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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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| 128 | 128 |
| 129 | 129 |
| 130 bool LCodeGen::GeneratePrologue() { | 130 bool LCodeGen::GeneratePrologue() { |
| 131 ASSERT(is_generating()); | 131 ASSERT(is_generating()); |
| 132 | 132 |
| 133 if (info()->IsOptimizing()) { | 133 if (info()->IsOptimizing()) { |
| 134 ProfileEntryHookStub::MaybeCallEntryHook(masm_); | 134 ProfileEntryHookStub::MaybeCallEntryHook(masm_); |
| 135 | 135 |
| 136 #ifdef DEBUG | 136 #ifdef DEBUG |
| 137 if (strlen(FLAG_stop_at) > 0 && | 137 if (strlen(FLAG_stop_at) > 0 && |
| 138 info_->function()->name()->IsEqualTo(CStrVector(FLAG_stop_at))) { | 138 info_->function()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) { |
| 139 __ int3(); | 139 __ int3(); |
| 140 } | 140 } |
| 141 #endif | 141 #endif |
| 142 | 142 |
| 143 // Strict mode functions and builtins need to replace the receiver | 143 // Strict mode functions and builtins need to replace the receiver |
| 144 // with undefined when called as functions (without an explicit | 144 // with undefined when called as functions (without an explicit |
| 145 // receiver object). ecx is zero for method calls and non-zero for | 145 // receiver object). ecx is zero for method calls and non-zero for |
| 146 // function calls. | 146 // function calls. |
| 147 if (!info_->is_classic_mode() || info_->is_native()) { | 147 if (!info_->is_classic_mode() || info_->is_native()) { |
| 148 Label ok; | 148 Label ok; |
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| 2404 Label* is_false, | 2404 Label* is_false, |
| 2405 Handle<String>class_name, | 2405 Handle<String>class_name, |
| 2406 Register input, | 2406 Register input, |
| 2407 Register temp, | 2407 Register temp, |
| 2408 Register temp2) { | 2408 Register temp2) { |
| 2409 ASSERT(!input.is(temp)); | 2409 ASSERT(!input.is(temp)); |
| 2410 ASSERT(!input.is(temp2)); | 2410 ASSERT(!input.is(temp2)); |
| 2411 ASSERT(!temp.is(temp2)); | 2411 ASSERT(!temp.is(temp2)); |
| 2412 __ JumpIfSmi(input, is_false); | 2412 __ JumpIfSmi(input, is_false); |
| 2413 | 2413 |
| 2414 if (class_name->IsEqualTo(CStrVector("Function"))) { | 2414 if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Function"))) { |
| 2415 // Assuming the following assertions, we can use the same compares to test | 2415 // Assuming the following assertions, we can use the same compares to test |
| 2416 // for both being a function type and being in the object type range. | 2416 // for both being a function type and being in the object type range. |
| 2417 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); | 2417 STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); |
| 2418 STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == | 2418 STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == |
| 2419 FIRST_SPEC_OBJECT_TYPE + 1); | 2419 FIRST_SPEC_OBJECT_TYPE + 1); |
| 2420 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == | 2420 STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == |
| 2421 LAST_SPEC_OBJECT_TYPE - 1); | 2421 LAST_SPEC_OBJECT_TYPE - 1); |
| 2422 STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); | 2422 STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| 2423 __ CmpObjectType(input, FIRST_SPEC_OBJECT_TYPE, temp); | 2423 __ CmpObjectType(input, FIRST_SPEC_OBJECT_TYPE, temp); |
| 2424 __ j(below, is_false); | 2424 __ j(below, is_false); |
| 2425 __ j(equal, is_true); | 2425 __ j(equal, is_true); |
| 2426 __ CmpInstanceType(temp, LAST_SPEC_OBJECT_TYPE); | 2426 __ CmpInstanceType(temp, LAST_SPEC_OBJECT_TYPE); |
| 2427 __ j(equal, is_true); | 2427 __ j(equal, is_true); |
| 2428 } else { | 2428 } else { |
| 2429 // Faster code path to avoid two compares: subtract lower bound from the | 2429 // Faster code path to avoid two compares: subtract lower bound from the |
| 2430 // actual type and do a signed compare with the width of the type range. | 2430 // actual type and do a signed compare with the width of the type range. |
| 2431 __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); | 2431 __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); |
| 2432 __ movzx_b(temp2, FieldOperand(temp, Map::kInstanceTypeOffset)); | 2432 __ movzx_b(temp2, FieldOperand(temp, Map::kInstanceTypeOffset)); |
| 2433 __ sub(Operand(temp2), Immediate(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | 2433 __ sub(Operand(temp2), Immediate(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| 2434 __ cmp(Operand(temp2), Immediate(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - | 2434 __ cmp(Operand(temp2), Immediate(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - |
| 2435 FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); | 2435 FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| 2436 __ j(above, is_false); | 2436 __ j(above, is_false); |
| 2437 } | 2437 } |
| 2438 | 2438 |
| 2439 // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. | 2439 // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. |
| 2440 // Check if the constructor in the map is a function. | 2440 // Check if the constructor in the map is a function. |
| 2441 __ mov(temp, FieldOperand(temp, Map::kConstructorOffset)); | 2441 __ mov(temp, FieldOperand(temp, Map::kConstructorOffset)); |
| 2442 // Objects with a non-function constructor have class 'Object'. | 2442 // Objects with a non-function constructor have class 'Object'. |
| 2443 __ CmpObjectType(temp, JS_FUNCTION_TYPE, temp2); | 2443 __ CmpObjectType(temp, JS_FUNCTION_TYPE, temp2); |
| 2444 if (class_name->IsEqualTo(CStrVector("Object"))) { | 2444 if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Object"))) { |
| 2445 __ j(not_equal, is_true); | 2445 __ j(not_equal, is_true); |
| 2446 } else { | 2446 } else { |
| 2447 __ j(not_equal, is_false); | 2447 __ j(not_equal, is_false); |
| 2448 } | 2448 } |
| 2449 | 2449 |
| 2450 // temp now contains the constructor function. Grab the | 2450 // temp now contains the constructor function. Grab the |
| 2451 // instance class name from there. | 2451 // instance class name from there. |
| 2452 __ mov(temp, FieldOperand(temp, JSFunction::kSharedFunctionInfoOffset)); | 2452 __ mov(temp, FieldOperand(temp, JSFunction::kSharedFunctionInfoOffset)); |
| 2453 __ mov(temp, FieldOperand(temp, | 2453 __ mov(temp, FieldOperand(temp, |
| 2454 SharedFunctionInfo::kInstanceClassNameOffset)); | 2454 SharedFunctionInfo::kInstanceClassNameOffset)); |
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| 4425 }; | 4425 }; |
| 4426 | 4426 |
| 4427 DeferredStringCharFromCode* deferred = | 4427 DeferredStringCharFromCode* deferred = |
| 4428 new(zone()) DeferredStringCharFromCode(this, instr); | 4428 new(zone()) DeferredStringCharFromCode(this, instr); |
| 4429 | 4429 |
| 4430 ASSERT(instr->hydrogen()->value()->representation().IsInteger32()); | 4430 ASSERT(instr->hydrogen()->value()->representation().IsInteger32()); |
| 4431 Register char_code = ToRegister(instr->char_code()); | 4431 Register char_code = ToRegister(instr->char_code()); |
| 4432 Register result = ToRegister(instr->result()); | 4432 Register result = ToRegister(instr->result()); |
| 4433 ASSERT(!char_code.is(result)); | 4433 ASSERT(!char_code.is(result)); |
| 4434 | 4434 |
| 4435 __ cmp(char_code, String::kMaxAsciiCharCode); | 4435 __ cmp(char_code, String::kMaxOneByteCharCode); |
| 4436 __ j(above, deferred->entry()); | 4436 __ j(above, deferred->entry()); |
| 4437 __ Set(result, Immediate(factory()->single_character_string_cache())); | 4437 __ Set(result, Immediate(factory()->single_character_string_cache())); |
| 4438 __ mov(result, FieldOperand(result, | 4438 __ mov(result, FieldOperand(result, |
| 4439 char_code, times_pointer_size, | 4439 char_code, times_pointer_size, |
| 4440 FixedArray::kHeaderSize)); | 4440 FixedArray::kHeaderSize)); |
| 4441 __ cmp(result, factory()->undefined_value()); | 4441 __ cmp(result, factory()->undefined_value()); |
| 4442 __ j(equal, deferred->entry()); | 4442 __ j(equal, deferred->entry()); |
| 4443 __ bind(deferred->exit()); | 4443 __ bind(deferred->exit()); |
| 4444 } | 4444 } |
| 4445 | 4445 |
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| 5955 FixedArray::kHeaderSize - kPointerSize)); | 5955 FixedArray::kHeaderSize - kPointerSize)); |
| 5956 __ bind(&done); | 5956 __ bind(&done); |
| 5957 } | 5957 } |
| 5958 | 5958 |
| 5959 | 5959 |
| 5960 #undef __ | 5960 #undef __ |
| 5961 | 5961 |
| 5962 } } // namespace v8::internal | 5962 } } // namespace v8::internal |
| 5963 | 5963 |
| 5964 #endif // V8_TARGET_ARCH_IA32 | 5964 #endif // V8_TARGET_ARCH_IA32 |
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