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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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| 2978   // Now allocate the JSObject in new space. | 2978   // Now allocate the JSObject in new space. | 
| 2979   // rbx: initial map | 2979   // rbx: initial map | 
| 2980   ASSERT(function->has_initial_map()); | 2980   ASSERT(function->has_initial_map()); | 
| 2981   int instance_size = function->initial_map()->instance_size(); | 2981   int instance_size = function->initial_map()->instance_size(); | 
| 2982 #ifdef DEBUG | 2982 #ifdef DEBUG | 
| 2983   __ movzxbq(rcx, FieldOperand(rbx, Map::kInstanceSizeOffset)); | 2983   __ movzxbq(rcx, FieldOperand(rbx, Map::kInstanceSizeOffset)); | 
| 2984   __ shl(rcx, Immediate(kPointerSizeLog2)); | 2984   __ shl(rcx, Immediate(kPointerSizeLog2)); | 
| 2985   __ cmpq(rcx, Immediate(instance_size)); | 2985   __ cmpq(rcx, Immediate(instance_size)); | 
| 2986   __ Check(equal, "Instance size of initial map changed."); | 2986   __ Check(equal, "Instance size of initial map changed."); | 
| 2987 #endif | 2987 #endif | 
| 2988   __ AllocateInNewSpace(instance_size, rdx, rcx, no_reg, | 2988   __ Allocate(instance_size, rdx, rcx, no_reg, &generic_stub_call, | 
| 2989                         &generic_stub_call, NO_ALLOCATION_FLAGS); | 2989               NO_ALLOCATION_FLAGS); | 
| 2990 | 2990 | 
| 2991   // Allocated the JSObject, now initialize the fields and add the heap tag. | 2991   // Allocated the JSObject, now initialize the fields and add the heap tag. | 
| 2992   // rbx: initial map | 2992   // rbx: initial map | 
| 2993   // rdx: JSObject (untagged) | 2993   // rdx: JSObject (untagged) | 
| 2994   __ movq(Operand(rdx, JSObject::kMapOffset), rbx); | 2994   __ movq(Operand(rdx, JSObject::kMapOffset), rbx); | 
| 2995   __ Move(rbx, factory()->empty_fixed_array()); | 2995   __ Move(rbx, factory()->empty_fixed_array()); | 
| 2996   __ movq(Operand(rdx, JSObject::kPropertiesOffset), rbx); | 2996   __ movq(Operand(rdx, JSObject::kPropertiesOffset), rbx); | 
| 2997   __ movq(Operand(rdx, JSObject::kElementsOffset), rbx); | 2997   __ movq(Operand(rdx, JSObject::kElementsOffset), rbx); | 
| 2998 | 2998 | 
| 2999   // rax: argc | 2999   // rax: argc | 
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| 3413     // compare. | 3413     // compare. | 
| 3414     __ j(not_equal, &miss_force_generic); | 3414     __ j(not_equal, &miss_force_generic); | 
| 3415 | 3415 | 
| 3416     // Check for the empty array, and preallocate a small backing store if | 3416     // Check for the empty array, and preallocate a small backing store if | 
| 3417     // possible. | 3417     // possible. | 
| 3418     __ movq(rdi, FieldOperand(rdx, JSObject::kElementsOffset)); | 3418     __ movq(rdi, FieldOperand(rdx, JSObject::kElementsOffset)); | 
| 3419     __ CompareRoot(rdi, Heap::kEmptyFixedArrayRootIndex); | 3419     __ CompareRoot(rdi, Heap::kEmptyFixedArrayRootIndex); | 
| 3420     __ j(not_equal, &check_capacity); | 3420     __ j(not_equal, &check_capacity); | 
| 3421 | 3421 | 
| 3422     int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); | 3422     int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); | 
| 3423     __ AllocateInNewSpace(size, rdi, rbx, r8, &slow, TAG_OBJECT); | 3423     __ Allocate(size, rdi, rbx, r8, &slow, TAG_OBJECT); | 
| 3424 | 3424 | 
| 3425     // rax: value | 3425     // rax: value | 
| 3426     // rcx: key | 3426     // rcx: key | 
| 3427     // rdx: receiver | 3427     // rdx: receiver | 
| 3428     // rdi: elements | 3428     // rdi: elements | 
| 3429     // Make sure that the backing store can hold additional elements. | 3429     // Make sure that the backing store can hold additional elements. | 
| 3430     __ Move(FieldOperand(rdi, JSObject::kMapOffset), | 3430     __ Move(FieldOperand(rdi, JSObject::kMapOffset), | 
| 3431             masm->isolate()->factory()->fixed_array_map()); | 3431             masm->isolate()->factory()->fixed_array_map()); | 
| 3432     __ Move(FieldOperand(rdi, FixedArray::kLengthOffset), | 3432     __ Move(FieldOperand(rdi, FixedArray::kLengthOffset), | 
| 3433             Smi::FromInt(JSArray::kPreallocatedArrayElements)); | 3433             Smi::FromInt(JSArray::kPreallocatedArrayElements)); | 
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| 3547     __ j(not_equal, &transition_elements_kind); | 3547     __ j(not_equal, &transition_elements_kind); | 
| 3548     __ bind(&value_is_smi); | 3548     __ bind(&value_is_smi); | 
| 3549 | 3549 | 
| 3550     // Check for the empty array, and preallocate a small backing store if | 3550     // Check for the empty array, and preallocate a small backing store if | 
| 3551     // possible. | 3551     // possible. | 
| 3552     __ movq(rdi, FieldOperand(rdx, JSObject::kElementsOffset)); | 3552     __ movq(rdi, FieldOperand(rdx, JSObject::kElementsOffset)); | 
| 3553     __ CompareRoot(rdi, Heap::kEmptyFixedArrayRootIndex); | 3553     __ CompareRoot(rdi, Heap::kEmptyFixedArrayRootIndex); | 
| 3554     __ j(not_equal, &check_capacity); | 3554     __ j(not_equal, &check_capacity); | 
| 3555 | 3555 | 
| 3556     int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements); | 3556     int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements); | 
| 3557     __ AllocateInNewSpace(size, rdi, rbx, r8, &slow, TAG_OBJECT); | 3557     __ Allocate(size, rdi, rbx, r8, &slow, TAG_OBJECT); | 
| 3558 | 3558 | 
| 3559     // rax: value | 3559     // rax: value | 
| 3560     // rcx: key | 3560     // rcx: key | 
| 3561     // rdx: receiver | 3561     // rdx: receiver | 
| 3562     // rdi: elements | 3562     // rdi: elements | 
| 3563     // Initialize the new FixedDoubleArray. Leave elements unitialized for | 3563     // Initialize the new FixedDoubleArray. Leave elements unitialized for | 
| 3564     // efficiency, they are guaranteed to be initialized before use. | 3564     // efficiency, they are guaranteed to be initialized before use. | 
| 3565     __ Move(FieldOperand(rdi, JSObject::kMapOffset), | 3565     __ Move(FieldOperand(rdi, JSObject::kMapOffset), | 
| 3566             masm->isolate()->factory()->fixed_double_array_map()); | 3566             masm->isolate()->factory()->fixed_double_array_map()); | 
| 3567     __ Move(FieldOperand(rdi, FixedDoubleArray::kLengthOffset), | 3567     __ Move(FieldOperand(rdi, FixedDoubleArray::kLengthOffset), | 
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| 3606     __ jmp(ic_slow, RelocInfo::CODE_TARGET); | 3606     __ jmp(ic_slow, RelocInfo::CODE_TARGET); | 
| 3607   } | 3607   } | 
| 3608 } | 3608 } | 
| 3609 | 3609 | 
| 3610 | 3610 | 
| 3611 #undef __ | 3611 #undef __ | 
| 3612 | 3612 | 
| 3613 } }  // namespace v8::internal | 3613 } }  // namespace v8::internal | 
| 3614 | 3614 | 
| 3615 #endif  // V8_TARGET_ARCH_X64 | 3615 #endif  // V8_TARGET_ARCH_X64 | 
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