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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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 #if V8_TARGET_ARCH_S390 | 5 #if V8_TARGET_ARCH_S390 |
6 | 6 |
7 #include "src/codegen.h" | 7 #include "src/codegen.h" |
8 #include "src/debug/debug.h" | 8 #include "src/debug/debug.h" |
9 #include "src/deoptimizer.h" | 9 #include "src/deoptimizer.h" |
10 #include "src/full-codegen/full-codegen.h" | 10 #include "src/full-codegen/full-codegen.h" |
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744 // -- lr : return address | 744 // -- lr : return address |
745 // -- sp[0] : generator receiver | 745 // -- sp[0] : generator receiver |
746 // ----------------------------------- | 746 // ----------------------------------- |
747 | 747 |
748 // Push holes for arguments to generator function. Since the parser forced | 748 // Push holes for arguments to generator function. Since the parser forced |
749 // context allocation for any variables in generators, the actual argument | 749 // context allocation for any variables in generators, the actual argument |
750 // values have already been copied into the context and these dummy values | 750 // values have already been copied into the context and these dummy values |
751 // will never be used. | 751 // will never be used. |
752 __ LoadP(r5, FieldMemOperand(r6, JSFunction::kSharedFunctionInfoOffset)); | 752 __ LoadP(r5, FieldMemOperand(r6, JSFunction::kSharedFunctionInfoOffset)); |
753 __ LoadW( | 753 __ LoadW( |
754 r5, FieldMemOperand(r5, SharedFunctionInfo::kFormalParameterCountOffset)); | 754 r2, FieldMemOperand(r5, SharedFunctionInfo::kFormalParameterCountOffset)); |
755 { | 755 { |
756 Label loop, done_loop; | 756 Label loop, done_loop; |
757 __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); | 757 __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
758 #if V8_TARGET_ARCH_S390X | 758 #if V8_TARGET_ARCH_S390X |
759 __ CmpP(r5, Operand::Zero()); | 759 __ CmpP(r2, Operand::Zero()); |
760 __ beq(&done_loop); | 760 __ beq(&done_loop); |
761 #else | 761 #else |
762 __ SmiUntag(r5); | 762 __ SmiUntag(r2); |
763 __ LoadAndTestP(r5, r5); | 763 __ LoadAndTestP(r2, r2); |
764 __ beq(&done_loop); | 764 __ beq(&done_loop); |
765 #endif | 765 #endif |
766 __ LoadRR(r1, r5); | 766 __ LoadRR(r1, r2); |
767 __ bind(&loop); | 767 __ bind(&loop); |
768 __ push(ip); | 768 __ push(ip); |
769 __ BranchOnCount(r1, &loop); | 769 __ BranchOnCount(r1, &loop); |
770 __ bind(&done_loop); | 770 __ bind(&done_loop); |
771 } | 771 } |
772 | 772 |
773 // Enter a new JavaScript frame, and initialize its slots as they were when | 773 // Dispatch on the kind of generator object. |
774 // the generator was suspended. | 774 Label old_generator; |
775 FrameScope scope(masm, StackFrame::MANUAL); | 775 __ LoadP(r5, FieldMemOperand(r5, SharedFunctionInfo::kFunctionDataOffset)); |
776 __ PushStandardFrame(r6); | 776 __ CompareObjectType(r5, r5, r5, BYTECODE_ARRAY_TYPE); |
| 777 __ bne(&old_generator, Label::kNear); |
777 | 778 |
778 // Restore the operand stack. | 779 // New-style (ignition/turbofan) generator object |
779 __ LoadP(r2, FieldMemOperand(r3, JSGeneratorObject::kOperandStackOffset)); | |
780 __ LoadP(r5, FieldMemOperand(r2, FixedArray::kLengthOffset)); | |
781 __ AddP(r2, r2, | |
782 Operand(FixedArray::kHeaderSize - kHeapObjectTag - kPointerSize)); | |
783 { | 780 { |
784 Label loop, done_loop; | 781 // We abuse new.target both to indicate that this is a resume call and to |
785 __ SmiUntag(r5); | 782 // pass in the generator object. In ordinary calls, new.target is always |
786 __ LoadAndTestP(r5, r5); | 783 // undefined because generator functions are non-constructable. |
787 __ beq(&done_loop); | 784 __ LoadRR(r5, r3); |
788 __ LoadRR(r1, r5); | 785 __ LoadRR(r3, r6); |
789 __ bind(&loop); | 786 __ LoadP(ip, FieldMemOperand(r3, JSFunction::kCodeEntryOffset)); |
790 __ LoadP(ip, MemOperand(r2, kPointerSize)); | 787 __ JumpToJSEntry(ip); |
791 __ la(r2, MemOperand(r2, kPointerSize)); | |
792 __ Push(ip); | |
793 __ BranchOnCount(r1, &loop); | |
794 __ bind(&done_loop); | |
795 } | 788 } |
| 789 // Old-style (full-codegen) generator object |
| 790 __ bind(&old_generator); |
| 791 { |
| 792 // Enter a new JavaScript frame, and initialize its slots as they were when |
| 793 // the generator was suspended. |
| 794 FrameScope scope(masm, StackFrame::MANUAL); |
| 795 __ PushStandardFrame(r6); |
796 | 796 |
797 // Reset operand stack so we don't leak. | 797 // Restore the operand stack. |
798 __ LoadRoot(ip, Heap::kEmptyFixedArrayRootIndex); | 798 __ LoadP(r2, FieldMemOperand(r3, JSGeneratorObject::kOperandStackOffset)); |
799 __ StoreP(ip, FieldMemOperand(r3, JSGeneratorObject::kOperandStackOffset), | 799 __ LoadP(r5, FieldMemOperand(r2, FixedArray::kLengthOffset)); |
800 r0); | 800 __ AddP(r2, r2, |
| 801 Operand(FixedArray::kHeaderSize - kHeapObjectTag - kPointerSize)); |
| 802 { |
| 803 Label loop, done_loop; |
| 804 __ SmiUntag(r5); |
| 805 __ LoadAndTestP(r5, r5); |
| 806 __ beq(&done_loop); |
| 807 __ LoadRR(r1, r5); |
| 808 __ bind(&loop); |
| 809 __ LoadP(ip, MemOperand(r2, kPointerSize)); |
| 810 __ la(r2, MemOperand(r2, kPointerSize)); |
| 811 __ Push(ip); |
| 812 __ BranchOnCount(r1, &loop); |
| 813 __ bind(&done_loop); |
| 814 } |
801 | 815 |
802 // Resume the generator function at the continuation. | 816 // Reset operand stack so we don't leak. |
803 __ LoadP(r5, FieldMemOperand(r6, JSFunction::kSharedFunctionInfoOffset)); | 817 __ LoadRoot(ip, Heap::kEmptyFixedArrayRootIndex); |
804 __ LoadP(r5, FieldMemOperand(r5, SharedFunctionInfo::kCodeOffset)); | 818 __ StoreP(ip, FieldMemOperand(r3, JSGeneratorObject::kOperandStackOffset), |
805 __ AddP(r5, r5, Operand(Code::kHeaderSize - kHeapObjectTag)); | |
806 { | |
807 ConstantPoolUnavailableScope constant_pool_unavailable(masm); | |
808 __ LoadP(r4, FieldMemOperand(r3, JSGeneratorObject::kContinuationOffset)); | |
809 __ SmiUntag(r4); | |
810 __ AddP(r5, r5, r4); | |
811 __ LoadSmiLiteral(r4, Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)); | |
812 __ StoreP(r4, FieldMemOperand(r3, JSGeneratorObject::kContinuationOffset), | |
813 r0); | 819 r0); |
814 __ LoadRR(r2, r3); // Continuation expects generator object in r2. | 820 |
815 __ Jump(r5); | 821 // Resume the generator function at the continuation. |
| 822 __ LoadP(r5, FieldMemOperand(r6, JSFunction::kSharedFunctionInfoOffset)); |
| 823 __ LoadP(r5, FieldMemOperand(r5, SharedFunctionInfo::kCodeOffset)); |
| 824 __ AddP(r5, r5, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 825 { |
| 826 ConstantPoolUnavailableScope constant_pool_unavailable(masm); |
| 827 __ LoadP(r4, FieldMemOperand(r3, JSGeneratorObject::kContinuationOffset)); |
| 828 __ SmiUntag(r4); |
| 829 __ AddP(r5, r5, r4); |
| 830 __ LoadSmiLiteral(r4, |
| 831 Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)); |
| 832 __ StoreP(r4, FieldMemOperand(r3, JSGeneratorObject::kContinuationOffset), |
| 833 r0); |
| 834 __ LoadRR(r2, r3); // Continuation expects generator object in r2. |
| 835 __ Jump(r5); |
| 836 } |
816 } | 837 } |
817 } | 838 } |
818 | 839 |
819 void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) { | 840 void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) { |
820 FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); | 841 FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
821 __ push(r3); | 842 __ push(r3); |
822 __ CallRuntime(Runtime::kThrowConstructedNonConstructable); | 843 __ CallRuntime(Runtime::kThrowConstructedNonConstructable); |
823 } | 844 } |
824 | 845 |
825 enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt }; | 846 enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt }; |
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2797 __ bkpt(0); | 2818 __ bkpt(0); |
2798 } | 2819 } |
2799 } | 2820 } |
2800 | 2821 |
2801 #undef __ | 2822 #undef __ |
2802 | 2823 |
2803 } // namespace internal | 2824 } // namespace internal |
2804 } // namespace v8 | 2825 } // namespace v8 |
2805 | 2826 |
2806 #endif // V8_TARGET_ARCH_S390 | 2827 #endif // V8_TARGET_ARCH_S390 |
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