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templateTable_x86.cpp
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templateTable_x86.cpp
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/*
* Copyright (c) 1997, 2021, 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.hpp"
#include "compiler/disassembler.hpp"
#include "gc/shared/tlab_globals.hpp"
#include "interpreter/interpreter.hpp"
#include "interpreter/interpreterRuntime.hpp"
#include "interpreter/interp_masm.hpp"
#include "interpreter/templateTable.hpp"
#include "memory/universe.hpp"
#include "oops/methodData.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/oop.inline.hpp"
#include "prims/jvmtiExport.hpp"
#include "prims/methodHandles.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/safepointMechanism.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubRoutines.hpp"
#include "runtime/synchronizer.hpp"
#include "utilities/macros.hpp"
#define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
// Global Register Names
static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
// 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);
}
#ifndef _LP64
static inline Address haddress(int n) {
return iaddress(n + 0);
}
#endif
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);
}
static inline Address iaddress(Register r) {
return Address(rlocals, r, Address::times_ptr);
}
static inline Address laddress(Register r) {
return Address(rlocals, r, Address::times_ptr, Interpreter::local_offset_in_bytes(1));
}
#ifndef _LP64
static inline Address haddress(Register r) {
return Address(rlocals, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0));
}
#endif
static inline Address faddress(Register r) {
return iaddress(r);
}
static inline Address daddress(Register r) {
return laddress(r);
}
static inline Address aaddress(Register r) {
return iaddress(r);
}
// expression stack
// (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store
// data beyond the rsp which is potentially unsafe in an MT environment;
// an interrupt may overwrite that data.)
static inline Address at_rsp () {
return Address(rsp, 0);
}
// At top of Java expression stack which may be different than esp(). It
// isn't for category 1 objects.
static inline Address at_tos () {
return Address(rsp, Interpreter::expr_offset_in_bytes(0));
}
static inline Address at_tos_p1() {
return Address(rsp, Interpreter::expr_offset_in_bytes(1));
}
static inline Address at_tos_p2() {
return Address(rsp, Interpreter::expr_offset_in_bytes(2));
}
// Condition conversion
static Assembler::Condition j_not(TemplateTable::Condition cc) {
switch (cc) {
case TemplateTable::equal : return Assembler::notEqual;
case TemplateTable::not_equal : return Assembler::equal;
case TemplateTable::less : return Assembler::greaterEqual;
case TemplateTable::less_equal : return Assembler::greater;
case TemplateTable::greater : return Assembler::lessEqual;
case TemplateTable::greater_equal: return Assembler::less;
}
ShouldNotReachHere();
return Assembler::zero;
}
// Miscelaneous helper routines
// Store an oop (or NULL) at the address described by obj.
// If val == noreg this means store a NULL
static void do_oop_store(InterpreterMacroAssembler* _masm,
Address dst,
Register val,
DecoratorSet decorators = 0) {
assert(val == noreg || val == rax, "parameter is just for looks");
__ store_heap_oop(dst, val, rdx, rbx, decorators);
}
static void do_oop_load(InterpreterMacroAssembler* _masm,
Address src,
Register dst,
DecoratorSet decorators = 0) {
__ load_heap_oop(dst, src, rdx, rbx, decorators);
}
Address TemplateTable::at_bcp(int offset) {
assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
return Address(rbcp, offset);
}
void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
int byte_no) {
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(temp_reg, bc_reg, temp_reg, byte_no, 1);
__ movl(bc_reg, bc);
__ cmpl(temp_reg, (int) 0);
__ jcc(Assembler::zero, L_patch_done); // don't patch
}
break;
default:
assert(byte_no == -1, "sanity");
// the pair bytecodes have already done the load.
if (load_bc_into_bc_reg) {
__ movl(bc_reg, bc);
}
}
if (JvmtiExport::can_post_breakpoint()) {
Label L_fast_patch;
// if a breakpoint is present we can't rewrite the stream directly
__ movzbl(temp_reg, at_bcp(0));
__ cmpl(temp_reg, Bytecodes::_breakpoint);
__ jcc(Assembler::notEqual, L_fast_patch);
__ get_method(temp_reg);
// Let breakpoint table handling rewrite to quicker bytecode
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rbcp, bc_reg);
#ifndef ASSERT
__ jmpb(L_patch_done);
#else
__ jmp(L_patch_done);
#endif
__ bind(L_fast_patch);
}
#ifdef ASSERT
Label L_okay;
__ load_unsigned_byte(temp_reg, at_bcp(0));
__ cmpl(temp_reg, (int) Bytecodes::java_code(bc));
__ jcc(Assembler::equal, L_okay);
__ cmpl(temp_reg, bc_reg);
__ jcc(Assembler::equal, L_okay);
__ stop("patching the wrong bytecode");
__ bind(L_okay);
#endif
// patch bytecode
__ movb(at_bcp(0), bc_reg);
__ 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);
__ xorl(rax, rax);
}
void TemplateTable::iconst(int value) {
transition(vtos, itos);
if (value == 0) {
__ xorl(rax, rax);
} else {
__ movl(rax, value);
}
}
void TemplateTable::lconst(int value) {
transition(vtos, ltos);
if (value == 0) {
__ xorl(rax, rax);
} else {
__ movl(rax, value);
}
#ifndef _LP64
assert(value >= 0, "check this code");
__ xorptr(rdx, rdx);
#endif
}
void TemplateTable::fconst(int value) {
transition(vtos, ftos);
if (UseSSE >= 1) {
static float one = 1.0f, two = 2.0f;
switch (value) {
case 0:
__ xorps(xmm0, xmm0);
break;
case 1:
__ movflt(xmm0, ExternalAddress((address) &one));
break;
case 2:
__ movflt(xmm0, ExternalAddress((address) &two));
break;
default:
ShouldNotReachHere();
break;
}
} else {
#ifdef _LP64
ShouldNotReachHere();
#else
if (value == 0) { __ fldz();
} else if (value == 1) { __ fld1();
} else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here
} else { ShouldNotReachHere();
}
#endif // _LP64
}
}
void TemplateTable::dconst(int value) {
transition(vtos, dtos);
if (UseSSE >= 2) {
static double one = 1.0;
switch (value) {
case 0:
__ xorpd(xmm0, xmm0);
break;
case 1:
__ movdbl(xmm0, ExternalAddress((address) &one));
break;
default:
ShouldNotReachHere();
break;
}
} else {
#ifdef _LP64
ShouldNotReachHere();
#else
if (value == 0) { __ fldz();
} else if (value == 1) { __ fld1();
} else { ShouldNotReachHere();
}
#endif
}
}
void TemplateTable::bipush() {
transition(vtos, itos);
__ load_signed_byte(rax, at_bcp(1));
}
void TemplateTable::sipush() {
transition(vtos, itos);
__ load_unsigned_short(rax, at_bcp(1));
__ bswapl(rax);
__ sarl(rax, 16);
}
void TemplateTable::ldc(bool wide) {
transition(vtos, vtos);
Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
Label call_ldc, notFloat, notClass, notInt, Done;
if (wide) {
__ get_unsigned_2_byte_index_at_bcp(rbx, 1);
} else {
__ load_unsigned_byte(rbx, at_bcp(1));
}
__ get_cpool_and_tags(rcx, rax);
const int base_offset = ConstantPool::header_size() * wordSize;
const int tags_offset = Array<u1>::base_offset_in_bytes();
// get type
__ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
// unresolved class - get the resolved class
__ cmpl(rdx, JVM_CONSTANT_UnresolvedClass);
__ jccb(Assembler::equal, call_ldc);
// unresolved class in error state - call into runtime to throw the error
// from the first resolution attempt
__ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError);
__ jccb(Assembler::equal, call_ldc);
// resolved class - need to call vm to get java mirror of the class
__ cmpl(rdx, JVM_CONSTANT_Class);
__ jcc(Assembler::notEqual, notClass);
__ bind(call_ldc);
__ movl(rarg, wide);
call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rarg);
__ push(atos);
__ jmp(Done);
__ bind(notClass);
__ cmpl(rdx, JVM_CONSTANT_Float);
__ jccb(Assembler::notEqual, notFloat);
// ftos
__ load_float(Address(rcx, rbx, Address::times_ptr, base_offset));
__ push(ftos);
__ jmp(Done);
__ bind(notFloat);
__ cmpl(rdx, JVM_CONSTANT_Integer);
__ jccb(Assembler::notEqual, notInt);
// itos
__ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset));
__ push(itos);
__ jmp(Done);
// assume the tag is for condy; if not, the VM runtime will tell us
__ bind(notInt);
condy_helper(Done);
__ bind(Done);
}
// Fast path for caching oop constants.
void TemplateTable::fast_aldc(bool wide) {
transition(vtos, atos);
Register result = rax;
Register tmp = rdx;
Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
int index_size = wide ? sizeof(u2) : sizeof(u1);
Label resolved;
// We are resolved if the resolved reference cache entry contains a
// non-null object (String, MethodType, etc.)
assert_different_registers(result, tmp);
__ get_cache_index_at_bcp(tmp, 1, index_size);
__ load_resolved_reference_at_index(result, tmp);
__ testptr(result, result);
__ jcc(Assembler::notZero, resolved);
address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
// first time invocation - must resolve first
__ movl(rarg, (int)bytecode());
__ call_VM(result, entry, rarg);
__ bind(resolved);
{ // Check for the null sentinel.
// If we just called the VM, it already did the mapping for us,
// but it's harmless to retry.
Label notNull;
ExternalAddress null_sentinel((address)Universe::the_null_sentinel_addr());
__ movptr(tmp, null_sentinel);
__ resolve_oop_handle(tmp);
__ cmpoop(tmp, result);
__ jccb(Assembler::notEqual, notNull);
__ xorptr(result, result); // NULL object reference
__ bind(notNull);
}
if (VerifyOops) {
__ verify_oop(result);
}
}
void TemplateTable::ldc2_w() {
transition(vtos, vtos);
Label notDouble, notLong, Done;
__ get_unsigned_2_byte_index_at_bcp(rbx, 1);
__ get_cpool_and_tags(rcx, rax);
const int base_offset = ConstantPool::header_size() * wordSize;
const int tags_offset = Array<u1>::base_offset_in_bytes();
// get type
__ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
__ cmpl(rdx, JVM_CONSTANT_Double);
__ jccb(Assembler::notEqual, notDouble);
// dtos
__ load_double(Address(rcx, rbx, Address::times_ptr, base_offset));
__ push(dtos);
__ jmp(Done);
__ bind(notDouble);
__ cmpl(rdx, JVM_CONSTANT_Long);
__ jccb(Assembler::notEqual, notLong);
// ltos
__ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize));
NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize)));
__ push(ltos);
__ jmp(Done);
__ bind(notLong);
condy_helper(Done);
__ bind(Done);
}
void TemplateTable::condy_helper(Label& Done) {
const Register obj = rax;
const Register off = rbx;
const Register flags = rcx;
const Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
__ movl(rarg, (int)bytecode());
call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc), rarg);
#ifndef _LP64
// borrow rdi from locals
__ get_thread(rdi);
__ get_vm_result_2(flags, rdi);
__ restore_locals();
#else
__ get_vm_result_2(flags, r15_thread);
#endif
// VMr = obj = base address to find primitive value to push
// VMr2 = flags = (tos, off) using format of CPCE::_flags
__ movl(off, flags);
__ andl(off, ConstantPoolCacheEntry::field_index_mask);
const Address field(obj, off, Address::times_1, 0*wordSize);
// What sort of thing are we loading?
__ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
__ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
switch (bytecode()) {
case Bytecodes::_ldc:
case Bytecodes::_ldc_w:
{
// tos in (itos, ftos, stos, btos, ctos, ztos)
Label notInt, notFloat, notShort, notByte, notChar, notBool;
__ cmpl(flags, itos);
__ jcc(Assembler::notEqual, notInt);
// itos
__ movl(rax, field);
__ push(itos);
__ jmp(Done);
__ bind(notInt);
__ cmpl(flags, ftos);
__ jcc(Assembler::notEqual, notFloat);
// ftos
__ load_float(field);
__ push(ftos);
__ jmp(Done);
__ bind(notFloat);
__ cmpl(flags, stos);
__ jcc(Assembler::notEqual, notShort);
// stos
__ load_signed_short(rax, field);
__ push(stos);
__ jmp(Done);
__ bind(notShort);
__ cmpl(flags, btos);
__ jcc(Assembler::notEqual, notByte);
// btos
__ load_signed_byte(rax, field);
__ push(btos);
__ jmp(Done);
__ bind(notByte);
__ cmpl(flags, ctos);
__ jcc(Assembler::notEqual, notChar);
// ctos
__ load_unsigned_short(rax, field);
__ push(ctos);
__ jmp(Done);
__ bind(notChar);
__ cmpl(flags, ztos);
__ jcc(Assembler::notEqual, notBool);
// ztos
__ load_signed_byte(rax, field);
__ push(ztos);
__ jmp(Done);
__ bind(notBool);
break;
}
case Bytecodes::_ldc2_w:
{
Label notLong, notDouble;
__ cmpl(flags, ltos);
__ jcc(Assembler::notEqual, notLong);
// ltos
// Loading high word first because movptr clobbers rax
NOT_LP64(__ movptr(rdx, field.plus_disp(4)));
__ movptr(rax, field);
__ push(ltos);
__ jmp(Done);
__ bind(notLong);
__ cmpl(flags, dtos);
__ jcc(Assembler::notEqual, notDouble);
// dtos
__ load_double(field);
__ push(dtos);
__ jmp(Done);
__ bind(notDouble);
break;
}
default:
ShouldNotReachHere();
}
__ stop("bad ldc/condy");
}
void TemplateTable::locals_index(Register reg, int offset) {
__ load_unsigned_byte(reg, at_bcp(offset));
__ negptr(reg);
}
void TemplateTable::iload() {
iload_internal();
}
void TemplateTable::nofast_iload() {
iload_internal(may_not_rewrite);
}
void TemplateTable::iload_internal(RewriteControl rc) {
transition(vtos, itos);
if (RewriteFrequentPairs && rc == may_rewrite) {
Label rewrite, done;
const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
LP64_ONLY(assert(rbx != bc, "register damaged"));
// get next byte
__ load_unsigned_byte(rbx,
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.
__ cmpl(rbx, Bytecodes::_iload);
__ jcc(Assembler::equal, done);
__ cmpl(rbx, Bytecodes::_fast_iload);
__ movl(bc, Bytecodes::_fast_iload2);
__ jccb(Assembler::equal, rewrite);
// if _caload, rewrite to fast_icaload
__ cmpl(rbx, Bytecodes::_caload);
__ movl(bc, Bytecodes::_fast_icaload);
__ jccb(Assembler::equal, rewrite);
// rewrite so iload doesn't check again.
__ movl(bc, Bytecodes::_fast_iload);
// rewrite
// bc: fast bytecode
__ bind(rewrite);
patch_bytecode(Bytecodes::_iload, bc, rbx, false);
__ bind(done);
}
// Get the local value into tos
locals_index(rbx);
__ movl(rax, iaddress(rbx));
}
void TemplateTable::fast_iload2() {
transition(vtos, itos);
locals_index(rbx);
__ movl(rax, iaddress(rbx));
__ push(itos);
locals_index(rbx, 3);
__ movl(rax, iaddress(rbx));
}
void TemplateTable::fast_iload() {
transition(vtos, itos);
locals_index(rbx);
__ movl(rax, iaddress(rbx));
}
void TemplateTable::lload() {
transition(vtos, ltos);
locals_index(rbx);
__ movptr(rax, laddress(rbx));
NOT_LP64(__ movl(rdx, haddress(rbx)));
}
void TemplateTable::fload() {
transition(vtos, ftos);
locals_index(rbx);
__ load_float(faddress(rbx));
}
void TemplateTable::dload() {
transition(vtos, dtos);
locals_index(rbx);
__ load_double(daddress(rbx));
}
void TemplateTable::aload() {
transition(vtos, atos);
locals_index(rbx);
__ movptr(rax, aaddress(rbx));
}
void TemplateTable::locals_index_wide(Register reg) {
__ load_unsigned_short(reg, at_bcp(2));
__ bswapl(reg);
__ shrl(reg, 16);
__ negptr(reg);
}
void TemplateTable::wide_iload() {
transition(vtos, itos);
locals_index_wide(rbx);
__ movl(rax, iaddress(rbx));
}
void TemplateTable::wide_lload() {
transition(vtos, ltos);
locals_index_wide(rbx);
__ movptr(rax, laddress(rbx));
NOT_LP64(__ movl(rdx, haddress(rbx)));
}
void TemplateTable::wide_fload() {
transition(vtos, ftos);
locals_index_wide(rbx);
__ load_float(faddress(rbx));
}
void TemplateTable::wide_dload() {
transition(vtos, dtos);
locals_index_wide(rbx);
__ load_double(daddress(rbx));
}
void TemplateTable::wide_aload() {
transition(vtos, atos);
locals_index_wide(rbx);
__ movptr(rax, aaddress(rbx));
}
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) {
// destroys rbx
// check array
__ null_check(array, arrayOopDesc::length_offset_in_bytes());
// sign extend index for use by indexed load
__ movl2ptr(index, index);
// check index
__ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes()));
if (index != rbx) {
// ??? convention: move aberrant index into rbx for exception message
assert(rbx != array, "different registers");
__ movl(rbx, index);
}
Label skip;
__ jccb(Assembler::below, skip);
// Pass array to create more detailed exceptions.
__ mov(NOT_LP64(rax) LP64_ONLY(c_rarg1), array);
__ jump(ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry));
__ bind(skip);
}
void TemplateTable::iaload() {
transition(itos, itos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
__ access_load_at(T_INT, IN_HEAP | IS_ARRAY, rax,
Address(rdx, rax, Address::times_4,
arrayOopDesc::base_offset_in_bytes(T_INT)),
noreg, noreg);
}
void TemplateTable::laload() {
transition(itos, ltos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
NOT_LP64(__ mov(rbx, rax));
// rbx,: index
__ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, noreg /* ltos */,
Address(rdx, rbx, Address::times_8,
arrayOopDesc::base_offset_in_bytes(T_LONG)),
noreg, noreg);
}
void TemplateTable::faload() {
transition(itos, ftos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
__ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, noreg /* ftos */,
Address(rdx, rax,
Address::times_4,
arrayOopDesc::base_offset_in_bytes(T_FLOAT)),
noreg, noreg);
}
void TemplateTable::daload() {
transition(itos, dtos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
__ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, noreg /* dtos */,
Address(rdx, rax,
Address::times_8,
arrayOopDesc::base_offset_in_bytes(T_DOUBLE)),
noreg, noreg);
}
void TemplateTable::aaload() {
transition(itos, atos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
do_oop_load(_masm,
Address(rdx, rax,
UseCompressedOops ? Address::times_4 : Address::times_ptr,
arrayOopDesc::base_offset_in_bytes(T_OBJECT)),
rax,
IS_ARRAY);
}
void TemplateTable::baload() {
transition(itos, itos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
__ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, rax,
Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE)),
noreg, noreg);
}
void TemplateTable::caload() {
transition(itos, itos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
__ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
noreg, noreg);
}
// iload followed by caload frequent pair
void TemplateTable::fast_icaload() {
transition(vtos, itos);
// load index out of locals
locals_index(rbx);
__ movl(rax, iaddress(rbx));
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
__ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
noreg, noreg);
}
void TemplateTable::saload() {
transition(itos, itos);
// rax: index
// rdx: array
index_check(rdx, rax); // kills rbx
__ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, rax,
Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT)),
noreg, noreg);
}
void TemplateTable::iload(int n) {
transition(vtos, itos);
__ movl(rax, iaddress(n));
}
void TemplateTable::lload(int n) {
transition(vtos, ltos);
__ movptr(rax, laddress(n));
NOT_LP64(__ movptr(rdx, haddress(n)));
}
void TemplateTable::fload(int n) {
transition(vtos, ftos);
__ load_float(faddress(n));
}
void TemplateTable::dload(int n) {
transition(vtos, dtos);
__ load_double(daddress(n));
}
void TemplateTable::aload(int n) {
transition(vtos, atos);
__ movptr(rax, 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 (RewriteFrequentPairs && rc == may_rewrite) {
Label rewrite, done;
const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
LP64_ONLY(assert(rbx != bc, "register damaged"));
// get next byte
__ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
// if _getfield then wait with rewrite
__ cmpl(rbx, Bytecodes::_getfield);
__ jcc(Assembler::equal, done);
// if _igetfield then rewrite to _fast_iaccess_0
assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
__ cmpl(rbx, Bytecodes::_fast_igetfield);
__ movl(bc, Bytecodes::_fast_iaccess_0);
__ jccb(Assembler::equal, rewrite);
// if _agetfield then rewrite to _fast_aaccess_0
assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
__ cmpl(rbx, Bytecodes::_fast_agetfield);
__ movl(bc, Bytecodes::_fast_aaccess_0);
__ jccb(Assembler::equal, rewrite);
// if _fgetfield then rewrite to _fast_faccess_0
assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
__ cmpl(rbx, Bytecodes::_fast_fgetfield);
__ movl(bc, Bytecodes::_fast_faccess_0);
__ jccb(Assembler::equal, rewrite);
// else rewrite to _fast_aload0
assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
__ movl(bc, Bytecodes::_fast_aload_0);
// rewrite
// bc: fast bytecode
__ bind(rewrite);
patch_bytecode(Bytecodes::_aload_0, bc, rbx, false);
__ bind(done);
}
// Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
aload(0);
}
void TemplateTable::istore() {
transition(itos, vtos);
locals_index(rbx);
__ movl(iaddress(rbx), rax);
}
void TemplateTable::lstore() {
transition(ltos, vtos);
locals_index(rbx);
__ movptr(laddress(rbx), rax);
NOT_LP64(__ movptr(haddress(rbx), rdx));
}
void TemplateTable::fstore() {
transition(ftos, vtos);
locals_index(rbx);
__ store_float(faddress(rbx));
}