(array);
// Convert j into native byteordering
__ byteswap_u32(j, temp1, temp2);
// and start
Label entry;
__ b(entry);
// binary search loop
{ Label loop;
__ bind(loop);
// int h = (i + j) >> 1;
__ add(h, i, j); // h = i + j;
__ logical_shift_right(h, h, 1); // h = (i + j) >> 1;
// if (key < array[h].fast_match()) {
// j = h;
// } else {
// i = h;
// }
__ ldr_s32(val, Address(array, h, lsl, 1+LogBytesPerInt));
// Convert array[h].match to native byte-ordering before compare
__ byteswap_u32(val, temp1, temp2);
__ cmp_32(key, val);
__ mov(j, h, lt); // j = h if (key < array[h].fast_match())
__ mov(i, h, ge); // i = h if (key >= array[h].fast_match())
// while (i+1 < j)
__ bind(entry);
__ add(temp1, i, 1); // i+1
__ cmp(temp1, j); // i+1 < j
__ b(loop, lt);
}
// end of binary search, result index is i (must check again!)
Label default_case;
// Convert array[i].match to native byte-ordering before compare
__ ldr_s32(val, Address(array, i, lsl, 1+LogBytesPerInt));
__ byteswap_u32(val, temp1, temp2);
__ cmp_32(key, val);
__ b(default_case, ne);
// entry found
__ add(temp1, array, AsmOperand(i, lsl, 1+LogBytesPerInt));
__ ldr_s32(offset, Address(temp1, 1*BytesPerInt));
__ profile_switch_case(R0, i, R1, i);
__ byteswap_u32(offset, temp1, temp2);
__ ldrb(R3_bytecode, Address(Rbcp, offset, lsl, 0, pre_indexed));
__ dispatch_only(vtos);
// default case
__ bind(default_case);
__ profile_switch_default(R0);
__ ldr_s32(offset, Address(array, -2*BytesPerInt));
__ byteswap_u32(offset, temp1, temp2);
__ ldrb(R3_bytecode, Address(Rbcp, offset, lsl, 0, pre_indexed));
__ dispatch_only(vtos);
}
void TemplateTable::_return(TosState state) {
transition(state, state);
assert(_desc->calls_vm(), "inconsistent calls_vm information"); // call in remove_activation
if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
Label skip_register_finalizer;
assert(state == vtos, "only valid state");
__ ldr(R1, aaddress(0));
__ load_klass(Rtemp, R1);
__ ldr_u32(Rtemp, Address(Rtemp, Klass::access_flags_offset()));
__ tbz(Rtemp, exact_log2(JVM_ACC_HAS_FINALIZER), skip_register_finalizer);
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), R1);
__ bind(skip_register_finalizer);
}
// Narrow result if state is itos but result type is smaller.
// Need to narrow in the return bytecode rather than in generate_return_entry
// since compiled code callers expect the result to already be narrowed.
if (state == itos) {
__ narrow(R0_tos);
}
__ remove_activation(state, LR);
__ interp_verify_oop(R0_tos, state, __FILE__, __LINE__);
// According to interpreter calling conventions, result is returned in R0/R1,
// so ftos (S0) and dtos (D0) are moved to R0/R1.
// This conversion should be done after remove_activation, as it uses
// push(state) & pop(state) to preserve return value.
__ convert_tos_to_retval(state);
__ ret();
__ nop(); // to avoid filling CPU pipeline with invalid instructions
__ nop();
}
// ----------------------------------------------------------------------------
// Volatile variables demand their effects be made known to all CPU's in
// order. Store buffers on most chips allow reads & writes to reorder; the
// JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
// memory barrier (i.e., it's not sufficient that the interpreter does not
// reorder volatile references, the hardware also must not reorder them).
//
// According to the new Java Memory Model (JMM):
// (1) All volatiles are serialized wrt to each other.
// ALSO reads & writes act as aquire & release, so:
// (2) A read cannot let unrelated NON-volatile memory refs that happen after
// the read float up to before the read. It's OK for non-volatile memory refs
// that happen before the volatile read to float down below it.
// (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
// that happen BEFORE the write float down to after the write. It's OK for
// non-volatile memory refs that happen after the volatile write to float up
// before it.
//
// We only put in barriers around volatile refs (they are expensive), not
// _between_ memory refs (that would require us to track the flavor of the
// previous memory refs). Requirements (2) and (3) require some barriers
// before volatile stores and after volatile loads. These nearly cover
// requirement (1) but miss the volatile-store-volatile-load case. This final
// case is placed after volatile-stores although it could just as well go
// before volatile-loads.
void TemplateTable::volatile_barrier(MacroAssembler::Membar_mask_bits order_constraint,
Register tmp,
bool preserve_flags,
Register load_tgt) {
__ membar(order_constraint, tmp, preserve_flags, load_tgt);
}
// Blows all volatile registers: R0-R3, Rtemp, LR.
void TemplateTable::resolve_cache_and_index(int byte_no,
Register Rcache,
Register Rindex,
size_t index_size) {
assert_different_registers(Rcache, Rindex, Rtemp);
Label resolved;
Bytecodes::Code code = bytecode();
switch (code) {
case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
default: break;
}
assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
__ get_cache_and_index_and_bytecode_at_bcp(Rcache, Rindex, Rtemp, byte_no, 1, index_size);
__ cmp(Rtemp, code); // have we resolved this bytecode?
__ b(resolved, eq);
// resolve first time through
address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
__ mov(R1, code);
__ call_VM(noreg, entry, R1);
// Update registers with resolved info
__ get_cache_and_index_at_bcp(Rcache, Rindex, 1, index_size);
__ bind(resolved);
}
// The Rcache and Rindex registers must be set before call
void TemplateTable::load_field_cp_cache_entry(Register Rcache,
Register Rindex,
Register Roffset,
Register Rflags,
Register Robj,
bool is_static = false) {
assert_different_registers(Rcache, Rindex, Rtemp);
assert_different_registers(Roffset, Rflags, Robj, Rtemp);
ByteSize cp_base_offset = ConstantPoolCache::base_offset();
__ add(Rtemp, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
// Field offset
__ ldr(Roffset, Address(Rtemp,
cp_base_offset + ConstantPoolCacheEntry::f2_offset()));
// Flags
__ ldr_u32(Rflags, Address(Rtemp,
cp_base_offset + ConstantPoolCacheEntry::flags_offset()));
if (is_static) {
__ ldr(Robj, Address(Rtemp,
cp_base_offset + ConstantPoolCacheEntry::f1_offset()));
const int mirror_offset = in_bytes(Klass::java_mirror_offset());
__ ldr(Robj, Address(Robj, mirror_offset));
__ resolve_oop_handle(Robj);
}
}
// Blows all volatile registers: R0-R3, Rtemp, LR.
void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
Register method,
Register itable_index,
Register flags,
bool is_invokevirtual,
bool is_invokevfinal/*unused*/,
bool is_invokedynamic) {
// setup registers
const Register cache = R2_tmp;
const Register index = R3_tmp;
const Register temp_reg = Rtemp;
assert_different_registers(cache, index, temp_reg);
assert_different_registers(method, itable_index, temp_reg);
// determine constant pool cache field offsets
assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
const int method_offset = in_bytes(
ConstantPoolCache::base_offset() +
((byte_no == f2_byte)
? ConstantPoolCacheEntry::f2_offset()
: ConstantPoolCacheEntry::f1_offset()
)
);
const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
ConstantPoolCacheEntry::flags_offset());
// access constant pool cache fields
const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
ConstantPoolCacheEntry::f2_offset());
size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
resolve_cache_and_index(byte_no, cache, index, index_size);
__ add(temp_reg, cache, AsmOperand(index, lsl, LogBytesPerWord));
__ ldr(method, Address(temp_reg, method_offset));
if (itable_index != noreg) {
__ ldr(itable_index, Address(temp_reg, index_offset));
}
__ ldr_u32(flags, Address(temp_reg, flags_offset));
}
// The registers cache and index expected to be set before call, and should not be Rtemp.
// Blows volatile registers R0-R3, Rtemp, LR,
// except cache and index registers which are preserved.
void TemplateTable::jvmti_post_field_access(Register Rcache,
Register Rindex,
bool is_static,
bool has_tos) {
assert_different_registers(Rcache, Rindex, Rtemp);
if (__ can_post_field_access()) {
// Check to see if a field access watch has been set before we take
// the time to call into the VM.
Label Lcontinue;
__ ldr_global_s32(Rtemp, (address)JvmtiExport::get_field_access_count_addr());
__ cbz(Rtemp, Lcontinue);
// cache entry pointer
__ add(R2, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
__ add(R2, R2, in_bytes(ConstantPoolCache::base_offset()));
if (is_static) {
__ mov(R1, 0); // NULL object reference
} else {
__ pop(atos); // Get the object
__ mov(R1, R0_tos);
__ verify_oop(R1);
__ push(atos); // Restore stack state
}
// R1: object pointer or NULL
// R2: cache entry pointer
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access),
R1, R2);
__ get_cache_and_index_at_bcp(Rcache, Rindex, 1);
__ bind(Lcontinue);
}
}
void TemplateTable::pop_and_check_object(Register r) {
__ pop_ptr(r);
__ null_check(r, Rtemp); // for field access must check obj.
__ verify_oop(r);
}
void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
transition(vtos, vtos);
const Register Roffset = R2_tmp;
const Register Robj = R3_tmp;
const Register Rcache = R4_tmp;
const Register Rflagsav = Rtmp_save0; // R4/R19
const Register Rindex = R5_tmp;
const Register Rflags = R5_tmp;
resolve_cache_and_index(byte_no, Rcache, Rindex, sizeof(u2));
jvmti_post_field_access(Rcache, Rindex, is_static, false);
load_field_cp_cache_entry(Rcache, Rindex, Roffset, Rflags, Robj, is_static);
__ mov(Rflagsav, Rflags);
if (!is_static) pop_and_check_object(Robj);
Label Done, Lint, Ltable, shouldNotReachHere;
Label Lbtos, Lztos, Lctos, Lstos, Litos, Lltos, Lftos, Ldtos, Latos;
// compute type
__ logical_shift_right(Rflags, Rflags, ConstantPoolCacheEntry::tos_state_shift);
// Make sure we don't need to mask flags after the above shift
ConstantPoolCacheEntry::verify_tos_state_shift();
// There are actually two versions of implementation of getfield/getstatic:
//
// 1) Table switch using add(PC,...) instruction (fast_version)
// 2) Table switch using ldr(PC,...) instruction
//
// First version requires fixed size of code block for each case and
// can not be used in RewriteBytecodes and VerifyOops
// modes.
// Size of fixed size code block for fast_version
const int log_max_block_size = 3;
const int max_block_size = 1 << log_max_block_size;
// Decide if fast version is enabled
bool fast_version = (is_static || !RewriteBytecodes) && !VerifyOops;
// On 32-bit ARM atos and itos cases can be merged only for fast version, because
// atos requires additional processing in slow version.
bool atos_merged_with_itos = fast_version;
assert(number_of_states == 10, "number of tos states should be equal to 9");
__ cmp(Rflags, itos);
if(atos_merged_with_itos) {
__ cmp(Rflags, atos, ne);
}
// table switch by type
if(fast_version) {
__ add(PC, PC, AsmOperand(Rflags, lsl, log_max_block_size + Assembler::LogInstructionSize), ne);
} else {
__ ldr(PC, Address(PC, Rflags, lsl, LogBytesPerWord), ne);
}
// jump to itos/atos case
__ b(Lint);
// table with addresses for slow version
if (fast_version) {
// nothing to do
} else {
__ bind(Ltable);
__ emit_address(Lbtos);
__ emit_address(Lztos);
__ emit_address(Lctos);
__ emit_address(Lstos);
__ emit_address(Litos);
__ emit_address(Lltos);
__ emit_address(Lftos);
__ emit_address(Ldtos);
__ emit_address(Latos);
}
#ifdef ASSERT
int seq = 0;
#endif
// btos
{
assert(btos == seq++, "btos has unexpected value");
FixedSizeCodeBlock btos_block(_masm, max_block_size, fast_version);
__ bind(Lbtos);
__ access_load_at(T_BYTE, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg);
__ push(btos);
// Rewrite bytecode to be faster
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_bgetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
// ztos (same as btos for getfield)
{
assert(ztos == seq++, "btos has unexpected value");
FixedSizeCodeBlock ztos_block(_masm, max_block_size, fast_version);
__ bind(Lztos);
__ access_load_at(T_BOOLEAN, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg);
__ push(ztos);
// Rewrite bytecode to be faster (use btos fast getfield)
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_bgetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
// ctos
{
assert(ctos == seq++, "ctos has unexpected value");
FixedSizeCodeBlock ctos_block(_masm, max_block_size, fast_version);
__ bind(Lctos);
__ access_load_at(T_CHAR, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg);
__ push(ctos);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_cgetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
// stos
{
assert(stos == seq++, "stos has unexpected value");
FixedSizeCodeBlock stos_block(_masm, max_block_size, fast_version);
__ bind(Lstos);
__ access_load_at(T_SHORT, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg);
__ push(stos);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_sgetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
// itos
{
assert(itos == seq++, "itos has unexpected value");
FixedSizeCodeBlock itos_block(_masm, max_block_size, fast_version);
__ bind(Litos);
__ b(shouldNotReachHere);
}
// ltos
{
assert(ltos == seq++, "ltos has unexpected value");
FixedSizeCodeBlock ltos_block(_masm, max_block_size, fast_version);
__ bind(Lltos);
__ access_load_at(T_LONG, IN_HEAP, Address(Robj, Roffset), noreg /* ltos */, noreg, noreg, noreg);
__ push(ltos);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_lgetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
// ftos
{
assert(ftos == seq++, "ftos has unexpected value");
FixedSizeCodeBlock ftos_block(_masm, max_block_size, fast_version);
__ bind(Lftos);
// floats and ints are placed on stack in same way, so
// we can use push(itos) to transfer value without using VFP
__ access_load_at(T_INT, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg);
__ push(itos);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_fgetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
// dtos
{
assert(dtos == seq++, "dtos has unexpected value");
FixedSizeCodeBlock dtos_block(_masm, max_block_size, fast_version);
__ bind(Ldtos);
// doubles and longs are placed on stack in the same way, so
// we can use push(ltos) to transfer value without using VFP
__ access_load_at(T_LONG, IN_HEAP, Address(Robj, Roffset), noreg /* ltos */, noreg, noreg, noreg);
__ push(ltos);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_dgetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
// atos
{
assert(atos == seq++, "atos has unexpected value");
// atos case for slow version on 32-bit ARM
if(!atos_merged_with_itos) {
__ bind(Latos);
do_oop_load(_masm, R0_tos, Address(Robj, Roffset));
__ push(atos);
// Rewrite bytecode to be faster
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_agetfield, R0_tmp, Rtemp);
}
__ b(Done);
}
}
assert(vtos == seq++, "vtos has unexpected value");
__ bind(shouldNotReachHere);
__ should_not_reach_here();
// itos and atos cases are frequent so it makes sense to move them out of table switch
// atos case can be merged with itos case (and thus moved out of table switch) on 32-bit ARM, fast version only
__ bind(Lint);
__ access_load_at(T_INT, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg);
__ push(itos);
// Rewrite bytecode to be faster
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_igetfield, R0_tmp, Rtemp);
}
__ bind(Done);
// Check for volatile field
Label notVolatile;
__ tbz(Rflagsav, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
volatile_barrier(MacroAssembler::Membar_mask_bits(MacroAssembler::LoadLoad | MacroAssembler::LoadStore), Rtemp);
__ bind(notVolatile);
}
void TemplateTable::getfield(int byte_no) {
getfield_or_static(byte_no, false);
}
void TemplateTable::nofast_getfield(int byte_no) {
getfield_or_static(byte_no, false, may_not_rewrite);
}
void TemplateTable::getstatic(int byte_no) {
getfield_or_static(byte_no, true);
}
// The registers cache and index expected to be set before call, and should not be R1 or Rtemp.
// Blows volatile registers R0-R3, Rtemp, LR,
// except cache and index registers which are preserved.
void TemplateTable::jvmti_post_field_mod(Register Rcache, Register Rindex, bool is_static) {
ByteSize cp_base_offset = ConstantPoolCache::base_offset();
assert_different_registers(Rcache, Rindex, R1, Rtemp);
if (__ can_post_field_modification()) {
// Check to see if a field modification watch has been set before we take
// the time to call into the VM.
Label Lcontinue;
__ ldr_global_s32(Rtemp, (address)JvmtiExport::get_field_modification_count_addr());
__ cbz(Rtemp, Lcontinue);
if (is_static) {
// Life is simple. Null out the object pointer.
__ mov(R1, 0);
} else {
// Life is harder. The stack holds the value on top, followed by the object.
// We don't know the size of the value, though; it could be one or two words
// depending on its type. As a result, we must find the type to determine where
// the object is.
__ add(Rtemp, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
__ ldr_u32(Rtemp, Address(Rtemp, cp_base_offset + ConstantPoolCacheEntry::flags_offset()));
__ logical_shift_right(Rtemp, Rtemp, ConstantPoolCacheEntry::tos_state_shift);
// Make sure we don't need to mask Rtemp after the above shift
ConstantPoolCacheEntry::verify_tos_state_shift();
__ cmp(Rtemp, ltos);
__ cond_cmp(Rtemp, dtos, ne);
// two word value (ltos/dtos)
__ ldr(R1, Address(SP, Interpreter::expr_offset_in_bytes(2)), eq);
// one word value (not ltos, dtos)
__ ldr(R1, Address(SP, Interpreter::expr_offset_in_bytes(1)), ne);
}
// cache entry pointer
__ add(R2, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
__ add(R2, R2, in_bytes(cp_base_offset));
// object (tos)
__ mov(R3, Rstack_top);
// R1: object pointer set up above (NULL if static)
// R2: cache entry pointer
// R3: value object on the stack
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification),
R1, R2, R3);
__ get_cache_and_index_at_bcp(Rcache, Rindex, 1);
__ bind(Lcontinue);
}
}
void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
transition(vtos, vtos);
const Register Roffset = R2_tmp;
const Register Robj = R3_tmp;
const Register Rcache = R4_tmp;
const Register Rflagsav = Rtmp_save0; // R4/R19
const Register Rindex = R5_tmp;
const Register Rflags = R5_tmp;
resolve_cache_and_index(byte_no, Rcache, Rindex, sizeof(u2));
jvmti_post_field_mod(Rcache, Rindex, is_static);
load_field_cp_cache_entry(Rcache, Rindex, Roffset, Rflags, Robj, is_static);
// Check for volatile field
Label notVolatile;
__ mov(Rflagsav, Rflags);
__ tbz(Rflagsav, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
volatile_barrier(MacroAssembler::Membar_mask_bits(MacroAssembler::StoreStore | MacroAssembler::LoadStore), Rtemp);
__ bind(notVolatile);
Label Done, Lint, shouldNotReachHere;
Label Ltable, Lbtos, Lztos, Lctos, Lstos, Litos, Lltos, Lftos, Ldtos, Latos;
// compute type
__ logical_shift_right(Rflags, Rflags, ConstantPoolCacheEntry::tos_state_shift);
// Make sure we don't need to mask flags after the above shift
ConstantPoolCacheEntry::verify_tos_state_shift();
// There are actually two versions of implementation of putfield/putstatic:
//
// 32-bit ARM:
// 1) Table switch using add(PC,...) instruction (fast_version)
// 2) Table switch using ldr(PC,...) instruction
//
// First version requires fixed size of code block for each case and
// can not be used in RewriteBytecodes and VerifyOops
// modes.
// Size of fixed size code block for fast_version (in instructions)
const int log_max_block_size = 3;
const int max_block_size = 1 << log_max_block_size;
// Decide if fast version is enabled
bool fast_version = (is_static || !RewriteBytecodes) && !VerifyOops;
assert(number_of_states == 10, "number of tos states should be equal to 9");
// itos case is frequent and is moved outside table switch
__ cmp(Rflags, itos);
// table switch by type
if (fast_version) {
__ add(PC, PC, AsmOperand(Rflags, lsl, log_max_block_size + Assembler::LogInstructionSize), ne);
} else {
__ ldr(PC, Address(PC, Rflags, lsl, LogBytesPerWord), ne);
}
// jump to itos case
__ b(Lint);
// table with addresses for slow version
if (fast_version) {
// nothing to do
} else {
__ bind(Ltable);
__ emit_address(Lbtos);
__ emit_address(Lztos);
__ emit_address(Lctos);
__ emit_address(Lstos);
__ emit_address(Litos);
__ emit_address(Lltos);
__ emit_address(Lftos);
__ emit_address(Ldtos);
__ emit_address(Latos);
}
#ifdef ASSERT
int seq = 0;
#endif
// btos
{
assert(btos == seq++, "btos has unexpected value");
FixedSizeCodeBlock btos_block(_masm, max_block_size, fast_version);
__ bind(Lbtos);
__ pop(btos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_BYTE, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_bputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
// ztos
{
assert(ztos == seq++, "ztos has unexpected value");
FixedSizeCodeBlock ztos_block(_masm, max_block_size, fast_version);
__ bind(Lztos);
__ pop(ztos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_BOOLEAN, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_zputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
// ctos
{
assert(ctos == seq++, "ctos has unexpected value");
FixedSizeCodeBlock ctos_block(_masm, max_block_size, fast_version);
__ bind(Lctos);
__ pop(ctos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_CHAR, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_cputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
// stos
{
assert(stos == seq++, "stos has unexpected value");
FixedSizeCodeBlock stos_block(_masm, max_block_size, fast_version);
__ bind(Lstos);
__ pop(stos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_SHORT, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_sputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
// itos
{
assert(itos == seq++, "itos has unexpected value");
FixedSizeCodeBlock itos_block(_masm, max_block_size, fast_version);
__ bind(Litos);
__ b(shouldNotReachHere);
}
// ltos
{
assert(ltos == seq++, "ltos has unexpected value");
FixedSizeCodeBlock ltos_block(_masm, max_block_size, fast_version);
__ bind(Lltos);
__ pop(ltos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_LONG, IN_HEAP, Address(Robj, Roffset), noreg /* ltos */, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_lputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
// ftos
{
assert(ftos == seq++, "ftos has unexpected value");
FixedSizeCodeBlock ftos_block(_masm, max_block_size, fast_version);
__ bind(Lftos);
// floats and ints are placed on stack in the same way, so
// we can use pop(itos) to transfer value without using VFP
__ pop(itos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_INT, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_fputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
// dtos
{
assert(dtos == seq++, "dtos has unexpected value");
FixedSizeCodeBlock dtos_block(_masm, max_block_size, fast_version);
__ bind(Ldtos);
// doubles and longs are placed on stack in the same way, so
// we can use pop(ltos) to transfer value without using VFP
__ pop(ltos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_LONG, IN_HEAP, Address(Robj, Roffset), noreg /* ltos */, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_dputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
// atos
{
assert(atos == seq++, "dtos has unexpected value");
__ bind(Latos);
__ pop(atos);
if (!is_static) pop_and_check_object(Robj);
// Store into the field
do_oop_store(_masm, Address(Robj, Roffset), R0_tos, Rtemp, R1_tmp, R5_tmp, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_aputfield, R0_tmp, Rtemp, true, byte_no);
}
__ b(Done);
}
__ bind(shouldNotReachHere);
__ should_not_reach_here();
// itos case is frequent and is moved outside table switch
__ bind(Lint);
__ pop(itos);
if (!is_static) pop_and_check_object(Robj);
__ access_store_at(T_INT, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg, false);
if (!is_static && rc == may_rewrite) {
patch_bytecode(Bytecodes::_fast_iputfield, R0_tmp, Rtemp, true, byte_no);
}
__ bind(Done);
Label notVolatile2;
if (is_static) {
// Just check for volatile. Memory barrier for static final field
// is handled by class initialization.
__ tbz(Rflagsav, ConstantPoolCacheEntry::is_volatile_shift, notVolatile2);
volatile_barrier(MacroAssembler::StoreLoad, Rtemp);
__ bind(notVolatile2);
} else {
// Check for volatile field and final field
Label skipMembar;
__ tst(Rflagsav, 1 << ConstantPoolCacheEntry::is_volatile_shift |
1 << ConstantPoolCacheEntry::is_final_shift);
__ b(skipMembar, eq);
__ tbz(Rflagsav, ConstantPoolCacheEntry::is_volatile_shift, notVolatile2);
// StoreLoad barrier after volatile field write
volatile_barrier(MacroAssembler::StoreLoad, Rtemp);
__ b(skipMembar);
// StoreStore barrier after final field write
__ bind(notVolatile2);
volatile_barrier(MacroAssembler::StoreStore, Rtemp);
__ bind(skipMembar);
}
}
void TemplateTable::putfield(int byte_no) {
putfield_or_static(byte_no, false);
}
void TemplateTable::nofast_putfield(int byte_no) {
putfield_or_static(byte_no, false, may_not_rewrite);
}
void TemplateTable::putstatic(int byte_no) {
putfield_or_static(byte_no, true);
}
void TemplateTable::jvmti_post_fast_field_mod() {
// This version of jvmti_post_fast_field_mod() is not used on ARM
Unimplemented();
}
// Blows volatile registers R0-R3, Rtemp, LR,
// but preserves tosca with the given state.
void TemplateTable::jvmti_post_fast_field_mod(TosState state) {
if (__ can_post_field_modification()) {
// Check to see if a field modification watch has been set before we take
// the time to call into the VM.
Label done;
__ ldr_global_s32(R2, (address)JvmtiExport::get_field_modification_count_addr());
__ cbz(R2, done);
__ pop_ptr(R3); // copy the object pointer from tos
__ verify_oop(R3);
__ push_ptr(R3); // put the object pointer back on tos
__ push(state); // save value on the stack
// access constant pool cache entry
__ get_cache_entry_pointer_at_bcp(R2, R1, 1);
__ mov(R1, R3);
assert(Interpreter::expr_offset_in_bytes(0) == 0, "adjust this code");
__ mov(R3, Rstack_top); // put tos addr into R3
// R1: object pointer copied above
// R2: cache entry pointer
// R3: jvalue object on the stack
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), R1, R2, R3);
__ pop(state); // restore value
__ bind(done);
}
}
void TemplateTable::fast_storefield(TosState state) {
transition(state, vtos);
ByteSize base = ConstantPoolCache::base_offset();
jvmti_post_fast_field_mod(state);
const Register Rcache = R2_tmp;
const Register Rindex = R3_tmp;
const Register Roffset = R3_tmp;
const Register Rflags = Rtmp_save0; // R4/R19
const Register Robj = R5_tmp;
// access constant pool cache
__ get_cache_and_index_at_bcp(Rcache, Rindex, 1);
__ add(Rcache, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
// load flags to test volatile
__ ldr_u32(Rflags, Address(Rcache, base + ConstantPoolCacheEntry::flags_offset()));
// replace index with field offset from cache entry
__ ldr(Roffset, Address(Rcache, base + ConstantPoolCacheEntry::f2_offset()));
// Check for volatile store
Label notVolatile;
__ tbz(Rflags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
volatile_barrier(MacroAssembler::Membar_mask_bits(MacroAssembler::StoreStore | MacroAssembler::LoadStore), Rtemp);
__ bind(notVolatile);
// Get object from stack
pop_and_check_object(Robj);
Address addr = Address(Robj, Roffset);
// access field
switch (bytecode()) {
case Bytecodes::_fast_zputfield:
__ access_store_at(T_BOOLEAN, IN_HEAP, addr, R0_tos, noreg, noreg, noreg, false);
break;
case Bytecodes::_fast_bputfield:
__ access_store_at(T_BYTE, IN_HEAP, addr, R0_tos, noreg, noreg, noreg, false);
break;
case Bytecodes::_fast_sputfield:
__ access_store_at(T_SHORT, IN_HEAP, addr, R0_tos, noreg, noreg, noreg, false);
break;
case Bytecodes::_fast_cputfield:
__ access_store_at(T_CHAR, IN_HEAP, addr, R0_tos, noreg, noreg, noreg,false);
break;
case Bytecodes::_fast_iputfield:
__ access_store_at(T_INT, IN_HEAP, addr, R0_tos, noreg, noreg, noreg, false);
break;
case Bytecodes::_fast_lputfield:
__ access_store_at(T_LONG, IN_HEAP, addr, noreg, noreg, noreg, noreg, false);
break;
case Bytecodes::_fast_fputfield:
__ access_store_at(T_FLOAT, IN_HEAP, addr, noreg, noreg, noreg, noreg, false);
break;
case Bytecodes::_fast_dputfield:
__ access_store_at(T_DOUBLE, IN_HEAP, addr, noreg, noreg, noreg, noreg, false);
break;
case Bytecodes::_fast_aputfield:
do_oop_store(_masm, addr, R0_tos, Rtemp, R1_tmp, R2_tmp, false);
break;
default:
ShouldNotReachHere();
}
Label notVolatile2;
Label skipMembar;
__ tst(Rflags, 1 << ConstantPoolCacheEntry::is_volatile_shift |
1 << ConstantPoolCacheEntry::is_final_shift);
__ b(skipMembar, eq);
__ tbz(Rflags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile2);
// StoreLoad barrier after volatile field write
volatile_barrier(MacroAssembler::StoreLoad, Rtemp);
__ b(skipMembar);
// StoreStore barrier after final field write
__ bind(notVolatile2);
volatile_barrier(MacroAssembler::StoreStore, Rtemp);
__ bind(skipMembar);
}
void TemplateTable::fast_accessfield(TosState state) {
transition(atos, state);
// do the JVMTI work here to avoid disturbing the register state below
if (__ can_post_field_access()) {
// Check to see if a field access watch has been set before we take
// the time to call into the VM.
Label done;
__ ldr_global_s32(R2, (address) JvmtiExport::get_field_access_count_addr());
__ cbz(R2, done);
// access constant pool cache entry
__ get_cache_entry_pointer_at_bcp(R2, R1, 1);
__ push_ptr(R0_tos); // save object pointer before call_VM() clobbers it
__ verify_oop(R0_tos);
__ mov(R1, R0_tos);
// R1: object pointer copied above
// R2: cache entry pointer
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), R1, R2);
__ pop_ptr(R0_tos); // restore object pointer
__ bind(done);
}
const Register Robj = R0_tos;
const Register Rcache = R2_tmp;
const Register Rflags = R2_tmp;
const Register Rindex = R3_tmp;
const Register Roffset = R3_tmp;
// access constant pool cache
__ get_cache_and_index_at_bcp(Rcache, Rindex, 1);
// replace index with field offset from cache entry
__ add(Rtemp, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
__ ldr(Roffset, Address(Rtemp, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset()));
// load flags to test volatile
__ ldr_u32(Rflags, Address(Rtemp, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
__ verify_oop(Robj);
__ null_check(Robj, Rtemp);
Address addr = Address(Robj, Roffset);
// access field
switch (bytecode()) {
case Bytecodes::_fast_bgetfield:
__ access_load_at(T_BYTE, IN_HEAP, addr, R0_tos, noreg, noreg, noreg);
break;
case Bytecodes::_fast_sgetfield:
__ access_load_at(T_SHORT, IN_HEAP, addr, R0_tos, noreg, noreg, noreg);
break;
case Bytecodes::_fast_cgetfield:
__ access_load_at(T_CHAR, IN_HEAP, addr, R0_tos, noreg, noreg, noreg);
break;
case Bytecodes::_fast_igetfield:
__ access_load_at(T_INT, IN_HEAP, addr, R0_tos, noreg, noreg, noreg);
break;
case Bytecodes::_fast_lgetfield:
__ access_load_at(T_LONG, IN_HEAP, addr, noreg, noreg, noreg, noreg);
break;
case Bytecodes::_fast_fgetfield:
__ access_load_at(T_FLOAT, IN_HEAP, addr, noreg, noreg, noreg, noreg);
break;
case Bytecodes::_fast_dgetfield:
__ access_load_at(T_DOUBLE, IN_HEAP, addr, noreg, noreg, noreg, noreg);
break;
case Bytecodes::_fast_agetfield:
do_oop_load(_masm, R0_tos, addr);
__ verify_oop(R0_tos);
break;
default:
ShouldNotReachHere();
}
// Check for volatile load
Label notVolatile;
__ tbz(Rflags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
volatile_barrier(MacroAssembler::Membar_mask_bits(MacroAssembler::LoadLoad | MacroAssembler::LoadStore), Rtemp);
__ bind(notVolatile);
}
void TemplateTable::fast_xaccess(TosState state) {
transition(vtos, state);
const Register Robj = R1_tmp;
const Register Rcache = R2_tmp;
const Register Rindex = R3_tmp;
const Register Roffset = R3_tmp;
const Register Rflags = R4_tmp;
Label done;
// get receiver
__ ldr(Robj, aaddress(0));
// access constant pool cache
__ get_cache_and_index_at_bcp(Rcache, Rindex, 2);
__ add(Rtemp, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
__ ldr(Roffset, Address(Rtemp, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset()));
// load flags to test volatile
__ ldr_u32(Rflags, Address(Rtemp, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
// make sure exception is reported in correct bcp range (getfield is next instruction)
__ add(Rbcp, Rbcp, 1);
__ null_check(Robj, Rtemp);
__ sub(Rbcp, Rbcp, 1);
if (state == itos) {
__ access_load_at(T_INT, IN_HEAP, Address(Robj, Roffset), R0_tos, noreg, noreg, noreg);
} else if (state == atos) {
do_oop_load(_masm, R0_tos, Address(Robj, Roffset));
__ verify_oop(R0_tos);
} else if (state == ftos) {
#ifdef __SOFTFP__
__ ldr(R0_tos, Address(Robj, Roffset));
#else
__ access_load_at(T_FLOAT, IN_HEAP, Address(Robj, Roffset), noreg /* ftos */, noreg, noreg, noreg);
#endif // __SOFTFP__
} else {
ShouldNotReachHere();
}
// Check for volatile load
Label notVolatile;
__ tbz(Rflags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
volatile_barrier(MacroAssembler::Membar_mask_bits(MacroAssembler::LoadLoad | MacroAssembler::LoadStore), Rtemp);
__ bind(notVolatile);
__ bind(done);
}
//----------------------------------------------------------------------------------------------------
// Calls
void TemplateTable::count_calls(Register method, Register temp) {
// implemented elsewhere
ShouldNotReachHere();
}
void TemplateTable::prepare_invoke(int byte_no,
Register method, // linked method (or i-klass)
Register index, // itable index, MethodType, etc.
Register recv, // if caller wants to see it
Register flags // if caller wants to test it
) {
// determine flags
const Bytecodes::Code code = bytecode();
const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
const bool is_invokehandle = code == Bytecodes::_invokehandle;
const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
const bool is_invokespecial = code == Bytecodes::_invokespecial;
const bool load_receiver = (recv != noreg);
assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
assert(recv == noreg || recv == R2, "");
assert(flags == noreg || flags == R3, "");
// setup registers & access constant pool cache
if (recv == noreg) recv = R2;
if (flags == noreg) flags = R3;
const Register temp = Rtemp;
const Register ret_type = R1_tmp;
assert_different_registers(method, index, flags, recv, LR, ret_type, temp);
// save 'interpreter return address'
__ save_bcp();
load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
// maybe push extra argument
if (is_invokedynamic || is_invokehandle) {
Label L_no_push;
__ tbz(flags, ConstantPoolCacheEntry::has_appendix_shift, L_no_push);
__ mov(temp, index);
__ load_resolved_reference_at_index(index, temp);
__ verify_oop(index);
__ push_ptr(index); // push appendix (MethodType, CallSite, etc.)
__ bind(L_no_push);
}
// load receiver if needed (after extra argument is pushed so parameter size is correct)
if (load_receiver) {
__ andr(temp, flags, (uintx)ConstantPoolCacheEntry::parameter_size_mask); // get parameter size
Address recv_addr = __ receiver_argument_address(Rstack_top, temp, recv);
__ ldr(recv, recv_addr);
__ verify_oop(recv);
}
// compute return type
__ logical_shift_right(ret_type, flags, ConstantPoolCacheEntry::tos_state_shift);
// Make sure we don't need to mask flags after the above shift
ConstantPoolCacheEntry::verify_tos_state_shift();
// load return address
{ const address table = (address) Interpreter::invoke_return_entry_table_for(code);
__ mov_slow(temp, table);
__ ldr(LR, Address::indexed_ptr(temp, ret_type));
}
}
void TemplateTable::invokevirtual_helper(Register index,
Register recv,
Register flags) {
const Register recv_klass = R2_tmp;
assert_different_registers(index, recv, flags, Rtemp);
assert_different_registers(index, recv_klass, R0_tmp, Rtemp);
// Test for an invoke of a final method
Label notFinal;
__ tbz(flags, ConstantPoolCacheEntry::is_vfinal_shift, notFinal);
assert(index == Rmethod, "Method* must be Rmethod, for interpreter calling convention");
// do the call - the index is actually the method to call
// It's final, need a null check here!
__ null_check(recv, Rtemp);
// profile this call
__ profile_final_call(R0_tmp);
__ jump_from_interpreted(Rmethod);
__ bind(notFinal);
// get receiver klass
__ null_check(recv, Rtemp, oopDesc::klass_offset_in_bytes());
__ load_klass(recv_klass, recv);
// profile this call
__ profile_virtual_call(R0_tmp, recv_klass);
// get target Method* & entry point
const int base = in_bytes(Klass::vtable_start_offset());
assert(vtableEntry::size() == 1, "adjust the scaling in the code below");
__ add(Rtemp, recv_klass, AsmOperand(index, lsl, LogHeapWordSize));
__ ldr(Rmethod, Address(Rtemp, base + vtableEntry::method_offset_in_bytes()));
__ jump_from_interpreted(Rmethod);
}
void TemplateTable::invokevirtual(int byte_no) {
transition(vtos, vtos);
assert(byte_no == f2_byte, "use this argument");
const Register Rrecv = R2_tmp;
const Register Rflags = R3_tmp;
prepare_invoke(byte_no, Rmethod, noreg, Rrecv, Rflags);
// Rmethod: index
// Rrecv: receiver
// Rflags: flags
// LR: return address
invokevirtual_helper(Rmethod, Rrecv, Rflags);
}
void TemplateTable::invokespecial(int byte_no) {
transition(vtos, vtos);
assert(byte_no == f1_byte, "use this argument");
const Register Rrecv = R2_tmp;
prepare_invoke(byte_no, Rmethod, noreg, Rrecv);
__ verify_oop(Rrecv);
__ null_check(Rrecv, Rtemp);
// do the call
__ profile_call(Rrecv);
__ jump_from_interpreted(Rmethod);
}
void TemplateTable::invokestatic(int byte_no) {
transition(vtos, vtos);
assert(byte_no == f1_byte, "use this argument");
prepare_invoke(byte_no, Rmethod);
// do the call
__ profile_call(R2_tmp);
__ jump_from_interpreted(Rmethod);
}
void TemplateTable::fast_invokevfinal(int byte_no) {
transition(vtos, vtos);
assert(byte_no == f2_byte, "use this argument");
__ stop("fast_invokevfinal is not used on ARM");
}
void TemplateTable::invokeinterface(int byte_no) {
transition(vtos, vtos);
assert(byte_no == f1_byte, "use this argument");
const Register Ritable = R1_tmp;
const Register Rrecv = R2_tmp;
const Register Rinterf = R5_tmp;
const Register Rindex = R4_tmp;
const Register Rflags = R3_tmp;
const Register Rklass = R2_tmp; // Note! Same register with Rrecv
prepare_invoke(byte_no, Rinterf, Rmethod, Rrecv, Rflags);
// First check for Object case, then private interface method,
// then regular interface method.
// Special case of invokeinterface called for virtual method of
// java.lang.Object. See cpCache.cpp for details.
Label notObjectMethod;
__ tbz(Rflags, ConstantPoolCacheEntry::is_forced_virtual_shift, notObjectMethod);
invokevirtual_helper(Rmethod, Rrecv, Rflags);
__ bind(notObjectMethod);
// Get receiver klass into Rklass - also a null check
__ load_klass(Rklass, Rrecv);
// Check for private method invocation - indicated by vfinal
Label no_such_interface;
Label notVFinal;
__ tbz(Rflags, ConstantPoolCacheEntry::is_vfinal_shift, notVFinal);
Label subtype;
__ check_klass_subtype(Rklass, Rinterf, R1_tmp, R3_tmp, noreg, subtype);
// If we get here the typecheck failed
__ b(no_such_interface);
__ bind(subtype);
// do the call
__ profile_final_call(R0_tmp);
__ jump_from_interpreted(Rmethod);
__ bind(notVFinal);
// Receiver subtype check against REFC.
__ lookup_interface_method(// inputs: rec. class, interface
Rklass, Rinterf, noreg,
// outputs: scan temp. reg1, scan temp. reg2
noreg, Ritable, Rtemp,
no_such_interface);
// profile this call
__ profile_virtual_call(R0_tmp, Rklass);
// Get declaring interface class from method
__ ldr(Rtemp, Address(Rmethod, Method::const_offset()));
__ ldr(Rtemp, Address(Rtemp, ConstMethod::constants_offset()));
__ ldr(Rinterf, Address(Rtemp, ConstantPool::pool_holder_offset_in_bytes()));
// Get itable index from method
__ ldr_s32(Rtemp, Address(Rmethod, Method::itable_index_offset()));
__ add(Rtemp, Rtemp, (-Method::itable_index_max)); // small negative constant is too large for an immediate on arm32
__ neg(Rindex, Rtemp);
__ lookup_interface_method(// inputs: rec. class, interface
Rklass, Rinterf, Rindex,
// outputs: scan temp. reg1, scan temp. reg2
Rmethod, Ritable, Rtemp,
no_such_interface);
// Rmethod: Method* to call
// Check for abstract method error
// Note: This should be done more efficiently via a throw_abstract_method_error
// interpreter entry point and a conditional jump to it in case of a null
// method.
{ Label L;
__ cbnz(Rmethod, L);
// throw exception
// note: must restore interpreter registers to canonical
// state for exception handling to work correctly!
__ restore_method();
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
// the call_VM checks for exception, so we should never return here.
__ should_not_reach_here();
__ bind(L);
}
// do the call
__ jump_from_interpreted(Rmethod);
// throw exception
__ bind(no_such_interface);
__ restore_method();
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeError));
// the call_VM checks for exception, so we should never return here.
__ should_not_reach_here();
}
void TemplateTable::invokehandle(int byte_no) {
transition(vtos, vtos);
const Register Rrecv = R2_tmp;
const Register Rmtype = R4_tmp;
const Register R5_method = R5_tmp; // can't reuse Rmethod!
prepare_invoke(byte_no, R5_method, Rmtype, Rrecv);
__ null_check(Rrecv, Rtemp);
// Rmtype: MethodType object (from cpool->resolved_references[f1], if necessary)
// Rmethod: MH.invokeExact_MT method (from f2)
// Note: Rmtype is already pushed (if necessary) by prepare_invoke
// do the call
__ profile_final_call(R3_tmp); // FIXME: profile the LambdaForm also
__ mov(Rmethod, R5_method);
__ jump_from_interpreted(Rmethod);
}
void TemplateTable::invokedynamic(int byte_no) {
transition(vtos, vtos);
const Register Rcallsite = R4_tmp;
const Register R5_method = R5_tmp; // can't reuse Rmethod!
prepare_invoke(byte_no, R5_method, Rcallsite);
// Rcallsite: CallSite object (from cpool->resolved_references[f1])
// Rmethod: MH.linkToCallSite method (from f2)
// Note: Rcallsite is already pushed by prepare_invoke
if (ProfileInterpreter) {
__ profile_call(R2_tmp);
}
// do the call
__ mov(Rmethod, R5_method);
__ jump_from_interpreted(Rmethod);
}
//----------------------------------------------------------------------------------------------------
// Allocation
void TemplateTable::_new() {
transition(vtos, atos);
const Register Robj = R0_tos;
const Register Rcpool = R1_tmp;
const Register Rindex = R2_tmp;
const Register Rtags = R3_tmp;
const Register Rsize = R3_tmp;
Register Rklass = R4_tmp;
assert_different_registers(Rcpool, Rindex, Rtags, Rklass, Rtemp);
assert_different_registers(Rcpool, Rindex, Rklass, Rsize);
Label slow_case;
Label done;
Label initialize_header;
Label initialize_object; // including clearing the fields
const bool allow_shared_alloc =
Universe::heap()->supports_inline_contig_alloc();
// Literals
InlinedAddress Lheap_top_addr(allow_shared_alloc ? (address)Universe::heap()->top_addr() : NULL);
__ get_unsigned_2_byte_index_at_bcp(Rindex, 1);
__ get_cpool_and_tags(Rcpool, Rtags);
// Make sure the class we're about to instantiate has been resolved.
// This is done before loading InstanceKlass to be consistent with the order
// how Constant Pool is updated (see ConstantPool::klass_at_put)
const int tags_offset = Array<u1>::base_offset_in_bytes();
__ add(Rtemp, Rtags, Rindex);
__ ldrb(Rtemp, Address(Rtemp, tags_offset));
// use Rklass as a scratch
volatile_barrier(MacroAssembler::LoadLoad, Rklass);
// get InstanceKlass
__ cmp(Rtemp, JVM_CONSTANT_Class);
__ b(slow_case, ne);
__ load_resolved_klass_at_offset(Rcpool, Rindex, Rklass);
// make sure klass is initialized & doesn't have finalizer
// make sure klass is fully initialized
__ ldrb(Rtemp, Address(Rklass, InstanceKlass::init_state_offset()));
__ cmp(Rtemp, InstanceKlass::fully_initialized);
__ b(slow_case, ne);
// get instance_size in InstanceKlass (scaled to a count of bytes)
__ ldr_u32(Rsize, Address(Rklass, Klass::layout_helper_offset()));
// test to see if it has a finalizer or is malformed in some way
// Klass::_lh_instance_slow_path_bit is really a bit mask, not bit number
__ tbnz(Rsize, exact_log2(Klass::_lh_instance_slow_path_bit), slow_case);
// Allocate the instance:
// If TLAB is enabled:
// Try to allocate in the TLAB.
// If fails, go to the slow path.
// Else If inline contiguous allocations are enabled:
// Try to allocate in eden.
// If fails due to heap end, go to slow path.
//
// If TLAB is enabled OR inline contiguous is enabled:
// Initialize the allocation.
// Exit.
//
// Go to slow path.
if (UseTLAB) {
const Register Rtlab_top = R1_tmp;
const Register Rtlab_end = R2_tmp;
assert_different_registers(Robj, Rsize, Rklass, Rtlab_top, Rtlab_end);
__ tlab_allocate(Robj, Rtlab_top, Rtlab_end, Rsize, slow_case);
if (ZeroTLAB) {
// the fields have been already cleared
__ b(initialize_header);
} else {
// initialize both the header and fields
__ b(initialize_object);
}
} else {
// Allocation in the shared Eden, if allowed.
if (allow_shared_alloc) {
const Register Rheap_top_addr = R2_tmp;
const Register Rheap_top = R5_tmp;
const Register Rheap_end = Rtemp;
assert_different_registers(Robj, Rklass, Rsize, Rheap_top_addr, Rheap_top, Rheap_end, LR);
__ eden_allocate(Robj, Rheap_top, Rheap_top_addr, Rheap_end, Rsize, slow_case);
}
}
if (UseTLAB || allow_shared_alloc) {
const Register Rzero0 = R1_tmp;
const Register Rzero1 = R2_tmp;
const Register Rzero_end = R5_tmp;
const Register Rzero_cur = Rtemp;
assert_different_registers(Robj, Rsize, Rklass, Rzero0, Rzero1, Rzero_cur, Rzero_end);
// The object is initialized before the header. If the object size is
// zero, go directly to the header initialization.
__ bind(initialize_object);
__ subs(Rsize, Rsize, sizeof(oopDesc));
__ add(Rzero_cur, Robj, sizeof(oopDesc));
__ b(initialize_header, eq);
#ifdef ASSERT
// make sure Rsize is a multiple of 8
Label L;
__ tst(Rsize, 0x07);
__ b(L, eq);
__ stop("object size is not multiple of 8 - adjust this code");
__ bind(L);
#endif
__ mov(Rzero0, 0);
__ mov(Rzero1, 0);
__ add(Rzero_end, Rzero_cur, Rsize);
// initialize remaining object fields: Rsize was a multiple of 8
{ Label loop;
// loop is unrolled 2 times
__ bind(loop);
// #1
__ stmia(Rzero_cur, RegisterSet(Rzero0) | RegisterSet(Rzero1), writeback);
__ cmp(Rzero_cur, Rzero_end);
// #2
__ stmia(Rzero_cur, RegisterSet(Rzero0) | RegisterSet(Rzero1), writeback, ne);
__ cmp(Rzero_cur, Rzero_end, ne);
__ b(loop, ne);
}
// initialize object header only.
__ bind(initialize_header);
if (UseBiasedLocking) {
__ ldr(Rtemp, Address(Rklass, Klass::prototype_header_offset()));
} else {
__ mov_slow(Rtemp, (intptr_t)markWord::prototype().value());
}
// mark
__ str(Rtemp, Address(Robj, oopDesc::mark_offset_in_bytes()));
// klass
__ store_klass(Rklass, Robj); // blows Rklass:
Rklass = noreg;
// Note: Disable DTrace runtime check for now to eliminate overhead on each allocation
if (DTraceAllocProbes) {
// Trigger dtrace event for fastpath
Label Lcontinue;
__ ldrb_global(Rtemp, (address)&DTraceAllocProbes);
__ cbz(Rtemp, Lcontinue);
__ push(atos);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), Robj);
__ pop(atos);
__ bind(Lcontinue);
}
__ b(done);
} else {
// jump over literals
__ b(slow_case);
}
if (allow_shared_alloc) {
__ bind_literal(Lheap_top_addr);
}
// slow case
__ bind(slow_case);
__ get_constant_pool(Rcpool);
__ get_unsigned_2_byte_index_at_bcp(Rindex, 1);
__ call_VM(Robj, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), Rcpool, Rindex);
// continue
__ bind(done);
// StoreStore barrier required after complete initialization
// (headers + content zeroing), before the object may escape.
__ membar(MacroAssembler::StoreStore, R1_tmp);
}
void TemplateTable::newarray() {
transition(itos, atos);
__ ldrb(R1, at_bcp(1));
__ mov(R2, R0_tos);
call_VM(R0_tos, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), R1, R2);
// MacroAssembler::StoreStore useless (included in the runtime exit path)
}
void TemplateTable::anewarray() {
transition(itos, atos);
__ get_unsigned_2_byte_index_at_bcp(R2, 1);
__ get_constant_pool(R1);
__ mov(R3, R0_tos);
call_VM(R0_tos, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), R1, R2, R3);
// MacroAssembler::StoreStore useless (included in the runtime exit path)
}
void TemplateTable::arraylength() {
transition(atos, itos);
__ null_check(R0_tos, Rtemp, arrayOopDesc::length_offset_in_bytes());
__ ldr_s32(R0_tos, Address(R0_tos, arrayOopDesc::length_offset_in_bytes()));
}
void TemplateTable::checkcast() {
transition(atos, atos);
Label done, is_null, quicked, resolved, throw_exception;
const Register Robj = R0_tos;
const Register Rcpool = R2_tmp;
const Register Rtags = R3_tmp;
const Register Rindex = R4_tmp;
const Register Rsuper = R3_tmp;
const Register Rsub = R4_tmp;
const Register Rsubtype_check_tmp1 = R1_tmp;
const Register Rsubtype_check_tmp2 = LR_tmp;
__ cbz(Robj, is_null);
// Get cpool & tags index
__ get_cpool_and_tags(Rcpool, Rtags);
__ get_unsigned_2_byte_index_at_bcp(Rindex, 1);
// See if bytecode has already been quicked
__ add(Rtemp, Rtags, Rindex);
__ ldrb(Rtemp, Address(Rtemp, Array<u1>::base_offset_in_bytes()));
__ cmp(Rtemp, JVM_CONSTANT_Class);
volatile_barrier(MacroAssembler::LoadLoad, Rtemp, true);
__ b(quicked, eq);
__ push(atos);
call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
// vm_result_2 has metadata result
__ get_vm_result_2(Rsuper, Robj);
__ pop_ptr(Robj);
__ b(resolved);
__ bind(throw_exception);
// Come here on failure of subtype check
__ profile_typecheck_failed(R1_tmp);
__ mov(R2_ClassCastException_obj, Robj); // convention with generate_ClassCastException_handler()
__ b(Interpreter::_throw_ClassCastException_entry);
// Get superklass in Rsuper and subklass in Rsub
__ bind(quicked);
__ load_resolved_klass_at_offset(Rcpool, Rindex, Rsuper);
__ bind(resolved);
__ load_klass(Rsub, Robj);
// Generate subtype check. Blows both tmps and Rtemp.
assert_different_registers(Robj, Rsub, Rsuper, Rsubtype_check_tmp1, Rsubtype_check_tmp2, Rtemp);
__ gen_subtype_check(Rsub, Rsuper, throw_exception, Rsubtype_check_tmp1, Rsubtype_check_tmp2);
// Come here on success
// Collect counts on whether this check-cast sees NULLs a lot or not.
if (ProfileInterpreter) {
__ b(done);
__ bind(is_null);
__ profile_null_seen(R1_tmp);
} else {
__ bind(is_null); // same as 'done'
}
__ bind(done);
}
void TemplateTable::instanceof() {
// result = 0: obj == NULL or obj is not an instanceof the specified klass
// result = 1: obj != NULL and obj is an instanceof the specified klass
transition(atos, itos);
Label done, is_null, not_subtype, quicked, resolved;
const Register Robj = R0_tos;
const Register Rcpool = R2_tmp;
const Register Rtags = R3_tmp;
const Register Rindex = R4_tmp;
const Register Rsuper = R3_tmp;
const Register Rsub = R4_tmp;
const Register Rsubtype_check_tmp1 = R0_tmp;
const Register Rsubtype_check_tmp2 = R1_tmp;
__ cbz(Robj, is_null);
__ load_klass(Rsub, Robj);
// Get cpool & tags index
__ get_cpool_and_tags(Rcpool, Rtags);
__ get_unsigned_2_byte_index_at_bcp(Rindex, 1);
// See if bytecode has already been quicked
__ add(Rtemp, Rtags, Rindex);
__ ldrb(Rtemp, Address(Rtemp, Array<u1>::base_offset_in_bytes()));
__ cmp(Rtemp, JVM_CONSTANT_Class);
volatile_barrier(MacroAssembler::LoadLoad, Rtemp, true);
__ b(quicked, eq);
__ push(atos);
call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
// vm_result_2 has metadata result
__ get_vm_result_2(Rsuper, Robj);
__ pop_ptr(Robj);
__ b(resolved);
// Get superklass in Rsuper and subklass in Rsub
__ bind(quicked);
__ load_resolved_klass_at_offset(Rcpool, Rindex, Rsuper);
__ bind(resolved);
__ load_klass(Rsub, Robj);
// Generate subtype check. Blows both tmps and Rtemp.
__ gen_subtype_check(Rsub, Rsuper, not_subtype, Rsubtype_check_tmp1, Rsubtype_check_tmp2);
// Come here on success
__ mov(R0_tos, 1);
__ b(done);
__ bind(not_subtype);
// Come here on failure
__ profile_typecheck_failed(R1_tmp);
__ mov(R0_tos, 0);
// Collect counts on whether this test sees NULLs a lot or not.
if (ProfileInterpreter) {
__ b(done);
__ bind(is_null);
__ profile_null_seen(R1_tmp);
} else {
__ bind(is_null); // same as 'done'
}
__ bind(done);
}
//----------------------------------------------------------------------------------------------------
// Breakpoints
void TemplateTable::_breakpoint() {
// Note: We get here even if we are single stepping..
// jbug inists on setting breakpoints at every bytecode
// even if we are in single step mode.
transition(vtos, vtos);
// get the unpatched byte code
__ mov(R1, Rmethod);
__ mov(R2, Rbcp);
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::get_original_bytecode_at), R1, R2);
__ mov(Rtmp_save0, R0);
// post the breakpoint event
__ mov(R1, Rmethod);
__ mov(R2, Rbcp);
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), R1, R2);
// complete the execution of original bytecode
__ mov(R3_bytecode, Rtmp_save0);
__ dispatch_only_normal(vtos);
}
//----------------------------------------------------------------------------------------------------
// Exceptions
void TemplateTable::athrow() {
transition(atos, vtos);
__ mov(Rexception_obj, R0_tos);
__ null_check(Rexception_obj, Rtemp);
__ b(Interpreter::throw_exception_entry());
}
//----------------------------------------------------------------------------------------------------
// Synchronization
//
// Note: monitorenter & exit are symmetric routines; which is reflected
// in the assembly code structure as well
//
// Stack layout:
//
// [expressions ] <--- Rstack_top = expression stack top
// ..
// [expressions ]
// [monitor entry] <--- monitor block top = expression stack bot
// ..
// [monitor entry]
// [frame data ] <--- monitor block bot
// ...
// [saved FP ] <--- FP
void TemplateTable::monitorenter() {
transition(atos, vtos);
const Register Robj = R0_tos;
const Register Rentry = R1_tmp;
// check for NULL object
__ null_check(Robj, Rtemp);
__ resolve(IS_NOT_NULL, Robj);
const int entry_size = (frame::interpreter_frame_monitor_size() * wordSize);
assert (entry_size % StackAlignmentInBytes == 0, "keep stack alignment");
Label allocate_monitor, allocated;
// initialize entry pointer
__ mov(Rentry, 0); // points to free slot or NULL
// find a free slot in the monitor block (result in Rentry)
{ Label loop, exit;
const Register Rcur = R2_tmp;
const Register Rcur_obj = Rtemp;
const Register Rbottom = R3_tmp;
assert_different_registers(Robj, Rentry, Rcur, Rbottom, Rcur_obj);
__ ldr(Rcur, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize));
// points to current entry, starting with top-most entry
__ sub(Rbottom, FP, -frame::interpreter_frame_monitor_block_bottom_offset * wordSize);
// points to word before bottom of monitor block
__ cmp(Rcur, Rbottom); // check if there are no monitors
__ ldr(Rcur_obj, Address(Rcur, BasicObjectLock::obj_offset_in_bytes()), ne);
// prefetch monitor's object for the first iteration
__ b(allocate_monitor, eq); // there are no monitors, skip searching
__ bind(loop);
__ cmp(Rcur_obj, 0); // check if current entry is used
__ mov(Rentry, Rcur, eq); // if not used then remember entry
__ cmp(Rcur_obj, Robj); // check if current entry is for same object
__ b(exit, eq); // if same object then stop searching
__ add(Rcur, Rcur, entry_size); // otherwise advance to next entry
__ cmp(Rcur, Rbottom); // check if bottom reached
__ ldr(Rcur_obj, Address(Rcur, BasicObjectLock::obj_offset_in_bytes()), ne);
// prefetch monitor's object for the next iteration
__ b(loop, ne); // if not at bottom then check this entry
__ bind(exit);
}
__ cbnz(Rentry, allocated); // check if a slot has been found; if found, continue with that one
__ bind(allocate_monitor);
// allocate one if there's no free slot
{ Label loop;
assert_different_registers(Robj, Rentry, R2_tmp, Rtemp);
// 1. compute new pointers
__ ldr(Rentry, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize));
// old monitor block top / expression stack bottom
__ sub(Rstack_top, Rstack_top, entry_size); // move expression stack top
__ check_stack_top_on_expansion();
__ sub(Rentry, Rentry, entry_size); // move expression stack bottom
__ mov(R2_tmp, Rstack_top); // set start value for copy loop
__ str(Rentry, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize));
// set new monitor block top
// 2. move expression stack contents
__ cmp(R2_tmp, Rentry); // check if expression stack is empty
__ ldr(Rtemp, Address(R2_tmp, entry_size), ne); // load expression stack word from old location
__ b(allocated, eq);
__ bind(loop);
__ str(Rtemp, Address(R2_tmp, wordSize, post_indexed)); // store expression stack word at new location
// and advance to next word
__ cmp(R2_tmp, Rentry); // check if bottom reached
__ ldr(Rtemp, Address(R2, entry_size), ne); // load expression stack word from old location
__ b(loop, ne); // if not at bottom then copy next word
}
// call run-time routine
// Rentry: points to monitor entry
__ bind(allocated);
// Increment bcp to point to the next bytecode, so exception handling for async. exceptions work correctly.
// The object has already been poped from the stack, so the expression stack looks correct.
__ add(Rbcp, Rbcp, 1);
__ str(Robj, Address(Rentry, BasicObjectLock::obj_offset_in_bytes())); // store object
__ lock_object(Rentry);
// check to make sure this monitor doesn't cause stack overflow after locking
__ save_bcp(); // in case of exception
__ arm_stack_overflow_check(0, Rtemp);
// The bcp has already been incremented. Just need to dispatch to next instruction.
__ dispatch_next(vtos);
}
void TemplateTable::monitorexit() {
transition(atos, vtos);
const Register Robj = R0_tos;
const Register Rcur = R1_tmp;
const Register Rbottom = R2_tmp;
const Register Rcur_obj = Rtemp;
// check for NULL object
__ null_check(Robj, Rtemp);
__ resolve(IS_NOT_NULL, Robj);
const int entry_size = (frame::interpreter_frame_monitor_size() * wordSize);
Label found, throw_exception;
// find matching slot
{ Label loop;
assert_different_registers(Robj, Rcur, Rbottom, Rcur_obj);
__ ldr(Rcur, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize));
// points to current entry, starting with top-most entry
__ sub(Rbottom, FP, -frame::interpreter_frame_monitor_block_bottom_offset * wordSize);
// points to word before bottom of monitor block
__ cmp(Rcur, Rbottom); // check if bottom reached
__ ldr(Rcur_obj, Address(Rcur, BasicObjectLock::obj_offset_in_bytes()), ne);
// prefetch monitor's object for the first iteration
__ b(throw_exception, eq); // throw exception if there are now monitors
__ bind(loop);
// check if current entry is for same object
__ cmp(Rcur_obj, Robj);
__ b(found, eq); // if same object then stop searching
__ add(Rcur, Rcur, entry_size); // otherwise advance to next entry
__ cmp(Rcur, Rbottom); // check if bottom reached
__ ldr(Rcur_obj, Address(Rcur, BasicObjectLock::obj_offset_in_bytes()), ne);
__ b (loop, ne); // if not at bottom then check this entry
}
// error handling. Unlocking was not block-structured
__ bind(throw_exception);
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
__ should_not_reach_here();
// call run-time routine
// Rcur: points to monitor entry
__ bind(found);
__ push_ptr(Robj); // make sure object is on stack (contract with oopMaps)
__ unlock_object(Rcur);
__ pop_ptr(Robj); // discard object
}
//----------------------------------------------------------------------------------------------------
// Wide instructions
void TemplateTable::wide() {
transition(vtos, vtos);
__ ldrb(R3_bytecode, at_bcp(1));
InlinedAddress Ltable((address)Interpreter::_wentry_point);
__ ldr_literal(Rtemp, Ltable);
__ indirect_jump(Address::indexed_ptr(Rtemp, R3_bytecode), Rtemp);
__ nop(); // to avoid filling CPU pipeline with invalid instructions
__ nop();
__ bind_literal(Ltable);
}
//----------------------------------------------------------------------------------------------------
// Multi arrays
void TemplateTable::multianewarray() {
transition(vtos, atos);
__ ldrb(Rtmp_save0, at_bcp(3)); // get number of dimensions
// last dim is on top of stack; we want address of first one:
// first_addr = last_addr + ndims * stackElementSize - 1*wordsize
// the latter wordSize to point to the beginning of the array.
__ add(Rtemp, Rstack_top, AsmOperand(Rtmp_save0, lsl, Interpreter::logStackElementSize));
__ sub(R1, Rtemp, wordSize);
call_VM(R0, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), R1);
__ add(Rstack_top, Rstack_top, AsmOperand(Rtmp_save0, lsl, Interpreter::logStackElementSize));
// MacroAssembler::StoreStore useless (included in the runtime exit path)
}