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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 // 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_IA32 | 7 #if V8_TARGET_ARCH_IA32 |
8 | 8 |
9 #include "src/code-stubs.h" | 9 #include "src/code-stubs.h" |
10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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2529 Label* is_false, | 2529 Label* is_false, |
2530 Handle<String>class_name, | 2530 Handle<String>class_name, |
2531 Register input, | 2531 Register input, |
2532 Register temp, | 2532 Register temp, |
2533 Register temp2) { | 2533 Register temp2) { |
2534 DCHECK(!input.is(temp)); | 2534 DCHECK(!input.is(temp)); |
2535 DCHECK(!input.is(temp2)); | 2535 DCHECK(!input.is(temp2)); |
2536 DCHECK(!temp.is(temp2)); | 2536 DCHECK(!temp.is(temp2)); |
2537 __ JumpIfSmi(input, is_false); | 2537 __ JumpIfSmi(input, is_false); |
2538 | 2538 |
2539 if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Function"))) { | 2539 if (String::Equals(isolate()->factory()->Function_string(), class_name)) { |
2540 // Assuming the following assertions, we can use the same compares to test | 2540 // Assuming the following assertions, we can use the same compares to test |
2541 // for both being a function type and being in the object type range. | 2541 // for both being a function type and being in the object type range. |
2542 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); | 2542 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); |
2543 STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == | 2543 STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == |
2544 FIRST_SPEC_OBJECT_TYPE + 1); | 2544 FIRST_SPEC_OBJECT_TYPE + 1); |
2545 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == | 2545 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == |
2546 LAST_SPEC_OBJECT_TYPE - 1); | 2546 LAST_SPEC_OBJECT_TYPE - 1); |
2547 STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); | 2547 STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
2548 __ CmpObjectType(input, FIRST_SPEC_OBJECT_TYPE, temp); | 2548 __ CmpObjectType(input, FIRST_SPEC_OBJECT_TYPE, temp); |
2549 __ j(below, is_false); | 2549 __ j(below, is_false); |
2550 __ j(equal, is_true); | 2550 __ j(equal, is_true); |
2551 __ CmpInstanceType(temp, LAST_SPEC_OBJECT_TYPE); | 2551 __ CmpInstanceType(temp, LAST_SPEC_OBJECT_TYPE); |
2552 __ j(equal, is_true); | 2552 __ j(equal, is_true); |
2553 } else { | 2553 } else { |
2554 // Faster code path to avoid two compares: subtract lower bound from the | 2554 // Faster code path to avoid two compares: subtract lower bound from the |
2555 // actual type and do a signed compare with the width of the type range. | 2555 // actual type and do a signed compare with the width of the type range. |
2556 __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); | 2556 __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); |
2557 __ movzx_b(temp2, FieldOperand(temp, Map::kInstanceTypeOffset)); | 2557 __ movzx_b(temp2, FieldOperand(temp, Map::kInstanceTypeOffset)); |
2558 __ sub(Operand(temp2), Immediate(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | 2558 __ sub(Operand(temp2), Immediate(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
2559 __ cmp(Operand(temp2), Immediate(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - | 2559 __ cmp(Operand(temp2), Immediate(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - |
2560 FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | 2560 FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
2561 __ j(above, is_false); | 2561 __ j(above, is_false); |
2562 } | 2562 } |
2563 | 2563 |
2564 // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. | 2564 // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. |
2565 // Check if the constructor in the map is a function. | 2565 // Check if the constructor in the map is a function. |
2566 __ mov(temp, FieldOperand(temp, Map::kConstructorOffset)); | 2566 __ mov(temp, FieldOperand(temp, Map::kConstructorOffset)); |
2567 // Objects with a non-function constructor have class 'Object'. | 2567 // Objects with a non-function constructor have class 'Object'. |
2568 __ CmpObjectType(temp, JS_FUNCTION_TYPE, temp2); | 2568 __ CmpObjectType(temp, JS_FUNCTION_TYPE, temp2); |
2569 if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Object"))) { | 2569 if (String::Equals(class_name, isolate()->factory()->Object_string())) { |
2570 __ j(not_equal, is_true); | 2570 __ j(not_equal, is_true); |
2571 } else { | 2571 } else { |
2572 __ j(not_equal, is_false); | 2572 __ j(not_equal, is_false); |
2573 } | 2573 } |
2574 | 2574 |
2575 // temp now contains the constructor function. Grab the | 2575 // temp now contains the constructor function. Grab the |
2576 // instance class name from there. | 2576 // instance class name from there. |
2577 __ mov(temp, FieldOperand(temp, JSFunction::kSharedFunctionInfoOffset)); | 2577 __ mov(temp, FieldOperand(temp, JSFunction::kSharedFunctionInfoOffset)); |
2578 __ mov(temp, FieldOperand(temp, | 2578 __ mov(temp, FieldOperand(temp, |
2579 SharedFunctionInfo::kInstanceClassNameOffset)); | 2579 SharedFunctionInfo::kInstanceClassNameOffset)); |
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5675 CallRuntime(Runtime::kPushBlockContext, 2, instr); | 5675 CallRuntime(Runtime::kPushBlockContext, 2, instr); |
5676 RecordSafepoint(Safepoint::kNoLazyDeopt); | 5676 RecordSafepoint(Safepoint::kNoLazyDeopt); |
5677 } | 5677 } |
5678 | 5678 |
5679 | 5679 |
5680 #undef __ | 5680 #undef __ |
5681 | 5681 |
5682 } } // namespace v8::internal | 5682 } } // namespace v8::internal |
5683 | 5683 |
5684 #endif // V8_TARGET_ARCH_IA32 | 5684 #endif // V8_TARGET_ARCH_IA32 |
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