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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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_ARM64 | 7 #if V8_TARGET_ARCH_ARM64 | 
| 8 | 8 | 
| 9 #include "src/code-factory.h" | 9 #include "src/code-factory.h" | 
| 10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" | 
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| 189     } | 189     } | 
| 190   } | 190   } | 
| 191 | 191 | 
| 192   bool function_in_register_x1 = true; | 192   bool function_in_register_x1 = true; | 
| 193 | 193 | 
| 194   int heap_slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; | 194   int heap_slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; | 
| 195   if (heap_slots > 0) { | 195   if (heap_slots > 0) { | 
| 196     // Argument to NewContext is the function, which is still in x1. | 196     // Argument to NewContext is the function, which is still in x1. | 
| 197     Comment cmnt(masm_, "[ Allocate context"); | 197     Comment cmnt(masm_, "[ Allocate context"); | 
| 198     bool need_write_barrier = true; | 198     bool need_write_barrier = true; | 
| 199     if (FLAG_harmony_scoping && info->scope()->is_global_scope()) { | 199     if (FLAG_harmony_scoping && info->scope()->is_script_scope()) { | 
| 200       __ Mov(x10, Operand(info->scope()->GetScopeInfo())); | 200       __ Mov(x10, Operand(info->scope()->GetScopeInfo())); | 
| 201       __ Push(x1, x10); | 201       __ Push(x1, x10); | 
| 202       __ CallRuntime(Runtime::kNewGlobalContext, 2); | 202       __ CallRuntime(Runtime::kNewScriptContext, 2); | 
| 203     } else if (heap_slots <= FastNewContextStub::kMaximumSlots) { | 203     } else if (heap_slots <= FastNewContextStub::kMaximumSlots) { | 
| 204       FastNewContextStub stub(isolate(), heap_slots); | 204       FastNewContextStub stub(isolate(), heap_slots); | 
| 205       __ CallStub(&stub); | 205       __ CallStub(&stub); | 
| 206       // Result of FastNewContextStub is always in new space. | 206       // Result of FastNewContextStub is always in new space. | 
| 207       need_write_barrier = false; | 207       need_write_barrier = false; | 
| 208     } else { | 208     } else { | 
| 209       __ Push(x1); | 209       __ Push(x1); | 
| 210       __ CallRuntime(Runtime::kNewFunctionContext, 1); | 210       __ CallRuntime(Runtime::kNewFunctionContext, 1); | 
| 211     } | 211     } | 
| 212     function_in_register_x1 = false; | 212     function_in_register_x1 = false; | 
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| 927 | 927 | 
| 928 void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) { | 928 void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) { | 
| 929   Variable* variable = declaration->proxy()->var(); | 929   Variable* variable = declaration->proxy()->var(); | 
| 930   DCHECK(variable->location() == Variable::CONTEXT); | 930   DCHECK(variable->location() == Variable::CONTEXT); | 
| 931   DCHECK(variable->interface()->IsFrozen()); | 931   DCHECK(variable->interface()->IsFrozen()); | 
| 932 | 932 | 
| 933   Comment cmnt(masm_, "[ ModuleDeclaration"); | 933   Comment cmnt(masm_, "[ ModuleDeclaration"); | 
| 934   EmitDebugCheckDeclarationContext(variable); | 934   EmitDebugCheckDeclarationContext(variable); | 
| 935 | 935 | 
| 936   // Load instance object. | 936   // Load instance object. | 
| 937   __ LoadContext(x1, scope_->ContextChainLength(scope_->GlobalScope())); | 937   __ LoadContext(x1, scope_->ContextChainLength(scope_->ScriptScope())); | 
| 938   __ Ldr(x1, ContextMemOperand(x1, variable->interface()->Index())); | 938   __ Ldr(x1, ContextMemOperand(x1, variable->interface()->Index())); | 
| 939   __ Ldr(x1, ContextMemOperand(x1, Context::EXTENSION_INDEX)); | 939   __ Ldr(x1, ContextMemOperand(x1, Context::EXTENSION_INDEX)); | 
| 940 | 940 | 
| 941   // Assign it. | 941   // Assign it. | 
| 942   __ Str(x1, ContextMemOperand(cp, variable->index())); | 942   __ Str(x1, ContextMemOperand(cp, variable->index())); | 
| 943   // We know that we have written a module, which is not a smi. | 943   // We know that we have written a module, which is not a smi. | 
| 944   __ RecordWriteContextSlot(cp, | 944   __ RecordWriteContextSlot(cp, | 
| 945                             Context::SlotOffset(variable->index()), | 945                             Context::SlotOffset(variable->index()), | 
| 946                             x1, | 946                             x1, | 
| 947                             x3, | 947                             x3, | 
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| 5104 } | 5104 } | 
| 5105 | 5105 | 
| 5106 | 5106 | 
| 5107 void FullCodeGenerator::LoadContextField(Register dst, int context_index) { | 5107 void FullCodeGenerator::LoadContextField(Register dst, int context_index) { | 
| 5108   __ Ldr(dst, ContextMemOperand(cp, context_index)); | 5108   __ Ldr(dst, ContextMemOperand(cp, context_index)); | 
| 5109 } | 5109 } | 
| 5110 | 5110 | 
| 5111 | 5111 | 
| 5112 void FullCodeGenerator::PushFunctionArgumentForContextAllocation() { | 5112 void FullCodeGenerator::PushFunctionArgumentForContextAllocation() { | 
| 5113   Scope* declaration_scope = scope()->DeclarationScope(); | 5113   Scope* declaration_scope = scope()->DeclarationScope(); | 
| 5114   if (declaration_scope->is_global_scope() || | 5114   if (declaration_scope->is_script_scope() || | 
| 5115       declaration_scope->is_module_scope()) { | 5115       declaration_scope->is_module_scope()) { | 
| 5116     // Contexts nested in the native context have a canonical empty function | 5116     // Contexts nested in the native context have a canonical empty function | 
| 5117     // as their closure, not the anonymous closure containing the global | 5117     // as their closure, not the anonymous closure containing the global | 
| 5118     // code.  Pass a smi sentinel and let the runtime look up the empty | 5118     // code.  Pass a smi sentinel and let the runtime look up the empty | 
| 5119     // function. | 5119     // function. | 
| 5120     DCHECK(kSmiTag == 0); | 5120     DCHECK(kSmiTag == 0); | 
| 5121     __ Push(xzr); | 5121     __ Push(xzr); | 
| 5122   } else if (declaration_scope->is_eval_scope()) { | 5122   } else if (declaration_scope->is_eval_scope()) { | 
| 5123     // Contexts created by a call to eval have the same closure as the | 5123     // Contexts created by a call to eval have the same closure as the | 
| 5124     // context calling eval, not the anonymous closure containing the eval | 5124     // context calling eval, not the anonymous closure containing the eval | 
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| 5323   return previous_; | 5323   return previous_; | 
| 5324 } | 5324 } | 
| 5325 | 5325 | 
| 5326 | 5326 | 
| 5327 #undef __ | 5327 #undef __ | 
| 5328 | 5328 | 
| 5329 | 5329 | 
| 5330 } }  // namespace v8::internal | 5330 } }  // namespace v8::internal | 
| 5331 | 5331 | 
| 5332 #endif  // V8_TARGET_ARCH_ARM64 | 5332 #endif  // V8_TARGET_ARCH_ARM64 | 
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