| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #if defined(V8_TARGET_ARCH_X64) |
| |
| #include "bootstrapper.h" |
| #include "code-stubs.h" |
| #include "regexp-macro-assembler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| void ToNumberStub::Generate(MacroAssembler* masm) { |
| // The ToNumber stub takes one argument in eax. |
| Label check_heap_number, call_builtin; |
| __ SmiTest(rax); |
| __ j(not_zero, &check_heap_number, Label::kNear); |
| __ Ret(); |
| |
| __ bind(&check_heap_number); |
| __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| Heap::kHeapNumberMapRootIndex); |
| __ j(not_equal, &call_builtin, Label::kNear); |
| __ Ret(); |
| |
| __ bind(&call_builtin); |
| __ pop(rcx); // Pop return address. |
| __ push(rax); |
| __ push(rcx); // Push return address. |
| __ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION); |
| } |
| |
| |
| void FastNewClosureStub::Generate(MacroAssembler* masm) { |
| // Create a new closure from the given function info in new |
| // space. Set the context to the current context in rsi. |
| Label gc; |
| __ AllocateInNewSpace(JSFunction::kSize, rax, rbx, rcx, &gc, TAG_OBJECT); |
| |
| // Get the function info from the stack. |
| __ movq(rdx, Operand(rsp, 1 * kPointerSize)); |
| |
| int map_index = (language_mode_ == CLASSIC_MODE) |
| ? Context::FUNCTION_MAP_INDEX |
| : Context::STRICT_MODE_FUNCTION_MAP_INDEX; |
| |
| // Compute the function map in the current global context and set that |
| // as the map of the allocated object. |
| __ movq(rcx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| __ movq(rcx, FieldOperand(rcx, GlobalObject::kGlobalContextOffset)); |
| __ movq(rcx, Operand(rcx, Context::SlotOffset(map_index))); |
| __ movq(FieldOperand(rax, JSObject::kMapOffset), rcx); |
| |
| // Initialize the rest of the function. We don't have to update the |
| // write barrier because the allocated object is in new space. |
| __ LoadRoot(rbx, Heap::kEmptyFixedArrayRootIndex); |
| __ LoadRoot(rcx, Heap::kTheHoleValueRootIndex); |
| __ LoadRoot(rdi, Heap::kUndefinedValueRootIndex); |
| __ movq(FieldOperand(rax, JSObject::kPropertiesOffset), rbx); |
| __ movq(FieldOperand(rax, JSObject::kElementsOffset), rbx); |
| __ movq(FieldOperand(rax, JSFunction::kPrototypeOrInitialMapOffset), rcx); |
| __ movq(FieldOperand(rax, JSFunction::kSharedFunctionInfoOffset), rdx); |
| __ movq(FieldOperand(rax, JSFunction::kContextOffset), rsi); |
| __ movq(FieldOperand(rax, JSFunction::kLiteralsOffset), rbx); |
| __ movq(FieldOperand(rax, JSFunction::kNextFunctionLinkOffset), rdi); |
| |
| // Initialize the code pointer in the function to be the one |
| // found in the shared function info object. |
| __ movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset)); |
| __ lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| __ movq(FieldOperand(rax, JSFunction::kCodeEntryOffset), rdx); |
| |
| |
| // Return and remove the on-stack parameter. |
| __ ret(1 * kPointerSize); |
| |
| // Create a new closure through the slower runtime call. |
| __ bind(&gc); |
| __ pop(rcx); // Temporarily remove return address. |
| __ pop(rdx); |
| __ push(rsi); |
| __ push(rdx); |
| __ PushRoot(Heap::kFalseValueRootIndex); |
| __ push(rcx); // Restore return address. |
| __ TailCallRuntime(Runtime::kNewClosure, 3, 1); |
| } |
| |
| |
| void FastNewContextStub::Generate(MacroAssembler* masm) { |
| // Try to allocate the context in new space. |
| Label gc; |
| int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| __ AllocateInNewSpace((length * kPointerSize) + FixedArray::kHeaderSize, |
| rax, rbx, rcx, &gc, TAG_OBJECT); |
| |
| // Get the function from the stack. |
| __ movq(rcx, Operand(rsp, 1 * kPointerSize)); |
| |
| // Set up the object header. |
| __ LoadRoot(kScratchRegister, Heap::kFunctionContextMapRootIndex); |
| __ movq(FieldOperand(rax, HeapObject::kMapOffset), kScratchRegister); |
| __ Move(FieldOperand(rax, FixedArray::kLengthOffset), Smi::FromInt(length)); |
| |
| // Set up the fixed slots. |
| __ Set(rbx, 0); // Set to NULL. |
| __ movq(Operand(rax, Context::SlotOffset(Context::CLOSURE_INDEX)), rcx); |
| __ movq(Operand(rax, Context::SlotOffset(Context::PREVIOUS_INDEX)), rsi); |
| __ movq(Operand(rax, Context::SlotOffset(Context::EXTENSION_INDEX)), rbx); |
| |
| // Copy the global object from the previous context. |
| __ movq(rbx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| __ movq(Operand(rax, Context::SlotOffset(Context::GLOBAL_INDEX)), rbx); |
| |
| // Initialize the rest of the slots to undefined. |
| __ LoadRoot(rbx, Heap::kUndefinedValueRootIndex); |
| for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
| __ movq(Operand(rax, Context::SlotOffset(i)), rbx); |
| } |
| |
| // Return and remove the on-stack parameter. |
| __ movq(rsi, rax); |
| __ ret(1 * kPointerSize); |
| |
| // Need to collect. Call into runtime system. |
| __ bind(&gc); |
| __ TailCallRuntime(Runtime::kNewFunctionContext, 1, 1); |
| } |
| |
| |
| void FastNewBlockContextStub::Generate(MacroAssembler* masm) { |
| // Stack layout on entry: |
| // |
| // [rsp + (1 * kPointerSize)]: function |
| // [rsp + (2 * kPointerSize)]: serialized scope info |
| |
| // Try to allocate the context in new space. |
| Label gc; |
| int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| __ AllocateInNewSpace(FixedArray::SizeFor(length), |
| rax, rbx, rcx, &gc, TAG_OBJECT); |
| |
| // Get the function from the stack. |
| __ movq(rcx, Operand(rsp, 1 * kPointerSize)); |
| |
| // Get the serialized scope info from the stack. |
| __ movq(rbx, Operand(rsp, 2 * kPointerSize)); |
| |
| // Set up the object header. |
| __ LoadRoot(kScratchRegister, Heap::kBlockContextMapRootIndex); |
| __ movq(FieldOperand(rax, HeapObject::kMapOffset), kScratchRegister); |
| __ Move(FieldOperand(rax, FixedArray::kLengthOffset), Smi::FromInt(length)); |
| |
| // If this block context is nested in the global context we get a smi |
| // sentinel instead of a function. The block context should get the |
| // canonical empty function of the global context as its closure which |
| // we still have to look up. |
| Label after_sentinel; |
| __ JumpIfNotSmi(rcx, &after_sentinel, Label::kNear); |
| if (FLAG_debug_code) { |
| const char* message = "Expected 0 as a Smi sentinel"; |
| __ cmpq(rcx, Immediate(0)); |
| __ Assert(equal, message); |
| } |
| __ movq(rcx, GlobalObjectOperand()); |
| __ movq(rcx, FieldOperand(rcx, GlobalObject::kGlobalContextOffset)); |
| __ movq(rcx, ContextOperand(rcx, Context::CLOSURE_INDEX)); |
| __ bind(&after_sentinel); |
| |
| // Set up the fixed slots. |
| __ movq(ContextOperand(rax, Context::CLOSURE_INDEX), rcx); |
| __ movq(ContextOperand(rax, Context::PREVIOUS_INDEX), rsi); |
| __ movq(ContextOperand(rax, Context::EXTENSION_INDEX), rbx); |
| |
| // Copy the global object from the previous context. |
| __ movq(rbx, ContextOperand(rsi, Context::GLOBAL_INDEX)); |
| __ movq(ContextOperand(rax, Context::GLOBAL_INDEX), rbx); |
| |
| // Initialize the rest of the slots to the hole value. |
| __ LoadRoot(rbx, Heap::kTheHoleValueRootIndex); |
| for (int i = 0; i < slots_; i++) { |
| __ movq(ContextOperand(rax, i + Context::MIN_CONTEXT_SLOTS), rbx); |
| } |
| |
| // Return and remove the on-stack parameter. |
| __ movq(rsi, rax); |
| __ ret(2 * kPointerSize); |
| |
| // Need to collect. Call into runtime system. |
| __ bind(&gc); |
| __ TailCallRuntime(Runtime::kPushBlockContext, 2, 1); |
| } |
| |
| |
| static void GenerateFastCloneShallowArrayCommon( |
| MacroAssembler* masm, |
| int length, |
| FastCloneShallowArrayStub::Mode mode, |
| Label* fail) { |
| // Registers on entry: |
| // |
| // rcx: boilerplate literal array. |
| ASSERT(mode != FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS); |
| |
| // All sizes here are multiples of kPointerSize. |
| int elements_size = 0; |
| if (length > 0) { |
| elements_size = mode == FastCloneShallowArrayStub::CLONE_DOUBLE_ELEMENTS |
| ? FixedDoubleArray::SizeFor(length) |
| : FixedArray::SizeFor(length); |
| } |
| int size = JSArray::kSize + elements_size; |
| |
| // Allocate both the JS array and the elements array in one big |
| // allocation. This avoids multiple limit checks. |
| __ AllocateInNewSpace(size, rax, rbx, rdx, fail, TAG_OBJECT); |
| |
| // Copy the JS array part. |
| for (int i = 0; i < JSArray::kSize; i += kPointerSize) { |
| if ((i != JSArray::kElementsOffset) || (length == 0)) { |
| __ movq(rbx, FieldOperand(rcx, i)); |
| __ movq(FieldOperand(rax, i), rbx); |
| } |
| } |
| |
| if (length > 0) { |
| // Get hold of the elements array of the boilerplate and setup the |
| // elements pointer in the resulting object. |
| __ movq(rcx, FieldOperand(rcx, JSArray::kElementsOffset)); |
| __ lea(rdx, Operand(rax, JSArray::kSize)); |
| __ movq(FieldOperand(rax, JSArray::kElementsOffset), rdx); |
| |
| // Copy the elements array. |
| if (mode == FastCloneShallowArrayStub::CLONE_ELEMENTS) { |
| for (int i = 0; i < elements_size; i += kPointerSize) { |
| __ movq(rbx, FieldOperand(rcx, i)); |
| __ movq(FieldOperand(rdx, i), rbx); |
| } |
| } else { |
| ASSERT(mode == FastCloneShallowArrayStub::CLONE_DOUBLE_ELEMENTS); |
| int i; |
| for (i = 0; i < FixedDoubleArray::kHeaderSize; i += kPointerSize) { |
| __ movq(rbx, FieldOperand(rcx, i)); |
| __ movq(FieldOperand(rdx, i), rbx); |
| } |
| while (i < elements_size) { |
| __ movsd(xmm0, FieldOperand(rcx, i)); |
| __ movsd(FieldOperand(rdx, i), xmm0); |
| i += kDoubleSize; |
| } |
| ASSERT(i == elements_size); |
| } |
| } |
| } |
| |
| void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) { |
| // Stack layout on entry: |
| // |
| // [rsp + kPointerSize]: constant elements. |
| // [rsp + (2 * kPointerSize)]: literal index. |
| // [rsp + (3 * kPointerSize)]: literals array. |
| |
| // Load boilerplate object into rcx and check if we need to create a |
| // boilerplate. |
| __ movq(rcx, Operand(rsp, 3 * kPointerSize)); |
| __ movq(rax, Operand(rsp, 2 * kPointerSize)); |
| SmiIndex index = masm->SmiToIndex(rax, rax, kPointerSizeLog2); |
| __ movq(rcx, |
| FieldOperand(rcx, index.reg, index.scale, FixedArray::kHeaderSize)); |
| __ CompareRoot(rcx, Heap::kUndefinedValueRootIndex); |
| Label slow_case; |
| __ j(equal, &slow_case); |
| |
| FastCloneShallowArrayStub::Mode mode = mode_; |
| // rcx is boilerplate object. |
| Factory* factory = masm->isolate()->factory(); |
| if (mode == CLONE_ANY_ELEMENTS) { |
| Label double_elements, check_fast_elements; |
| __ movq(rbx, FieldOperand(rcx, JSArray::kElementsOffset)); |
| __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset), |
| factory->fixed_cow_array_map()); |
| __ j(not_equal, &check_fast_elements); |
| GenerateFastCloneShallowArrayCommon(masm, 0, |
| COPY_ON_WRITE_ELEMENTS, &slow_case); |
| __ ret(3 * kPointerSize); |
| |
| __ bind(&check_fast_elements); |
| __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset), |
| factory->fixed_array_map()); |
| __ j(not_equal, &double_elements); |
| GenerateFastCloneShallowArrayCommon(masm, length_, |
| CLONE_ELEMENTS, &slow_case); |
| __ ret(3 * kPointerSize); |
| |
| __ bind(&double_elements); |
| mode = CLONE_DOUBLE_ELEMENTS; |
| // Fall through to generate the code to handle double elements. |
| } |
| |
| if (FLAG_debug_code) { |
| const char* message; |
| Heap::RootListIndex expected_map_index; |
| if (mode == CLONE_ELEMENTS) { |
| message = "Expected (writable) fixed array"; |
| expected_map_index = Heap::kFixedArrayMapRootIndex; |
| } else if (mode == CLONE_DOUBLE_ELEMENTS) { |
| message = "Expected (writable) fixed double array"; |
| expected_map_index = Heap::kFixedDoubleArrayMapRootIndex; |
| } else { |
| ASSERT(mode == COPY_ON_WRITE_ELEMENTS); |
| message = "Expected copy-on-write fixed array"; |
| expected_map_index = Heap::kFixedCOWArrayMapRootIndex; |
| } |
| __ push(rcx); |
| __ movq(rcx, FieldOperand(rcx, JSArray::kElementsOffset)); |
| __ CompareRoot(FieldOperand(rcx, HeapObject::kMapOffset), |
| expected_map_index); |
| __ Assert(equal, message); |
| __ pop(rcx); |
| } |
| |
| GenerateFastCloneShallowArrayCommon(masm, length_, mode, &slow_case); |
| __ ret(3 * kPointerSize); |
| |
| __ bind(&slow_case); |
| __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1); |
| } |
| |
| |
| void FastCloneShallowObjectStub::Generate(MacroAssembler* masm) { |
| // Stack layout on entry: |
| // |
| // [rsp + kPointerSize]: object literal flags. |
| // [rsp + (2 * kPointerSize)]: constant properties. |
| // [rsp + (3 * kPointerSize)]: literal index. |
| // [rsp + (4 * kPointerSize)]: literals array. |
| |
| // Load boilerplate object into ecx and check if we need to create a |
| // boilerplate. |
| Label slow_case; |
| __ movq(rcx, Operand(rsp, 4 * kPointerSize)); |
| __ movq(rax, Operand(rsp, 3 * kPointerSize)); |
| SmiIndex index = masm->SmiToIndex(rax, rax, kPointerSizeLog2); |
| __ movq(rcx, |
| FieldOperand(rcx, index.reg, index.scale, FixedArray::kHeaderSize)); |
| __ CompareRoot(rcx, Heap::kUndefinedValueRootIndex); |
| __ j(equal, &slow_case); |
| |
| // Check that the boilerplate contains only fast properties and we can |
| // statically determine the instance size. |
| int size = JSObject::kHeaderSize + length_ * kPointerSize; |
| __ movq(rax, FieldOperand(rcx, HeapObject::kMapOffset)); |
| __ movzxbq(rax, FieldOperand(rax, Map::kInstanceSizeOffset)); |
| __ cmpq(rax, Immediate(size >> kPointerSizeLog2)); |
| __ j(not_equal, &slow_case); |
| |
| // Allocate the JS object and copy header together with all in-object |
| // properties from the boilerplate. |
| __ AllocateInNewSpace(size, rax, rbx, rdx, &slow_case, TAG_OBJECT); |
| for (int i = 0; i < size; i += kPointerSize) { |
| __ movq(rbx, FieldOperand(rcx, i)); |
| __ movq(FieldOperand(rax, i), rbx); |
| } |
| |
| // Return and remove the on-stack parameters. |
| __ ret(4 * kPointerSize); |
| |
| __ bind(&slow_case); |
| __ TailCallRuntime(Runtime::kCreateObjectLiteralShallow, 4, 1); |
| } |
| |
| |
| // The stub expects its argument on the stack and returns its result in tos_: |
| // zero for false, and a non-zero value for true. |
| void ToBooleanStub::Generate(MacroAssembler* masm) { |
| // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| // we cannot call anything that could cause a GC from this stub. |
| Label patch; |
| const Register argument = rax; |
| const Register map = rdx; |
| |
| if (!types_.IsEmpty()) { |
| __ movq(argument, Operand(rsp, 1 * kPointerSize)); |
| } |
| |
| // undefined -> false |
| CheckOddball(masm, UNDEFINED, Heap::kUndefinedValueRootIndex, false); |
| |
| // Boolean -> its value |
| CheckOddball(masm, BOOLEAN, Heap::kFalseValueRootIndex, false); |
| CheckOddball(masm, BOOLEAN, Heap::kTrueValueRootIndex, true); |
| |
| // 'null' -> false. |
| CheckOddball(masm, NULL_TYPE, Heap::kNullValueRootIndex, false); |
| |
| if (types_.Contains(SMI)) { |
| // Smis: 0 -> false, all other -> true |
| Label not_smi; |
| __ JumpIfNotSmi(argument, ¬_smi, Label::kNear); |
| // argument contains the correct return value already |
| if (!tos_.is(argument)) { |
| __ movq(tos_, argument); |
| } |
| __ ret(1 * kPointerSize); |
| __ bind(¬_smi); |
| } else if (types_.NeedsMap()) { |
| // If we need a map later and have a Smi -> patch. |
| __ JumpIfSmi(argument, &patch, Label::kNear); |
| } |
| |
| if (types_.NeedsMap()) { |
| __ movq(map, FieldOperand(argument, HeapObject::kMapOffset)); |
| |
| if (types_.CanBeUndetectable()) { |
| __ testb(FieldOperand(map, Map::kBitFieldOffset), |
| Immediate(1 << Map::kIsUndetectable)); |
| // Undetectable -> false. |
| Label not_undetectable; |
| __ j(zero, ¬_undetectable, Label::kNear); |
| __ Set(tos_, 0); |
| __ ret(1 * kPointerSize); |
| __ bind(¬_undetectable); |
| } |
| } |
| |
| if (types_.Contains(SPEC_OBJECT)) { |
| // spec object -> true. |
| Label not_js_object; |
| __ CmpInstanceType(map, FIRST_SPEC_OBJECT_TYPE); |
| __ j(below, ¬_js_object, Label::kNear); |
| // argument contains the correct return value already. |
| if (!tos_.is(argument)) { |
| __ Set(tos_, 1); |
| } |
| __ ret(1 * kPointerSize); |
| __ bind(¬_js_object); |
| } |
| |
| if (types_.Contains(STRING)) { |
| // String value -> false iff empty. |
| Label not_string; |
| __ CmpInstanceType(map, FIRST_NONSTRING_TYPE); |
| __ j(above_equal, ¬_string, Label::kNear); |
| __ movq(tos_, FieldOperand(argument, String::kLengthOffset)); |
| __ ret(1 * kPointerSize); // the string length is OK as the return value |
| __ bind(¬_string); |
| } |
| |
| if (types_.Contains(HEAP_NUMBER)) { |
| // heap number -> false iff +0, -0, or NaN. |
| Label not_heap_number, false_result; |
| __ CompareRoot(map, Heap::kHeapNumberMapRootIndex); |
| __ j(not_equal, ¬_heap_number, Label::kNear); |
| __ xorps(xmm0, xmm0); |
| __ ucomisd(xmm0, FieldOperand(argument, HeapNumber::kValueOffset)); |
| __ j(zero, &false_result, Label::kNear); |
| // argument contains the correct return value already. |
| if (!tos_.is(argument)) { |
| __ Set(tos_, 1); |
| } |
| __ ret(1 * kPointerSize); |
| __ bind(&false_result); |
| __ Set(tos_, 0); |
| __ ret(1 * kPointerSize); |
| __ bind(¬_heap_number); |
| } |
| |
| __ bind(&patch); |
| GenerateTypeTransition(masm); |
| } |
| |
| |
| void StoreBufferOverflowStub::Generate(MacroAssembler* masm) { |
| __ PushCallerSaved(save_doubles_); |
| const int argument_count = 1; |
| __ PrepareCallCFunction(argument_count); |
| #ifdef _WIN64 |
| __ LoadAddress(rcx, ExternalReference::isolate_address()); |
| #else |
| __ LoadAddress(rdi, ExternalReference::isolate_address()); |
| #endif |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ CallCFunction( |
| ExternalReference::store_buffer_overflow_function(masm->isolate()), |
| argument_count); |
| __ PopCallerSaved(save_doubles_); |
| __ ret(0); |
| } |
| |
| |
| void ToBooleanStub::CheckOddball(MacroAssembler* masm, |
| Type type, |
| Heap::RootListIndex value, |
| bool result) { |
| const Register argument = rax; |
| if (types_.Contains(type)) { |
| // If we see an expected oddball, return its ToBoolean value tos_. |
| Label different_value; |
| __ CompareRoot(argument, value); |
| __ j(not_equal, &different_value, Label::kNear); |
| if (!result) { |
| // If we have to return zero, there is no way around clearing tos_. |
| __ Set(tos_, 0); |
| } else if (!tos_.is(argument)) { |
| // If we have to return non-zero, we can re-use the argument if it is the |
| // same register as the result, because we never see Smi-zero here. |
| __ Set(tos_, 1); |
| } |
| __ ret(1 * kPointerSize); |
| __ bind(&different_value); |
| } |
| } |
| |
| |
| void ToBooleanStub::GenerateTypeTransition(MacroAssembler* masm) { |
| __ pop(rcx); // Get return address, operand is now on top of stack. |
| __ Push(Smi::FromInt(tos_.code())); |
| __ Push(Smi::FromInt(types_.ToByte())); |
| __ push(rcx); // Push return address. |
| // Patch the caller to an appropriate specialized stub and return the |
| // operation result to the caller of the stub. |
| __ TailCallExternalReference( |
| ExternalReference(IC_Utility(IC::kToBoolean_Patch), masm->isolate()), |
| 3, |
| 1); |
| } |
| |
| |
| class FloatingPointHelper : public AllStatic { |
| public: |
| // Load the operands from rdx and rax into xmm0 and xmm1, as doubles. |
| // If the operands are not both numbers, jump to not_numbers. |
| // Leaves rdx and rax unchanged. SmiOperands assumes both are smis. |
| // NumberOperands assumes both are smis or heap numbers. |
| static void LoadSSE2SmiOperands(MacroAssembler* masm); |
| static void LoadSSE2NumberOperands(MacroAssembler* masm); |
| static void LoadSSE2UnknownOperands(MacroAssembler* masm, |
| Label* not_numbers); |
| |
| // Takes the operands in rdx and rax and loads them as integers in rax |
| // and rcx. |
| static void LoadAsIntegers(MacroAssembler* masm, |
| Label* operand_conversion_failure, |
| Register heap_number_map); |
| // As above, but we know the operands to be numbers. In that case, |
| // conversion can't fail. |
| static void LoadNumbersAsIntegers(MacroAssembler* masm); |
| |
| // Tries to convert two values to smis losslessly. |
| // This fails if either argument is not a Smi nor a HeapNumber, |
| // or if it's a HeapNumber with a value that can't be converted |
| // losslessly to a Smi. In that case, control transitions to the |
| // on_not_smis label. |
| // On success, either control goes to the on_success label (if one is |
| // provided), or it falls through at the end of the code (if on_success |
| // is NULL). |
| // On success, both first and second holds Smi tagged values. |
| // One of first or second must be non-Smi when entering. |
| static void NumbersToSmis(MacroAssembler* masm, |
| Register first, |
| Register second, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Label* on_success, |
| Label* on_not_smis); |
| }; |
| |
| |
| // Get the integer part of a heap number. |
| // Overwrites the contents of rdi, rbx and rcx. Result cannot be rdi or rbx. |
| void IntegerConvert(MacroAssembler* masm, |
| Register result, |
| Register source) { |
| // Result may be rcx. If result and source are the same register, source will |
| // be overwritten. |
| ASSERT(!result.is(rdi) && !result.is(rbx)); |
| // TODO(lrn): When type info reaches here, if value is a 32-bit integer, use |
| // cvttsd2si (32-bit version) directly. |
| Register double_exponent = rbx; |
| Register double_value = rdi; |
| Label done, exponent_63_plus; |
| // Get double and extract exponent. |
| __ movq(double_value, FieldOperand(source, HeapNumber::kValueOffset)); |
| // Clear result preemptively, in case we need to return zero. |
| __ xorl(result, result); |
| __ movq(xmm0, double_value); // Save copy in xmm0 in case we need it there. |
| // Double to remove sign bit, shift exponent down to least significant bits. |
| // and subtract bias to get the unshifted, unbiased exponent. |
| __ lea(double_exponent, Operand(double_value, double_value, times_1, 0)); |
| __ shr(double_exponent, Immediate(64 - HeapNumber::kExponentBits)); |
| __ subl(double_exponent, Immediate(HeapNumber::kExponentBias)); |
| // Check whether the exponent is too big for a 63 bit unsigned integer. |
| __ cmpl(double_exponent, Immediate(63)); |
| __ j(above_equal, &exponent_63_plus, Label::kNear); |
| // Handle exponent range 0..62. |
| __ cvttsd2siq(result, xmm0); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&exponent_63_plus); |
| // Exponent negative or 63+. |
| __ cmpl(double_exponent, Immediate(83)); |
| // If exponent negative or above 83, number contains no significant bits in |
| // the range 0..2^31, so result is zero, and rcx already holds zero. |
| __ j(above, &done, Label::kNear); |
| |
| // Exponent in rage 63..83. |
| // Mantissa * 2^exponent contains bits in the range 2^0..2^31, namely |
| // the least significant exponent-52 bits. |
| |
| // Negate low bits of mantissa if value is negative. |
| __ addq(double_value, double_value); // Move sign bit to carry. |
| __ sbbl(result, result); // And convert carry to -1 in result register. |
| // if scratch2 is negative, do (scratch2-1)^-1, otherwise (scratch2-0)^0. |
| __ addl(double_value, result); |
| // Do xor in opposite directions depending on where we want the result |
| // (depending on whether result is rcx or not). |
| |
| if (result.is(rcx)) { |
| __ xorl(double_value, result); |
| // Left shift mantissa by (exponent - mantissabits - 1) to save the |
| // bits that have positional values below 2^32 (the extra -1 comes from the |
| // doubling done above to move the sign bit into the carry flag). |
| __ leal(rcx, Operand(double_exponent, -HeapNumber::kMantissaBits - 1)); |
| __ shll_cl(double_value); |
| __ movl(result, double_value); |
| } else { |
| // As the then-branch, but move double-value to result before shifting. |
| __ xorl(result, double_value); |
| __ leal(rcx, Operand(double_exponent, -HeapNumber::kMantissaBits - 1)); |
| __ shll_cl(result); |
| } |
| |
| __ bind(&done); |
| } |
| |
| |
| void UnaryOpStub::Generate(MacroAssembler* masm) { |
| switch (operand_type_) { |
| case UnaryOpIC::UNINITIALIZED: |
| GenerateTypeTransition(masm); |
| break; |
| case UnaryOpIC::SMI: |
| GenerateSmiStub(masm); |
| break; |
| case UnaryOpIC::HEAP_NUMBER: |
| GenerateHeapNumberStub(masm); |
| break; |
| case UnaryOpIC::GENERIC: |
| GenerateGenericStub(masm); |
| break; |
| } |
| } |
| |
| |
| void UnaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| __ pop(rcx); // Save return address. |
| |
| __ push(rax); // the operand |
| __ Push(Smi::FromInt(op_)); |
| __ Push(Smi::FromInt(mode_)); |
| __ Push(Smi::FromInt(operand_type_)); |
| |
| __ push(rcx); // Push return address. |
| |
| // Patch the caller to an appropriate specialized stub and return the |
| // operation result to the caller of the stub. |
| __ TailCallExternalReference( |
| ExternalReference(IC_Utility(IC::kUnaryOp_Patch), masm->isolate()), 4, 1); |
| } |
| |
| |
| // TODO(svenpanne): Use virtual functions instead of switch. |
| void UnaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
| switch (op_) { |
| case Token::SUB: |
| GenerateSmiStubSub(masm); |
| break; |
| case Token::BIT_NOT: |
| GenerateSmiStubBitNot(masm); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void UnaryOpStub::GenerateSmiStubSub(MacroAssembler* masm) { |
| Label slow; |
| GenerateSmiCodeSub(masm, &slow, &slow, Label::kNear, Label::kNear); |
| __ bind(&slow); |
| GenerateTypeTransition(masm); |
| } |
| |
| |
| void UnaryOpStub::GenerateSmiStubBitNot(MacroAssembler* masm) { |
| Label non_smi; |
| GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear); |
| __ bind(&non_smi); |
| GenerateTypeTransition(masm); |
| } |
| |
| |
| void UnaryOpStub::GenerateSmiCodeSub(MacroAssembler* masm, |
| Label* non_smi, |
| Label* slow, |
| Label::Distance non_smi_near, |
| Label::Distance slow_near) { |
| Label done; |
| __ JumpIfNotSmi(rax, non_smi, non_smi_near); |
| __ SmiNeg(rax, rax, &done, Label::kNear); |
| __ jmp(slow, slow_near); |
| __ bind(&done); |
| __ ret(0); |
| } |
| |
| |
| void UnaryOpStub::GenerateSmiCodeBitNot(MacroAssembler* masm, |
| Label* non_smi, |
| Label::Distance non_smi_near) { |
| __ JumpIfNotSmi(rax, non_smi, non_smi_near); |
| __ SmiNot(rax, rax); |
| __ ret(0); |
| } |
| |
| |
| // TODO(svenpanne): Use virtual functions instead of switch. |
| void UnaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
| switch (op_) { |
| case Token::SUB: |
| GenerateHeapNumberStubSub(masm); |
| break; |
| case Token::BIT_NOT: |
| GenerateHeapNumberStubBitNot(masm); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void UnaryOpStub::GenerateHeapNumberStubSub(MacroAssembler* masm) { |
| Label non_smi, slow, call_builtin; |
| GenerateSmiCodeSub(masm, &non_smi, &call_builtin, Label::kNear); |
| __ bind(&non_smi); |
| GenerateHeapNumberCodeSub(masm, &slow); |
| __ bind(&slow); |
| GenerateTypeTransition(masm); |
| __ bind(&call_builtin); |
| GenerateGenericCodeFallback(masm); |
| } |
| |
| |
| void UnaryOpStub::GenerateHeapNumberStubBitNot( |
| MacroAssembler* masm) { |
| Label non_smi, slow; |
| GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear); |
| __ bind(&non_smi); |
| GenerateHeapNumberCodeBitNot(masm, &slow); |
| __ bind(&slow); |
| GenerateTypeTransition(masm); |
| } |
| |
| |
| void UnaryOpStub::GenerateHeapNumberCodeSub(MacroAssembler* masm, |
| Label* slow) { |
| // Check if the operand is a heap number. |
| __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| Heap::kHeapNumberMapRootIndex); |
| __ j(not_equal, slow); |
| |
| // Operand is a float, negate its value by flipping the sign bit. |
| if (mode_ == UNARY_OVERWRITE) { |
| __ Set(kScratchRegister, 0x01); |
| __ shl(kScratchRegister, Immediate(63)); |
| __ xor_(FieldOperand(rax, HeapNumber::kValueOffset), kScratchRegister); |
| } else { |
| // Allocate a heap number before calculating the answer, |
| // so we don't have an untagged double around during GC. |
| Label slow_allocate_heapnumber, heapnumber_allocated; |
| __ AllocateHeapNumber(rcx, rbx, &slow_allocate_heapnumber); |
| __ jmp(&heapnumber_allocated); |
| |
| __ bind(&slow_allocate_heapnumber); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ push(rax); |
| __ CallRuntime(Runtime::kNumberAlloc, 0); |
| __ movq(rcx, rax); |
| __ pop(rax); |
| } |
| __ bind(&heapnumber_allocated); |
| // rcx: allocated 'empty' number |
| |
| // Copy the double value to the new heap number, flipping the sign. |
| __ movq(rdx, FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ Set(kScratchRegister, 0x01); |
| __ shl(kScratchRegister, Immediate(63)); |
| __ xor_(rdx, kScratchRegister); // Flip sign. |
| __ movq(FieldOperand(rcx, HeapNumber::kValueOffset), rdx); |
| __ movq(rax, rcx); |
| } |
| __ ret(0); |
| } |
| |
| |
| void UnaryOpStub::GenerateHeapNumberCodeBitNot(MacroAssembler* masm, |
| Label* slow) { |
| // Check if the operand is a heap number. |
| __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| Heap::kHeapNumberMapRootIndex); |
| __ j(not_equal, slow); |
| |
| // Convert the heap number in rax to an untagged integer in rcx. |
| IntegerConvert(masm, rax, rax); |
| |
| // Do the bitwise operation and smi tag the result. |
| __ notl(rax); |
| __ Integer32ToSmi(rax, rax); |
| __ ret(0); |
| } |
| |
| |
| // TODO(svenpanne): Use virtual functions instead of switch. |
| void UnaryOpStub::GenerateGenericStub(MacroAssembler* masm) { |
| switch (op_) { |
| case Token::SUB: |
| GenerateGenericStubSub(masm); |
| break; |
| case Token::BIT_NOT: |
| GenerateGenericStubBitNot(masm); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void UnaryOpStub::GenerateGenericStubSub(MacroAssembler* masm) { |
| Label non_smi, slow; |
| GenerateSmiCodeSub(masm, &non_smi, &slow, Label::kNear); |
| __ bind(&non_smi); |
| GenerateHeapNumberCodeSub(masm, &slow); |
| __ bind(&slow); |
| GenerateGenericCodeFallback(masm); |
| } |
| |
| |
| void UnaryOpStub::GenerateGenericStubBitNot(MacroAssembler* masm) { |
| Label non_smi, slow; |
| GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear); |
| __ bind(&non_smi); |
| GenerateHeapNumberCodeBitNot(masm, &slow); |
| __ bind(&slow); |
| GenerateGenericCodeFallback(masm); |
| } |
| |
| |
| void UnaryOpStub::GenerateGenericCodeFallback(MacroAssembler* masm) { |
| // Handle the slow case by jumping to the JavaScript builtin. |
| __ pop(rcx); // pop return address |
| __ push(rax); |
| __ push(rcx); // push return address |
| switch (op_) { |
| case Token::SUB: |
| __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION); |
| break; |
| case Token::BIT_NOT: |
| __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_FUNCTION); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void UnaryOpStub::PrintName(StringStream* stream) { |
| const char* op_name = Token::Name(op_); |
| const char* overwrite_name = NULL; // Make g++ happy. |
| switch (mode_) { |
| case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break; |
| } |
| stream->Add("UnaryOpStub_%s_%s_%s", |
| op_name, |
| overwrite_name, |
| UnaryOpIC::GetName(operand_type_)); |
| } |
| |
| |
| void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| __ pop(rcx); // Save return address. |
| __ push(rdx); |
| __ push(rax); |
| // Left and right arguments are now on top. |
| // Push this stub's key. Although the operation and the type info are |
| // encoded into the key, the encoding is opaque, so push them too. |
| __ Push(Smi::FromInt(MinorKey())); |
| __ Push(Smi::FromInt(op_)); |
| __ Push(Smi::FromInt(operands_type_)); |
| |
| __ push(rcx); // Push return address. |
| |
| // Patch the caller to an appropriate specialized stub and return the |
| // operation result to the caller of the stub. |
| __ TailCallExternalReference( |
| ExternalReference(IC_Utility(IC::kBinaryOp_Patch), |
| masm->isolate()), |
| 5, |
| 1); |
| } |
| |
| |
| void BinaryOpStub::Generate(MacroAssembler* masm) { |
| // Explicitly allow generation of nested stubs. It is safe here because |
| // generation code does not use any raw pointers. |
| AllowStubCallsScope allow_stub_calls(masm, true); |
| |
| switch (operands_type_) { |
| case BinaryOpIC::UNINITIALIZED: |
| GenerateTypeTransition(masm); |
| break; |
| case BinaryOpIC::SMI: |
| GenerateSmiStub(masm); |
| break; |
| case BinaryOpIC::INT32: |
| UNREACHABLE(); |
| // The int32 case is identical to the Smi case. We avoid creating this |
| // ic state on x64. |
| break; |
| case BinaryOpIC::HEAP_NUMBER: |
| GenerateHeapNumberStub(masm); |
| break; |
| case BinaryOpIC::ODDBALL: |
| GenerateOddballStub(masm); |
| break; |
| case BinaryOpIC::BOTH_STRING: |
| GenerateBothStringStub(masm); |
| break; |
| case BinaryOpIC::STRING: |
| GenerateStringStub(masm); |
| break; |
| case BinaryOpIC::GENERIC: |
| GenerateGeneric(masm); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void BinaryOpStub::PrintName(StringStream* stream) { |
| const char* op_name = Token::Name(op_); |
| const char* overwrite_name; |
| switch (mode_) { |
| case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| default: overwrite_name = "UnknownOverwrite"; break; |
| } |
| stream->Add("BinaryOpStub_%s_%s_%s", |
| op_name, |
| overwrite_name, |
| BinaryOpIC::GetName(operands_type_)); |
| } |
| |
| |
| void BinaryOpStub::GenerateSmiCode( |
| MacroAssembler* masm, |
| Label* slow, |
| SmiCodeGenerateHeapNumberResults allow_heapnumber_results) { |
| |
| // Arguments to BinaryOpStub are in rdx and rax. |
| Register left = rdx; |
| Register right = rax; |
| |
| // We only generate heapnumber answers for overflowing calculations |
| // for the four basic arithmetic operations and logical right shift by 0. |
| bool generate_inline_heapnumber_results = |
| (allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS) && |
| (op_ == Token::ADD || op_ == Token::SUB || |
| op_ == Token::MUL || op_ == Token::DIV || op_ == Token::SHR); |
| |
| // Smi check of both operands. If op is BIT_OR, the check is delayed |
| // until after the OR operation. |
| Label not_smis; |
| Label use_fp_on_smis; |
| Label fail; |
| |
| if (op_ != Token::BIT_OR) { |
| Comment smi_check_comment(masm, "-- Smi check arguments"); |
| __ JumpIfNotBothSmi(left, right, ¬_smis); |
| } |
| |
| Label smi_values; |
| __ bind(&smi_values); |
| // Perform the operation. |
| Comment perform_smi(masm, "-- Perform smi operation"); |
| switch (op_) { |
| case Token::ADD: |
| ASSERT(right.is(rax)); |
| __ SmiAdd(right, right, left, &use_fp_on_smis); // ADD is commutative. |
| break; |
| |
| case Token::SUB: |
| __ SmiSub(left, left, right, &use_fp_on_smis); |
| __ movq(rax, left); |
| break; |
| |
| case Token::MUL: |
| ASSERT(right.is(rax)); |
| __ SmiMul(right, right, left, &use_fp_on_smis); // MUL is commutative. |
| break; |
| |
| case Token::DIV: |
| // SmiDiv will not accept left in rdx or right in rax. |
| left = rcx; |
| right = rbx; |
| __ movq(rbx, rax); |
| __ movq(rcx, rdx); |
| __ SmiDiv(rax, left, right, &use_fp_on_smis); |
| break; |
| |
| case Token::MOD: |
| // SmiMod will not accept left in rdx or right in rax. |
| left = rcx; |
| right = rbx; |
| __ movq(rbx, rax); |
| __ movq(rcx, rdx); |
| __ SmiMod(rax, left, right, &use_fp_on_smis); |
| break; |
| |
| case Token::BIT_OR: { |
| ASSERT(right.is(rax)); |
| __ SmiOrIfSmis(right, right, left, ¬_smis); // BIT_OR is commutative. |
| break; |
| } |
| case Token::BIT_XOR: |
| ASSERT(right.is(rax)); |
| __ SmiXor(right, right, left); // BIT_XOR is commutative. |
| break; |
| |
| case Token::BIT_AND: |
| ASSERT(right.is(rax)); |
| __ SmiAnd(right, right, left); // BIT_AND is commutative. |
| break; |
| |
| case Token::SHL: |
| __ SmiShiftLeft(left, left, right); |
| __ movq(rax, left); |
| break; |
| |
| case Token::SAR: |
| __ SmiShiftArithmeticRight(left, left, right); |
| __ movq(rax, left); |
| break; |
| |
| case Token::SHR: |
| __ SmiShiftLogicalRight(left, left, right, &use_fp_on_smis); |
| __ movq(rax, left); |
| break; |
| |
| default: |
| UNREACHABLE(); |
| } |
| |
| // 5. Emit return of result in rax. Some operations have registers pushed. |
| __ ret(0); |
| |
| if (use_fp_on_smis.is_linked()) { |
| // 6. For some operations emit inline code to perform floating point |
| // operations on known smis (e.g., if the result of the operation |
| // overflowed the smi range). |
| __ bind(&use_fp_on_smis); |
| if (op_ == Token::DIV || op_ == Token::MOD) { |
| // Restore left and right to rdx and rax. |
| __ movq(rdx, rcx); |
| __ movq(rax, rbx); |
| } |
| |
| if (generate_inline_heapnumber_results) { |
| __ AllocateHeapNumber(rcx, rbx, slow); |
| Comment perform_float(masm, "-- Perform float operation on smis"); |
| if (op_ == Token::SHR) { |
| __ SmiToInteger32(left, left); |
| __ cvtqsi2sd(xmm0, left); |
| } else { |
| FloatingPointHelper::LoadSSE2SmiOperands(masm); |
| switch (op_) { |
| case Token::ADD: __ addsd(xmm0, xmm1); break; |
| case Token::SUB: __ subsd(xmm0, xmm1); break; |
| case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| case Token::DIV: __ divsd(xmm0, xmm1); break; |
| default: UNREACHABLE(); |
| } |
| } |
| __ movsd(FieldOperand(rcx, HeapNumber::kValueOffset), xmm0); |
| __ movq(rax, rcx); |
| __ ret(0); |
| } else { |
| __ jmp(&fail); |
| } |
| } |
| |
| // 7. Non-smi operands reach the end of the code generated by |
| // GenerateSmiCode, and fall through to subsequent code, |
| // with the operands in rdx and rax. |
| // But first we check if non-smi values are HeapNumbers holding |
| // values that could be smi. |
| __ bind(¬_smis); |
| Comment done_comment(masm, "-- Enter non-smi code"); |
| FloatingPointHelper::NumbersToSmis(masm, left, right, rbx, rdi, rcx, |
| &smi_values, &fail); |
| __ jmp(&smi_values); |
| __ bind(&fail); |
| } |
| |
| |
| void BinaryOpStub::GenerateFloatingPointCode(MacroAssembler* masm, |
| Label* allocation_failure, |
| Label* non_numeric_failure) { |
| switch (op_) { |
| case Token::ADD: |
| case Token::SUB: |
| case Token::MUL: |
| case Token::DIV: { |
| FloatingPointHelper::LoadSSE2UnknownOperands(masm, non_numeric_failure); |
| |
| switch (op_) { |
| case Token::ADD: __ addsd(xmm0, xmm1); break; |
| case Token::SUB: __ subsd(xmm0, xmm1); break; |
| case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| case Token::DIV: __ divsd(xmm0, xmm1); break; |
| default: UNREACHABLE(); |
| } |
| GenerateHeapResultAllocation(masm, allocation_failure); |
| __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm0); |
| __ ret(0); |
| break; |
| } |
| case Token::MOD: { |
| // For MOD we jump to the allocation_failure label, to call runtime. |
| __ jmp(allocation_failure); |
| break; |
| } |
| case Token::BIT_OR: |
| case Token::BIT_AND: |
| case Token::BIT_XOR: |
| case Token::SAR: |
| case Token::SHL: |
| case Token::SHR: { |
| Label non_smi_shr_result; |
| Register heap_number_map = r9; |
| __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| FloatingPointHelper::LoadAsIntegers(masm, non_numeric_failure, |
| heap_number_map); |
| switch (op_) { |
| case Token::BIT_OR: __ orl(rax, rcx); break; |
| case Token::BIT_AND: __ andl(rax, rcx); break; |
| case Token::BIT_XOR: __ xorl(rax, rcx); break; |
| case Token::SAR: __ sarl_cl(rax); break; |
| case Token::SHL: __ shll_cl(rax); break; |
| case Token::SHR: { |
| __ shrl_cl(rax); |
| // Check if result is negative. This can only happen for a shift |
| // by zero. |
| __ testl(rax, rax); |
| __ j(negative, &non_smi_shr_result); |
| break; |
| } |
| default: UNREACHABLE(); |
| } |
| STATIC_ASSERT(kSmiValueSize == 32); |
| // Tag smi result and return. |
| __ Integer32ToSmi(rax, rax); |
| __ Ret(); |
| |
| // Logical shift right can produce an unsigned int32 that is not |
| // an int32, and so is not in the smi range. Allocate a heap number |
| // in that case. |
| if (op_ == Token::SHR) { |
| __ bind(&non_smi_shr_result); |
| Label allocation_failed; |
| __ movl(rbx, rax); // rbx holds result value (uint32 value as int64). |
| // Allocate heap number in new space. |
| // Not using AllocateHeapNumber macro in order to reuse |
| // already loaded heap_number_map. |
| __ AllocateInNewSpace(HeapNumber::kSize, |
| rax, |
| rdx, |
| no_reg, |
| &allocation_failed, |
| TAG_OBJECT); |
| // Set the map. |
| if (FLAG_debug_code) { |
| __ AbortIfNotRootValue(heap_number_map, |
| Heap::kHeapNumberMapRootIndex, |
| "HeapNumberMap register clobbered."); |
| } |
| __ movq(FieldOperand(rax, HeapObject::kMapOffset), |
| heap_number_map); |
| __ cvtqsi2sd(xmm0, rbx); |
| __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm0); |
| __ Ret(); |
| |
| __ bind(&allocation_failed); |
| // We need tagged values in rdx and rax for the following code, |
| // not int32 in rax and rcx. |
| __ Integer32ToSmi(rax, rcx); |
| __ Integer32ToSmi(rdx, rbx); |
| __ jmp(allocation_failure); |
| } |
| break; |
| } |
| default: UNREACHABLE(); break; |
| } |
| // No fall-through from this generated code. |
| if (FLAG_debug_code) { |
| __ Abort("Unexpected fall-through in " |
| "BinaryStub::GenerateFloatingPointCode."); |
| } |
| } |
| |
| |
| void BinaryOpStub::GenerateStringAddCode(MacroAssembler* masm) { |
| ASSERT(op_ == Token::ADD); |
| Label left_not_string, call_runtime; |
| |
| // Registers containing left and right operands respectively. |
| Register left = rdx; |
| Register right = rax; |
| |
| // Test if left operand is a string. |
| __ JumpIfSmi(left, &left_not_string, Label::kNear); |
| __ CmpObjectType(left, FIRST_NONSTRING_TYPE, rcx); |
| __ j(above_equal, &left_not_string, Label::kNear); |
| StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB); |
| GenerateRegisterArgsPush(masm); |
| __ TailCallStub(&string_add_left_stub); |
| |
| // Left operand is not a string, test right. |
| __ bind(&left_not_string); |
| __ JumpIfSmi(right, &call_runtime, Label::kNear); |
| __ CmpObjectType(right, FIRST_NONSTRING_TYPE, rcx); |
| __ j(above_equal, &call_runtime, Label::kNear); |
| |
| StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB); |
| GenerateRegisterArgsPush(masm); |
| __ TailCallStub(&string_add_right_stub); |
| |
| // Neither argument is a string. |
| __ bind(&call_runtime); |
| } |
| |
| |
| void BinaryOpStub::GenerateCallRuntimeCode(MacroAssembler* masm) { |
| GenerateRegisterArgsPush(masm); |
| switch (op_) { |
| case Token::ADD: |
| __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| break; |
| case Token::SUB: |
| __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| break; |
| case Token::MUL: |
| __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| break; |
| case Token::DIV: |
| __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| break; |
| case Token::MOD: |
| __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| break; |
| case Token::BIT_OR: |
| __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| break; |
| case Token::BIT_AND: |
| __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| break; |
| case Token::BIT_XOR: |
| __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| break; |
| case Token::SAR: |
| __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| break; |
| case Token::SHL: |
| __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| break; |
| case Token::SHR: |
| __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
| Label call_runtime; |
| if (result_type_ == BinaryOpIC::UNINITIALIZED || |
| result_type_ == BinaryOpIC::SMI) { |
| // Only allow smi results. |
| GenerateSmiCode(masm, NULL, NO_HEAPNUMBER_RESULTS); |
| } else { |
| // Allow heap number result and don't make a transition if a heap number |
| // cannot be allocated. |
| GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| } |
| |
| // Code falls through if the result is not returned as either a smi or heap |
| // number. |
| GenerateTypeTransition(masm); |
| |
| if (call_runtime.is_linked()) { |
| __ bind(&call_runtime); |
| GenerateCallRuntimeCode(masm); |
| } |
| } |
| |
| |
| void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) { |
| ASSERT(operands_type_ == BinaryOpIC::STRING); |
| ASSERT(op_ == Token::ADD); |
| GenerateStringAddCode(masm); |
| // Try to add arguments as strings, otherwise, transition to the generic |
| // BinaryOpIC type. |
| GenerateTypeTransition(masm); |
| } |
| |
| |
| void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) { |
| Label call_runtime; |
| ASSERT(operands_type_ == BinaryOpIC::BOTH_STRING); |
| ASSERT(op_ == Token::ADD); |
| // If both arguments are strings, call the string add stub. |
| // Otherwise, do a transition. |
| |
| // Registers containing left and right operands respectively. |
| Register left = rdx; |
| Register right = rax; |
| |
| // Test if left operand is a string. |
| __ JumpIfSmi(left, &call_runtime); |
| __ CmpObjectType(left, FIRST_NONSTRING_TYPE, rcx); |
| __ j(above_equal, &call_runtime); |
| |
| // Test if right operand is a string. |
| __ JumpIfSmi(right, &call_runtime); |
| __ CmpObjectType(right, FIRST_NONSTRING_TYPE, rcx); |
| __ j(above_equal, &call_runtime); |
| |
| StringAddStub string_add_stub(NO_STRING_CHECK_IN_STUB); |
| GenerateRegisterArgsPush(masm); |
| __ TailCallStub(&string_add_stub); |
| |
| __ bind(&call_runtime); |
| GenerateTypeTransition(masm); |
| } |
| |
| |
| void BinaryOpStub::GenerateOddballStub(MacroAssembler* masm) { |
| Label call_runtime; |
| |
| if (op_ == Token::ADD) { |
| // Handle string addition here, because it is the only operation |
| // that does not do a ToNumber conversion on the operands. |
| GenerateStringAddCode(masm); |
| } |
| |
| // Convert oddball arguments to numbers. |
| Label check, done; |
| __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex); |
| __ j(not_equal, &check, Label::kNear); |
| if (Token::IsBitOp(op_)) { |
| __ xor_(rdx, rdx); |
| } else { |
| __ LoadRoot(rdx, Heap::kNanValueRootIndex); |
| } |
| __ jmp(&done, Label::kNear); |
| __ bind(&check); |
| __ CompareRoot(rax, Heap::kUndefinedValueRootIndex); |
| __ j(not_equal, &done, Label::kNear); |
| if (Token::IsBitOp(op_)) { |
| __ xor_(rax, rax); |
| } else { |
| __ LoadRoot(rax, Heap::kNanValueRootIndex); |
| } |
| __ bind(&done); |
| |
| GenerateHeapNumberStub(masm); |
| } |
| |
| |
| void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
| Label gc_required, not_number; |
| GenerateFloatingPointCode(masm, &gc_required, ¬_number); |
| |
| __ bind(¬_number); |
| GenerateTypeTransition(masm); |
| |
| __ bind(&gc_required); |
| GenerateCallRuntimeCode(masm); |
| } |
| |
| |
| void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) { |
| Label call_runtime, call_string_add_or_runtime; |
| |
| GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| |
| GenerateFloatingPointCode(masm, &call_runtime, &call_string_add_or_runtime); |
| |
| __ bind(&call_string_add_or_runtime); |
| if (op_ == Token::ADD) { |
| GenerateStringAddCode(masm); |
| } |
| |
| __ bind(&call_runtime); |
| GenerateCallRuntimeCode(masm); |
| } |
| |
| |
| void BinaryOpStub::GenerateHeapResultAllocation(MacroAssembler* masm, |
| Label* alloc_failure) { |
| Label skip_allocation; |
| OverwriteMode mode = mode_; |
| switch (mode) { |
| case OVERWRITE_LEFT: { |
| // If the argument in rdx is already an object, we skip the |
| // allocation of a heap number. |
| __ JumpIfNotSmi(rdx, &skip_allocation); |
| // Allocate a heap number for the result. Keep eax and edx intact |
| // for the possible runtime call. |
| __ AllocateHeapNumber(rbx, rcx, alloc_failure); |
| // Now rdx can be overwritten losing one of the arguments as we are |
| // now done and will not need it any more. |
| __ movq(rdx, rbx); |
| __ bind(&skip_allocation); |
| // Use object in rdx as a result holder |
| __ movq(rax, rdx); |
| break; |
| } |
| case OVERWRITE_RIGHT: |
| // If the argument in rax is already an object, we skip the |
| // allocation of a heap number. |
| __ JumpIfNotSmi(rax, &skip_allocation); |
| // Fall through! |
| case NO_OVERWRITE: |
| // Allocate a heap number for the result. Keep rax and rdx intact |
| // for the possible runtime call. |
| __ AllocateHeapNumber(rbx, rcx, alloc_failure); |
| // Now rax can be overwritten losing one of the arguments as we are |
| // now done and will not need it any more. |
| __ movq(rax, rbx); |
| __ bind(&skip_allocation); |
| break; |
| default: UNREACHABLE(); |
| } |
| } |
| |
| |
| void BinaryOpStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
| __ pop(rcx); |
| __ push(rdx); |
| __ push(rax); |
| __ push(rcx); |
| } |
| |
| |
| void TranscendentalCacheStub::Generate(MacroAssembler* masm) { |
| // TAGGED case: |
| // Input: |
| // rsp[8]: argument (should be number). |
| // rsp[0]: return address. |
| // Output: |
| // rax: tagged double result. |
| // UNTAGGED case: |
| // Input:: |
| // rsp[0]: return address. |
| // xmm1: untagged double input argument |
| // Output: |
| // xmm1: untagged double result. |
| |
| Label runtime_call; |
| Label runtime_call_clear_stack; |
| Label skip_cache; |
| const bool tagged = (argument_type_ == TAGGED); |
| if (tagged) { |
| Label input_not_smi, loaded; |
| // Test that rax is a number. |
| __ movq(rax, Operand(rsp, kPointerSize)); |
| __ JumpIfNotSmi(rax, &input_not_smi, Label::kNear); |
| // Input is a smi. Untag and load it onto the FPU stack. |
| // Then load the bits of the double into rbx. |
| __ SmiToInteger32(rax, rax); |
| __ subq(rsp, Immediate(kDoubleSize)); |
| __ cvtlsi2sd(xmm1, rax); |
| __ movsd(Operand(rsp, 0), xmm1); |
| __ movq(rbx, xmm1); |
| __ movq(rdx, xmm1); |
| __ fld_d(Operand(rsp, 0)); |
| __ addq(rsp, Immediate(kDoubleSize)); |
| __ jmp(&loaded, Label::kNear); |
| |
| __ bind(&input_not_smi); |
| // Check if input is a HeapNumber. |
| __ LoadRoot(rbx, Heap::kHeapNumberMapRootIndex); |
| __ cmpq(rbx, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ j(not_equal, &runtime_call); |
| // Input is a HeapNumber. Push it on the FPU stack and load its |
| // bits into rbx. |
| __ fld_d(FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ movq(rbx, FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ movq(rdx, rbx); |
| |
| __ bind(&loaded); |
| } else { // UNTAGGED. |
| __ movq(rbx, xmm1); |
| __ movq(rdx, xmm1); |
| } |
| |
| // ST[0] == double value, if TAGGED. |
| // rbx = bits of double value. |
| // rdx = also bits of double value. |
| // Compute hash (h is 32 bits, bits are 64 and the shifts are arithmetic): |
| // h = h0 = bits ^ (bits >> 32); |
| // h ^= h >> 16; |
| // h ^= h >> 8; |
| // h = h & (cacheSize - 1); |
| // or h = (h0 ^ (h0 >> 8) ^ (h0 >> 16) ^ (h0 >> 24)) & (cacheSize - 1) |
| __ sar(rdx, Immediate(32)); |
| __ xorl(rdx, rbx); |
| __ movl(rcx, rdx); |
| __ movl(rax, rdx); |
| __ movl(rdi, rdx); |
| __ sarl(rdx, Immediate(8)); |
| __ sarl(rcx, Immediate(16)); |
| __ sarl(rax, Immediate(24)); |
| __ xorl(rcx, rdx); |
| __ xorl(rax, rdi); |
| __ xorl(rcx, rax); |
| ASSERT(IsPowerOf2(TranscendentalCache::SubCache::kCacheSize)); |
| __ andl(rcx, Immediate(TranscendentalCache::SubCache::kCacheSize - 1)); |
| |
| // ST[0] == double value. |
| // rbx = bits of double value. |
| // rcx = TranscendentalCache::hash(double value). |
| ExternalReference cache_array = |
| ExternalReference::transcendental_cache_array_address(masm->isolate()); |
| __ movq(rax, cache_array); |
| int cache_array_index = |
| type_ * sizeof(Isolate::Current()->transcendental_cache()->caches_[0]); |
| __ movq(rax, Operand(rax, cache_array_index)); |
| // rax points to the cache for the type type_. |
| // If NULL, the cache hasn't been initialized yet, so go through runtime. |
| __ testq(rax, rax); |
| __ j(zero, &runtime_call_clear_stack); // Only clears stack if TAGGED. |
| #ifdef DEBUG |
| // Check that the layout of cache elements match expectations. |
| { // NOLINT - doesn't like a single brace on a line. |
| TranscendentalCache::SubCache::Element test_elem[2]; |
| char* elem_start = reinterpret_cast<char*>(&test_elem[0]); |
| char* elem2_start = reinterpret_cast<char*>(&test_elem[1]); |
| char* elem_in0 = reinterpret_cast<char*>(&(test_elem[0].in[0])); |
| char* elem_in1 = reinterpret_cast<char*>(&(test_elem[0].in[1])); |
| char* elem_out = reinterpret_cast<char*>(&(test_elem[0].output)); |
| // Two uint_32's and a pointer per element. |
| CHECK_EQ(16, static_cast<int>(elem2_start - elem_start)); |
| CHECK_EQ(0, static_cast<int>(elem_in0 - elem_start)); |
| CHECK_EQ(kIntSize, static_cast<int>(elem_in1 - elem_start)); |
| CHECK_EQ(2 * kIntSize, static_cast<int>(elem_out - elem_start)); |
| } |
| #endif |
| // Find the address of the rcx'th entry in the cache, i.e., &rax[rcx*16]. |
| __ addl(rcx, rcx); |
| __ lea(rcx, Operand(rax, rcx, times_8, 0)); |
| // Check if cache matches: Double value is stored in uint32_t[2] array. |
| Label cache_miss; |
| __ cmpq(rbx, Operand(rcx, 0)); |
| __ j(not_equal, &cache_miss, Label::kNear); |
| // Cache hit! |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->transcendental_cache_hit(), 1); |
| __ movq(rax, Operand(rcx, 2 * kIntSize)); |
| if (tagged) { |
| __ fstp(0); // Clear FPU stack. |
| __ ret(kPointerSize); |
| } else { // UNTAGGED. |
| __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ Ret(); |
| } |
| |
| __ bind(&cache_miss); |
| __ IncrementCounter(counters->transcendental_cache_miss(), 1); |
| // Update cache with new value. |
| if (tagged) { |
| __ AllocateHeapNumber(rax, rdi, &runtime_call_clear_stack); |
| } else { // UNTAGGED. |
| __ AllocateHeapNumber(rax, rdi, &skip_cache); |
| __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm1); |
| __ fld_d(FieldOperand(rax, HeapNumber::kValueOffset)); |
| } |
| GenerateOperation(masm, type_); |
| __ movq(Operand(rcx, 0), rbx); |
| __ movq(Operand(rcx, 2 * kIntSize), rax); |
| __ fstp_d(FieldOperand(rax, HeapNumber::kValueOffset)); |
| if (tagged) { |
| __ ret(kPointerSize); |
| } else { // UNTAGGED. |
| __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ Ret(); |
| |
| // Skip cache and return answer directly, only in untagged case. |
| __ bind(&skip_cache); |
| __ subq(rsp, Immediate(kDoubleSize)); |
| __ movsd(Operand(rsp, 0), xmm1); |
| __ fld_d(Operand(rsp, 0)); |
| GenerateOperation(masm, type_); |
| __ fstp_d(Operand(rsp, 0)); |
| __ movsd(xmm1, Operand(rsp, 0)); |
| __ addq(rsp, Immediate(kDoubleSize)); |
| // We return the value in xmm1 without adding it to the cache, but |
| // we cause a scavenging GC so that future allocations will succeed. |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Allocate an unused object bigger than a HeapNumber. |
| __ Push(Smi::FromInt(2 * kDoubleSize)); |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateInNewSpace); |
| } |
| __ Ret(); |
| } |
| |
| // Call runtime, doing whatever allocation and cleanup is necessary. |
| if (tagged) { |
| __ bind(&runtime_call_clear_stack); |
| __ fstp(0); |
| __ bind(&runtime_call); |
| __ TailCallExternalReference( |
| ExternalReference(RuntimeFunction(), masm->isolate()), 1, 1); |
| } else { // UNTAGGED. |
| __ bind(&runtime_call_clear_stack); |
| __ bind(&runtime_call); |
| __ AllocateHeapNumber(rax, rdi, &skip_cache); |
| __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm1); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ push(rax); |
| __ CallRuntime(RuntimeFunction(), 1); |
| } |
| __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ Ret(); |
| } |
| } |
| |
| |
| Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() { |
| switch (type_) { |
| // Add more cases when necessary. |
| case TranscendentalCache::SIN: return Runtime::kMath_sin; |
| case TranscendentalCache::COS: return Runtime::kMath_cos; |
| case TranscendentalCache::TAN: return Runtime::kMath_tan; |
| case TranscendentalCache::LOG: return Runtime::kMath_log; |
| default: |
| UNIMPLEMENTED(); |
| return Runtime::kAbort; |
| } |
| } |
| |
| |
| void TranscendentalCacheStub::GenerateOperation( |
| MacroAssembler* masm, TranscendentalCache::Type type) { |
| // Registers: |
| // rax: Newly allocated HeapNumber, which must be preserved. |
| // rbx: Bits of input double. Must be preserved. |
| // rcx: Pointer to cache entry. Must be preserved. |
| // st(0): Input double |
| Label done; |
| if (type == TranscendentalCache::SIN || |
| type == TranscendentalCache::COS || |
| type == TranscendentalCache::TAN) { |
| // Both fsin and fcos require arguments in the range +/-2^63 and |
| // return NaN for infinities and NaN. They can share all code except |
| // the actual fsin/fcos operation. |
| Label in_range; |
| // If argument is outside the range -2^63..2^63, fsin/cos doesn't |
| // work. We must reduce it to the appropriate range. |
| __ movq(rdi, rbx); |
| // Move exponent and sign bits to low bits. |
| __ shr(rdi, Immediate(HeapNumber::kMantissaBits)); |
| // Remove sign bit. |
| __ andl(rdi, Immediate((1 << HeapNumber::kExponentBits) - 1)); |
| int supported_exponent_limit = (63 + HeapNumber::kExponentBias); |
| __ cmpl(rdi, Immediate(supported_exponent_limit)); |
| __ j(below, &in_range); |
| // Check for infinity and NaN. Both return NaN for sin. |
| __ cmpl(rdi, Immediate(0x7ff)); |
| Label non_nan_result; |
| __ j(not_equal, &non_nan_result, Label::kNear); |
| // Input is +/-Infinity or NaN. Result is NaN. |
| __ fstp(0); |
| // NaN is represented by 0x7ff8000000000000. |
| __ subq(rsp, Immediate(kPointerSize)); |
| __ movl(Operand(rsp, 4), Immediate(0x7ff80000)); |
| __ movl(Operand(rsp, 0), Immediate(0x00000000)); |
| __ fld_d(Operand(rsp, 0)); |
| __ addq(rsp, Immediate(kPointerSize)); |
| __ jmp(&done); |
| |
| __ bind(&non_nan_result); |
| |
| // Use fpmod to restrict argument to the range +/-2*PI. |
| __ movq(rdi, rax); // Save rax before using fnstsw_ax. |
| __ fldpi(); |
| __ fadd(0); |
| __ fld(1); |
| // FPU Stack: input, 2*pi, input. |
| { |
| Label no_exceptions; |
| __ fwait(); |
| __ fnstsw_ax(); |
| // Clear if Illegal Operand or Zero Division exceptions are set. |
| __ testl(rax, Immediate(5)); // #IO and #ZD flags of FPU status word. |
| __ j(zero, &no_exceptions); |
| __ fnclex(); |
| __ bind(&no_exceptions); |
| } |
| |
| // Compute st(0) % st(1) |
| { |
| Label partial_remainder_loop; |
| __ bind(&partial_remainder_loop); |
| __ fprem1(); |
| __ fwait(); |
| __ fnstsw_ax(); |
| __ testl(rax, Immediate(0x400)); // Check C2 bit of FPU status word. |
| // If C2 is set, computation only has partial result. Loop to |
| // continue computation. |
| __ j(not_zero, &partial_remainder_loop); |
| } |
| // FPU Stack: input, 2*pi, input % 2*pi |
| __ fstp(2); |
| // FPU Stack: input % 2*pi, 2*pi, |
| __ fstp(0); |
| // FPU Stack: input % 2*pi |
| __ movq(rax, rdi); // Restore rax, pointer to the new HeapNumber. |
| __ bind(&in_range); |
| switch (type) { |
| case TranscendentalCache::SIN: |
| __ fsin(); |
| break; |
| case TranscendentalCache::COS: |
| __ fcos(); |
| break; |
| case TranscendentalCache::TAN: |
| // FPTAN calculates tangent onto st(0) and pushes 1.0 onto the |
| // FP register stack. |
| __ fptan(); |
| __ fstp(0); // Pop FP register stack. |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| __ bind(&done); |
| } else { |
| ASSERT(type == TranscendentalCache::LOG); |
| __ fldln2(); |
| __ fxch(); |
| __ fyl2x(); |
| } |
| } |
| |
| |
| // Input: rdx, rax are the left and right objects of a bit op. |
| // Output: rax, rcx are left and right integers for a bit op. |
| void FloatingPointHelper::LoadNumbersAsIntegers(MacroAssembler* masm) { |
| // Check float operands. |
| Label done; |
| Label rax_is_smi; |
| Label rax_is_object; |
| Label rdx_is_object; |
| |
| __ JumpIfNotSmi(rdx, &rdx_is_object); |
| __ SmiToInteger32(rdx, rdx); |
| __ JumpIfSmi(rax, &rax_is_smi); |
| |
| __ bind(&rax_is_object); |
| IntegerConvert(masm, rcx, rax); // Uses rdi, rcx and rbx. |
| __ jmp(&done); |
| |
| __ bind(&rdx_is_object); |
| IntegerConvert(masm, rdx, rdx); // Uses rdi, rcx and rbx. |
| __ JumpIfNotSmi(rax, &rax_is_object); |
| __ bind(&rax_is_smi); |
| __ SmiToInteger32(rcx, rax); |
| |
| __ bind(&done); |
| __ movl(rax, rdx); |
| } |
| |
| |
| // Input: rdx, rax are the left and right objects of a bit op. |
| // Output: rax, rcx are left and right integers for a bit op. |
| // Jump to conversion_failure: rdx and rax are unchanged. |
| void FloatingPointHelper::LoadAsIntegers(MacroAssembler* masm, |
| Label* conversion_failure, |
| Register heap_number_map) { |
| // Check float operands. |
| Label arg1_is_object, check_undefined_arg1; |
| Label arg2_is_object, check_undefined_arg2; |
| Label load_arg2, done; |
| |
| __ JumpIfNotSmi(rdx, &arg1_is_object); |
| __ SmiToInteger32(r8, rdx); |
| __ jmp(&load_arg2); |
| |
| // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| __ bind(&check_undefined_arg1); |
| __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex); |
| __ j(not_equal, conversion_failure); |
| __ Set(r8, 0); |
| __ jmp(&load_arg2); |
| |
| __ bind(&arg1_is_object); |
| __ cmpq(FieldOperand(rdx, HeapObject::kMapOffset), heap_number_map); |
| __ j(not_equal, &check_undefined_arg1); |
| // Get the untagged integer version of the rdx heap number in rcx. |
| IntegerConvert(masm, r8, rdx); |
| |
| // Here r8 has the untagged integer, rax has a Smi or a heap number. |
| __ bind(&load_arg2); |
| // Test if arg2 is a Smi. |
| __ JumpIfNotSmi(rax, &arg2_is_object); |
| __ SmiToInteger32(rcx, rax); |
| __ jmp(&done); |
| |
| // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| __ bind(&check_undefined_arg2); |
| __ CompareRoot(rax, Heap::kUndefinedValueRootIndex); |
| __ j(not_equal, conversion_failure); |
| __ Set(rcx, 0); |
| __ jmp(&done); |
| |
| __ bind(&arg2_is_object); |
| __ cmpq(FieldOperand(rax, HeapObject::kMapOffset), heap_number_map); |
| __ j(not_equal, &check_undefined_arg2); |
| // Get the untagged integer version of the rax heap number in rcx. |
| IntegerConvert(masm, rcx, rax); |
| __ bind(&done); |
| __ movl(rax, r8); |
| } |
| |
| |
| void FloatingPointHelper::LoadSSE2SmiOperands(MacroAssembler* masm) { |
| __ SmiToInteger32(kScratchRegister, rdx); |
| __ cvtlsi2sd(xmm0, kScratchRegister); |
| __ SmiToInteger32(kScratchRegister, rax); |
| __ cvtlsi2sd(xmm1, kScratchRegister); |
| } |
| |
| |
| void FloatingPointHelper::LoadSSE2NumberOperands(MacroAssembler* masm) { |
| Label load_smi_rdx, load_nonsmi_rax, load_smi_rax, done; |
| // Load operand in rdx into xmm0. |
| __ JumpIfSmi(rdx, &load_smi_rdx); |
| __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| // Load operand in rax into xmm1. |
| __ JumpIfSmi(rax, &load_smi_rax); |
| __ bind(&load_nonsmi_rax); |
| __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ jmp(&done); |
| |
| __ bind(&load_smi_rdx); |
| __ SmiToInteger32(kScratchRegister, rdx); |
| __ cvtlsi2sd(xmm0, kScratchRegister); |
| __ JumpIfNotSmi(rax, &load_nonsmi_rax); |
| |
| __ bind(&load_smi_rax); |
| __ SmiToInteger32(kScratchRegister, rax); |
| __ cvtlsi2sd(xmm1, kScratchRegister); |
| |
| __ bind(&done); |
| } |
| |
| |
| void FloatingPointHelper::LoadSSE2UnknownOperands(MacroAssembler* masm, |
| Label* not_numbers) { |
| Label load_smi_rdx, load_nonsmi_rax, load_smi_rax, load_float_rax, done; |
| // Load operand in rdx into xmm0, or branch to not_numbers. |
| __ LoadRoot(rcx, Heap::kHeapNumberMapRootIndex); |
| __ JumpIfSmi(rdx, &load_smi_rdx); |
| __ cmpq(FieldOperand(rdx, HeapObject::kMapOffset), rcx); |
| __ j(not_equal, not_numbers); // Argument in rdx is not a number. |
| __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| // Load operand in rax into xmm1, or branch to not_numbers. |
| __ JumpIfSmi(rax, &load_smi_rax); |
| |
| __ bind(&load_nonsmi_rax); |
| __ cmpq(FieldOperand(rax, HeapObject::kMapOffset), rcx); |
| __ j(not_equal, not_numbers); |
| __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| __ jmp(&done); |
| |
| __ bind(&load_smi_rdx); |
| __ SmiToInteger32(kScratchRegister, rdx); |
| __ cvtlsi2sd(xmm0, kScratchRegister); |
| __ JumpIfNotSmi(rax, &load_nonsmi_rax); |
| |
| __ bind(&load_smi_rax); |
| __ SmiToInteger32(kScratchRegister, rax); |
| __ cvtlsi2sd(xmm1, kScratchRegister); |
| __ bind(&done); |
| } |
| |
| |
| void FloatingPointHelper::NumbersToSmis(MacroAssembler* masm, |
| Register first, |
| Register second, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Label* on_success, |
| Label* on_not_smis) { |
| Register heap_number_map = scratch3; |
| Register smi_result = scratch1; |
| Label done; |
| |
| __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| |
| Label first_smi; |
| __ JumpIfSmi(first, &first_smi, Label::kNear); |
| __ cmpq(FieldOperand(first, HeapObject::kMapOffset), heap_number_map); |
| __ j(not_equal, on_not_smis); |
| // Convert HeapNumber to smi if possible. |
| __ movsd(xmm0, FieldOperand(first, HeapNumber::kValueOffset)); |
| __ movq(scratch2, xmm0); |
| __ cvttsd2siq(smi_result, xmm0); |
| // Check if conversion was successful by converting back and |
| // comparing to the original double's bits. |
| __ cvtlsi2sd(xmm1, smi_result); |
| __ movq(kScratchRegister, xmm1); |
| __ cmpq(scratch2, kScratchRegister); |
| __ j(not_equal, on_not_smis); |
| __ Integer32ToSmi(first, smi_result); |
| |
| __ JumpIfSmi(second, (on_success != NULL) ? on_success : &done); |
| __ bind(&first_smi); |
| if (FLAG_debug_code) { |
| // Second should be non-smi if we get here. |
| __ AbortIfSmi(second); |
| } |
| __ cmpq(FieldOperand(second, HeapObject::kMapOffset), heap_number_map); |
| __ j(not_equal, on_not_smis); |
| // Convert second to smi, if possible. |
| __ movsd(xmm0, FieldOperand(second, HeapNumber::kValueOffset)); |
| __ movq(scratch2, xmm0); |
| __ cvttsd2siq(smi_result, xmm0); |
| __ cvtlsi2sd(xmm1, smi_result); |
| __ movq(kScratchRegister, xmm1); |
| __ cmpq(scratch2, kScratchRegister); |
| __ j(not_equal, on_not_smis); |
| __ Integer32ToSmi(second, smi_result); |
| if (on_success != NULL) { |
| __ jmp(on_success); |
| } else { |
| __ bind(&done); |
| } |
| } |
| |
| |
| void MathPowStub::Generate(MacroAssembler* masm) { |
| // Choose register conforming to calling convention (when bailing out). |
| #ifdef _WIN64 |
| const Register exponent = rdx; |
| #else |
| const Register exponent = rdi; |
| #endif |
| const Register base = rax; |
| const Register scratch = rcx; |
| const XMMRegister double_result = xmm3; |
| const XMMRegister double_base = xmm2; |
| const XMMRegister double_exponent = xmm1; |
| const XMMRegister double_scratch = xmm4; |
| |
| Label call_runtime, done, exponent_not_smi, int_exponent; |
| |
| // Save 1 in double_result - we need this several times later on. |
| __ movq(scratch, Immediate(1)); |
| __ cvtlsi2sd(double_result, scratch); |
| |
| if (exponent_type_ == ON_STACK) { |
| Label base_is_smi, unpack_exponent; |
| // The exponent and base are supplied as arguments on the stack. |
| // This can only happen if the stub is called from non-optimized code. |
| // Load input parameters from stack. |
| __ movq(base, Operand(rsp, 2 * kPointerSize)); |
| __ movq(exponent, Operand(rsp, 1 * kPointerSize)); |
| __ JumpIfSmi(base, &base_is_smi, Label::kNear); |
| __ CompareRoot(FieldOperand(base, HeapObject::kMapOffset), |
| Heap::kHeapNumberMapRootIndex); |
| __ j(not_equal, &call_runtime); |
| |
| __ movsd(double_base, FieldOperand(base, HeapNumber::kValueOffset)); |
| __ jmp(&unpack_exponent, Label::kNear); |
| |
| __ bind(&base_is_smi); |
| __ SmiToInteger32(base, base); |
| __ cvtlsi2sd(double_base, base); |
| __ bind(&unpack_exponent); |
| |
| __ JumpIfNotSmi(exponent, &exponent_not_smi, Label::kNear); |
| __ SmiToInteger32(exponent, exponent); |
| __ jmp(&int_exponent); |
| |
| __ bind(&exponent_not_smi); |
| __ CompareRoot(FieldOperand(exponent, HeapObject::kMapOffset), |
| Heap::kHeapNumberMapRootIndex); |
| __ j(not_equal, &call_runtime); |
| __ movsd(double_exponent, FieldOperand(exponent, HeapNumber::kValueOffset)); |
| } else if (exponent_type_ == TAGGED) { |
| __ JumpIfNotSmi(exponent, &exponent_not_smi, Label::kNear); |
| __ SmiToInteger32(exponent, exponent); |
| __ jmp(&int_exponent); |
| |
| __ bind(&exponent_not_smi); |
| __ movsd(double_exponent, FieldOperand(exponent, HeapNumber::kValueOffset)); |
| } |
| |
| if (exponent_type_ != INTEGER) { |
| Label fast_power; |
| // Detect integer exponents stored as double. |
| __ cvttsd2si(exponent, double_exponent); |
| // Skip to runtime if possibly NaN (indicated by the indefinite integer). |
| __ cmpl(exponent, Immediate(0x80000000u)); |
| __ j(equal, &call_runtime); |
| __ cvtlsi2sd(double_scratch, exponent); |
| // Already ruled out NaNs for exponent. |
| __ ucomisd(double_exponent, double_scratch); |
| __ j(equal, &int_exponent); |
| |
| if (exponent_type_ == ON_STACK) { |
| // Detect square root case. Crankshaft detects constant +/-0.5 at |
| // compile time and uses DoMathPowHalf instead. We then skip this check |
| // for non-constant cases of +/-0.5 as these hardly occur. |
| Label continue_sqrt, continue_rsqrt, not_plus_half; |
| // Test for 0.5. |
| // Load double_scratch with 0.5. |
| __ movq(scratch, V8_UINT64_C(0x3FE0000000000000), RelocInfo::NONE); |
| __ movq(double_scratch, scratch); |
| // Already ruled out NaNs for exponent. |
| __ ucomisd(double_scratch, double_exponent); |
| __ j(not_equal, ¬_plus_half, Label::kNear); |
| |
| // Calculates square root of base. Check for the special case of |
| // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13). |
| // According to IEEE-754, double-precision -Infinity has the highest |
| // 12 bits set and the lowest 52 bits cleared. |
| __ movq(scratch, V8_UINT64_C(0xFFF0000000000000), RelocInfo::NONE); |
| __ movq(double_scratch, scratch); |
| __ ucomisd(double_scratch, double_base); |
| // Comparing -Infinity with NaN results in "unordered", which sets the |
| // zero flag as if both were equal. However, it also sets the carry flag. |
| __ j(not_equal, &continue_sqrt, Label::kNear); |
| __ j(carry, &continue_sqrt, Label::kNear); |
| |
| // Set result to Infinity in the special case. |
| __ xorps(double_result, double_result); |
| __ subsd(double_result, double_scratch); |
| __ jmp(&done); |
| |
| __ bind(&continue_sqrt); |
| // sqrtsd returns -0 when input is -0. ECMA spec requires +0. |
| __ xorps(double_scratch, double_scratch); |
| __ addsd(double_scratch, double_base); // Convert -0 to 0. |
| __ sqrtsd(double_result, double_scratch); |
| __ jmp(&done); |
| |
| // Test for -0.5. |
| __ bind(¬_plus_half); |
| // Load double_scratch with -0.5 by substracting 1. |
| __ subsd(double_scratch, double_result); |
| // Already ruled out NaNs for exponent. |
| __ ucomisd(double_scratch, double_exponent); |
| __ j(not_equal, &fast_power, Label::kNear); |
| |
| // Calculates reciprocal of square root of base. Check for the special |
| // case of Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13). |
| // According to IEEE-754, double-precision -Infinity has the highest |
| // 12 bits set and the lowest 52 bits cleared. |
| __ movq(scratch, V8_UINT64_C(0xFFF0000000000000), RelocInfo::NONE); |
| __ movq(double_scratch, scratch); |
| __ ucomisd(double_scratch, double_base); |
| // Comparing -Infinity with NaN results in "unordered", which sets the |
| // zero flag as if both were equal. However, it also sets the carry flag. |
| __ j(not_equal, &continue_rsqrt, Label::kNear); |
| __ j(carry, &continue_rsqrt, Label::kNear); |
| |
| // Set result to 0 in the special case. |
| __ xorps(double_result, double_result); |
| __ jmp(&done); |
| |
| __ bind(&continue_rsqrt); |
| // sqrtsd returns -0 when input is -0. ECMA spec requires +0. |
| __ xorps(double_exponent, double_exponent); |
| __ addsd(double_exponent, double_base); // Convert -0 to +0. |
| __ sqrtsd(double_exponent, double_exponent); |
| __ divsd(double_result, double_exponent); |
| __ jmp(&done); |
| } |
| |
| // Using FPU instructions to calculate power. |
| Label fast_power_failed; |
| __ bind(&fast_power); |
| __ fnclex(); // Clear flags to catch exceptions later. |
| // Transfer (B)ase and (E)xponent onto the FPU register stack. |
| __ subq(rsp, Immediate(kDoubleSize)); |
| __ movsd(Operand(rsp, 0), double_exponent); |
| __ fld_d(Operand(rsp, 0)); // E |
| __ movsd(Operand(rsp, 0), double_base); |
| __ fld_d(Operand(rsp, 0)); // B, E |
| |
| // Exponent is in st(1) and base is in st(0) |
| // B ^ E = (2^(E * log2(B)) - 1) + 1 = (2^X - 1) + 1 for X = E * log2(B) |
| // FYL2X calculates st(1) * log2(st(0)) |
| __ fyl2x(); // X |
| __ fld(0); // X, X |
| __ frndint(); // rnd(X), X |
| __ fsub(1); // rnd(X), X-rnd(X) |
| __ fxch(1); // X - rnd(X), rnd(X) |
| // F2XM1 calculates 2^st(0) - 1 for -1 < st(0) < 1 |
| __ f2xm1(); // 2^(X-rnd(X)) - 1, rnd(X) |
| __ fld1(); // 1, 2^(X-rnd(X)) - 1, rnd(X) |
| __ faddp(1); // 1, 2^(X-rnd(X)), rnd(X) |
| // FSCALE calculates st(0) * 2^st(1) |
| __ fscale(); // 2^X, rnd(X) |
| __ fstp(1); |
| // Bail out to runtime in case of exceptions in the status word. |
| __ fnstsw_ax(); |
| __ testb(rax, Immediate(0x5F)); // Check for all but precision exception. |
| __ j(not_zero, &fast_power_failed, Label::kNear); |
| __ fstp_d(Operand(rsp, 0)); |
| __ movsd(double_result, Operand(rsp, 0)); |
| __ addq(rsp, Immediate(kDoubleSize)); |
| __ jmp(&done); |
| |
| __ bind(&fast_power_failed); |
| __ fninit(); |
| __ addq(rsp, Immediate(kDoubleSize)); |
| __ jmp(&call_runtime); |
| } |
| |
| // Calculate power with integer exponent. |
| __ bind(&int_exponent); |
| const XMMRegister double_scratch2 = double_exponent; |
| // Back up exponent as we need to check if exponent is negative later. |
| __ movq(scratch, exponent); // Back up exponent. |
| __ movsd(double_scratch, double_base); // Back up base. |
| __ movsd(double_scratch2, double_result); // Load double_exponent with 1. |
| |
| // Get absolute value of exponent. |
| Label no_neg, while_true, no_multiply; |
| __ testl(scratch, scratch); |
| __ j(positive, &no_neg, Label::kNear); |
| __ negl(scratch); |
| __ bind(&no_neg); |
| |
| __ bind(&while_true); |
| __ shrl(scratch, Immediate(1)); |
| __ j(not_carry, &no_multiply, Label::kNear); |
| __ mulsd(double_result, double_scratch); |
| __ bind(&no_multiply); |
| |
| __ mulsd(double_scratch, double_scratch); |
| __ j(not_zero, &while_true); |
| |
| // If the exponent is negative, return 1/result. |
| __ testl(exponent, exponent); |
| __ j(greater, &done); |
| __ divsd(double_scratch2, double_result); |
| __ movsd(double_result, double_scratch2); |
| // Test whether result is zero. Bail out to check for subnormal result. |
| // Due to subnormals, x^-y == (1/x)^y does not hold in all cases. |
| __ xorps(double_scratch2, double_scratch2); |
| __ ucomisd(double_scratch2, double_result); |
| // double_exponent aliased as double_scratch2 has already been overwritten |
| // and may not have contained the exponent value in the first place when the |
| // input was a smi. We reset it with exponent value before bailing out. |
| __ j(not_equal, &done); |
| __ cvtlsi2sd(double_exponent, exponent); |
| |
| // Returning or bailing out. |
| Counters* counters = masm->isolate()->counters(); |
| if (exponent_type_ == ON_STACK) { |
| // The arguments are still on the stack. |
| __ bind(&call_runtime); |
| __ TailCallRuntime(Runtime::kMath_pow_cfunction, 2, 1); |
| |
| // The stub is called from non-optimized code, which expects the result |
| // as heap number in eax. |
| __ bind(&done); |
| __ AllocateHeapNumber(rax, rcx, &call_runtime); |
| __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), double_result); |
| __ IncrementCounter(counters->math_pow(), 1); |
| __ ret(2 * kPointerSize); |
| } else { |
| __ bind(&call_runtime); |
| // Move base to the correct argument register. Exponent is already in xmm1. |
| __ movsd(xmm0, double_base); |
| ASSERT(double_exponent.is(xmm1)); |
| { |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ PrepareCallCFunction(2); |
| __ CallCFunction( |
| ExternalReference::power_double_double_function(masm->isolate()), 2); |
| } |
| // Return value is in xmm0. |
| __ movsd(double_result, xmm0); |
| // Restore context register. |
| __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| |
| __ bind(&done); |
| __ IncrementCounter(counters->math_pow(), 1); |
| __ ret(0); |
| } |
| } |
| |
| |
| void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| // The key is in rdx and the parameter count is in rax. |
| |
| // The displacement is used for skipping the frame pointer on the |
| // stack. It is the offset of the last parameter (if any) relative |
| // to the frame pointer. |
| static const int kDisplacement = 1 * kPointerSize; |
| |
| // Check that the key is a smi. |
| Label slow; |
| __ JumpIfNotSmi(rdx, &slow); |
| |
| // Check if the calling frame is an arguments adaptor frame. We look at the |
| // context offset, and if the frame is not a regular one, then we find a |
| // Smi instead of the context. We can't use SmiCompare here, because that |
| // only works for comparing two smis. |
| Label adaptor; |
| __ movq(rbx, Operand(rbp, StandardFrameConstants::kCallerFPOffset)); |
| __ Cmp(Operand(rbx, StandardFrameConstants::kContextOffset), |
| Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ j(equal, &adaptor); |
| |
| // Check index against formal parameters count limit passed in |
| // through register rax. Use unsigned comparison to get negative |
| // check for free. |
| __ cmpq(rdx, rax); |
| __ j(above_equal, &slow); |
| |
| // Read the argument from the stack and return it. |
| SmiIndex index = masm->SmiToIndex(rax, rax, kPointerSizeLog2); |
| __ lea(rbx, Operand(rbp, index.reg, index.scale, 0)); |
| index = masm->SmiToNegativeIndex(rdx, rdx, kPointerSizeLog2); |
| __ movq(rax, Operand(rbx, index.reg, index.scale, kDisplacement)); |
| __ Ret(); |
| |
| // Arguments adaptor case: Check index against actual arguments |
| // limit found in the arguments adaptor frame. Use unsigned |
| // comparison to get negative check for free. |
| __ bind(&adaptor); |
| __ movq(rcx, Operand(rbx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ cmpq(rdx, rcx); |
| __ j(above_equal, &slow); |
| |
| // Read the argument from the stack and return it. |
| index = masm->SmiToIndex(rax, rcx, kPointerSizeLog2); |
| __ lea(rbx, Operand(rbx, index.reg, index.scale, 0)); |
| index = masm->SmiToNegativeIndex(rdx, rdx, kPointerSizeLog2); |
| __ movq(rax, Operand(rbx, index.reg, index.scale, kDisplacement)); |
| __ Ret(); |
| |
| // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| // by calling the runtime system. |
| __ bind(&slow); |
| __ pop(rbx); // Return address. |
| __ push(rdx); |
| __ push(rbx); |
| __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
| } |
| |
| |
| void ArgumentsAccessStub::GenerateNewNonStrictFast(MacroAssembler* masm) { |
| // Stack layout: |
| // rsp[0] : return address |
| // rsp[8] : number of parameters (tagged) |
| // rsp[16] : receiver displacement |
| // rsp[24] : function |
| // Registers used over the whole function: |
| // rbx: the mapped parameter count (untagged) |
| // rax: the allocated object (tagged). |
| |
| Factory* factory = masm->isolate()->factory(); |
| |
| __ SmiToInteger64(rbx, Operand(rsp, 1 * kPointerSize)); |
| // rbx = parameter count (untagged) |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| Label runtime; |
| Label adaptor_frame, try_allocate; |
| __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset)); |
| __ movq(rcx, Operand(rdx, StandardFrameConstants::kContextOffset)); |
| __ Cmp(rcx, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ j(equal, &adaptor_frame); |
| |
| // No adaptor, parameter count = argument count. |
| __ movq(rcx, rbx); |
| __ jmp(&try_allocate, Label::kNear); |
| |
| // We have an adaptor frame. Patch the parameters pointer. |
| __ bind(&adaptor_frame); |
| __ SmiToInteger64(rcx, |
| Operand(rdx, |
| ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ lea(rdx, Operand(rdx, rcx, times_pointer_size, |
| StandardFrameConstants::kCallerSPOffset)); |
| __ movq(Operand(rsp, 2 * kPointerSize), rdx); |
| |
| // rbx = parameter count (untagged) |
| // rcx = argument count (untagged) |
| // Compute the mapped parameter count = min(rbx, rcx) in rbx. |
| __ cmpq(rbx, rcx); |
| __ j(less_equal, &try_allocate, Label::kNear); |
| __ movq(rbx, rcx); |
| |
| __ bind(&try_allocate); |
| |
| // Compute the sizes of backing store, parameter map, and arguments object. |
| // 1. Parameter map, has 2 extra words containing context and backing store. |
| const int kParameterMapHeaderSize = |
| FixedArray::kHeaderSize + 2 * kPointerSize; |
| Label no_parameter_map; |
| __ xor_(r8, r8); |
| __ testq(rbx, rbx); |
| __ j(zero, &no_parameter_map, Label::kNear); |
| __ lea(r8, Operand(rbx, times_pointer_size, kParameterMapHeaderSize)); |
| __ bind(&no_parameter_map); |
| |
| // 2. Backing store. |
| __ lea(r8, Operand(r8, rcx, times_pointer_size, FixedArray::kHeaderSize)); |
| |
| // 3. Arguments object. |
| __ addq(r8, Immediate(Heap::kArgumentsObjectSize)); |
| |
| // Do the allocation of all three objects in one go. |
| __ AllocateInNewSpace(r8, rax, rdx, rdi, &runtime, TAG_OBJECT); |
| |
| // rax = address of new object(s) (tagged) |
| // rcx = argument count (untagged) |
| // Get the arguments boilerplate from the current (global) context into rdi. |
| Label has_mapped_parameters, copy; |
| __ movq(rdi, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| __ movq(rdi, FieldOperand(rdi, GlobalObject::kGlobalContextOffset)); |
| __ testq(rbx, rbx); |
| __ j(not_zero, &has_mapped_parameters, Label::kNear); |
| |
| const int kIndex = Context::ARGUMENTS_BOILERPLATE_INDEX; |
| __ movq(rdi, Operand(rdi, Context::SlotOffset(kIndex))); |
| __ jmp(©, Label::kNear); |
| |
| const int kAliasedIndex = Context::ALIASED_ARGUMENTS_BOILERPLATE_INDEX; |
| __ bind(&has_mapped_parameters); |
| __ movq(rdi, Operand(rdi, Context::SlotOffset(kAliasedIndex))); |
| __ bind(©); |
| |
| // rax = address of new object (tagged) |
| // rbx = mapped parameter count (untagged) |
| // rcx = argument count (untagged) |
| // rdi = address of boilerplate object (tagged) |
| // Copy the JS object part. |
| for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| __ movq(rdx, FieldOperand(rdi, i)); |
| __ movq(FieldOperand(rax, i), rdx); |
| } |
| |
| // Set up the callee in-object property. |
| STATIC_ASSERT(Heap::kArgumentsCalleeIndex == 1); |
| __ movq(rdx, Operand(rsp, 3 * kPointerSize)); |
| __ movq(FieldOperand(rax, JSObject::kHeaderSize + |
| Heap::kArgumentsCalleeIndex * kPointerSize), |
| rdx); |
| |
| // Use the length (smi tagged) and set that as an in-object property too. |
| // Note: rcx is tagged from here on. |
| STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
| __ Integer32ToSmi(rcx, rcx); |
| __ movq(FieldOperand(rax, JSObject::kHeaderSize + |
| Heap::kArgumentsLengthIndex * kPointerSize), |
| rcx); |
| |
| // Set up the elements pointer in the allocated arguments object. |
| // If we allocated a parameter map, edi will point there, otherwise to the |
| // backing store. |
| __ lea(rdi, Operand(rax, Heap::kArgumentsObjectSize)); |
| __ movq(FieldOperand(rax, JSObject::kElementsOffset), rdi); |
| |
| // rax = address of new object (tagged) |
| // rbx = mapped parameter count (untagged) |
| // rcx = argument count (tagged) |
| // rdi = address of parameter map or backing store (tagged) |
| |
| // Initialize parameter map. If there are no mapped arguments, we're done. |
| Label skip_parameter_map; |
| __ testq(rbx, rbx); |
| __ j(zero, &skip_parameter_map); |
| |
| __ LoadRoot(kScratchRegister, Heap::kNonStrictArgumentsElementsMapRootIndex); |
| // rbx contains the untagged argument count. Add 2 and tag to write. |
| __ movq(FieldOperand(rdi, FixedArray::kMapOffset), kScratchRegister); |
| __ Integer64PlusConstantToSmi(r9, rbx, 2); |
| __ movq(FieldOperand(rdi, FixedArray::kLengthOffset), r9); |
| __ movq(FieldOperand(rdi, FixedArray::kHeaderSize + 0 * kPointerSize), rsi); |
| __ lea(r9, Operand(rdi, rbx, times_pointer_size, kParameterMapHeaderSize)); |
| __ movq(FieldOperand(rdi, FixedArray::kHeaderSize + 1 * kPointerSize), r9); |
| |
| // Copy the parameter slots and the holes in the arguments. |
| // We need to fill in mapped_parameter_count slots. They index the context, |
| // where parameters are stored in reverse order, at |
| // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS+parameter_count-1 |
| // The mapped parameter thus need to get indices |
| // MIN_CONTEXT_SLOTS+parameter_count-1 .. |
| // MIN_CONTEXT_SLOTS+parameter_count-mapped_parameter_count |
| // We loop from right to left. |
| Label parameters_loop, parameters_test; |
| |
| // Load tagged parameter count into r9. |
| __ Integer32ToSmi(r9, rbx); |
| __ Move(r8, Smi::FromInt(Context::MIN_CONTEXT_SLOTS)); |
| __ addq(r8, Operand(rsp, 1 * kPointerSize)); |
| __ subq(r8, r9); |
| __ Move(r11, factory->the_hole_value()); |
| __ movq(rdx, rdi); |
| __ lea(rdi, Operand(rdi, rbx, times_pointer_size, kParameterMapHeaderSize)); |
| // r9 = loop variable (tagged) |
| // r8 = mapping index (tagged) |
| // r11 = the hole value |
| // rdx = address of parameter map (tagged) |
| // rdi = address of backing store (tagged) |
| __ jmp(¶meters_test, Label::kNear); |
| |
| __ bind(¶meters_loop); |
| __ SmiSubConstant(r9, r9, Smi::FromInt(1)); |
| __ SmiToInteger64(kScratchRegister, r9); |
| __ movq(FieldOperand(rdx, kScratchRegister, |
| times_pointer_size, |
| kParameterMapHeaderSize), |
| r8); |
| __ movq(FieldOperand(rdi, kScratchRegister, |
| times_pointer_size, |
| FixedArray::kHeaderSize), |
| r11); |
| __ SmiAddConstant(r8, r8, Smi::FromInt(1)); |
| __ bind(¶meters_test); |
| __ SmiTest(r9); |
| __ j(not_zero, ¶meters_loop, Label::kNear); |
| |
| __ bind(&skip_parameter_map); |
| |
| // rcx = argument count (tagged) |
| // rdi = address of backing store (tagged) |
| // Copy arguments header and remaining slots (if there are any). |
| __ Move(FieldOperand(rdi, FixedArray::kMapOffset), |
| factory->fixed_array_map()); |
| __ movq(FieldOperand(rdi, FixedArray::kLengthOffset), rcx); |
| |
| Label arguments_loop, arguments_test; |
| __ movq(r8, rbx); |
| __ movq(rdx, Operand(rsp, 2 * kPointerSize)); |
| // Untag rcx for the loop below. |
| __ SmiToInteger64(rcx, rcx); |
| __ lea(kScratchRegister, Operand(r8, times_pointer_size, 0)); |
| __ subq(rdx, kScratchRegister); |
| __ jmp(&arguments_test, Label::kNear); |
| |
| __ bind(&arguments_loop); |
| __ subq(rdx, Immediate(kPointerSize)); |
| __ movq(r9, Operand(rdx, 0)); |
| __ movq(FieldOperand(rdi, r8, |
| times_pointer_size, |
| FixedArray::kHeaderSize), |
| r9); |
| __ addq(r8, Immediate(1)); |
| |
| __ bind(&arguments_test); |
| __ cmpq(r8, rcx); |
| __ j(less, &arguments_loop, Label::kNear); |
| |
| // Return and remove the on-stack parameters. |
| __ ret(3 * kPointerSize); |
| |
| // Do the runtime call to allocate the arguments object. |
| // rcx = argument count (untagged) |
| __ bind(&runtime); |
| __ Integer32ToSmi(rcx, rcx); |
| __ movq(Operand(rsp, 1 * kPointerSize), rcx); // Patch argument count. |
| __ TailCallRuntime(Runtime::kNewStrictArgumentsFast, 3, 1); |
| } |
| |
| |
| void ArgumentsAccessStub::GenerateNewNonStrictSlow(MacroAssembler* masm) { |
| // esp[0] : return address |
| // esp[8] : number of parameters |
| // esp[16] : receiver displacement |
| // esp[24] : function |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| Label runtime; |
| __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset)); |
| __ movq(rcx, Operand(rdx, StandardFrameConstants::kContextOffset)); |
| __ Cmp(rcx, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ j(not_equal, &runtime); |
| |
| // Patch the arguments.length and the parameters pointer. |
| __ movq(rcx, Operand(rdx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ movq(Operand(rsp, 1 * kPointerSize), rcx); |
| __ SmiToInteger64(rcx, rcx); |
| __ lea(rdx, Operand(rdx, rcx, times_pointer_size, |
| StandardFrameConstants::kCallerSPOffset)); |
| __ movq(Operand(rsp, 2 * kPointerSize), rdx); |
| |
| __ bind(&runtime); |
| __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| } |
| |
| |
| void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) { |
| // rsp[0] : return address |
| // rsp[8] : number of parameters |
| // rsp[16] : receiver displacement |
| // rsp[24] : function |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| Label adaptor_frame, try_allocate, runtime; |
| __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset)); |
| __ movq(rcx, Operand(rdx, StandardFrameConstants::kContextOffset)); |
| __ Cmp(rcx, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ j(equal, &adaptor_frame); |
| |
| // Get the length from the frame. |
| __ movq(rcx, Operand(rsp, 1 * kPointerSize)); |
| __ SmiToInteger64(rcx, rcx); |
| __ jmp(&try_allocate); |
| |
| // Patch the arguments.length and the parameters pointer. |
| __ bind(&adaptor_frame); |
| __ movq(rcx, Operand(rdx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ movq(Operand(rsp, 1 * kPointerSize), rcx); |
| __ SmiToInteger64(rcx, rcx); |
| __ lea(rdx, Operand(rdx, rcx, times_pointer_size, |
| StandardFrameConstants::kCallerSPOffset)); |
| __ movq(Operand(rsp, 2 * kPointerSize), rdx); |
| |
| // Try the new space allocation. Start out with computing the size of |
| // the arguments object and the elements array. |
| Label add_arguments_object; |
| __ bind(&try_allocate); |
| __ testq(rcx, rcx); |
| __ j(zero, &add_arguments_object, Label::kNear); |
| __ lea(rcx, Operand(rcx, times_pointer_size, FixedArray::kHeaderSize)); |
| __ bind(&add_arguments_object); |
| __ addq(rcx, Immediate(Heap::kArgumentsObjectSizeStrict)); |
| |
| // Do the allocation of both objects in one go. |
| __ AllocateInNewSpace(rcx, rax, rdx, rbx, &runtime, TAG_OBJECT); |
| |
| // Get the arguments boilerplate from the current (global) context. |
| __ movq(rdi, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| __ movq(rdi, FieldOperand(rdi, GlobalObject::kGlobalContextOffset)); |
| const int offset = |
| Context::SlotOffset(Context::STRICT_MODE_ARGUMENTS_BOILERPLATE_INDEX); |
| __ movq(rdi, Operand(rdi, offset)); |
| |
| // Copy the JS object part. |
| for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| __ movq(rbx, FieldOperand(rdi, i)); |
| __ movq(FieldOperand(rax, i), rbx); |
| } |
| |
| // Get the length (smi tagged) and set that as an in-object property too. |
| STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
| __ movq(rcx, Operand(rsp, 1 * kPointerSize)); |
| __ movq(FieldOperand(rax, JSObject::kHeaderSize + |
| Heap::kArgumentsLengthIndex * kPointerSize), |
| rcx); |
| |
| // If there are no actual arguments, we're done. |
| Label done; |
| __ testq(rcx, rcx); |
| __ j(zero, &done); |
| |
| // Get the parameters pointer from the stack. |
| __ movq(rdx, Operand(rsp, 2 * kPointerSize)); |
| |
| // Set up the elements pointer in the allocated arguments object and |
| // initialize the header in the elements fixed array. |
| __ lea(rdi, Operand(rax, Heap::kArgumentsObjectSizeStrict)); |
| __ movq(FieldOperand(rax, JSObject::kElementsOffset), rdi); |
| __ LoadRoot(kScratchRegister, Heap::kFixedArrayMapRootIndex); |
| __ movq(FieldOperand(rdi, FixedArray::kMapOffset), kScratchRegister); |
| |
| |
| __ movq(FieldOperand(rdi, FixedArray::kLengthOffset), rcx); |
| // Untag the length for the loop below. |
| __ SmiToInteger64(rcx, rcx); |
| |
| // Copy the fixed array slots. |
| Label loop; |
| __ bind(&loop); |
| __ movq(rbx, Operand(rdx, -1 * kPointerSize)); // Skip receiver. |
| __ movq(FieldOperand(rdi, FixedArray::kHeaderSize), rbx); |
| __ addq(rdi, Immediate(kPointerSize)); |
| __ subq(rdx, Immediate(kPointerSize)); |
| __ decq(rcx); |
| __ j(not_zero, &loop); |
| |
| // Return and remove the on-stack parameters. |
| __ bind(&done); |
| __ ret(3 * kPointerSize); |
| |
| // Do the runtime call to allocate the arguments object. |
| __ bind(&runtime); |
| __ TailCallRuntime(Runtime::kNewStrictArgumentsFast, 3, 1); |
| } |
| |
| |
| void RegExpExecStub::Generate(MacroAssembler* masm) { |
| // Just jump directly to runtime if native RegExp is not selected at compile |
| // time or if regexp entry in generated code is turned off runtime switch or |
| // at compilation. |
| #ifdef V8_INTERPRETED_REGEXP |
| __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| #else // V8_INTERPRETED_REGEXP |
| |
| // Stack frame on entry. |
| // rsp[0]: return address |
| // rsp[8]: last_match_info (expected JSArray) |
| // rsp[16]: previous index |
| // rsp[24]: subject string |
| // rsp[32]: JSRegExp object |
| |
| static const int kLastMatchInfoOffset = 1 * kPointerSize; |
| static const int kPreviousIndexOffset = 2 * kPointerSize; |
| static const int kSubjectOffset = 3 * kPointerSize; |
| static const int kJSRegExpOffset = 4 * kPointerSize; |
| |
| Label runtime; |
| // Ensure that a RegExp stack is allocated. |
| Isolate* isolate = masm->isolate(); |
| ExternalReference address_of_regexp_stack_memory_address = |
| ExternalReference::address_of_regexp_stack_memory_address(isolate); |
| ExternalReference address_of_regexp_stack_memory_size = |
| ExternalReference::address_of_regexp_stack_memory_size(isolate); |
| __ Load(kScratchRegister, address_of_regexp_stack_memory_size); |
| __ testq(kScratchRegister, kScratchRegister); |
| __ j(zero, &runtime); |
| |
| // Check that the first argument is a JSRegExp object. |
| __ movq(rax, Operand(rsp, kJSRegExpOffset)); |
| __ JumpIfSmi(rax, &runtime); |
| __ CmpObjectType(rax, JS_REGEXP_TYPE, kScratchRegister); |
| __ j(not_equal, &runtime); |
| // Check that the RegExp has been compiled (data contains a fixed array). |
| __ movq(rax, FieldOperand(rax, JSRegExp::kDataOffset)); |
| if (FLAG_debug_code) { |
| Condition is_smi = masm->CheckSmi(rax); |
| __ Check(NegateCondition(is_smi), |
| "Unexpected type for RegExp data, FixedArray expected"); |
| __ CmpObjectType(rax, FIXED_ARRAY_TYPE, kScratchRegister); |
| __ Check(equal, "Unexpected type for RegExp data, FixedArray expected"); |
| } |
| |
| // rax: RegExp data (FixedArray) |
| // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| __ SmiToInteger32(rbx, FieldOperand(rax, JSRegExp::kDataTagOffset)); |
| __ cmpl(rbx, Immediate(JSRegExp::IRREGEXP)); |
| __ j(not_equal, &runtime); |
| |
| // rax: RegExp data (FixedArray) |
| // Check that the number of captures fit in the static offsets vector buffer. |
| __ SmiToInteger32(rdx, |
| FieldOperand(rax, JSRegExp::kIrregexpCaptureCountOffset)); |
| // Calculate number of capture registers (number_of_captures + 1) * 2. |
| __ leal(rdx, Operand(rdx, rdx, times_1, 2)); |
| // Check that the static offsets vector buffer is large enough. |
| __ cmpl(rdx, Immediate(OffsetsVector::kStaticOffsetsVectorSize)); |
| __ j(above, &runtime); |
| |
| // rax: RegExp data (FixedArray) |
| // rdx: Number of capture registers |
| // Check that the second argument is a string. |
| __ movq(rdi, Operand(rsp, kSubjectOffset)); |
| __ JumpIfSmi(rdi, &runtime); |
| Condition is_string = masm->IsObjectStringType(rdi, rbx, rbx); |
| __ j(NegateCondition(is_string), &runtime); |
| |
| // rdi: Subject string. |
| // rax: RegExp data (FixedArray). |
| // rdx: Number of capture registers. |
| // Check that the third argument is a positive smi less than the string |
| // length. A negative value will be greater (unsigned comparison). |
| __ movq(rbx, Operand(rsp, kPreviousIndexOffset)); |
| __ JumpIfNotSmi(rbx, &runtime); |
| __ SmiCompare(rbx, FieldOperand(rdi, String::kLengthOffset)); |
| __ j(above_equal, &runtime); |
| |
| // rax: RegExp data (FixedArray) |
| // rdx: Number of capture registers |
| // Check that the fourth object is a JSArray object. |
| __ movq(rdi, Operand(rsp, kLastMatchInfoOffset)); |
| __ JumpIfSmi(rdi, &runtime); |
| __ CmpObjectType(rdi, JS_ARRAY_TYPE, kScratchRegister); |
| __ j(not_equal, &runtime); |
| // Check that the JSArray is in fast case. |
| __ movq(rbx, FieldOperand(rdi, JSArray::kElementsOffset)); |
| __ movq(rdi, FieldOperand(rbx, HeapObject::kMapOffset)); |
| __ CompareRoot(FieldOperand(rbx, HeapObject::kMapOffset), |
| Heap::kFixedArrayMapRootIndex); |
| __ j(not_equal, &runtime); |
| // Check that the last match info has space for the capture registers and the |
| // additional information. Ensure no overflow in add. |
| STATIC_ASSERT(FixedArray::kMaxLength < kMaxInt - FixedArray::kLengthOffset); |
| __ SmiToInteger32(rdi, FieldOperand(rbx, FixedArray::kLengthOffset)); |
| __ addl(rdx, Immediate(RegExpImpl::kLastMatchOverhead)); |
| __ cmpl(rdx, rdi); |
| __ j(greater, &runtime); |
| |
| // Reset offset for possibly sliced string. |
| __ Set(r14, 0); |
| // rax: RegExp data (FixedArray) |
| // Check the representation and encoding of the subject string. |
| Label seq_ascii_string, seq_two_byte_string, check_code; |
| __ movq(rdi, Operand(rsp, kSubjectOffset)); |
| // Make a copy of the original subject string. |
| __ movq(r15, rdi); |
| __ movq(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
| __ movzxbl(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); |
| // First check for flat two byte string. |
| __ andb(rbx, Immediate(kIsNotStringMask | |
| kStringRepresentationMask | |
| kStringEncodingMask | |
| kShortExternalStringMask)); |
| STATIC_ASSERT((kStringTag | kSeqStringTag | kTwoByteStringTag) == 0); |
| __ j(zero, &seq_two_byte_string, Label::kNear); |
| // Any other flat string must be a flat ASCII string. None of the following |
| // string type tests will succeed if subject is not a string or a short |
| // external string. |
| __ andb(rbx, Immediate(kIsNotStringMask | |
| kStringRepresentationMask | |
| kShortExternalStringMask)); |
| __ j(zero, &seq_ascii_string, Label::kNear); |
| |
| // rbx: whether subject is a string and if yes, its string representation |
| // Check for flat cons string or sliced string. |
| // A flat cons string is a cons string where the second part is the empty |
| // string. In that case the subject string is just the first part of the cons |
| // string. Also in this case the first part of the cons string is known to be |
| // a sequential string or an external string. |
| // In the case of a sliced string its offset has to be taken into account. |
| Label cons_string, external_string, check_encoding; |
| STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| STATIC_ASSERT(kSlicedStringTag > kExternalStringTag); |
| STATIC_ASSERT(kIsNotStringMask > kExternalStringTag); |
| STATIC_ASSERT(kShortExternalStringTag > kExternalStringTag); |
| __ cmpq(rbx, Immediate(kExternalStringTag)); |
| __ j(less, &cons_string, Label::kNear); |
| __ j(equal, &external_string); |
| |
| // Catch non-string subject or short external string. |
| STATIC_ASSERT(kNotStringTag != 0 && kShortExternalStringTag !=0); |
| __ testb(rbx, Immediate(kIsNotStringMask | kShortExternalStringMask)); |
| __ j(not_zero, &runtime); |
| |
| // String is sliced. |
| __ SmiToInteger32(r14, FieldOperand(rdi, SlicedString::kOffsetOffset)); |
| __ movq(rdi, FieldOperand(rdi, SlicedString::kParentOffset)); |
| // r14: slice offset |
| // r15: original subject string |
| // rdi: parent string |
| __ jmp(&check_encoding, Label::kNear); |
| // String is a cons string, check whether it is flat. |
| __ bind(&cons_string); |
| __ CompareRoot(FieldOperand(rdi, ConsString::kSecondOffset), |
| Heap::kEmptyStringRootIndex); |
| __ j(not_equal, &runtime); |
| __ movq(rdi, FieldOperand(rdi, ConsString::kFirstOffset)); |
| // rdi: first part of cons string or parent of sliced string. |
| // rbx: map of first part of cons string or map of parent of sliced string. |
| // Is first part of cons or parent of slice a flat two byte string? |
| __ bind(&check_encoding); |
| __ movq(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
| __ testb(FieldOperand(rbx, Map::kInstanceTypeOffset), |
| Immediate(kStringRepresentationMask | kStringEncodingMask)); |
| STATIC_ASSERT((kSeqStringTag | kTwoByteStringTag) == 0); |
| __ j(zero, &seq_two_byte_string, Label::kNear); |
| // Any other flat string must be sequential ASCII or external. |
| __ testb(FieldOperand(rbx, Map::kInstanceTypeOffset), |
| Immediate(kStringRepresentationMask)); |
| __ j(not_zero, &external_string); |
| |
| __ bind(&seq_ascii_string); |
| // rdi: subject string (sequential ASCII) |
| // rax: RegExp data (FixedArray) |
| __ movq(r11, FieldOperand(rax, JSRegExp::kDataAsciiCodeOffset)); |
| __ Set(rcx, 1); // Type is ASCII. |
| __ jmp(&check_code, Label::kNear); |
| |
| __ bind(&seq_two_byte_string); |
| // rdi: subject string (flat two-byte) |
| // rax: RegExp data (FixedArray) |
| __ movq(r11, FieldOperand(rax, JSRegExp::kDataUC16CodeOffset)); |
| __ Set(rcx, 0); // Type is two byte. |
| |
| __ bind(&check_code); |
| // Check that the irregexp code has been generated for the actual string |
| // encoding. If it has, the field contains a code object otherwise it contains |
| // smi (code flushing support) |
| __ JumpIfSmi(r11, &runtime); |
| |
| // rdi: subject string |
| // rcx: encoding of subject string (1 if ASCII, 0 if two_byte); |
| // r11: code |
| // Load used arguments before starting to push arguments for call to native |
| // RegExp code to avoid handling changing stack height. |
| __ SmiToInteger64(rbx, Operand(rsp, kPreviousIndexOffset)); |
| |
| // rdi: subject string |
| // rbx: previous index |
| // rcx: encoding of subject string (1 if ASCII 0 if two_byte); |
| // r11: code |
| // All checks done. Now push arguments for native regexp code. |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->regexp_entry_native(), 1); |
| |
| // Isolates: note we add an additional parameter here (isolate pointer). |
| static const int kRegExpExecuteArguments = 8; |
| int argument_slots_on_stack = |
| masm->ArgumentStackSlotsForCFunctionCall(kRegExpExecuteArguments); |
| __ EnterApiExitFrame(argument_slots_on_stack); |
| |
| // Argument 8: Pass current isolate address. |
| // __ movq(Operand(rsp, (argument_slots_on_stack - 1) * kPointerSize), |
| // Immediate(ExternalReference::isolate_address())); |
| __ LoadAddress(kScratchRegister, ExternalReference::isolate_address()); |
| __ movq(Operand(rsp, (argument_slots_on_stack - 1) * kPointerSize), |
| kScratchRegister); |
| |
| // Argument 7: Indicate that this is a direct call from JavaScript. |
| __ movq(Operand(rsp, (argument_slots_on_stack - 2) * kPointerSize), |
| Immediate(1)); |
| |
| // Argument 6: Start (high end) of backtracking stack memory area. |
| __ movq(kScratchRegister, address_of_regexp_stack_memory_address); |
| __ movq(r9, Operand(kScratchRegister, 0)); |
| __ movq(kScratchRegister, address_of_regexp_stack_memory_size); |
| __ addq(r9, Operand(kScratchRegister, 0)); |
| // Argument 6 passed in r9 on Linux and on the stack on Windows. |
| #ifdef _WIN64 |
| __ movq(Operand(rsp, (argument_slots_on_stack - 3) * kPointerSize), r9); |
| #endif |
| |
| // Argument 5: static offsets vector buffer. |
| __ LoadAddress(r8, |
| ExternalReference::address_of_static_offsets_vector(isolate)); |
| // Argument 5 passed in r8 on Linux and on the stack on Windows. |
| #ifdef _WIN64 |
| __ movq(Operand(rsp, (argument_slots_on_stack - 4) * kPointerSize), r8); |
| #endif |
| |
| // First four arguments are passed in registers on both Linux and Windows. |
| #ifdef _WIN64 |
| Register arg4 = r9; |
| Register arg3 = r8; |
| Register arg2 = rdx; |
| Register arg1 = rcx; |
| #else |
| Register arg4 = rcx; |
| Register arg3 = rdx; |
| Register arg2 = rsi; |
| Register arg1 = rdi; |
| #endif |
| |
| // Keep track on aliasing between argX defined above and the registers used. |
| // rdi: subject string |
| // rbx: previous index |
| // rcx: encoding of subject string (1 if ASCII 0 if two_byte); |
| // r11: code |
| // r14: slice offset |
| // r15: original subject string |
| |
| // Argument 2: Previous index. |
| __ movq(arg2, rbx); |
| |
| // Argument 4: End of string data |
| // Argument 3: Start of string data |
| Label setup_two_byte, setup_rest, got_length, length_not_from_slice; |
| // Prepare start and end index of the input. |
| // Load the length from the original sliced string if that is the case. |
| __ addq(rbx, r14); |
| __ SmiToInteger32(arg3, FieldOperand(r15, String::kLengthOffset)); |
| __ addq(r14, arg3); // Using arg3 as scratch. |
| |
| // rbx: start index of the input |
| // r14: end index of the input |
| // r15: original subject string |
| __ testb(rcx, rcx); // Last use of rcx as encoding of subject string. |
| __ j(zero, &setup_two_byte, Label::kNear); |
| __ lea(arg4, FieldOperand(rdi, r14, times_1, SeqAsciiString::kHeaderSize)); |
| __ lea(arg3, FieldOperand(rdi, rbx, times_1, SeqAsciiString::kHeaderSize)); |
| __ jmp(&setup_rest, Label::kNear); |
| __ bind(&setup_two_byte); |
| __ lea(arg4, FieldOperand(rdi, r14, times_2, SeqTwoByteString::kHeaderSize)); |
| __ lea(arg3, FieldOperand(rdi, rbx, times_2, SeqTwoByteString::kHeaderSize)); |
| __ bind(&setup_rest); |
| |
| // Argument 1: Original subject string. |
| // The original subject is in the previous stack frame. Therefore we have to |
| // use rbp, which points exactly to one pointer size below the previous rsp. |
| // (Because creating a new stack frame pushes the previous rbp onto the stack |
| // and thereby moves up rsp by one kPointerSize.) |
| __ movq(arg1, r15); |
| |
| // Locate the code entry and call it. |
| __ addq(r11, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| __ call(r11); |
| |
| __ LeaveApiExitFrame(); |
| |
| // Check the result. |
| Label success; |
| Label exception; |
| __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::SUCCESS)); |
| __ j(equal, &success, Label::kNear); |
| __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::EXCEPTION)); |
| __ j(equal, &exception); |
| __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::FAILURE)); |
| // If none of the above, it can only be retry. |
| // Handle that in the runtime system. |
| __ j(not_equal, &runtime); |
| |
| // For failure return null. |
| __ LoadRoot(rax, Heap::kNullValueRootIndex); |
| __ ret(4 * kPointerSize); |
| |
| // Load RegExp data. |
| __ bind(&success); |
| __ movq(rax, Operand(rsp, kJSRegExpOffset)); |
| __ movq(rcx, FieldOperand(rax, JSRegExp::kDataOffset)); |
| __ SmiToInteger32(rax, |
| FieldOperand(rcx, JSRegExp::kIrregexpCaptureCountOffset)); |
| // Calculate number of capture registers (number_of_captures + 1) * 2. |
| __ leal(rdx, Operand(rax, rax, times_1, 2)); |
| |
| // rdx: Number of capture registers |
| // Load last_match_info which is still known to be a fast case JSArray. |
| __ movq(rax, Operand(rsp, kLastMatchInfoOffset)); |
| __ movq(rbx, FieldOperand(rax, JSArray::kElementsOffset)); |
| |
| // rbx: last_match_info backing store (FixedArray) |
| // rdx: number of capture registers |
| // Store the capture count. |
| __ Integer32ToSmi(kScratchRegister, rdx); |
| __ movq(FieldOperand(rbx, RegExpImpl::kLastCaptureCountOffset), |
| kScratchRegister); |
| // Store last subject and last input. |
| __ movq(rax, Operand(rsp, kSubjectOffset)); |
| __ movq(FieldOperand(rbx, RegExpImpl::kLastSubjectOffset), rax); |
| __ RecordWriteField(rbx, |
| RegExpImpl::kLastSubjectOffset, |
| rax, |
| rdi, |
| kDontSaveFPRegs); |
| __ movq(rax, Operand(rsp, kSubjectOffset)); |
| __ movq(FieldOperand(rbx, RegExpImpl::kLastInputOffset), rax); |
| __ RecordWriteField(rbx, |
| RegExpImpl::kLastInputOffset, |
| rax, |
| rdi, |
| kDontSaveFPRegs); |
| |
| // Get the static offsets vector filled by the native regexp code. |
| __ LoadAddress(rcx, |
| ExternalReference::address_of_static_offsets_vector(isolate)); |
| |
| // rbx: last_match_info backing store (FixedArray) |
| // rcx: offsets vector |
| // rdx: number of capture registers |
| Label next_capture, done; |
| // Capture register counter starts from number of capture registers and |
| // counts down until wraping after zero. |
| __ bind(&next_capture); |
| __ subq(rdx, Immediate(1)); |
| __ j(negative, &done, Label::kNear); |
| // Read the value from the static offsets vector buffer and make it a smi. |
| __ movl(rdi, Operand(rcx, rdx, times_int_size, 0)); |
| __ Integer32ToSmi(rdi, rdi); |
| // Store the smi value in the last match info. |
| __ movq(FieldOperand(rbx, |
| rdx, |
| times_pointer_size, |
| RegExpImpl::kFirstCaptureOffset), |
| rdi); |
| __ jmp(&next_capture); |
| __ bind(&done); |
| |
| // Return last match info. |
| __ movq(rax, Operand(rsp, kLastMatchInfoOffset)); |
| __ ret(4 * kPointerSize); |
| |
| __ bind(&exception); |
| // Result must now be exception. If there is no pending exception already a |
| // stack overflow (on the backtrack stack) was detected in RegExp code but |
| // haven't created the exception yet. Handle that in the runtime system. |
| // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
| ExternalReference pending_exception_address( |
| Isolate::kPendingExceptionAddress, isolate); |
| Operand pending_exception_operand = |
| masm->ExternalOperand(pending_exception_address, rbx); |
| __ movq(rax, pending_exception_operand); |
| __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); |
| __ cmpq(rax, rdx); |
| __ j(equal, &runtime); |
| __ movq(pending_exception_operand, rdx); |
| |
| __ CompareRoot(rax, Heap::kTerminationExceptionRootIndex); |
| Label termination_exception; |
| __ j(equal, &termination_exception, Label::kNear); |
| __ Throw(rax); |
| |
| __ bind(&termination_exception); |
| __ ThrowUncatchable(rax); |
| |
| // External string. Short external strings have already been ruled out. |
| // rdi: subject string (expected to be external) |
| // rbx: scratch |
| __ bind(&external_string); |
| __ movq(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
| __ movzxbl(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); |
| if (FLAG_debug_code) { |
| // Assert that we do not have a cons or slice (indirect strings) here. |
| // Sequential strings have already been ruled out. |
| __ testb(rbx, Immediate(kIsIndirectStringMask)); |
| __ Assert(zero, "external string expected, but not found"); |
| } |
| __ movq(rdi, FieldOperand(rdi, ExternalString::kResourceDataOffset)); |
| // Move the pointer so that offset-wise, it looks like a sequential string. |
| STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize); |
| __ subq(rdi, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| STATIC_ASSERT(kTwoByteStringTag == 0); |
| __ testb(rbx, Immediate(kStringEncodingMask)); |
| __ j(not_zero, &seq_ascii_string); |
| __ jmp(&seq_two_byte_string); |
| |
| // Do the runtime call to execute the regexp. |
| __ bind(&runtime); |
| __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| #endif // V8_INTERPRETED_REGEXP |
| } |
| |
| |
| void RegExpConstructResultStub::Generate(MacroAssembler* masm) { |
| const int kMaxInlineLength = 100; |
| Label slowcase; |
| Label done; |
| __ movq(r8, Operand(rsp, kPointerSize * 3)); |
| __ JumpIfNotSmi(r8, &slowcase); |
| __ SmiToInteger32(rbx, r8); |
| __ cmpl(rbx, Immediate(kMaxInlineLength)); |
| __ j(above, &slowcase); |
| // Smi-tagging is equivalent to multiplying by 2. |
| STATIC_ASSERT(kSmiTag == 0); |
| STATIC_ASSERT(kSmiTagSize == 1); |
| // Allocate RegExpResult followed by FixedArray with size in rbx. |
| // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| // Elements: [Map][Length][..elements..] |
| __ AllocateInNewSpace(JSRegExpResult::kSize + FixedArray::kHeaderSize, |
| times_pointer_size, |
| rbx, // In: Number of elements. |
| rax, // Out: Start of allocation (tagged). |
| rcx, // Out: End of allocation. |
| rdx, // Scratch register |
| &slowcase, |
| TAG_OBJECT); |
| // rax: Start of allocated area, object-tagged. |
| // rbx: Number of array elements as int32. |
| // r8: Number of array elements as smi. |
| |
| // Set JSArray map to global.regexp_result_map(). |
| __ movq(rdx, ContextOperand(rsi, Context::GLOBAL_INDEX)); |
| __ movq(rdx, FieldOperand(rdx, GlobalObject::kGlobalContextOffset)); |
| __ movq(rdx, ContextOperand(rdx, Context::REGEXP_RESULT_MAP_INDEX)); |
| __ movq(FieldOperand(rax, HeapObject::kMapOffset), rdx); |
| |
| // Set empty properties FixedArray. |
| __ LoadRoot(kScratchRegister, Heap::kEmptyFixedArrayRootIndex); |
| __ movq(FieldOperand(rax, JSObject::kPropertiesOffset), kScratchRegister); |
| |
| // Set elements to point to FixedArray allocated right after the JSArray. |
| __ lea(rcx, Operand(rax, JSRegExpResult::kSize)); |
| __ movq(FieldOperand(rax, JSObject::kElementsOffset), rcx); |
| |
| // Set input, index and length fields from arguments. |
| __ movq(r8, Operand(rsp, kPointerSize * 1)); |
| __ movq(FieldOperand(rax, JSRegExpResult::kInputOffset), r8); |
| __ movq(r8, Operand(rsp, kPointerSize * 2)); |
| __ movq(FieldOperand(rax, JSRegExpResult::kIndexOffset), r8); |
| __ movq(r8, Operand(rsp, kPointerSize * 3)); |
| __ movq(FieldOperand(rax, JSArray::kLengthOffset), r8); |
| |
| // Fill out the elements FixedArray. |
| // rax: JSArray. |
| // rcx: FixedArray. |
| // rbx: Number of elements in array as int32. |
| |
| // Set map. |
| __ LoadRoot(kScratchRegister, Heap::kFixedArrayMapRootIndex); |
| __ movq(FieldOperand(rcx, HeapObject::kMapOffset), kScratchRegister); |
| // Set length. |
| __ Integer32ToSmi(rdx, rbx); |
| __ movq(FieldOperand(rcx, FixedArray::kLengthOffset), rdx); |
| // Fill contents of fixed-array with the-hole. |
| __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); |
| __ lea(rcx, FieldOperand(rcx, FixedArray::kHeaderSize)); |
| // Fill fixed array elements with hole. |
| // rax: JSArray. |
| // rbx: Number of elements in array that remains to be filled, as int32. |
| // rcx: Start of elements in FixedArray. |
| // rdx: the hole. |
| Label loop; |
| __ testl(rbx, rbx); |
| __ bind(&loop); |
| __ j(less_equal, &done); // Jump if rcx is negative or zero. |
| __ subl(rbx, Immediate(1)); |
| __ movq(Operand(rcx, rbx, times_pointer_size, 0), rdx); |
| __ jmp(&loop); |
| |
| __ bind(&done); |
| __ ret(3 * kPointerSize); |
| |
| __ bind(&slowcase); |
| __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1); |
| } |
| |
| |
| void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm, |
| Register object, |
| Register result, |
| Register scratch1, |
| Register scratch2, |
| bool object_is_smi, |
| Label* not_found) { |
| // Use of registers. Register result is used as a temporary. |
| Register number_string_cache = result; |
| Register mask = scratch1; |
| Register scratch = scratch2; |
| |
| // Load the number string cache. |
| __ LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex); |
| |
| // Make the hash mask from the length of the number string cache. It |
| // contains two elements (number and string) for each cache entry. |
| __ SmiToInteger32( |
| mask, FieldOperand(number_string_cache, FixedArray::kLengthOffset)); |
| __ shrl(mask, Immediate(1)); |
| __ subq(mask, Immediate(1)); // Make mask. |
| |
| // Calculate the entry in the number string cache. The hash value in the |
| // number string cache for smis is just the smi value, and the hash for |
| // doubles is the xor of the upper and lower words. See |
| // Heap::GetNumberStringCache. |
| Label is_smi; |
| Label load_result_from_cache; |
| Factory* factory = masm->isolate()->factory(); |
| if (!object_is_smi) { |
| __ JumpIfSmi(object, &is_smi); |
| __ CheckMap(object, |
| factory->heap_number_map(), |
| not_found, |
| DONT_DO_SMI_CHECK); |
| |
| STATIC_ASSERT(8 == kDoubleSize); |
| __ movl(scratch, FieldOperand(object, HeapNumber::kValueOffset + 4)); |
| __ xor_(scratch, FieldOperand(object, HeapNumber::kValueOffset)); |
| GenerateConvertHashCodeToIndex(masm, scratch, mask); |
| |
| Register index = scratch; |
| Register probe = mask; |
| __ movq(probe, |
| FieldOperand(number_string_cache, |
| index, |
| times_1, |
| FixedArray::kHeaderSize)); |
| __ JumpIfSmi(probe, not_found); |
| __ movsd(xmm0, FieldOperand(object, HeapNumber::kValueOffset)); |
| __ movsd(xmm1, FieldOperand(probe, HeapNumber::kValueOffset)); |
| __ ucomisd(xmm0, xmm1); |
| __ j(parity_even, not_found); // Bail out if NaN is involved. |
| __ j(not_equal, not_found); // The cache did not contain this value. |
| __ jmp(&load_result_from_cache); |
| } |
| |
| __ bind(&is_smi); |
| __ SmiToInteger32(scratch, object); |
| GenerateConvertHashCodeToIndex(masm, scratch, mask); |
| |
| Register index = scratch; |
| // Check if the entry is the smi we are looking for. |
| __ cmpq(object, |
| FieldOperand(number_string_cache, |
| index, |
| times_1, |
| FixedArray::kHeaderSize)); |
| __ j(not_equal, not_found); |
| |
| // Get the result from the cache. |
| __ bind(&load_result_from_cache); |
| __ movq(result, |
| FieldOperand(number_string_cache, |
| index, |
| times_1, |
| FixedArray::kHeaderSize + kPointerSize)); |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->number_to_string_native(), 1); |
| } |
| |
| |
| void NumberToStringStub::GenerateConvertHashCodeToIndex(MacroAssembler* masm, |
| Register hash, |
| Register mask) { |
| __ and_(hash, mask); |
| // Each entry in string cache consists of two pointer sized fields, |
| // but times_twice_pointer_size (multiplication by 16) scale factor |
| // is not supported by addrmode on x64 platform. |
| // So we have to premultiply entry index before lookup. |
| __ shl(hash, Immediate(kPointerSizeLog2 + 1)); |
| } |
| |
| |
| void NumberToStringStub::Generate(MacroAssembler* masm) { |
| Label runtime; |
| |
| __ movq(rbx, Operand(rsp, kPointerSize)); |
| |
| // Generate code to lookup number in the number string cache. |
| GenerateLookupNumberStringCache(masm, rbx, rax, r8, r9, false, &runtime); |
| __ ret(1 * kPointerSize); |
| |
| __ bind(&runtime); |
| // Handle number to string in the runtime system if not found in the cache. |
| __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1); |
| } |
| |
| |
| static int NegativeComparisonResult(Condition cc) { |
| ASSERT(cc != equal); |
| ASSERT((cc == less) || (cc == less_equal) |
| || (cc == greater) || (cc == greater_equal)); |
| return (cc == greater || cc == greater_equal) ? LESS : GREATER; |
| } |
| |
| |
| void CompareStub::Generate(MacroAssembler* masm) { |
| ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| |
| Label check_unequal_objects, done; |
| Factory* factory = masm->isolate()->factory(); |
| |
| // Compare two smis if required. |
| if (include_smi_compare_) { |
| Label non_smi, smi_done; |
| __ JumpIfNotBothSmi(rax, rdx, &non_smi); |
| __ subq(rdx, rax); |
| __ j(no_overflow, &smi_done); |
| __ not_(rdx); // Correct sign in case of overflow. rdx cannot be 0 here. |
| __ bind(&smi_done); |
| __ movq(rax, rdx); |
| __ ret(0); |
| __ bind(&non_smi); |
| } else if (FLAG_debug_code) { |
| Label ok; |
| __ JumpIfNotSmi(rdx, &ok); |
| __ JumpIfNotSmi(rax, &ok); |
| __ Abort("CompareStub: smi operands"); |
| __ bind(&ok); |
| } |
| |
| // The compare stub returns a positive, negative, or zero 64-bit integer |
| // value in rax, corresponding to result of comparing the two inputs. |
| // NOTICE! This code is only reached after a smi-fast-case check, so |
| // it is certain that at least one operand isn't a smi. |
| |
| // Two identical objects are equal unless they are both NaN or undefined. |
| { |
| Label not_identical; |
| __ cmpq(rax, rdx); |
| __ j(not_equal, ¬_identical, Label::kNear); |
| |
| if (cc_ != equal) { |
| // Check for undefined. undefined OP undefined is false even though |
| // undefined == undefined. |
| Label check_for_nan; |
| __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex); |
| __ j(not_equal, &check_for_nan, Label::kNear); |
| __ Set(rax, NegativeComparisonResult(cc_)); |
| __ ret(0); |
| __ bind(&check_for_nan); |
| } |
| |
| // Test for NaN. Sadly, we can't just compare to FACTORY->nan_value(), |
| // so we do the second best thing - test it ourselves. |
| // Note: if cc_ != equal, never_nan_nan_ is not used. |
| // We cannot set rax to EQUAL until just before return because |
| // rax must be unchanged on jump to not_identical. |
| if (never_nan_nan_ && (cc_ == equal)) { |
| __ Set(rax, EQUAL); |
| __ ret(0); |
| } else { |
| Label heap_number; |
| // If it's not a heap number, then return equal for (in)equality operator. |
| __ Cmp(FieldOperand(rdx, HeapObject::kMapOffset), |
| factory->heap_number_map()); |
| __ j(equal, &heap_number, Label::kNear); |
| if (cc_ != equal) { |
| // Call runtime on identical objects. Otherwise return equal. |
| __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rcx); |
| __ j(above_equal, ¬_identical, Label::kNear); |
| } |
| __ Set(rax, EQUAL); |
| __ ret(0); |
| |
| __ bind(&heap_number); |
| // It is a heap number, so return equal if it's not NaN. |
| // For NaN, return 1 for every condition except greater and |
| // greater-equal. Return -1 for them, so the comparison yields |
| // false for all conditions except not-equal. |
| __ Set(rax, EQUAL); |
| __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| __ ucomisd(xmm0, xmm0); |
| __ setcc(parity_even, rax); |
| // rax is 0 for equal non-NaN heapnumbers, 1 for NaNs. |
| if (cc_ == greater_equal || cc_ == greater) { |
| __ neg(rax); |
| } |
| __ ret(0); |
| } |
| |
| __ bind(¬_identical); |
| } |
| |
| if (cc_ == equal) { // Both strict and non-strict. |
| Label slow; // Fallthrough label. |
| |
| // If we're doing a strict equality comparison, we don't have to do |
| // type conversion, so we generate code to do fast comparison for objects |
| // and oddballs. Non-smi numbers and strings still go through the usual |
| // slow-case code. |
| if (strict_) { |
| // If either is a Smi (we know that not both are), then they can only |
| // be equal if the other is a HeapNumber. If so, use the slow case. |
| { |
| Label not_smis; |
| __ SelectNonSmi(rbx, rax, rdx, ¬_smis); |
| |
| // Check if the non-smi operand is a heap number. |
| __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset), |
| factory->heap_number_map()); |
| // If heap number, handle it in the slow case. |
| __ j(equal, &slow); |
| // Return non-equal. ebx (the lower half of rbx) is not zero. |
| __ movq(rax, rbx); |
| __ ret(0); |
| |
| __ bind(¬_smis); |
| } |
| |
| // If either operand is a JSObject or an oddball value, then they are not |
| // equal since their pointers are different |
| // There is no test for undetectability in strict equality. |
| |
| // If the first object is a JS object, we have done pointer comparison. |
| STATIC_ASSERT(LAST_TYPE == LAST_SPEC_OBJECT_TYPE); |
| Label first_non_object; |
| __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rcx); |
| __ j(below, &first_non_object, Label::kNear); |
| // Return non-zero (eax (not rax) is not zero) |
| Label return_not_equal; |
| STATIC_ASSERT(kHeapObjectTag != 0); |
| __ bind(&return_not_equal); |
| __ ret(0); |
| |
| __ bind(&first_non_object); |
| // Check for oddballs: true, false, null, undefined. |
| __ CmpInstanceType(rcx, ODDBALL_TYPE); |
| __ j(equal, &return_not_equal); |
| |
| __ CmpObjectType(rdx, FIRST_SPEC_OBJECT_TYPE, rcx); |
| __ j(above_equal, &return_not_equal); |
| |
| // Check for oddballs: true, false, null, undefined. |
| __ CmpInstanceType(rcx, ODDBALL_TYPE); |
| __ j(equal, &return_not_equal); |
| |
| // Fall through to the general case. |
| } |
| __ bind(&slow); |
| } |
| |
| // Generate the number comparison code. |
| if (include_number_compare_) { |
| Label non_number_comparison; |
| Label unordered; |
| FloatingPointHelper::LoadSSE2UnknownOperands(masm, &non_number_comparison); |
| __ xorl(rax, rax); |
| __ xorl(rcx, rcx); |
| __ ucomisd(xmm0, xmm1); |
| |
| // Don't base result on EFLAGS when a NaN is involved. |
| __ j(parity_even, &unordered, Label::kNear); |
| // Return a result of -1, 0, or 1, based on EFLAGS. |
| __ setcc(above, rax); |
| __ setcc(below, rcx); |
| __ subq(rax, rcx); |
| __ ret(0); |
| |
| // If one of the numbers was NaN, then the result is always false. |
| // The cc is never not-equal. |
| __ bind(&unordered); |
| ASSERT(cc_ != not_equal); |
| if (cc_ == less || cc_ == less_equal) { |
| __ Set(rax, 1); |
| } else { |
| __ Set(rax, -1); |
| } |
| __ ret(0); |
| |
| // The number comparison code did not provide a valid result. |
| __ bind(&non_number_comparison); |
| } |
| |
| // Fast negative check for symbol-to-symbol equality. |
| Label check_for_strings; |
| if (cc_ == equal) { |
| BranchIfNonSymbol(masm, &check_for_strings, rax, kScratchRegister); |
| BranchIfNonSymbol(masm, &check_for_strings, rdx, kScratchRegister); |
| |
| // We've already checked for object identity, so if both operands |
| // are symbols they aren't equal. Register eax (not rax) already holds a |
| // non-zero value, which indicates not equal, so just return. |
| __ ret(0); |
| } |
| |
| __ bind(&check_for_strings); |
| |
| __ JumpIfNotBothSequentialAsciiStrings( |
| rdx, rax, rcx, rbx, &check_unequal_objects); |
| |
| // Inline comparison of ASCII strings. |
| if (cc_ == equal) { |
| StringCompareStub::GenerateFlatAsciiStringEquals(masm, |
| rdx, |
| rax, |
| rcx, |
| rbx); |
| } else { |
| StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
| rdx, |
| rax, |
| rcx, |
| rbx, |
| rdi, |
| r8); |
| } |
| |
| #ifdef DEBUG |
| __ Abort("Unexpected fall-through from string comparison"); |
| #endif |
| |
| __ bind(&check_unequal_objects); |
| if (cc_ == equal && !strict_) { |
| // Not strict equality. Objects are unequal if |
| // they are both JSObjects and not undetectable, |
| // and their pointers are different. |
| Label not_both_objects, return_unequal; |
| // At most one is a smi, so we can test for smi by adding the two. |
| // A smi plus a heap object has the low bit set, a heap object plus |
| // a heap object has the low bit clear. |
| STATIC_ASSERT(kSmiTag == 0); |
| STATIC_ASSERT(kSmiTagMask == 1); |
| __ lea(rcx, Operand(rax, rdx, times_1, 0)); |
| __ testb(rcx, Immediate(kSmiTagMask)); |
| __ j(not_zero, ¬_both_objects, Label::kNear); |
| __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rbx); |
| __ j(below, ¬_both_objects, Label::kNear); |
| __ CmpObjectType(rdx, FIRST_SPEC_OBJECT_TYPE, rcx); |
| __ j(below, ¬_both_objects, Label::kNear); |
| __ testb(FieldOperand(rbx, Map::kBitFieldOffset), |
| Immediate(1 << Map::kIsUndetectable)); |
| __ j(zero, &return_unequal, Label::kNear); |
| __ testb(FieldOperand(rcx, Map::kBitFieldOffset), |
| Immediate(1 << Map::kIsUndetectable)); |
| __ j(zero, &return_unequal, Label::kNear); |
| // The objects are both undetectable, so they both compare as the value |
| // undefined, and are equal. |
| __ Set(rax, EQUAL); |
| __ bind(&return_unequal); |
| // Return non-equal by returning the non-zero object pointer in rax, |
| // or return equal if we fell through to here. |
| __ ret(0); |
| __ bind(¬_both_objects); |
| } |
| |
| // Push arguments below the return address to prepare jump to builtin. |
| __ pop(rcx); |
| __ push(rdx); |
| __ push(rax); |
| |
| // Figure out which native to call and setup the arguments. |
| Builtins::JavaScript builtin; |
| if (cc_ == equal) { |
| builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| } else { |
| builtin = Builtins::COMPARE; |
| __ Push(Smi::FromInt(NegativeComparisonResult(cc_))); |
| } |
| |
| // Restore return address on the stack. |
| __ push(rcx); |
| |
| // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| // tagged as a small integer. |
| __ InvokeBuiltin(builtin, JUMP_FUNCTION); |
| } |
| |
| |
| void CompareStub::BranchIfNonSymbol(MacroAssembler* masm, |
| Label* label, |
| Register object, |
| Register scratch) { |
| __ JumpIfSmi(object, label); |
| __ movq(scratch, FieldOperand(object, HeapObject::kMapOffset)); |
| __ movzxbq(scratch, |
| FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| // Ensure that no non-strings have the symbol bit set. |
| STATIC_ASSERT(LAST_TYPE < kNotStringTag + kIsSymbolMask); |
| STATIC_ASSERT(kSymbolTag != 0); |
| __ testb(scratch, Immediate(kIsSymbolMask)); |
| __ j(zero, label); |
| } |
| |
| |
| void StackCheckStub::Generate(MacroAssembler* masm) { |
| __ TailCallRuntime(Runtime::kStackGuard, 0, 1); |
| } |
| |
| |
| void InterruptStub::Generate(MacroAssembler* masm) { |
| __ TailCallRuntime(Runtime::kInterrupt, 0, 1); |
| } |
| |
| |
| static void GenerateRecordCallTarget(MacroAssembler* masm) { |
| // Cache the called function in a global property cell. Cache states |
| // are uninitialized, monomorphic (indicated by a JSFunction), and |
| // megamorphic. |
| // rbx : cache cell for call target |
| // rdi : the function to call |
| Isolate* isolate = masm->isolate(); |
| Label initialize, done; |
| |
| // Load the cache state into rcx. |
| __ movq(rcx, FieldOperand(rbx, JSGlobalPropertyCell::kValueOffset)); |
| |
| // A monomorphic cache hit or an already megamorphic state: invoke the |
| // function without changing the state. |
| __ cmpq(rcx, rdi); |
| __ j(equal, &done, Label::kNear); |
| __ Cmp(rcx, TypeFeedbackCells::MegamorphicSentinel(isolate)); |
| __ j(equal, &done, Label::kNear); |
| |
| // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
| // megamorphic. |
| __ Cmp(rcx, TypeFeedbackCells::UninitializedSentinel(isolate)); |
| __ j(equal, &initialize, Label::kNear); |
| // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| // write-barrier is needed. |
| __ Move(FieldOperand(rbx, JSGlobalPropertyCell::kValueOffset), |
| TypeFeedbackCells::MegamorphicSentinel(isolate)); |
| __ jmp(&done, Label::kNear); |
| |
| // An uninitialized cache is patched with the function. |
| __ bind(&initialize); |
| __ movq(FieldOperand(rbx, JSGlobalPropertyCell::kValueOffset), rdi); |
| // No need for a write barrier here - cells are rescanned. |
| |
| __ bind(&done); |
| } |
| |
| |
| void CallFunctionStub::Generate(MacroAssembler* masm) { |
| // rdi : the function to call |
| // rbx : cache cell for call target |
| Label slow, non_function; |
| |
| // The receiver might implicitly be the global object. This is |
| // indicated by passing the hole as the receiver to the call |
| // function stub. |
| if (ReceiverMightBeImplicit()) { |
| Label call; |
| // Get the receiver from the stack. |
| // +1 ~ return address |
| __ movq(rax, Operand(rsp, (argc_ + 1) * kPointerSize)); |
| // Call as function is indicated with the hole. |
| __ CompareRoot(rax, Heap::kTheHoleValueRootIndex); |
| __ j(not_equal, &call, Label::kNear); |
| // Patch the receiver on the stack with the global receiver object. |
| __ movq(rbx, GlobalObjectOperand()); |
| __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset)); |
| __ movq(Operand(rsp, (argc_ + 1) * kPointerSize), rbx); |
| __ bind(&call); |
| } |
| |
| // Check that the function really is a JavaScript function. |
| __ JumpIfSmi(rdi, &non_function); |
| // Goto slow case if we do not have a function. |
| __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| __ j(not_equal, &slow); |
| |
| // Fast-case: Just invoke the function. |
| ParameterCount actual(argc_); |
| |
| if (ReceiverMightBeImplicit()) { |
| Label call_as_function; |
| __ CompareRoot(rax, Heap::kTheHoleValueRootIndex); |
| __ j(equal, &call_as_function); |
| __ InvokeFunction(rdi, |
| actual, |
| JUMP_FUNCTION, |
| NullCallWrapper(), |
| CALL_AS_METHOD); |
| __ bind(&call_as_function); |
| } |
| __ InvokeFunction(rdi, |
| actual, |
| JUMP_FUNCTION, |
| NullCallWrapper(), |
| CALL_AS_FUNCTION); |
| |
| // Slow-case: Non-function called. |
| __ bind(&slow); |
| // Check for function proxy. |
| __ CmpInstanceType(rcx, JS_FUNCTION_PROXY_TYPE); |
| __ j(not_equal, &non_function); |
| __ pop(rcx); |
| __ push(rdi); // put proxy as additional argument under return address |
| __ push(rcx); |
| __ Set(rax, argc_ + 1); |
| __ Set(rbx, 0); |
| __ SetCallKind(rcx, CALL_AS_METHOD); |
| __ GetBuiltinEntry(rdx, Builtins::CALL_FUNCTION_PROXY); |
| { |
| Handle<Code> adaptor = |
| masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
| __ jmp(adaptor, RelocInfo::CODE_TARGET); |
| } |
| |
| // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| // of the original receiver from the call site). |
| __ bind(&non_function); |
| __ movq(Operand(rsp, (argc_ + 1) * kPointerSize), rdi); |
| __ Set(rax, argc_); |
| __ Set(rbx, 0); |
| __ SetCallKind(rcx, CALL_AS_METHOD); |
| __ GetBuiltinEntry(rdx, Builtins::CALL_NON_FUNCTION); |
| Handle<Code> adaptor = |
| Isolate::Current()->builtins()->ArgumentsAdaptorTrampoline(); |
| __ Jump(adaptor, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void CallConstructStub::Generate(MacroAssembler* masm) { |
| // rax : number of arguments |
| // rbx : cache cell for call target |
| // rdi : constructor function |
| Label slow, non_function_call; |
| |
| // Check that function is not a smi. |
| __ JumpIfSmi(rdi, &non_function_call); |
| // Check that function is a JSFunction. |
| __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| __ j(not_equal, &slow); |
| |
| if (RecordCallTarget()) { |
| GenerateRecordCallTarget(masm); |
| } |
| |
| // Jump to the function-specific construct stub. |
| __ movq(rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| __ movq(rbx, FieldOperand(rbx, SharedFunctionInfo::kConstructStubOffset)); |
| __ lea(rbx, FieldOperand(rbx, Code::kHeaderSize)); |
| __ jmp(rbx); |
| |
| // rdi: called object |
| // rax: number of arguments |
| // rcx: object map |
| Label do_call; |
| __ bind(&slow); |
| __ CmpInstanceType(rcx, JS_FUNCTION_PROXY_TYPE); |
| __ j(not_equal, &non_function_call); |
| __ GetBuiltinEntry(rdx, Builtins::CALL_FUNCTION_PROXY_AS_CONSTRUCTOR); |
| __ jmp(&do_call); |
| |
| __ bind(&non_function_call); |
| __ GetBuiltinEntry(rdx, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR); |
| __ bind(&do_call); |
| // Set expected number of arguments to zero (not changing rax). |
| __ Set(rbx, 0); |
| __ SetCallKind(rcx, CALL_AS_METHOD); |
| __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| |
| bool CEntryStub::NeedsImmovableCode() { |
| return false; |
| } |
| |
| |
| bool CEntryStub::IsPregenerated() { |
| #ifdef _WIN64 |
| return result_size_ == 1; |
| #else |
| return true; |
| #endif |
| } |
| |
| |
| void CodeStub::GenerateStubsAheadOfTime() { |
| CEntryStub::GenerateAheadOfTime(); |
| StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(); |
| // It is important that the store buffer overflow stubs are generated first. |
| RecordWriteStub::GenerateFixedRegStubsAheadOfTime(); |
| } |
| |
| |
| void CodeStub::GenerateFPStubs() { |
| } |
| |
| |
| void CEntryStub::GenerateAheadOfTime() { |
| CEntryStub stub(1, kDontSaveFPRegs); |
| stub.GetCode()->set_is_pregenerated(true); |
| CEntryStub save_doubles(1, kSaveFPRegs); |
| save_doubles.GetCode()->set_is_pregenerated(true); |
| } |
| |
| |
| void CEntryStub::GenerateCore(MacroAssembler* masm, |
| Label* throw_normal_exception, |
| Label* throw_termination_exception, |
| Label* throw_out_of_memory_exception, |
| bool do_gc, |
| bool always_allocate_scope) { |
| // rax: result parameter for PerformGC, if any. |
| // rbx: pointer to C function (C callee-saved). |
| // rbp: frame pointer (restored after C call). |
| // rsp: stack pointer (restored after C call). |
| // r14: number of arguments including receiver (C callee-saved). |
| // r15: pointer to the first argument (C callee-saved). |
| // This pointer is reused in LeaveExitFrame(), so it is stored in a |
| // callee-saved register. |
| |
| // Simple results returned in rax (both AMD64 and Win64 calling conventions). |
| // Complex results must be written to address passed as first argument. |
| // AMD64 calling convention: a struct of two pointers in rax+rdx |
| |
| // Check stack alignment. |
| if (FLAG_debug_code) { |
| __ CheckStackAlignment(); |
| } |
| |
| if (do_gc) { |
| // Pass failure code returned from last attempt as first argument to |
| // PerformGC. No need to use PrepareCallCFunction/CallCFunction here as the |
| // stack is known to be aligned. This function takes one argument which is |
| // passed in register. |
| #ifdef _WIN64 |
| __ movq(rcx, rax); |
| #else // _WIN64 |
| __ movq(rdi, rax); |
| #endif |
| __ movq(kScratchRegister, |
| FUNCTION_ADDR(Runtime::PerformGC), |
| RelocInfo::RUNTIME_ENTRY); |
| __ call(kScratchRegister); |
| } |
| |
| ExternalReference scope_depth = |
| ExternalReference::heap_always_allocate_scope_depth(masm->isolate()); |
| if (always_allocate_scope) { |
| Operand scope_depth_operand = masm->ExternalOperand(scope_depth); |
| __ incl(scope_depth_operand); |
| } |
| |
| // Call C function. |
| #ifdef _WIN64 |
| // Windows 64-bit ABI passes arguments in rcx, rdx, r8, r9 |
| // Store Arguments object on stack, below the 4 WIN64 ABI parameter slots. |
| __ movq(StackSpaceOperand(0), r14); // argc. |
| __ movq(StackSpaceOperand(1), r15); // argv. |
| if (result_size_ < 2) { |
| // Pass a pointer to the Arguments object as the first argument. |
| // Return result in single register (rax). |
| __ lea(rcx, StackSpaceOperand(0)); |
| __ LoadAddress(rdx, ExternalReference::isolate_address()); |
| } else { |
| ASSERT_EQ(2, result_size_); |
| // Pass a pointer to the result location as the first argument. |
| __ lea(rcx, StackSpaceOperand(2)); |
| // Pass a pointer to the Arguments object as the second argument. |
| __ lea(rdx, StackSpaceOperand(0)); |
| __ LoadAddress(r8, ExternalReference::isolate_address()); |
| } |
| |
| #else // _WIN64 |
| // GCC passes arguments in rdi, rsi, rdx, rcx, r8, r9. |
| __ movq(rdi, r14); // argc. |
| __ movq(rsi, r15); // argv. |
| __ movq(rdx, ExternalReference::isolate_address()); |
| #endif |
| __ call(rbx); |
| // Result is in rax - do not destroy this register! |
| |
| if (always_allocate_scope) { |
| Operand scope_depth_operand = masm->ExternalOperand(scope_depth); |
| __ decl(scope_depth_operand); |
| } |
| |
| // Check for failure result. |
| Label failure_returned; |
| STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| #ifdef _WIN64 |
| // If return value is on the stack, pop it to registers. |
| if (result_size_ > 1) { |
| ASSERT_EQ(2, result_size_); |
| // Read result values stored on stack. Result is stored |
| // above the four argument mirror slots and the two |
| // Arguments object slots. |
| __ movq(rax, Operand(rsp, 6 * kPointerSize)); |
| __ movq(rdx, Operand(rsp, 7 * kPointerSize)); |
| } |
| #endif |
| __ lea(rcx, Operand(rax, 1)); |
| // Lower 2 bits of rcx are 0 iff rax has failure tag. |
| __ testl(rcx, Immediate(kFailureTagMask)); |
| __ j(zero, &failure_returned); |
| |
| // Exit the JavaScript to C++ exit frame. |
| __ LeaveExitFrame(save_doubles_); |
| __ ret(0); |
| |
| // Handling of failure. |
| __ bind(&failure_returned); |
| |
| Label retry; |
| // If the returned exception is RETRY_AFTER_GC continue at retry label |
| STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); |
| __ testl(rax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| __ j(zero, &retry, Label::kNear); |
| |
| // Special handling of out of memory exceptions. |
| __ movq(kScratchRegister, Failure::OutOfMemoryException(), RelocInfo::NONE); |
| __ cmpq(rax, kScratchRegister); |
| __ j(equal, throw_out_of_memory_exception); |
| |
| // Retrieve the pending exception and clear the variable. |
| ExternalReference pending_exception_address( |
| Isolate::kPendingExceptionAddress, masm->isolate()); |
| Operand pending_exception_operand = |
| masm->ExternalOperand(pending_exception_address); |
| __ movq(rax, pending_exception_operand); |
| __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); |
| __ movq(pending_exception_operand, rdx); |
| |
| // Special handling of termination exceptions which are uncatchable |
| // by javascript code. |
| __ CompareRoot(rax, Heap::kTerminationExceptionRootIndex); |
| __ j(equal, throw_termination_exception); |
| |
| // Handle normal exception. |
| __ jmp(throw_normal_exception); |
| |
| // Retry. |
| __ bind(&retry); |
| } |
| |
| |
| void CEntryStub::Generate(MacroAssembler* masm) { |
| // rax: number of arguments including receiver |
| // rbx: pointer to C function (C callee-saved) |
| // rbp: frame pointer of calling JS frame (restored after C call) |
| // rsp: stack pointer (restored after C call) |
| // rsi: current context (restored) |
| |
| // NOTE: Invocations of builtins may return failure objects |
| // instead of a proper result. The builtin entry handles |
| // this by performing a garbage collection and retrying the |
| // builtin once. |
| |
| // Enter the exit frame that transitions from JavaScript to C++. |
| #ifdef _WIN64 |
| int arg_stack_space = (result_size_ < 2 ? 2 : 4); |
| #else |
| int arg_stack_space = 0; |
| #endif |
| __ EnterExitFrame(arg_stack_space, save_doubles_); |
| |
| // rax: Holds the context at this point, but should not be used. |
| // On entry to code generated by GenerateCore, it must hold |
| // a failure result if the collect_garbage argument to GenerateCore |
| // is true. This failure result can be the result of code |
| // generated by a previous call to GenerateCore. The value |
| // of rax is then passed to Runtime::PerformGC. |
| // rbx: pointer to builtin function (C callee-saved). |
| // rbp: frame pointer of exit frame (restored after C call). |
| // rsp: stack pointer (restored after C call). |
| // r14: number of arguments including receiver (C callee-saved). |
| // r15: argv pointer (C callee-saved). |
| |
| Label throw_normal_exception; |
| Label throw_termination_exception; |
| Label throw_out_of_memory_exception; |
| |
| // Call into the runtime system. |
| GenerateCore(masm, |
| &throw_normal_exception, |
| &throw_termination_exception, |
| &throw_out_of_memory_exception, |
| false, |
| false); |
| |
| // Do space-specific GC and retry runtime call. |
| GenerateCore(masm, |
| &throw_normal_exception, |
| &throw_termination_exception, |
| &throw_out_of_memory_exception, |
| true, |
| false); |
| |
| // Do full GC and retry runtime call one final time. |
| Failure* failure = Failure::InternalError(); |
| __ movq(rax, failure, RelocInfo::NONE); |
| GenerateCore(masm, |
| &throw_normal_exception, |
| &throw_termination_exception, |
| &throw_out_of_memory_exception, |
| true, |
| true); |
| |
| __ bind(&throw_out_of_memory_exception); |
| // Set external caught exception to false. |
| Isolate* isolate = masm->isolate(); |
| ExternalReference external_caught(Isolate::kExternalCaughtExceptionAddress, |
| isolate); |
| __ Set(rax, static_cast<int64_t>(false)); |
| __ Store(external_caught, rax); |
| |
| // Set pending exception and rax to out of memory exception. |
| ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
| isolate); |
| __ movq(rax, Failure::OutOfMemoryException(), RelocInfo::NONE); |
| __ Store(pending_exception, rax); |
| // Fall through to the next label. |
| |
| __ bind(&throw_termination_exception); |
| __ ThrowUncatchable(rax); |
| |
| __ bind(&throw_normal_exception); |
| __ Throw(rax); |
| } |
| |
| |
| void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| Label invoke, handler_entry, exit; |
| Label not_outermost_js, not_outermost_js_2; |
| { // NOLINT. Scope block confuses linter. |
| MacroAssembler::NoRootArrayScope uninitialized_root_register(masm); |
| // Set up frame. |
| __ push(rbp); |
| __ movq(rbp, rsp); |
| |
| // Push the stack frame type marker twice. |
| int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
| // Scratch register is neither callee-save, nor an argument register on any |
| // platform. It's free to use at this point. |
| // Cannot use smi-register for loading yet. |
| __ movq(kScratchRegister, |
| reinterpret_cast<uint64_t>(Smi::FromInt(marker)), |
| RelocInfo::NONE); |
| __ push(kScratchRegister); // context slot |
| __ push(kScratchRegister); // function slot |
| // Save callee-saved registers (X64/Win64 calling conventions). |
| __ push(r12); |
| __ push(r13); |
| __ push(r14); |
| __ push(r15); |
| #ifdef _WIN64 |
| __ push(rdi); // Only callee save in Win64 ABI, argument in AMD64 ABI. |
| __ push(rsi); // Only callee save in Win64 ABI, argument in AMD64 ABI. |
| #endif |
| __ push(rbx); |
| // TODO(X64): On Win64, if we ever use XMM6-XMM15, the low low 64 bits are |
| // callee save as well. |
| |
| // Set up the roots and smi constant registers. |
| // Needs to be done before any further smi loads. |
| __ InitializeSmiConstantRegister(); |
| __ InitializeRootRegister(); |
| } |
| |
| Isolate* isolate = masm->isolate(); |
| |
| // Save copies of the top frame descriptor on the stack. |
| ExternalReference c_entry_fp(Isolate::kCEntryFPAddress, isolate); |
| { |
| Operand c_entry_fp_operand = masm->ExternalOperand(c_entry_fp); |
| __ push(c_entry_fp_operand); |
| } |
| |
| // If this is the outermost JS call, set js_entry_sp value. |
| ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate); |
| __ Load(rax, js_entry_sp); |
| __ testq(rax, rax); |
| __ j(not_zero, ¬_outermost_js); |
| __ Push(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| __ movq(rax, rbp); |
| __ Store(js_entry_sp, rax); |
| Label cont; |
| __ jmp(&cont); |
| __ bind(¬_outermost_js); |
| __ Push(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)); |
| __ bind(&cont); |
| |
| // Jump to a faked try block that does the invoke, with a faked catch |
| // block that sets the pending exception. |
| __ jmp(&invoke); |
| __ bind(&handler_entry); |
| handler_offset_ = handler_entry.pos(); |
| // Caught exception: Store result (exception) in the pending exception |
| // field in the JSEnv and return a failure sentinel. |
| ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
| isolate); |
| __ Store(pending_exception, rax); |
| __ movq(rax, Failure::Exception(), RelocInfo::NONE); |
| __ jmp(&exit); |
| |
| // Invoke: Link this frame into the handler chain. There's only one |
| // handler block in this code object, so its index is 0. |
| __ bind(&invoke); |
| __ PushTryHandler(StackHandler::JS_ENTRY, 0); |
| |
| // Clear any pending exceptions. |
| __ LoadRoot(rax, Heap::kTheHoleValueRootIndex); |
| __ Store(pending_exception, rax); |
| |
| // Fake a receiver (NULL). |
| __ push(Immediate(0)); // receiver |
| |
| // Invoke the function by calling through JS entry trampoline builtin and |
| // pop the faked function when we return. We load the address from an |
| // external reference instead of inlining the call target address directly |
| // in the code, because the builtin stubs may not have been generated yet |
| // at the time this code is generated. |
| if (is_construct) { |
| ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline, |
| isolate); |
| __ Load(rax, construct_entry); |
| } else { |
| ExternalReference entry(Builtins::kJSEntryTrampoline, isolate); |
| __ Load(rax, entry); |
| } |
| __ lea(kScratchRegister, FieldOperand(rax, Code::kHeaderSize)); |
| __ call(kScratchRegister); |
| |
| // Unlink this frame from the handler chain. |
| __ PopTryHandler(); |
| |
| __ bind(&exit); |
| // Check if the current stack frame is marked as the outermost JS frame. |
| __ pop(rbx); |
| __ Cmp(rbx, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| __ j(not_equal, ¬_outermost_js_2); |
| __ movq(kScratchRegister, js_entry_sp); |
| __ movq(Operand(kScratchRegister, 0), Immediate(0)); |
| __ bind(¬_outermost_js_2); |
| |
| // Restore the top frame descriptor from the stack. |
| { Operand c_entry_fp_operand = masm->ExternalOperand(c_entry_fp); |
| __ pop(c_entry_fp_operand); |
| } |
| |
| // Restore callee-saved registers (X64 conventions). |
| __ pop(rbx); |
| #ifdef _WIN64 |
| // Callee save on in Win64 ABI, arguments/volatile in AMD64 ABI. |
| __ pop(rsi); |
| __ pop(rdi); |
| #endif |
| __ pop(r15); |
| __ pop(r14); |
| __ pop(r13); |
| __ pop(r12); |
| __ addq(rsp, Immediate(2 * kPointerSize)); // remove markers |
| |
| // Restore frame pointer and return. |
| __ pop(rbp); |
| __ ret(0); |
| } |
| |
| |
| void InstanceofStub::Generate(MacroAssembler* masm) { |
| // Implements "value instanceof function" operator. |
| // Expected input state with no inline cache: |
| // rsp[0] : return address |
| // rsp[1] : function pointer |
| // rsp[2] : value |
| // Expected input state with an inline one-element cache: |
| // rsp[0] : return address |
| // rsp[1] : offset from return address to location of inline cache |
| // rsp[2] : function pointer |
| // rsp[3] : value |
| // Returns a bitwise zero to indicate that the value |
| // is and instance of the function and anything else to |
| // indicate that the value is not an instance. |
| |
| static const int kOffsetToMapCheckValue = 2; |
| static const int kOffsetToResultValue = 18; |
| // The last 4 bytes of the instruction sequence |
| // movq(rdi, FieldOperand(rax, HeapObject::kMapOffset)) |
| // Move(kScratchRegister, FACTORY->the_hole_value()) |
| // in front of the hole value address. |
| static const unsigned int kWordBeforeMapCheckValue = 0xBA49FF78; |
| // The last 4 bytes of the instruction sequence |
| // __ j(not_equal, &cache_miss); |
| // __ LoadRoot(ToRegister(instr->result()), Heap::kTheHoleValueRootIndex); |
| // before the offset of the hole value in the root array. |
| static const unsigned int kWordBeforeResultValue = 0x458B4909; |
| // Only the inline check flag is supported on X64. |
| ASSERT(flags_ == kNoFlags || HasCallSiteInlineCheck()); |
| int extra_stack_space = HasCallSiteInlineCheck() ? kPointerSize : 0; |
| |
| // Get the object - go slow case if it's a smi. |
| Label slow; |
| |
| __ movq(rax, Operand(rsp, 2 * kPointerSize + extra_stack_space)); |
| __ JumpIfSmi(rax, &slow); |
| |
| // Check that the left hand is a JS object. Leave its map in rax. |
| __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rax); |
| __ j(below, &slow); |
| __ CmpInstanceType(rax, LAST_SPEC_OBJECT_TYPE); |
| __ j(above, &slow); |
| |
| // Get the prototype of the function. |
| __ movq(rdx, Operand(rsp, 1 * kPointerSize + extra_stack_space)); |
| // rdx is function, rax is map. |
| |
| // If there is a call site cache don't look in the global cache, but do the |
| // real lookup and update the call site cache. |
| if (!HasCallSiteInlineCheck()) { |
| // Look up the function and the map in the instanceof cache. |
| Label miss; |
| __ CompareRoot(rdx, Heap::kInstanceofCacheFunctionRootIndex); |
| __ j(not_equal, &miss, Label::kNear); |
| __ CompareRoot(rax, Heap::kInstanceofCacheMapRootIndex); |
| __ j(not_equal, &miss, Label::kNear); |
| __ LoadRoot(rax, Heap::kInstanceofCacheAnswerRootIndex); |
| __ ret(2 * kPointerSize); |
| __ bind(&miss); |
| } |
| |
| __ TryGetFunctionPrototype(rdx, rbx, &slow, true); |
| |
| // Check that the function prototype is a JS object. |
| __ JumpIfSmi(rbx, &slow); |
| __ CmpObjectType(rbx, FIRST_SPEC_OBJECT_TYPE, kScratchRegister); |
| __ j(below, &slow); |
| __ CmpInstanceType(kScratchRegister, LAST_SPEC_OBJECT_TYPE); |
| __ j(above, &slow); |
| |
| // Register mapping: |
| // rax is object map. |
| // rdx is function. |
| // rbx is function prototype. |
| if (!HasCallSiteInlineCheck()) { |
| __ StoreRoot(rdx, Heap::kInstanceofCacheFunctionRootIndex); |
| __ StoreRoot(rax, Heap::kInstanceofCacheMapRootIndex); |
| } else { |
| // Get return address and delta to inlined map check. |
| __ movq(kScratchRegister, Operand(rsp, 0 * kPointerSize)); |
| __ subq(kScratchRegister, Operand(rsp, 1 * kPointerSize)); |
| if (FLAG_debug_code) { |
| __ movl(rdi, Immediate(kWordBeforeMapCheckValue)); |
| __ cmpl(Operand(kScratchRegister, kOffsetToMapCheckValue - 4), rdi); |
| __ Assert(equal, "InstanceofStub unexpected call site cache (check)."); |
| } |
| __ movq(kScratchRegister, |
| Operand(kScratchRegister, kOffsetToMapCheckValue)); |
| __ movq(Operand(kScratchRegister, 0), rax); |
| } |
| |
| __ movq(rcx, FieldOperand(rax, Map::kPrototypeOffset)); |
| |
| // Loop through the prototype chain looking for the function prototype. |
| Label loop, is_instance, is_not_instance; |
| __ LoadRoot(kScratchRegister, Heap::kNullValueRootIndex); |
| __ bind(&loop); |
| __ cmpq(rcx, rbx); |
| __ j(equal, &is_instance, Label::kNear); |
| __ cmpq(rcx, kScratchRegister); |
| // The code at is_not_instance assumes that kScratchRegister contains a |
| // non-zero GCable value (the null object in this case). |
| __ j(equal, &is_not_instance, Label::kNear); |
| __ movq(rcx, FieldOperand(rcx, HeapObject::kMapOffset)); |
| __ movq(rcx, FieldOperand(rcx, Map::kPrototypeOffset)); |
| __ jmp(&loop); |
| |
| __ bind(&is_instance); |
| if (!HasCallSiteInlineCheck()) { |
| __ xorl(rax, rax); |
| // Store bitwise zero in the cache. This is a Smi in GC terms. |
| STATIC_ASSERT(kSmiTag == 0); |
| __ StoreRoot(rax, Heap::kInstanceofCacheAnswerRootIndex); |
| } else { |
| // Store offset of true in the root array at the inline check site. |
| int true_offset = 0x100 + |
| (Heap::kTrueValueRootIndex << kPointerSizeLog2) - kRootRegisterBias; |
| // Assert it is a 1-byte signed value. |
| ASSERT(true_offset >= 0 && true_offset < 0x100); |
| __ movl(rax, Immediate(true_offset)); |
| __ movq(kScratchRegister, Operand(rsp, 0 * kPointerSize)); |
| __ subq(kScratchRegister, Operand(rsp, 1 * kPointerSize)); |
| __ movb(Operand(kScratchRegister, kOffsetToResultValue), rax); |
| if (FLAG_debug_code) { |
| __ movl(rax, Immediate(kWordBeforeResultValue)); |
| __ cmpl(Operand(kScratchRegister, kOffsetToResultValue - 4), rax); |
| __ Assert(equal, "InstanceofStub unexpected call site cache (mov)."); |
| } |
| __ Set(rax, 0); |
| } |
| __ ret(2 * kPointerSize + extra_stack_space); |
| |
| __ bind(&is_not_instance); |
| if (!HasCallSiteInlineCheck()) { |
| // We have to store a non-zero value in the cache. |
| __ StoreRoot(kScratchRegister, Heap::kInstanceofCacheAnswerRootIndex); |
| } else { |
| // Store offset of false in the root array at the inline check site. |
| int false_offset = 0x100 + |
| (Heap::kFalseValueRootIndex << kPointerSizeLog2) - kRootRegisterBias; |
| // Assert it is a 1-byte signed value. |
| ASSERT(false_offset >= 0 && false_offset < 0x100); |
| __ movl(rax, Immediate(false_offset)); |
| __ movq(kScratchRegister, Operand(rsp, 0 * kPointerSize)); |
| __ subq(kScratchRegister, Operand(rsp, 1 * kPointerSize)); |
| __ movb(Operand(kScratchRegister, kOffsetToResultValue), rax); |
| if (FLAG_debug_code) { |
| __ movl(rax, Immediate(kWordBeforeResultValue)); |
| __ cmpl(Operand(kScratchRegister, kOffsetToResultValue - 4), rax); |
| __ Assert(equal, "InstanceofStub unexpected call site cache (mov)"); |
| } |
| } |
| __ ret(2 * kPointerSize + extra_stack_space); |
| |
| // Slow-case: Go through the JavaScript implementation. |
| __ bind(&slow); |
| if (HasCallSiteInlineCheck()) { |
| // Remove extra value from the stack. |
| __ pop(rcx); |
| __ pop(rax); |
| __ push(rcx); |
| } |
| __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
| } |
| |
| |
| // Passing arguments in registers is not supported. |
| Register InstanceofStub::left() { return no_reg; } |
| |
| |
| Register InstanceofStub::right() { return no_reg; } |
| |
| |
| int CompareStub::MinorKey() { |
| // Encode the three parameters in a unique 16 bit value. To avoid duplicate |
| // stubs the never NaN NaN condition is only taken into account if the |
| // condition is equals. |
| ASSERT(static_cast<unsigned>(cc_) < (1 << 12)); |
| ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| return ConditionField::encode(static_cast<unsigned>(cc_)) |
| | RegisterField::encode(false) // lhs_ and rhs_ are not used |
| | StrictField::encode(strict_) |
| | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false) |
| | IncludeNumberCompareField::encode(include_number_compare_) |
| | IncludeSmiCompareField::encode(include_smi_compare_); |
| } |
| |
| |
| // Unfortunately you have to run without snapshots to see most of these |
| // names in the profile since most compare stubs end up in the snapshot. |
| void CompareStub::PrintName(StringStream* stream) { |
| ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| const char* cc_name; |
| switch (cc_) { |
| case less: cc_name = "LT"; break; |
| case greater: cc_name = "GT"; break; |
| case less_equal: cc_name = "LE"; break; |
| case greater_equal: cc_name = "GE"; break; |
| case equal: cc_name = "EQ"; break; |
| case not_equal: cc_name = "NE"; break; |
| default: cc_name = "UnknownCondition"; break; |
| } |
| bool is_equality = cc_ == equal || cc_ == not_equal; |
| stream->Add("CompareStub_%s", cc_name); |
| if (strict_ && is_equality) stream->Add("_STRICT"); |
| if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN"); |
| if (!include_number_compare_) stream->Add("_NO_NUMBER"); |
| if (!include_smi_compare_) stream->Add("_NO_SMI"); |
| } |
| |
| |
| // ------------------------------------------------------------------------- |
| // StringCharCodeAtGenerator |
| |
| void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| Label flat_string; |
| Label ascii_string; |
| Label got_char_code; |
| Label sliced_string; |
| |
| // If the receiver is a smi trigger the non-string case. |
| __ JumpIfSmi(object_, receiver_not_string_); |
| |
| // Fetch the instance type of the receiver into result register. |
| __ movq(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| __ movzxbl(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| // If the receiver is not a string trigger the non-string case. |
| __ testb(result_, Immediate(kIsNotStringMask)); |
| __ j(not_zero, receiver_not_string_); |
| |
| // If the index is non-smi trigger the non-smi case. |
| __ JumpIfNotSmi(index_, &index_not_smi_); |
| __ bind(&got_smi_index_); |
| |
| // Check for index out of range. |
| __ SmiCompare(index_, FieldOperand(object_, String::kLengthOffset)); |
| __ j(above_equal, index_out_of_range_); |
| |
| __ SmiToInteger32(index_, index_); |
| |
| StringCharLoadGenerator::Generate( |
| masm, object_, index_, result_, &call_runtime_); |
| |
| __ Integer32ToSmi(result_, result_); |
| __ bind(&exit_); |
| } |
| |
| |
| void StringCharCodeAtGenerator::GenerateSlow( |
| MacroAssembler* masm, |
| const RuntimeCallHelper& call_helper) { |
| __ Abort("Unexpected fallthrough to CharCodeAt slow case"); |
| |
| Factory* factory = masm->isolate()->factory(); |
| // Index is not a smi. |
| __ bind(&index_not_smi_); |
| // If index is a heap number, try converting it to an integer. |
| __ CheckMap(index_, |
| factory->heap_number_map(), |
| index_not_number_, |
| DONT_DO_SMI_CHECK); |
| call_helper.BeforeCall(masm); |
| __ push(object_); |
| __ push(index_); // Consumed by runtime conversion function. |
| if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| } else { |
| ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| // NumberToSmi discards numbers that are not exact integers. |
| __ CallRuntime(Runtime::kNumberToSmi, 1); |
| } |
| if (!index_.is(rax)) { |
| // Save the conversion result before the pop instructions below |
| // have a chance to overwrite it. |
| __ movq(index_, rax); |
| } |
| __ pop(object_); |
| // Reload the instance type. |
| __ movq(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| __ movzxbl(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| call_helper.AfterCall(masm); |
| // If index is still not a smi, it must be out of range. |
| __ JumpIfNotSmi(index_, index_out_of_range_); |
| // Otherwise, return to the fast path. |
| __ jmp(&got_smi_index_); |
| |
| // Call runtime. We get here when the receiver is a string and the |
| // index is a number, but the code of getting the actual character |
| // is too complex (e.g., when the string needs to be flattened). |
| __ bind(&call_runtime_); |
| call_helper.BeforeCall(masm); |
| __ push(object_); |
| __ Integer32ToSmi(index_, index_); |
| __ push(index_); |
| __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| if (!result_.is(rax)) { |
| __ movq(result_, rax); |
| } |
| call_helper.AfterCall(masm); |
| __ jmp(&exit_); |
| |
| __ Abort("Unexpected fallthrough from CharCodeAt slow case"); |
| } |
| |
| |
| // ------------------------------------------------------------------------- |
| // StringCharFromCodeGenerator |
| |
| void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| __ JumpIfNotSmi(code_, &slow_case_); |
| __ SmiCompare(code_, Smi::FromInt(String::kMaxAsciiCharCode)); |
| __ j(above, &slow_case_); |
| |
| __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
| SmiIndex index = masm->SmiToIndex(kScratchRegister, code_, kPointerSizeLog2); |
| __ movq(result_, FieldOperand(result_, index.reg, index.scale, |
| FixedArray::kHeaderSize)); |
| __ CompareRoot(result_, Heap::kUndefinedValueRootIndex); |
| __ j(equal, &slow_case_); |
| __ bind(&exit_); |
| } |
| |
| |
| void StringCharFromCodeGenerator::GenerateSlow( |
| MacroAssembler* masm, |
| const RuntimeCallHelper& call_helper) { |
| __ Abort("Unexpected fallthrough to CharFromCode slow case"); |
| |
| __ bind(&slow_case_); |
| call_helper.BeforeCall(masm); |
| __ push(code_); |
| __ CallRuntime(Runtime::kCharFromCode, 1); |
| if (!result_.is(rax)) { |
| __ movq(result_, rax); |
| } |
| call_helper.AfterCall(masm); |
| __ jmp(&exit_); |
| |
| __ Abort("Unexpected fallthrough from CharFromCode slow case"); |
| } |
| |
| |
| // ------------------------------------------------------------------------- |
| // StringCharAtGenerator |
| |
| void StringCharAtGenerator::GenerateFast(MacroAssembler* masm) { |
| char_code_at_generator_.GenerateFast(masm); |
| char_from_code_generator_.GenerateFast(masm); |
| } |
| |
| |
| void StringCharAtGenerator::GenerateSlow( |
| MacroAssembler* masm, |
| const RuntimeCallHelper& call_helper) { |
| char_code_at_generator_.GenerateSlow(masm, call_helper); |
| char_from_code_generator_.GenerateSlow(masm, call_helper); |
| } |
| |
| |
| void StringAddStub::Generate(MacroAssembler* masm) { |
| Label call_runtime, call_builtin; |
| Builtins::JavaScript builtin_id = Builtins::ADD; |
| |
| // Load the two arguments. |
| __ movq(rax, Operand(rsp, 2 * kPointerSize)); // First argument (left). |
| __ movq(rdx, Operand(rsp, 1 * kPointerSize)); // Second argument (right). |
| |
| // Make sure that both arguments are strings if not known in advance. |
| if (flags_ == NO_STRING_ADD_FLAGS) { |
| __ JumpIfSmi(rax, &call_runtime); |
| __ CmpObjectType(rax, FIRST_NONSTRING_TYPE, r8); |
| __ j(above_equal, &call_runtime); |
| |
| // First argument is a a string, test second. |
| __ JumpIfSmi(rdx, &call_runtime); |
| __ CmpObjectType(rdx, FIRST_NONSTRING_TYPE, r9); |
| __ j(above_equal, &call_runtime); |
| } else { |
| // Here at least one of the arguments is definitely a string. |
| // We convert the one that is not known to be a string. |
| if ((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) == 0) { |
| ASSERT((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) != 0); |
| GenerateConvertArgument(masm, 2 * kPointerSize, rax, rbx, rcx, rdi, |
| &call_builtin); |
| builtin_id = Builtins::STRING_ADD_RIGHT; |
| } else if ((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) == 0) { |
| ASSERT((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) != 0); |
| GenerateConvertArgument(masm, 1 * kPointerSize, rdx, rbx, rcx, rdi, |
| &call_builtin); |
| builtin_id = Builtins::STRING_ADD_LEFT; |
| } |
| } |
| |
| // Both arguments are strings. |
| // rax: first string |
| // rdx: second string |
| // Check if either of the strings are empty. In that case return the other. |
| Label second_not_zero_length, both_not_zero_length; |
| __ movq(rcx, FieldOperand(rdx, String::kLengthOffset)); |
| __ SmiTest(rcx); |
| __ j(not_zero, &second_not_zero_length, Label::kNear); |
| // Second string is empty, result is first string which is already in rax. |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->string_add_native(), 1); |
| __ ret(2 * kPointerSize); |
| __ bind(&second_not_zero_length); |
| __ movq(rbx, FieldOperand(rax, String::kLengthOffset)); |
| __ SmiTest(rbx); |
| __ j(not_zero, &both_not_zero_length, Label::kNear); |
| // First string is empty, result is second string which is in rdx. |
| __ movq(rax, rdx); |
| __ IncrementCounter(counters->string_add_native(), 1); |
| __ ret(2 * kPointerSize); |
| |
| // Both strings are non-empty. |
| // rax: first string |
| // rbx: length of first string |
| // rcx: length of second string |
| // rdx: second string |
| // r8: map of first string (if flags_ == NO_STRING_ADD_FLAGS) |
| // r9: map of second string (if flags_ == NO_STRING_ADD_FLAGS) |
| Label string_add_flat_result, longer_than_two; |
| __ bind(&both_not_zero_length); |
| |
| // If arguments where known to be strings, maps are not loaded to r8 and r9 |
| // by the code above. |
| if (flags_ != NO_STRING_ADD_FLAGS) { |
| __ movq(r8, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ movq(r9, FieldOperand(rdx, HeapObject::kMapOffset)); |
| } |
| // Get the instance types of the two strings as they will be needed soon. |
| __ movzxbl(r8, FieldOperand(r8, Map::kInstanceTypeOffset)); |
| __ movzxbl(r9, FieldOperand(r9, Map::kInstanceTypeOffset)); |
| |
| // Look at the length of the result of adding the two strings. |
| STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue / 2); |
| __ SmiAdd(rbx, rbx, rcx); |
| // Use the symbol table when adding two one character strings, as it |
| // helps later optimizations to return a symbol here. |
| __ SmiCompare(rbx, Smi::FromInt(2)); |
| __ j(not_equal, &longer_than_two); |
| |
| // Check that both strings are non-external ASCII strings. |
| __ JumpIfBothInstanceTypesAreNotSequentialAscii(r8, r9, rbx, rcx, |
| &call_runtime); |
| |
| // Get the two characters forming the sub string. |
| __ movzxbq(rbx, FieldOperand(rax, SeqAsciiString::kHeaderSize)); |
| __ movzxbq(rcx, FieldOperand(rdx, SeqAsciiString::kHeaderSize)); |
| |
| // Try to lookup two character string in symbol table. If it is not found |
| // just allocate a new one. |
| Label make_two_character_string, make_flat_ascii_string; |
| StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| masm, rbx, rcx, r14, r11, rdi, r15, &make_two_character_string); |
| __ IncrementCounter(counters->string_add_native(), 1); |
| __ ret(2 * kPointerSize); |
| |
| __ bind(&make_two_character_string); |
| __ Set(rdi, 2); |
| __ AllocateAsciiString(rax, rdi, r8, r9, r11, &call_runtime); |
| // rbx - first byte: first character |
| // rbx - second byte: *maybe* second character |
| // Make sure that the second byte of rbx contains the second character. |
| __ movzxbq(rcx, FieldOperand(rdx, SeqAsciiString::kHeaderSize)); |
| __ shll(rcx, Immediate(kBitsPerByte)); |
| __ orl(rbx, rcx); |
| // Write both characters to the new string. |
| __ movw(FieldOperand(rax, SeqAsciiString::kHeaderSize), rbx); |
| __ IncrementCounter(counters->string_add_native(), 1); |
| __ ret(2 * kPointerSize); |
| |
| __ bind(&longer_than_two); |
| // Check if resulting string will be flat. |
| __ SmiCompare(rbx, Smi::FromInt(ConsString::kMinLength)); |
| __ j(below, &string_add_flat_result); |
| // Handle exceptionally long strings in the runtime system. |
| STATIC_ASSERT((String::kMaxLength & 0x80000000) == 0); |
| __ SmiCompare(rbx, Smi::FromInt(String::kMaxLength)); |
| __ j(above, &call_runtime); |
| |
| // If result is not supposed to be flat, allocate a cons string object. If |
| // both strings are ASCII the result is an ASCII cons string. |
| // rax: first string |
| // rbx: length of resulting flat string |
| // rdx: second string |
| // r8: instance type of first string |
| // r9: instance type of second string |
| Label non_ascii, allocated, ascii_data; |
| __ movl(rcx, r8); |
| __ and_(rcx, r9); |
| STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0); |
| STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| __ testl(rcx, Immediate(kStringEncodingMask)); |
| __ j(zero, &non_ascii); |
| __ bind(&ascii_data); |
| // Allocate an ASCII cons string. |
| __ AllocateAsciiConsString(rcx, rdi, no_reg, &call_runtime); |
| __ bind(&allocated); |
| // Fill the fields of the cons string. |
| __ movq(FieldOperand(rcx, ConsString::kLengthOffset), rbx); |
| __ movq(FieldOperand(rcx, ConsString::kHashFieldOffset), |
| Immediate(String::kEmptyHashField)); |
| __ movq(FieldOperand(rcx, ConsString::kFirstOffset), rax); |
| __ movq(FieldOperand(rcx, ConsString::kSecondOffset), rdx); |
| __ movq(rax, rcx); |
| __ IncrementCounter(counters->string_add_native(), 1); |
| __ ret(2 * kPointerSize); |
| __ bind(&non_ascii); |
| // At least one of the strings is two-byte. Check whether it happens |
| // to contain only ASCII characters. |
| // rcx: first instance type AND second instance type. |
| // r8: first instance type. |
| // r9: second instance type. |
| __ testb(rcx, Immediate(kAsciiDataHintMask)); |
| __ j(not_zero, &ascii_data); |
| __ xor_(r8, r9); |
| STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0); |
| __ andb(r8, Immediate(kAsciiStringTag | kAsciiDataHintTag)); |
| __ cmpb(r8, Immediate(kAsciiStringTag | kAsciiDataHintTag)); |
| __ j(equal, &ascii_data); |
| // Allocate a two byte cons string. |
| __ AllocateTwoByteConsString(rcx, rdi, no_reg, &call_runtime); |
| __ jmp(&allocated); |
| |
| // We cannot encounter sliced strings or cons strings here since: |
| STATIC_ASSERT(SlicedString::kMinLength >= ConsString::kMinLength); |
| // Handle creating a flat result from either external or sequential strings. |
| // Locate the first characters' locations. |
| // rax: first string |
| // rbx: length of resulting flat string as smi |
| // rdx: second string |
| // r8: instance type of first string |
| // r9: instance type of first string |
| Label first_prepared, second_prepared; |
| Label first_is_sequential, second_is_sequential; |
| __ bind(&string_add_flat_result); |
| |
| __ SmiToInteger32(r14, FieldOperand(rax, SeqString::kLengthOffset)); |
| // r14: length of first string |
| STATIC_ASSERT(kSeqStringTag == 0); |
| __ testb(r8, Immediate(kStringRepresentationMask)); |
| __ j(zero, &first_is_sequential, Label::kNear); |
| // Rule out short external string and load string resource. |
| STATIC_ASSERT(kShortExternalStringTag != 0); |
| __ testb(r8, Immediate(kShortExternalStringMask)); |
| __ j(not_zero, &call_runtime); |
| __ movq(rcx, FieldOperand(rax, ExternalString::kResourceDataOffset)); |
| __ jmp(&first_prepared, Label::kNear); |
| __ bind(&first_is_sequential); |
| STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize); |
| __ lea(rcx, FieldOperand(rax, SeqAsciiString::kHeaderSize)); |
| __ bind(&first_prepared); |
| |
| // Check whether both strings have same encoding. |
| __ xorl(r8, r9); |
| __ testb(r8, Immediate(kStringEncodingMask)); |
| __ j(not_zero, &call_runtime); |
| |
| __ SmiToInteger32(r15, FieldOperand(rdx, SeqString::kLengthOffset)); |
| // r15: length of second string |
| STATIC_ASSERT(kSeqStringTag == 0); |
| __ testb(r9, Immediate(kStringRepresentationMask)); |
| __ j(zero, &second_is_sequential, Label::kNear); |
| // Rule out short external string and load string resource. |
| STATIC_ASSERT(kShortExternalStringTag != 0); |
| __ testb(r9, Immediate(kShortExternalStringMask)); |
| __ j(not_zero, &call_runtime); |
| __ movq(rdx, FieldOperand(rdx, ExternalString::kResourceDataOffset)); |
| __ jmp(&second_prepared, Label::kNear); |
| __ bind(&second_is_sequential); |
| STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize); |
| __ lea(rdx, FieldOperand(rdx, SeqAsciiString::kHeaderSize)); |
| __ bind(&second_prepared); |
| |
| Label non_ascii_string_add_flat_result; |
| // r9: instance type of second string |
| // First string and second string have the same encoding. |
| STATIC_ASSERT(kTwoByteStringTag == 0); |
| __ SmiToInteger32(rbx, rbx); |
| __ testb(r9, Immediate(kStringEncodingMask)); |
| __ j(zero, &non_ascii_string_add_flat_result); |
| |
| __ bind(&make_flat_ascii_string); |
| // Both strings are ASCII strings. As they are short they are both flat. |
| __ AllocateAsciiString(rax, rbx, rdi, r8, r9, &call_runtime); |
| // rax: result string |
| // Locate first character of result. |
| __ lea(rbx, FieldOperand(rax, SeqAsciiString::kHeaderSize)); |
| // rcx: first char of first string |
| // rbx: first character of result |
| // r14: length of first string |
| StringHelper::GenerateCopyCharacters(masm, rbx, rcx, r14, true); |
| // rbx: next character of result |
| // rdx: first char of second string |
| // r15: length of second string |
| StringHelper::GenerateCopyCharacters(masm, rbx, rdx, r15, true); |
| __ IncrementCounter(counters->string_add_native(), 1); |
| __ ret(2 * kPointerSize); |
| |
| __ bind(&non_ascii_string_add_flat_result); |
| // Both strings are ASCII strings. As they are short they are both flat. |
| __ AllocateTwoByteString(rax, rbx, rdi, r8, r9, &call_runtime); |
| // rax: result string |
| // Locate first character of result. |
| __ lea(rbx, FieldOperand(rax, SeqTwoByteString::kHeaderSize)); |
| // rcx: first char of first string |
| // rbx: first character of result |
| // r14: length of first string |
| StringHelper::GenerateCopyCharacters(masm, rbx, rcx, r14, false); |
| // rbx: next character of result |
| // rdx: first char of second string |
| // r15: length of second string |
| StringHelper::GenerateCopyCharacters(masm, rbx, rdx, r15, false); |
| __ IncrementCounter(counters->string_add_native(), 1); |
| __ ret(2 * kPointerSize); |
| |
| // Just jump to runtime to add the two strings. |
| __ bind(&call_runtime); |
| __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
| |
| if (call_builtin.is_linked()) { |
| __ bind(&call_builtin); |
| __ InvokeBuiltin(builtin_id, JUMP_FUNCTION); |
| } |
| } |
| |
| |
| void StringAddStub::GenerateConvertArgument(MacroAssembler* masm, |
| int stack_offset, |
| Register arg, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Label* slow) { |
| // First check if the argument is already a string. |
| Label not_string, done; |
| __ JumpIfSmi(arg, ¬_string); |
| __ CmpObjectType(arg, FIRST_NONSTRING_TYPE, scratch1); |
| __ j(below, &done); |
| |
| // Check the number to string cache. |
| Label not_cached; |
| __ bind(¬_string); |
| // Puts the cached result into scratch1. |
| NumberToStringStub::GenerateLookupNumberStringCache(masm, |
| arg, |
| scratch1, |
| scratch2, |
| scratch3, |
| false, |
| ¬_cached); |
| __ movq(arg, scratch1); |
| __ movq(Operand(rsp, stack_offset), arg); |
| __ jmp(&done); |
| |
| // Check if the argument is a safe string wrapper. |
| __ bind(¬_cached); |
| __ JumpIfSmi(arg, slow); |
| __ CmpObjectType(arg, JS_VALUE_TYPE, scratch1); // map -> scratch1. |
| __ j(not_equal, slow); |
| __ testb(FieldOperand(scratch1, Map::kBitField2Offset), |
| Immediate(1 << Map::kStringWrapperSafeForDefaultValueOf)); |
| __ j(zero, slow); |
| __ movq(arg, FieldOperand(arg, JSValue::kValueOffset)); |
| __ movq(Operand(rsp, stack_offset), arg); |
| |
| __ bind(&done); |
| } |
| |
| |
| void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| Register dest, |
| Register src, |
| Register count, |
| bool ascii) { |
| Label loop; |
| __ bind(&loop); |
| // This loop just copies one character at a time, as it is only used for very |
| // short strings. |
| if (ascii) { |
| __ movb(kScratchRegister, Operand(src, 0)); |
| __ movb(Operand(dest, 0), kScratchRegister); |
| __ incq(src); |
| __ incq(dest); |
| } else { |
| __ movzxwl(kScratchRegister, Operand(src, 0)); |
| __ movw(Operand(dest, 0), kScratchRegister); |
| __ addq(src, Immediate(2)); |
| __ addq(dest, Immediate(2)); |
| } |
| __ decl(count); |
| __ j(not_zero, &loop); |
| } |
| |
| |
| void StringHelper::GenerateCopyCharactersREP(MacroAssembler* masm, |
| Register dest, |
| Register src, |
| Register count, |
| bool ascii) { |
| // Copy characters using rep movs of doublewords. Align destination on 4 byte |
| // boundary before starting rep movs. Copy remaining characters after running |
| // rep movs. |
| // Count is positive int32, dest and src are character pointers. |
| ASSERT(dest.is(rdi)); // rep movs destination |
| ASSERT(src.is(rsi)); // rep movs source |
| ASSERT(count.is(rcx)); // rep movs count |
| |
| // Nothing to do for zero characters. |
| Label done; |
| __ testl(count, count); |
| __ j(zero, &done, Label::kNear); |
| |
| // Make count the number of bytes to copy. |
| if (!ascii) { |
| STATIC_ASSERT(2 == sizeof(uc16)); |
| __ addl(count, count); |
| } |
| |
| // Don't enter the rep movs if there are less than 4 bytes to copy. |
| Label last_bytes; |
| __ testl(count, Immediate(~7)); |
| __ j(zero, &last_bytes, Label::kNear); |
| |
| // Copy from edi to esi using rep movs instruction. |
| __ movl(kScratchRegister, count); |
| __ shr(count, Immediate(3)); // Number of doublewords to copy. |
| __ repmovsq(); |
| |
| // Find number of bytes left. |
| __ movl(count, kScratchRegister); |
| __ and_(count, Immediate(7)); |
| |
| // Check if there are more bytes to copy. |
| __ bind(&last_bytes); |
| __ testl(count, count); |
| __ j(zero, &done, Label::kNear); |
| |
| // Copy remaining characters. |
| Label loop; |
| __ bind(&loop); |
| __ movb(kScratchRegister, Operand(src, 0)); |
| __ movb(Operand(dest, 0), kScratchRegister); |
| __ incq(src); |
| __ incq(dest); |
| __ decl(count); |
| __ j(not_zero, &loop); |
| |
| __ bind(&done); |
| } |
| |
| void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| Register c1, |
| Register c2, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Register scratch4, |
| Label* not_found) { |
| // Register scratch3 is the general scratch register in this function. |
| Register scratch = scratch3; |
| |
| // Make sure that both characters are not digits as such strings has a |
| // different hash algorithm. Don't try to look for these in the symbol table. |
| Label not_array_index; |
| __ leal(scratch, Operand(c1, -'0')); |
| __ cmpl(scratch, Immediate(static_cast<int>('9' - '0'))); |
| __ j(above, ¬_array_index, Label::kNear); |
| __ leal(scratch, Operand(c2, -'0')); |
| __ cmpl(scratch, Immediate(static_cast<int>('9' - '0'))); |
| __ j(below_equal, not_found); |
| |
| __ bind(¬_array_index); |
| // Calculate the two character string hash. |
| Register hash = scratch1; |
| GenerateHashInit(masm, hash, c1, scratch); |
| GenerateHashAddCharacter(masm, hash, c2, scratch); |
| GenerateHashGetHash(masm, hash, scratch); |
| |
| // Collect the two characters in a register. |
| Register chars = c1; |
| __ shl(c2, Immediate(kBitsPerByte)); |
| __ orl(chars, c2); |
| |
| // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| // hash: hash of two character string. |
| |
| // Load the symbol table. |
| Register symbol_table = c2; |
| __ LoadRoot(symbol_table, Heap::kSymbolTableRootIndex); |
| |
| // Calculate capacity mask from the symbol table capacity. |
| Register mask = scratch2; |
| __ SmiToInteger32(mask, |
| FieldOperand(symbol_table, SymbolTable::kCapacityOffset)); |
| __ decl(mask); |
| |
| Register map = scratch4; |
| |
| // Registers |
| // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| // hash: hash of two character string (32-bit int) |
| // symbol_table: symbol table |
| // mask: capacity mask (32-bit int) |
| // map: - |
| // scratch: - |
| |
| // Perform a number of probes in the symbol table. |
| static const int kProbes = 4; |
| Label found_in_symbol_table; |
| Label next_probe[kProbes]; |
| Register candidate = scratch; // Scratch register contains candidate. |
| for (int i = 0; i < kProbes; i++) { |
| // Calculate entry in symbol table. |
| __ movl(scratch, hash); |
| if (i > 0) { |
| __ addl(scratch, Immediate(SymbolTable::GetProbeOffset(i))); |
| } |
| __ andl(scratch, mask); |
| |
| // Load the entry from the symbol table. |
| STATIC_ASSERT(SymbolTable::kEntrySize == 1); |
| __ movq(candidate, |
| FieldOperand(symbol_table, |
| scratch, |
| times_pointer_size, |
| SymbolTable::kElementsStartOffset)); |
| |
| // If entry is undefined no string with this hash can be found. |
| Label is_string; |
| __ CmpObjectType(candidate, ODDBALL_TYPE, map); |
| __ j(not_equal, &is_string, Label::kNear); |
| |
| __ CompareRoot(candidate, Heap::kUndefinedValueRootIndex); |
| __ j(equal, not_found); |
| // Must be the hole (deleted entry). |
| if (FLAG_debug_code) { |
| __ LoadRoot(kScratchRegister, Heap::kTheHoleValueRootIndex); |
| __ cmpq(kScratchRegister, candidate); |
| __ Assert(equal, "oddball in symbol table is not undefined or the hole"); |
| } |
| __ jmp(&next_probe[i]); |
| |
| __ bind(&is_string); |
| |
| // If length is not 2 the string is not a candidate. |
| __ SmiCompare(FieldOperand(candidate, String::kLengthOffset), |
| Smi::FromInt(2)); |
| __ j(not_equal, &next_probe[i]); |
| |
| // We use kScratchRegister as a temporary register in assumption that |
| // JumpIfInstanceTypeIsNotSequentialAscii does not use it implicitly |
| Register temp = kScratchRegister; |
| |
| // Check that the candidate is a non-external ASCII string. |
| __ movzxbl(temp, FieldOperand(map, Map::kInstanceTypeOffset)); |
| __ JumpIfInstanceTypeIsNotSequentialAscii( |
| temp, temp, &next_probe[i]); |
| |
| // Check if the two characters match. |
| __ movl(temp, FieldOperand(candidate, SeqAsciiString::kHeaderSize)); |
| __ andl(temp, Immediate(0x0000ffff)); |
| __ cmpl(chars, temp); |
| __ j(equal, &found_in_symbol_table); |
| __ bind(&next_probe[i]); |
| } |
| |
| // No matching 2 character string found by probing. |
| __ jmp(not_found); |
| |
| // Scratch register contains result when we fall through to here. |
| Register result = candidate; |
| __ bind(&found_in_symbol_table); |
| if (!result.is(rax)) { |
| __ movq(rax, result); |
| } |
| } |
| |
| |
| void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| Register hash, |
| Register character, |
| Register scratch) { |
| // hash = (seed + character) + ((seed + character) << 10); |
| __ LoadRoot(scratch, Heap::kHashSeedRootIndex); |
| __ SmiToInteger32(scratch, scratch); |
| __ addl(scratch, character); |
| __ movl(hash, scratch); |
| __ shll(scratch, Immediate(10)); |
| __ addl(hash, scratch); |
| // hash ^= hash >> 6; |
| __ movl(scratch, hash); |
| __ shrl(scratch, Immediate(6)); |
| __ xorl(hash, scratch); |
| } |
| |
| |
| void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| Register hash, |
| Register character, |
| Register scratch) { |
| // hash += character; |
| __ addl(hash, character); |
| // hash += hash << 10; |
| __ movl(scratch, hash); |
| __ shll(scratch, Immediate(10)); |
| __ addl(hash, scratch); |
| // hash ^= hash >> 6; |
| __ movl(scratch, hash); |
| __ shrl(scratch, Immediate(6)); |
| __ xorl(hash, scratch); |
| } |
| |
| |
| void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| Register hash, |
| Register scratch) { |
| // hash += hash << 3; |
| __ leal(hash, Operand(hash, hash, times_8, 0)); |
| // hash ^= hash >> 11; |
| __ movl(scratch, hash); |
| __ shrl(scratch, Immediate(11)); |
| __ xorl(hash, scratch); |
| // hash += hash << 15; |
| __ movl(scratch, hash); |
| __ shll(scratch, Immediate(15)); |
| __ addl(hash, scratch); |
| |
| __ andl(hash, Immediate(String::kHashBitMask)); |
| |
| // if (hash == 0) hash = 27; |
| Label hash_not_zero; |
| __ j(not_zero, &hash_not_zero); |
| __ Set(hash, StringHasher::kZeroHash); |
| __ bind(&hash_not_zero); |
| } |
| |
| void SubStringStub::Generate(MacroAssembler* masm) { |
| Label runtime; |
| |
| // Stack frame on entry. |
| // rsp[0]: return address |
| // rsp[8]: to |
| // rsp[16]: from |
| // rsp[24]: string |
| |
| const int kToOffset = 1 * kPointerSize; |
| const int kFromOffset = kToOffset + kPointerSize; |
| const int kStringOffset = kFromOffset + kPointerSize; |
| const int kArgumentsSize = (kStringOffset + kPointerSize) - kToOffset; |
| |
| // Make sure first argument is a string. |
| __ movq(rax, Operand(rsp, kStringOffset)); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ testl(rax, Immediate(kSmiTagMask)); |
| __ j(zero, &runtime); |
| Condition is_string = masm->IsObjectStringType(rax, rbx, rbx); |
| __ j(NegateCondition(is_string), &runtime); |
| |
| // rax: string |
| // rbx: instance type |
| // Calculate length of sub string using the smi values. |
| Label result_longer_than_two; |
| __ movq(rcx, Operand(rsp, kToOffset)); |
| __ movq(rdx, Operand(rsp, kFromOffset)); |
| __ JumpUnlessBothNonNegativeSmi(rcx, rdx, &runtime); |
| |
| __ SmiSub(rcx, rcx, rdx); // Overflow doesn't happen. |
| __ cmpq(FieldOperand(rax, String::kLengthOffset), rcx); |
| Label not_original_string; |
| __ j(not_equal, ¬_original_string, Label::kNear); |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->sub_string_native(), 1); |
| __ ret(kArgumentsSize); |
| __ bind(¬_original_string); |
| // Special handling of sub-strings of length 1 and 2. One character strings |
| // are handled in the runtime system (looked up in the single character |
| // cache). Two character strings are looked for in the symbol cache. |
| __ SmiToInteger32(rcx, rcx); |
| __ cmpl(rcx, Immediate(2)); |
| __ j(greater, &result_longer_than_two); |
| __ j(less, &runtime); |
| |
| // Sub string of length 2 requested. |
| // rax: string |
| // rbx: instance type |
| // rcx: sub string length (value is 2) |
| // rdx: from index (smi) |
| __ JumpIfInstanceTypeIsNotSequentialAscii(rbx, rbx, &runtime); |
| |
| // Get the two characters forming the sub string. |
| __ SmiToInteger32(rdx, rdx); // From index is no longer smi. |
| __ movzxbq(rbx, FieldOperand(rax, rdx, times_1, SeqAsciiString::kHeaderSize)); |
| __ movzxbq(rdi, |
| FieldOperand(rax, rdx, times_1, SeqAsciiString::kHeaderSize + 1)); |
| |
| // Try to lookup two character string in symbol table. |
| Label make_two_character_string; |
| StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| masm, rbx, rdi, r9, r11, r14, r15, &make_two_character_string); |
| __ IncrementCounter(counters->sub_string_native(), 1); |
| __ ret(3 * kPointerSize); |
| |
| __ bind(&make_two_character_string); |
| // Set up registers for allocating the two character string. |
| __ movzxwq(rbx, FieldOperand(rax, rdx, times_1, SeqAsciiString::kHeaderSize)); |
| __ AllocateAsciiString(rax, rcx, r11, r14, r15, &runtime); |
| __ movw(FieldOperand(rax, SeqAsciiString::kHeaderSize), rbx); |
| __ IncrementCounter(counters->sub_string_native(), 1); |
| __ ret(3 * kPointerSize); |
| |
| __ bind(&result_longer_than_two); |
| // rax: string |
| // rbx: instance type |
| // rcx: sub string length |
| // rdx: from index (smi) |
| // Deal with different string types: update the index if necessary |
| // and put the underlying string into edi. |
| Label underlying_unpacked, sliced_string, seq_or_external_string; |
| // If the string is not indirect, it can only be sequential or external. |
| STATIC_ASSERT(kIsIndirectStringMask == (kSlicedStringTag & kConsStringTag)); |
| STATIC_ASSERT(kIsIndirectStringMask != 0); |
| __ testb(rbx, Immediate(kIsIndirectStringMask)); |
| __ j(zero, &seq_or_external_string, Label::kNear); |
| |
| __ testb(rbx, Immediate(kSlicedNotConsMask)); |
| __ j(not_zero, &sliced_string, Label::kNear); |
| // Cons string. Check whether it is flat, then fetch first part. |
| // Flat cons strings have an empty second part. |
| __ CompareRoot(FieldOperand(rax, ConsString::kSecondOffset), |
| Heap::kEmptyStringRootIndex); |
| __ j(not_equal, &runtime); |
| __ movq(rdi, FieldOperand(rax, ConsString::kFirstOffset)); |
| // Update instance type. |
| __ movq(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
| __ movzxbl(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); |
| __ jmp(&underlying_unpacked, Label::kNear); |
| |
| __ bind(&sliced_string); |
| // Sliced string. Fetch parent and correct start index by offset. |
| __ addq(rdx, FieldOperand(rax, SlicedString::kOffsetOffset)); |
| __ movq(rdi, FieldOperand(rax, SlicedString::kParentOffset)); |
| // Update instance type. |
| __ movq(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
| __ movzxbl(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); |
| __ jmp(&underlying_unpacked, Label::kNear); |
| |
| __ bind(&seq_or_external_string); |
| // Sequential or external string. Just move string to the correct register. |
| __ movq(rdi, rax); |
| |
| __ bind(&underlying_unpacked); |
| |
| if (FLAG_string_slices) { |
| Label copy_routine; |
| // rdi: underlying subject string |
| // rbx: instance type of underlying subject string |
| // rdx: adjusted start index (smi) |
| // rcx: length |
| // If coming from the make_two_character_string path, the string |
| // is too short to be sliced anyways. |
| __ cmpq(rcx, Immediate(SlicedString::kMinLength)); |
| // Short slice. Copy instead of slicing. |
| __ j(less, ©_routine); |
| // Allocate new sliced string. At this point we do not reload the instance |
| // type including the string encoding because we simply rely on the info |
| // provided by the original string. It does not matter if the original |
| // string's encoding is wrong because we always have to recheck encoding of |
| // the newly created string's parent anyways due to externalized strings. |
| Label two_byte_slice, set_slice_header; |
| STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0); |
| STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| __ testb(rbx, Immediate(kStringEncodingMask)); |
| __ j(zero, &two_byte_slice, Label::kNear); |
| __ AllocateAsciiSlicedString(rax, rbx, r14, &runtime); |
| __ jmp(&set_slice_header, Label::kNear); |
| __ bind(&two_byte_slice); |
| __ AllocateTwoByteSlicedString(rax, rbx, r14, &runtime); |
| __ bind(&set_slice_header); |
| __ Integer32ToSmi(rcx, rcx); |
| __ movq(FieldOperand(rax, SlicedString::kLengthOffset), rcx); |
| __ movq(FieldOperand(rax, SlicedString::kHashFieldOffset), |
| Immediate(String::kEmptyHashField)); |
| __ movq(FieldOperand(rax, SlicedString::kParentOffset), rdi); |
| __ movq(FieldOperand(rax, SlicedString::kOffsetOffset), rdx); |
| __ IncrementCounter(counters->sub_string_native(), 1); |
| __ ret(kArgumentsSize); |
| |
| __ bind(©_routine); |
| } |
| |
| // rdi: underlying subject string |
| // rbx: instance type of underlying subject string |
| // rdx: adjusted start index (smi) |
| // rcx: length |
| // The subject string can only be external or sequential string of either |
| // encoding at this point. |
| Label two_byte_sequential, sequential_string; |
| STATIC_ASSERT(kExternalStringTag != 0); |
| STATIC_ASSERT(kSeqStringTag == 0); |
| __ testb(rbx, Immediate(kExternalStringTag)); |
| __ j(zero, &sequential_string); |
| |
| // Handle external string. |
| // Rule out short external strings. |
| STATIC_CHECK(kShortExternalStringTag != 0); |
| __ testb(rbx, Immediate(kShortExternalStringMask)); |
| __ j(not_zero, &runtime); |
| __ movq(rdi, FieldOperand(rdi, ExternalString::kResourceDataOffset)); |
| // Move the pointer so that offset-wise, it looks like a sequential string. |
| STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize); |
| __ subq(rdi, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| |
| __ bind(&sequential_string); |
| STATIC_ASSERT((kAsciiStringTag & kStringEncodingMask) != 0); |
| __ testb(rbx, Immediate(kStringEncodingMask)); |
| __ j(zero, &two_byte_sequential); |
| |
| // Allocate the result. |
| __ AllocateAsciiString(rax, rcx, r11, r14, r15, &runtime); |
| |
| // rax: result string |
| // rcx: result string length |
| __ movq(r14, rsi); // esi used by following code. |
| { // Locate character of sub string start. |
| SmiIndex smi_as_index = masm->SmiToIndex(rdx, rdx, times_1); |
| __ lea(rsi, Operand(rdi, smi_as_index.reg, smi_as_index.scale, |
| SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| } |
| // Locate first character of result. |
| __ lea(rdi, FieldOperand(rax, SeqAsciiString::kHeaderSize)); |
| |
| // rax: result string |
| // rcx: result length |
| // rdi: first character of result |
| // rsi: character of sub string start |
| // r14: original value of rsi |
| StringHelper::GenerateCopyCharactersREP(masm, rdi, rsi, rcx, true); |
| __ movq(rsi, r14); // Restore rsi. |
| __ IncrementCounter(counters->sub_string_native(), 1); |
| __ ret(kArgumentsSize); |
| |
| __ bind(&two_byte_sequential); |
| // Allocate the result. |
| __ AllocateTwoByteString(rax, rcx, r11, r14, r15, &runtime); |
| |
| // rax: result string |
| // rcx: result string length |
| __ movq(r14, rsi); // esi used by following code. |
| { // Locate character of sub string start. |
| SmiIndex smi_as_index = masm->SmiToIndex(rdx, rdx, times_2); |
| __ lea(rsi, Operand(rdi, smi_as_index.reg, smi_as_index.scale, |
| SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| } |
| // Locate first character of result. |
| __ lea(rdi, FieldOperand(rax, SeqTwoByteString::kHeaderSize)); |
| |
| // rax: result string |
| // rcx: result length |
| // rdi: first character of result |
| // rsi: character of sub string start |
| // r14: original value of rsi |
| StringHelper::GenerateCopyCharactersREP(masm, rdi, rsi, rcx, false); |
| __ movq(rsi, r14); // Restore esi. |
| __ IncrementCounter(counters->sub_string_native(), 1); |
| __ ret(kArgumentsSize); |
| |
| // Just jump to runtime to create the sub string. |
| __ bind(&runtime); |
| __ TailCallRuntime(Runtime::kSubString, 3, 1); |
| } |
| |
| |
| void StringCompareStub::GenerateFlatAsciiStringEquals(MacroAssembler* masm, |
| Register left, |
| Register right, |
| Register scratch1, |
| Register scratch2) { |
| Register length = scratch1; |
| |
| // Compare lengths. |
| Label check_zero_length; |
| __ movq(length, FieldOperand(left, String::kLengthOffset)); |
| __ SmiCompare(length, FieldOperand(right, String::kLengthOffset)); |
| __ j(equal, &check_zero_length, Label::kNear); |
| __ Move(rax, Smi::FromInt(NOT_EQUAL)); |
| __ ret(0); |
| |
| // Check if the length is zero. |
| Label compare_chars; |
| __ bind(&check_zero_length); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ SmiTest(length); |
| __ j(not_zero, &compare_chars, Label::kNear); |
| __ Move(rax, Smi::FromInt(EQUAL)); |
| __ ret(0); |
| |
| // Compare characters. |
| __ bind(&compare_chars); |
| Label strings_not_equal; |
| GenerateAsciiCharsCompareLoop(masm, left, right, length, scratch2, |
| &strings_not_equal, Label::kNear); |
| |
| // Characters are equal. |
| __ Move(rax, Smi::FromInt(EQUAL)); |
| __ ret(0); |
| |
| // Characters are not equal. |
| __ bind(&strings_not_equal); |
| __ Move(rax, Smi::FromInt(NOT_EQUAL)); |
| __ ret(0); |
| } |
| |
| |
| void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| Register left, |
| Register right, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Register scratch4) { |
| // Ensure that you can always subtract a string length from a non-negative |
| // number (e.g. another length). |
| STATIC_ASSERT(String::kMaxLength < 0x7fffffff); |
| |
| // Find minimum length and length difference. |
| __ movq(scratch1, FieldOperand(left, String::kLengthOffset)); |
| __ movq(scratch4, scratch1); |
| __ SmiSub(scratch4, |
| scratch4, |
| FieldOperand(right, String::kLengthOffset)); |
| // Register scratch4 now holds left.length - right.length. |
| const Register length_difference = scratch4; |
| Label left_shorter; |
| __ j(less, &left_shorter, Label::kNear); |
| // The right string isn't longer that the left one. |
| // Get the right string's length by subtracting the (non-negative) difference |
| // from the left string's length. |
| __ SmiSub(scratch1, scratch1, length_difference); |
| __ bind(&left_shorter); |
| // Register scratch1 now holds Min(left.length, right.length). |
| const Register min_length = scratch1; |
| |
| Label compare_lengths; |
| // If min-length is zero, go directly to comparing lengths. |
| __ SmiTest(min_length); |
| __ j(zero, &compare_lengths, Label::kNear); |
| |
| // Compare loop. |
| Label result_not_equal; |
| GenerateAsciiCharsCompareLoop(masm, left, right, min_length, scratch2, |
| &result_not_equal, Label::kNear); |
| |
| // Completed loop without finding different characters. |
| // Compare lengths (precomputed). |
| __ bind(&compare_lengths); |
| __ SmiTest(length_difference); |
| __ j(not_zero, &result_not_equal, Label::kNear); |
| |
| // Result is EQUAL. |
| __ Move(rax, Smi::FromInt(EQUAL)); |
| __ ret(0); |
| |
| Label result_greater; |
| __ bind(&result_not_equal); |
| // Unequal comparison of left to right, either character or length. |
| __ j(greater, &result_greater, Label::kNear); |
| |
| // Result is LESS. |
| __ Move(rax, Smi::FromInt(LESS)); |
| __ ret(0); |
| |
| // Result is GREATER. |
| __ bind(&result_greater); |
| __ Move(rax, Smi::FromInt(GREATER)); |
| __ ret(0); |
| } |
| |
| |
| void StringCompareStub::GenerateAsciiCharsCompareLoop( |
| MacroAssembler* masm, |
| Register left, |
| Register right, |
| Register length, |
| Register scratch, |
| Label* chars_not_equal, |
| Label::Distance near_jump) { |
| // Change index to run from -length to -1 by adding length to string |
| // start. This means that loop ends when index reaches zero, which |
| // doesn't need an additional compare. |
| __ SmiToInteger32(length, length); |
| __ lea(left, |
| FieldOperand(left, length, times_1, SeqAsciiString::kHeaderSize)); |
| __ lea(right, |
| FieldOperand(right, length, times_1, SeqAsciiString::kHeaderSize)); |
| __ neg(length); |
| Register index = length; // index = -length; |
| |
| // Compare loop. |
| Label loop; |
| __ bind(&loop); |
| __ movb(scratch, Operand(left, index, times_1, 0)); |
| __ cmpb(scratch, Operand(right, index, times_1, 0)); |
| __ j(not_equal, chars_not_equal, near_jump); |
| __ incq(index); |
| __ j(not_zero, &loop); |
| } |
| |
| |
| void StringCompareStub::Generate(MacroAssembler* masm) { |
| Label runtime; |
| |
| // Stack frame on entry. |
| // rsp[0]: return address |
| // rsp[8]: right string |
| // rsp[16]: left string |
| |
| __ movq(rdx, Operand(rsp, 2 * kPointerSize)); // left |
| __ movq(rax, Operand(rsp, 1 * kPointerSize)); // right |
| |
| // Check for identity. |
| Label not_same; |
| __ cmpq(rdx, rax); |
| __ j(not_equal, ¬_same, Label::kNear); |
| __ Move(rax, Smi::FromInt(EQUAL)); |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->string_compare_native(), 1); |
| __ ret(2 * kPointerSize); |
| |
| __ bind(¬_same); |
| |
| // Check that both are sequential ASCII strings. |
| __ JumpIfNotBothSequentialAsciiStrings(rdx, rax, rcx, rbx, &runtime); |
| |
| // Inline comparison of ASCII strings. |
| __ IncrementCounter(counters->string_compare_native(), 1); |
| // Drop arguments from the stack |
| __ pop(rcx); |
| __ addq(rsp, Immediate(2 * kPointerSize)); |
| __ push(rcx); |
| GenerateCompareFlatAsciiStrings(masm, rdx, rax, rcx, rbx, rdi, r8); |
| |
| // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| // tagged as a small integer. |
| __ bind(&runtime); |
| __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
| } |
| |
| |
| void ICCompareStub::GenerateSmis(MacroAssembler* masm) { |
| ASSERT(state_ == CompareIC::SMIS); |
| Label miss; |
| __ JumpIfNotBothSmi(rdx, rax, &miss, Label::kNear); |
| |
| if (GetCondition() == equal) { |
| // For equality we do not care about the sign of the result. |
| __ subq(rax, rdx); |
| } else { |
| Label done; |
| __ subq(rdx, rax); |
| __ j(no_overflow, &done, Label::kNear); |
| // Correct sign of result in case of overflow. |
| __ SmiNot(rdx, rdx); |
| __ bind(&done); |
| __ movq(rax, rdx); |
| } |
| __ ret(0); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) { |
| ASSERT(state_ == CompareIC::HEAP_NUMBERS); |
| |
| Label generic_stub; |
| Label unordered, maybe_undefined1, maybe_undefined2; |
| Label miss; |
| Condition either_smi = masm->CheckEitherSmi(rax, rdx); |
| __ j(either_smi, &generic_stub, Label::kNear); |
| |
| __ CmpObjectType(rax, HEAP_NUMBER_TYPE, rcx); |
| __ j(not_equal, &maybe_undefined1, Label::kNear); |
| __ CmpObjectType(rdx, HEAP_NUMBER_TYPE, rcx); |
| __ j(not_equal, &maybe_undefined2, Label::kNear); |
| |
| // Load left and right operand |
| __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| |
| // Compare operands |
| __ ucomisd(xmm0, xmm1); |
| |
| // Don't base result on EFLAGS when a NaN is involved. |
| __ j(parity_even, &unordered, Label::kNear); |
| |
| // Return a result of -1, 0, or 1, based on EFLAGS. |
| // Performing mov, because xor would destroy the flag register. |
| __ movl(rax, Immediate(0)); |
| __ movl(rcx, Immediate(0)); |
| __ setcc(above, rax); // Add one to zero if carry clear and not equal. |
| __ sbbq(rax, rcx); // Subtract one if below (aka. carry set). |
| __ ret(0); |
| |
| __ bind(&unordered); |
| CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS); |
| __ bind(&generic_stub); |
| __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET); |
| |
| __ bind(&maybe_undefined1); |
| if (Token::IsOrderedRelationalCompareOp(op_)) { |
| __ Cmp(rax, masm->isolate()->factory()->undefined_value()); |
| __ j(not_equal, &miss); |
| __ CmpObjectType(rdx, HEAP_NUMBER_TYPE, rcx); |
| __ j(not_equal, &maybe_undefined2, Label::kNear); |
| __ jmp(&unordered); |
| } |
| |
| __ bind(&maybe_undefined2); |
| if (Token::IsOrderedRelationalCompareOp(op_)) { |
| __ Cmp(rdx, masm->isolate()->factory()->undefined_value()); |
| __ j(equal, &unordered); |
| } |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void ICCompareStub::GenerateSymbols(MacroAssembler* masm) { |
| ASSERT(state_ == CompareIC::SYMBOLS); |
| ASSERT(GetCondition() == equal); |
| |
| // Registers containing left and right operands respectively. |
| Register left = rdx; |
| Register right = rax; |
| Register tmp1 = rcx; |
| Register tmp2 = rbx; |
| |
| // Check that both operands are heap objects. |
| Label miss; |
| Condition cond = masm->CheckEitherSmi(left, right, tmp1); |
| __ j(cond, &miss, Label::kNear); |
| |
| // Check that both operands are symbols. |
| __ movq(tmp1, FieldOperand(left, HeapObject::kMapOffset)); |
| __ movq(tmp2, FieldOperand(right, HeapObject::kMapOffset)); |
| __ movzxbq(tmp1, FieldOperand(tmp1, Map::kInstanceTypeOffset)); |
| __ movzxbq(tmp2, FieldOperand(tmp2, Map::kInstanceTypeOffset)); |
| STATIC_ASSERT(kSymbolTag != 0); |
| __ and_(tmp1, tmp2); |
| __ testb(tmp1, Immediate(kIsSymbolMask)); |
| __ j(zero, &miss, Label::kNear); |
| |
| // Symbols are compared by identity. |
| Label done; |
| __ cmpq(left, right); |
| // Make sure rax is non-zero. At this point input operands are |
| // guaranteed to be non-zero. |
| ASSERT(right.is(rax)); |
| __ j(not_equal, &done, Label::kNear); |
| STATIC_ASSERT(EQUAL == 0); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ Move(rax, Smi::FromInt(EQUAL)); |
| __ bind(&done); |
| __ ret(0); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void ICCompareStub::GenerateStrings(MacroAssembler* masm) { |
| ASSERT(state_ == CompareIC::STRINGS); |
| Label miss; |
| |
| bool equality = Token::IsEqualityOp(op_); |
| |
| // Registers containing left and right operands respectively. |
| Register left = rdx; |
| Register right = rax; |
| Register tmp1 = rcx; |
| Register tmp2 = rbx; |
| Register tmp3 = rdi; |
| |
| // Check that both operands are heap objects. |
| Condition cond = masm->CheckEitherSmi(left, right, tmp1); |
| __ j(cond, &miss); |
| |
| // Check that both operands are strings. This leaves the instance |
| // types loaded in tmp1 and tmp2. |
| __ movq(tmp1, FieldOperand(left, HeapObject::kMapOffset)); |
| __ movq(tmp2, FieldOperand(right, HeapObject::kMapOffset)); |
| __ movzxbq(tmp1, FieldOperand(tmp1, Map::kInstanceTypeOffset)); |
| __ movzxbq(tmp2, FieldOperand(tmp2, Map::kInstanceTypeOffset)); |
| __ movq(tmp3, tmp1); |
| STATIC_ASSERT(kNotStringTag != 0); |
| __ or_(tmp3, tmp2); |
| __ testb(tmp3, Immediate(kIsNotStringMask)); |
| __ j(not_zero, &miss); |
| |
| // Fast check for identical strings. |
| Label not_same; |
| __ cmpq(left, right); |
| __ j(not_equal, ¬_same, Label::kNear); |
| STATIC_ASSERT(EQUAL == 0); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ Move(rax, Smi::FromInt(EQUAL)); |
| __ ret(0); |
| |
| // Handle not identical strings. |
| __ bind(¬_same); |
| |
| // Check that both strings are symbols. If they are, we're done |
| // because we already know they are not identical. |
| if (equality) { |
| Label do_compare; |
| STATIC_ASSERT(kSymbolTag != 0); |
| __ and_(tmp1, tmp2); |
| __ testb(tmp1, Immediate(kIsSymbolMask)); |
| __ j(zero, &do_compare, Label::kNear); |
| // Make sure rax is non-zero. At this point input operands are |
| // guaranteed to be non-zero. |
| ASSERT(right.is(rax)); |
| __ ret(0); |
| __ bind(&do_compare); |
| } |
| |
| // Check that both strings are sequential ASCII. |
| Label runtime; |
| __ JumpIfNotBothSequentialAsciiStrings(left, right, tmp1, tmp2, &runtime); |
| |
| // Compare flat ASCII strings. Returns when done. |
| if (equality) { |
| StringCompareStub::GenerateFlatAsciiStringEquals( |
| masm, left, right, tmp1, tmp2); |
| } else { |
| StringCompareStub::GenerateCompareFlatAsciiStrings( |
| masm, left, right, tmp1, tmp2, tmp3, kScratchRegister); |
| } |
| |
| // Handle more complex cases in runtime. |
| __ bind(&runtime); |
| __ pop(tmp1); // Return address. |
| __ push(left); |
| __ push(right); |
| __ push(tmp1); |
| if (equality) { |
| __ TailCallRuntime(Runtime::kStringEquals, 2, 1); |
| } else { |
| __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
| } |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void ICCompareStub::GenerateObjects(MacroAssembler* masm) { |
| ASSERT(state_ == CompareIC::OBJECTS); |
| Label miss; |
| Condition either_smi = masm->CheckEitherSmi(rdx, rax); |
| __ j(either_smi, &miss, Label::kNear); |
| |
| __ CmpObjectType(rax, JS_OBJECT_TYPE, rcx); |
| __ j(not_equal, &miss, Label::kNear); |
| __ CmpObjectType(rdx, JS_OBJECT_TYPE, rcx); |
| __ j(not_equal, &miss, Label::kNear); |
| |
| ASSERT(GetCondition() == equal); |
| __ subq(rax, rdx); |
| __ ret(0); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void ICCompareStub::GenerateKnownObjects(MacroAssembler* masm) { |
| Label miss; |
| Condition either_smi = masm->CheckEitherSmi(rdx, rax); |
| __ j(either_smi, &miss, Label::kNear); |
| |
| __ movq(rcx, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset)); |
| __ Cmp(rcx, known_map_); |
| __ j(not_equal, &miss, Label::kNear); |
| __ Cmp(rbx, known_map_); |
| __ j(not_equal, &miss, Label::kNear); |
| |
| __ subq(rax, rdx); |
| __ ret(0); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void ICCompareStub::GenerateMiss(MacroAssembler* masm) { |
| { |
| // Call the runtime system in a fresh internal frame. |
| ExternalReference miss = |
| ExternalReference(IC_Utility(IC::kCompareIC_Miss), masm->isolate()); |
| |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ push(rdx); |
| __ push(rax); |
| __ push(rdx); |
| __ push(rax); |
| __ Push(Smi::FromInt(op_)); |
| __ CallExternalReference(miss, 3); |
| |
| // Compute the entry point of the rewritten stub. |
| __ lea(rdi, FieldOperand(rax, Code::kHeaderSize)); |
| __ pop(rax); |
| __ pop(rdx); |
| } |
| |
| // Do a tail call to the rewritten stub. |
| __ jmp(rdi); |
| } |
| |
| |
| void StringDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm, |
| Label* miss, |
| Label* done, |
| Register properties, |
| Handle<String> name, |
| Register r0) { |
| // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| // not equal to the name and kProbes-th slot is not used (its name is the |
| // undefined value), it guarantees the hash table doesn't contain the |
| // property. It's true even if some slots represent deleted properties |
| // (their names are the hole value). |
| for (int i = 0; i < kInlinedProbes; i++) { |
| // r0 points to properties hash. |
| // Compute the masked index: (hash + i + i * i) & mask. |
| Register index = r0; |
| // Capacity is smi 2^n. |
| __ SmiToInteger32(index, FieldOperand(properties, kCapacityOffset)); |
| __ decl(index); |
| __ and_(index, |
| Immediate(name->Hash() + StringDictionary::GetProbeOffset(i))); |
| |
| // Scale the index by multiplying by the entry size. |
| ASSERT(StringDictionary::kEntrySize == 3); |
| __ lea(index, Operand(index, index, times_2, 0)); // index *= 3. |
| |
| Register entity_name = r0; |
| // Having undefined at this place means the name is not contained. |
| ASSERT_EQ(kSmiTagSize, 1); |
| __ movq(entity_name, Operand(properties, |
| index, |
| times_pointer_size, |
| kElementsStartOffset - kHeapObjectTag)); |
| __ Cmp(entity_name, masm->isolate()->factory()->undefined_value()); |
| __ j(equal, done); |
| |
| // Stop if found the property. |
| __ Cmp(entity_name, Handle<String>(name)); |
| __ j(equal, miss); |
| |
| Label the_hole; |
| // Check for the hole and skip. |
| __ CompareRoot(entity_name, Heap::kTheHoleValueRootIndex); |
| __ j(equal, &the_hole, Label::kNear); |
| |
| // Check if the entry name is not a symbol. |
| __ movq(entity_name, FieldOperand(entity_name, HeapObject::kMapOffset)); |
| __ testb(FieldOperand(entity_name, Map::kInstanceTypeOffset), |
| Immediate(kIsSymbolMask)); |
| __ j(zero, miss); |
| |
| __ bind(&the_hole); |
| } |
| |
| StringDictionaryLookupStub stub(properties, |
| r0, |
| r0, |
| StringDictionaryLookupStub::NEGATIVE_LOOKUP); |
| __ Push(Handle<Object>(name)); |
| __ push(Immediate(name->Hash())); |
| __ CallStub(&stub); |
| __ testq(r0, r0); |
| __ j(not_zero, miss); |
| __ jmp(done); |
| } |
| |
| |
| // Probe the string dictionary in the |elements| register. Jump to the |
| // |done| label if a property with the given name is found leaving the |
| // index into the dictionary in |r1|. Jump to the |miss| label |
| // otherwise. |
| void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, |
| Label* miss, |
| Label* done, |
| Register elements, |
| Register name, |
| Register r0, |
| Register r1) { |
| ASSERT(!elements.is(r0)); |
| ASSERT(!elements.is(r1)); |
| ASSERT(!name.is(r0)); |
| ASSERT(!name.is(r1)); |
| |
| // Assert that name contains a string. |
| if (FLAG_debug_code) __ AbortIfNotString(name); |
| |
| __ SmiToInteger32(r0, FieldOperand(elements, kCapacityOffset)); |
| __ decl(r0); |
| |
| for (int i = 0; i < kInlinedProbes; i++) { |
| // Compute the masked index: (hash + i + i * i) & mask. |
| __ movl(r1, FieldOperand(name, String::kHashFieldOffset)); |
| __ shrl(r1, Immediate(String::kHashShift)); |
| if (i > 0) { |
| __ addl(r1, Immediate(StringDictionary::GetProbeOffset(i))); |
| } |
| __ and_(r1, r0); |
| |
| // Scale the index by multiplying by the entry size. |
| ASSERT(StringDictionary::kEntrySize == 3); |
| __ lea(r1, Operand(r1, r1, times_2, 0)); // r1 = r1 * 3 |
| |
| // Check if the key is identical to the name. |
| __ cmpq(name, Operand(elements, r1, times_pointer_size, |
| kElementsStartOffset - kHeapObjectTag)); |
| __ j(equal, done); |
| } |
| |
| StringDictionaryLookupStub stub(elements, |
| r0, |
| r1, |
| POSITIVE_LOOKUP); |
| __ push(name); |
| __ movl(r0, FieldOperand(name, String::kHashFieldOffset)); |
| __ shrl(r0, Immediate(String::kHashShift)); |
| __ push(r0); |
| __ CallStub(&stub); |
| |
| __ testq(r0, r0); |
| __ j(zero, miss); |
| __ jmp(done); |
| } |
| |
| |
| void StringDictionaryLookupStub::Generate(MacroAssembler* masm) { |
| // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| // we cannot call anything that could cause a GC from this stub. |
| // Stack frame on entry: |
| // esp[0 * kPointerSize]: return address. |
| // esp[1 * kPointerSize]: key's hash. |
| // esp[2 * kPointerSize]: key. |
| // Registers: |
| // dictionary_: StringDictionary to probe. |
| // result_: used as scratch. |
| // index_: will hold an index of entry if lookup is successful. |
| // might alias with result_. |
| // Returns: |
| // result_ is zero if lookup failed, non zero otherwise. |
| |
| Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| |
| Register scratch = result_; |
| |
| __ SmiToInteger32(scratch, FieldOperand(dictionary_, kCapacityOffset)); |
| __ decl(scratch); |
| __ push(scratch); |
| |
| // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| // not equal to the name and kProbes-th slot is not used (its name is the |
| // undefined value), it guarantees the hash table doesn't contain the |
| // property. It's true even if some slots represent deleted properties |
| // (their names are the null value). |
| for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| // Compute the masked index: (hash + i + i * i) & mask. |
| __ movq(scratch, Operand(rsp, 2 * kPointerSize)); |
| if (i > 0) { |
| __ addl(scratch, Immediate(StringDictionary::GetProbeOffset(i))); |
| } |
| __ and_(scratch, Operand(rsp, 0)); |
| |
| // Scale the index by multiplying by the entry size. |
| ASSERT(StringDictionary::kEntrySize == 3); |
| __ lea(index_, Operand(scratch, scratch, times_2, 0)); // index *= 3. |
| |
| // Having undefined at this place means the name is not contained. |
| __ movq(scratch, Operand(dictionary_, |
| index_, |
| times_pointer_size, |
| kElementsStartOffset - kHeapObjectTag)); |
| |
| __ Cmp(scratch, masm->isolate()->factory()->undefined_value()); |
| __ j(equal, ¬_in_dictionary); |
| |
| // Stop if found the property. |
| __ cmpq(scratch, Operand(rsp, 3 * kPointerSize)); |
| __ j(equal, &in_dictionary); |
| |
| if (i != kTotalProbes - 1 && mode_ == NEGATIVE_LOOKUP) { |
| // If we hit a non symbol key during negative lookup |
| // we have to bailout as this key might be equal to the |
| // key we are looking for. |
| |
| // Check if the entry name is not a symbol. |
| __ movq(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); |
| __ testb(FieldOperand(scratch, Map::kInstanceTypeOffset), |
| Immediate(kIsSymbolMask)); |
| __ j(zero, &maybe_in_dictionary); |
| } |
| } |
| |
| __ bind(&maybe_in_dictionary); |
| // If we are doing negative lookup then probing failure should be |
| // treated as a lookup success. For positive lookup probing failure |
| // should be treated as lookup failure. |
| if (mode_ == POSITIVE_LOOKUP) { |
| __ movq(scratch, Immediate(0)); |
| __ Drop(1); |
| __ ret(2 * kPointerSize); |
| } |
| |
| __ bind(&in_dictionary); |
| __ movq(scratch, Immediate(1)); |
| __ Drop(1); |
| __ ret(2 * kPointerSize); |
| |
| __ bind(¬_in_dictionary); |
| __ movq(scratch, Immediate(0)); |
| __ Drop(1); |
| __ ret(2 * kPointerSize); |
| } |
| |
| |
| struct AheadOfTimeWriteBarrierStubList { |
| Register object, value, address; |
| RememberedSetAction action; |
| }; |
| |
| |
| #define REG(Name) { kRegister_ ## Name ## _Code } |
| |
| struct AheadOfTimeWriteBarrierStubList kAheadOfTime[] = { |
| // Used in RegExpExecStub. |
| { REG(rbx), REG(rax), REG(rdi), EMIT_REMEMBERED_SET }, |
| // Used in CompileArrayPushCall. |
| { REG(rbx), REG(rcx), REG(rdx), EMIT_REMEMBERED_SET }, |
| // Used in CompileStoreGlobal. |
| { REG(rbx), REG(rcx), REG(rdx), OMIT_REMEMBERED_SET }, |
| // Used in StoreStubCompiler::CompileStoreField and |
| // KeyedStoreStubCompiler::CompileStoreField via GenerateStoreField. |
| { REG(rdx), REG(rcx), REG(rbx), EMIT_REMEMBERED_SET }, |
| // GenerateStoreField calls the stub with two different permutations of |
| // registers. This is the second. |
| { REG(rbx), REG(rcx), REG(rdx), EMIT_REMEMBERED_SET }, |
| // StoreIC::GenerateNormal via GenerateDictionaryStore. |
| { REG(rbx), REG(r8), REG(r9), EMIT_REMEMBERED_SET }, |
| // KeyedStoreIC::GenerateGeneric. |
| { REG(rbx), REG(rdx), REG(rcx), EMIT_REMEMBERED_SET}, |
| // KeyedStoreStubCompiler::GenerateStoreFastElement. |
| { REG(rdi), REG(rbx), REG(rcx), EMIT_REMEMBERED_SET}, |
| { REG(rdx), REG(rdi), REG(rbx), EMIT_REMEMBERED_SET}, |
| // ElementsTransitionGenerator::GenerateSmiOnlyToObject |
| // and ElementsTransitionGenerator::GenerateSmiOnlyToObject |
| // and ElementsTransitionGenerator::GenerateDoubleToObject |
| { REG(rdx), REG(rbx), REG(rdi), EMIT_REMEMBERED_SET}, |
| { REG(rdx), REG(rbx), REG(rdi), OMIT_REMEMBERED_SET}, |
| // ElementsTransitionGenerator::GenerateSmiOnlyToDouble |
| // and ElementsTransitionGenerator::GenerateDoubleToObject |
| { REG(rdx), REG(r11), REG(r15), EMIT_REMEMBERED_SET}, |
| // ElementsTransitionGenerator::GenerateDoubleToObject |
| { REG(r11), REG(rax), REG(r15), EMIT_REMEMBERED_SET}, |
| // StoreArrayLiteralElementStub::Generate |
| { REG(rbx), REG(rax), REG(rcx), EMIT_REMEMBERED_SET}, |
| // Null termination. |
| { REG(no_reg), REG(no_reg), REG(no_reg), EMIT_REMEMBERED_SET} |
| }; |
| |
| #undef REG |
| |
| bool RecordWriteStub::IsPregenerated() { |
| for (AheadOfTimeWriteBarrierStubList* entry = kAheadOfTime; |
| !entry->object.is(no_reg); |
| entry++) { |
| if (object_.is(entry->object) && |
| value_.is(entry->value) && |
| address_.is(entry->address) && |
| remembered_set_action_ == entry->action && |
| save_fp_regs_mode_ == kDontSaveFPRegs) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime() { |
| StoreBufferOverflowStub stub1(kDontSaveFPRegs); |
| stub1.GetCode()->set_is_pregenerated(true); |
| StoreBufferOverflowStub stub2(kSaveFPRegs); |
| stub2.GetCode()->set_is_pregenerated(true); |
| } |
| |
| |
| void RecordWriteStub::GenerateFixedRegStubsAheadOfTime() { |
| for (AheadOfTimeWriteBarrierStubList* entry = kAheadOfTime; |
| !entry->object.is(no_reg); |
| entry++) { |
| RecordWriteStub stub(entry->object, |
| entry->value, |
| entry->address, |
| entry->action, |
| kDontSaveFPRegs); |
| stub.GetCode()->set_is_pregenerated(true); |
| } |
| } |
| |
| |
| // Takes the input in 3 registers: address_ value_ and object_. A pointer to |
| // the value has just been written into the object, now this stub makes sure |
| // we keep the GC informed. The word in the object where the value has been |
| // written is in the address register. |
| void RecordWriteStub::Generate(MacroAssembler* masm) { |
| Label skip_to_incremental_noncompacting; |
| Label skip_to_incremental_compacting; |
| |
| // The first two instructions are generated with labels so as to get the |
| // offset fixed up correctly by the bind(Label*) call. We patch it back and |
| // forth between a compare instructions (a nop in this position) and the |
| // real branch when we start and stop incremental heap marking. |
| // See RecordWriteStub::Patch for details. |
| __ jmp(&skip_to_incremental_noncompacting, Label::kNear); |
| __ jmp(&skip_to_incremental_compacting, Label::kFar); |
| |
| if (remembered_set_action_ == EMIT_REMEMBERED_SET) { |
| __ RememberedSetHelper(object_, |
| address_, |
| value_, |
| save_fp_regs_mode_, |
| MacroAssembler::kReturnAtEnd); |
| } else { |
| __ ret(0); |
| } |
| |
| __ bind(&skip_to_incremental_noncompacting); |
| GenerateIncremental(masm, INCREMENTAL); |
| |
| __ bind(&skip_to_incremental_compacting); |
| GenerateIncremental(masm, INCREMENTAL_COMPACTION); |
| |
| // Initial mode of the stub is expected to be STORE_BUFFER_ONLY. |
| // Will be checked in IncrementalMarking::ActivateGeneratedStub. |
| masm->set_byte_at(0, kTwoByteNopInstruction); |
| masm->set_byte_at(2, kFiveByteNopInstruction); |
| } |
| |
| |
| void RecordWriteStub::GenerateIncremental(MacroAssembler* masm, Mode mode) { |
| regs_.Save(masm); |
| |
| if (remembered_set_action_ == EMIT_REMEMBERED_SET) { |
| Label dont_need_remembered_set; |
| |
| __ movq(regs_.scratch0(), Operand(regs_.address(), 0)); |
| __ JumpIfNotInNewSpace(regs_.scratch0(), |
| regs_.scratch0(), |
| &dont_need_remembered_set); |
| |
| __ CheckPageFlag(regs_.object(), |
| regs_.scratch0(), |
| 1 << MemoryChunk::SCAN_ON_SCAVENGE, |
| not_zero, |
| &dont_need_remembered_set); |
| |
| // First notify the incremental marker if necessary, then update the |
| // remembered set. |
| CheckNeedsToInformIncrementalMarker( |
| masm, kUpdateRememberedSetOnNoNeedToInformIncrementalMarker, mode); |
| InformIncrementalMarker(masm, mode); |
| regs_.Restore(masm); |
| __ RememberedSetHelper(object_, |
| address_, |
| value_, |
| save_fp_regs_mode_, |
| MacroAssembler::kReturnAtEnd); |
| |
| __ bind(&dont_need_remembered_set); |
| } |
| |
| CheckNeedsToInformIncrementalMarker( |
| masm, kReturnOnNoNeedToInformIncrementalMarker, mode); |
| InformIncrementalMarker(masm, mode); |
| regs_.Restore(masm); |
| __ ret(0); |
| } |
| |
| |
| void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm, Mode mode) { |
| regs_.SaveCallerSaveRegisters(masm, save_fp_regs_mode_); |
| #ifdef _WIN64 |
| Register arg3 = r8; |
| Register arg2 = rdx; |
| Register arg1 = rcx; |
| #else |
| Register arg3 = rdx; |
| Register arg2 = rsi; |
| Register arg1 = rdi; |
| #endif |
| Register address = |
| arg1.is(regs_.address()) ? kScratchRegister : regs_.address(); |
| ASSERT(!address.is(regs_.object())); |
| ASSERT(!address.is(arg1)); |
| __ Move(address, regs_.address()); |
| __ Move(arg1, regs_.object()); |
| if (mode == INCREMENTAL_COMPACTION) { |
| // TODO(gc) Can we just set address arg2 in the beginning? |
| __ Move(arg2, address); |
| } else { |
| ASSERT(mode == INCREMENTAL); |
| __ movq(arg2, Operand(address, 0)); |
| } |
| __ LoadAddress(arg3, ExternalReference::isolate_address()); |
| int argument_count = 3; |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ PrepareCallCFunction(argument_count); |
| if (mode == INCREMENTAL_COMPACTION) { |
| __ CallCFunction( |
| ExternalReference::incremental_evacuation_record_write_function( |
| masm->isolate()), |
| argument_count); |
| } else { |
| ASSERT(mode == INCREMENTAL); |
| __ CallCFunction( |
| ExternalReference::incremental_marking_record_write_function( |
| masm->isolate()), |
| argument_count); |
| } |
| regs_.RestoreCallerSaveRegisters(masm, save_fp_regs_mode_); |
| } |
| |
| |
| void RecordWriteStub::CheckNeedsToInformIncrementalMarker( |
| MacroAssembler* masm, |
| OnNoNeedToInformIncrementalMarker on_no_need, |
| Mode mode) { |
| Label on_black; |
| Label need_incremental; |
| Label need_incremental_pop_object; |
| |
| // Let's look at the color of the object: If it is not black we don't have |
| // to inform the incremental marker. |
| __ JumpIfBlack(regs_.object(), |
| regs_.scratch0(), |
| regs_.scratch1(), |
| &on_black, |
| Label::kNear); |
| |
| regs_.Restore(masm); |
| if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| __ RememberedSetHelper(object_, |
| address_, |
| value_, |
| save_fp_regs_mode_, |
| MacroAssembler::kReturnAtEnd); |
| } else { |
| __ ret(0); |
| } |
| |
| __ bind(&on_black); |
| |
| // Get the value from the slot. |
| __ movq(regs_.scratch0(), Operand(regs_.address(), 0)); |
| |
| if (mode == INCREMENTAL_COMPACTION) { |
| Label ensure_not_white; |
| |
| __ CheckPageFlag(regs_.scratch0(), // Contains value. |
| regs_.scratch1(), // Scratch. |
| MemoryChunk::kEvacuationCandidateMask, |
| zero, |
| &ensure_not_white, |
| Label::kNear); |
| |
| __ CheckPageFlag(regs_.object(), |
| regs_.scratch1(), // Scratch. |
| MemoryChunk::kSkipEvacuationSlotsRecordingMask, |
| zero, |
| &need_incremental); |
| |
| __ bind(&ensure_not_white); |
| } |
| |
| // We need an extra register for this, so we push the object register |
| // temporarily. |
| __ push(regs_.object()); |
| __ EnsureNotWhite(regs_.scratch0(), // The value. |
| regs_.scratch1(), // Scratch. |
| regs_.object(), // Scratch. |
| &need_incremental_pop_object, |
| Label::kNear); |
| __ pop(regs_.object()); |
| |
| regs_.Restore(masm); |
| if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| __ RememberedSetHelper(object_, |
| address_, |
| value_, |
| save_fp_regs_mode_, |
| MacroAssembler::kReturnAtEnd); |
| } else { |
| __ ret(0); |
| } |
| |
| __ bind(&need_incremental_pop_object); |
| __ pop(regs_.object()); |
| |
| __ bind(&need_incremental); |
| |
| // Fall through when we need to inform the incremental marker. |
| } |
| |
| |
| void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- rax : element value to store |
| // -- rbx : array literal |
| // -- rdi : map of array literal |
| // -- rcx : element index as smi |
| // -- rdx : array literal index in function |
| // -- rsp[0] : return address |
| // ----------------------------------- |
| |
| Label element_done; |
| Label double_elements; |
| Label smi_element; |
| Label slow_elements; |
| Label fast_elements; |
| |
| __ CheckFastElements(rdi, &double_elements); |
| |
| // FAST_SMI_ONLY_ELEMENTS or FAST_ELEMENTS |
| __ JumpIfSmi(rax, &smi_element); |
| __ CheckFastSmiOnlyElements(rdi, &fast_elements); |
| |
| // Store into the array literal requires a elements transition. Call into |
| // the runtime. |
| |
| __ bind(&slow_elements); |
| __ pop(rdi); // Pop return address and remember to put back later for tail |
| // call. |
| __ push(rbx); |
| __ push(rcx); |
| __ push(rax); |
| __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ push(FieldOperand(rbx, JSFunction::kLiteralsOffset)); |
| __ push(rdx); |
| __ push(rdi); // Return return address so that tail call returns to right |
| // place. |
| __ TailCallRuntime(Runtime::kStoreArrayLiteralElement, 5, 1); |
| |
| // Array literal has ElementsKind of FAST_ELEMENTS and value is an object. |
| __ bind(&fast_elements); |
| __ SmiToInteger32(kScratchRegister, rcx); |
| __ movq(rbx, FieldOperand(rbx, JSObject::kElementsOffset)); |
| __ lea(rcx, FieldOperand(rbx, kScratchRegister, times_pointer_size, |
| FixedArrayBase::kHeaderSize)); |
| __ movq(Operand(rcx, 0), rax); |
| // Update the write barrier for the array store. |
| __ RecordWrite(rbx, rcx, rax, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| __ ret(0); |
| |
| // Array literal has ElementsKind of FAST_SMI_ONLY_ELEMENTS or |
| // FAST_ELEMENTS, and value is Smi. |
| __ bind(&smi_element); |
| __ SmiToInteger32(kScratchRegister, rcx); |
| __ movq(rbx, FieldOperand(rbx, JSObject::kElementsOffset)); |
| __ movq(FieldOperand(rbx, kScratchRegister, times_pointer_size, |
| FixedArrayBase::kHeaderSize), rax); |
| __ ret(0); |
| |
| // Array literal has ElementsKind of FAST_DOUBLE_ELEMENTS. |
| __ bind(&double_elements); |
| |
| __ movq(r9, FieldOperand(rbx, JSObject::kElementsOffset)); |
| __ SmiToInteger32(r11, rcx); |
| __ StoreNumberToDoubleElements(rax, |
| r9, |
| r11, |
| xmm0, |
| &slow_elements); |
| __ ret(0); |
| } |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_X64 |