diff options
Diffstat (limited to 'deps/v8/src/builtins/ia32/builtins-ia32.cc')
| -rw-r--r-- | deps/v8/src/builtins/ia32/builtins-ia32.cc | 434 |
1 files changed, 358 insertions, 76 deletions
diff --git a/deps/v8/src/builtins/ia32/builtins-ia32.cc b/deps/v8/src/builtins/ia32/builtins-ia32.cc index 5bea93214cc..04a1fa9e0db 100644 --- a/deps/v8/src/builtins/ia32/builtins-ia32.cc +++ b/deps/v8/src/builtins/ia32/builtins-ia32.cc @@ -130,31 +130,22 @@ void Generate_JSBuiltinsConstructStubHelper(MacroAssembler* masm) { __ push(eax); __ SmiUntag(eax); +#ifdef V8_REVERSE_JSARGS + // Set up pointer to first argument (skip receiver). + __ lea(esi, Operand(ebp, StandardFrameConstants::kCallerSPOffset + + kSystemPointerSize)); + // Copy arguments to the expression stack. + __ PushArray(esi, eax, ecx); + // The receiver for the builtin/api call. + __ PushRoot(RootIndex::kTheHoleValue); +#else // The receiver for the builtin/api call. __ PushRoot(RootIndex::kTheHoleValue); - // Set up pointer to last argument. We are using esi as scratch register. __ lea(esi, Operand(ebp, StandardFrameConstants::kCallerSPOffset)); - - // Copy arguments and receiver to the expression stack. - Label loop, entry; - __ mov(ecx, eax); - // ----------- S t a t e ------------- - // -- eax: number of arguments (untagged) - // -- edi: constructor function - // -- edx: new target - // -- esi: pointer to last argument - // -- ecx: counter - // -- sp[0*kSystemPointerSize]: the hole (receiver) - // -- sp[1*kSystemPointerSize]: number of arguments (tagged) - // -- sp[2*kSystemPointerSize]: context - // ----------------------------------- - __ jmp(&entry); - __ bind(&loop); - __ push(Operand(esi, ecx, times_system_pointer_size, 0)); - __ bind(&entry); - __ dec(ecx); - __ j(greater_equal, &loop); + // Copy arguments to the expression stack. + __ PushArray(esi, eax, ecx); +#endif // Call the function. // eax: number of arguments (untagged) @@ -254,29 +245,34 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { // Restore new target. __ Pop(edx); - // 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 the allocated receiver to the stack. __ Push(eax); + +#ifdef V8_REVERSE_JSARGS + // 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. The second copy is pushed after the arguments, we saved in r8 + // since rax needs to store the number of arguments before + // InvokingFunction. + __ movd(xmm0, eax); + + // Set up pointer to first argument (skip receiver). + __ lea(edi, Operand(ebp, StandardFrameConstants::kCallerSPOffset + + kSystemPointerSize)); +#else + // 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(eax); - // ----------- S t a t e ------------- - // -- edx: new target - // -- sp[0*kSystemPointerSize]: implicit receiver - // -- sp[1*kSystemPointerSize]: implicit receiver - // -- sp[2*kSystemPointerSize]: padding - // -- sp[3*kSystemPointerSize]: constructor function - // -- sp[4*kSystemPointerSize]: number of arguments (tagged) - // -- sp[5*kSystemPointerSize]: context - // ----------------------------------- + // Set up pointer to last argument. + __ lea(edi, Operand(ebp, StandardFrameConstants::kCallerSPOffset)); +#endif // Restore argument count. __ mov(eax, Operand(ebp, ConstructFrameConstants::kLengthOffset)); __ SmiUntag(eax); - // Set up pointer to last argument. - __ lea(edi, Operand(ebp, StandardFrameConstants::kCallerSPOffset)); - // Check if we have enough stack space to push all arguments. // Argument count in eax. Clobbers ecx. Label enough_stack_space, stack_overflow; @@ -292,27 +288,14 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { __ bind(&enough_stack_space); - // Copy arguments and receiver to the expression stack. - Label loop, entry; - __ mov(ecx, eax); - // ----------- S t a t e ------------- - // -- eax: number of arguments (untagged) - // -- edx: new target - // -- edi: pointer to last argument - // -- ecx: counter (tagged) - // -- sp[0*kSystemPointerSize]: implicit receiver - // -- sp[1*kSystemPointerSize]: implicit receiver - // -- sp[2*kSystemPointerSize]: padding - // -- sp[3*kSystemPointerSize]: constructor function - // -- sp[4*kSystemPointerSize]: number of arguments (tagged) - // -- sp[5*kSystemPointerSize]: context - // ----------------------------------- - __ jmp(&entry, Label::kNear); - __ bind(&loop); - __ Push(Operand(edi, ecx, times_system_pointer_size, 0)); - __ bind(&entry); - __ dec(ecx); - __ j(greater_equal, &loop); + // Copy arguments to the expression stack. + __ PushArray(edi, eax, ecx); + +#ifdef V8_REVERSE_JSARGS + // Push implicit receiver. + __ movd(ecx, xmm0); + __ Push(ecx); +#endif // Restore and and call the constructor function. __ mov(edi, Operand(ebp, ConstructFrameConstants::kConstructorOffset)); @@ -536,9 +519,13 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, // Load the previous frame pointer (edx) to access C arguments __ mov(scratch1, Operand(ebp, 0)); - // Push the function and the receiver onto the stack. + // Push the function. __ push(Operand(scratch1, EntryFrameConstants::kFunctionArgOffset)); + +#ifndef V8_REVERSE_JSARGS + // And the receiver onto the stack. __ push(Operand(scratch1, EntryFrameConstants::kReceiverArgOffset)); +#endif // Load the number of arguments and setup pointer to the arguments. __ mov(eax, Operand(scratch1, EntryFrameConstants::kArgcOffset)); @@ -558,6 +545,18 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, __ bind(&enough_stack_space); // Copy arguments to the stack in a loop. +#ifdef V8_REVERSE_JSARGS + Label loop, entry; + __ Move(ecx, eax); + __ jmp(&entry, Label::kNear); + __ bind(&loop); + // Push the parameter from argv. + __ mov(scratch2, Operand(scratch1, ecx, times_system_pointer_size, 0)); + __ push(Operand(scratch2, 0)); // dereference handle + __ bind(&entry); + __ dec(ecx); + __ j(greater_equal, &loop); +#else Label loop, entry; __ Move(ecx, Immediate(0)); __ jmp(&entry, Label::kNear); @@ -569,10 +568,16 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, __ bind(&entry); __ cmp(ecx, eax); __ j(not_equal, &loop); +#endif - // Load the previous frame pointer (ebx) to access C arguments + // Load the previous frame pointer to access C arguments __ mov(scratch2, Operand(ebp, 0)); +#ifdef V8_REVERSE_JSARGS + // Push the receiver onto the stack. + __ push(Operand(scratch2, EntryFrameConstants::kReceiverArgOffset)); +#endif + // Get the new.target and function from the frame. __ mov(edx, Operand(scratch2, EntryFrameConstants::kNewTargetArgOffset)); __ mov(edi, Operand(scratch2, EntryFrameConstants::kFunctionArgOffset)); @@ -662,15 +667,17 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) { // Pop return address. __ PopReturnAddressTo(eax); +#ifndef V8_REVERSE_JSARGS // Push receiver. __ Push(FieldOperand(edx, JSGeneratorObject::kReceiverOffset)); +#endif // ----------- S t a t e ------------- // -- eax : return address // -- edx : the JSGeneratorObject to resume // -- edi : generator function // -- esi : generator context - // -- esp[0] : generator receiver + // -- esp[0] : generator receiver, if V8_REVERSE_JSARGS is not set // ----------------------------------- { @@ -682,6 +689,24 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) { ecx, SharedFunctionInfo::kFormalParameterCountOffset)); __ mov(ebx, FieldOperand(edx, JSGeneratorObject::kParametersAndRegistersOffset)); +#ifdef V8_REVERSE_JSARGS + { + Label done_loop, loop; + __ mov(edi, ecx); + + __ bind(&loop); + __ dec(edi); + __ j(less, &done_loop); + __ Push( + FieldOperand(ebx, edi, times_tagged_size, FixedArray::kHeaderSize)); + __ jmp(&loop); + + __ bind(&done_loop); + } + + // Push receiver. + __ Push(FieldOperand(edx, JSGeneratorObject::kReceiverOffset)); +#else { Label done_loop, loop; __ Set(edi, 0); @@ -689,13 +714,14 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) { __ bind(&loop); __ cmp(edi, ecx); __ j(greater_equal, &done_loop); - __ Push(FieldOperand(ebx, edi, times_system_pointer_size, - FixedArray::kHeaderSize)); + __ Push( + FieldOperand(ebx, edi, times_tagged_size, FixedArray::kHeaderSize)); __ add(edi, Immediate(1)); __ jmp(&loop); __ bind(&done_loop); } +#endif // Restore registers. __ mov(edi, FieldOperand(edx, JSGeneratorObject::kFunctionOffset)); @@ -1211,11 +1237,19 @@ static void Generate_InterpreterPushArgs(MacroAssembler* masm, Label loop_header, loop_check; __ jmp(&loop_check); __ bind(&loop_header); +#ifdef V8_REVERSE_JSARGS + __ Push(Operand(array_limit, 0)); + __ bind(&loop_check); + __ add(array_limit, Immediate(kSystemPointerSize)); + __ cmp(array_limit, start_address); + __ j(below_equal, &loop_header, Label::kNear); +#else __ Push(Operand(start_address, 0)); __ sub(start_address, Immediate(kSystemPointerSize)); __ bind(&loop_check); __ cmp(start_address, array_limit); __ j(above, &loop_header, Label::kNear); +#endif } // static @@ -1235,6 +1269,14 @@ void Builtins::Generate_InterpreterPushArgsThenCallImpl( const Register argv = ecx; Label stack_overflow; + +#ifdef V8_REVERSE_JSARGS + if (mode == InterpreterPushArgsMode::kWithFinalSpread) { + // The spread argument should not be pushed. + __ dec(eax); + } +#endif + // Add a stack check before pushing the arguments. Generate_StackOverflowCheck(masm, eax, scratch, &stack_overflow, true); @@ -1242,11 +1284,37 @@ void Builtins::Generate_InterpreterPushArgsThenCallImpl( // Compute the expected number of arguments. __ mov(scratch, eax); - __ add(scratch, Immediate(1)); // Add one for receiver. // Pop return address to allow tail-call after pushing arguments. __ PopReturnAddressTo(eax); +#ifdef V8_REVERSE_JSARGS + if (receiver_mode != ConvertReceiverMode::kNullOrUndefined) { + __ add(scratch, Immediate(1)); // Add one for receiver. + } + + // Find the address of the last argument. + __ shl(scratch, kSystemPointerSizeLog2); + __ neg(scratch); + __ add(scratch, argv); + + if (mode == InterpreterPushArgsMode::kWithFinalSpread) { + __ movd(xmm1, scratch); + Generate_InterpreterPushArgs(masm, scratch, argv); + // Pass the spread in the register ecx. + __ movd(ecx, xmm1); + __ mov(ecx, Operand(ecx, 0)); + } else { + Generate_InterpreterPushArgs(masm, scratch, argv); + } + + // Push "undefined" as the receiver arg if we need to. + if (receiver_mode == ConvertReceiverMode::kNullOrUndefined) { + __ PushRoot(RootIndex::kUndefinedValue); + } +#else + __ add(scratch, Immediate(1)); // Add one for receiver. + // Push "undefined" as the receiver arg if we need to. if (receiver_mode == ConvertReceiverMode::kNullOrUndefined) { __ PushRoot(RootIndex::kUndefinedValue); @@ -1259,18 +1327,22 @@ void Builtins::Generate_InterpreterPushArgsThenCallImpl( __ add(scratch, argv); Generate_InterpreterPushArgs(masm, scratch, argv); - // Call the target. - if (mode == InterpreterPushArgsMode::kWithFinalSpread) { __ Pop(ecx); // Pass the spread in a register - __ PushReturnAddressFrom(eax); - __ movd(eax, xmm0); // Restore number of arguments. + } +#endif + + __ PushReturnAddressFrom(eax); + __ movd(eax, xmm0); // Restore number of arguments. + + // Call the target. + if (mode == InterpreterPushArgsMode::kWithFinalSpread) { +#ifndef V8_REVERSE_JSARGS __ sub(eax, Immediate(1)); // Subtract one for spread +#endif __ Jump(BUILTIN_CODE(masm->isolate(), CallWithSpread), RelocInfo::CODE_TARGET); } else { - __ PushReturnAddressFrom(eax); - __ movd(eax, xmm0); // Restore number of arguments. __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny), RelocInfo::CODE_TARGET); } @@ -1328,6 +1400,25 @@ void Generate_InterpreterPushZeroAndArgsAndReturnAddress( // Step 3 copy arguments to correct locations. // Slot meant for receiver contains return address. Reset it so that // we will not incorrectly interpret return address as an object. +#ifdef V8_REVERSE_JSARGS + __ mov(Operand(esp, (num_slots_to_move + 1) * kSystemPointerSize), + Immediate(0)); + __ mov(scratch1, Immediate(0)); + + Label loop_header, loop_check; + __ jmp(&loop_check); + __ bind(&loop_header); + __ mov(scratch2, Operand(start_addr, 0)); + __ mov(Operand(esp, scratch1, times_system_pointer_size, + (num_slots_to_move + 1) * kSystemPointerSize), + scratch2); + __ sub(start_addr, Immediate(kSystemPointerSize)); + __ bind(&loop_check); + __ inc(scratch1); + __ cmp(scratch1, eax); + __ j(less_equal, &loop_header, Label::kNear); + +#else __ mov(Operand(esp, num_args, times_system_pointer_size, (num_slots_to_move + 1) * kSystemPointerSize), Immediate(0)); @@ -1345,6 +1436,7 @@ void Generate_InterpreterPushZeroAndArgsAndReturnAddress( __ bind(&loop_check); __ cmp(scratch1, Immediate(0)); __ j(greater, &loop_header, Label::kNear); +#endif } } // end anonymous namespace @@ -1362,9 +1454,15 @@ void Builtins::Generate_InterpreterPushArgsThenConstructImpl( // -- esp[8] : the new target // -- esp[12] : the constructor // ----------------------------------- - Label stack_overflow; +#ifdef V8_REVERSE_JSARGS + if (mode == InterpreterPushArgsMode::kWithFinalSpread) { + // The spread argument should not be pushed. + __ dec(eax); + } +#endif + // Push arguments and move return address and stack spill slots to the top of // stack. The eax register is readonly. The ecx register will be modified. edx // and edi are used as scratch registers. @@ -1399,11 +1497,17 @@ void Builtins::Generate_InterpreterPushArgsThenConstructImpl( __ Drop(1); // The allocation site is unused. __ Pop(kJavaScriptCallNewTargetRegister); __ Pop(kJavaScriptCallTargetRegister); +#ifdef V8_REVERSE_JSARGS + // Pass the spread in the register ecx, overwriting ecx. + __ mov(ecx, Operand(ecx, 0)); + __ PushReturnAddressFrom(eax); + __ movd(eax, xmm0); // Reload number of arguments. +#else __ Pop(ecx); // Pop the spread (i.e. the first argument), overwriting ecx. __ PushReturnAddressFrom(eax); __ movd(eax, xmm0); // Reload number of arguments. __ sub(eax, Immediate(1)); // The actual argc thus decrements by one. - +#endif __ Jump(BUILTIN_CODE(masm->isolate(), ConstructWithSpread), RelocInfo::CODE_TARGET); } else { @@ -1705,9 +1809,35 @@ void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) { // ... // esp[8 * n] : Argument 1 // esp[8 * (n + 1)] : Receiver (callable to call) - // + // NOTE: The order of args are reversed if V8_REVERSE_JSARGS // eax contains the number of arguments, n, not counting the receiver. - // + +#ifdef V8_REVERSE_JSARGS + // 1. Get the callable to call (passed as receiver) from the stack. + { + StackArgumentsAccessor args(eax); + __ mov(edi, args.GetReceiverOperand()); + } + + // 2. Save the return address and drop the callable. + __ PopReturnAddressTo(edx); + __ Pop(ecx); + + // 3. Make sure we have at least one argument. + { + Label done; + __ test(eax, eax); + __ j(not_zero, &done, Label::kNear); + __ PushRoot(RootIndex::kUndefinedValue); + __ inc(eax); + __ bind(&done); + } + + // 4. Push back the return address one slot down on the stack (overwriting the + // original callable), making the original first argument the new receiver. + __ PushReturnAddressFrom(edx); + __ dec(eax); // One fewer argument (first argument is new receiver). +#else // 1. Make sure we have at least one argument. { Label done; @@ -1741,6 +1871,7 @@ void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) { __ pop(edx); // Discard copy of return address. __ dec(eax); // One fewer argument (first argument is new receiver). } +#endif // 4. Call the callable. __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); @@ -1956,6 +2087,56 @@ void Builtins::Generate_CallOrConstructVarargs(MacroAssembler* masm, Label stack_overflow; Generate_StackOverflowCheck(masm, kArgumentsLength, edx, &stack_overflow); +#ifdef V8_REVERSE_JSARGS + __ movd(xmm4, kArgumentsList); // Spill the arguments list. + + // Move the arguments already in the stack, + // including the receiver and the return address. + { + Label copy, check; + Register src = edx, current = edi, tmp = esi; + // Update stack pointer. + __ mov(src, esp); + __ lea(tmp, Operand(kArgumentsLength, times_system_pointer_size, 0)); + __ AllocateStackSpace(tmp); + // Include return address and receiver. + __ add(eax, Immediate(2)); + __ mov(current, Immediate(0)); + __ jmp(&check); + // Loop. + __ bind(©); + __ mov(tmp, Operand(src, current, times_system_pointer_size, 0)); + __ mov(Operand(esp, current, times_system_pointer_size, 0), tmp); + __ inc(current); + __ bind(&check); + __ cmp(current, eax); + __ j(less, ©); + __ lea(edx, Operand(esp, eax, times_system_pointer_size, 0)); + } + + __ movd(kArgumentsList, xmm4); // Recover arguments list. + + // Push additional arguments onto the stack. + { + __ Move(eax, Immediate(0)); + Label done, push, loop; + __ bind(&loop); + __ cmp(eax, kArgumentsLength); + __ j(equal, &done, Label::kNear); + // Turn the hole into undefined as we go. + __ mov(edi, FieldOperand(kArgumentsList, eax, times_tagged_size, + FixedArray::kHeaderSize)); + __ CompareRoot(edi, RootIndex::kTheHoleValue); + __ j(not_equal, &push, Label::kNear); + __ LoadRoot(edi, RootIndex::kUndefinedValue); + __ bind(&push); + __ mov(Operand(edx, 0), edi); + __ add(edx, Immediate(kSystemPointerSize)); + __ inc(eax); + __ jmp(&loop); + __ bind(&done); + } +#else // !V8_REVERSE_JSARGS // Push additional arguments onto the stack. { __ PopReturnAddressTo(edx); @@ -1965,7 +2146,7 @@ void Builtins::Generate_CallOrConstructVarargs(MacroAssembler* masm, __ cmp(eax, kArgumentsLength); __ j(equal, &done, Label::kNear); // Turn the hole into undefined as we go. - __ mov(edi, FieldOperand(kArgumentsList, eax, times_system_pointer_size, + __ mov(edi, FieldOperand(kArgumentsList, eax, times_tagged_size, FixedArray::kHeaderSize)); __ CompareRoot(edi, RootIndex::kTheHoleValue); __ j(not_equal, &push, Label::kNear); @@ -1977,6 +2158,7 @@ void Builtins::Generate_CallOrConstructVarargs(MacroAssembler* masm, __ bind(&done); __ PushReturnAddressFrom(edx); } +#endif // !V8_REVERSE_JSARGS // Restore eax, edi and edx. __ movd(esi, xmm3); // Restore the context. @@ -2203,7 +2385,6 @@ void Generate_PushBoundArguments(MacroAssembler* masm) { // -- edx : new.target (only in case of [[Construct]]) // -- edi : target (checked to be a JSBoundFunction) // ----------------------------------- - __ movd(xmm0, edx); // Spill edx. // Load [[BoundArguments]] into ecx and length of that into edx. @@ -2213,6 +2394,67 @@ void Generate_PushBoundArguments(MacroAssembler* masm) { __ SmiUntag(edx); __ test(edx, edx); __ j(zero, &no_bound_arguments); +#ifdef V8_REVERSE_JSARGS + { + // ----------- S t a t e ------------- + // -- eax : the number of arguments (not including the receiver) + // -- xmm0 : new.target (only in case of [[Construct]]) + // -- edi : target (checked to be a JSBoundFunction) + // -- ecx : the [[BoundArguments]] (implemented as FixedArray) + // -- edx : the number of [[BoundArguments]] + // ----------------------------------- + + // Check the stack for overflow. + { + Label done, stack_overflow; + Generate_StackOverflowCheck(masm, edx, ecx, &stack_overflow); + __ jmp(&done); + __ bind(&stack_overflow); + { + FrameScope frame(masm, StackFrame::MANUAL); + __ CallRuntime(Runtime::kThrowStackOverflow); + __ int3(); + } + __ bind(&done); + } + + // Spill context. + __ movd(xmm3, esi); + + // Save Return Adress and Receiver into registers. + __ pop(esi); + __ movd(xmm1, esi); + __ pop(esi); + __ movd(xmm2, esi); + + // Push [[BoundArguments]] to the stack. + { + Label loop; + __ mov(ecx, FieldOperand(edi, JSBoundFunction::kBoundArgumentsOffset)); + __ mov(edx, FieldOperand(ecx, FixedArray::kLengthOffset)); + __ SmiUntag(edx); + // Adjust effective number of arguments (eax contains the number of + // arguments from the call not including receiver plus the number of + // [[BoundArguments]]). + __ add(eax, edx); + __ bind(&loop); + __ dec(edx); + __ mov(esi, FieldOperand(ecx, edx, times_tagged_size, + FixedArray::kHeaderSize)); + __ push(esi); + __ j(greater, &loop); + } + + // Restore Receiver and Return Address. + __ movd(esi, xmm2); + __ push(esi); + __ movd(esi, xmm1); + __ push(esi); + + // Restore context. + __ movd(esi, xmm3); + } +#else // !V8_REVERSE_JSARGS { // ----------- S t a t e ------------- // -- eax : the number of arguments (not including the receiver) @@ -2241,7 +2483,6 @@ void Generate_PushBoundArguments(MacroAssembler* masm) { } __ bind(&done); } - #if V8_OS_WIN // Correctly allocate the stack space that was checked above. { @@ -2291,6 +2532,7 @@ void Generate_PushBoundArguments(MacroAssembler* masm) { // [[BoundArguments]]), so we need to subtract one for the return address. __ dec(eax); } +#endif // !V8_REVERSE_JSARGS __ bind(&no_bound_arguments); __ movd(edx, xmm0); // Reload edx. @@ -2518,7 +2760,11 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { // Copy receiver and all expected arguments. const int offset = StandardFrameConstants::kCallerSPOffset; +#ifdef V8_REVERSE_JSARGS + __ lea(edi, Operand(ebp, ecx, times_system_pointer_size, offset)); +#else __ lea(edi, Operand(ebp, eax, times_system_pointer_size, offset)); +#endif __ mov(eax, -1); // account for receiver Label copy; @@ -2543,6 +2789,35 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { // Remember expected arguments in xmm0. __ movd(xmm0, kExpectedNumberOfArgumentsRegister); +#ifdef V8_REVERSE_JSARGS + // Remember new target. + __ movd(xmm1, edx); + + // Fill remaining expected arguments with undefined values. + Label fill; + __ mov(edx, ecx); + __ sub(edx, eax); + __ bind(&fill); + __ Push(Immediate(masm->isolate()->factory()->undefined_value())); + __ dec(edx); + __ j(greater, &fill); + + // Copy receiver and all actual arguments. + const int offset = StandardFrameConstants::kCallerSPOffset; + __ lea(edi, Operand(ebp, eax, times_system_pointer_size, offset)); + __ mov(edx, Immediate(-1)); + + Label copy; + __ bind(©); + __ inc(edx); + __ push(Operand(edi, 0)); + __ sub(edi, Immediate(kSystemPointerSize)); + __ cmp(edx, eax); + __ j(less, ©); + + // Restore new.target + __ movd(edx, xmm1); +#else // !V8_REVERSE_JSARGS // Copy receiver and all actual arguments. const int offset = StandardFrameConstants::kCallerSPOffset; __ lea(edi, Operand(ebp, eax, times_system_pointer_size, offset)); @@ -2567,6 +2842,7 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { __ Push(Immediate(masm->isolate()->factory()->undefined_value())); __ cmp(eax, kExpectedNumberOfArgumentsRegister); __ j(less, &fill); +#endif // !V8_REVERSE_JSARGS // Restore expected arguments. __ movd(eax, xmm0); @@ -3153,6 +3429,7 @@ void Builtins::Generate_CallApiCallback(MacroAssembler* masm) { // -- esp[argc * 4] : first argument // -- esp[(argc + 1) * 4] : receiver // ----------------------------------- + // NOTE: The order of args are reversed if V8_REVERSE_JSARGS Register api_function_address = edx; Register argc = ecx; @@ -3222,8 +3499,13 @@ void Builtins::Generate_CallApiCallback(MacroAssembler* masm) { // FunctionCallbackInfo::values_ (points at the first varargs argument passed // on the stack). +#ifdef V8_REVERSE_JSARGS + __ lea(scratch, + Operand(scratch, (FCA::kArgsLength + 1) * kSystemPointerSize)); +#else __ lea(scratch, Operand(scratch, argc, times_system_pointer_size, (FCA::kArgsLength - 1) * kSystemPointerSize)); +#endif __ mov(ApiParameterOperand(kApiArgc + 1), scratch); // FunctionCallbackInfo::length_. |