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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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1616 | 1616 |
1617 if (argc == 0) { | 1617 if (argc == 0) { |
1618 // Nothing to do, just return the length. | 1618 // Nothing to do, just return the length. |
1619 __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); | 1619 __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
1620 __ Drop(argc + 1); | 1620 __ Drop(argc + 1); |
1621 __ Ret(); | 1621 __ Ret(); |
1622 } else { | 1622 } else { |
1623 Label call_builtin; | 1623 Label call_builtin; |
1624 | 1624 |
1625 if (argc == 1) { // Otherwise fall through to call the builtin. | 1625 if (argc == 1) { // Otherwise fall through to call the builtin. |
1626 Label attempt_to_grow_elements; | 1626 Label attempt_to_grow_elements, with_write_barrier, check_double; |
1627 | 1627 |
1628 Register elements = r6; | 1628 Register elements = r6; |
1629 Register end_elements = r5; | 1629 Register end_elements = r5; |
1630 // Get the elements array of the object. | 1630 // Get the elements array of the object. |
1631 __ ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset)); | 1631 __ ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset)); |
1632 | 1632 |
1633 // Check that the elements are in fast mode and writable. | 1633 // Check that the elements are in fast mode and writable. |
1634 __ CheckMap(elements, | 1634 __ CheckMap(elements, |
1635 r0, | 1635 r0, |
1636 Heap::kFixedArrayMapRootIndex, | 1636 Heap::kFixedArrayMapRootIndex, |
1637 &call_builtin, | 1637 &check_double, |
1638 DONT_DO_SMI_CHECK); | 1638 DONT_DO_SMI_CHECK); |
1639 | 1639 |
1640 | |
1641 // Get the array's length into r0 and calculate new length. | 1640 // Get the array's length into r0 and calculate new length. |
1642 __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); | 1641 __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
1643 STATIC_ASSERT(kSmiTagSize == 1); | 1642 STATIC_ASSERT(kSmiTagSize == 1); |
1644 STATIC_ASSERT(kSmiTag == 0); | 1643 STATIC_ASSERT(kSmiTag == 0); |
1645 __ add(r0, r0, Operand(Smi::FromInt(argc))); | 1644 __ add(r0, r0, Operand(Smi::FromInt(argc))); |
1646 | 1645 |
1647 // Get the elements' length. | 1646 // Get the elements' length. |
1648 __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset)); | 1647 __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
1649 | 1648 |
1650 // Check if we could survive without allocation. | 1649 // Check if we could survive without allocation. |
1651 __ cmp(r0, r4); | 1650 __ cmp(r0, r4); |
1652 __ b(gt, &attempt_to_grow_elements); | 1651 __ b(gt, &attempt_to_grow_elements); |
1653 | 1652 |
1654 // Check if value is a smi. | 1653 // Check if value is a smi. |
1655 Label with_write_barrier; | |
1656 __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize)); | 1654 __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize)); |
1657 __ JumpIfNotSmi(r4, &with_write_barrier); | 1655 __ JumpIfNotSmi(r4, &with_write_barrier); |
1658 | 1656 |
1659 // Save new length. | 1657 // Save new length. |
1660 __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); | 1658 __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
1661 | 1659 |
1662 // Store the value. | 1660 // Store the value. |
1663 // We may need a register containing the address end_elements below, | 1661 // We may need a register containing the address end_elements below, |
1664 // so write back the value in end_elements. | 1662 // so write back the value in end_elements. |
1665 __ add(end_elements, elements, | 1663 __ add(end_elements, elements, |
1666 Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); | 1664 Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
1667 const int kEndElementsOffset = | 1665 const int kEndElementsOffset = |
1668 FixedArray::kHeaderSize - kHeapObjectTag - argc * kPointerSize; | 1666 FixedArray::kHeaderSize - kHeapObjectTag - argc * kPointerSize; |
1669 __ str(r4, MemOperand(end_elements, kEndElementsOffset, PreIndex)); | 1667 __ str(r4, MemOperand(end_elements, kEndElementsOffset, PreIndex)); |
1670 | 1668 |
1671 // Check for a smi. | 1669 // Check for a smi. |
1672 __ Drop(argc + 1); | 1670 __ Drop(argc + 1); |
1673 __ Ret(); | 1671 __ Ret(); |
1674 | 1672 |
| 1673 __ bind(&check_double); |
| 1674 |
| 1675 // Check that the elements are in fast mode and writable. |
| 1676 __ CheckMap(elements, |
| 1677 r0, |
| 1678 Heap::kFixedDoubleArrayMapRootIndex, |
| 1679 &call_builtin, |
| 1680 DONT_DO_SMI_CHECK); |
| 1681 |
| 1682 // Get the array's length into r0 and calculate new length. |
| 1683 __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 1684 STATIC_ASSERT(kSmiTagSize == 1); |
| 1685 STATIC_ASSERT(kSmiTag == 0); |
| 1686 __ add(r0, r0, Operand(Smi::FromInt(argc))); |
| 1687 |
| 1688 // Get the elements' length. |
| 1689 __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 1690 |
| 1691 // Check if we could survive without allocation. |
| 1692 __ cmp(r0, r4); |
| 1693 __ b(gt, &call_builtin); |
| 1694 |
| 1695 __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize)); |
| 1696 __ StoreNumberToDoubleElements( |
| 1697 r4, r0, elements, r3, r5, r2, r9, |
| 1698 &call_builtin, argc * kDoubleSize); |
| 1699 |
| 1700 // Save new length. |
| 1701 __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 1702 |
| 1703 // Check for a smi. |
| 1704 __ Drop(argc + 1); |
| 1705 __ Ret(); |
| 1706 |
1675 __ bind(&with_write_barrier); | 1707 __ bind(&with_write_barrier); |
1676 | 1708 |
1677 __ ldr(r3, FieldMemOperand(receiver, HeapObject::kMapOffset)); | 1709 __ ldr(r3, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
1678 | 1710 |
1679 if (FLAG_smi_only_arrays && !FLAG_trace_elements_transitions) { | 1711 if (FLAG_smi_only_arrays && !FLAG_trace_elements_transitions) { |
1680 Label fast_object, not_fast_object; | 1712 Label fast_object, not_fast_object; |
1681 __ CheckFastObjectElements(r3, r7, ¬_fast_object); | 1713 __ CheckFastObjectElements(r3, r7, ¬_fast_object); |
1682 __ jmp(&fast_object); | 1714 __ jmp(&fast_object); |
1683 // In case of fast smi-only, convert to fast object, otherwise bail out. | 1715 // In case of fast smi-only, convert to fast object, otherwise bail out. |
1684 __ bind(¬_fast_object); | 1716 __ bind(¬_fast_object); |
1685 __ CheckFastSmiElements(r3, r7, &call_builtin); | 1717 __ CheckFastSmiElements(r3, r7, &call_builtin); |
| 1718 |
| 1719 __ ldr(r7, FieldMemOperand(r4, HeapObject::kMapOffset)); |
| 1720 __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| 1721 __ cmp(r7, ip); |
| 1722 __ b(eq, &call_builtin); |
1686 // edx: receiver | 1723 // edx: receiver |
1687 // r3: map | 1724 // r3: map |
1688 Label try_holey_map; | 1725 Label try_holey_map; |
1689 __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS, | 1726 __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS, |
1690 FAST_ELEMENTS, | 1727 FAST_ELEMENTS, |
1691 r3, | 1728 r3, |
1692 r7, | 1729 r7, |
1693 &try_holey_map); | 1730 &try_holey_map); |
1694 __ mov(r2, receiver); | 1731 __ mov(r2, receiver); |
1695 ElementsTransitionGenerator:: | 1732 ElementsTransitionGenerator:: |
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4691 __ cmp(key_reg, scratch1); | 4728 __ cmp(key_reg, scratch1); |
4692 if (grow_mode == ALLOW_JSARRAY_GROWTH) { | 4729 if (grow_mode == ALLOW_JSARRAY_GROWTH) { |
4693 __ b(hs, &grow); | 4730 __ b(hs, &grow); |
4694 } else { | 4731 } else { |
4695 __ b(hs, &miss_force_generic); | 4732 __ b(hs, &miss_force_generic); |
4696 } | 4733 } |
4697 | 4734 |
4698 __ bind(&finish_store); | 4735 __ bind(&finish_store); |
4699 __ StoreNumberToDoubleElements(value_reg, | 4736 __ StoreNumberToDoubleElements(value_reg, |
4700 key_reg, | 4737 key_reg, |
4701 receiver_reg, | |
4702 // All registers after this are overwritten. | 4738 // All registers after this are overwritten. |
4703 elements_reg, | 4739 elements_reg, |
4704 scratch1, | 4740 scratch1, |
4705 scratch2, | 4741 scratch2, |
4706 scratch3, | 4742 scratch3, |
4707 scratch4, | 4743 scratch4, |
4708 &transition_elements_kind); | 4744 &transition_elements_kind); |
4709 __ Ret(); | 4745 __ Ret(); |
4710 | 4746 |
4711 // Handle store cache miss, replacing the ic with the generic stub. | 4747 // Handle store cache miss, replacing the ic with the generic stub. |
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4787 __ Jump(ic_slow, RelocInfo::CODE_TARGET); | 4823 __ Jump(ic_slow, RelocInfo::CODE_TARGET); |
4788 } | 4824 } |
4789 } | 4825 } |
4790 | 4826 |
4791 | 4827 |
4792 #undef __ | 4828 #undef __ |
4793 | 4829 |
4794 } } // namespace v8::internal | 4830 } } // namespace v8::internal |
4795 | 4831 |
4796 #endif // V8_TARGET_ARCH_ARM | 4832 #endif // V8_TARGET_ARCH_ARM |
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