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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 #if V8_TARGET_ARCH_X87 | 5 #if V8_TARGET_ARCH_X87 |
6 | 6 |
7 #include "src/code-factory.h" | 7 #include "src/code-factory.h" |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/compiler.h" | 10 #include "src/compiler.h" |
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3197 | 3197 |
3198 __ JumpIfSmi(eax, if_false); | 3198 __ JumpIfSmi(eax, if_false); |
3199 __ CmpObjectType(eax, SIMD128_VALUE_TYPE, ebx); | 3199 __ CmpObjectType(eax, SIMD128_VALUE_TYPE, ebx); |
3200 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | 3200 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
3201 Split(equal, if_true, if_false, fall_through); | 3201 Split(equal, if_true, if_false, fall_through); |
3202 | 3202 |
3203 context()->Plug(if_true, if_false); | 3203 context()->Plug(if_true, if_false); |
3204 } | 3204 } |
3205 | 3205 |
3206 | 3206 |
3207 void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf( | |
3208 CallRuntime* expr) { | |
3209 ZoneList<Expression*>* args = expr->arguments(); | |
3210 DCHECK(args->length() == 1); | |
3211 | |
3212 VisitForAccumulatorValue(args->at(0)); | |
3213 | |
3214 Label materialize_true, materialize_false, skip_lookup; | |
3215 Label* if_true = NULL; | |
3216 Label* if_false = NULL; | |
3217 Label* fall_through = NULL; | |
3218 context()->PrepareTest(&materialize_true, &materialize_false, | |
3219 &if_true, &if_false, &fall_through); | |
3220 | |
3221 __ AssertNotSmi(eax); | |
3222 | |
3223 // Check whether this map has already been checked to be safe for default | |
3224 // valueOf. | |
3225 __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); | |
3226 __ test_b(FieldOperand(ebx, Map::kBitField2Offset), | |
3227 1 << Map::kStringWrapperSafeForDefaultValueOf); | |
3228 __ j(not_zero, &skip_lookup); | |
3229 | |
3230 // Check for fast case object. Return false for slow case objects. | |
3231 __ mov(ecx, FieldOperand(eax, JSObject::kPropertiesOffset)); | |
3232 __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset)); | |
3233 __ cmp(ecx, isolate()->factory()->hash_table_map()); | |
3234 __ j(equal, if_false); | |
3235 | |
3236 // Look for valueOf string in the descriptor array, and indicate false if | |
3237 // found. Since we omit an enumeration index check, if it is added via a | |
3238 // transition that shares its descriptor array, this is a false positive. | |
3239 Label entry, loop, done; | |
3240 | |
3241 // Skip loop if no descriptors are valid. | |
3242 __ NumberOfOwnDescriptors(ecx, ebx); | |
3243 __ cmp(ecx, 0); | |
3244 __ j(equal, &done); | |
3245 | |
3246 __ LoadInstanceDescriptors(ebx, ebx); | |
3247 // ebx: descriptor array. | |
3248 // ecx: valid entries in the descriptor array. | |
3249 // Calculate the end of the descriptor array. | |
3250 STATIC_ASSERT(kSmiTag == 0); | |
3251 STATIC_ASSERT(kSmiTagSize == 1); | |
3252 STATIC_ASSERT(kPointerSize == 4); | |
3253 __ imul(ecx, ecx, DescriptorArray::kDescriptorSize); | |
3254 __ lea(ecx, Operand(ebx, ecx, times_4, DescriptorArray::kFirstOffset)); | |
3255 // Calculate location of the first key name. | |
3256 __ add(ebx, Immediate(DescriptorArray::kFirstOffset)); | |
3257 // Loop through all the keys in the descriptor array. If one of these is the | |
3258 // internalized string "valueOf" the result is false. | |
3259 __ jmp(&entry); | |
3260 __ bind(&loop); | |
3261 __ mov(edx, FieldOperand(ebx, 0)); | |
3262 __ cmp(edx, isolate()->factory()->valueOf_string()); | |
3263 __ j(equal, if_false); | |
3264 __ add(ebx, Immediate(DescriptorArray::kDescriptorSize * kPointerSize)); | |
3265 __ bind(&entry); | |
3266 __ cmp(ebx, ecx); | |
3267 __ j(not_equal, &loop); | |
3268 | |
3269 __ bind(&done); | |
3270 | |
3271 // Reload map as register ebx was used as temporary above. | |
3272 __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); | |
3273 | |
3274 // Set the bit in the map to indicate that there is no local valueOf field. | |
3275 __ or_(FieldOperand(ebx, Map::kBitField2Offset), | |
3276 Immediate(1 << Map::kStringWrapperSafeForDefaultValueOf)); | |
3277 | |
3278 __ bind(&skip_lookup); | |
3279 | |
3280 // If a valueOf property is not found on the object check that its | |
3281 // prototype is the un-modified String prototype. If not result is false. | |
3282 __ mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset)); | |
3283 __ JumpIfSmi(ecx, if_false); | |
3284 __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset)); | |
3285 __ mov(edx, Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); | |
3286 __ mov(edx, | |
3287 FieldOperand(edx, GlobalObject::kNativeContextOffset)); | |
3288 __ cmp(ecx, | |
3289 ContextOperand(edx, | |
3290 Context::STRING_FUNCTION_PROTOTYPE_MAP_INDEX)); | |
3291 PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); | |
3292 Split(equal, if_true, if_false, fall_through); | |
3293 | |
3294 context()->Plug(if_true, if_false); | |
3295 } | |
3296 | |
3297 | |
3298 void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) { | 3207 void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) { |
3299 ZoneList<Expression*>* args = expr->arguments(); | 3208 ZoneList<Expression*>* args = expr->arguments(); |
3300 DCHECK(args->length() == 1); | 3209 DCHECK(args->length() == 1); |
3301 | 3210 |
3302 VisitForAccumulatorValue(args->at(0)); | 3211 VisitForAccumulatorValue(args->at(0)); |
3303 | 3212 |
3304 Label materialize_true, materialize_false; | 3213 Label materialize_true, materialize_false; |
3305 Label* if_true = NULL; | 3214 Label* if_true = NULL; |
3306 Label* if_false = NULL; | 3215 Label* if_false = NULL; |
3307 Label* fall_through = NULL; | 3216 Label* fall_through = NULL; |
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5231 Assembler::target_address_at(call_target_address, | 5140 Assembler::target_address_at(call_target_address, |
5232 unoptimized_code)); | 5141 unoptimized_code)); |
5233 return OSR_AFTER_STACK_CHECK; | 5142 return OSR_AFTER_STACK_CHECK; |
5234 } | 5143 } |
5235 | 5144 |
5236 | 5145 |
5237 } // namespace internal | 5146 } // namespace internal |
5238 } // namespace v8 | 5147 } // namespace v8 |
5239 | 5148 |
5240 #endif // V8_TARGET_ARCH_X87 | 5149 #endif // V8_TARGET_ARCH_X87 |
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