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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/base/bits.h" | 9 #include "src/base/bits.h" |
10 #include "src/bootstrapper.h" | 10 #include "src/bootstrapper.h" |
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1823 Label initialize, done, miss, megamorphic, not_array_function; | 1823 Label initialize, done, miss, megamorphic, not_array_function; |
1824 | 1824 |
1825 // Load the cache state into ecx. | 1825 // Load the cache state into ecx. |
1826 __ mov(ecx, FieldOperand(ebx, edx, times_half_pointer_size, | 1826 __ mov(ecx, FieldOperand(ebx, edx, times_half_pointer_size, |
1827 FixedArray::kHeaderSize)); | 1827 FixedArray::kHeaderSize)); |
1828 | 1828 |
1829 // A monomorphic cache hit or an already megamorphic state: invoke the | 1829 // A monomorphic cache hit or an already megamorphic state: invoke the |
1830 // function without changing the state. | 1830 // function without changing the state. |
1831 __ cmp(ecx, edi); | 1831 __ cmp(ecx, edi); |
1832 __ j(equal, &done, Label::kFar); | 1832 __ j(equal, &done, Label::kFar); |
1833 __ cmp(ecx, Immediate(TypeFeedbackInfo::MegamorphicSentinel(isolate))); | 1833 __ cmp(ecx, Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate))); |
1834 __ j(equal, &done, Label::kFar); | 1834 __ j(equal, &done, Label::kFar); |
1835 | 1835 |
1836 if (!FLAG_pretenuring_call_new) { | 1836 if (!FLAG_pretenuring_call_new) { |
1837 // If we came here, we need to see if we are the array function. | 1837 // If we came here, we need to see if we are the array function. |
1838 // If we didn't have a matching function, and we didn't find the megamorph | 1838 // If we didn't have a matching function, and we didn't find the megamorph |
1839 // sentinel, then we have in the slot either some other function or an | 1839 // sentinel, then we have in the slot either some other function or an |
1840 // AllocationSite. Do a map check on the object in ecx. | 1840 // AllocationSite. Do a map check on the object in ecx. |
1841 Handle<Map> allocation_site_map = isolate->factory()->allocation_site_map(); | 1841 Handle<Map> allocation_site_map = isolate->factory()->allocation_site_map(); |
1842 __ cmp(FieldOperand(ecx, 0), Immediate(allocation_site_map)); | 1842 __ cmp(FieldOperand(ecx, 0), Immediate(allocation_site_map)); |
1843 __ j(not_equal, &miss); | 1843 __ j(not_equal, &miss); |
1844 | 1844 |
1845 // Make sure the function is the Array() function | 1845 // Make sure the function is the Array() function |
1846 __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx); | 1846 __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx); |
1847 __ cmp(edi, ecx); | 1847 __ cmp(edi, ecx); |
1848 __ j(not_equal, &megamorphic); | 1848 __ j(not_equal, &megamorphic); |
1849 __ jmp(&done, Label::kFar); | 1849 __ jmp(&done, Label::kFar); |
1850 } | 1850 } |
1851 | 1851 |
1852 __ bind(&miss); | 1852 __ bind(&miss); |
1853 | 1853 |
1854 // A monomorphic miss (i.e, here the cache is not uninitialized) goes | 1854 // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
1855 // megamorphic. | 1855 // megamorphic. |
1856 __ cmp(ecx, Immediate(TypeFeedbackInfo::UninitializedSentinel(isolate))); | 1856 __ cmp(ecx, Immediate(TypeFeedbackVector::UninitializedSentinel(isolate))); |
1857 __ j(equal, &initialize); | 1857 __ j(equal, &initialize); |
1858 // MegamorphicSentinel is an immortal immovable object (undefined) so no | 1858 // MegamorphicSentinel is an immortal immovable object (undefined) so no |
1859 // write-barrier is needed. | 1859 // write-barrier is needed. |
1860 __ bind(&megamorphic); | 1860 __ bind(&megamorphic); |
1861 __ mov(FieldOperand(ebx, edx, times_half_pointer_size, | 1861 __ mov( |
1862 FixedArray::kHeaderSize), | 1862 FieldOperand(ebx, edx, times_half_pointer_size, FixedArray::kHeaderSize), |
1863 Immediate(TypeFeedbackInfo::MegamorphicSentinel(isolate))); | 1863 Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate))); |
1864 __ jmp(&done, Label::kFar); | 1864 __ jmp(&done, Label::kFar); |
1865 | 1865 |
1866 // An uninitialized cache is patched with the function or sentinel to | 1866 // An uninitialized cache is patched with the function or sentinel to |
1867 // indicate the ElementsKind if function is the Array constructor. | 1867 // indicate the ElementsKind if function is the Array constructor. |
1868 __ bind(&initialize); | 1868 __ bind(&initialize); |
1869 if (!FLAG_pretenuring_call_new) { | 1869 if (!FLAG_pretenuring_call_new) { |
1870 // Make sure the function is the Array() function | 1870 // Make sure the function is the Array() function |
1871 __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx); | 1871 __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx); |
1872 __ cmp(edi, ecx); | 1872 __ cmp(edi, ecx); |
1873 __ j(not_equal, ¬_array_function); | 1873 __ j(not_equal, ¬_array_function); |
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2189 if (CallAsMethod()) { | 2189 if (CallAsMethod()) { |
2190 __ bind(&wrap); | 2190 __ bind(&wrap); |
2191 EmitWrapCase(masm, argc, &cont); | 2191 EmitWrapCase(masm, argc, &cont); |
2192 } | 2192 } |
2193 | 2193 |
2194 __ bind(&extra_checks_or_miss); | 2194 __ bind(&extra_checks_or_miss); |
2195 Label miss; | 2195 Label miss; |
2196 | 2196 |
2197 __ mov(ecx, FieldOperand(ebx, edx, times_half_pointer_size, | 2197 __ mov(ecx, FieldOperand(ebx, edx, times_half_pointer_size, |
2198 FixedArray::kHeaderSize)); | 2198 FixedArray::kHeaderSize)); |
2199 __ cmp(ecx, Immediate(TypeFeedbackInfo::MegamorphicSentinel(isolate))); | 2199 __ cmp(ecx, Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate))); |
2200 __ j(equal, &slow_start); | 2200 __ j(equal, &slow_start); |
2201 __ cmp(ecx, Immediate(TypeFeedbackInfo::UninitializedSentinel(isolate))); | 2201 __ cmp(ecx, Immediate(TypeFeedbackVector::UninitializedSentinel(isolate))); |
2202 __ j(equal, &miss); | 2202 __ j(equal, &miss); |
2203 | 2203 |
2204 if (!FLAG_trace_ic) { | 2204 if (!FLAG_trace_ic) { |
2205 // We are going megamorphic. If the feedback is a JSFunction, it is fine | 2205 // We are going megamorphic. If the feedback is a JSFunction, it is fine |
2206 // to handle it here. More complex cases are dealt with in the runtime. | 2206 // to handle it here. More complex cases are dealt with in the runtime. |
2207 __ AssertNotSmi(ecx); | 2207 __ AssertNotSmi(ecx); |
2208 __ CmpObjectType(ecx, JS_FUNCTION_TYPE, ecx); | 2208 __ CmpObjectType(ecx, JS_FUNCTION_TYPE, ecx); |
2209 __ j(not_equal, &miss); | 2209 __ j(not_equal, &miss); |
2210 __ mov(FieldOperand(ebx, edx, times_half_pointer_size, | 2210 __ mov(FieldOperand(ebx, edx, times_half_pointer_size, |
2211 FixedArray::kHeaderSize), | 2211 FixedArray::kHeaderSize), |
2212 Immediate(TypeFeedbackInfo::MegamorphicSentinel(isolate))); | 2212 Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate))); |
2213 __ jmp(&slow_start); | 2213 __ jmp(&slow_start); |
2214 } | 2214 } |
2215 | 2215 |
2216 // We are here because tracing is on or we are going monomorphic. | 2216 // We are here because tracing is on or we are going monomorphic. |
2217 __ bind(&miss); | 2217 __ bind(&miss); |
2218 GenerateMiss(masm); | 2218 GenerateMiss(masm); |
2219 | 2219 |
2220 // the slow case | 2220 // the slow case |
2221 __ bind(&slow_start); | 2221 __ bind(&slow_start); |
2222 | 2222 |
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4669 Operand(ebp, 7 * kPointerSize), | 4669 Operand(ebp, 7 * kPointerSize), |
4670 NULL); | 4670 NULL); |
4671 } | 4671 } |
4672 | 4672 |
4673 | 4673 |
4674 #undef __ | 4674 #undef __ |
4675 | 4675 |
4676 } } // namespace v8::internal | 4676 } } // namespace v8::internal |
4677 | 4677 |
4678 #endif // V8_TARGET_ARCH_IA32 | 4678 #endif // V8_TARGET_ARCH_IA32 |
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