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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_ARM64 | 7 #if V8_TARGET_ARCH_ARM64 |
8 | 8 |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/debug.h" | 10 #include "src/debug.h" |
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699 void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { | 699 void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
700 Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new); | 700 Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new); |
701 } | 701 } |
702 | 702 |
703 | 703 |
704 void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { | 704 void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
705 Generate_JSConstructStubHelper(masm, true, false); | 705 Generate_JSConstructStubHelper(masm, true, false); |
706 } | 706 } |
707 | 707 |
708 | 708 |
| 709 void Builtins::Generate_JSConstructStubForDerived(MacroAssembler* masm) { |
| 710 // ----------- S t a t e ------------- |
| 711 // -- x0 : number of arguments |
| 712 // -- x1 : constructor function |
| 713 // -- x2 : allocation site or undefined |
| 714 // -- x3 : original constructor |
| 715 // -- lr : return address |
| 716 // -- sp[...]: constructor arguments |
| 717 // ----------------------------------- |
| 718 ASM_LOCATION("Builtins::Generate_JSConstructStubForDerived"); |
| 719 |
| 720 // TODO(dslomov): support pretenuring |
| 721 CHECK(!FLAG_pretenuring_call_new); |
| 722 |
| 723 { |
| 724 FrameScope frame_scope(masm, StackFrame::CONSTRUCT); |
| 725 __ Mov(x4, x0); |
| 726 __ SmiTag(x4); |
| 727 __ LoadRoot(x10, Heap::kTheHoleValueRootIndex); |
| 728 __ Push(x4, x10); |
| 729 // sp[0]: number of arguments |
| 730 // sp[1]: receiver (the hole) |
| 731 |
| 732 |
| 733 // Set up pointer to last argument. |
| 734 __ Add(x2, fp, StandardFrameConstants::kCallerSPOffset); |
| 735 |
| 736 // Copy arguments and receiver to the expression stack. |
| 737 // Copy 2 values every loop to use ldp/stp. |
| 738 // x0: number of arguments |
| 739 // x1: constructor function |
| 740 // x2: address of last argument (caller sp) |
| 741 // jssp[0]: receiver |
| 742 // jssp[1]: number of arguments (smi-tagged) |
| 743 // Compute the start address of the copy in x4. |
| 744 __ Add(x4, x2, Operand(x0, LSL, kPointerSizeLog2)); |
| 745 Label loop, entry, done_copying_arguments; |
| 746 __ B(&entry); |
| 747 __ Bind(&loop); |
| 748 __ Ldp(x10, x11, MemOperand(x4, -2 * kPointerSize, PreIndex)); |
| 749 __ Push(x11, x10); |
| 750 __ Bind(&entry); |
| 751 __ Cmp(x4, x2); |
| 752 __ B(gt, &loop); |
| 753 // Because we copied values 2 by 2 we may have copied one extra value. |
| 754 // Drop it if that is the case. |
| 755 __ B(eq, &done_copying_arguments); |
| 756 __ Drop(1); |
| 757 __ Bind(&done_copying_arguments); |
| 758 |
| 759 // Call the function. |
| 760 // x0: number of arguments |
| 761 // x1: constructor function |
| 762 ParameterCount actual(x0); |
| 763 __ InvokeFunction(x1, actual, CALL_FUNCTION, NullCallWrapper()); |
| 764 |
| 765 |
| 766 // Restore the context from the frame. |
| 767 // x0: result |
| 768 // jssp[0]: number of arguments (smi-tagged) |
| 769 __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 770 |
| 771 // Load number of arguments (smi). |
| 772 __ Peek(x1, 0); |
| 773 |
| 774 // Leave construct frame |
| 775 } |
| 776 |
| 777 __ DropBySMI(x1); |
| 778 __ Drop(1); |
| 779 __ Ret(); |
| 780 } |
| 781 |
| 782 |
709 // Input: | 783 // Input: |
710 // x0: code entry. | 784 // x0: code entry. |
711 // x1: function. | 785 // x1: function. |
712 // x2: receiver. | 786 // x2: receiver. |
713 // x3: argc. | 787 // x3: argc. |
714 // x4: argv. | 788 // x4: argv. |
715 // Output: | 789 // Output: |
716 // x0: result. | 790 // x0: result. |
717 static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, | 791 static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
718 bool is_construct) { | 792 bool is_construct) { |
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1576 __ Unreachable(); | 1650 __ Unreachable(); |
1577 } | 1651 } |
1578 } | 1652 } |
1579 | 1653 |
1580 | 1654 |
1581 #undef __ | 1655 #undef __ |
1582 | 1656 |
1583 } } // namespace v8::internal | 1657 } } // namespace v8::internal |
1584 | 1658 |
1585 #endif // V8_TARGET_ARCH_ARM | 1659 #endif // V8_TARGET_ARCH_ARM |
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