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third-party-mirror/openjdk/jdk25u/HEAD/./src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
blob: 04e32e2b8be8c33c655459c97ef3718462a16622 [file]
/*
* Copyright (c) 2000, 2025, 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 "asm/macroAssembler.hpp"
#include "asm/macroAssembler.inline.hpp"
#include "c1/c1_CodeStubs.hpp"
#include "c1/c1_Compilation.hpp"
#include "c1/c1_LIRAssembler.hpp"
#include "c1/c1_MacroAssembler.hpp"
#include "c1/c1_Runtime1.hpp"
#include "c1/c1_ValueStack.hpp"
#include "ci/ciArrayKlass.hpp"
#include "ci/ciInstance.hpp"
#include "compiler/oopMap.hpp"
#include "gc/shared/collectedHeap.hpp"
#include "gc/shared/gc_globals.hpp"
#include "nativeInst_x86.hpp"
#include "oops/objArrayKlass.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/safepointMechanism.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubRoutines.hpp"
#include "utilities/powerOfTwo.hpp"
#include "vmreg_x86.inline.hpp"
// These masks are used to provide 128-bit aligned bitmasks to the XMM
// instructions, to allow sign-masking or sign-bit flipping. They allow
// fast versions of NegF/NegD and AbsF/AbsD.
// Note: 'double' and 'long long' have 32-bits alignment on x86.
static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
// Use the expression (adr)&(~0xF) to provide 128-bits aligned address
// of 128-bits operands for SSE instructions.
jlong *operand = (jlong*)(((intptr_t)adr) & ((intptr_t)(~0xF)));
// Store the value to a 128-bits operand.
operand[0] = lo;
operand[1] = hi;
return operand;
}
// Buffer for 128-bits masks used by SSE instructions.
static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment)
// Static initialization during VM startup.
static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF));
static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF));
static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], (jlong)UCONST64(0x8000000080000000), (jlong)UCONST64(0x8000000080000000));
static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], (jlong)UCONST64(0x8000000000000000), (jlong)UCONST64(0x8000000000000000));
NEEDS_CLEANUP // remove this definitions ?
const Register SYNC_header = rax; // synchronization header
const Register SHIFT_count = rcx; // where count for shift operations must be
#define __ _masm->
static void select_different_registers(Register preserve,
Register extra,
Register &tmp1,
Register &tmp2) {
if (tmp1 == preserve) {
assert_different_registers(tmp1, tmp2, extra);
tmp1 = extra;
} else if (tmp2 == preserve) {
assert_different_registers(tmp1, tmp2, extra);
tmp2 = extra;
}
assert_different_registers(preserve, tmp1, tmp2);
}
static void select_different_registers(Register preserve,
Register extra,
Register &tmp1,
Register &tmp2,
Register &tmp3) {
if (tmp1 == preserve) {
assert_different_registers(tmp1, tmp2, tmp3, extra);
tmp1 = extra;
} else if (tmp2 == preserve) {
assert_different_registers(tmp1, tmp2, tmp3, extra);
tmp2 = extra;
} else if (tmp3 == preserve) {
assert_different_registers(tmp1, tmp2, tmp3, extra);
tmp3 = extra;
}
assert_different_registers(preserve, tmp1, tmp2, tmp3);
}
bool LIR_Assembler::is_small_constant(LIR_Opr opr) {
if (opr->is_constant()) {
LIR_Const* constant = opr->as_constant_ptr();
switch (constant->type()) {
case T_INT: {
return true;
}
default:
return false;
}
}
return false;
}
LIR_Opr LIR_Assembler::receiverOpr() {
return FrameMap::receiver_opr;
}
LIR_Opr LIR_Assembler::osrBufferPointer() {
return FrameMap::as_pointer_opr(receiverOpr()->as_register());
}
//--------------fpu register translations-----------------------
address LIR_Assembler::float_constant(float f) {
address const_addr = __ float_constant(f);
if (const_addr == nullptr) {
bailout("const section overflow");
return __ code()->consts()->start();
} else {
return const_addr;
}
}
address LIR_Assembler::double_constant(double d) {
address const_addr = __ double_constant(d);
if (const_addr == nullptr) {
bailout("const section overflow");
return __ code()->consts()->start();
} else {
return const_addr;
}
}
void LIR_Assembler::breakpoint() {
__ int3();
}
void LIR_Assembler::push(LIR_Opr opr) {
if (opr->is_single_cpu()) {
__ push_reg(opr->as_register());
} else if (opr->is_double_cpu()) {
__ push_reg(opr->as_register_lo());
} else if (opr->is_stack()) {
__ push_addr(frame_map()->address_for_slot(opr->single_stack_ix()));
} else if (opr->is_constant()) {
LIR_Const* const_opr = opr->as_constant_ptr();
if (const_opr->type() == T_OBJECT) {
__ push_oop(const_opr->as_jobject(), rscratch1);
} else if (const_opr->type() == T_INT) {
__ push_jint(const_opr->as_jint());
} else {
ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::pop(LIR_Opr opr) {
if (opr->is_single_cpu()) {
__ pop_reg(opr->as_register());
} else {
ShouldNotReachHere();
}
}
bool LIR_Assembler::is_literal_address(LIR_Address* addr) {
return addr->base()->is_illegal() && addr->index()->is_illegal();
}
//-------------------------------------------
Address LIR_Assembler::as_Address(LIR_Address* addr) {
return as_Address(addr, rscratch1);
}
Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
if (addr->base()->is_illegal()) {
assert(addr->index()->is_illegal(), "must be illegal too");
AddressLiteral laddr((address)addr->disp(), relocInfo::none);
if (! __ reachable(laddr)) {
__ movptr(tmp, laddr.addr());
Address res(tmp, 0);
return res;
} else {
return __ as_Address(laddr);
}
}
Register base = addr->base()->as_pointer_register();
if (addr->index()->is_illegal()) {
return Address( base, addr->disp());
} else if (addr->index()->is_cpu_register()) {
Register index = addr->index()->as_pointer_register();
return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp());
} else if (addr->index()->is_constant()) {
intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp();
assert(Assembler::is_simm32(addr_offset), "must be");
return Address(base, addr_offset);
} else {
Unimplemented();
return Address();
}
}
Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
Address base = as_Address(addr);
return Address(base._base, base._index, base._scale, base._disp + BytesPerWord);
}
Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
return as_Address(addr);
}
void LIR_Assembler::osr_entry() {
offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
BlockBegin* osr_entry = compilation()->hir()->osr_entry();
ValueStack* entry_state = osr_entry->state();
int number_of_locks = entry_state->locks_size();
// we jump here if osr happens with the interpreter
// state set up to continue at the beginning of the
// loop that triggered osr - in particular, we have
// the following registers setup:
//
// rcx: osr buffer
//
// build frame
ciMethod* m = compilation()->method();
__ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes());
// OSR buffer is
//
// locals[nlocals-1..0]
// monitors[0..number_of_locks]
//
// locals is a direct copy of the interpreter frame so in the osr buffer
// so first slot in the local array is the last local from the interpreter
// and last slot is local[0] (receiver) from the interpreter
//
// Similarly with locks. The first lock slot in the osr buffer is the nth lock
// from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
// in the interpreter frame (the method lock if a sync method)
// Initialize monitors in the compiled activation.
// rcx: pointer to osr buffer
//
// All other registers are dead at this point and the locals will be
// copied into place by code emitted in the IR.
Register OSR_buf = osrBufferPointer()->as_pointer_register();
{ assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
int monitor_offset = BytesPerWord * method()->max_locals() +
(BasicObjectLock::size() * BytesPerWord) * (number_of_locks - 1);
// SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
// the OSR buffer using 2 word entries: first the lock and then
// the oop.
for (int i = 0; i < number_of_locks; i++) {
int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
#ifdef ASSERT
// verify the interpreter's monitor has a non-null object
{
Label L;
__ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), NULL_WORD);
__ jcc(Assembler::notZero, L);
__ stop("locked object is null");
__ bind(L);
}
#endif
__ movptr(rbx, Address(OSR_buf, slot_offset + 0));
__ movptr(frame_map()->address_for_monitor_lock(i), rbx);
__ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord));
__ movptr(frame_map()->address_for_monitor_object(i), rbx);
}
}
}
// inline cache check; done before the frame is built.
int LIR_Assembler::check_icache() {
return __ ic_check(CodeEntryAlignment);
}
void LIR_Assembler::clinit_barrier(ciMethod* method) {
assert(VM_Version::supports_fast_class_init_checks(), "sanity");
assert(!method->holder()->is_not_initialized(), "initialization should have been started");
Label L_skip_barrier;
Register klass = rscratch1;
__ mov_metadata(klass, method->holder()->constant_encoding());
__ clinit_barrier(klass, &L_skip_barrier /*L_fast_path*/);
__ jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub()));
__ bind(L_skip_barrier);
}
void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) {
jobject o = nullptr;
PatchingStub* patch = new PatchingStub(_masm, patching_id(info));
__ movoop(reg, o);
patching_epilog(patch, lir_patch_normal, reg, info);
}
void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) {
Metadata* o = nullptr;
PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id);
__ mov_metadata(reg, o);
patching_epilog(patch, lir_patch_normal, reg, info);
}
// This specifies the rsp decrement needed to build the frame
int LIR_Assembler::initial_frame_size_in_bytes() const {
// if rounding, must let FrameMap know!
// The frame_map records size in slots (32bit word)
// subtract two words to account for return address and link
return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size;
}
int LIR_Assembler::emit_exception_handler() {
// generate code for exception handler
address handler_base = __ start_a_stub(exception_handler_size());
if (handler_base == nullptr) {
// not enough space left for the handler
bailout("exception handler overflow");
return -1;
}
int offset = code_offset();
// the exception oop and pc are in rax, and rdx
// no other registers need to be preserved, so invalidate them
__ invalidate_registers(false, true, true, false, true, true);
// check that there is really an exception
__ verify_not_null_oop(rax);
// search an exception handler (rax: exception oop, rdx: throwing pc)
__ call(RuntimeAddress(Runtime1::entry_for(C1StubId::handle_exception_from_callee_id)));
__ should_not_reach_here();
guarantee(code_offset() - offset <= exception_handler_size(), "overflow");
__ end_a_stub();
return offset;
}
// Emit the code to remove the frame from the stack in the exception
// unwind path.
int LIR_Assembler::emit_unwind_handler() {
#ifndef PRODUCT
if (CommentedAssembly) {
_masm->block_comment("Unwind handler");
}
#endif
int offset = code_offset();
// Fetch the exception from TLS and clear out exception related thread state
__ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset()));
__ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), NULL_WORD);
__ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), NULL_WORD);
__ bind(_unwind_handler_entry);
__ verify_not_null_oop(rax);
if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
__ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved)
}
// Perform needed unlocking
MonitorExitStub* stub = nullptr;
if (method()->is_synchronized()) {
monitor_address(0, FrameMap::rax_opr);
stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
if (LockingMode == LM_MONITOR) {
__ jmp(*stub->entry());
} else {
__ unlock_object(rdi, rsi, rax, *stub->entry());
}
__ bind(*stub->continuation());
}
if (compilation()->env()->dtrace_method_probes()) {
__ mov(rdi, r15_thread);
__ mov_metadata(rsi, method()->constant_encoding());
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
}
if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
__ mov(rax, rbx); // Restore the exception
}
// remove the activation and dispatch to the unwind handler
__ remove_frame(initial_frame_size_in_bytes());
__ jump(RuntimeAddress(Runtime1::entry_for(C1StubId::unwind_exception_id)));
// Emit the slow path assembly
if (stub != nullptr) {
stub->emit_code(this);
}
return offset;
}
int LIR_Assembler::emit_deopt_handler() {
// generate code for exception handler
address handler_base = __ start_a_stub(deopt_handler_size());
if (handler_base == nullptr) {
// not enough space left for the handler
bailout("deopt handler overflow");
return -1;
}
int offset = code_offset();
InternalAddress here(__ pc());
__ pushptr(here.addr(), rscratch1);
__ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
guarantee(code_offset() - offset <= deopt_handler_size(), "overflow");
__ end_a_stub();
return offset;
}
void LIR_Assembler::return_op(LIR_Opr result, C1SafepointPollStub* code_stub) {
assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,");
if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) {
assert(result->fpu() == 0, "result must already be on TOS");
}
// Pop the stack before the safepoint code
__ remove_frame(initial_frame_size_in_bytes());
if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) {
__ reserved_stack_check();
}
// Note: we do not need to round double result; float result has the right precision
// the poll sets the condition code, but no data registers
code_stub->set_safepoint_offset(__ offset());
__ relocate(relocInfo::poll_return_type);
__ safepoint_poll(*code_stub->entry(), true /* at_return */, true /* in_nmethod */);
__ ret(0);
}
int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
guarantee(info != nullptr, "Shouldn't be null");
int offset = __ offset();
const Register poll_addr = rscratch1;
__ movptr(poll_addr, Address(r15_thread, JavaThread::polling_page_offset()));
add_debug_info_for_branch(info);
__ relocate(relocInfo::poll_type);
address pre_pc = __ pc();
__ testl(rax, Address(poll_addr, 0));
address post_pc = __ pc();
guarantee(pointer_delta(post_pc, pre_pc, 1) == 3, "must be exact length");
return offset;
}
void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
if (from_reg != to_reg) __ mov(to_reg, from_reg);
}
void LIR_Assembler::swap_reg(Register a, Register b) {
__ xchgptr(a, b);
}
void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
assert(src->is_constant(), "should not call otherwise");
assert(dest->is_register(), "should not call otherwise");
LIR_Const* c = src->as_constant_ptr();
switch (c->type()) {
case T_INT: {
assert(patch_code == lir_patch_none, "no patching handled here");
__ movl(dest->as_register(), c->as_jint());
break;
}
case T_ADDRESS: {
assert(patch_code == lir_patch_none, "no patching handled here");
__ movptr(dest->as_register(), c->as_jint());
break;
}
case T_LONG: {
assert(patch_code == lir_patch_none, "no patching handled here");
__ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
break;
}
case T_OBJECT: {
if (patch_code != lir_patch_none) {
jobject2reg_with_patching(dest->as_register(), info);
} else {
__ movoop(dest->as_register(), c->as_jobject());
}
break;
}
case T_METADATA: {
if (patch_code != lir_patch_none) {
klass2reg_with_patching(dest->as_register(), info);
} else {
__ mov_metadata(dest->as_register(), c->as_metadata());
}
break;
}
case T_FLOAT: {
if (dest->is_single_xmm()) {
if (UseAVX <= 2 && c->is_zero_float()) {
__ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg());
} else {
__ movflt(dest->as_xmm_float_reg(),
InternalAddress(float_constant(c->as_jfloat())));
}
} else {
ShouldNotReachHere();
}
break;
}
case T_DOUBLE: {
if (dest->is_double_xmm()) {
if (UseAVX <= 2 && c->is_zero_double()) {
__ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg());
} else {
__ movdbl(dest->as_xmm_double_reg(),
InternalAddress(double_constant(c->as_jdouble())));
}
} else {
ShouldNotReachHere();
}
break;
}
default:
ShouldNotReachHere();
}
}
void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
assert(src->is_constant(), "should not call otherwise");
assert(dest->is_stack(), "should not call otherwise");
LIR_Const* c = src->as_constant_ptr();
switch (c->type()) {
case T_INT: // fall through
case T_FLOAT:
__ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
break;
case T_ADDRESS:
__ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
break;
case T_OBJECT:
__ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject(), rscratch1);
break;
case T_LONG: // fall through
case T_DOUBLE:
__ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
lo_word_offset_in_bytes),
(intptr_t)c->as_jlong_bits(),
rscratch1);
break;
default:
ShouldNotReachHere();
}
}
void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
assert(src->is_constant(), "should not call otherwise");
assert(dest->is_address(), "should not call otherwise");
LIR_Const* c = src->as_constant_ptr();
LIR_Address* addr = dest->as_address_ptr();
int null_check_here = code_offset();
switch (type) {
case T_INT: // fall through
case T_FLOAT:
__ movl(as_Address(addr), c->as_jint_bits());
break;
case T_ADDRESS:
__ movptr(as_Address(addr), c->as_jint_bits());
break;
case T_OBJECT: // fall through
case T_ARRAY:
if (c->as_jobject() == nullptr) {
if (UseCompressedOops && !wide) {
__ movl(as_Address(addr), NULL_WORD);
} else {
__ xorptr(rscratch1, rscratch1);
null_check_here = code_offset();
__ movptr(as_Address(addr), rscratch1);
}
} else {
if (is_literal_address(addr)) {
ShouldNotReachHere();
__ movoop(as_Address(addr, noreg), c->as_jobject(), rscratch1);
} else {
__ movoop(rscratch1, c->as_jobject());
if (UseCompressedOops && !wide) {
__ encode_heap_oop(rscratch1);
null_check_here = code_offset();
__ movl(as_Address_lo(addr), rscratch1);
} else {
null_check_here = code_offset();
__ movptr(as_Address_lo(addr), rscratch1);
}
}
}
break;
case T_LONG: // fall through
case T_DOUBLE:
if (is_literal_address(addr)) {
ShouldNotReachHere();
__ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits());
} else {
__ movptr(r10, (intptr_t)c->as_jlong_bits());
null_check_here = code_offset();
__ movptr(as_Address_lo(addr), r10);
}
break;
case T_BOOLEAN: // fall through
case T_BYTE:
__ movb(as_Address(addr), c->as_jint() & 0xFF);
break;
case T_CHAR: // fall through
case T_SHORT:
__ movw(as_Address(addr), c->as_jint() & 0xFFFF);
break;
default:
ShouldNotReachHere();
};
if (info != nullptr) {
add_debug_info_for_null_check(null_check_here, info);
}
}
void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
assert(src->is_register(), "should not call otherwise");
assert(dest->is_register(), "should not call otherwise");
// move between cpu-registers
if (dest->is_single_cpu()) {
if (src->type() == T_LONG) {
// Can do LONG -> OBJECT
move_regs(src->as_register_lo(), dest->as_register());
return;
}
assert(src->is_single_cpu(), "must match");
if (src->type() == T_OBJECT) {
__ verify_oop(src->as_register());
}
move_regs(src->as_register(), dest->as_register());
} else if (dest->is_double_cpu()) {
if (is_reference_type(src->type())) {
// Surprising to me but we can see move of a long to t_object
__ verify_oop(src->as_register());
move_regs(src->as_register(), dest->as_register_lo());
return;
}
assert(src->is_double_cpu(), "must match");
Register f_lo = src->as_register_lo();
Register f_hi = src->as_register_hi();
Register t_lo = dest->as_register_lo();
Register t_hi = dest->as_register_hi();
assert(f_hi == f_lo, "must be same");
assert(t_hi == t_lo, "must be same");
move_regs(f_lo, t_lo);
// move between xmm-registers
} else if (dest->is_single_xmm()) {
assert(src->is_single_xmm(), "must match");
__ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg());
} else if (dest->is_double_xmm()) {
assert(src->is_double_xmm(), "must match");
__ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg());
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
assert(src->is_register(), "should not call otherwise");
assert(dest->is_stack(), "should not call otherwise");
if (src->is_single_cpu()) {
Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
if (is_reference_type(type)) {
__ verify_oop(src->as_register());
__ movptr (dst, src->as_register());
} else if (type == T_METADATA || type == T_ADDRESS) {
__ movptr (dst, src->as_register());
} else {
__ movl (dst, src->as_register());
}
} else if (src->is_double_cpu()) {
Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes);
Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes);
__ movptr (dstLO, src->as_register_lo());
} else if (src->is_single_xmm()) {
Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
__ movflt(dst_addr, src->as_xmm_float_reg());
} else if (src->is_double_xmm()) {
Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
__ movdbl(dst_addr, src->as_xmm_double_reg());
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide) {
LIR_Address* to_addr = dest->as_address_ptr();
PatchingStub* patch = nullptr;
Register compressed_src = rscratch1;
if (is_reference_type(type)) {
__ verify_oop(src->as_register());
if (UseCompressedOops && !wide) {
__ movptr(compressed_src, src->as_register());
__ encode_heap_oop(compressed_src);
if (patch_code != lir_patch_none) {
info->oop_map()->set_narrowoop(compressed_src->as_VMReg());
}
}
}
if (patch_code != lir_patch_none) {
patch = new PatchingStub(_masm, PatchingStub::access_field_id);
Address toa = as_Address(to_addr);
assert(toa.disp() != 0, "must have");
}
int null_check_here = code_offset();
switch (type) {
case T_FLOAT: {
assert(src->is_single_xmm(), "not a float");
__ movflt(as_Address(to_addr), src->as_xmm_float_reg());
break;
}
case T_DOUBLE: {
assert(src->is_double_xmm(), "not a double");
__ movdbl(as_Address(to_addr), src->as_xmm_double_reg());
break;
}
case T_ARRAY: // fall through
case T_OBJECT: // fall through
if (UseCompressedOops && !wide) {
__ movl(as_Address(to_addr), compressed_src);
} else {
__ movptr(as_Address(to_addr), src->as_register());
}
break;
case T_ADDRESS:
__ movptr(as_Address(to_addr), src->as_register());
break;
case T_INT:
__ movl(as_Address(to_addr), src->as_register());
break;
case T_LONG: {
Register from_lo = src->as_register_lo();
Register from_hi = src->as_register_hi();
__ movptr(as_Address_lo(to_addr), from_lo);
break;
}
case T_BYTE: // fall through
case T_BOOLEAN: {
Register src_reg = src->as_register();
Address dst_addr = as_Address(to_addr);
assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6");
__ movb(dst_addr, src_reg);
break;
}
case T_CHAR: // fall through
case T_SHORT:
__ movw(as_Address(to_addr), src->as_register());
break;
default:
ShouldNotReachHere();
}
if (info != nullptr) {
add_debug_info_for_null_check(null_check_here, info);
}
if (patch_code != lir_patch_none) {
patching_epilog(patch, patch_code, to_addr->base()->as_register(), info);
}
}
void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
assert(src->is_stack(), "should not call otherwise");
assert(dest->is_register(), "should not call otherwise");
if (dest->is_single_cpu()) {
if (is_reference_type(type)) {
__ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
__ verify_oop(dest->as_register());
} else if (type == T_METADATA || type == T_ADDRESS) {
__ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
} else {
__ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
}
} else if (dest->is_double_cpu()) {
Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes);
Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes);
__ movptr(dest->as_register_lo(), src_addr_LO);
} else if (dest->is_single_xmm()) {
Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
__ movflt(dest->as_xmm_float_reg(), src_addr);
} else if (dest->is_double_xmm()) {
Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
__ movdbl(dest->as_xmm_double_reg(), src_addr);
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
if (src->is_single_stack()) {
if (is_reference_type(type)) {
__ pushptr(frame_map()->address_for_slot(src ->single_stack_ix()));
__ popptr (frame_map()->address_for_slot(dest->single_stack_ix()));
} else {
//no pushl on 64bits
__ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix()));
__ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1);
}
} else if (src->is_double_stack()) {
__ pushptr(frame_map()->address_for_slot(src ->double_stack_ix()));
__ popptr (frame_map()->address_for_slot(dest->double_stack_ix()));
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide) {
assert(src->is_address(), "should not call otherwise");
assert(dest->is_register(), "should not call otherwise");
LIR_Address* addr = src->as_address_ptr();
Address from_addr = as_Address(addr);
if (addr->base()->type() == T_OBJECT) {
__ verify_oop(addr->base()->as_pointer_register());
}
switch (type) {
case T_BOOLEAN: // fall through
case T_BYTE: // fall through
case T_CHAR: // fall through
case T_SHORT:
if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) {
// on pre P6 processors we may get partial register stalls
// so blow away the value of to_rinfo before loading a
// partial word into it. Do it here so that it precedes
// the potential patch point below.
__ xorptr(dest->as_register(), dest->as_register());
}
break;
default:
break;
}
PatchingStub* patch = nullptr;
if (patch_code != lir_patch_none) {
patch = new PatchingStub(_masm, PatchingStub::access_field_id);
assert(from_addr.disp() != 0, "must have");
}
if (info != nullptr) {
add_debug_info_for_null_check_here(info);
}
switch (type) {
case T_FLOAT: {
if (dest->is_single_xmm()) {
__ movflt(dest->as_xmm_float_reg(), from_addr);
} else {
ShouldNotReachHere();
}
break;
}
case T_DOUBLE: {
if (dest->is_double_xmm()) {
__ movdbl(dest->as_xmm_double_reg(), from_addr);
} else {
ShouldNotReachHere();
}
break;
}
case T_OBJECT: // fall through
case T_ARRAY: // fall through
if (UseCompressedOops && !wide) {
__ movl(dest->as_register(), from_addr);
} else {
__ movptr(dest->as_register(), from_addr);
}
break;
case T_ADDRESS:
__ movptr(dest->as_register(), from_addr);
break;
case T_INT:
__ movl(dest->as_register(), from_addr);
break;
case T_LONG: {
Register to_lo = dest->as_register_lo();
Register to_hi = dest->as_register_hi();
__ movptr(to_lo, as_Address_lo(addr));
break;
}
case T_BOOLEAN: // fall through
case T_BYTE: {
Register dest_reg = dest->as_register();
assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
__ movsbl(dest_reg, from_addr);
} else {
__ movb(dest_reg, from_addr);
__ shll(dest_reg, 24);
__ sarl(dest_reg, 24);
}
break;
}
case T_CHAR: {
Register dest_reg = dest->as_register();
assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
__ movzwl(dest_reg, from_addr);
} else {
__ movw(dest_reg, from_addr);
}
break;
}
case T_SHORT: {
Register dest_reg = dest->as_register();
if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
__ movswl(dest_reg, from_addr);
} else {
__ movw(dest_reg, from_addr);
__ shll(dest_reg, 16);
__ sarl(dest_reg, 16);
}
break;
}
default:
ShouldNotReachHere();
}
if (patch != nullptr) {
patching_epilog(patch, patch_code, addr->base()->as_register(), info);
}
if (is_reference_type(type)) {
if (UseCompressedOops && !wide) {
__ decode_heap_oop(dest->as_register());
}
__ verify_oop(dest->as_register());
}
}
NEEDS_CLEANUP; // This could be static?
Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const {
int elem_size = type2aelembytes(type);
switch (elem_size) {
case 1: return Address::times_1;
case 2: return Address::times_2;
case 4: return Address::times_4;
case 8: return Address::times_8;
}
ShouldNotReachHere();
return Address::no_scale;
}
void LIR_Assembler::emit_op3(LIR_Op3* op) {
switch (op->code()) {
case lir_idiv:
case lir_irem:
arithmetic_idiv(op->code(),
op->in_opr1(),
op->in_opr2(),
op->in_opr3(),
op->result_opr(),
op->info());
break;
case lir_fmad:
__ fmad(op->result_opr()->as_xmm_double_reg(),
op->in_opr1()->as_xmm_double_reg(),
op->in_opr2()->as_xmm_double_reg(),
op->in_opr3()->as_xmm_double_reg());
break;
case lir_fmaf:
__ fmaf(op->result_opr()->as_xmm_float_reg(),
op->in_opr1()->as_xmm_float_reg(),
op->in_opr2()->as_xmm_float_reg(),
op->in_opr3()->as_xmm_float_reg());
break;
default: ShouldNotReachHere(); break;
}
}
void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
#ifdef ASSERT
assert(op->block() == nullptr || op->block()->label() == op->label(), "wrong label");
if (op->block() != nullptr) _branch_target_blocks.append(op->block());
if (op->ublock() != nullptr) _branch_target_blocks.append(op->ublock());
#endif
if (op->cond() == lir_cond_always) {
if (op->info() != nullptr) add_debug_info_for_branch(op->info());
__ jmp (*(op->label()));
} else {
Assembler::Condition acond = Assembler::zero;
if (op->code() == lir_cond_float_branch) {
assert(op->ublock() != nullptr, "must have unordered successor");
__ jcc(Assembler::parity, *(op->ublock()->label()));
switch(op->cond()) {
case lir_cond_equal: acond = Assembler::equal; break;
case lir_cond_notEqual: acond = Assembler::notEqual; break;
case lir_cond_less: acond = Assembler::below; break;
case lir_cond_lessEqual: acond = Assembler::belowEqual; break;
case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break;
case lir_cond_greater: acond = Assembler::above; break;
default: ShouldNotReachHere();
}
} else {
switch (op->cond()) {
case lir_cond_equal: acond = Assembler::equal; break;
case lir_cond_notEqual: acond = Assembler::notEqual; break;
case lir_cond_less: acond = Assembler::less; break;
case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
case lir_cond_greater: acond = Assembler::greater; break;
case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
default: ShouldNotReachHere();
}
}
__ jcc(acond,*(op->label()));
}
}
void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
LIR_Opr src = op->in_opr();
LIR_Opr dest = op->result_opr();
switch (op->bytecode()) {
case Bytecodes::_i2l:
__ movl2ptr(dest->as_register_lo(), src->as_register());
break;
case Bytecodes::_l2i:
__ movl(dest->as_register(), src->as_register_lo());
break;
case Bytecodes::_i2b:
move_regs(src->as_register(), dest->as_register());
__ sign_extend_byte(dest->as_register());
break;
case Bytecodes::_i2c:
move_regs(src->as_register(), dest->as_register());
__ andl(dest->as_register(), 0xFFFF);
break;
case Bytecodes::_i2s:
move_regs(src->as_register(), dest->as_register());
__ sign_extend_short(dest->as_register());
break;
case Bytecodes::_f2d:
__ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg());
break;
case Bytecodes::_d2f:
__ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg());
break;
case Bytecodes::_i2f:
__ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register());
break;
case Bytecodes::_i2d:
__ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register());
break;
case Bytecodes::_l2f:
__ cvtsi2ssq(dest->as_xmm_float_reg(), src->as_register_lo());
break;
case Bytecodes::_l2d:
__ cvtsi2sdq(dest->as_xmm_double_reg(), src->as_register_lo());
break;
case Bytecodes::_f2i:
__ convert_f2i(dest->as_register(), src->as_xmm_float_reg());
break;
case Bytecodes::_d2i:
__ convert_d2i(dest->as_register(), src->as_xmm_double_reg());
break;
case Bytecodes::_f2l:
__ convert_f2l(dest->as_register_lo(), src->as_xmm_float_reg());
break;
case Bytecodes::_d2l:
__ convert_d2l(dest->as_register_lo(), src->as_xmm_double_reg());
break;
default: ShouldNotReachHere();
}
}
void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
if (op->init_check()) {
add_debug_info_for_null_check_here(op->stub()->info());
// init_state needs acquire, but x86 is TSO, and so we are already good.
__ cmpb(Address(op->klass()->as_register(),
InstanceKlass::init_state_offset()),
InstanceKlass::fully_initialized);
__ jcc(Assembler::notEqual, *op->stub()->entry());
}
__ allocate_object(op->obj()->as_register(),
op->tmp1()->as_register(),
op->tmp2()->as_register(),
op->header_size(),
op->object_size(),
op->klass()->as_register(),
*op->stub()->entry());
__ bind(*op->stub()->continuation());
}
void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
Register len = op->len()->as_register();
__ movslq(len, len);
if (UseSlowPath ||
(!UseFastNewObjectArray && is_reference_type(op->type())) ||
(!UseFastNewTypeArray && !is_reference_type(op->type()))) {
__ jmp(*op->stub()->entry());
} else {
Register tmp1 = op->tmp1()->as_register();
Register tmp2 = op->tmp2()->as_register();
Register tmp3 = op->tmp3()->as_register();
if (len == tmp1) {
tmp1 = tmp3;
} else if (len == tmp2) {
tmp2 = tmp3;
} else if (len == tmp3) {
// everything is ok
} else {
__ mov(tmp3, len);
}
__ allocate_array(op->obj()->as_register(),
len,
tmp1,
tmp2,
arrayOopDesc::base_offset_in_bytes(op->type()),
array_element_size(op->type()),
op->klass()->as_register(),
*op->stub()->entry(),
op->zero_array());
}
__ bind(*op->stub()->continuation());
}
void LIR_Assembler::type_profile_helper(Register mdo,
ciMethodData *md, ciProfileData *data,
Register recv, Label* update_done) {
for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
Label next_test;
// See if the receiver is receiver[n].
__ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
__ jccb(Assembler::notEqual, next_test);
Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
__ addptr(data_addr, DataLayout::counter_increment);
__ jmp(*update_done);
__ bind(next_test);
}
// Didn't find receiver; find next empty slot and fill it in
for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
Label next_test;
Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)));
__ cmpptr(recv_addr, NULL_WORD);
__ jccb(Assembler::notEqual, next_test);
__ movptr(recv_addr, recv);
__ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment);
__ jmp(*update_done);
__ bind(next_test);
}
}
void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
// we always need a stub for the failure case.
CodeStub* stub = op->stub();
Register obj = op->object()->as_register();
Register k_RInfo = op->tmp1()->as_register();
Register klass_RInfo = op->tmp2()->as_register();
Register dst = op->result_opr()->as_register();
ciKlass* k = op->klass();
Register Rtmp1 = noreg;
Register tmp_load_klass = rscratch1;
// check if it needs to be profiled
ciMethodData* md = nullptr;
ciProfileData* data = nullptr;
if (op->should_profile()) {
ciMethod* method = op->profiled_method();
assert(method != nullptr, "Should have method");
int bci = op->profiled_bci();
md = method->method_data_or_null();
assert(md != nullptr, "Sanity");
data = md->bci_to_data(bci);
assert(data != nullptr, "need data for type check");
assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
}
Label* success_target = success;
Label* failure_target = failure;
if (obj == k_RInfo) {
k_RInfo = dst;
} else if (obj == klass_RInfo) {
klass_RInfo = dst;
}
if (k->is_loaded() && !UseCompressedClassPointers) {
select_different_registers(obj, dst, k_RInfo, klass_RInfo);
} else {
Rtmp1 = op->tmp3()->as_register();
select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
}
assert_different_registers(obj, k_RInfo, klass_RInfo);
__ testptr(obj, obj);
if (op->should_profile()) {
Label not_null;
Register mdo = klass_RInfo;
__ mov_metadata(mdo, md->constant_encoding());
__ jccb(Assembler::notEqual, not_null);
// Object is null; update MDO and exit
Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset()));
int header_bits = BitData::null_seen_byte_constant();
__ orb(data_addr, header_bits);
__ jmp(*obj_is_null);
__ bind(not_null);
Label update_done;
Register recv = k_RInfo;
__ load_klass(recv, obj, tmp_load_klass);
type_profile_helper(mdo, md, data, recv, &update_done);
Address nonprofiled_receiver_count_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
__ addptr(nonprofiled_receiver_count_addr, DataLayout::counter_increment);
__ bind(update_done);
} else {
__ jcc(Assembler::equal, *obj_is_null);
}
if (!k->is_loaded()) {
klass2reg_with_patching(k_RInfo, op->info_for_patch());
} else {
__ mov_metadata(k_RInfo, k->constant_encoding());
}
__ verify_oop(obj);
if (op->fast_check()) {
// get object class
// not a safepoint as obj null check happens earlier
if (UseCompressedClassPointers) {
__ load_klass(Rtmp1, obj, tmp_load_klass);
__ cmpptr(k_RInfo, Rtmp1);
} else {
__ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
}
__ jcc(Assembler::notEqual, *failure_target);
// successful cast, fall through to profile or jump
} else {
// get object class
// not a safepoint as obj null check happens earlier
__ load_klass(klass_RInfo, obj, tmp_load_klass);
if (k->is_loaded()) {
// See if we get an immediate positive hit
__ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset()));
if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) {
__ jcc(Assembler::notEqual, *failure_target);
// successful cast, fall through to profile or jump
} else {
// See if we get an immediate positive hit
__ jcc(Assembler::equal, *success_target);
// check for self
__ cmpptr(klass_RInfo, k_RInfo);
__ jcc(Assembler::equal, *success_target);
__ push(klass_RInfo);
__ push(k_RInfo);
__ call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
__ pop(klass_RInfo);
__ pop(klass_RInfo);
// result is a boolean
__ testl(klass_RInfo, klass_RInfo);
__ jcc(Assembler::equal, *failure_target);
// successful cast, fall through to profile or jump
}
} else {
// perform the fast part of the checking logic
__ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
// call out-of-line instance of __ check_klass_subtype_slow_path(...):
__ push(klass_RInfo);
__ push(k_RInfo);
__ call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
__ pop(klass_RInfo);
__ pop(k_RInfo);
// result is a boolean
__ testl(k_RInfo, k_RInfo);
__ jcc(Assembler::equal, *failure_target);
// successful cast, fall through to profile or jump
}
}
__ jmp(*success);
}
void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
Register tmp_load_klass = rscratch1;
LIR_Code code = op->code();
if (code == lir_store_check) {
Register value = op->object()->as_register();
Register array = op->array()->as_register();
Register k_RInfo = op->tmp1()->as_register();
Register klass_RInfo = op->tmp2()->as_register();
Register Rtmp1 = op->tmp3()->as_register();
CodeStub* stub = op->stub();
// check if it needs to be profiled
ciMethodData* md = nullptr;
ciProfileData* data = nullptr;
if (op->should_profile()) {
ciMethod* method = op->profiled_method();
assert(method != nullptr, "Should have method");
int bci = op->profiled_bci();
md = method->method_data_or_null();
assert(md != nullptr, "Sanity");
data = md->bci_to_data(bci);
assert(data != nullptr, "need data for type check");
assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
}
Label done;
Label* success_target = &done;
Label* failure_target = stub->entry();
__ testptr(value, value);
if (op->should_profile()) {
Label not_null;
Register mdo = klass_RInfo;
__ mov_metadata(mdo, md->constant_encoding());
__ jccb(Assembler::notEqual, not_null);
// Object is null; update MDO and exit
Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset()));
int header_bits = BitData::null_seen_byte_constant();
__ orb(data_addr, header_bits);
__ jmp(done);
__ bind(not_null);
Label update_done;
Register recv = k_RInfo;
__ load_klass(recv, value, tmp_load_klass);
type_profile_helper(mdo, md, data, recv, &update_done);
Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
__ addptr(counter_addr, DataLayout::counter_increment);
__ bind(update_done);
} else {
__ jcc(Assembler::equal, done);
}
add_debug_info_for_null_check_here(op->info_for_exception());
__ load_klass(k_RInfo, array, tmp_load_klass);
__ load_klass(klass_RInfo, value, tmp_load_klass);
// get instance klass (it's already uncompressed)
__ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset()));
// perform the fast part of the checking logic
__ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
// call out-of-line instance of __ check_klass_subtype_slow_path(...):
__ push(klass_RInfo);
__ push(k_RInfo);
__ call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
__ pop(klass_RInfo);
__ pop(k_RInfo);
// result is a boolean
__ testl(k_RInfo, k_RInfo);
__ jcc(Assembler::equal, *failure_target);
// fall through to the success case
__ bind(done);
} else
if (code == lir_checkcast) {
Register obj = op->object()->as_register();
Register dst = op->result_opr()->as_register();
Label success;
emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
__ bind(success);
if (dst != obj) {
__ mov(dst, obj);
}
} else
if (code == lir_instanceof) {
Register obj = op->object()->as_register();
Register dst = op->result_opr()->as_register();
Label success, failure, done;
emit_typecheck_helper(op, &success, &failure, &failure);
__ bind(failure);
__ xorptr(dst, dst);
__ jmpb(done);
__ bind(success);
__ movptr(dst, 1);
__ bind(done);
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
if (op->code() == lir_cas_int || op->code() == lir_cas_obj) {
Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
Register newval = op->new_value()->as_register();
Register cmpval = op->cmp_value()->as_register();
assert(cmpval == rax, "wrong register");
assert(newval != noreg, "new val must be register");
assert(cmpval != newval, "cmp and new values must be in different registers");
assert(cmpval != addr, "cmp and addr must be in different registers");
assert(newval != addr, "new value and addr must be in different registers");
if (op->code() == lir_cas_obj) {
if (UseCompressedOops) {
__ encode_heap_oop(cmpval);
__ mov(rscratch1, newval);
__ encode_heap_oop(rscratch1);
__ lock();
// cmpval (rax) is implicitly used by this instruction
__ cmpxchgl(rscratch1, Address(addr, 0));
} else {
__ lock();
__ cmpxchgptr(newval, Address(addr, 0));
}
} else {
assert(op->code() == lir_cas_int, "lir_cas_int expected");
__ lock();
__ cmpxchgl(newval, Address(addr, 0));
}
} else if (op->code() == lir_cas_long) {
Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
Register newval = op->new_value()->as_register_lo();
Register cmpval = op->cmp_value()->as_register_lo();
assert(cmpval == rax, "wrong register");
assert(newval != noreg, "new val must be register");
assert(cmpval != newval, "cmp and new values must be in different registers");
assert(cmpval != addr, "cmp and addr must be in different registers");
assert(newval != addr, "new value and addr must be in different registers");
__ lock();
__ cmpxchgq(newval, Address(addr, 0));
} else {
Unimplemented();
}
}
void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type,
LIR_Opr cmp_opr1, LIR_Opr cmp_opr2) {
assert(cmp_opr1 == LIR_OprFact::illegalOpr && cmp_opr2 == LIR_OprFact::illegalOpr, "unnecessary cmp oprs on x86");
Assembler::Condition acond, ncond;
switch (condition) {
case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break;
case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break;
case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break;
case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break;
case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break;
case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break;
case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break;
case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break;
default: acond = Assembler::equal; ncond = Assembler::notEqual;
ShouldNotReachHere();
}
if (opr1->is_cpu_register()) {
reg2reg(opr1, result);
} else if (opr1->is_stack()) {
stack2reg(opr1, result, result->type());
} else if (opr1->is_constant()) {
const2reg(opr1, result, lir_patch_none, nullptr);
} else {
ShouldNotReachHere();
}
if (VM_Version::supports_cmov() && !opr2->is_constant()) {
// optimized version that does not require a branch
if (opr2->is_single_cpu()) {
assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move");
__ cmov(ncond, result->as_register(), opr2->as_register());
} else if (opr2->is_double_cpu()) {
assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
__ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo());
} else if (opr2->is_single_stack()) {
__ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix()));
} else if (opr2->is_double_stack()) {
__ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes));
} else {
ShouldNotReachHere();
}
} else {
Label skip;
__ jccb(acond, skip);
if (opr2->is_cpu_register()) {
reg2reg(opr2, result);
} else if (opr2->is_stack()) {
stack2reg(opr2, result, result->type());
} else if (opr2->is_constant()) {
const2reg(opr2, result, lir_patch_none, nullptr);
} else {
ShouldNotReachHere();
}
__ bind(skip);
}
}
void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info) {
assert(info == nullptr, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
if (left->is_single_cpu()) {
assert(left == dest, "left and dest must be equal");
Register lreg = left->as_register();
if (right->is_single_cpu()) {
// cpu register - cpu register
Register rreg = right->as_register();
switch (code) {
case lir_add: __ addl (lreg, rreg); break;
case lir_sub: __ subl (lreg, rreg); break;
case lir_mul: __ imull(lreg, rreg); break;
default: ShouldNotReachHere();
}
} else if (right->is_stack()) {
// cpu register - stack
Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
switch (code) {
case lir_add: __ addl(lreg, raddr); break;
case lir_sub: __ subl(lreg, raddr); break;
default: ShouldNotReachHere();
}
} else if (right->is_constant()) {
// cpu register - constant
jint c = right->as_constant_ptr()->as_jint();
switch (code) {
case lir_add: {
__ incrementl(lreg, c);
break;
}
case lir_sub: {
__ decrementl(lreg, c);
break;
}
default: ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
} else if (left->is_double_cpu()) {
assert(left == dest, "left and dest must be equal");
Register lreg_lo = left->as_register_lo();
Register lreg_hi = left->as_register_hi();
if (right->is_double_cpu()) {
// cpu register - cpu register
Register rreg_lo = right->as_register_lo();
Register rreg_hi = right->as_register_hi();
assert_different_registers(lreg_lo, rreg_lo);
switch (code) {
case lir_add:
__ addptr(lreg_lo, rreg_lo);
break;
case lir_sub:
__ subptr(lreg_lo, rreg_lo);
break;
case lir_mul:
__ imulq(lreg_lo, rreg_lo);
break;
default:
ShouldNotReachHere();
}
} else if (right->is_constant()) {
// cpu register - constant
jlong c = right->as_constant_ptr()->as_jlong_bits();
__ movptr(r10, (intptr_t) c);
switch (code) {
case lir_add:
__ addptr(lreg_lo, r10);
break;
case lir_sub:
__ subptr(lreg_lo, r10);
break;
default:
ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
} else if (left->is_single_xmm()) {
assert(left == dest, "left and dest must be equal");
XMMRegister lreg = left->as_xmm_float_reg();
if (right->is_single_xmm()) {
XMMRegister rreg = right->as_xmm_float_reg();
switch (code) {
case lir_add: __ addss(lreg, rreg); break;
case lir_sub: __ subss(lreg, rreg); break;
case lir_mul: __ mulss(lreg, rreg); break;
case lir_div: __ divss(lreg, rreg); break;
default: ShouldNotReachHere();
}
} else {
Address raddr;
if (right->is_single_stack()) {
raddr = frame_map()->address_for_slot(right->single_stack_ix());
} else if (right->is_constant()) {
// hack for now
raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat())));
} else {
ShouldNotReachHere();
}
switch (code) {
case lir_add: __ addss(lreg, raddr); break;
case lir_sub: __ subss(lreg, raddr); break;
case lir_mul: __ mulss(lreg, raddr); break;
case lir_div: __ divss(lreg, raddr); break;
default: ShouldNotReachHere();
}
}
} else if (left->is_double_xmm()) {
assert(left == dest, "left and dest must be equal");
XMMRegister lreg = left->as_xmm_double_reg();
if (right->is_double_xmm()) {
XMMRegister rreg = right->as_xmm_double_reg();
switch (code) {
case lir_add: __ addsd(lreg, rreg); break;
case lir_sub: __ subsd(lreg, rreg); break;
case lir_mul: __ mulsd(lreg, rreg); break;
case lir_div: __ divsd(lreg, rreg); break;
default: ShouldNotReachHere();
}
} else {
Address raddr;
if (right->is_double_stack()) {
raddr = frame_map()->address_for_slot(right->double_stack_ix());
} else if (right->is_constant()) {
// hack for now
raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
} else {
ShouldNotReachHere();
}
switch (code) {
case lir_add: __ addsd(lreg, raddr); break;
case lir_sub: __ subsd(lreg, raddr); break;
case lir_mul: __ mulsd(lreg, raddr); break;
case lir_div: __ divsd(lreg, raddr); break;
default: ShouldNotReachHere();
}
}
} else if (left->is_single_stack() || left->is_address()) {
assert(left == dest, "left and dest must be equal");
Address laddr;
if (left->is_single_stack()) {
laddr = frame_map()->address_for_slot(left->single_stack_ix());
} else if (left->is_address()) {
laddr = as_Address(left->as_address_ptr());
} else {
ShouldNotReachHere();
}
if (right->is_single_cpu()) {
Register rreg = right->as_register();
switch (code) {
case lir_add: __ addl(laddr, rreg); break;
case lir_sub: __ subl(laddr, rreg); break;
default: ShouldNotReachHere();
}
} else if (right->is_constant()) {
jint c = right->as_constant_ptr()->as_jint();
switch (code) {
case lir_add: {
__ incrementl(laddr, c);
break;
}
case lir_sub: {
__ decrementl(laddr, c);
break;
}
default: ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr tmp, LIR_Opr dest, LIR_Op* op) {
if (value->is_double_xmm()) {
switch(code) {
case lir_abs :
{
if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) {
__ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg());
}
assert(!tmp->is_valid(), "do not need temporary");
__ andpd(dest->as_xmm_double_reg(),
ExternalAddress((address)double_signmask_pool),
rscratch1);
}
break;
case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break;
// all other intrinsics are not available in the SSE instruction set, so FPU is used
default : ShouldNotReachHere();
}
} else if (code == lir_f2hf) {
__ flt_to_flt16(dest->as_register(), value->as_xmm_float_reg(), tmp->as_xmm_float_reg());
} else if (code == lir_hf2f) {
__ flt16_to_flt(dest->as_xmm_float_reg(), value->as_register());
} else {
Unimplemented();
}
}
void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
// assert(left->destroys_register(), "check");
if (left->is_single_cpu()) {
Register reg = left->as_register();
if (right->is_constant()) {
int val = right->as_constant_ptr()->as_jint();
switch (code) {
case lir_logic_and: __ andl (reg, val); break;
case lir_logic_or: __ orl (reg, val); break;
case lir_logic_xor: __ xorl (reg, val); break;
default: ShouldNotReachHere();
}
} else if (right->is_stack()) {
// added support for stack operands
Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
switch (code) {
case lir_logic_and: __ andl (reg, raddr); break;
case lir_logic_or: __ orl (reg, raddr); break;
case lir_logic_xor: __ xorl (reg, raddr); break;
default: ShouldNotReachHere();
}
} else {
Register rright = right->as_register();
switch (code) {
case lir_logic_and: __ andptr (reg, rright); break;
case lir_logic_or : __ orptr (reg, rright); break;
case lir_logic_xor: __ xorptr (reg, rright); break;
default: ShouldNotReachHere();
}
}
move_regs(reg, dst->as_register());
} else {
Register l_lo = left->as_register_lo();
Register l_hi = left->as_register_hi();
if (right->is_constant()) {
__ mov64(rscratch1, right->as_constant_ptr()->as_jlong());
switch (code) {
case lir_logic_and:
__ andq(l_lo, rscratch1);
break;
case lir_logic_or:
__ orq(l_lo, rscratch1);
break;
case lir_logic_xor:
__ xorq(l_lo, rscratch1);
break;
default: ShouldNotReachHere();
}
} else {
Register r_lo;
if (is_reference_type(right->type())) {
r_lo = right->as_register();
} else {
r_lo = right->as_register_lo();
}
switch (code) {
case lir_logic_and:
__ andptr(l_lo, r_lo);
break;
case lir_logic_or:
__ orptr(l_lo, r_lo);
break;
case lir_logic_xor:
__ xorptr(l_lo, r_lo);
break;
default: ShouldNotReachHere();
}
}
Register dst_lo = dst->as_register_lo();
Register dst_hi = dst->as_register_hi();
move_regs(l_lo, dst_lo);
}
}
// we assume that rax, and rdx can be overwritten
void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) {
assert(left->is_single_cpu(), "left must be register");
assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
assert(result->is_single_cpu(), "result must be register");
// assert(left->destroys_register(), "check");
// assert(right->destroys_register(), "check");
Register lreg = left->as_register();
Register dreg = result->as_register();
if (right->is_constant()) {
jint divisor = right->as_constant_ptr()->as_jint();
assert(divisor > 0 && is_power_of_2(divisor), "must be");
if (code == lir_idiv) {
assert(lreg == rax, "must be rax,");
assert(temp->as_register() == rdx, "tmp register must be rdx");
__ cdql(); // sign extend into rdx:rax
if (divisor == 2) {
__ subl(lreg, rdx);
} else {
__ andl(rdx, divisor - 1);
__ addl(lreg, rdx);
}
__ sarl(lreg, log2i_exact(divisor));
move_regs(lreg, dreg);
} else if (code == lir_irem) {
Label done;
__ mov(dreg, lreg);
__ andl(dreg, 0x80000000 | (divisor - 1));
__ jcc(Assembler::positive, done);
__ decrement(dreg);
__ orl(dreg, ~(divisor - 1));
__ increment(dreg);
__ bind(done);
} else {
ShouldNotReachHere();
}
} else {
Register rreg = right->as_register();
assert(lreg == rax, "left register must be rax,");
assert(rreg != rdx, "right register must not be rdx");
assert(temp->as_register() == rdx, "tmp register must be rdx");
move_regs(lreg, rax);
int idivl_offset = __ corrected_idivl(rreg);
if (ImplicitDiv0Checks) {
add_debug_info_for_div0(idivl_offset, info);
}
if (code == lir_irem) {
move_regs(rdx, dreg); // result is in rdx
} else {
move_regs(rax, dreg);
}
}
}
void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
if (opr1->is_single_cpu()) {
Register reg1 = opr1->as_register();
if (opr2->is_single_cpu()) {
// cpu register - cpu register
if (is_reference_type(opr1->type())) {
__ cmpoop(reg1, opr2->as_register());
} else {
assert(!is_reference_type(opr2->type()), "cmp int, oop?");
__ cmpl(reg1, opr2->as_register());
}
} else if (opr2->is_stack()) {
// cpu register - stack
if (is_reference_type(opr1->type())) {
__ cmpoop(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
} else {
__ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
}
} else if (opr2->is_constant()) {
// cpu register - constant
LIR_Const* c = opr2->as_constant_ptr();
if (c->type() == T_INT) {
jint i = c->as_jint();
if (i == 0) {
__ testl(reg1, reg1);
} else {
__ cmpl(reg1, i);
}
} else if (c->type() == T_METADATA) {
// All we need for now is a comparison with null for equality.
assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "oops");
Metadata* m = c->as_metadata();
if (m == nullptr) {
__ testptr(reg1, reg1);
} else {
ShouldNotReachHere();
}
} else if (is_reference_type(c->type())) {
// In 64bit oops are single register
jobject o = c->as_jobject();
if (o == nullptr) {
__ testptr(reg1, reg1);
} else {
__ cmpoop(reg1, o, rscratch1);
}
} else {
fatal("unexpected type: %s", basictype_to_str(c->type()));
}
// cpu register - address
} else if (opr2->is_address()) {
if (op->info() != nullptr) {
add_debug_info_for_null_check_here(op->info());
}
__ cmpl(reg1, as_Address(opr2->as_address_ptr()));
} else {
ShouldNotReachHere();
}
} else if(opr1->is_double_cpu()) {
Register xlo = opr1->as_register_lo();
Register xhi = opr1->as_register_hi();
if (opr2->is_double_cpu()) {
__ cmpptr(xlo, opr2->as_register_lo());
} else if (opr2->is_constant()) {
// cpu register - constant 0
assert(opr2->as_jlong() == (jlong)0, "only handles zero");
__ cmpptr(xlo, (int32_t)opr2->as_jlong());
} else {
ShouldNotReachHere();
}
} else if (opr1->is_single_xmm()) {
XMMRegister reg1 = opr1->as_xmm_float_reg();
if (opr2->is_single_xmm()) {
// xmm register - xmm register
__ ucomiss(reg1, opr2->as_xmm_float_reg());
} else if (opr2->is_stack()) {
// xmm register - stack
__ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
} else if (opr2->is_constant()) {
// xmm register - constant
__ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat())));
} else if (opr2->is_address()) {
// xmm register - address
if (op->info() != nullptr) {
add_debug_info_for_null_check_here(op->info());
}
__ ucomiss(reg1, as_Address(opr2->as_address_ptr()));
} else {
ShouldNotReachHere();
}
} else if (opr1->is_double_xmm()) {
XMMRegister reg1 = opr1->as_xmm_double_reg();
if (opr2->is_double_xmm()) {
// xmm register - xmm register
__ ucomisd(reg1, opr2->as_xmm_double_reg());
} else if (opr2->is_stack()) {
// xmm register - stack
__ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix()));
} else if (opr2->is_constant()) {
// xmm register - constant
__ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble())));
} else if (opr2->is_address()) {
// xmm register - address
if (op->info() != nullptr) {
add_debug_info_for_null_check_here(op->info());
}
__ ucomisd(reg1, as_Address(opr2->pointer()->as_address()));
} else {
ShouldNotReachHere();
}
} else if (opr1->is_address() && opr2->is_constant()) {
LIR_Const* c = opr2->as_constant_ptr();
if (is_reference_type(c->type())) {
assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse");
__ movoop(rscratch1, c->as_jobject());
}
if (op->info() != nullptr) {
add_debug_info_for_null_check_here(op->info());
}
// special case: address - constant
LIR_Address* addr = opr1->as_address_ptr();
if (c->type() == T_INT) {
__ cmpl(as_Address(addr), c->as_jint());
} else if (is_reference_type(c->type())) {
// %%% Make this explode if addr isn't reachable until we figure out a
// better strategy by giving noreg as the temp for as_Address
__ cmpoop(rscratch1, as_Address(addr, noreg));
} else {
ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) {
if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
if (left->is_single_xmm()) {
assert(right->is_single_xmm(), "must match");
__ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i);
} else if (left->is_double_xmm()) {
assert(right->is_double_xmm(), "must match");
__ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i);
} else {
ShouldNotReachHere();
}
} else {
assert(code == lir_cmp_l2i, "check");
Label done;
Register dest = dst->as_register();
__ cmpptr(left->as_register_lo(), right->as_register_lo());
__ movl(dest, -1);
__ jccb(Assembler::less, done);
__ setb(Assembler::notZero, dest);
__ movzbl(dest, dest);
__ bind(done);
}
}
void LIR_Assembler::align_call(LIR_Code code) {
// make sure that the displacement word of the call ends up word aligned
int offset = __ offset();
switch (code) {
case lir_static_call:
case lir_optvirtual_call:
case lir_dynamic_call:
offset += NativeCall::displacement_offset;
break;
case lir_icvirtual_call:
offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size_rex;
break;
default: ShouldNotReachHere();
}
__ align(BytesPerWord, offset);
}
void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
assert((__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
"must be aligned");
__ call(AddressLiteral(op->addr(), rtype));
add_call_info(code_offset(), op->info());
__ post_call_nop();
}
void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
__ ic_call(op->addr());
add_call_info(code_offset(), op->info());
assert((__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0,
"must be aligned");
__ post_call_nop();
}
void LIR_Assembler::emit_static_call_stub() {
address call_pc = __ pc();
address stub = __ start_a_stub(call_stub_size());
if (stub == nullptr) {
bailout("static call stub overflow");
return;
}
int start = __ offset();
// make sure that the displacement word of the call ends up word aligned
__ align(BytesPerWord, __ offset() + NativeMovConstReg::instruction_size_rex + NativeCall::displacement_offset);
__ relocate(static_stub_Relocation::spec(call_pc));
__ mov_metadata(rbx, (Metadata*)nullptr);
// must be set to -1 at code generation time
assert(((__ offset() + 1) % BytesPerWord) == 0, "must be aligned");
// On 64bit this will die since it will take a movq & jmp, must be only a jmp
__ jump(RuntimeAddress(__ pc()));
assert(__ offset() - start <= call_stub_size(), "stub too big");
__ end_a_stub();
}
void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
assert(exceptionOop->as_register() == rax, "must match");
assert(exceptionPC->as_register() == rdx, "must match");
// exception object is not added to oop map by LinearScan
// (LinearScan assumes that no oops are in fixed registers)
info->add_register_oop(exceptionOop);
C1StubId unwind_id;
// get current pc information
// pc is only needed if the method has an exception handler, the unwind code does not need it.
int pc_for_athrow_offset = __ offset();
InternalAddress pc_for_athrow(__ pc());
__ lea(exceptionPC->as_register(), pc_for_athrow);
add_call_info(pc_for_athrow_offset, info); // for exception handler
__ verify_not_null_oop(rax);
// search an exception handler (rax: exception oop, rdx: throwing pc)
if (compilation()->has_fpu_code()) {
unwind_id = C1StubId::handle_exception_id;
} else {
unwind_id = C1StubId::handle_exception_nofpu_id;
}
__ call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
// enough room for two byte trap
__ nop();
}
void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
assert(exceptionOop->as_register() == rax, "must match");
__ jmp(_unwind_handler_entry);
}
void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
// optimized version for linear scan:
// * count must be already in ECX (guaranteed by LinearScan)
// * left and dest must be equal
// * tmp must be unused
assert(count->as_register() == SHIFT_count, "count must be in ECX");
assert(left == dest, "left and dest must be equal");
assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
if (left->is_single_cpu()) {
Register value = left->as_register();
assert(value != SHIFT_count, "left cannot be ECX");
switch (code) {
case lir_shl: __ shll(value); break;
case lir_shr: __ sarl(value); break;
case lir_ushr: __ shrl(value); break;
default: ShouldNotReachHere();
}
} else if (left->is_double_cpu()) {
Register lo = left->as_register_lo();
Register hi = left->as_register_hi();
assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX");
switch (code) {
case lir_shl: __ shlptr(lo); break;
case lir_shr: __ sarptr(lo); break;
case lir_ushr: __ shrptr(lo); break;
default: ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
if (dest->is_single_cpu()) {
// first move left into dest so that left is not destroyed by the shift
Register value = dest->as_register();
count = count & 0x1F; // Java spec
move_regs(left->as_register(), value);
switch (code) {
case lir_shl: __ shll(value, count); break;
case lir_shr: __ sarl(value, count); break;
case lir_ushr: __ shrl(value, count); break;
default: ShouldNotReachHere();
}
} else if (dest->is_double_cpu()) {
// first move left into dest so that left is not destroyed by the shift
Register value = dest->as_register_lo();
count = count & 0x1F; // Java spec
move_regs(left->as_register_lo(), value);
switch (code) {
case lir_shl: __ shlptr(value, count); break;
case lir_shr: __ sarptr(value, count); break;
case lir_ushr: __ shrptr(value, count); break;
default: ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
__ movptr (Address(rsp, offset_from_rsp_in_bytes), r);
}
void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) {
assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
__ movptr (Address(rsp, offset_from_rsp_in_bytes), c);
}
void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) {
assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
__ movoop(Address(rsp, offset_from_rsp_in_bytes), o, rscratch1);
}
void LIR_Assembler::store_parameter(Metadata* m, int offset_from_rsp_in_words) {
assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
__ mov_metadata(Address(rsp, offset_from_rsp_in_bytes), m, rscratch1);
}
// This code replaces a call to arraycopy; no exception may
// be thrown in this code, they must be thrown in the System.arraycopy
// activation frame; we could save some checks if this would not be the case
void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
ciArrayKlass* default_type = op->expected_type();
Register src = op->src()->as_register();
Register dst = op->dst()->as_register();
Register src_pos = op->src_pos()->as_register();
Register dst_pos = op->dst_pos()->as_register();
Register length = op->length()->as_register();
Register tmp = op->tmp()->as_register();
Register tmp_load_klass = rscratch1;
Register tmp2 = UseCompactObjectHeaders ? rscratch2 : noreg;
CodeStub* stub = op->stub();
int flags = op->flags();
BasicType basic_type = default_type != nullptr ? default_type->element_type()->basic_type() : T_ILLEGAL;
if (is_reference_type(basic_type)) basic_type = T_OBJECT;
// if we don't know anything, just go through the generic arraycopy
if (default_type == nullptr) {
// save outgoing arguments on stack in case call to System.arraycopy is needed
// HACK ALERT. This code used to push the parameters in a hardwired fashion
// for interpreter calling conventions. Now we have to do it in new style conventions.
// For the moment until C1 gets the new register allocator I just force all the
// args to the right place (except the register args) and then on the back side
// reload the register args properly if we go slow path. Yuck
// These are proper for the calling convention
store_parameter(length, 2);
store_parameter(dst_pos, 1);
store_parameter(dst, 0);
// these are just temporary placements until we need to reload
store_parameter(src_pos, 3);
store_parameter(src, 4);
address copyfunc_addr = StubRoutines::generic_arraycopy();
assert(copyfunc_addr != nullptr, "generic arraycopy stub required");
// pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint
// The arguments are in java calling convention so we can trivially shift them to C
// convention
assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
__ mov(c_rarg0, j_rarg0);
assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
__ mov(c_rarg1, j_rarg1);
assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
__ mov(c_rarg2, j_rarg2);
assert_different_registers(c_rarg3, j_rarg4);
__ mov(c_rarg3, j_rarg3);
#ifdef _WIN64
// Allocate abi space for args but be sure to keep stack aligned
__ subptr(rsp, 6*wordSize);
store_parameter(j_rarg4, 4);
#ifndef PRODUCT
if (PrintC1Statistics) {
__ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt), rscratch1);
}
#endif
__ call(RuntimeAddress(copyfunc_addr));
__ addptr(rsp, 6*wordSize);
#else
__ mov(c_rarg4, j_rarg4);
#ifndef PRODUCT
if (PrintC1Statistics) {
__ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt), rscratch1);
}
#endif
__ call(RuntimeAddress(copyfunc_addr));
#endif // _WIN64
__ testl(rax, rax);
__ jcc(Assembler::equal, *stub->continuation());
__ mov(tmp, rax);
__ xorl(tmp, -1);
// Reload values from the stack so they are where the stub
// expects them.
__ movptr (dst, Address(rsp, 0*BytesPerWord));
__ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
__ movptr (length, Address(rsp, 2*BytesPerWord));
__ movptr (src_pos, Address(rsp, 3*BytesPerWord));
__ movptr (src, Address(rsp, 4*BytesPerWord));
__ subl(length, tmp);
__ addl(src_pos, tmp);
__ addl(dst_pos, tmp);
__ jmp(*stub->entry());
__ bind(*stub->continuation());
return;
}
assert(default_type != nullptr && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
int elem_size = type2aelembytes(basic_type);
Address::ScaleFactor scale;
switch (elem_size) {
case 1 :
scale = Address::times_1;
break;
case 2 :
scale = Address::times_2;
break;
case 4 :
scale = Address::times_4;
break;
case 8 :
scale = Address::times_8;
break;
default:
scale = Address::no_scale;
ShouldNotReachHere();
}
Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
// length and pos's are all sign extended at this point on 64bit
// test for null
if (flags & LIR_OpArrayCopy::src_null_check) {
__ testptr(src, src);
__ jcc(Assembler::zero, *stub->entry());
}
if (flags & LIR_OpArrayCopy::dst_null_check) {
__ testptr(dst, dst);
__ jcc(Assembler::zero, *stub->entry());
}
// If the compiler was not able to prove that exact type of the source or the destination
// of the arraycopy is an array type, check at runtime if the source or the destination is
// an instance type.
if (flags & LIR_OpArrayCopy::type_check) {
if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
__ load_klass(tmp, dst, tmp_load_klass);
__ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
__ jcc(Assembler::greaterEqual, *stub->entry());
}
if (!(flags & LIR_OpArrayCopy::src_objarray)) {
__ load_klass(tmp, src, tmp_load_klass);
__ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
__ jcc(Assembler::greaterEqual, *stub->entry());
}
}
// check if negative
if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
__ testl(src_pos, src_pos);
__ jcc(Assembler::less, *stub->entry());
}
if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
__ testl(dst_pos, dst_pos);
__ jcc(Assembler::less, *stub->entry());
}
if (flags & LIR_OpArrayCopy::src_range_check) {
__ lea(tmp, Address(src_pos, length, Address::times_1, 0));
__ cmpl(tmp, src_length_addr);
__ jcc(Assembler::above, *stub->entry());
}
if (flags & LIR_OpArrayCopy::dst_range_check) {
__ lea(tmp, Address(dst_pos, length, Address::times_1, 0));
__ cmpl(tmp, dst_length_addr);
__ jcc(Assembler::above, *stub->entry());
}
if (flags & LIR_OpArrayCopy::length_positive_check) {
__ testl(length, length);
__ jcc(Assembler::less, *stub->entry());
}
__ movl2ptr(src_pos, src_pos); //higher 32bits must be null
__ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null
if (flags & LIR_OpArrayCopy::type_check) {
// We don't know the array types are compatible
if (basic_type != T_OBJECT) {
// Simple test for basic type arrays
__ cmp_klasses_from_objects(src, dst, tmp, tmp2);
__ jcc(Assembler::notEqual, *stub->entry());
} else {
// For object arrays, if src is a sub class of dst then we can
// safely do the copy.
Label cont, slow;
__ push(src);
__ push(dst);
__ load_klass(src, src, tmp_load_klass);
__ load_klass(dst, dst, tmp_load_klass);
__ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, nullptr);
__ push(src);
__ push(dst);
__ call(RuntimeAddress(Runtime1::entry_for(C1StubId::slow_subtype_check_id)));
__ pop(dst);
__ pop(src);
__ testl(src, src);
__ jcc(Assembler::notEqual, cont);
__ bind(slow);
__ pop(dst);
__ pop(src);
address copyfunc_addr = StubRoutines::checkcast_arraycopy();
if (copyfunc_addr != nullptr) { // use stub if available
// src is not a sub class of dst so we have to do a
// per-element check.
int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray;
if ((flags & mask) != mask) {
// Check that at least both of them object arrays.
assert(flags & mask, "one of the two should be known to be an object array");
if (!(flags & LIR_OpArrayCopy::src_objarray)) {
__ load_klass(tmp, src, tmp_load_klass);
} else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
__ load_klass(tmp, dst, tmp_load_klass);
}
int lh_offset = in_bytes(Klass::layout_helper_offset());
Address klass_lh_addr(tmp, lh_offset);
jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
__ cmpl(klass_lh_addr, objArray_lh);
__ jcc(Assembler::notEqual, *stub->entry());
}
// Spill because stubs can use any register they like and it's
// easier to restore just those that we care about.
store_parameter(dst, 0);
store_parameter(dst_pos, 1);
store_parameter(length, 2);
store_parameter(src_pos, 3);
store_parameter(src, 4);
__ movl2ptr(length, length); //higher 32bits must be null
__ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
assert_different_registers(c_rarg0, dst, dst_pos, length);
__ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
assert_different_registers(c_rarg1, dst, length);
__ mov(c_rarg2, length);
assert_different_registers(c_rarg2, dst);
#ifdef _WIN64
// Allocate abi space for args but be sure to keep stack aligned
__ subptr(rsp, 6*wordSize);
__ load_klass(c_rarg3, dst, tmp_load_klass);
__ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset()));
store_parameter(c_rarg3, 4);
__ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset()));
__ call(RuntimeAddress(copyfunc_addr));
__ addptr(rsp, 6*wordSize);
#else
__ load_klass(c_rarg4, dst, tmp_load_klass);
__ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset()));
__ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset()));
__ call(RuntimeAddress(copyfunc_addr));
#endif
#ifndef PRODUCT
if (PrintC1Statistics) {
Label failed;
__ testl(rax, rax);
__ jcc(Assembler::notZero, failed);
__ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt), rscratch1);
__ bind(failed);
}
#endif
__ testl(rax, rax);
__ jcc(Assembler::zero, *stub->continuation());
#ifndef PRODUCT
if (PrintC1Statistics) {
__ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt), rscratch1);
}
#endif
__ mov(tmp, rax);
__ xorl(tmp, -1);
// Restore previously spilled arguments
__ movptr (dst, Address(rsp, 0*BytesPerWord));
__ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
__ movptr (length, Address(rsp, 2*BytesPerWord));
__ movptr (src_pos, Address(rsp, 3*BytesPerWord));
__ movptr (src, Address(rsp, 4*BytesPerWord));
__ subl(length, tmp);
__ addl(src_pos, tmp);
__ addl(dst_pos, tmp);
}
__ jmp(*stub->entry());
__ bind(cont);
__ pop(dst);
__ pop(src);
}
}
#ifdef ASSERT
if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
// Sanity check the known type with the incoming class. For the
// primitive case the types must match exactly with src.klass and
// dst.klass each exactly matching the default type. For the
// object array case, if no type check is needed then either the
// dst type is exactly the expected type and the src type is a
// subtype which we can't check or src is the same array as dst
// but not necessarily exactly of type default_type.
Label known_ok, halt;
__ mov_metadata(tmp, default_type->constant_encoding());
if (UseCompressedClassPointers) {
__ encode_klass_not_null(tmp, rscratch1);
}
if (basic_type != T_OBJECT) {
__ cmp_klass(tmp, dst, tmp2);
__ jcc(Assembler::notEqual, halt);
__ cmp_klass(tmp, src, tmp2);
__ jcc(Assembler::equal, known_ok);
} else {
__ cmp_klass(tmp, dst, tmp2);
__ jcc(Assembler::equal, known_ok);
__ cmpptr(src, dst);
__ jcc(Assembler::equal, known_ok);
}
__ bind(halt);
__ stop("incorrect type information in arraycopy");
__ bind(known_ok);
}
#endif
#ifndef PRODUCT
if (PrintC1Statistics) {
__ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type)), rscratch1);
}
#endif
assert_different_registers(c_rarg0, dst, dst_pos, length);
__ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
assert_different_registers(c_rarg1, length);
__ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
__ mov(c_rarg2, length);
bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0;
bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0;
const char *name;
address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false);
__ call_VM_leaf(entry, 0);
if (stub != nullptr) {
__ bind(*stub->continuation());
}
}
void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) {
assert(op->crc()->is_single_cpu(), "crc must be register");
assert(op->val()->is_single_cpu(), "byte value must be register");
assert(op->result_opr()->is_single_cpu(), "result must be register");
Register crc = op->crc()->as_register();
Register val = op->val()->as_register();
Register res = op->result_opr()->as_register();
assert_different_registers(val, crc, res);
__ lea(res, ExternalAddress(StubRoutines::crc_table_addr()));
__ notl(crc); // ~crc
__ update_byte_crc32(crc, val, res);
__ notl(crc); // ~crc
__ mov(res, crc);
}
void LIR_Assembler::emit_lock(LIR_OpLock* op) {
Register obj = op->obj_opr()->as_register(); // may not be an oop
Register hdr = op->hdr_opr()->as_register();
Register lock = op->lock_opr()->as_register();
if (LockingMode == LM_MONITOR) {
if (op->info() != nullptr) {
add_debug_info_for_null_check_here(op->info());
__ null_check(obj);
}
__ jmp(*op->stub()->entry());
} else if (op->code() == lir_lock) {
assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
Register tmp = LockingMode == LM_LIGHTWEIGHT ? op->scratch_opr()->as_register() : noreg;
// add debug info for NullPointerException only if one is possible
int null_check_offset = __ lock_object(hdr, obj, lock, tmp, *op->stub()->entry());
if (op->info() != nullptr) {
add_debug_info_for_null_check(null_check_offset, op->info());
}
// done
} else if (op->code() == lir_unlock) {
assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
__ unlock_object(hdr, obj, lock, *op->stub()->entry());
} else {
Unimplemented();
}
__ bind(*op->stub()->continuation());
}
void LIR_Assembler::emit_load_klass(LIR_OpLoadKlass* op) {
Register obj = op->obj()->as_pointer_register();
Register result = op->result_opr()->as_pointer_register();
CodeEmitInfo* info = op->info();
if (info != nullptr) {
add_debug_info_for_null_check_here(info);
}
__ load_klass(result, obj, rscratch1);
}
void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
ciMethod* method = op->profiled_method();
int bci = op->profiled_bci();
ciMethod* callee = op->profiled_callee();
Register tmp_load_klass = rscratch1;
// Update counter for all call types
ciMethodData* md = method->method_data_or_null();
assert(md != nullptr, "Sanity");
ciProfileData* data = md->bci_to_data(bci);
assert(data != nullptr && data->is_CounterData(), "need CounterData for calls");
assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
Register mdo = op->mdo()->as_register();
__ mov_metadata(mdo, md->constant_encoding());
Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
// Perform additional virtual call profiling for invokevirtual and
// invokeinterface bytecodes
if (op->should_profile_receiver_type()) {
assert(op->recv()->is_single_cpu(), "recv must be allocated");
Register recv = op->recv()->as_register();
assert_different_registers(mdo, recv);
assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
ciKlass* known_klass = op->known_holder();
if (C1OptimizeVirtualCallProfiling && known_klass != nullptr) {
// We know the type that will be seen at this call site; we can
// statically update the MethodData* rather than needing to do
// dynamic tests on the receiver type
// NOTE: we should probably put a lock around this search to
// avoid collisions by concurrent compilations
ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
uint i;
for (i = 0; i < VirtualCallData::row_limit(); i++) {
ciKlass* receiver = vc_data->receiver(i);
if (known_klass->equals(receiver)) {
Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
__ addptr(data_addr, DataLayout::counter_increment);
return;
}
}
// Receiver type not found in profile data; select an empty slot
// Note that this is less efficient than it should be because it
// always does a write to the receiver part of the
// VirtualCallData rather than just the first time
for (i = 0; i < VirtualCallData::row_limit(); i++) {
ciKlass* receiver = vc_data->receiver(i);
if (receiver == nullptr) {
Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
__ mov_metadata(recv_addr, known_klass->constant_encoding(), rscratch1);
Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
__ addptr(data_addr, DataLayout::counter_increment);
return;
}
}
} else {
__ load_klass(recv, recv, tmp_load_klass);
Label update_done;
type_profile_helper(mdo, md, data, recv, &update_done);
// Receiver did not match any saved receiver and there is no empty row for it.
// Increment total counter to indicate polymorphic case.
__ addptr(counter_addr, DataLayout::counter_increment);
__ bind(update_done);
}
} else {
// Static call
__ addptr(counter_addr, DataLayout::counter_increment);
}
}
void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) {
Register obj = op->obj()->as_register();
Register tmp = op->tmp()->as_pointer_register();
Register tmp_load_klass = rscratch1;
Address mdo_addr = as_Address(op->mdp()->as_address_ptr());
ciKlass* exact_klass = op->exact_klass();
intptr_t current_klass = op->current_klass();
bool not_null = op->not_null();
bool no_conflict = op->no_conflict();
Label update, next, none;
bool do_null = !not_null;
bool exact_klass_set = exact_klass != nullptr && ciTypeEntries::valid_ciklass(current_klass) == exact_klass;
bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set;
assert(do_null || do_update, "why are we here?");
assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?");
__ verify_oop(obj);
#ifdef ASSERT
if (obj == tmp) {
assert_different_registers(obj, rscratch1, mdo_addr.base(), mdo_addr.index());
} else {
assert_different_registers(obj, tmp, rscratch1, mdo_addr.base(), mdo_addr.index());
}
#endif
if (do_null) {
__ testptr(obj, obj);
__ jccb(Assembler::notZero, update);
if (!TypeEntries::was_null_seen(current_klass)) {
__ testptr(mdo_addr, TypeEntries::null_seen);
#ifndef ASSERT
__ jccb(Assembler::notZero, next); // already set
#else
__ jcc(Assembler::notZero, next); // already set
#endif
// atomic update to prevent overwriting Klass* with 0
__ lock();
__ orptr(mdo_addr, TypeEntries::null_seen);
}
if (do_update) {
#ifndef ASSERT
__ jmpb(next);
}
#else
__ jmp(next);
}
} else {
__ testptr(obj, obj);
__ jcc(Assembler::notZero, update);
__ stop("unexpected null obj");
#endif
}
__ bind(update);
if (do_update) {
#ifdef ASSERT
if (exact_klass != nullptr) {
Label ok;
__ load_klass(tmp, obj, tmp_load_klass);
__ push(tmp);
__ mov_metadata(tmp, exact_klass->constant_encoding());
__ cmpptr(tmp, Address(rsp, 0));
__ jcc(Assembler::equal, ok);
__ stop("exact klass and actual klass differ");
__ bind(ok);
__ pop(tmp);
}
#endif
if (!no_conflict) {
if (exact_klass == nullptr || TypeEntries::is_type_none(current_klass)) {
if (exact_klass != nullptr) {
__ mov_metadata(tmp, exact_klass->constant_encoding());
} else {
__ load_klass(tmp, obj, tmp_load_klass);
}
__ mov(rscratch1, tmp); // save original value before XOR
__ xorptr(tmp, mdo_addr);
__ testptr(tmp, TypeEntries::type_klass_mask);
// klass seen before, nothing to do. The unknown bit may have been
// set already but no need to check.
__ jccb(Assembler::zero, next);
__ testptr(tmp, TypeEntries::type_unknown);
__ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
if (TypeEntries::is_type_none(current_klass)) {
__ testptr(mdo_addr, TypeEntries::type_mask);
__ jccb(Assembler::zero, none);
// There is a chance that the checks above (re-reading profiling
// data from memory) fail if another thread has just set the
// profiling to this obj's klass
__ mov(tmp, rscratch1); // get back original value before XOR
__ xorptr(tmp, mdo_addr);
__ testptr(tmp, TypeEntries::type_klass_mask);
__ jccb(Assembler::zero, next);
}
} else {
assert(ciTypeEntries::valid_ciklass(current_klass) != nullptr &&
ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only");
__ testptr(mdo_addr, TypeEntries::type_unknown);
__ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
}
// different than before. Cannot keep accurate profile.
__ orptr(mdo_addr, TypeEntries::type_unknown);
if (TypeEntries::is_type_none(current_klass)) {
__ jmpb(next);
__ bind(none);
// first time here. Set profile type.
__ movptr(mdo_addr, tmp);
#ifdef ASSERT
__ andptr(tmp, TypeEntries::type_klass_mask);
__ verify_klass_ptr(tmp);
#endif
}
} else {
// There's a single possible klass at this profile point
assert(exact_klass != nullptr, "should be");
if (TypeEntries::is_type_none(current_klass)) {
__ mov_metadata(tmp, exact_klass->constant_encoding());
__ xorptr(tmp, mdo_addr);
__ testptr(tmp, TypeEntries::type_klass_mask);
#ifdef ASSERT
__ jcc(Assembler::zero, next);
{
Label ok;
__ push(tmp);
__ testptr(mdo_addr, TypeEntries::type_mask);
__ jcc(Assembler::zero, ok);
// may have been set by another thread
__ mov_metadata(tmp, exact_klass->constant_encoding());
__ xorptr(tmp, mdo_addr);
__ testptr(tmp, TypeEntries::type_mask);
__ jcc(Assembler::zero, ok);
__ stop("unexpected profiling mismatch");
__ bind(ok);
__ pop(tmp);
}
#else
__ jccb(Assembler::zero, next);
#endif
// first time here. Set profile type.
__ movptr(mdo_addr, tmp);
#ifdef ASSERT
__ andptr(tmp, TypeEntries::type_klass_mask);
__ verify_klass_ptr(tmp);
#endif
} else {
assert(ciTypeEntries::valid_ciklass(current_klass) != nullptr &&
ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent");
__ testptr(mdo_addr, TypeEntries::type_unknown);
__ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
__ orptr(mdo_addr, TypeEntries::type_unknown);
}
}
}
__ bind(next);
}
void LIR_Assembler::emit_delay(LIR_OpDelay*) {
Unimplemented();
}
void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
__ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
}
void LIR_Assembler::align_backward_branch_target() {
__ align(BytesPerWord);
}
void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest, LIR_Opr tmp) {
if (left->is_single_cpu()) {
__ negl(left->as_register());
move_regs(left->as_register(), dest->as_register());
} else if (left->is_double_cpu()) {
Register lo = left->as_register_lo();
Register dst = dest->as_register_lo();
__ movptr(dst, lo);
__ negptr(dst);
} else if (dest->is_single_xmm()) {
assert(!tmp->is_valid(), "do not need temporary");
if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
__ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
}
__ xorps(dest->as_xmm_float_reg(),
ExternalAddress((address)float_signflip_pool),
rscratch1);
} else if (dest->is_double_xmm()) {
assert(!tmp->is_valid(), "do not need temporary");
if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
__ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
}
__ xorpd(dest->as_xmm_double_reg(),
ExternalAddress((address)double_signflip_pool),
rscratch1);
} else {
ShouldNotReachHere();
}
}
void LIR_Assembler::leal(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
assert(src->is_address(), "must be an address");
assert(dest->is_register(), "must be a register");
PatchingStub* patch = nullptr;
if (patch_code != lir_patch_none) {
patch = new PatchingStub(_masm, PatchingStub::access_field_id);
}
Register reg = dest->as_pointer_register();
LIR_Address* addr = src->as_address_ptr();
__ lea(reg, as_Address(addr));
if (patch != nullptr) {
patching_epilog(patch, patch_code, addr->base()->as_register(), info);
}
}
void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
assert(!tmp->is_valid(), "don't need temporary");
__ call(RuntimeAddress(dest));
if (info != nullptr) {
add_call_info_here(info);
}
__ post_call_nop();
}
void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
assert(type == T_LONG, "only for volatile long fields");
if (info != nullptr) {
add_debug_info_for_null_check_here(info);
}
if (src->is_double_xmm()) {
if (dest->is_double_cpu()) {
__ movdq(dest->as_register_lo(), src->as_xmm_double_reg());
} else if (dest->is_double_stack()) {
__ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg());
} else if (dest->is_address()) {
__ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg());
} else {
ShouldNotReachHere();
}
} else if (dest->is_double_xmm()) {
if (src->is_double_stack()) {
__ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix()));
} else if (src->is_address()) {
__ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr()));
} else {
ShouldNotReachHere();
}
} else {
ShouldNotReachHere();
}
}
#ifdef ASSERT
// emit run-time assertion
void LIR_Assembler::emit_assert(LIR_OpAssert* op) {
assert(op->code() == lir_assert, "must be");
if (op->in_opr1()->is_valid()) {
assert(op->in_opr2()->is_valid(), "both operands must be valid");
comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
} else {
assert(op->in_opr2()->is_illegal(), "both operands must be illegal");
assert(op->condition() == lir_cond_always, "no other conditions allowed");
}
Label ok;
if (op->condition() != lir_cond_always) {
Assembler::Condition acond = Assembler::zero;
switch (op->condition()) {
case lir_cond_equal: acond = Assembler::equal; break;
case lir_cond_notEqual: acond = Assembler::notEqual; break;
case lir_cond_less: acond = Assembler::less; break;
case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
case lir_cond_greater: acond = Assembler::greater; break;
case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
default: ShouldNotReachHere();
}
__ jcc(acond, ok);
}
if (op->halt()) {
const char* str = __ code_string(op->msg());
__ stop(str);
} else {
breakpoint();
}
__ bind(ok);
}
#endif
void LIR_Assembler::membar() {
// QQQ sparc TSO uses this,
__ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad));
}
void LIR_Assembler::membar_acquire() {
// No x86 machines currently require load fences
}
void LIR_Assembler::membar_release() {
// No x86 machines currently require store fences
}
void LIR_Assembler::membar_loadload() {
// no-op
//__ membar(Assembler::Membar_mask_bits(Assembler::loadload));
}
void LIR_Assembler::membar_storestore() {
// no-op
//__ membar(Assembler::Membar_mask_bits(Assembler::storestore));
}
void LIR_Assembler::membar_loadstore() {
// no-op
//__ membar(Assembler::Membar_mask_bits(Assembler::loadstore));
}
void LIR_Assembler::membar_storeload() {
__ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
}
void LIR_Assembler::on_spin_wait() {
__ pause ();
}
void LIR_Assembler::get_thread(LIR_Opr result_reg) {
assert(result_reg->is_register(), "check");
__ mov(result_reg->as_register(), r15_thread);
}
void LIR_Assembler::peephole(LIR_List*) {
// do nothing for now
}
void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) {
assert(data == dest, "xchg/xadd uses only 2 operands");
if (data->type() == T_INT) {
if (code == lir_xadd) {
__ lock();
__ xaddl(as_Address(src->as_address_ptr()), data->as_register());
} else {
__ xchgl(data->as_register(), as_Address(src->as_address_ptr()));
}
} else if (data->is_oop()) {
assert (code == lir_xchg, "xadd for oops");
Register obj = data->as_register();
if (UseCompressedOops) {
__ encode_heap_oop(obj);
__ xchgl(obj, as_Address(src->as_address_ptr()));
__ decode_heap_oop(obj);
} else {
__ xchgptr(obj, as_Address(src->as_address_ptr()));
}
} else if (data->type() == T_LONG) {
assert(data->as_register_lo() == data->as_register_hi(), "should be a single register");
if (code == lir_xadd) {
__ lock();
__ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo());
} else {
__ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr()));
}
} else {
ShouldNotReachHere();
}
}
#undef __