Mercurial > hg > truffle
view src/cpu/x86/vm/templateTable_x86_32.cpp @ 9392:5a74cbafe5b9
Adjustment to the megamorphic inlining strategy such that it focuses on concrete methods.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Sun, 28 Apr 2013 19:17:56 +0200 |
parents | db9981fd3124 |
children | aeaca88565e6 |
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/* * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "asm/macroAssembler.hpp" #include "interpreter/interpreter.hpp" #include "interpreter/interpreterRuntime.hpp" #include "interpreter/templateTable.hpp" #include "memory/universe.inline.hpp" #include "oops/methodData.hpp" #include "oops/objArrayKlass.hpp" #include "oops/oop.inline.hpp" #include "prims/methodHandles.hpp" #include "runtime/sharedRuntime.hpp" #include "runtime/stubRoutines.hpp" #include "runtime/synchronizer.hpp" #include "utilities/macros.hpp" #ifndef CC_INTERP #define __ _masm-> //---------------------------------------------------------------------------------------------------- // Platform-dependent initialization void TemplateTable::pd_initialize() { // No i486 specific initialization } //---------------------------------------------------------------------------------------------------- // Address computation // local variables static inline Address iaddress(int n) { return Address(rdi, Interpreter::local_offset_in_bytes(n)); } static inline Address laddress(int n) { return iaddress(n + 1); } static inline Address haddress(int n) { return iaddress(n + 0); } static inline Address faddress(int n) { return iaddress(n); } static inline Address daddress(int n) { return laddress(n); } static inline Address aaddress(int n) { return iaddress(n); } static inline Address iaddress(Register r) { return Address(rdi, r, Interpreter::stackElementScale()); } static inline Address laddress(Register r) { return Address(rdi, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(1)); } static inline Address haddress(Register r) { return Address(rdi, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0)); } static inline Address faddress(Register r) { return iaddress(r); } static inline Address daddress(Register r) { return laddress(r); } static inline Address aaddress(Register r) { return iaddress(r); } // expression stack // (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store // data beyond the rsp which is potentially unsafe in an MT environment; // an interrupt may overwrite that data.) static inline Address at_rsp () { return Address(rsp, 0); } // At top of Java expression stack which may be different than rsp(). It // isn't for category 1 objects. static inline Address at_tos () { Address tos = Address(rsp, Interpreter::expr_offset_in_bytes(0)); return tos; } static inline Address at_tos_p1() { return Address(rsp, Interpreter::expr_offset_in_bytes(1)); } static inline Address at_tos_p2() { return Address(rsp, Interpreter::expr_offset_in_bytes(2)); } // Condition conversion static Assembler::Condition j_not(TemplateTable::Condition cc) { switch (cc) { case TemplateTable::equal : return Assembler::notEqual; case TemplateTable::not_equal : return Assembler::equal; case TemplateTable::less : return Assembler::greaterEqual; case TemplateTable::less_equal : return Assembler::greater; case TemplateTable::greater : return Assembler::lessEqual; case TemplateTable::greater_equal: return Assembler::less; } ShouldNotReachHere(); return Assembler::zero; } //---------------------------------------------------------------------------------------------------- // Miscelaneous helper routines // Store an oop (or NULL) at the address described by obj. // If val == noreg this means store a NULL static void do_oop_store(InterpreterMacroAssembler* _masm, Address obj, Register val, BarrierSet::Name barrier, bool precise) { assert(val == noreg || val == rax, "parameter is just for looks"); switch (barrier) { #if INCLUDE_ALL_GCS case BarrierSet::G1SATBCT: case BarrierSet::G1SATBCTLogging: { // flatten object address if needed // We do it regardless of precise because we need the registers if (obj.index() == noreg && obj.disp() == 0) { if (obj.base() != rdx) { __ movl(rdx, obj.base()); } } else { __ leal(rdx, obj); } __ get_thread(rcx); __ save_bcp(); __ g1_write_barrier_pre(rdx /* obj */, rbx /* pre_val */, rcx /* thread */, rsi /* tmp */, val != noreg /* tosca_live */, false /* expand_call */); // Do the actual store // noreg means NULL if (val == noreg) { __ movptr(Address(rdx, 0), NULL_WORD); // No post barrier for NULL } else { __ movl(Address(rdx, 0), val); __ g1_write_barrier_post(rdx /* store_adr */, val /* new_val */, rcx /* thread */, rbx /* tmp */, rsi /* tmp2 */); } __ restore_bcp(); } break; #endif // INCLUDE_ALL_GCS case BarrierSet::CardTableModRef: case BarrierSet::CardTableExtension: { if (val == noreg) { __ movptr(obj, NULL_WORD); } else { __ movl(obj, val); // flatten object address if needed if (!precise || (obj.index() == noreg && obj.disp() == 0)) { __ store_check(obj.base()); } else { __ leal(rdx, obj); __ store_check(rdx); } } } break; case BarrierSet::ModRef: case BarrierSet::Other: if (val == noreg) { __ movptr(obj, NULL_WORD); } else { __ movl(obj, val); } break; default : ShouldNotReachHere(); } } Address TemplateTable::at_bcp(int offset) { assert(_desc->uses_bcp(), "inconsistent uses_bcp information"); return Address(rsi, offset); } void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg, Register temp_reg, bool load_bc_into_bc_reg/*=true*/, int byte_no) { if (!RewriteBytecodes) return; Label L_patch_done; switch (bc) { case Bytecodes::_fast_aputfield: case Bytecodes::_fast_bputfield: case Bytecodes::_fast_cputfield: case Bytecodes::_fast_dputfield: case Bytecodes::_fast_fputfield: case Bytecodes::_fast_iputfield: case Bytecodes::_fast_lputfield: case Bytecodes::_fast_sputfield: { // We skip bytecode quickening for putfield instructions when // the put_code written to the constant pool cache is zero. // This is required so that every execution of this instruction // calls out to InterpreterRuntime::resolve_get_put to do // additional, required work. assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); assert(load_bc_into_bc_reg, "we use bc_reg as temp"); __ get_cache_and_index_and_bytecode_at_bcp(bc_reg, temp_reg, temp_reg, byte_no, 1); __ movl(bc_reg, bc); __ cmpl(temp_reg, (int) 0); __ jcc(Assembler::zero, L_patch_done); // don't patch } break; default: assert(byte_no == -1, "sanity"); // the pair bytecodes have already done the load. if (load_bc_into_bc_reg) { __ movl(bc_reg, bc); } } if (JvmtiExport::can_post_breakpoint()) { Label L_fast_patch; // if a breakpoint is present we can't rewrite the stream directly __ movzbl(temp_reg, at_bcp(0)); __ cmpl(temp_reg, Bytecodes::_breakpoint); __ jcc(Assembler::notEqual, L_fast_patch); __ get_method(temp_reg); // Let breakpoint table handling rewrite to quicker bytecode __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rsi, bc_reg); #ifndef ASSERT __ jmpb(L_patch_done); #else __ jmp(L_patch_done); #endif __ bind(L_fast_patch); } #ifdef ASSERT Label L_okay; __ load_unsigned_byte(temp_reg, at_bcp(0)); __ cmpl(temp_reg, (int)Bytecodes::java_code(bc)); __ jccb(Assembler::equal, L_okay); __ cmpl(temp_reg, bc_reg); __ jcc(Assembler::equal, L_okay); __ stop("patching the wrong bytecode"); __ bind(L_okay); #endif // patch bytecode __ movb(at_bcp(0), bc_reg); __ bind(L_patch_done); } //---------------------------------------------------------------------------------------------------- // Individual instructions void TemplateTable::nop() { transition(vtos, vtos); // nothing to do } void TemplateTable::shouldnotreachhere() { transition(vtos, vtos); __ stop("shouldnotreachhere bytecode"); } void TemplateTable::aconst_null() { transition(vtos, atos); __ xorptr(rax, rax); } void TemplateTable::iconst(int value) { transition(vtos, itos); if (value == 0) { __ xorptr(rax, rax); } else { __ movptr(rax, value); } } void TemplateTable::lconst(int value) { transition(vtos, ltos); if (value == 0) { __ xorptr(rax, rax); } else { __ movptr(rax, value); } assert(value >= 0, "check this code"); __ xorptr(rdx, rdx); } void TemplateTable::fconst(int value) { transition(vtos, ftos); if (value == 0) { __ fldz(); } else if (value == 1) { __ fld1(); } else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here } else { ShouldNotReachHere(); } } void TemplateTable::dconst(int value) { transition(vtos, dtos); if (value == 0) { __ fldz(); } else if (value == 1) { __ fld1(); } else { ShouldNotReachHere(); } } void TemplateTable::bipush() { transition(vtos, itos); __ load_signed_byte(rax, at_bcp(1)); } void TemplateTable::sipush() { transition(vtos, itos); __ load_unsigned_short(rax, at_bcp(1)); __ bswapl(rax); __ sarl(rax, 16); } void TemplateTable::ldc(bool wide) { transition(vtos, vtos); Label call_ldc, notFloat, notClass, Done; if (wide) { __ get_unsigned_2_byte_index_at_bcp(rbx, 1); } else { __ load_unsigned_byte(rbx, at_bcp(1)); } __ get_cpool_and_tags(rcx, rax); const int base_offset = ConstantPool::header_size() * wordSize; const int tags_offset = Array<u1>::base_offset_in_bytes(); // get type __ xorptr(rdx, rdx); __ movb(rdx, Address(rax, rbx, Address::times_1, tags_offset)); // unresolved class - get the resolved class __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass); __ jccb(Assembler::equal, call_ldc); // unresolved class in error (resolution failed) - call into runtime // so that the same error from first resolution attempt is thrown. __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError); __ jccb(Assembler::equal, call_ldc); // resolved class - need to call vm to get java mirror of the class __ cmpl(rdx, JVM_CONSTANT_Class); __ jcc(Assembler::notEqual, notClass); __ bind(call_ldc); __ movl(rcx, wide); call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rcx); __ push(atos); __ jmp(Done); __ bind(notClass); __ cmpl(rdx, JVM_CONSTANT_Float); __ jccb(Assembler::notEqual, notFloat); // ftos __ fld_s( Address(rcx, rbx, Address::times_ptr, base_offset)); __ push(ftos); __ jmp(Done); __ bind(notFloat); #ifdef ASSERT { Label L; __ cmpl(rdx, JVM_CONSTANT_Integer); __ jcc(Assembler::equal, L); // String and Object are rewritten to fast_aldc __ stop("unexpected tag type in ldc"); __ bind(L); } #endif // itos JVM_CONSTANT_Integer only __ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset)); __ push(itos); __ bind(Done); } // Fast path for caching oop constants. void TemplateTable::fast_aldc(bool wide) { transition(vtos, atos); Register result = rax; Register tmp = rdx; int index_size = wide ? sizeof(u2) : sizeof(u1); Label resolved; // We are resolved if the resolved reference cache entry contains a // non-null object (String, MethodType, etc.) assert_different_registers(result, tmp); __ get_cache_index_at_bcp(tmp, 1, index_size); __ load_resolved_reference_at_index(result, tmp); __ testl(result, result); __ jcc(Assembler::notZero, resolved); address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc); // first time invocation - must resolve first __ movl(tmp, (int)bytecode()); __ call_VM(result, entry, tmp); __ bind(resolved); if (VerifyOops) { __ verify_oop(result); } } void TemplateTable::ldc2_w() { transition(vtos, vtos); Label Long, Done; __ get_unsigned_2_byte_index_at_bcp(rbx, 1); __ get_cpool_and_tags(rcx, rax); const int base_offset = ConstantPool::header_size() * wordSize; const int tags_offset = Array<u1>::base_offset_in_bytes(); // get type __ cmpb(Address(rax, rbx, Address::times_1, tags_offset), JVM_CONSTANT_Double); __ jccb(Assembler::notEqual, Long); // dtos __ fld_d( Address(rcx, rbx, Address::times_ptr, base_offset)); __ push(dtos); __ jmpb(Done); __ bind(Long); // ltos __ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize)); NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize))); __ push(ltos); __ bind(Done); } void TemplateTable::locals_index(Register reg, int offset) { __ load_unsigned_byte(reg, at_bcp(offset)); __ negptr(reg); } void TemplateTable::iload() { transition(vtos, itos); if (RewriteFrequentPairs) { Label rewrite, done; // get next byte __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_iload))); // if _iload, wait to rewrite to iload2. We only want to rewrite the // last two iloads in a pair. Comparing against fast_iload means that // the next bytecode is neither an iload or a caload, and therefore // an iload pair. __ cmpl(rbx, Bytecodes::_iload); __ jcc(Assembler::equal, done); __ cmpl(rbx, Bytecodes::_fast_iload); __ movl(rcx, Bytecodes::_fast_iload2); __ jccb(Assembler::equal, rewrite); // if _caload, rewrite to fast_icaload __ cmpl(rbx, Bytecodes::_caload); __ movl(rcx, Bytecodes::_fast_icaload); __ jccb(Assembler::equal, rewrite); // rewrite so iload doesn't check again. __ movl(rcx, Bytecodes::_fast_iload); // rewrite // rcx: fast bytecode __ bind(rewrite); patch_bytecode(Bytecodes::_iload, rcx, rbx, false); __ bind(done); } // Get the local value into tos locals_index(rbx); __ movl(rax, iaddress(rbx)); } void TemplateTable::fast_iload2() { transition(vtos, itos); locals_index(rbx); __ movl(rax, iaddress(rbx)); __ push(itos); locals_index(rbx, 3); __ movl(rax, iaddress(rbx)); } void TemplateTable::fast_iload() { transition(vtos, itos); locals_index(rbx); __ movl(rax, iaddress(rbx)); } void TemplateTable::lload() { transition(vtos, ltos); locals_index(rbx); __ movptr(rax, laddress(rbx)); NOT_LP64(__ movl(rdx, haddress(rbx))); } void TemplateTable::fload() { transition(vtos, ftos); locals_index(rbx); __ fld_s(faddress(rbx)); } void TemplateTable::dload() { transition(vtos, dtos); locals_index(rbx); __ fld_d(daddress(rbx)); } void TemplateTable::aload() { transition(vtos, atos); locals_index(rbx); __ movptr(rax, aaddress(rbx)); } void TemplateTable::locals_index_wide(Register reg) { __ movl(reg, at_bcp(2)); __ bswapl(reg); __ shrl(reg, 16); __ negptr(reg); } void TemplateTable::wide_iload() { transition(vtos, itos); locals_index_wide(rbx); __ movl(rax, iaddress(rbx)); } void TemplateTable::wide_lload() { transition(vtos, ltos); locals_index_wide(rbx); __ movptr(rax, laddress(rbx)); NOT_LP64(__ movl(rdx, haddress(rbx))); } void TemplateTable::wide_fload() { transition(vtos, ftos); locals_index_wide(rbx); __ fld_s(faddress(rbx)); } void TemplateTable::wide_dload() { transition(vtos, dtos); locals_index_wide(rbx); __ fld_d(daddress(rbx)); } void TemplateTable::wide_aload() { transition(vtos, atos); locals_index_wide(rbx); __ movptr(rax, aaddress(rbx)); } void TemplateTable::index_check(Register array, Register index) { // Pop ptr into array __ pop_ptr(array); index_check_without_pop(array, index); } void TemplateTable::index_check_without_pop(Register array, Register index) { // destroys rbx, // check array __ null_check(array, arrayOopDesc::length_offset_in_bytes()); LP64_ONLY(__ movslq(index, index)); // check index __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes())); if (index != rbx) { // ??? convention: move aberrant index into rbx, for exception message assert(rbx != array, "different registers"); __ mov(rbx, index); } __ jump_cc(Assembler::aboveEqual, ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry)); } void TemplateTable::iaload() { transition(itos, itos); // rdx: array index_check(rdx, rax); // kills rbx, // rax,: index __ movl(rax, Address(rdx, rax, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_INT))); } void TemplateTable::laload() { transition(itos, ltos); // rax,: index // rdx: array index_check(rdx, rax); __ mov(rbx, rax); // rbx,: index __ movptr(rax, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize)); NOT_LP64(__ movl(rdx, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize))); } void TemplateTable::faload() { transition(itos, ftos); // rdx: array index_check(rdx, rax); // kills rbx, // rax,: index __ fld_s(Address(rdx, rax, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_FLOAT))); } void TemplateTable::daload() { transition(itos, dtos); // rdx: array index_check(rdx, rax); // kills rbx, // rax,: index __ fld_d(Address(rdx, rax, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_DOUBLE))); } void TemplateTable::aaload() { transition(itos, atos); // rdx: array index_check(rdx, rax); // kills rbx, // rax,: index __ movptr(rax, Address(rdx, rax, Address::times_ptr, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); } void TemplateTable::baload() { transition(itos, itos); // rdx: array index_check(rdx, rax); // kills rbx, // rax,: index // can do better code for P5 - fix this at some point __ load_signed_byte(rbx, Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE))); __ mov(rax, rbx); } void TemplateTable::caload() { transition(itos, itos); // rdx: array index_check(rdx, rax); // kills rbx, // rax,: index // can do better code for P5 - may want to improve this at some point __ load_unsigned_short(rbx, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); __ mov(rax, rbx); } // iload followed by caload frequent pair void TemplateTable::fast_icaload() { transition(vtos, itos); // load index out of locals locals_index(rbx); __ movl(rax, iaddress(rbx)); // rdx: array index_check(rdx, rax); // rax,: index __ load_unsigned_short(rbx, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); __ mov(rax, rbx); } void TemplateTable::saload() { transition(itos, itos); // rdx: array index_check(rdx, rax); // kills rbx, // rax,: index // can do better code for P5 - may want to improve this at some point __ load_signed_short(rbx, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT))); __ mov(rax, rbx); } void TemplateTable::iload(int n) { transition(vtos, itos); __ movl(rax, iaddress(n)); } void TemplateTable::lload(int n) { transition(vtos, ltos); __ movptr(rax, laddress(n)); NOT_LP64(__ movptr(rdx, haddress(n))); } void TemplateTable::fload(int n) { transition(vtos, ftos); __ fld_s(faddress(n)); } void TemplateTable::dload(int n) { transition(vtos, dtos); __ fld_d(daddress(n)); } void TemplateTable::aload(int n) { transition(vtos, atos); __ movptr(rax, aaddress(n)); } void TemplateTable::aload_0() { transition(vtos, atos); // According to bytecode histograms, the pairs: // // _aload_0, _fast_igetfield // _aload_0, _fast_agetfield // _aload_0, _fast_fgetfield // // occur frequently. If RewriteFrequentPairs is set, the (slow) _aload_0 // bytecode checks if the next bytecode is either _fast_igetfield, // _fast_agetfield or _fast_fgetfield and then rewrites the // current bytecode into a pair bytecode; otherwise it rewrites the current // bytecode into _fast_aload_0 that doesn't do the pair check anymore. // // Note: If the next bytecode is _getfield, the rewrite must be delayed, // otherwise we may miss an opportunity for a pair. // // Also rewrite frequent pairs // aload_0, aload_1 // aload_0, iload_1 // These bytecodes with a small amount of code are most profitable to rewrite if (RewriteFrequentPairs) { Label rewrite, done; // get next byte __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0))); // do actual aload_0 aload(0); // if _getfield then wait with rewrite __ cmpl(rbx, Bytecodes::_getfield); __ jcc(Assembler::equal, done); // if _igetfield then reqrite to _fast_iaccess_0 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); __ cmpl(rbx, Bytecodes::_fast_igetfield); __ movl(rcx, Bytecodes::_fast_iaccess_0); __ jccb(Assembler::equal, rewrite); // if _agetfield then reqrite to _fast_aaccess_0 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); __ cmpl(rbx, Bytecodes::_fast_agetfield); __ movl(rcx, Bytecodes::_fast_aaccess_0); __ jccb(Assembler::equal, rewrite); // if _fgetfield then reqrite to _fast_faccess_0 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition"); __ cmpl(rbx, Bytecodes::_fast_fgetfield); __ movl(rcx, Bytecodes::_fast_faccess_0); __ jccb(Assembler::equal, rewrite); // else rewrite to _fast_aload0 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition"); __ movl(rcx, Bytecodes::_fast_aload_0); // rewrite // rcx: fast bytecode __ bind(rewrite); patch_bytecode(Bytecodes::_aload_0, rcx, rbx, false); __ bind(done); } else { aload(0); } } void TemplateTable::istore() { transition(itos, vtos); locals_index(rbx); __ movl(iaddress(rbx), rax); } void TemplateTable::lstore() { transition(ltos, vtos); locals_index(rbx); __ movptr(laddress(rbx), rax); NOT_LP64(__ movptr(haddress(rbx), rdx)); } void TemplateTable::fstore() { transition(ftos, vtos); locals_index(rbx); __ fstp_s(faddress(rbx)); } void TemplateTable::dstore() { transition(dtos, vtos); locals_index(rbx); __ fstp_d(daddress(rbx)); } void TemplateTable::astore() { transition(vtos, vtos); __ pop_ptr(rax); locals_index(rbx); __ movptr(aaddress(rbx), rax); } void TemplateTable::wide_istore() { transition(vtos, vtos); __ pop_i(rax); locals_index_wide(rbx); __ movl(iaddress(rbx), rax); } void TemplateTable::wide_lstore() { transition(vtos, vtos); __ pop_l(rax, rdx); locals_index_wide(rbx); __ movptr(laddress(rbx), rax); NOT_LP64(__ movl(haddress(rbx), rdx)); } void TemplateTable::wide_fstore() { wide_istore(); } void TemplateTable::wide_dstore() { wide_lstore(); } void TemplateTable::wide_astore() { transition(vtos, vtos); __ pop_ptr(rax); locals_index_wide(rbx); __ movptr(aaddress(rbx), rax); } void TemplateTable::iastore() { transition(itos, vtos); __ pop_i(rbx); // rax,: value // rdx: array index_check(rdx, rbx); // prefer index in rbx, // rbx,: index __ movl(Address(rdx, rbx, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_INT)), rax); } void TemplateTable::lastore() { transition(ltos, vtos); __ pop_i(rbx); // rax,: low(value) // rcx: array // rdx: high(value) index_check(rcx, rbx); // prefer index in rbx, // rbx,: index __ movptr(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize), rax); NOT_LP64(__ movl(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize), rdx)); } void TemplateTable::fastore() { transition(ftos, vtos); __ pop_i(rbx); // rdx: array // st0: value index_check(rdx, rbx); // prefer index in rbx, // rbx,: index __ fstp_s(Address(rdx, rbx, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_FLOAT))); } void TemplateTable::dastore() { transition(dtos, vtos); __ pop_i(rbx); // rdx: array // st0: value index_check(rdx, rbx); // prefer index in rbx, // rbx,: index __ fstp_d(Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_DOUBLE))); } void TemplateTable::aastore() { Label is_null, ok_is_subtype, done; transition(vtos, vtos); // stack: ..., array, index, value __ movptr(rax, at_tos()); // Value __ movl(rcx, at_tos_p1()); // Index __ movptr(rdx, at_tos_p2()); // Array Address element_address(rdx, rcx, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_OBJECT)); index_check_without_pop(rdx, rcx); // kills rbx, // do array store check - check for NULL value first __ testptr(rax, rax); __ jcc(Assembler::zero, is_null); // Move subklass into EBX __ load_klass(rbx, rax); // Move superklass into EAX __ load_klass(rax, rdx); __ movptr(rax, Address(rax, ObjArrayKlass::element_klass_offset())); // Compress array+index*wordSize+12 into a single register. Frees ECX. __ lea(rdx, element_address); // Generate subtype check. Blows ECX. Resets EDI to locals. // Superklass in EAX. Subklass in EBX. __ gen_subtype_check( rbx, ok_is_subtype ); // Come here on failure // object is at TOS __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry)); // Come here on success __ bind(ok_is_subtype); // Get the value to store __ movptr(rax, at_rsp()); // and store it with appropriate barrier do_oop_store(_masm, Address(rdx, 0), rax, _bs->kind(), true); __ jmp(done); // Have a NULL in EAX, EDX=array, ECX=index. Store NULL at ary[idx] __ bind(is_null); __ profile_null_seen(rbx); // Store NULL, (noreg means NULL to do_oop_store) do_oop_store(_masm, element_address, noreg, _bs->kind(), true); // Pop stack arguments __ bind(done); __ addptr(rsp, 3 * Interpreter::stackElementSize); } void TemplateTable::bastore() { transition(itos, vtos); __ pop_i(rbx); // rax,: value // rdx: array index_check(rdx, rbx); // prefer index in rbx, // rbx,: index __ movb(Address(rdx, rbx, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE)), rax); } void TemplateTable::castore() { transition(itos, vtos); __ pop_i(rbx); // rax,: value // rdx: array index_check(rdx, rbx); // prefer index in rbx, // rbx,: index __ movw(Address(rdx, rbx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)), rax); } void TemplateTable::sastore() { castore(); } void TemplateTable::istore(int n) { transition(itos, vtos); __ movl(iaddress(n), rax); } void TemplateTable::lstore(int n) { transition(ltos, vtos); __ movptr(laddress(n), rax); NOT_LP64(__ movptr(haddress(n), rdx)); } void TemplateTable::fstore(int n) { transition(ftos, vtos); __ fstp_s(faddress(n)); } void TemplateTable::dstore(int n) { transition(dtos, vtos); __ fstp_d(daddress(n)); } void TemplateTable::astore(int n) { transition(vtos, vtos); __ pop_ptr(rax); __ movptr(aaddress(n), rax); } void TemplateTable::pop() { transition(vtos, vtos); __ addptr(rsp, Interpreter::stackElementSize); } void TemplateTable::pop2() { transition(vtos, vtos); __ addptr(rsp, 2*Interpreter::stackElementSize); } void TemplateTable::dup() { transition(vtos, vtos); // stack: ..., a __ load_ptr(0, rax); __ push_ptr(rax); // stack: ..., a, a } void TemplateTable::dup_x1() { transition(vtos, vtos); // stack: ..., a, b __ load_ptr( 0, rax); // load b __ load_ptr( 1, rcx); // load a __ store_ptr(1, rax); // store b __ store_ptr(0, rcx); // store a __ push_ptr(rax); // push b // stack: ..., b, a, b } void TemplateTable::dup_x2() { transition(vtos, vtos); // stack: ..., a, b, c __ load_ptr( 0, rax); // load c __ load_ptr( 2, rcx); // load a __ store_ptr(2, rax); // store c in a __ push_ptr(rax); // push c // stack: ..., c, b, c, c __ load_ptr( 2, rax); // load b __ store_ptr(2, rcx); // store a in b // stack: ..., c, a, c, c __ store_ptr(1, rax); // store b in c // stack: ..., c, a, b, c } void TemplateTable::dup2() { transition(vtos, vtos); // stack: ..., a, b __ load_ptr(1, rax); // load a __ push_ptr(rax); // push a __ load_ptr(1, rax); // load b __ push_ptr(rax); // push b // stack: ..., a, b, a, b } void TemplateTable::dup2_x1() { transition(vtos, vtos); // stack: ..., a, b, c __ load_ptr( 0, rcx); // load c __ load_ptr( 1, rax); // load b __ push_ptr(rax); // push b __ push_ptr(rcx); // push c // stack: ..., a, b, c, b, c __ store_ptr(3, rcx); // store c in b // stack: ..., a, c, c, b, c __ load_ptr( 4, rcx); // load a __ store_ptr(2, rcx); // store a in 2nd c // stack: ..., a, c, a, b, c __ store_ptr(4, rax); // store b in a // stack: ..., b, c, a, b, c // stack: ..., b, c, a, b, c } void TemplateTable::dup2_x2() { transition(vtos, vtos); // stack: ..., a, b, c, d __ load_ptr( 0, rcx); // load d __ load_ptr( 1, rax); // load c __ push_ptr(rax); // push c __ push_ptr(rcx); // push d // stack: ..., a, b, c, d, c, d __ load_ptr( 4, rax); // load b __ store_ptr(2, rax); // store b in d __ store_ptr(4, rcx); // store d in b // stack: ..., a, d, c, b, c, d __ load_ptr( 5, rcx); // load a __ load_ptr( 3, rax); // load c __ store_ptr(3, rcx); // store a in c __ store_ptr(5, rax); // store c in a // stack: ..., c, d, a, b, c, d // stack: ..., c, d, a, b, c, d } void TemplateTable::swap() { transition(vtos, vtos); // stack: ..., a, b __ load_ptr( 1, rcx); // load a __ load_ptr( 0, rax); // load b __ store_ptr(0, rcx); // store a in b __ store_ptr(1, rax); // store b in a // stack: ..., b, a } void TemplateTable::iop2(Operation op) { transition(itos, itos); switch (op) { case add : __ pop_i(rdx); __ addl (rax, rdx); break; case sub : __ mov(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break; case mul : __ pop_i(rdx); __ imull(rax, rdx); break; case _and : __ pop_i(rdx); __ andl (rax, rdx); break; case _or : __ pop_i(rdx); __ orl (rax, rdx); break; case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break; case shl : __ mov(rcx, rax); __ pop_i(rax); __ shll (rax); break; // implicit masking of lower 5 bits by Intel shift instr. case shr : __ mov(rcx, rax); __ pop_i(rax); __ sarl (rax); break; // implicit masking of lower 5 bits by Intel shift instr. case ushr : __ mov(rcx, rax); __ pop_i(rax); __ shrl (rax); break; // implicit masking of lower 5 bits by Intel shift instr. default : ShouldNotReachHere(); } } void TemplateTable::lop2(Operation op) { transition(ltos, ltos); __ pop_l(rbx, rcx); switch (op) { case add : __ addl(rax, rbx); __ adcl(rdx, rcx); break; case sub : __ subl(rbx, rax); __ sbbl(rcx, rdx); __ mov (rax, rbx); __ mov (rdx, rcx); break; case _and : __ andl(rax, rbx); __ andl(rdx, rcx); break; case _or : __ orl (rax, rbx); __ orl (rdx, rcx); break; case _xor : __ xorl(rax, rbx); __ xorl(rdx, rcx); break; default : ShouldNotReachHere(); } } void TemplateTable::idiv() { transition(itos, itos); __ mov(rcx, rax); __ pop_i(rax); // Note: could xor rax, and rcx and compare with (-1 ^ min_int). If // they are not equal, one could do a normal division (no correction // needed), which may speed up this implementation for the common case. // (see also JVM spec., p.243 & p.271) __ corrected_idivl(rcx); } void TemplateTable::irem() { transition(itos, itos); __ mov(rcx, rax); __ pop_i(rax); // Note: could xor rax, and rcx and compare with (-1 ^ min_int). If // they are not equal, one could do a normal division (no correction // needed), which may speed up this implementation for the common case. // (see also JVM spec., p.243 & p.271) __ corrected_idivl(rcx); __ mov(rax, rdx); } void TemplateTable::lmul() { transition(ltos, ltos); __ pop_l(rbx, rcx); __ push(rcx); __ push(rbx); __ push(rdx); __ push(rax); __ lmul(2 * wordSize, 0); __ addptr(rsp, 4 * wordSize); // take off temporaries } void TemplateTable::ldiv() { transition(ltos, ltos); __ pop_l(rbx, rcx); __ push(rcx); __ push(rbx); __ push(rdx); __ push(rax); // check if y = 0 __ orl(rax, rdx); __ jump_cc(Assembler::zero, ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv)); __ addptr(rsp, 4 * wordSize); // take off temporaries } void TemplateTable::lrem() { transition(ltos, ltos); __ pop_l(rbx, rcx); __ push(rcx); __ push(rbx); __ push(rdx); __ push(rax); // check if y = 0 __ orl(rax, rdx); __ jump_cc(Assembler::zero, ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem)); __ addptr(rsp, 4 * wordSize); } void TemplateTable::lshl() { transition(itos, ltos); __ movl(rcx, rax); // get shift count __ pop_l(rax, rdx); // get shift value __ lshl(rdx, rax); } void TemplateTable::lshr() { transition(itos, ltos); __ mov(rcx, rax); // get shift count __ pop_l(rax, rdx); // get shift value __ lshr(rdx, rax, true); } void TemplateTable::lushr() { transition(itos, ltos); __ mov(rcx, rax); // get shift count __ pop_l(rax, rdx); // get shift value __ lshr(rdx, rax); } void TemplateTable::fop2(Operation op) { transition(ftos, ftos); switch (op) { case add: __ fadd_s (at_rsp()); break; case sub: __ fsubr_s(at_rsp()); break; case mul: __ fmul_s (at_rsp()); break; case div: __ fdivr_s(at_rsp()); break; case rem: __ fld_s (at_rsp()); __ fremr(rax); break; default : ShouldNotReachHere(); } __ f2ieee(); __ pop(rax); // pop float thing off } void TemplateTable::dop2(Operation op) { transition(dtos, dtos); switch (op) { case add: __ fadd_d (at_rsp()); break; case sub: __ fsubr_d(at_rsp()); break; case mul: { Label L_strict; Label L_join; const Address access_flags (rcx, Method::access_flags_offset()); __ get_method(rcx); __ movl(rcx, access_flags); __ testl(rcx, JVM_ACC_STRICT); __ jccb(Assembler::notZero, L_strict); __ fmul_d (at_rsp()); __ jmpb(L_join); __ bind(L_strict); __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); __ fmulp(); __ fmul_d (at_rsp()); __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); __ fmulp(); __ bind(L_join); break; } case div: { Label L_strict; Label L_join; const Address access_flags (rcx, Method::access_flags_offset()); __ get_method(rcx); __ movl(rcx, access_flags); __ testl(rcx, JVM_ACC_STRICT); __ jccb(Assembler::notZero, L_strict); __ fdivr_d(at_rsp()); __ jmp(L_join); __ bind(L_strict); __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); __ fmul_d (at_rsp()); __ fdivrp(); __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); __ fmulp(); __ bind(L_join); break; } case rem: __ fld_d (at_rsp()); __ fremr(rax); break; default : ShouldNotReachHere(); } __ d2ieee(); // Pop double precision number from rsp. __ pop(rax); __ pop(rdx); } void TemplateTable::ineg() { transition(itos, itos); __ negl(rax); } void TemplateTable::lneg() { transition(ltos, ltos); __ lneg(rdx, rax); } void TemplateTable::fneg() { transition(ftos, ftos); __ fchs(); } void TemplateTable::dneg() { transition(dtos, dtos); __ fchs(); } void TemplateTable::iinc() { transition(vtos, vtos); __ load_signed_byte(rdx, at_bcp(2)); // get constant locals_index(rbx); __ addl(iaddress(rbx), rdx); } void TemplateTable::wide_iinc() { transition(vtos, vtos); __ movl(rdx, at_bcp(4)); // get constant locals_index_wide(rbx); __ bswapl(rdx); // swap bytes & sign-extend constant __ sarl(rdx, 16); __ addl(iaddress(rbx), rdx); // Note: should probably use only one movl to get both // the index and the constant -> fix this } void TemplateTable::convert() { // Checking #ifdef ASSERT { TosState tos_in = ilgl; TosState tos_out = ilgl; switch (bytecode()) { case Bytecodes::_i2l: // fall through case Bytecodes::_i2f: // fall through case Bytecodes::_i2d: // fall through case Bytecodes::_i2b: // fall through case Bytecodes::_i2c: // fall through case Bytecodes::_i2s: tos_in = itos; break; case Bytecodes::_l2i: // fall through case Bytecodes::_l2f: // fall through case Bytecodes::_l2d: tos_in = ltos; break; case Bytecodes::_f2i: // fall through case Bytecodes::_f2l: // fall through case Bytecodes::_f2d: tos_in = ftos; break; case Bytecodes::_d2i: // fall through case Bytecodes::_d2l: // fall through case Bytecodes::_d2f: tos_in = dtos; break; default : ShouldNotReachHere(); } switch (bytecode()) { case Bytecodes::_l2i: // fall through case Bytecodes::_f2i: // fall through case Bytecodes::_d2i: // fall through case Bytecodes::_i2b: // fall through case Bytecodes::_i2c: // fall through case Bytecodes::_i2s: tos_out = itos; break; case Bytecodes::_i2l: // fall through case Bytecodes::_f2l: // fall through case Bytecodes::_d2l: tos_out = ltos; break; case Bytecodes::_i2f: // fall through case Bytecodes::_l2f: // fall through case Bytecodes::_d2f: tos_out = ftos; break; case Bytecodes::_i2d: // fall through case Bytecodes::_l2d: // fall through case Bytecodes::_f2d: tos_out = dtos; break; default : ShouldNotReachHere(); } transition(tos_in, tos_out); } #endif // ASSERT // Conversion // (Note: use push(rcx)/pop(rcx) for 1/2-word stack-ptr manipulation) switch (bytecode()) { case Bytecodes::_i2l: __ extend_sign(rdx, rax); break; case Bytecodes::_i2f: __ push(rax); // store int on tos __ fild_s(at_rsp()); // load int to ST0 __ f2ieee(); // truncate to float size __ pop(rcx); // adjust rsp break; case Bytecodes::_i2d: __ push(rax); // add one slot for d2ieee() __ push(rax); // store int on tos __ fild_s(at_rsp()); // load int to ST0 __ d2ieee(); // truncate to double size __ pop(rcx); // adjust rsp __ pop(rcx); break; case Bytecodes::_i2b: __ shll(rax, 24); // truncate upper 24 bits __ sarl(rax, 24); // and sign-extend byte LP64_ONLY(__ movsbl(rax, rax)); break; case Bytecodes::_i2c: __ andl(rax, 0xFFFF); // truncate upper 16 bits LP64_ONLY(__ movzwl(rax, rax)); break; case Bytecodes::_i2s: __ shll(rax, 16); // truncate upper 16 bits __ sarl(rax, 16); // and sign-extend short LP64_ONLY(__ movswl(rax, rax)); break; case Bytecodes::_l2i: /* nothing to do */ break; case Bytecodes::_l2f: __ push(rdx); // store long on tos __ push(rax); __ fild_d(at_rsp()); // load long to ST0 __ f2ieee(); // truncate to float size __ pop(rcx); // adjust rsp __ pop(rcx); break; case Bytecodes::_l2d: __ push(rdx); // store long on tos __ push(rax); __ fild_d(at_rsp()); // load long to ST0 __ d2ieee(); // truncate to double size __ pop(rcx); // adjust rsp __ pop(rcx); break; case Bytecodes::_f2i: __ push(rcx); // reserve space for argument __ fstp_s(at_rsp()); // pass float argument on stack __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1); break; case Bytecodes::_f2l: __ push(rcx); // reserve space for argument __ fstp_s(at_rsp()); // pass float argument on stack __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1); break; case Bytecodes::_f2d: /* nothing to do */ break; case Bytecodes::_d2i: __ push(rcx); // reserve space for argument __ push(rcx); __ fstp_d(at_rsp()); // pass double argument on stack __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 2); break; case Bytecodes::_d2l: __ push(rcx); // reserve space for argument __ push(rcx); __ fstp_d(at_rsp()); // pass double argument on stack __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 2); break; case Bytecodes::_d2f: __ push(rcx); // reserve space for f2ieee() __ f2ieee(); // truncate to float size __ pop(rcx); // adjust rsp break; default : ShouldNotReachHere(); } } void TemplateTable::lcmp() { transition(ltos, itos); // y = rdx:rax __ pop_l(rbx, rcx); // get x = rcx:rbx __ lcmp2int(rcx, rbx, rdx, rax);// rcx := cmp(x, y) __ mov(rax, rcx); } void TemplateTable::float_cmp(bool is_float, int unordered_result) { if (is_float) { __ fld_s(at_rsp()); } else { __ fld_d(at_rsp()); __ pop(rdx); } __ pop(rcx); __ fcmp2int(rax, unordered_result < 0); } void TemplateTable::branch(bool is_jsr, bool is_wide) { __ get_method(rcx); // ECX holds method __ profile_taken_branch(rax,rbx); // EAX holds updated MDP, EBX holds bumped taken count const ByteSize be_offset = Method::backedge_counter_offset() + InvocationCounter::counter_offset(); const ByteSize inv_offset = Method::invocation_counter_offset() + InvocationCounter::counter_offset(); const int method_offset = frame::interpreter_frame_method_offset * wordSize; // Load up EDX with the branch displacement __ movl(rdx, at_bcp(1)); __ bswapl(rdx); if (!is_wide) __ sarl(rdx, 16); LP64_ONLY(__ movslq(rdx, rdx)); // Handle all the JSR stuff here, then exit. // It's much shorter and cleaner than intermingling with the // non-JSR normal-branch stuff occurring below. if (is_jsr) { // Pre-load the next target bytecode into EBX __ load_unsigned_byte(rbx, Address(rsi, rdx, Address::times_1, 0)); // compute return address as bci in rax, __ lea(rax, at_bcp((is_wide ? 5 : 3) - in_bytes(ConstMethod::codes_offset()))); __ subptr(rax, Address(rcx, Method::const_offset())); // Adjust the bcp in RSI by the displacement in EDX __ addptr(rsi, rdx); // Push return address __ push_i(rax); // jsr returns vtos __ dispatch_only_noverify(vtos); return; } // Normal (non-jsr) branch handling // Adjust the bcp in RSI by the displacement in EDX __ addptr(rsi, rdx); assert(UseLoopCounter || !UseOnStackReplacement, "on-stack-replacement requires loop counters"); Label backedge_counter_overflow; Label profile_method; Label dispatch; if (UseLoopCounter) { // increment backedge counter for backward branches // rax,: MDO // rbx,: MDO bumped taken-count // rcx: method // rdx: target offset // rsi: target bcp // rdi: locals pointer __ testl(rdx, rdx); // check if forward or backward branch __ jcc(Assembler::positive, dispatch); // count only if backward branch if (TieredCompilation) { Label no_mdo; int increment = InvocationCounter::count_increment; int mask = ((1 << Tier0BackedgeNotifyFreqLog) - 1) << InvocationCounter::count_shift; if (ProfileInterpreter) { // Are we profiling? __ movptr(rbx, Address(rcx, in_bytes(Method::method_data_offset()))); __ testptr(rbx, rbx); __ jccb(Assembler::zero, no_mdo); // Increment the MDO backedge counter const Address mdo_backedge_counter(rbx, in_bytes(MethodData::backedge_counter_offset()) + in_bytes(InvocationCounter::counter_offset())); __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, rax, false, Assembler::zero, &backedge_counter_overflow); __ jmp(dispatch); } __ bind(no_mdo); // Increment backedge counter in Method* __ increment_mask_and_jump(Address(rcx, be_offset), increment, mask, rax, false, Assembler::zero, &backedge_counter_overflow); } else { // increment counter __ movl(rax, Address(rcx, be_offset)); // load backedge counter __ incrementl(rax, InvocationCounter::count_increment); // increment counter __ movl(Address(rcx, be_offset), rax); // store counter __ movl(rax, Address(rcx, inv_offset)); // load invocation counter __ andl(rax, InvocationCounter::count_mask_value); // and the status bits __ addl(rax, Address(rcx, be_offset)); // add both counters if (ProfileInterpreter) { // Test to see if we should create a method data oop __ cmp32(rax, ExternalAddress((address) &InvocationCounter::InterpreterProfileLimit)); __ jcc(Assembler::less, dispatch); // if no method data exists, go to profile method __ test_method_data_pointer(rax, profile_method); if (UseOnStackReplacement) { // check for overflow against rbx, which is the MDO taken count __ cmp32(rbx, ExternalAddress((address) &InvocationCounter::InterpreterBackwardBranchLimit)); __ jcc(Assembler::below, dispatch); // When ProfileInterpreter is on, the backedge_count comes from the // MethodData*, which value does not get reset on the call to // frequency_counter_overflow(). To avoid excessive calls to the overflow // routine while the method is being compiled, add a second test to make // sure the overflow function is called only once every overflow_frequency. const int overflow_frequency = 1024; __ andptr(rbx, overflow_frequency-1); __ jcc(Assembler::zero, backedge_counter_overflow); } } else { if (UseOnStackReplacement) { // check for overflow against rax, which is the sum of the counters __ cmp32(rax, ExternalAddress((address) &InvocationCounter::InterpreterBackwardBranchLimit)); __ jcc(Assembler::aboveEqual, backedge_counter_overflow); } } } __ bind(dispatch); } // Pre-load the next target bytecode into EBX __ load_unsigned_byte(rbx, Address(rsi, 0)); // continue with the bytecode @ target // rax,: return bci for jsr's, unused otherwise // rbx,: target bytecode // rsi: target bcp __ dispatch_only(vtos); if (UseLoopCounter) { if (ProfileInterpreter) { // Out-of-line code to allocate method data oop. __ bind(profile_method); __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); __ load_unsigned_byte(rbx, Address(rsi, 0)); // restore target bytecode __ set_method_data_pointer_for_bcp(); __ jmp(dispatch); } if (UseOnStackReplacement) { // invocation counter overflow __ bind(backedge_counter_overflow); __ negptr(rdx); __ addptr(rdx, rsi); // branch bcp call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rdx); __ load_unsigned_byte(rbx, Address(rsi, 0)); // restore target bytecode // rax,: osr nmethod (osr ok) or NULL (osr not possible) // rbx,: target bytecode // rdx: scratch // rdi: locals pointer // rsi: bcp __ testptr(rax, rax); // test result __ jcc(Assembler::zero, dispatch); // no osr if null // nmethod may have been invalidated (VM may block upon call_VM return) __ movl(rcx, Address(rax, nmethod::entry_bci_offset())); __ cmpl(rcx, InvalidOSREntryBci); __ jcc(Assembler::equal, dispatch); // We have the address of an on stack replacement routine in rax, // We need to prepare to execute the OSR method. First we must // migrate the locals and monitors off of the stack. __ mov(rbx, rax); // save the nmethod const Register thread = rcx; __ get_thread(thread); call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin)); // rax, is OSR buffer, move it to expected parameter location __ mov(rcx, rax); // pop the interpreter frame __ movptr(rdx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp __ leave(); // remove frame anchor __ pop(rdi); // get return address __ mov(rsp, rdx); // set sp to sender sp // Align stack pointer for compiled code (note that caller is // responsible for undoing this fixup by remembering the old SP // in an rbp,-relative location) __ andptr(rsp, -(StackAlignmentInBytes)); // push the (possibly adjusted) return address __ push(rdi); // and begin the OSR nmethod __ jmp(Address(rbx, nmethod::osr_entry_point_offset())); } } } void TemplateTable::if_0cmp(Condition cc) { transition(itos, vtos); // assume branch is more often taken than not (loops use backward branches) Label not_taken; __ testl(rax, rax); __ jcc(j_not(cc), not_taken); branch(false, false); __ bind(not_taken); __ profile_not_taken_branch(rax); } void TemplateTable::if_icmp(Condition cc) { transition(itos, vtos); // assume branch is more often taken than not (loops use backward branches) Label not_taken; __ pop_i(rdx); __ cmpl(rdx, rax); __ jcc(j_not(cc), not_taken); branch(false, false); __ bind(not_taken); __ profile_not_taken_branch(rax); } void TemplateTable::if_nullcmp(Condition cc) { transition(atos, vtos); // assume branch is more often taken than not (loops use backward branches) Label not_taken; __ testptr(rax, rax); __ jcc(j_not(cc), not_taken); branch(false, false); __ bind(not_taken); __ profile_not_taken_branch(rax); } void TemplateTable::if_acmp(Condition cc) { transition(atos, vtos); // assume branch is more often taken than not (loops use backward branches) Label not_taken; __ pop_ptr(rdx); __ cmpptr(rdx, rax); __ jcc(j_not(cc), not_taken); branch(false, false); __ bind(not_taken); __ profile_not_taken_branch(rax); } void TemplateTable::ret() { transition(vtos, vtos); locals_index(rbx); __ movptr(rbx, iaddress(rbx)); // get return bci, compute return bcp __ profile_ret(rbx, rcx); __ get_method(rax); __ movptr(rsi, Address(rax, Method::const_offset())); __ lea(rsi, Address(rsi, rbx, Address::times_1, ConstMethod::codes_offset())); __ dispatch_next(vtos); } void TemplateTable::wide_ret() { transition(vtos, vtos); locals_index_wide(rbx); __ movptr(rbx, iaddress(rbx)); // get return bci, compute return bcp __ profile_ret(rbx, rcx); __ get_method(rax); __ movptr(rsi, Address(rax, Method::const_offset())); __ lea(rsi, Address(rsi, rbx, Address::times_1, ConstMethod::codes_offset())); __ dispatch_next(vtos); } void TemplateTable::tableswitch() { Label default_case, continue_execution; transition(itos, vtos); // align rsi __ lea(rbx, at_bcp(wordSize)); __ andptr(rbx, -wordSize); // load lo & hi __ movl(rcx, Address(rbx, 1 * wordSize)); __ movl(rdx, Address(rbx, 2 * wordSize)); __ bswapl(rcx); __ bswapl(rdx); // check against lo & hi __ cmpl(rax, rcx); __ jccb(Assembler::less, default_case); __ cmpl(rax, rdx); __ jccb(Assembler::greater, default_case); // lookup dispatch offset __ subl(rax, rcx); __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt)); __ profile_switch_case(rax, rbx, rcx); // continue execution __ bind(continue_execution); __ bswapl(rdx); __ load_unsigned_byte(rbx, Address(rsi, rdx, Address::times_1)); __ addptr(rsi, rdx); __ dispatch_only(vtos); // handle default __ bind(default_case); __ profile_switch_default(rax); __ movl(rdx, Address(rbx, 0)); __ jmp(continue_execution); } void TemplateTable::lookupswitch() { transition(itos, itos); __ stop("lookupswitch bytecode should have been rewritten"); } void TemplateTable::fast_linearswitch() { transition(itos, vtos); Label loop_entry, loop, found, continue_execution; // bswapl rax, so we can avoid bswapping the table entries __ bswapl(rax); // align rsi __ lea(rbx, at_bcp(wordSize)); // btw: should be able to get rid of this instruction (change offsets below) __ andptr(rbx, -wordSize); // set counter __ movl(rcx, Address(rbx, wordSize)); __ bswapl(rcx); __ jmpb(loop_entry); // table search __ bind(loop); __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * wordSize)); __ jccb(Assembler::equal, found); __ bind(loop_entry); __ decrementl(rcx); __ jcc(Assembler::greaterEqual, loop); // default case __ profile_switch_default(rax); __ movl(rdx, Address(rbx, 0)); __ jmpb(continue_execution); // entry found -> get offset __ bind(found); __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * wordSize)); __ profile_switch_case(rcx, rax, rbx); // continue execution __ bind(continue_execution); __ bswapl(rdx); __ load_unsigned_byte(rbx, Address(rsi, rdx, Address::times_1)); __ addptr(rsi, rdx); __ dispatch_only(vtos); } void TemplateTable::fast_binaryswitch() { transition(itos, vtos); // Implementation using the following core algorithm: // // int binary_search(int key, LookupswitchPair* array, int n) { // // Binary search according to "Methodik des Programmierens" by // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985. // int i = 0; // int j = n; // while (i+1 < j) { // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q) // // with Q: for all i: 0 <= i < n: key < a[i] // // where a stands for the array and assuming that the (inexisting) // // element a[n] is infinitely big. // int h = (i + j) >> 1; // // i < h < j // if (key < array[h].fast_match()) { // j = h; // } else { // i = h; // } // } // // R: a[i] <= key < a[i+1] or Q // // (i.e., if key is within array, i is the correct index) // return i; // } // register allocation const Register key = rax; // already set (tosca) const Register array = rbx; const Register i = rcx; const Register j = rdx; const Register h = rdi; // needs to be restored const Register temp = rsi; // setup array __ save_bcp(); __ lea(array, at_bcp(3*wordSize)); // btw: should be able to get rid of this instruction (change offsets below) __ andptr(array, -wordSize); // initialize i & j __ xorl(i, i); // i = 0; __ movl(j, Address(array, -wordSize)); // j = length(array); // Convert j into native byteordering __ bswapl(j); // and start Label entry; __ jmp(entry); // binary search loop { Label loop; __ bind(loop); // int h = (i + j) >> 1; __ leal(h, Address(i, j, Address::times_1)); // h = i + j; __ sarl(h, 1); // h = (i + j) >> 1; // if (key < array[h].fast_match()) { // j = h; // } else { // i = h; // } // Convert array[h].match to native byte-ordering before compare __ movl(temp, Address(array, h, Address::times_8, 0*wordSize)); __ bswapl(temp); __ cmpl(key, temp); // j = h if (key < array[h].fast_match()) __ cmov32(Assembler::less , j, h); // i = h if (key >= array[h].fast_match()) __ cmov32(Assembler::greaterEqual, i, h); // while (i+1 < j) __ bind(entry); __ leal(h, Address(i, 1)); // i+1 __ cmpl(h, j); // i+1 < j __ jcc(Assembler::less, loop); } // end of binary search, result index is i (must check again!) Label default_case; // Convert array[i].match to native byte-ordering before compare __ movl(temp, Address(array, i, Address::times_8, 0*wordSize)); __ bswapl(temp); __ cmpl(key, temp); __ jcc(Assembler::notEqual, default_case); // entry found -> j = offset __ movl(j , Address(array, i, Address::times_8, 1*wordSize)); __ profile_switch_case(i, key, array); __ bswapl(j); LP64_ONLY(__ movslq(j, j)); __ restore_bcp(); __ restore_locals(); // restore rdi __ load_unsigned_byte(rbx, Address(rsi, j, Address::times_1)); __ addptr(rsi, j); __ dispatch_only(vtos); // default case -> j = default offset __ bind(default_case); __ profile_switch_default(i); __ movl(j, Address(array, -2*wordSize)); __ bswapl(j); LP64_ONLY(__ movslq(j, j)); __ restore_bcp(); __ restore_locals(); // restore rdi __ load_unsigned_byte(rbx, Address(rsi, j, Address::times_1)); __ addptr(rsi, j); __ dispatch_only(vtos); } void TemplateTable::_return(TosState state) { transition(state, state); assert(_desc->calls_vm(), "inconsistent calls_vm information"); // call in remove_activation if (_desc->bytecode() == Bytecodes::_return_register_finalizer) { assert(state == vtos, "only valid state"); __ movptr(rax, aaddress(0)); __ load_klass(rdi, rax); __ movl(rdi, Address(rdi, Klass::access_flags_offset())); __ testl(rdi, JVM_ACC_HAS_FINALIZER); Label skip_register_finalizer; __ jcc(Assembler::zero, skip_register_finalizer); __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), rax); __ bind(skip_register_finalizer); } __ remove_activation(state, rsi); __ jmp(rsi); } // ---------------------------------------------------------------------------- // Volatile variables demand their effects be made known to all CPU's in // order. Store buffers on most chips allow reads & writes to reorder; the // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of // memory barrier (i.e., it's not sufficient that the interpreter does not // reorder volatile references, the hardware also must not reorder them). // // According to the new Java Memory Model (JMM): // (1) All volatiles are serialized wrt to each other. // ALSO reads & writes act as aquire & release, so: // (2) A read cannot let unrelated NON-volatile memory refs that happen after // the read float up to before the read. It's OK for non-volatile memory refs // that happen before the volatile read to float down below it. // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs // that happen BEFORE the write float down to after the write. It's OK for // non-volatile memory refs that happen after the volatile write to float up // before it. // // We only put in barriers around volatile refs (they are expensive), not // _between_ memory refs (that would require us to track the flavor of the // previous memory refs). Requirements (2) and (3) require some barriers // before volatile stores and after volatile loads. These nearly cover // requirement (1) but miss the volatile-store-volatile-load case. This final // case is placed after volatile-stores although it could just as well go // before volatile-loads. void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) { // Helper function to insert a is-volatile test and memory barrier if( !os::is_MP() ) return; // Not needed on single CPU __ membar(order_constraint); } void TemplateTable::resolve_cache_and_index(int byte_no, Register Rcache, Register index, size_t index_size) { const Register temp = rbx; assert_different_registers(Rcache, index, temp); Label resolved; assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size); __ cmpl(temp, (int) bytecode()); // have we resolved this bytecode? __ jcc(Assembler::equal, resolved); // resolve first time through address entry; switch (bytecode()) { case Bytecodes::_getstatic : // fall through case Bytecodes::_putstatic : // fall through case Bytecodes::_getfield : // fall through case Bytecodes::_putfield : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_get_put); break; case Bytecodes::_invokevirtual : // fall through case Bytecodes::_invokespecial : // fall through case Bytecodes::_invokestatic : // fall through case Bytecodes::_invokeinterface: entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invoke); break; case Bytecodes::_invokehandle : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invokehandle); break; case Bytecodes::_invokedynamic : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invokedynamic); break; default: fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(bytecode()))); break; } __ movl(temp, (int)bytecode()); __ call_VM(noreg, entry, temp); // Update registers with resolved info __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size); __ bind(resolved); } // The cache and index registers must be set before call void TemplateTable::load_field_cp_cache_entry(Register obj, Register cache, Register index, Register off, Register flags, bool is_static = false) { assert_different_registers(cache, index, flags, off); ByteSize cp_base_offset = ConstantPoolCache::base_offset(); // Field offset __ movptr(off, Address(cache, index, Address::times_ptr, in_bytes(cp_base_offset + ConstantPoolCacheEntry::f2_offset()))); // Flags __ movl(flags, Address(cache, index, Address::times_ptr, in_bytes(cp_base_offset + ConstantPoolCacheEntry::flags_offset()))); // klass overwrite register if (is_static) { __ movptr(obj, Address(cache, index, Address::times_ptr, in_bytes(cp_base_offset + ConstantPoolCacheEntry::f1_offset()))); const int mirror_offset = in_bytes(Klass::java_mirror_offset()); __ movptr(obj, Address(obj, mirror_offset)); } } void TemplateTable::load_invoke_cp_cache_entry(int byte_no, Register method, Register itable_index, Register flags, bool is_invokevirtual, bool is_invokevfinal, /*unused*/ bool is_invokedynamic) { // setup registers const Register cache = rcx; const Register index = rdx; assert_different_registers(method, flags); assert_different_registers(method, cache, index); assert_different_registers(itable_index, flags); assert_different_registers(itable_index, cache, index); // determine constant pool cache field offsets assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant"); const int method_offset = in_bytes( ConstantPoolCache::base_offset() + ((byte_no == f2_byte) ? ConstantPoolCacheEntry::f2_offset() : ConstantPoolCacheEntry::f1_offset())); const int flags_offset = in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()); // access constant pool cache fields const int index_offset = in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset()); size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2)); resolve_cache_and_index(byte_no, cache, index, index_size); __ movptr(method, Address(cache, index, Address::times_ptr, method_offset)); if (itable_index != noreg) { __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset)); } __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset)); } // The registers cache and index expected to be set before call. // Correct values of the cache and index registers are preserved. void TemplateTable::jvmti_post_field_access(Register cache, Register index, bool is_static, bool has_tos) { if (JvmtiExport::can_post_field_access()) { // Check to see if a field access watch has been set before we take // the time to call into the VM. Label L1; assert_different_registers(cache, index, rax); __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); __ testl(rax,rax); __ jcc(Assembler::zero, L1); // cache entry pointer __ addptr(cache, in_bytes(ConstantPoolCache::base_offset())); __ shll(index, LogBytesPerWord); __ addptr(cache, index); if (is_static) { __ xorptr(rax, rax); // NULL object reference } else { __ pop(atos); // Get the object __ verify_oop(rax); __ push(atos); // Restore stack state } // rax,: object pointer or NULL // cache: cache entry pointer __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, cache); __ get_cache_and_index_at_bcp(cache, index, 1); __ bind(L1); } } void TemplateTable::pop_and_check_object(Register r) { __ pop_ptr(r); __ null_check(r); // for field access must check obj. __ verify_oop(r); } void TemplateTable::getfield_or_static(int byte_no, bool is_static) { transition(vtos, vtos); const Register cache = rcx; const Register index = rdx; const Register obj = rcx; const Register off = rbx; const Register flags = rax; resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); jvmti_post_field_access(cache, index, is_static, false); load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); if (!is_static) pop_and_check_object(obj); const Address lo(obj, off, Address::times_1, 0*wordSize); const Address hi(obj, off, Address::times_1, 1*wordSize); Label Done, notByte, notInt, notShort, notChar, notLong, notFloat, notObj, notDouble; __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); assert(btos == 0, "change code, btos != 0"); // btos __ andptr(flags, ConstantPoolCacheEntry::tos_state_mask); __ jcc(Assembler::notZero, notByte); __ load_signed_byte(rax, lo ); __ push(btos); // Rewrite bytecode to be faster if (!is_static) { patch_bytecode(Bytecodes::_fast_bgetfield, rcx, rbx); } __ jmp(Done); __ bind(notByte); // itos __ cmpl(flags, itos ); __ jcc(Assembler::notEqual, notInt); __ movl(rax, lo ); __ push(itos); // Rewrite bytecode to be faster if (!is_static) { patch_bytecode(Bytecodes::_fast_igetfield, rcx, rbx); } __ jmp(Done); __ bind(notInt); // atos __ cmpl(flags, atos ); __ jcc(Assembler::notEqual, notObj); __ movl(rax, lo ); __ push(atos); if (!is_static) { patch_bytecode(Bytecodes::_fast_agetfield, rcx, rbx); } __ jmp(Done); __ bind(notObj); // ctos __ cmpl(flags, ctos ); __ jcc(Assembler::notEqual, notChar); __ load_unsigned_short(rax, lo ); __ push(ctos); if (!is_static) { patch_bytecode(Bytecodes::_fast_cgetfield, rcx, rbx); } __ jmp(Done); __ bind(notChar); // stos __ cmpl(flags, stos ); __ jcc(Assembler::notEqual, notShort); __ load_signed_short(rax, lo ); __ push(stos); if (!is_static) { patch_bytecode(Bytecodes::_fast_sgetfield, rcx, rbx); } __ jmp(Done); __ bind(notShort); // ltos __ cmpl(flags, ltos ); __ jcc(Assembler::notEqual, notLong); // Generate code as if volatile. There just aren't enough registers to // save that information and this code is faster than the test. __ fild_d(lo); // Must load atomically __ subptr(rsp,2*wordSize); // Make space for store __ fistp_d(Address(rsp,0)); __ pop(rax); __ pop(rdx); __ push(ltos); // Don't rewrite to _fast_lgetfield for potential volatile case. __ jmp(Done); __ bind(notLong); // ftos __ cmpl(flags, ftos ); __ jcc(Assembler::notEqual, notFloat); __ fld_s(lo); __ push(ftos); if (!is_static) { patch_bytecode(Bytecodes::_fast_fgetfield, rcx, rbx); } __ jmp(Done); __ bind(notFloat); // dtos __ cmpl(flags, dtos ); __ jcc(Assembler::notEqual, notDouble); __ fld_d(lo); __ push(dtos); if (!is_static) { patch_bytecode(Bytecodes::_fast_dgetfield, rcx, rbx); } __ jmpb(Done); __ bind(notDouble); __ stop("Bad state"); __ bind(Done); // Doug Lea believes this is not needed with current Sparcs (TSO) and Intel (PSO). // volatile_barrier( ); } void TemplateTable::getfield(int byte_no) { getfield_or_static(byte_no, false); } void TemplateTable::getstatic(int byte_no) { getfield_or_static(byte_no, true); } // The registers cache and index expected to be set before call. // The function may destroy various registers, just not the cache and index registers. void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) { ByteSize cp_base_offset = ConstantPoolCache::base_offset(); if (JvmtiExport::can_post_field_modification()) { // Check to see if a field modification watch has been set before we take // the time to call into the VM. Label L1; assert_different_registers(cache, index, rax); __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); __ testl(rax, rax); __ jcc(Assembler::zero, L1); // The cache and index registers have been already set. // This allows to eliminate this call but the cache and index // registers have to be correspondingly used after this line. __ get_cache_and_index_at_bcp(rax, rdx, 1); if (is_static) { // Life is simple. Null out the object pointer. __ xorptr(rbx, rbx); } else { // Life is harder. The stack holds the value on top, followed by the object. // We don't know the size of the value, though; it could be one or two words // depending on its type. As a result, we must find the type to determine where // the object is. Label two_word, valsize_known; __ movl(rcx, Address(rax, rdx, Address::times_ptr, in_bytes(cp_base_offset + ConstantPoolCacheEntry::flags_offset()))); __ mov(rbx, rsp); __ shrl(rcx, ConstantPoolCacheEntry::tos_state_shift); // Make sure we don't need to mask rcx after the above shift ConstantPoolCacheEntry::verify_tos_state_shift(); __ cmpl(rcx, ltos); __ jccb(Assembler::equal, two_word); __ cmpl(rcx, dtos); __ jccb(Assembler::equal, two_word); __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos) __ jmpb(valsize_known); __ bind(two_word); __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue __ bind(valsize_known); // setup object pointer __ movptr(rbx, Address(rbx, 0)); } // cache entry pointer __ addptr(rax, in_bytes(cp_base_offset)); __ shll(rdx, LogBytesPerWord); __ addptr(rax, rdx); // object (tos) __ mov(rcx, rsp); // rbx,: object pointer set up above (NULL if static) // rax,: cache entry pointer // rcx: jvalue object on the stack __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx); __ get_cache_and_index_at_bcp(cache, index, 1); __ bind(L1); } } void TemplateTable::putfield_or_static(int byte_no, bool is_static) { transition(vtos, vtos); const Register cache = rcx; const Register index = rdx; const Register obj = rcx; const Register off = rbx; const Register flags = rax; resolve_cache_and_index(byte_no, cache, index, sizeof(u2)); jvmti_post_field_mod(cache, index, is_static); load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); // Doug Lea believes this is not needed with current Sparcs (TSO) and Intel (PSO). // volatile_barrier( ); Label notVolatile, Done; __ movl(rdx, flags); __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); __ andl(rdx, 0x1); // field addresses const Address lo(obj, off, Address::times_1, 0*wordSize); const Address hi(obj, off, Address::times_1, 1*wordSize); Label notByte, notInt, notShort, notChar, notLong, notFloat, notObj, notDouble; __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); assert(btos == 0, "change code, btos != 0"); __ andl(flags, ConstantPoolCacheEntry::tos_state_mask); __ jcc(Assembler::notZero, notByte); // btos { __ pop(btos); if (!is_static) pop_and_check_object(obj); __ movb(lo, rax); if (!is_static) { patch_bytecode(Bytecodes::_fast_bputfield, rcx, rbx, true, byte_no); } __ jmp(Done); } __ bind(notByte); __ cmpl(flags, itos); __ jcc(Assembler::notEqual, notInt); // itos { __ pop(itos); if (!is_static) pop_and_check_object(obj); __ movl(lo, rax); if (!is_static) { patch_bytecode(Bytecodes::_fast_iputfield, rcx, rbx, true, byte_no); } __ jmp(Done); } __ bind(notInt); __ cmpl(flags, atos); __ jcc(Assembler::notEqual, notObj); // atos { __ pop(atos); if (!is_static) pop_and_check_object(obj); do_oop_store(_masm, lo, rax, _bs->kind(), false); if (!is_static) { patch_bytecode(Bytecodes::_fast_aputfield, rcx, rbx, true, byte_no); } __ jmp(Done); } __ bind(notObj); __ cmpl(flags, ctos); __ jcc(Assembler::notEqual, notChar); // ctos { __ pop(ctos); if (!is_static) pop_and_check_object(obj); __ movw(lo, rax); if (!is_static) { patch_bytecode(Bytecodes::_fast_cputfield, rcx, rbx, true, byte_no); } __ jmp(Done); } __ bind(notChar); __ cmpl(flags, stos); __ jcc(Assembler::notEqual, notShort); // stos { __ pop(stos); if (!is_static) pop_and_check_object(obj); __ movw(lo, rax); if (!is_static) { patch_bytecode(Bytecodes::_fast_sputfield, rcx, rbx, true, byte_no); } __ jmp(Done); } __ bind(notShort); __ cmpl(flags, ltos); __ jcc(Assembler::notEqual, notLong); // ltos { Label notVolatileLong; __ testl(rdx, rdx); __ jcc(Assembler::zero, notVolatileLong); __ pop(ltos); // overwrites rdx, do this after testing volatile. if (!is_static) pop_and_check_object(obj); // Replace with real volatile test __ push(rdx); __ push(rax); // Must update atomically with FIST __ fild_d(Address(rsp,0)); // So load into FPU register __ fistp_d(lo); // and put into memory atomically __ addptr(rsp, 2*wordSize); // volatile_barrier(); volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | Assembler::StoreStore)); // Don't rewrite volatile version __ jmp(notVolatile); __ bind(notVolatileLong); __ pop(ltos); // overwrites rdx if (!is_static) pop_and_check_object(obj); NOT_LP64(__ movptr(hi, rdx)); __ movptr(lo, rax); if (!is_static) { patch_bytecode(Bytecodes::_fast_lputfield, rcx, rbx, true, byte_no); } __ jmp(notVolatile); } __ bind(notLong); __ cmpl(flags, ftos); __ jcc(Assembler::notEqual, notFloat); // ftos { __ pop(ftos); if (!is_static) pop_and_check_object(obj); __ fstp_s(lo); if (!is_static) { patch_bytecode(Bytecodes::_fast_fputfield, rcx, rbx, true, byte_no); } __ jmp(Done); } __ bind(notFloat); #ifdef ASSERT __ cmpl(flags, dtos); __ jcc(Assembler::notEqual, notDouble); #endif // dtos { __ pop(dtos); if (!is_static) pop_and_check_object(obj); __ fstp_d(lo); if (!is_static) { patch_bytecode(Bytecodes::_fast_dputfield, rcx, rbx, true, byte_no); } __ jmp(Done); } #ifdef ASSERT __ bind(notDouble); __ stop("Bad state"); #endif __ bind(Done); // Check for volatile store __ testl(rdx, rdx); __ jcc(Assembler::zero, notVolatile); volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | Assembler::StoreStore)); __ bind(notVolatile); } void TemplateTable::putfield(int byte_no) { putfield_or_static(byte_no, false); } void TemplateTable::putstatic(int byte_no) { putfield_or_static(byte_no, true); } void TemplateTable::jvmti_post_fast_field_mod() { if (JvmtiExport::can_post_field_modification()) { // Check to see if a field modification watch has been set before we take // the time to call into the VM. Label L2; __ mov32(rcx, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); __ testl(rcx,rcx); __ jcc(Assembler::zero, L2); __ pop_ptr(rbx); // copy the object pointer from tos __ verify_oop(rbx); __ push_ptr(rbx); // put the object pointer back on tos // Save tos values before call_VM() clobbers them. Since we have // to do it for every data type, we use the saved values as the // jvalue object. switch (bytecode()) { // load values into the jvalue object case Bytecodes::_fast_aputfield: __ push_ptr(rax); break; case Bytecodes::_fast_bputfield: // fall through case Bytecodes::_fast_sputfield: // fall through case Bytecodes::_fast_cputfield: // fall through case Bytecodes::_fast_iputfield: __ push_i(rax); break; case Bytecodes::_fast_dputfield: __ push_d(); break; case Bytecodes::_fast_fputfield: __ push_f(); break; case Bytecodes::_fast_lputfield: __ push_l(rax); break; default: ShouldNotReachHere(); } __ mov(rcx, rsp); // points to jvalue on the stack // access constant pool cache entry __ get_cache_entry_pointer_at_bcp(rax, rdx, 1); __ verify_oop(rbx); // rbx,: object pointer copied above // rax,: cache entry pointer // rcx: jvalue object on the stack __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx); switch (bytecode()) { // restore tos values case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break; case Bytecodes::_fast_bputfield: // fall through case Bytecodes::_fast_sputfield: // fall through case Bytecodes::_fast_cputfield: // fall through case Bytecodes::_fast_iputfield: __ pop_i(rax); break; case Bytecodes::_fast_dputfield: __ pop_d(); break; case Bytecodes::_fast_fputfield: __ pop_f(); break; case Bytecodes::_fast_lputfield: __ pop_l(rax); break; } __ bind(L2); } } void TemplateTable::fast_storefield(TosState state) { transition(state, vtos); ByteSize base = ConstantPoolCache::base_offset(); jvmti_post_fast_field_mod(); // access constant pool cache __ get_cache_and_index_at_bcp(rcx, rbx, 1); // test for volatile with rdx but rdx is tos register for lputfield. if (bytecode() == Bytecodes::_fast_lputfield) __ push(rdx); __ movl(rdx, Address(rcx, rbx, Address::times_ptr, in_bytes(base + ConstantPoolCacheEntry::flags_offset()))); // replace index with field offset from cache entry __ movptr(rbx, Address(rcx, rbx, Address::times_ptr, in_bytes(base + ConstantPoolCacheEntry::f2_offset()))); // Doug Lea believes this is not needed with current Sparcs (TSO) and Intel (PSO). // volatile_barrier( ); Label notVolatile, Done; __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift); __ andl(rdx, 0x1); // Check for volatile store __ testl(rdx, rdx); __ jcc(Assembler::zero, notVolatile); if (bytecode() == Bytecodes::_fast_lputfield) __ pop(rdx); // Get object from stack pop_and_check_object(rcx); // field addresses const Address lo(rcx, rbx, Address::times_1, 0*wordSize); const Address hi(rcx, rbx, Address::times_1, 1*wordSize); // access field switch (bytecode()) { case Bytecodes::_fast_bputfield: __ movb(lo, rax); break; case Bytecodes::_fast_sputfield: // fall through case Bytecodes::_fast_cputfield: __ movw(lo, rax); break; case Bytecodes::_fast_iputfield: __ movl(lo, rax); break; case Bytecodes::_fast_lputfield: NOT_LP64(__ movptr(hi, rdx)); __ movptr(lo, rax); break; case Bytecodes::_fast_fputfield: __ fstp_s(lo); break; case Bytecodes::_fast_dputfield: __ fstp_d(lo); break; case Bytecodes::_fast_aputfield: { do_oop_store(_masm, lo, rax, _bs->kind(), false); break; } default: ShouldNotReachHere(); } Label done; volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | Assembler::StoreStore)); // Barriers are so large that short branch doesn't reach! __ jmp(done); // Same code as above, but don't need rdx to test for volatile. __ bind(notVolatile); if (bytecode() == Bytecodes::_fast_lputfield) __ pop(rdx); // Get object from stack pop_and_check_object(rcx); // access field switch (bytecode()) { case Bytecodes::_fast_bputfield: __ movb(lo, rax); break; case Bytecodes::_fast_sputfield: // fall through case Bytecodes::_fast_cputfield: __ movw(lo, rax); break; case Bytecodes::_fast_iputfield: __ movl(lo, rax); break; case Bytecodes::_fast_lputfield: NOT_LP64(__ movptr(hi, rdx)); __ movptr(lo, rax); break; case Bytecodes::_fast_fputfield: __ fstp_s(lo); break; case Bytecodes::_fast_dputfield: __ fstp_d(lo); break; case Bytecodes::_fast_aputfield: { do_oop_store(_masm, lo, rax, _bs->kind(), false); break; } default: ShouldNotReachHere(); } __ bind(done); } void TemplateTable::fast_accessfield(TosState state) { transition(atos, state); // do the JVMTI work here to avoid disturbing the register state below if (JvmtiExport::can_post_field_access()) { // Check to see if a field access watch has been set before we take // the time to call into the VM. Label L1; __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); __ testl(rcx,rcx); __ jcc(Assembler::zero, L1); // access constant pool cache entry __ get_cache_entry_pointer_at_bcp(rcx, rdx, 1); __ push_ptr(rax); // save object pointer before call_VM() clobbers it __ verify_oop(rax); // rax,: object pointer copied above // rcx: cache entry pointer __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx); __ pop_ptr(rax); // restore object pointer __ bind(L1); } // access constant pool cache __ get_cache_and_index_at_bcp(rcx, rbx, 1); // replace index with field offset from cache entry __ movptr(rbx, Address(rcx, rbx, Address::times_ptr, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset()))); // rax,: object __ verify_oop(rax); __ null_check(rax); // field addresses const Address lo = Address(rax, rbx, Address::times_1, 0*wordSize); const Address hi = Address(rax, rbx, Address::times_1, 1*wordSize); // access field switch (bytecode()) { case Bytecodes::_fast_bgetfield: __ movsbl(rax, lo ); break; case Bytecodes::_fast_sgetfield: __ load_signed_short(rax, lo ); break; case Bytecodes::_fast_cgetfield: __ load_unsigned_short(rax, lo ); break; case Bytecodes::_fast_igetfield: __ movl(rax, lo); break; case Bytecodes::_fast_lgetfield: __ stop("should not be rewritten"); break; case Bytecodes::_fast_fgetfield: __ fld_s(lo); break; case Bytecodes::_fast_dgetfield: __ fld_d(lo); break; case Bytecodes::_fast_agetfield: __ movptr(rax, lo); __ verify_oop(rax); break; default: ShouldNotReachHere(); } // Doug Lea believes this is not needed with current Sparcs(TSO) and Intel(PSO) // volatile_barrier( ); } void TemplateTable::fast_xaccess(TosState state) { transition(vtos, state); // get receiver __ movptr(rax, aaddress(0)); // access constant pool cache __ get_cache_and_index_at_bcp(rcx, rdx, 2); __ movptr(rbx, Address(rcx, rdx, Address::times_ptr, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset()))); // make sure exception is reported in correct bcp range (getfield is next instruction) __ increment(rsi); __ null_check(rax); const Address lo = Address(rax, rbx, Address::times_1, 0*wordSize); if (state == itos) { __ movl(rax, lo); } else if (state == atos) { __ movptr(rax, lo); __ verify_oop(rax); } else if (state == ftos) { __ fld_s(lo); } else { ShouldNotReachHere(); } __ decrement(rsi); } //---------------------------------------------------------------------------------------------------- // Calls void TemplateTable::count_calls(Register method, Register temp) { // implemented elsewhere ShouldNotReachHere(); } void TemplateTable::prepare_invoke(int byte_no, Register method, // linked method (or i-klass) Register index, // itable index, MethodType, etc. Register recv, // if caller wants to see it Register flags // if caller wants to test it ) { // determine flags const Bytecodes::Code code = bytecode(); const bool is_invokeinterface = code == Bytecodes::_invokeinterface; const bool is_invokedynamic = code == Bytecodes::_invokedynamic; const bool is_invokehandle = code == Bytecodes::_invokehandle; const bool is_invokevirtual = code == Bytecodes::_invokevirtual; const bool is_invokespecial = code == Bytecodes::_invokespecial; const bool load_receiver = (recv != noreg); const bool save_flags = (flags != noreg); assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), ""); assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal"); assert(flags == noreg || flags == rdx, ""); assert(recv == noreg || recv == rcx, ""); // setup registers & access constant pool cache if (recv == noreg) recv = rcx; if (flags == noreg) flags = rdx; assert_different_registers(method, index, recv, flags); // save 'interpreter return address' __ save_bcp(); load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic); // maybe push appendix to arguments (just before return address) if (is_invokedynamic || is_invokehandle) { Label L_no_push; __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift)); __ jccb(Assembler::zero, L_no_push); // Push the appendix as a trailing parameter. // This must be done before we get the receiver, // since the parameter_size includes it. __ push(rbx); __ mov(rbx, index); assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "appendix expected at index+0"); __ load_resolved_reference_at_index(index, rbx); __ pop(rbx); __ push(index); // push appendix (MethodType, CallSite, etc.) __ bind(L_no_push); } // load receiver if needed (note: no return address pushed yet) if (load_receiver) { __ movl(recv, flags); __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask); const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address const int receiver_is_at_end = -1; // back off one slot to get receiver Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end); __ movptr(recv, recv_addr); __ verify_oop(recv); } if (save_flags) { __ mov(rsi, flags); } // compute return type __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift); // Make sure we don't need to mask flags after the above shift ConstantPoolCacheEntry::verify_tos_state_shift(); // load return address { const address table_addr = (is_invokeinterface || is_invokedynamic) ? (address)Interpreter::return_5_addrs_by_index_table() : (address)Interpreter::return_3_addrs_by_index_table(); ExternalAddress table(table_addr); __ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr))); } // push return address __ push(flags); // Restore flags value from the constant pool cache, and restore rsi // for later null checks. rsi is the bytecode pointer if (save_flags) { __ mov(flags, rsi); __ restore_bcp(); } } void TemplateTable::invokevirtual_helper(Register index, Register recv, Register flags) { // Uses temporary registers rax, rdx assert_different_registers(index, recv, rax, rdx); assert(index == rbx, ""); assert(recv == rcx, ""); // Test for an invoke of a final method Label notFinal; __ movl(rax, flags); __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift)); __ jcc(Assembler::zero, notFinal); const Register method = index; // method must be rbx assert(method == rbx, "Method* must be rbx for interpreter calling convention"); // do the call - the index is actually the method to call // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method* // It's final, need a null check here! __ null_check(recv); // profile this call __ profile_final_call(rax); __ jump_from_interpreted(method, rax); __ bind(notFinal); // get receiver klass __ null_check(recv, oopDesc::klass_offset_in_bytes()); __ load_klass(rax, recv); // profile this call __ profile_virtual_call(rax, rdi, rdx); // get target Method* & entry point __ lookup_virtual_method(rax, index, method); __ jump_from_interpreted(method, rdx); } void TemplateTable::invokevirtual(int byte_no) { transition(vtos, vtos); assert(byte_no == f2_byte, "use this argument"); prepare_invoke(byte_no, rbx, // method or vtable index noreg, // unused itable index rcx, rdx); // recv, flags // rbx: index // rcx: receiver // rdx: flags invokevirtual_helper(rbx, rcx, rdx); } void TemplateTable::invokespecial(int byte_no) { transition(vtos, vtos); assert(byte_no == f1_byte, "use this argument"); prepare_invoke(byte_no, rbx, noreg, // get f1 Method* rcx); // get receiver also for null check __ verify_oop(rcx); __ null_check(rcx); // do the call __ profile_call(rax); __ jump_from_interpreted(rbx, rax); } void TemplateTable::invokestatic(int byte_no) { transition(vtos, vtos); assert(byte_no == f1_byte, "use this argument"); prepare_invoke(byte_no, rbx); // get f1 Method* // do the call __ profile_call(rax); __ jump_from_interpreted(rbx, rax); } void TemplateTable::fast_invokevfinal(int byte_no) { transition(vtos, vtos); assert(byte_no == f2_byte, "use this argument"); __ stop("fast_invokevfinal not used on x86"); } void TemplateTable::invokeinterface(int byte_no) { transition(vtos, vtos); assert(byte_no == f1_byte, "use this argument"); prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 itable index rcx, rdx); // recv, flags // rax: interface klass (from f1) // rbx: itable index (from f2) // rcx: receiver // rdx: flags // Special case of invokeinterface called for virtual method of // java.lang.Object. See cpCacheOop.cpp for details. // This code isn't produced by javac, but could be produced by // another compliant java compiler. Label notMethod; __ movl(rdi, rdx); __ andl(rdi, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift)); __ jcc(Assembler::zero, notMethod); invokevirtual_helper(rbx, rcx, rdx); __ bind(notMethod); // Get receiver klass into rdx - also a null check __ restore_locals(); // restore rdi __ null_check(rcx, oopDesc::klass_offset_in_bytes()); __ load_klass(rdx, rcx); // profile this call __ profile_virtual_call(rdx, rsi, rdi); Label no_such_interface, no_such_method; __ lookup_interface_method(// inputs: rec. class, interface, itable index rdx, rax, rbx, // outputs: method, scan temp. reg rbx, rsi, no_such_interface); // rbx: Method* to call // rcx: receiver // Check for abstract method error // Note: This should be done more efficiently via a throw_abstract_method_error // interpreter entry point and a conditional jump to it in case of a null // method. __ testptr(rbx, rbx); __ jcc(Assembler::zero, no_such_method); // do the call // rcx: receiver // rbx,: Method* __ jump_from_interpreted(rbx, rdx); __ should_not_reach_here(); // exception handling code follows... // note: must restore interpreter registers to canonical // state for exception handling to work correctly! __ bind(no_such_method); // throw exception __ pop(rbx); // pop return address (pushed by prepare_invoke) __ restore_bcp(); // rsi must be correct for exception handler (was destroyed) __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); // the call_VM checks for exception, so we should never return here. __ should_not_reach_here(); __ bind(no_such_interface); // throw exception __ pop(rbx); // pop return address (pushed by prepare_invoke) __ restore_bcp(); // rsi must be correct for exception handler (was destroyed) __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeError)); // the call_VM checks for exception, so we should never return here. __ should_not_reach_here(); } void TemplateTable::invokehandle(int byte_no) { transition(vtos, vtos); assert(byte_no == f1_byte, "use this argument"); const Register rbx_method = rbx; const Register rax_mtype = rax; const Register rcx_recv = rcx; const Register rdx_flags = rdx; if (!EnableInvokeDynamic) { // rewriter does not generate this bytecode __ should_not_reach_here(); return; } prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv); __ verify_method_ptr(rbx_method); __ verify_oop(rcx_recv); __ null_check(rcx_recv); // rax: MethodType object (from cpool->resolved_references[f1], if necessary) // rbx: MH.invokeExact_MT method (from f2) // Note: rax_mtype is already pushed (if necessary) by prepare_invoke // FIXME: profile the LambdaForm also __ profile_final_call(rax); __ jump_from_interpreted(rbx_method, rdx); } void TemplateTable::invokedynamic(int byte_no) { transition(vtos, vtos); assert(byte_no == f1_byte, "use this argument"); if (!EnableInvokeDynamic) { // We should not encounter this bytecode if !EnableInvokeDynamic. // The verifier will stop it. However, if we get past the verifier, // this will stop the thread in a reasonable way, without crashing the JVM. __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeError)); // the call_VM checks for exception, so we should never return here. __ should_not_reach_here(); return; } const Register rbx_method = rbx; const Register rax_callsite = rax; prepare_invoke(byte_no, rbx_method, rax_callsite); // rax: CallSite object (from cpool->resolved_references[f1]) // rbx: MH.linkToCallSite method (from f2) // Note: rax_callsite is already pushed by prepare_invoke // %%% should make a type profile for any invokedynamic that takes a ref argument // profile this call __ profile_call(rsi); __ verify_oop(rax_callsite); __ jump_from_interpreted(rbx_method, rdx); } //---------------------------------------------------------------------------------------------------- // Allocation void TemplateTable::_new() { transition(vtos, atos); __ get_unsigned_2_byte_index_at_bcp(rdx, 1); Label slow_case; Label slow_case_no_pop; Label done; Label initialize_header; Label initialize_object; // including clearing the fields Label allocate_shared; __ get_cpool_and_tags(rcx, rax); // Make sure the class we're about to instantiate has been resolved. // This is done before loading InstanceKlass to be consistent with the order // how Constant Pool is updated (see ConstantPool::klass_at_put) const int tags_offset = Array<u1>::base_offset_in_bytes(); __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class); __ jcc(Assembler::notEqual, slow_case_no_pop); // get InstanceKlass __ movptr(rcx, Address(rcx, rdx, Address::times_ptr, sizeof(ConstantPool))); __ push(rcx); // save the contexts of klass for initializing the header // make sure klass is initialized & doesn't have finalizer // make sure klass is fully initialized __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized); __ jcc(Assembler::notEqual, slow_case); // get instance_size in InstanceKlass (scaled to a count of bytes) __ movl(rdx, Address(rcx, Klass::layout_helper_offset())); // test to see if it has a finalizer or is malformed in some way __ testl(rdx, Klass::_lh_instance_slow_path_bit); __ jcc(Assembler::notZero, slow_case); // // Allocate the instance // 1) Try to allocate in the TLAB // 2) if fail and the object is large allocate in the shared Eden // 3) if the above fails (or is not applicable), go to a slow case // (creates a new TLAB, etc.) const bool allow_shared_alloc = Universe::heap()->supports_inline_contig_alloc() && !CMSIncrementalMode; const Register thread = rcx; if (UseTLAB || allow_shared_alloc) { __ get_thread(thread); } if (UseTLAB) { __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset()))); __ lea(rbx, Address(rax, rdx, Address::times_1)); __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_end_offset()))); __ jcc(Assembler::above, allow_shared_alloc ? allocate_shared : slow_case); __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx); if (ZeroTLAB) { // the fields have been already cleared __ jmp(initialize_header); } else { // initialize both the header and fields __ jmp(initialize_object); } } // Allocation in the shared Eden, if allowed. // // rdx: instance size in bytes if (allow_shared_alloc) { __ bind(allocate_shared); ExternalAddress heap_top((address)Universe::heap()->top_addr()); Label retry; __ bind(retry); __ movptr(rax, heap_top); __ lea(rbx, Address(rax, rdx, Address::times_1)); __ cmpptr(rbx, ExternalAddress((address)Universe::heap()->end_addr())); __ jcc(Assembler::above, slow_case); // Compare rax, with the top addr, and if still equal, store the new // top addr in rbx, at the address of the top addr pointer. Sets ZF if was // equal, and clears it otherwise. Use lock prefix for atomicity on MPs. // // rax,: object begin // rbx,: object end // rdx: instance size in bytes __ locked_cmpxchgptr(rbx, heap_top); // if someone beat us on the allocation, try again, otherwise continue __ jcc(Assembler::notEqual, retry); __ incr_allocated_bytes(thread, rdx, 0); } if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) { // The object is initialized before the header. If the object size is // zero, go directly to the header initialization. __ bind(initialize_object); __ decrement(rdx, sizeof(oopDesc)); __ jcc(Assembler::zero, initialize_header); // Initialize topmost object field, divide rdx by 8, check if odd and // test if zero. __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd // rdx must have been multiple of 8 #ifdef ASSERT // make sure rdx was multiple of 8 Label L; // Ignore partial flag stall after shrl() since it is debug VM __ jccb(Assembler::carryClear, L); __ stop("object size is not multiple of 2 - adjust this code"); __ bind(L); // rdx must be > 0, no extra check needed here #endif // initialize remaining object fields: rdx was a multiple of 8 { Label loop; __ bind(loop); __ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 1*oopSize), rcx); NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 2*oopSize), rcx)); __ decrement(rdx); __ jcc(Assembler::notZero, loop); } // initialize object header only. __ bind(initialize_header); if (UseBiasedLocking) { __ pop(rcx); // get saved klass back in the register. __ movptr(rbx, Address(rcx, Klass::prototype_header_offset())); __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx); } else { __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), (int32_t)markOopDesc::prototype()); // header __ pop(rcx); // get saved klass back in the register. } __ store_klass(rax, rcx); // klass { SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0); // Trigger dtrace event for fastpath __ push(atos); __ call_VM_leaf( CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax); __ pop(atos); } __ jmp(done); } // slow case __ bind(slow_case); __ pop(rcx); // restore stack pointer to what it was when we came in. __ bind(slow_case_no_pop); __ get_constant_pool(rax); __ get_unsigned_2_byte_index_at_bcp(rdx, 1); call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rax, rdx); // continue __ bind(done); } void TemplateTable::newarray() { transition(itos, atos); __ push_i(rax); // make sure everything is on the stack __ load_unsigned_byte(rdx, at_bcp(1)); call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), rdx, rax); __ pop_i(rdx); // discard size } void TemplateTable::anewarray() { transition(itos, atos); __ get_unsigned_2_byte_index_at_bcp(rdx, 1); __ get_constant_pool(rcx); call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), rcx, rdx, rax); } void TemplateTable::arraylength() { transition(atos, itos); __ null_check(rax, arrayOopDesc::length_offset_in_bytes()); __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes())); } void TemplateTable::checkcast() { transition(atos, atos); Label done, is_null, ok_is_subtype, quicked, resolved; __ testptr(rax, rax); // Object is in EAX __ jcc(Assembler::zero, is_null); // Get cpool & tags index __ get_cpool_and_tags(rcx, rdx); // ECX=cpool, EDX=tags array __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // EBX=index // See if bytecode has already been quicked __ cmpb(Address(rdx, rbx, Address::times_1, Array<u1>::base_offset_in_bytes()), JVM_CONSTANT_Class); __ jcc(Assembler::equal, quicked); __ push(atos); call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc) ); // vm_result_2 has metadata result // borrow rdi from locals __ get_thread(rdi); __ get_vm_result_2(rax, rdi); __ restore_locals(); __ pop_ptr(rdx); __ jmpb(resolved); // Get superklass in EAX and subklass in EBX __ bind(quicked); __ mov(rdx, rax); // Save object in EDX; EAX needed for subtype check __ movptr(rax, Address(rcx, rbx, Address::times_ptr, sizeof(ConstantPool))); __ bind(resolved); __ load_klass(rbx, rdx); // Generate subtype check. Blows ECX. Resets EDI. Object in EDX. // Superklass in EAX. Subklass in EBX. __ gen_subtype_check( rbx, ok_is_subtype ); // Come here on failure __ push(rdx); // object is at TOS __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry)); // Come here on success __ bind(ok_is_subtype); __ mov(rax,rdx); // Restore object in EDX // Collect counts on whether this check-cast sees NULLs a lot or not. if (ProfileInterpreter) { __ jmp(done); __ bind(is_null); __ profile_null_seen(rcx); } else { __ bind(is_null); // same as 'done' } __ bind(done); } void TemplateTable::instanceof() { transition(atos, itos); Label done, is_null, ok_is_subtype, quicked, resolved; __ testptr(rax, rax); __ jcc(Assembler::zero, is_null); // Get cpool & tags index __ get_cpool_and_tags(rcx, rdx); // ECX=cpool, EDX=tags array __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // EBX=index // See if bytecode has already been quicked __ cmpb(Address(rdx, rbx, Address::times_1, Array<u1>::base_offset_in_bytes()), JVM_CONSTANT_Class); __ jcc(Assembler::equal, quicked); __ push(atos); call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc) ); // vm_result_2 has metadata result // borrow rdi from locals __ get_thread(rdi); __ get_vm_result_2(rax, rdi); __ restore_locals(); __ pop_ptr(rdx); __ load_klass(rdx, rdx); __ jmp(resolved); // Get superklass in EAX and subklass in EDX __ bind(quicked); __ load_klass(rdx, rax); __ movptr(rax, Address(rcx, rbx, Address::times_ptr, sizeof(ConstantPool))); __ bind(resolved); // Generate subtype check. Blows ECX. Resets EDI. // Superklass in EAX. Subklass in EDX. __ gen_subtype_check( rdx, ok_is_subtype ); // Come here on failure __ xorl(rax,rax); __ jmpb(done); // Come here on success __ bind(ok_is_subtype); __ movl(rax, 1); // Collect counts on whether this test sees NULLs a lot or not. if (ProfileInterpreter) { __ jmp(done); __ bind(is_null); __ profile_null_seen(rcx); } else { __ bind(is_null); // same as 'done' } __ bind(done); // rax, = 0: obj == NULL or obj is not an instanceof the specified klass // rax, = 1: obj != NULL and obj is an instanceof the specified klass } //---------------------------------------------------------------------------------------------------- // Breakpoints void TemplateTable::_breakpoint() { // Note: We get here even if we are single stepping.. // jbug inists on setting breakpoints at every bytecode // even if we are in single step mode. transition(vtos, vtos); // get the unpatched byte code __ get_method(rcx); __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::get_original_bytecode_at), rcx, rsi); __ mov(rbx, rax); // post the breakpoint event __ get_method(rcx); __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), rcx, rsi); // complete the execution of original bytecode __ dispatch_only_normal(vtos); } //---------------------------------------------------------------------------------------------------- // Exceptions void TemplateTable::athrow() { transition(atos, vtos); __ null_check(rax); __ jump(ExternalAddress(Interpreter::throw_exception_entry())); } //---------------------------------------------------------------------------------------------------- // Synchronization // // Note: monitorenter & exit are symmetric routines; which is reflected // in the assembly code structure as well // // Stack layout: // // [expressions ] <--- rsp = expression stack top // .. // [expressions ] // [monitor entry] <--- monitor block top = expression stack bot // .. // [monitor entry] // [frame data ] <--- monitor block bot // ... // [saved rbp, ] <--- rbp, void TemplateTable::monitorenter() { transition(atos, vtos); // check for NULL object __ null_check(rax); const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize); const int entry_size = ( frame::interpreter_frame_monitor_size() * wordSize); Label allocated; // initialize entry pointer __ xorl(rdx, rdx); // points to free slot or NULL // find a free slot in the monitor block (result in rdx) { Label entry, loop, exit; __ movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry __ lea(rbx, monitor_block_bot); // points to word before bottom of monitor block __ jmpb(entry); __ bind(loop); __ cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used __ cmovptr(Assembler::equal, rdx, rcx); // if not used then remember entry in rdx __ cmpptr(rax, Address(rcx, BasicObjectLock::obj_offset_in_bytes())); // check if current entry is for same object __ jccb(Assembler::equal, exit); // if same object then stop searching __ addptr(rcx, entry_size); // otherwise advance to next entry __ bind(entry); __ cmpptr(rcx, rbx); // check if bottom reached __ jcc(Assembler::notEqual, loop); // if not at bottom then check this entry __ bind(exit); } __ testptr(rdx, rdx); // check if a slot has been found __ jccb(Assembler::notZero, allocated); // if found, continue with that one // allocate one if there's no free slot { Label entry, loop; // 1. compute new pointers // rsp: old expression stack top __ movptr(rdx, monitor_block_bot); // rdx: old expression stack bottom __ subptr(rsp, entry_size); // move expression stack top __ subptr(rdx, entry_size); // move expression stack bottom __ mov(rcx, rsp); // set start value for copy loop __ movptr(monitor_block_bot, rdx); // set new monitor block top __ jmp(entry); // 2. move expression stack contents __ bind(loop); __ movptr(rbx, Address(rcx, entry_size)); // load expression stack word from old location __ movptr(Address(rcx, 0), rbx); // and store it at new location __ addptr(rcx, wordSize); // advance to next word __ bind(entry); __ cmpptr(rcx, rdx); // check if bottom reached __ jcc(Assembler::notEqual, loop); // if not at bottom then copy next word } // call run-time routine // rdx: points to monitor entry __ bind(allocated); // Increment bcp to point to the next bytecode, so exception handling for async. exceptions work correctly. // The object has already been poped from the stack, so the expression stack looks correct. __ increment(rsi); __ movptr(Address(rdx, BasicObjectLock::obj_offset_in_bytes()), rax); // store object __ lock_object(rdx); // check to make sure this monitor doesn't cause stack overflow after locking __ save_bcp(); // in case of exception __ generate_stack_overflow_check(0); // The bcp has already been incremented. Just need to dispatch to next instruction. __ dispatch_next(vtos); } void TemplateTable::monitorexit() { transition(atos, vtos); // check for NULL object __ null_check(rax); const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize); const int entry_size = ( frame::interpreter_frame_monitor_size() * wordSize); Label found; // find matching slot { Label entry, loop; __ movptr(rdx, monitor_block_top); // points to current entry, starting with top-most entry __ lea(rbx, monitor_block_bot); // points to word before bottom of monitor block __ jmpb(entry); __ bind(loop); __ cmpptr(rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes())); // check if current entry is for same object __ jcc(Assembler::equal, found); // if same object then stop searching __ addptr(rdx, entry_size); // otherwise advance to next entry __ bind(entry); __ cmpptr(rdx, rbx); // check if bottom reached __ jcc(Assembler::notEqual, loop); // if not at bottom then check this entry } // error handling. Unlocking was not block-structured Label end; __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); __ should_not_reach_here(); // call run-time routine // rcx: points to monitor entry __ bind(found); __ push_ptr(rax); // make sure object is on stack (contract with oopMaps) __ unlock_object(rdx); __ pop_ptr(rax); // discard object __ bind(end); } //---------------------------------------------------------------------------------------------------- // Wide instructions void TemplateTable::wide() { transition(vtos, vtos); __ load_unsigned_byte(rbx, at_bcp(1)); ExternalAddress wtable((address)Interpreter::_wentry_point); __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr))); // Note: the rsi increment step is part of the individual wide bytecode implementations } //---------------------------------------------------------------------------------------------------- // Multi arrays void TemplateTable::multianewarray() { transition(vtos, atos); __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions // last dim is on top of stack; we want address of first one: // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize // the latter wordSize to point to the beginning of the array. __ lea( rax, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize)); call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rax); // pass in rax, __ load_unsigned_byte(rbx, at_bcp(3)); __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts } #endif /* !CC_INTERP */