LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type, bool needs_card_mark) { int elem_size = type2aelembytes(type); int shift = exact_log2(elem_size); LIR_Opr base_opr; int offset = arrayOopDesc::base_offset_in_bytes(type); if (index_opr->is_constant()) { int i = index_opr->as_constant_ptr()->as_jint(); int array_offset = i * elem_size; if (Assembler::is_simm13(array_offset + offset)) { base_opr = array_opr; offset = array_offset + offset; } else { base_opr = new_pointer_register(); if (Assembler::is_simm13(array_offset)) { __ add(array_opr, LIR_OprFact::intptrConst(array_offset), base_opr); } else { __ move(LIR_OprFact::intptrConst(array_offset), base_opr); __ add(base_opr, array_opr, base_opr); } } } else { #ifdef _LP64 if (index_opr->type() == T_INT) { LIR_Opr tmp = new_register(T_LONG); __ convert(Bytecodes::_i2l, index_opr, tmp); index_opr = tmp; } #endif base_opr = new_pointer_register(); assert (index_opr->is_register(), "Must be register"); if (shift > 0) { __ shift_left(index_opr, shift, base_opr); __ add(base_opr, array_opr, base_opr); } else { __ add(index_opr, array_opr, base_opr); } } if (needs_card_mark) { LIR_Opr ptr = new_pointer_register(); __ add(base_opr, LIR_OprFact::intptrConst(offset), ptr); return new LIR_Address(ptr, 0, type); } else { return new LIR_Address(base_opr, offset, type); } }
void LIRGenerator::do_AttemptUpdate(Intrinsic* x) { assert(x->number_of_arguments() == 3, "wrong type"); LIRItem obj (x->argument_at(0), this); // AtomicLong object LIRItem cmp_value (x->argument_at(1), this); // value to compare with field LIRItem new_value (x->argument_at(2), this); // replace field with new_value if it matches cmp_value // compare value must be in rdx,eax (hi,lo); may be destroyed by cmpxchg8 instruction cmp_value.load_item_force(FrameMap::long0_opr); // new value must be in rcx,ebx (hi,lo) new_value.load_item_force(FrameMap::long1_opr); // object pointer register is overwritten with field address obj.load_item(); // generate compare-and-swap; produces zero condition if swap occurs int value_offset = sun_misc_AtomicLongCSImpl::value_offset(); LIR_Opr addr = new_pointer_register(); __ leal(LIR_OprFact::address(new LIR_Address(obj.result(), value_offset, T_LONG)), addr); LIR_Opr t1 = LIR_OprFact::illegalOpr; // no temp needed LIR_Opr t2 = LIR_OprFact::illegalOpr; // no temp needed __ cas_long(addr, cmp_value.result(), new_value.result(), t1, t2); // generate conditional move of boolean result LIR_Opr result = rlock_result(x); __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result, T_LONG); }
LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type, bool needs_card_mark) { int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type); LIR_Address* addr; if (index_opr->is_constant()) { int elem_size = type2aelembytes(type); addr = new LIR_Address(array_opr, offset_in_bytes + index_opr->as_jint() * elem_size, type); } else { #ifdef _LP64 if (index_opr->type() == T_INT) { LIR_Opr tmp = new_register(T_LONG); __ convert(Bytecodes::_i2l, index_opr, tmp); index_opr = tmp; } #endif // _LP64 addr = new LIR_Address(array_opr, index_opr, LIR_Address::scale(type), offset_in_bytes, type); } if (needs_card_mark) { // This store will need a precise card mark, so go ahead and // compute the full adddres instead of computing once for the // store and again for the card mark. LIR_Opr tmp = new_pointer_register(); __ leal(LIR_OprFact::address(addr), tmp); return new LIR_Address(tmp, type); } else { return addr; } }
void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile) { LIR_Opr base_op = src; LIR_Opr index_op = offset; bool is_obj = (type == T_ARRAY || type == T_OBJECT); #ifndef _LP64 if (is_volatile && type == T_LONG) { __ volatile_store_unsafe_reg(data, src, offset, type, NULL, lir_patch_none); } else #endif { if (type == T_BOOLEAN) { type = T_BYTE; } LIR_Address* addr; if (type == T_ARRAY || type == T_OBJECT) { LIR_Opr tmp = new_pointer_register(); __ add(base_op, index_op, tmp); addr = new LIR_Address(tmp, 0, type); } else { addr = new LIR_Address(base_op, index_op, type); } if (is_obj) { pre_barrier(LIR_OprFact::address(addr), false, NULL); // _bs->c1_write_barrier_pre(this, LIR_OprFact::address(addr)); } __ move(data, addr); if (is_obj) { // This address is precise post_barrier(LIR_OprFact::address(addr), data); } } }
void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) { assert(x->number_of_arguments() == 4, "wrong type"); LIRItem obj (x->argument_at(0), this); // object LIRItem offset(x->argument_at(1), this); // offset of field LIRItem cmp (x->argument_at(2), this); // value to compare with field LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp // Use temps to avoid kills LIR_Opr t1 = FrameMap::G1_opr; LIR_Opr t2 = FrameMap::G3_opr; LIR_Opr addr = new_pointer_register(); // get address of field obj.load_item(); offset.load_item(); cmp.load_item(); val.load_item(); __ add(obj.result(), offset.result(), addr); if (type == objectType) { // Write-barrier needed for Object fields. pre_barrier(obj.result(), false, NULL); } if (type == objectType) __ cas_obj(addr, cmp.result(), val.result(), t1, t2); else if (type == intType) __ cas_int(addr, cmp.result(), val.result(), t1, t2); else if (type == longType) __ cas_long(addr, cmp.result(), val.result(), t1, t2); else { ShouldNotReachHere(); } // generate conditional move of boolean result LIR_Opr result = rlock_result(x); __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result); if (type == objectType) { // Write-barrier needed for Object fields. #ifdef PRECISE_CARDMARK post_barrier(addr, val.result()); #else post_barrier(obj.result(), val.result()); #endif // PRECISE_CARDMARK } }
void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) { assert(x->number_of_arguments() == 4, "wrong type"); LIRItem obj (x->argument_at(0), this); // object LIRItem offset(x->argument_at(1), this); // offset of field LIRItem cmp (x->argument_at(2), this); // value to compare with field LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp assert(obj.type()->tag() == objectTag, "invalid type"); // In 64bit the type can be long, sparc doesn't have this assert // assert(offset.type()->tag() == intTag, "invalid type"); assert(cmp.type()->tag() == type->tag(), "invalid type"); assert(val.type()->tag() == type->tag(), "invalid type"); // get address of field obj.load_item(); offset.load_nonconstant(); if (type == objectType) { cmp.load_item_force(FrameMap::rax_oop_opr); val.load_item(); } else if (type == intType) { cmp.load_item_force(FrameMap::rax_opr); val.load_item(); } else if (type == longType) { cmp.load_item_force(FrameMap::long0_opr); val.load_item_force(FrameMap::long1_opr); } else { ShouldNotReachHere(); } LIR_Opr addr = new_pointer_register(); LIR_Address* a; if(offset.result()->is_constant()) { a = new LIR_Address(obj.result(), NOT_LP64(offset.result()->as_constant_ptr()->as_jint()) LP64_ONLY((int)offset.result()->as_constant_ptr()->as_jlong()), as_BasicType(type)); } else { a = new LIR_Address(obj.result(), offset.result(), LIR_Address::times_1, 0, as_BasicType(type)); } __ leal(LIR_OprFact::address(a), addr); if (type == objectType) { // Write-barrier needed for Object fields. // Do the pre-write barrier, if any. pre_barrier(addr, false, NULL); } LIR_Opr ill = LIR_OprFact::illegalOpr; // for convenience if (type == objectType) __ cas_obj(addr, cmp.result(), val.result(), ill, ill); else if (type == intType) __ cas_int(addr, cmp.result(), val.result(), ill, ill); else if (type == longType) __ cas_long(addr, cmp.result(), val.result(), ill, ill); else { ShouldNotReachHere(); } // generate conditional move of boolean result LIR_Opr result = rlock_result(x); __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result, as_BasicType(type)); if (type == objectType) { // Write-barrier needed for Object fields. // Seems to be precise post_barrier(addr, val.result()); } }
void LIRGenerator::increment_counter(address counter, BasicType type, int step) { LIR_Opr pointer = new_pointer_register(); __ move(LIR_OprFact::intptrConst(counter), pointer); LIR_Address* addr = new LIR_Address(pointer, type); increment_counter(addr, step); }