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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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238 } | 238 } |
239 VisitDeclarations(scope()->declarations()); | 239 VisitDeclarations(scope()->declarations()); |
240 } | 240 } |
241 | 241 |
242 { Comment cmnt(masm_, "[ Stack check"); | 242 { Comment cmnt(masm_, "[ Stack check"); |
243 PrepareForBailoutForId(AstNode::kFunctionEntryId, NO_REGISTERS); | 243 PrepareForBailoutForId(AstNode::kFunctionEntryId, NO_REGISTERS); |
244 Label ok; | 244 Label ok; |
245 ExternalReference stack_limit = | 245 ExternalReference stack_limit = |
246 ExternalReference::address_of_stack_limit(isolate()); | 246 ExternalReference::address_of_stack_limit(isolate()); |
247 __ cmp(esp, Operand::StaticVariable(stack_limit)); | 247 __ cmp(esp, Operand::StaticVariable(stack_limit)); |
248 __ j(above_equal, &ok, taken, Label::kNear); | 248 __ j(above_equal, &ok, Label::kNear); |
249 StackCheckStub stub; | 249 StackCheckStub stub; |
250 __ CallStub(&stub); | 250 __ CallStub(&stub); |
251 __ bind(&ok); | 251 __ bind(&ok); |
252 } | 252 } |
253 | 253 |
254 { Comment cmnt(masm_, "[ Body"); | 254 { Comment cmnt(masm_, "[ Body"); |
255 ASSERT(loop_depth() == 0); | 255 ASSERT(loop_depth() == 0); |
256 VisitStatements(function()->body()); | 256 VisitStatements(function()->body()); |
257 ASSERT(loop_depth() == 0); | 257 ASSERT(loop_depth() == 0); |
258 } | 258 } |
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271 __ Set(eax, Immediate(Smi::FromInt(0))); | 271 __ Set(eax, Immediate(Smi::FromInt(0))); |
272 } | 272 } |
273 | 273 |
274 | 274 |
275 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt) { | 275 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt) { |
276 Comment cmnt(masm_, "[ Stack check"); | 276 Comment cmnt(masm_, "[ Stack check"); |
277 Label ok; | 277 Label ok; |
278 ExternalReference stack_limit = | 278 ExternalReference stack_limit = |
279 ExternalReference::address_of_stack_limit(isolate()); | 279 ExternalReference::address_of_stack_limit(isolate()); |
280 __ cmp(esp, Operand::StaticVariable(stack_limit)); | 280 __ cmp(esp, Operand::StaticVariable(stack_limit)); |
281 __ j(above_equal, &ok, taken, Label::kNear); | 281 __ j(above_equal, &ok, Label::kNear); |
282 StackCheckStub stub; | 282 StackCheckStub stub; |
283 __ CallStub(&stub); | 283 __ CallStub(&stub); |
284 // Record a mapping of this PC offset to the OSR id. This is used to find | 284 // Record a mapping of this PC offset to the OSR id. This is used to find |
285 // the AST id from the unoptimized code in order to use it as a key into | 285 // the AST id from the unoptimized code in order to use it as a key into |
286 // the deoptimization input data found in the optimized code. | 286 // the deoptimization input data found in the optimized code. |
287 RecordStackCheck(stmt->OsrEntryId()); | 287 RecordStackCheck(stmt->OsrEntryId()); |
288 | 288 |
289 // Loop stack checks can be patched to perform on-stack replacement. In | 289 // Loop stack checks can be patched to perform on-stack replacement. In |
290 // order to decide whether or not to perform OSR we embed the loop depth | 290 // order to decide whether or not to perform OSR we embed the loop depth |
291 // in a test instruction after the call so we can extract it from the OSR | 291 // in a test instruction after the call so we can extract it from the OSR |
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1718 break; | 1718 break; |
1719 case Token::SUB: | 1719 case Token::SUB: |
1720 __ sub(eax, Operand(ecx)); | 1720 __ sub(eax, Operand(ecx)); |
1721 __ j(overflow, &stub_call); | 1721 __ j(overflow, &stub_call); |
1722 break; | 1722 break; |
1723 case Token::MUL: { | 1723 case Token::MUL: { |
1724 __ SmiUntag(eax); | 1724 __ SmiUntag(eax); |
1725 __ imul(eax, Operand(ecx)); | 1725 __ imul(eax, Operand(ecx)); |
1726 __ j(overflow, &stub_call); | 1726 __ j(overflow, &stub_call); |
1727 __ test(eax, Operand(eax)); | 1727 __ test(eax, Operand(eax)); |
1728 __ j(not_zero, &done, taken, Label::kNear); | 1728 __ j(not_zero, &done, Label::kNear); |
1729 __ mov(ebx, edx); | 1729 __ mov(ebx, edx); |
1730 __ or_(ebx, Operand(ecx)); | 1730 __ or_(ebx, Operand(ecx)); |
1731 __ j(negative, &stub_call); | 1731 __ j(negative, &stub_call); |
1732 break; | 1732 break; |
1733 } | 1733 } |
1734 case Token::BIT_OR: | 1734 case Token::BIT_OR: |
1735 __ or_(eax, Operand(ecx)); | 1735 __ or_(eax, Operand(ecx)); |
1736 break; | 1736 break; |
1737 case Token::BIT_AND: | 1737 case Token::BIT_AND: |
1738 __ and_(eax, Operand(ecx)); | 1738 __ and_(eax, Operand(ecx)); |
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4322 // And return. | 4322 // And return. |
4323 __ ret(0); | 4323 __ ret(0); |
4324 } | 4324 } |
4325 | 4325 |
4326 | 4326 |
4327 #undef __ | 4327 #undef __ |
4328 | 4328 |
4329 } } // namespace v8::internal | 4329 } } // namespace v8::internal |
4330 | 4330 |
4331 #endif // V8_TARGET_ARCH_IA32 | 4331 #endif // V8_TARGET_ARCH_IA32 |
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