| // Copyright 2006-2009 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" |
| |
| #include "codegen-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void Builtins::Generate_Adaptor(MacroAssembler* masm, |
| CFunctionId id, |
| BuiltinExtraArguments extra_args) { |
| // ----------- S t a t e ------------- |
| // -- eax : number of arguments excluding receiver |
| // -- edi : called function (only guaranteed when |
| // extra_args requires it) |
| // -- esi : context |
| // -- esp[0] : return address |
| // -- esp[4] : last argument |
| // -- ... |
| // -- esp[4 * argc] : first argument (argc == eax) |
| // -- esp[4 * (argc +1)] : receiver |
| // ----------------------------------- |
| |
| // Insert extra arguments. |
| int num_extra_args = 0; |
| if (extra_args == NEEDS_CALLED_FUNCTION) { |
| num_extra_args = 1; |
| Register scratch = ebx; |
| __ pop(scratch); // Save return address. |
| __ push(edi); |
| __ push(scratch); // Restore return address. |
| } else { |
| ASSERT(extra_args == NO_EXTRA_ARGUMENTS); |
| } |
| |
| // JumpToRuntime expects eax to contain the number of arguments |
| // including the receiver and the extra arguments. |
| __ add(Operand(eax), Immediate(num_extra_args + 1)); |
| __ JumpToRuntime(ExternalReference(id)); |
| } |
| |
| |
| void Builtins::Generate_JSConstructCall(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax: number of arguments |
| // -- edi: constructor function |
| // ----------------------------------- |
| |
| Label non_function_call; |
| // Check that function is not a smi. |
| __ test(edi, Immediate(kSmiTagMask)); |
| __ j(zero, &non_function_call); |
| // Check that function is a JSFunction. |
| __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
| __ j(not_equal, &non_function_call); |
| |
| // Jump to the function-specific construct stub. |
| __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| __ mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kConstructStubOffset)); |
| __ lea(ebx, FieldOperand(ebx, Code::kHeaderSize)); |
| __ jmp(Operand(ebx)); |
| |
| // edi: called object |
| // eax: number of arguments |
| __ bind(&non_function_call); |
| // CALL_NON_FUNCTION expects the non-function constructor as receiver |
| // (instead of the original receiver from the call site). The receiver is |
| // stack element argc+1. |
| __ mov(Operand(esp, eax, times_4, kPointerSize), edi); |
| // Set expected number of arguments to zero (not changing eax). |
| __ Set(ebx, Immediate(0)); |
| __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR); |
| __ jmp(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| |
| static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
| bool is_api_function) { |
| // Enter a construct frame. |
| __ EnterConstructFrame(); |
| |
| // Store a smi-tagged arguments count on the stack. |
| __ SmiTag(eax); |
| __ push(eax); |
| |
| // Push the function to invoke on the stack. |
| __ push(edi); |
| |
| // Try to allocate the object without transitioning into C code. If any of the |
| // preconditions is not met, the code bails out to the runtime call. |
| Label rt_call, allocated; |
| if (FLAG_inline_new) { |
| Label undo_allocation; |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| ExternalReference debug_step_in_fp = |
| ExternalReference::debug_step_in_fp_address(); |
| __ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0)); |
| __ j(not_equal, &rt_call); |
| #endif |
| |
| // Verified that the constructor is a JSFunction. |
| // Load the initial map and verify that it is in fact a map. |
| // edi: constructor |
| __ mov(eax, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, &rt_call); |
| // edi: constructor |
| // eax: initial map (if proven valid below) |
| __ CmpObjectType(eax, MAP_TYPE, ebx); |
| __ j(not_equal, &rt_call); |
| |
| // Check that the constructor is not constructing a JSFunction (see comments |
| // in Runtime_NewObject in runtime.cc). In which case the initial map's |
| // instance type would be JS_FUNCTION_TYPE. |
| // edi: constructor |
| // eax: initial map |
| __ CmpInstanceType(eax, JS_FUNCTION_TYPE); |
| __ j(equal, &rt_call); |
| |
| // Now allocate the JSObject on the heap. |
| // edi: constructor |
| // eax: initial map |
| __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset)); |
| __ shl(edi, kPointerSizeLog2); |
| __ AllocateInNewSpace(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS); |
| // Allocated the JSObject, now initialize the fields. |
| // eax: initial map |
| // ebx: JSObject |
| // edi: start of next object |
| __ mov(Operand(ebx, JSObject::kMapOffset), eax); |
| __ mov(ecx, Factory::empty_fixed_array()); |
| __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx); |
| __ mov(Operand(ebx, JSObject::kElementsOffset), ecx); |
| // Set extra fields in the newly allocated object. |
| // eax: initial map |
| // ebx: JSObject |
| // edi: start of next object |
| { Label loop, entry; |
| __ mov(edx, Factory::undefined_value()); |
| __ lea(ecx, Operand(ebx, JSObject::kHeaderSize)); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ mov(Operand(ecx, 0), edx); |
| __ add(Operand(ecx), Immediate(kPointerSize)); |
| __ bind(&entry); |
| __ cmp(ecx, Operand(edi)); |
| __ j(less, &loop); |
| } |
| |
| // Add the object tag to make the JSObject real, so that we can continue and |
| // jump into the continuation code at any time from now on. Any failures |
| // need to undo the allocation, so that the heap is in a consistent state |
| // and verifiable. |
| // eax: initial map |
| // ebx: JSObject |
| // edi: start of next object |
| __ or_(Operand(ebx), Immediate(kHeapObjectTag)); |
| |
| // Check if a non-empty properties array is needed. |
| // Allocate and initialize a FixedArray if it is. |
| // eax: initial map |
| // ebx: JSObject |
| // edi: start of next object |
| // Calculate the total number of properties described by the map. |
| __ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset)); |
| __ movzx_b(ecx, FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset)); |
| __ add(edx, Operand(ecx)); |
| // Calculate unused properties past the end of the in-object properties. |
| __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset)); |
| __ sub(edx, Operand(ecx)); |
| // Done if no extra properties are to be allocated. |
| __ j(zero, &allocated); |
| __ Assert(positive, "Property allocation count failed."); |
| |
| // Scale the number of elements by pointer size and add the header for |
| // FixedArrays to the start of the next object calculation from above. |
| // ebx: JSObject |
| // edi: start of next object (will be start of FixedArray) |
| // edx: number of elements in properties array |
| __ AllocateInNewSpace(FixedArray::kHeaderSize, |
| times_pointer_size, |
| edx, |
| edi, |
| ecx, |
| no_reg, |
| &undo_allocation, |
| RESULT_CONTAINS_TOP); |
| |
| // Initialize the FixedArray. |
| // ebx: JSObject |
| // edi: FixedArray |
| // edx: number of elements |
| // ecx: start of next object |
| __ mov(eax, Factory::fixed_array_map()); |
| __ mov(Operand(edi, JSObject::kMapOffset), eax); // setup the map |
| __ mov(Operand(edi, Array::kLengthOffset), edx); // and length |
| |
| // Initialize the fields to undefined. |
| // ebx: JSObject |
| // edi: FixedArray |
| // ecx: start of next object |
| { Label loop, entry; |
| __ mov(edx, Factory::undefined_value()); |
| __ lea(eax, Operand(edi, FixedArray::kHeaderSize)); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ mov(Operand(eax, 0), edx); |
| __ add(Operand(eax), Immediate(kPointerSize)); |
| __ bind(&entry); |
| __ cmp(eax, Operand(ecx)); |
| __ j(below, &loop); |
| } |
| |
| // Store the initialized FixedArray into the properties field of |
| // the JSObject |
| // ebx: JSObject |
| // edi: FixedArray |
| __ or_(Operand(edi), Immediate(kHeapObjectTag)); // add the heap tag |
| __ mov(FieldOperand(ebx, JSObject::kPropertiesOffset), edi); |
| |
| |
| // Continue with JSObject being successfully allocated |
| // ebx: JSObject |
| __ jmp(&allocated); |
| |
| // Undo the setting of the new top so that the heap is verifiable. For |
| // example, the map's unused properties potentially do not match the |
| // allocated objects unused properties. |
| // ebx: JSObject (previous new top) |
| __ bind(&undo_allocation); |
| __ UndoAllocationInNewSpace(ebx); |
| } |
| |
| // Allocate the new receiver object using the runtime call. |
| __ bind(&rt_call); |
| // Must restore edi (constructor) before calling runtime. |
| __ mov(edi, Operand(esp, 0)); |
| // edi: function (constructor) |
| __ push(edi); |
| __ CallRuntime(Runtime::kNewObject, 1); |
| __ mov(ebx, Operand(eax)); // store result in ebx |
| |
| // New object allocated. |
| // ebx: newly allocated object |
| __ bind(&allocated); |
| // Retrieve the function from the stack. |
| __ pop(edi); |
| |
| // Retrieve smi-tagged arguments count from the stack. |
| __ mov(eax, Operand(esp, 0)); |
| __ SmiUntag(eax); |
| |
| // Push the allocated receiver to the stack. We need two copies |
| // because we may have to return the original one and the calling |
| // conventions dictate that the called function pops the receiver. |
| __ push(ebx); |
| __ push(ebx); |
| |
| // Setup pointer to last argument. |
| __ lea(ebx, Operand(ebp, StandardFrameConstants::kCallerSPOffset)); |
| |
| // Copy arguments and receiver to the expression stack. |
| Label loop, entry; |
| __ mov(ecx, Operand(eax)); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ push(Operand(ebx, ecx, times_4, 0)); |
| __ bind(&entry); |
| __ dec(ecx); |
| __ j(greater_equal, &loop); |
| |
| // Call the function. |
| if (is_api_function) { |
| __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| Handle<Code> code = Handle<Code>( |
| Builtins::builtin(Builtins::HandleApiCallConstruct)); |
| ParameterCount expected(0); |
| __ InvokeCode(code, expected, expected, |
| RelocInfo::CODE_TARGET, CALL_FUNCTION); |
| } else { |
| ParameterCount actual(eax); |
| __ InvokeFunction(edi, actual, CALL_FUNCTION); |
| } |
| |
| // Restore context from the frame. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| |
| // If the result is an object (in the ECMA sense), we should get rid |
| // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| // on page 74. |
| Label use_receiver, exit; |
| |
| // If the result is a smi, it is *not* an object in the ECMA sense. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, &use_receiver, not_taken); |
| |
| // If the type of the result (stored in its map) is less than |
| // FIRST_JS_OBJECT_TYPE, it is not an object in the ECMA sense. |
| __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| __ j(greater_equal, &exit, not_taken); |
| |
| // Throw away the result of the constructor invocation and use the |
| // on-stack receiver as the result. |
| __ bind(&use_receiver); |
| __ mov(eax, Operand(esp, 0)); |
| |
| // Restore the arguments count and leave the construct frame. |
| __ bind(&exit); |
| __ mov(ebx, Operand(esp, kPointerSize)); // get arguments count |
| __ LeaveConstructFrame(); |
| |
| // Remove caller arguments from the stack and return. |
| ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| __ pop(ecx); |
| __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver |
| __ push(ecx); |
| __ IncrementCounter(&Counters::constructed_objects, 1); |
| __ ret(0); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, true); |
| } |
| |
| |
| static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| bool is_construct) { |
| // Clear the context before we push it when entering the JS frame. |
| __ xor_(esi, Operand(esi)); // clear esi |
| |
| // Enter an internal frame. |
| __ EnterInternalFrame(); |
| |
| // Load the previous frame pointer (ebx) to access C arguments |
| __ mov(ebx, Operand(ebp, 0)); |
| |
| // Get the function from the frame and setup the context. |
| __ mov(ecx, Operand(ebx, EntryFrameConstants::kFunctionArgOffset)); |
| __ mov(esi, FieldOperand(ecx, JSFunction::kContextOffset)); |
| |
| // Push the function and the receiver onto the stack. |
| __ push(ecx); |
| __ push(Operand(ebx, EntryFrameConstants::kReceiverArgOffset)); |
| |
| // Load the number of arguments and setup pointer to the arguments. |
| __ mov(eax, Operand(ebx, EntryFrameConstants::kArgcOffset)); |
| __ mov(ebx, Operand(ebx, EntryFrameConstants::kArgvOffset)); |
| |
| // Copy arguments to the stack in a loop. |
| Label loop, entry; |
| __ xor_(ecx, Operand(ecx)); // clear ecx |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ mov(edx, Operand(ebx, ecx, times_4, 0)); // push parameter from argv |
| __ push(Operand(edx, 0)); // dereference handle |
| __ inc(Operand(ecx)); |
| __ bind(&entry); |
| __ cmp(ecx, Operand(eax)); |
| __ j(not_equal, &loop); |
| |
| // Get the function from the stack and call it. |
| __ mov(edi, Operand(esp, eax, times_4, +1 * kPointerSize)); // +1 ~ receiver |
| |
| // Invoke the code. |
| if (is_construct) { |
| __ call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)), |
| RelocInfo::CODE_TARGET); |
| } else { |
| ParameterCount actual(eax); |
| __ InvokeFunction(edi, actual, CALL_FUNCTION); |
| } |
| |
| // Exit the JS frame. Notice that this also removes the empty |
| // context and the function left on the stack by the code |
| // invocation. |
| __ LeaveInternalFrame(); |
| __ ret(1 * kPointerSize); // remove receiver |
| } |
| |
| |
| void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, false); |
| } |
| |
| |
| void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, true); |
| } |
| |
| |
| void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| // 1. Make sure we have at least one argument. |
| { Label done; |
| __ test(eax, Operand(eax)); |
| __ j(not_zero, &done, taken); |
| __ pop(ebx); |
| __ push(Immediate(Factory::undefined_value())); |
| __ push(ebx); |
| __ inc(eax); |
| __ bind(&done); |
| } |
| |
| // 2. Get the function to call (passed as receiver) from the stack, check |
| // if it is a function. |
| Label non_function; |
| // 1 ~ return address. |
| __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize)); |
| __ test(edi, Immediate(kSmiTagMask)); |
| __ j(zero, &non_function, not_taken); |
| __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
| __ j(not_equal, &non_function, not_taken); |
| |
| |
| // 3a. Patch the first argument if necessary when calling a function. |
| Label shift_arguments; |
| { Label convert_to_object, use_global_receiver, patch_receiver; |
| // Change context eagerly in case we need the global receiver. |
| __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| |
| __ mov(ebx, Operand(esp, eax, times_4, 0)); // First argument. |
| __ test(ebx, Immediate(kSmiTagMask)); |
| __ j(zero, &convert_to_object); |
| |
| __ cmp(ebx, Factory::null_value()); |
| __ j(equal, &use_global_receiver); |
| __ cmp(ebx, Factory::undefined_value()); |
| __ j(equal, &use_global_receiver); |
| |
| __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset)); |
| __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| __ j(below, &convert_to_object); |
| __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| __ j(below_equal, &shift_arguments); |
| |
| __ bind(&convert_to_object); |
| __ EnterInternalFrame(); // In order to preserve argument count. |
| __ SmiTag(eax); |
| __ push(eax); |
| |
| __ push(ebx); |
| __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| __ mov(ebx, eax); |
| |
| __ pop(eax); |
| __ SmiUntag(eax); |
| __ LeaveInternalFrame(); |
| // Restore the function to edi. |
| __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize)); |
| __ jmp(&patch_receiver); |
| |
| // Use the global receiver object from the called function as the |
| // receiver. |
| __ bind(&use_global_receiver); |
| const int kGlobalIndex = |
| Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| __ mov(ebx, FieldOperand(esi, kGlobalIndex)); |
| __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalContextOffset)); |
| __ mov(ebx, FieldOperand(ebx, kGlobalIndex)); |
| __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); |
| |
| __ bind(&patch_receiver); |
| __ mov(Operand(esp, eax, times_4, 0), ebx); |
| |
| __ jmp(&shift_arguments); |
| } |
| |
| // 3b. Patch the first argument when calling a non-function. The |
| // CALL_NON_FUNCTION builtin expects the non-function callee as |
| // receiver, so overwrite the first argument which will ultimately |
| // become the receiver. |
| __ bind(&non_function); |
| __ mov(Operand(esp, eax, times_4, 0), edi); |
| // Clear edi to indicate a non-function being called. |
| __ xor_(edi, Operand(edi)); |
| |
| // 4. Shift arguments and return address one slot down on the stack |
| // (overwriting the original receiver). Adjust argument count to make |
| // the original first argument the new receiver. |
| __ bind(&shift_arguments); |
| { Label loop; |
| __ mov(ecx, eax); |
| __ bind(&loop); |
| __ mov(ebx, Operand(esp, ecx, times_4, 0)); |
| __ mov(Operand(esp, ecx, times_4, kPointerSize), ebx); |
| __ dec(ecx); |
| __ j(not_sign, &loop); // While non-negative (to copy return address). |
| __ pop(ebx); // Discard copy of return address. |
| __ dec(eax); // One fewer argument (first argument is new receiver). |
| } |
| |
| // 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin. |
| { Label function; |
| __ test(edi, Operand(edi)); |
| __ j(not_zero, &function, taken); |
| __ xor_(ebx, Operand(ebx)); |
| __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); |
| __ jmp(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)), |
| RelocInfo::CODE_TARGET); |
| __ bind(&function); |
| } |
| |
| // 5b. Get the code to call from the function and check that the number of |
| // expected arguments matches what we're providing. If so, jump |
| // (tail-call) to the code in register edx without checking arguments. |
| __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| __ mov(ebx, |
| FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); |
| __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| __ cmp(eax, Operand(ebx)); |
| __ j(not_equal, Handle<Code>(builtin(ArgumentsAdaptorTrampoline))); |
| |
| ParameterCount expected(0); |
| __ InvokeCode(Operand(edx), expected, expected, JUMP_FUNCTION); |
| } |
| |
| |
| void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
| __ EnterInternalFrame(); |
| |
| __ push(Operand(ebp, 4 * kPointerSize)); // push this |
| __ push(Operand(ebp, 2 * kPointerSize)); // push arguments |
| __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION); |
| |
| // Check the stack for overflow. We are not trying need to catch |
| // interruptions (e.g. debug break and preemption) here, so the "real stack |
| // limit" is checked. |
| Label okay; |
| ExternalReference real_stack_limit = |
| ExternalReference::address_of_real_stack_limit(); |
| __ mov(edi, Operand::StaticVariable(real_stack_limit)); |
| // Make ecx the space we have left. The stack might already be overflowed |
| // here which will cause ecx to become negative. |
| __ mov(ecx, Operand(esp)); |
| __ sub(ecx, Operand(edi)); |
| // Make edx the space we need for the array when it is unrolled onto the |
| // stack. |
| __ mov(edx, Operand(eax)); |
| __ shl(edx, kPointerSizeLog2 - kSmiTagSize); |
| // Check if the arguments will overflow the stack. |
| __ cmp(ecx, Operand(edx)); |
| __ j(greater, &okay, taken); // Signed comparison. |
| |
| // Out of stack space. |
| __ push(Operand(ebp, 4 * kPointerSize)); // push this |
| __ push(eax); |
| __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION); |
| __ bind(&okay); |
| // End of stack check. |
| |
| // Push current index and limit. |
| const int kLimitOffset = |
| StandardFrameConstants::kExpressionsOffset - 1 * kPointerSize; |
| const int kIndexOffset = kLimitOffset - 1 * kPointerSize; |
| __ push(eax); // limit |
| __ push(Immediate(0)); // index |
| |
| // Change context eagerly to get the right global object if |
| // necessary. |
| __ mov(edi, Operand(ebp, 4 * kPointerSize)); |
| __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| |
| // Compute the receiver. |
| Label call_to_object, use_global_receiver, push_receiver; |
| __ mov(ebx, Operand(ebp, 3 * kPointerSize)); |
| __ test(ebx, Immediate(kSmiTagMask)); |
| __ j(zero, &call_to_object); |
| __ cmp(ebx, Factory::null_value()); |
| __ j(equal, &use_global_receiver); |
| __ cmp(ebx, Factory::undefined_value()); |
| __ j(equal, &use_global_receiver); |
| |
| // If given receiver is already a JavaScript object then there's no |
| // reason for converting it. |
| __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset)); |
| __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| __ j(less, &call_to_object); |
| __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| __ j(less_equal, &push_receiver); |
| |
| // Convert the receiver to an object. |
| __ bind(&call_to_object); |
| __ push(ebx); |
| __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| __ mov(ebx, Operand(eax)); |
| __ jmp(&push_receiver); |
| |
| // Use the current global receiver object as the receiver. |
| __ bind(&use_global_receiver); |
| const int kGlobalOffset = |
| Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| __ mov(ebx, FieldOperand(esi, kGlobalOffset)); |
| __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalContextOffset)); |
| __ mov(ebx, FieldOperand(ebx, kGlobalOffset)); |
| __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); |
| |
| // Push the receiver. |
| __ bind(&push_receiver); |
| __ push(ebx); |
| |
| // Copy all arguments from the array to the stack. |
| Label entry, loop; |
| __ mov(eax, Operand(ebp, kIndexOffset)); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ mov(edx, Operand(ebp, 2 * kPointerSize)); // load arguments |
| |
| // Use inline caching to speed up access to arguments. |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| __ call(ic, RelocInfo::CODE_TARGET); |
| // It is important that we do not have a test instruction after the |
| // call. A test instruction after the call is used to indicate that |
| // we have generated an inline version of the keyed load. In this |
| // case, we know that we are not generating a test instruction next. |
| |
| // Push the nth argument. |
| __ push(eax); |
| |
| // Update the index on the stack and in register eax. |
| __ mov(eax, Operand(ebp, kIndexOffset)); |
| __ add(Operand(eax), Immediate(1 << kSmiTagSize)); |
| __ mov(Operand(ebp, kIndexOffset), eax); |
| |
| __ bind(&entry); |
| __ cmp(eax, Operand(ebp, kLimitOffset)); |
| __ j(not_equal, &loop); |
| |
| // Invoke the function. |
| ParameterCount actual(eax); |
| __ SmiUntag(eax); |
| __ mov(edi, Operand(ebp, 4 * kPointerSize)); |
| __ InvokeFunction(edi, actual, CALL_FUNCTION); |
| |
| __ LeaveInternalFrame(); |
| __ ret(3 * kPointerSize); // remove this, receiver, and arguments |
| } |
| |
| |
| // Load the built-in Array function from the current context. |
| static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| // Load the global context. |
| __ mov(result, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| __ mov(result, FieldOperand(result, GlobalObject::kGlobalContextOffset)); |
| // Load the Array function from the global context. |
| __ mov(result, |
| Operand(result, Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX))); |
| } |
| |
| |
| // Number of empty elements to allocate for an empty array. |
| static const int kPreallocatedArrayElements = 4; |
| |
| |
| // Allocate an empty JSArray. The allocated array is put into the result |
| // register. If the parameter initial_capacity is larger than zero an elements |
| // backing store is allocated with this size and filled with the hole values. |
| // Otherwise the elements backing store is set to the empty FixedArray. |
| static void AllocateEmptyJSArray(MacroAssembler* masm, |
| Register array_function, |
| Register result, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| int initial_capacity, |
| Label* gc_required) { |
| ASSERT(initial_capacity >= 0); |
| |
| // Load the initial map from the array function. |
| __ mov(scratch1, FieldOperand(array_function, |
| JSFunction::kPrototypeOrInitialMapOffset)); |
| |
| // Allocate the JSArray object together with space for a fixed array with the |
| // requested elements. |
| int size = JSArray::kSize; |
| if (initial_capacity > 0) { |
| size += FixedArray::SizeFor(initial_capacity); |
| } |
| __ AllocateInNewSpace(size, |
| result, |
| scratch2, |
| scratch3, |
| gc_required, |
| TAG_OBJECT); |
| |
| // Allocated the JSArray. Now initialize the fields except for the elements |
| // array. |
| // result: JSObject |
| // scratch1: initial map |
| // scratch2: start of next object |
| __ mov(FieldOperand(result, JSObject::kMapOffset), scratch1); |
| __ mov(FieldOperand(result, JSArray::kPropertiesOffset), |
| Factory::empty_fixed_array()); |
| // Field JSArray::kElementsOffset is initialized later. |
| __ mov(FieldOperand(result, JSArray::kLengthOffset), Immediate(0)); |
| |
| // If no storage is requested for the elements array just set the empty |
| // fixed array. |
| if (initial_capacity == 0) { |
| __ mov(FieldOperand(result, JSArray::kElementsOffset), |
| Factory::empty_fixed_array()); |
| return; |
| } |
| |
| // Calculate the location of the elements array and set elements array member |
| // of the JSArray. |
| // result: JSObject |
| // scratch2: start of next object |
| __ lea(scratch1, Operand(result, JSArray::kSize)); |
| __ mov(FieldOperand(result, JSArray::kElementsOffset), scratch1); |
| |
| // Initialize the FixedArray and fill it with holes. FixedArray length is not |
| // stored as a smi. |
| // result: JSObject |
| // scratch1: elements array |
| // scratch2: start of next object |
| __ mov(FieldOperand(scratch1, JSObject::kMapOffset), |
| Factory::fixed_array_map()); |
| __ mov(FieldOperand(scratch1, Array::kLengthOffset), |
| Immediate(initial_capacity)); |
| |
| // Fill the FixedArray with the hole value. Inline the code if short. |
| // Reconsider loop unfolding if kPreallocatedArrayElements gets changed. |
| static const int kLoopUnfoldLimit = 4; |
| ASSERT(kPreallocatedArrayElements <= kLoopUnfoldLimit); |
| if (initial_capacity <= kLoopUnfoldLimit) { |
| // Use a scratch register here to have only one reloc info when unfolding |
| // the loop. |
| __ mov(scratch3, Factory::the_hole_value()); |
| for (int i = 0; i < initial_capacity; i++) { |
| __ mov(FieldOperand(scratch1, |
| FixedArray::kHeaderSize + i * kPointerSize), |
| scratch3); |
| } |
| } else { |
| Label loop, entry; |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ mov(Operand(scratch1, 0), Factory::the_hole_value()); |
| __ add(Operand(scratch1), Immediate(kPointerSize)); |
| __ bind(&entry); |
| __ cmp(scratch1, Operand(scratch2)); |
| __ j(below, &loop); |
| } |
| } |
| |
| |
| // Allocate a JSArray with the number of elements stored in a register. The |
| // register array_function holds the built-in Array function and the register |
| // array_size holds the size of the array as a smi. The allocated array is put |
| // into the result register and beginning and end of the FixedArray elements |
| // storage is put into registers elements_array and elements_array_end (see |
| // below for when that is not the case). If the parameter fill_with_holes is |
| // true the allocated elements backing store is filled with the hole values |
| // otherwise it is left uninitialized. When the backing store is filled the |
| // register elements_array is scratched. |
| static void AllocateJSArray(MacroAssembler* masm, |
| Register array_function, // Array function. |
| Register array_size, // As a smi. |
| Register result, |
| Register elements_array, |
| Register elements_array_end, |
| Register scratch, |
| bool fill_with_hole, |
| Label* gc_required) { |
| Label not_empty, allocated; |
| |
| // Load the initial map from the array function. |
| __ mov(elements_array, |
| FieldOperand(array_function, |
| JSFunction::kPrototypeOrInitialMapOffset)); |
| |
| // Check whether an empty sized array is requested. |
| __ test(array_size, Operand(array_size)); |
| __ j(not_zero, ¬_empty); |
| |
| // If an empty array is requested allocate a small elements array anyway. This |
| // keeps the code below free of special casing for the empty array. |
| int size = JSArray::kSize + FixedArray::SizeFor(kPreallocatedArrayElements); |
| __ AllocateInNewSpace(size, |
| result, |
| elements_array_end, |
| scratch, |
| gc_required, |
| TAG_OBJECT); |
| __ jmp(&allocated); |
| |
| // Allocate the JSArray object together with space for a FixedArray with the |
| // requested elements. |
| __ bind(¬_empty); |
| ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| __ AllocateInNewSpace(JSArray::kSize + FixedArray::kHeaderSize, |
| times_half_pointer_size, // array_size is a smi. |
| array_size, |
| result, |
| elements_array_end, |
| scratch, |
| gc_required, |
| TAG_OBJECT); |
| |
| // Allocated the JSArray. Now initialize the fields except for the elements |
| // array. |
| // result: JSObject |
| // elements_array: initial map |
| // elements_array_end: start of next object |
| // array_size: size of array (smi) |
| __ bind(&allocated); |
| __ mov(FieldOperand(result, JSObject::kMapOffset), elements_array); |
| __ mov(elements_array, Factory::empty_fixed_array()); |
| __ mov(FieldOperand(result, JSArray::kPropertiesOffset), elements_array); |
| // Field JSArray::kElementsOffset is initialized later. |
| __ mov(FieldOperand(result, JSArray::kLengthOffset), array_size); |
| |
| // Calculate the location of the elements array and set elements array member |
| // of the JSArray. |
| // result: JSObject |
| // elements_array_end: start of next object |
| // array_size: size of array (smi) |
| __ lea(elements_array, Operand(result, JSArray::kSize)); |
| __ mov(FieldOperand(result, JSArray::kElementsOffset), elements_array); |
| |
| // Initialize the fixed array. FixedArray length is not stored as a smi. |
| // result: JSObject |
| // elements_array: elements array |
| // elements_array_end: start of next object |
| // array_size: size of array (smi) |
| ASSERT(kSmiTag == 0); |
| __ SmiUntag(array_size); // Convert from smi to value. |
| __ mov(FieldOperand(elements_array, JSObject::kMapOffset), |
| Factory::fixed_array_map()); |
| Label not_empty_2, fill_array; |
| __ test(array_size, Operand(array_size)); |
| __ j(not_zero, ¬_empty_2); |
| // Length of the FixedArray is the number of pre-allocated elements even |
| // though the actual JSArray has length 0. |
| __ mov(FieldOperand(elements_array, Array::kLengthOffset), |
| Immediate(kPreallocatedArrayElements)); |
| __ jmp(&fill_array); |
| __ bind(¬_empty_2); |
| // For non-empty JSArrays the length of the FixedArray and the JSArray is the |
| // same. |
| __ mov(FieldOperand(elements_array, Array::kLengthOffset), array_size); |
| |
| // Fill the allocated FixedArray with the hole value if requested. |
| // result: JSObject |
| // elements_array: elements array |
| // elements_array_end: start of next object |
| __ bind(&fill_array); |
| if (fill_with_hole) { |
| Label loop, entry; |
| __ mov(scratch, Factory::the_hole_value()); |
| __ lea(elements_array, Operand(elements_array, |
| FixedArray::kHeaderSize - kHeapObjectTag)); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ mov(Operand(elements_array, 0), scratch); |
| __ add(Operand(elements_array), Immediate(kPointerSize)); |
| __ bind(&entry); |
| __ cmp(elements_array, Operand(elements_array_end)); |
| __ j(below, &loop); |
| } |
| } |
| |
| |
| // Create a new array for the built-in Array function. This function allocates |
| // the JSArray object and the FixedArray elements array and initializes these. |
| // If the Array cannot be constructed in native code the runtime is called. This |
| // function assumes the following state: |
| // edi: constructor (built-in Array function) |
| // eax: argc |
| // esp[0]: return address |
| // esp[4]: last argument |
| // This function is used for both construct and normal calls of Array. Whether |
| // it is a construct call or not is indicated by the construct_call parameter. |
| // The only difference between handling a construct call and a normal call is |
| // that for a construct call the constructor function in edi needs to be |
| // preserved for entering the generic code. In both cases argc in eax needs to |
| // be preserved. |
| static void ArrayNativeCode(MacroAssembler* masm, |
| bool construct_call, |
| Label* call_generic_code) { |
| Label argc_one_or_more, argc_two_or_more, prepare_generic_code_call; |
| |
| // Push the constructor and argc. No need to tag argc as a smi, as there will |
| // be no garbage collection with this on the stack. |
| int push_count = 0; |
| if (construct_call) { |
| push_count++; |
| __ push(edi); |
| } |
| push_count++; |
| __ push(eax); |
| |
| // Check for array construction with zero arguments. |
| __ test(eax, Operand(eax)); |
| __ j(not_zero, &argc_one_or_more); |
| |
| // Handle construction of an empty array. |
| AllocateEmptyJSArray(masm, |
| edi, |
| eax, |
| ebx, |
| ecx, |
| edi, |
| kPreallocatedArrayElements, |
| &prepare_generic_code_call); |
| __ IncrementCounter(&Counters::array_function_native, 1); |
| __ pop(ebx); |
| if (construct_call) { |
| __ pop(edi); |
| } |
| __ ret(kPointerSize); |
| |
| // Check for one argument. Bail out if argument is not smi or if it is |
| // negative. |
| __ bind(&argc_one_or_more); |
| __ cmp(eax, 1); |
| __ j(not_equal, &argc_two_or_more); |
| ASSERT(kSmiTag == 0); |
| __ test(Operand(esp, (push_count + 1) * kPointerSize), |
| Immediate(kIntptrSignBit | kSmiTagMask)); |
| __ j(not_zero, &prepare_generic_code_call); |
| |
| // Handle construction of an empty array of a certain size. Get the size from |
| // the stack and bail out if size is to large to actually allocate an elements |
| // array. |
| __ mov(edx, Operand(esp, (push_count + 1) * kPointerSize)); |
| ASSERT(kSmiTag == 0); |
| __ cmp(edx, JSObject::kInitialMaxFastElementArray << kSmiTagSize); |
| __ j(greater_equal, &prepare_generic_code_call); |
| |
| // edx: array_size (smi) |
| // edi: constructor |
| // esp[0]: argc |
| // esp[4]: constructor (only if construct_call) |
| // esp[8]: return address |
| // esp[C]: argument |
| AllocateJSArray(masm, |
| edi, |
| edx, |
| eax, |
| ebx, |
| ecx, |
| edi, |
| true, |
| &prepare_generic_code_call); |
| __ IncrementCounter(&Counters::array_function_native, 1); |
| __ pop(ebx); |
| if (construct_call) { |
| __ pop(edi); |
| } |
| __ ret(2 * kPointerSize); |
| |
| // Handle construction of an array from a list of arguments. |
| __ bind(&argc_two_or_more); |
| ASSERT(kSmiTag == 0); |
| __ SmiTag(eax); // Convet argc to a smi. |
| // eax: array_size (smi) |
| // edi: constructor |
| // esp[0] : argc |
| // esp[4]: constructor (only if construct_call) |
| // esp[8] : return address |
| // esp[C] : last argument |
| AllocateJSArray(masm, |
| edi, |
| eax, |
| ebx, |
| ecx, |
| edx, |
| edi, |
| false, |
| &prepare_generic_code_call); |
| __ IncrementCounter(&Counters::array_function_native, 1); |
| __ mov(eax, ebx); |
| __ pop(ebx); |
| if (construct_call) { |
| __ pop(edi); |
| } |
| __ push(eax); |
| // eax: JSArray |
| // ebx: argc |
| // edx: elements_array_end (untagged) |
| // esp[0]: JSArray |
| // esp[4]: return address |
| // esp[8]: last argument |
| |
| // Location of the last argument |
| __ lea(edi, Operand(esp, 2 * kPointerSize)); |
| |
| // Location of the first array element (Parameter fill_with_holes to |
| // AllocateJSArrayis false, so the FixedArray is returned in ecx). |
| __ lea(edx, Operand(ecx, FixedArray::kHeaderSize - kHeapObjectTag)); |
| |
| // ebx: argc |
| // edx: location of the first array element |
| // edi: location of the last argument |
| // esp[0]: JSArray |
| // esp[4]: return address |
| // esp[8]: last argument |
| Label loop, entry; |
| __ mov(ecx, ebx); |
| __ jmp(&entry); |
| __ bind(&loop); |
| __ mov(eax, Operand(edi, ecx, times_pointer_size, 0)); |
| __ mov(Operand(edx, 0), eax); |
| __ add(Operand(edx), Immediate(kPointerSize)); |
| __ bind(&entry); |
| __ dec(ecx); |
| __ j(greater_equal, &loop); |
| |
| // Remove caller arguments from the stack and return. |
| // ebx: argc |
| // esp[0]: JSArray |
| // esp[4]: return address |
| // esp[8]: last argument |
| __ pop(eax); |
| __ pop(ecx); |
| __ lea(esp, Operand(esp, ebx, times_pointer_size, 1 * kPointerSize)); |
| __ push(ecx); |
| __ ret(0); |
| |
| // Restore argc and constructor before running the generic code. |
| __ bind(&prepare_generic_code_call); |
| __ pop(eax); |
| if (construct_call) { |
| __ pop(edi); |
| } |
| __ jmp(call_generic_code); |
| } |
| |
| |
| void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : argc |
| // -- esp[0] : return address |
| // -- esp[4] : last argument |
| // ----------------------------------- |
| Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| |
| // Get the Array function. |
| GenerateLoadArrayFunction(masm, edi); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin Array function shoud be a map. |
| __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| __ test(ebx, Immediate(kSmiTagMask)); |
| __ Assert(not_zero, "Unexpected initial map for Array function"); |
| __ CmpObjectType(ebx, MAP_TYPE, ecx); |
| __ Assert(equal, "Unexpected initial map for Array function"); |
| } |
| |
| // Run the native code for the Array function called as a normal function. |
| ArrayNativeCode(masm, false, &generic_array_code); |
| |
| // Jump to the generic array code in case the specialized code cannot handle |
| // the construction. |
| __ bind(&generic_array_code); |
| Code* code = Builtins::builtin(Builtins::ArrayCodeGeneric); |
| Handle<Code> array_code(code); |
| __ jmp(array_code, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : argc |
| // -- edi : constructor |
| // -- esp[0] : return address |
| // -- esp[4] : last argument |
| // ----------------------------------- |
| Label generic_constructor; |
| |
| if (FLAG_debug_code) { |
| // The array construct code is only set for the builtin Array function which |
| // does always have a map. |
| GenerateLoadArrayFunction(masm, ebx); |
| __ cmp(edi, Operand(ebx)); |
| __ Assert(equal, "Unexpected Array function"); |
| // Initial map for the builtin Array function should be a map. |
| __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| __ test(ebx, Immediate(kSmiTagMask)); |
| __ Assert(not_zero, "Unexpected initial map for Array function"); |
| __ CmpObjectType(ebx, MAP_TYPE, ecx); |
| __ Assert(equal, "Unexpected initial map for Array function"); |
| } |
| |
| // Run the native code for the Array function called as constructor. |
| ArrayNativeCode(masm, true, &generic_constructor); |
| |
| // Jump to the generic construct code in case the specialized code cannot |
| // handle the construction. |
| __ bind(&generic_constructor); |
| Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric); |
| Handle<Code> generic_construct_stub(code); |
| __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| __ push(ebp); |
| __ mov(ebp, Operand(esp)); |
| |
| // Store the arguments adaptor context sentinel. |
| __ push(Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| |
| // Push the function on the stack. |
| __ push(edi); |
| |
| // Preserve the number of arguments on the stack. Must preserve both |
| // eax and ebx because these registers are used when copying the |
| // arguments and the receiver. |
| ASSERT(kSmiTagSize == 1); |
| __ lea(ecx, Operand(eax, eax, times_1, kSmiTag)); |
| __ push(ecx); |
| } |
| |
| |
| static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| // Retrieve the number of arguments from the stack. |
| __ mov(ebx, Operand(ebp, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| |
| // Leave the frame. |
| __ leave(); |
| |
| // Remove caller arguments from the stack. |
| ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| __ pop(ecx); |
| __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver |
| __ push(ecx); |
| } |
| |
| |
| void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : actual number of arguments |
| // -- ebx : expected number of arguments |
| // -- edx : code entry to call |
| // ----------------------------------- |
| |
| Label invoke, dont_adapt_arguments; |
| __ IncrementCounter(&Counters::arguments_adaptors, 1); |
| |
| Label enough, too_few; |
| __ cmp(eax, Operand(ebx)); |
| __ j(less, &too_few); |
| __ cmp(ebx, SharedFunctionInfo::kDontAdaptArgumentsSentinel); |
| __ j(equal, &dont_adapt_arguments); |
| |
| { // Enough parameters: Actual >= expected. |
| __ bind(&enough); |
| EnterArgumentsAdaptorFrame(masm); |
| |
| // Copy receiver and all expected arguments. |
| const int offset = StandardFrameConstants::kCallerSPOffset; |
| __ lea(eax, Operand(ebp, eax, times_4, offset)); |
| __ mov(ecx, -1); // account for receiver |
| |
| Label copy; |
| __ bind(©); |
| __ inc(ecx); |
| __ push(Operand(eax, 0)); |
| __ sub(Operand(eax), Immediate(kPointerSize)); |
| __ cmp(ecx, Operand(ebx)); |
| __ j(less, ©); |
| __ jmp(&invoke); |
| } |
| |
| { // Too few parameters: Actual < expected. |
| __ bind(&too_few); |
| EnterArgumentsAdaptorFrame(masm); |
| |
| // Copy receiver and all actual arguments. |
| const int offset = StandardFrameConstants::kCallerSPOffset; |
| __ lea(edi, Operand(ebp, eax, times_4, offset)); |
| __ mov(ecx, -1); // account for receiver |
| |
| Label copy; |
| __ bind(©); |
| __ inc(ecx); |
| __ push(Operand(edi, 0)); |
| __ sub(Operand(edi), Immediate(kPointerSize)); |
| __ cmp(ecx, Operand(eax)); |
| __ j(less, ©); |
| |
| // Fill remaining expected arguments with undefined values. |
| Label fill; |
| __ bind(&fill); |
| __ inc(ecx); |
| __ push(Immediate(Factory::undefined_value())); |
| __ cmp(ecx, Operand(ebx)); |
| __ j(less, &fill); |
| |
| // Restore function pointer. |
| __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| |
| // Call the entry point. |
| __ bind(&invoke); |
| __ call(Operand(edx)); |
| |
| // Leave frame and return. |
| LeaveArgumentsAdaptorFrame(masm); |
| __ ret(0); |
| |
| // ------------------------------------------- |
| // Dont adapt arguments. |
| // ------------------------------------------- |
| __ bind(&dont_adapt_arguments); |
| __ jmp(Operand(edx)); |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
