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1 // Copyright 2012 the V8 project authors. All rights reserved.7 | 1 // Copyright 2012 the V8 project authors. All rights reserved.7 |
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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2591 Handle<String>class_name, | 2591 Handle<String>class_name, |
2592 Register input, | 2592 Register input, |
2593 Register temp, | 2593 Register temp, |
2594 Register temp2) { | 2594 Register temp2) { |
2595 DCHECK(!input.is(temp)); | 2595 DCHECK(!input.is(temp)); |
2596 DCHECK(!input.is(temp2)); | 2596 DCHECK(!input.is(temp2)); |
2597 DCHECK(!temp.is(temp2)); | 2597 DCHECK(!temp.is(temp2)); |
2598 | 2598 |
2599 __ JumpIfSmi(input, is_false); | 2599 __ JumpIfSmi(input, is_false); |
2600 | 2600 |
2601 if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Function"))) { | 2601 if (String::Equals(isolate()->factory()->Function_string(), class_name)) { |
2602 // Assuming the following assertions, we can use the same compares to test | 2602 // Assuming the following assertions, we can use the same compares to test |
2603 // for both being a function type and being in the object type range. | 2603 // for both being a function type and being in the object type range. |
2604 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); | 2604 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); |
2605 STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == | 2605 STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == |
2606 FIRST_SPEC_OBJECT_TYPE + 1); | 2606 FIRST_SPEC_OBJECT_TYPE + 1); |
2607 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == | 2607 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == |
2608 LAST_SPEC_OBJECT_TYPE - 1); | 2608 LAST_SPEC_OBJECT_TYPE - 1); |
2609 STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); | 2609 STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
2610 | 2610 |
2611 __ GetObjectType(input, temp, temp2); | 2611 __ GetObjectType(input, temp, temp2); |
2612 __ Branch(is_false, lt, temp2, Operand(FIRST_SPEC_OBJECT_TYPE)); | 2612 __ Branch(is_false, lt, temp2, Operand(FIRST_SPEC_OBJECT_TYPE)); |
2613 __ Branch(is_true, eq, temp2, Operand(FIRST_SPEC_OBJECT_TYPE)); | 2613 __ Branch(is_true, eq, temp2, Operand(FIRST_SPEC_OBJECT_TYPE)); |
2614 __ Branch(is_true, eq, temp2, Operand(LAST_SPEC_OBJECT_TYPE)); | 2614 __ Branch(is_true, eq, temp2, Operand(LAST_SPEC_OBJECT_TYPE)); |
2615 } else { | 2615 } else { |
2616 // Faster code path to avoid two compares: subtract lower bound from the | 2616 // Faster code path to avoid two compares: subtract lower bound from the |
2617 // actual type and do a signed compare with the width of the type range. | 2617 // actual type and do a signed compare with the width of the type range. |
2618 __ GetObjectType(input, temp, temp2); | 2618 __ GetObjectType(input, temp, temp2); |
2619 __ Subu(temp2, temp2, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | 2619 __ Subu(temp2, temp2, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
2620 __ Branch(is_false, gt, temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - | 2620 __ Branch(is_false, gt, temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - |
2621 FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | 2621 FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
2622 } | 2622 } |
2623 | 2623 |
2624 // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. | 2624 // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. |
2625 // Check if the constructor in the map is a function. | 2625 // Check if the constructor in the map is a function. |
2626 __ lw(temp, FieldMemOperand(temp, Map::kConstructorOffset)); | 2626 __ lw(temp, FieldMemOperand(temp, Map::kConstructorOffset)); |
2627 | 2627 |
2628 // Objects with a non-function constructor have class 'Object'. | 2628 // Objects with a non-function constructor have class 'Object'. |
2629 __ GetObjectType(temp, temp2, temp2); | 2629 __ GetObjectType(temp, temp2, temp2); |
2630 if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Object"))) { | 2630 if (String::Equals(class_name, isolate()->factory()->Object_string())) { |
2631 __ Branch(is_true, ne, temp2, Operand(JS_FUNCTION_TYPE)); | 2631 __ Branch(is_true, ne, temp2, Operand(JS_FUNCTION_TYPE)); |
2632 } else { | 2632 } else { |
2633 __ Branch(is_false, ne, temp2, Operand(JS_FUNCTION_TYPE)); | 2633 __ Branch(is_false, ne, temp2, Operand(JS_FUNCTION_TYPE)); |
2634 } | 2634 } |
2635 | 2635 |
2636 // temp now contains the constructor function. Grab the | 2636 // temp now contains the constructor function. Grab the |
2637 // instance class name from there. | 2637 // instance class name from there. |
2638 __ lw(temp, FieldMemOperand(temp, JSFunction::kSharedFunctionInfoOffset)); | 2638 __ lw(temp, FieldMemOperand(temp, JSFunction::kSharedFunctionInfoOffset)); |
2639 __ lw(temp, FieldMemOperand(temp, | 2639 __ lw(temp, FieldMemOperand(temp, |
2640 SharedFunctionInfo::kInstanceClassNameOffset)); | 2640 SharedFunctionInfo::kInstanceClassNameOffset)); |
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5901 __ li(at, scope_info); | 5901 __ li(at, scope_info); |
5902 __ Push(at, ToRegister(instr->function())); | 5902 __ Push(at, ToRegister(instr->function())); |
5903 CallRuntime(Runtime::kPushBlockContext, 2, instr); | 5903 CallRuntime(Runtime::kPushBlockContext, 2, instr); |
5904 RecordSafepoint(Safepoint::kNoLazyDeopt); | 5904 RecordSafepoint(Safepoint::kNoLazyDeopt); |
5905 } | 5905 } |
5906 | 5906 |
5907 | 5907 |
5908 #undef __ | 5908 #undef __ |
5909 | 5909 |
5910 } } // namespace v8::internal | 5910 } } // namespace v8::internal |
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