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Side by Side Diff: dart/runtime/vm/stub_code_ia32.cc

Issue 59073003: Version 0.8.10.4 (Closed) Base URL: http://dart.googlecode.com/svn/trunk/
Patch Set: Created 7 years, 1 month ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/globals.h" 5 #include "vm/globals.h"
6 #if defined(TARGET_ARCH_IA32) 6 #if defined(TARGET_ARCH_IA32)
7 7
8 #include "vm/assembler.h" 8 #include "vm/assembler.h"
9 #include "vm/compiler.h" 9 #include "vm/compiler.h"
10 #include "vm/dart_entry.h" 10 #include "vm/dart_entry.h"
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1188 const Immediate& raw_null = 1188 const Immediate& raw_null =
1189 Immediate(reinterpret_cast<intptr_t>(Object::null())); 1189 Immediate(reinterpret_cast<intptr_t>(Object::null()));
1190 1190
1191 // EAX: new object start. 1191 // EAX: new object start.
1192 // EBX: next object start. 1192 // EBX: next object start.
1193 // EDI: new object type arguments (if is_cls_parameterized). 1193 // EDI: new object type arguments (if is_cls_parameterized).
1194 // First try inlining the initialization without a loop. 1194 // First try inlining the initialization without a loop.
1195 if (instance_size < (kInlineInstanceSize * kWordSize)) { 1195 if (instance_size < (kInlineInstanceSize * kWordSize)) {
1196 // Check if the object contains any non-header fields. 1196 // Check if the object contains any non-header fields.
1197 // Small objects are initialized using a consecutive set of writes. 1197 // Small objects are initialized using a consecutive set of writes.
1198 for (intptr_t current_offset = sizeof(RawObject); 1198 for (intptr_t current_offset = Instance::NextFieldOffset();
1199 current_offset < instance_size; 1199 current_offset < instance_size;
1200 current_offset += kWordSize) { 1200 current_offset += kWordSize) {
1201 __ movl(Address(EAX, current_offset), raw_null); 1201 __ movl(Address(EAX, current_offset), raw_null);
1202 } 1202 }
1203 } else { 1203 } else {
1204 __ leal(ECX, Address(EAX, sizeof(RawObject))); 1204 __ leal(ECX, Address(EAX, Instance::NextFieldOffset()));
1205 // Loop until the whole object is initialized. 1205 // Loop until the whole object is initialized.
1206 // EAX: new object. 1206 // EAX: new object.
1207 // EBX: next object start. 1207 // EBX: next object start.
1208 // ECX: next word to be initialized. 1208 // ECX: next word to be initialized.
1209 // EDI: new object type arguments (if is_cls_parameterized). 1209 // EDI: new object type arguments (if is_cls_parameterized).
1210 Label init_loop; 1210 Label init_loop;
1211 Label done; 1211 Label done;
1212 __ Bind(&init_loop); 1212 __ Bind(&init_loop);
1213 __ cmpl(ECX, EBX); 1213 __ cmpl(ECX, EBX);
1214 __ j(ABOVE_EQUAL, &done, Assembler::kNearJump); 1214 __ j(ABOVE_EQUAL, &done, Assembler::kNearJump);
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2208 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp); 2208 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
2209 __ popl(temp); 2209 __ popl(temp);
2210 __ popl(right); 2210 __ popl(right);
2211 __ popl(left); 2211 __ popl(left);
2212 __ ret(); 2212 __ ret();
2213 } 2213 }
2214 2214
2215 } // namespace dart 2215 } // namespace dart
2216 2216
2217 #endif // defined TARGET_ARCH_IA32 2217 #endif // defined TARGET_ARCH_IA32
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