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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_ARM | 7 #if V8_TARGET_ARCH_ARM |
8 | 8 |
9 #include "src/arm/assembler-arm.h" | 9 #include "src/arm/assembler-arm.h" |
10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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32 // type: holds the receiver instance type on entry. | 32 // type: holds the receiver instance type on entry. |
33 __ cmp(type, Operand(JS_GLOBAL_OBJECT_TYPE)); | 33 __ cmp(type, Operand(JS_GLOBAL_OBJECT_TYPE)); |
34 __ b(eq, global_object); | 34 __ b(eq, global_object); |
35 __ cmp(type, Operand(JS_BUILTINS_OBJECT_TYPE)); | 35 __ cmp(type, Operand(JS_BUILTINS_OBJECT_TYPE)); |
36 __ b(eq, global_object); | 36 __ b(eq, global_object); |
37 __ cmp(type, Operand(JS_GLOBAL_PROXY_TYPE)); | 37 __ cmp(type, Operand(JS_GLOBAL_PROXY_TYPE)); |
38 __ b(eq, global_object); | 38 __ b(eq, global_object); |
39 } | 39 } |
40 | 40 |
41 | 41 |
42 // Generated code falls through if the receiver is a regular non-global | |
43 // JS object with slow properties and no interceptors. | |
44 static void GenerateNameDictionaryReceiverCheck(MacroAssembler* masm, | |
45 Register receiver, | |
46 Register elements, | |
47 Register t0, | |
48 Register t1, | |
49 Label* miss) { | |
50 // Register usage: | |
51 // receiver: holds the receiver on entry and is unchanged. | |
52 // elements: holds the property dictionary on fall through. | |
53 // Scratch registers: | |
54 // t0: used to holds the receiver map. | |
55 // t1: used to holds the receiver instance type, receiver bit mask and | |
56 // elements map. | |
57 | |
58 // Check that the receiver isn't a smi. | |
59 __ JumpIfSmi(receiver, miss); | |
60 | |
61 // Check that the receiver is a valid JS object. | |
62 __ CompareObjectType(receiver, t0, t1, FIRST_SPEC_OBJECT_TYPE); | |
63 __ b(lt, miss); | |
64 | |
65 // If this assert fails, we have to check upper bound too. | |
66 STATIC_ASSERT(LAST_TYPE == LAST_SPEC_OBJECT_TYPE); | |
67 | |
68 GenerateGlobalInstanceTypeCheck(masm, t1, miss); | |
69 | |
70 // Check that the global object does not require access checks. | |
71 __ ldrb(t1, FieldMemOperand(t0, Map::kBitFieldOffset)); | |
72 __ tst(t1, Operand((1 << Map::kIsAccessCheckNeeded) | | |
73 (1 << Map::kHasNamedInterceptor))); | |
74 __ b(ne, miss); | |
75 | |
76 __ ldr(elements, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); | |
77 __ ldr(t1, FieldMemOperand(elements, HeapObject::kMapOffset)); | |
78 __ LoadRoot(ip, Heap::kHashTableMapRootIndex); | |
79 __ cmp(t1, ip); | |
80 __ b(ne, miss); | |
81 } | |
82 | |
83 | |
84 // Helper function used from LoadIC GenerateNormal. | 42 // Helper function used from LoadIC GenerateNormal. |
85 // | 43 // |
86 // elements: Property dictionary. It is not clobbered if a jump to the miss | 44 // elements: Property dictionary. It is not clobbered if a jump to the miss |
87 // label is done. | 45 // label is done. |
88 // name: Property name. It is not clobbered if a jump to the miss label is | 46 // name: Property name. It is not clobbered if a jump to the miss label is |
89 // done | 47 // done |
90 // result: Register for the result. It is only updated if a jump to the miss | 48 // result: Register for the result. It is only updated if a jump to the miss |
91 // label is not done. Can be the same as elements or name clobbering | 49 // label is not done. Can be the same as elements or name clobbering |
92 // one of these in the case of not jumping to the miss label. | 50 // one of these in the case of not jumping to the miss label. |
93 // The two scratch registers need to be different from elements, name and | 51 // The two scratch registers need to be different from elements, name and |
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321 Code::Flags flags = Code::ComputeHandlerFlags(Code::LOAD_IC); | 279 Code::Flags flags = Code::ComputeHandlerFlags(Code::LOAD_IC); |
322 masm->isolate()->stub_cache()->GenerateProbe( | 280 masm->isolate()->stub_cache()->GenerateProbe( |
323 masm, flags, receiver, name, r3, r4, r5, r6); | 281 masm, flags, receiver, name, r3, r4, r5, r6); |
324 | 282 |
325 // Cache miss: Jump to runtime. | 283 // Cache miss: Jump to runtime. |
326 GenerateMiss(masm); | 284 GenerateMiss(masm); |
327 } | 285 } |
328 | 286 |
329 | 287 |
330 void LoadIC::GenerateNormal(MacroAssembler* masm) { | 288 void LoadIC::GenerateNormal(MacroAssembler* masm) { |
331 // ----------- S t a t e ------------- | 289 Register dictionary = r0; |
332 // -- r2 : name | 290 ASSERT(!dictionary.is(ReceiverRegister())); |
333 // -- lr : return address | 291 ASSERT(!dictionary.is(NameRegister())); |
334 // -- r1 : receiver | |
335 // ----------------------------------- | |
336 ASSERT(r1.is(ReceiverRegister())); | |
337 ASSERT(r2.is(NameRegister())); | |
338 | 292 |
339 Label miss, slow; | 293 Label slow; |
340 | 294 |
341 GenerateNameDictionaryReceiverCheck(masm, r1, r0, r3, r4, &miss); | 295 __ ldr(dictionary, |
342 | 296 FieldMemOperand(ReceiverRegister(), JSObject::kPropertiesOffset)); |
343 // r0: elements | 297 GenerateDictionaryLoad(masm, &slow, dictionary, NameRegister(), r0, r3, r4); |
344 GenerateDictionaryLoad(masm, &slow, r0, r2, r0, r3, r4); | |
345 __ Ret(); | 298 __ Ret(); |
346 | 299 |
347 // Dictionary load failed, go slow (but don't miss). | 300 // Dictionary load failed, go slow (but don't miss). |
348 __ bind(&slow); | 301 __ bind(&slow); |
349 GenerateRuntimeGetProperty(masm); | 302 GenerateRuntimeGetProperty(masm); |
350 | |
351 // Cache miss: Jump to runtime. | |
352 __ bind(&miss); | |
353 GenerateMiss(masm); | |
354 } | 303 } |
355 | 304 |
356 | 305 |
357 // A register that isn't one of the parameters to the load ic. | 306 // A register that isn't one of the parameters to the load ic. |
358 static const Register LoadIC_TempRegister() { return r3; } | 307 static const Register LoadIC_TempRegister() { return r3; } |
359 | 308 |
360 | 309 |
361 void LoadIC::GenerateMiss(MacroAssembler* masm) { | 310 void LoadIC::GenerateMiss(MacroAssembler* masm) { |
362 // The return address is in lr. | 311 // The return address is in lr. |
363 Isolate* isolate = masm->isolate(); | 312 Isolate* isolate = masm->isolate(); |
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1141 ExternalReference(IC_Utility(kStoreIC_Miss), masm->isolate()); | 1090 ExternalReference(IC_Utility(kStoreIC_Miss), masm->isolate()); |
1142 __ TailCallExternalReference(ref, 3, 1); | 1091 __ TailCallExternalReference(ref, 3, 1); |
1143 } | 1092 } |
1144 | 1093 |
1145 | 1094 |
1146 void StoreIC::GenerateNormal(MacroAssembler* masm) { | 1095 void StoreIC::GenerateNormal(MacroAssembler* masm) { |
1147 Label miss; | 1096 Label miss; |
1148 Register receiver = ReceiverRegister(); | 1097 Register receiver = ReceiverRegister(); |
1149 Register name = NameRegister(); | 1098 Register name = NameRegister(); |
1150 Register value = ValueRegister(); | 1099 Register value = ValueRegister(); |
| 1100 Register dictionary = r3; |
1151 ASSERT(receiver.is(r1)); | 1101 ASSERT(receiver.is(r1)); |
1152 ASSERT(name.is(r2)); | 1102 ASSERT(name.is(r2)); |
1153 ASSERT(value.is(r0)); | 1103 ASSERT(value.is(r0)); |
1154 | 1104 |
1155 GenerateNameDictionaryReceiverCheck(masm, receiver, r3, r4, r5, &miss); | 1105 __ ldr(dictionary, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
1156 | 1106 |
1157 GenerateDictionaryStore(masm, &miss, r3, name, value, r4, r5); | 1107 GenerateDictionaryStore(masm, &miss, dictionary, name, value, r4, r5); |
1158 Counters* counters = masm->isolate()->counters(); | 1108 Counters* counters = masm->isolate()->counters(); |
1159 __ IncrementCounter(counters->store_normal_hit(), | 1109 __ IncrementCounter(counters->store_normal_hit(), |
1160 1, r4, r5); | 1110 1, r4, r5); |
1161 __ Ret(); | 1111 __ Ret(); |
1162 | 1112 |
1163 __ bind(&miss); | 1113 __ bind(&miss); |
1164 __ IncrementCounter(counters->store_normal_miss(), 1, r4, r5); | 1114 __ IncrementCounter(counters->store_normal_miss(), 1, r4, r5); |
1165 GenerateMiss(masm); | 1115 GenerateMiss(masm); |
1166 } | 1116 } |
1167 | 1117 |
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1271 } else { | 1221 } else { |
1272 ASSERT(Assembler::GetCondition(branch_instr) == ne); | 1222 ASSERT(Assembler::GetCondition(branch_instr) == ne); |
1273 patcher.EmitCondition(eq); | 1223 patcher.EmitCondition(eq); |
1274 } | 1224 } |
1275 } | 1225 } |
1276 | 1226 |
1277 | 1227 |
1278 } } // namespace v8::internal | 1228 } } // namespace v8::internal |
1279 | 1229 |
1280 #endif // V8_TARGET_ARCH_ARM | 1230 #endif // V8_TARGET_ARCH_ARM |
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