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Issue 12413026: MIPS: Allow direct allocation in old pointer space. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 9 months ago
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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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3823 // Check for the empty array, and preallocate a small backing store if 3823 // Check for the empty array, and preallocate a small backing store if
3824 // possible. 3824 // possible.
3825 __ lw(length_reg, 3825 __ lw(length_reg,
3826 FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); 3826 FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
3827 __ lw(elements_reg, 3827 __ lw(elements_reg,
3828 FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); 3828 FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
3829 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); 3829 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
3830 __ Branch(&check_capacity, ne, elements_reg, Operand(at)); 3830 __ Branch(&check_capacity, ne, elements_reg, Operand(at));
3831 3831
3832 int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); 3832 int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements);
3833 __ AllocateInNewSpace(size, elements_reg, scratch, scratch2, &slow, 3833 __ Allocate(size, elements_reg, scratch, scratch2, &slow, TAG_OBJECT);
3834 TAG_OBJECT);
3835 3834
3836 __ LoadRoot(scratch, Heap::kFixedArrayMapRootIndex); 3835 __ LoadRoot(scratch, Heap::kFixedArrayMapRootIndex);
3837 __ sw(scratch, FieldMemOperand(elements_reg, JSObject::kMapOffset)); 3836 __ sw(scratch, FieldMemOperand(elements_reg, JSObject::kMapOffset));
3838 __ li(scratch, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements))); 3837 __ li(scratch, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
3839 __ sw(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset)); 3838 __ sw(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset));
3840 __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex); 3839 __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
3841 for (int i = 1; i < JSArray::kPreallocatedArrayElements; ++i) { 3840 for (int i = 1; i < JSArray::kPreallocatedArrayElements; ++i) {
3842 __ sw(scratch, FieldMemOperand(elements_reg, FixedArray::SizeFor(i))); 3841 __ sw(scratch, FieldMemOperand(elements_reg, FixedArray::SizeFor(i)));
3843 } 3842 }
3844 3843
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3974 // Check for the empty array, and preallocate a small backing store if 3973 // Check for the empty array, and preallocate a small backing store if
3975 // possible. 3974 // possible.
3976 __ lw(length_reg, 3975 __ lw(length_reg,
3977 FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); 3976 FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
3978 __ lw(elements_reg, 3977 __ lw(elements_reg,
3979 FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); 3978 FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
3980 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); 3979 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
3981 __ Branch(&check_capacity, ne, elements_reg, Operand(at)); 3980 __ Branch(&check_capacity, ne, elements_reg, Operand(at));
3982 3981
3983 int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements); 3982 int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements);
3984 __ AllocateInNewSpace(size, elements_reg, scratch1, scratch2, &slow, 3983 __ Allocate(size, elements_reg, scratch1, scratch2, &slow, TAG_OBJECT);
3985 TAG_OBJECT);
3986 3984
3987 // Initialize the new FixedDoubleArray. 3985 // Initialize the new FixedDoubleArray.
3988 __ LoadRoot(scratch1, Heap::kFixedDoubleArrayMapRootIndex); 3986 __ LoadRoot(scratch1, Heap::kFixedDoubleArrayMapRootIndex);
3989 __ sw(scratch1, FieldMemOperand(elements_reg, JSObject::kMapOffset)); 3987 __ sw(scratch1, FieldMemOperand(elements_reg, JSObject::kMapOffset));
3990 __ li(scratch1, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements))); 3988 __ li(scratch1, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
3991 __ sw(scratch1, 3989 __ sw(scratch1,
3992 FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset)); 3990 FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset));
3993 3991
3994 __ mov(scratch1, elements_reg); 3992 __ mov(scratch1, elements_reg);
3995 __ StoreNumberToDoubleElements(value_reg, 3993 __ StoreNumberToDoubleElements(value_reg,
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4039 TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow); 4037 TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
4040 } 4038 }
4041 } 4039 }
4042 4040
4043 4041
4044 #undef __ 4042 #undef __
4045 4043
4046 } } // namespace v8::internal 4044 } } // namespace v8::internal
4047 4045
4048 #endif // V8_TARGET_ARCH_MIPS 4046 #endif // V8_TARGET_ARCH_MIPS
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