christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 Google Inc. All Rights Reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "bootstrapper.h" |
| 31 | #include "codegen-inl.h" |
| 32 | #include "debug.h" |
| 33 | #include "prettyprinter.h" |
| 34 | #include "scopeinfo.h" |
| 35 | #include "scopes.h" |
| 36 | #include "runtime.h" |
| 37 | |
| 38 | namespace v8 { namespace internal { |
| 39 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 40 | DEFINE_bool(trace, false, "trace function calls"); |
| 41 | DECLARE_bool(debug_info); |
| 42 | DECLARE_bool(debug_code); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 43 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 44 | #ifdef ENABLE_DISASSEMBLER |
| 45 | DEFINE_bool(print_code, false, "print generated code"); |
| 46 | #endif |
| 47 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 48 | #ifdef DEBUG |
| 49 | DECLARE_bool(gc_greedy); |
| 50 | DEFINE_bool(trace_codegen, false, |
| 51 | "print name of functions for which code is generated"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 52 | DEFINE_bool(print_builtin_code, false, "print generated code for builtins"); |
| 53 | DEFINE_bool(print_source, false, "pretty print source code"); |
| 54 | DEFINE_bool(print_builtin_source, false, |
| 55 | "pretty print source code for builtins"); |
| 56 | DEFINE_bool(print_ast, false, "print source AST"); |
| 57 | DEFINE_bool(print_builtin_ast, false, "print source AST for builtins"); |
| 58 | DEFINE_bool(trace_calls, false, "trace calls"); |
| 59 | DEFINE_bool(trace_builtin_calls, false, "trace builtins calls"); |
| 60 | DEFINE_string(stop_at, "", "function name where to insert a breakpoint"); |
| 61 | #endif // DEBUG |
| 62 | |
| 63 | |
| 64 | DEFINE_bool(check_stack, true, |
| 65 | "check stack for overflow, interrupt, breakpoint"); |
| 66 | |
| 67 | |
| 68 | class ArmCodeGenerator; |
| 69 | |
| 70 | |
| 71 | // ----------------------------------------------------------------------------- |
| 72 | // Reference support |
| 73 | |
| 74 | // A reference is a C++ stack-allocated object that keeps an ECMA |
| 75 | // reference on the execution stack while in scope. For variables |
| 76 | // the reference is empty, indicating that it isn't necessary to |
| 77 | // store state on the stack for keeping track of references to those. |
| 78 | // For properties, we keep either one (named) or two (indexed) values |
| 79 | // on the execution stack to represent the reference. |
| 80 | |
| 81 | class Reference BASE_EMBEDDED { |
| 82 | public: |
| 83 | enum Type { ILLEGAL = -1, EMPTY = 0, NAMED = 1, KEYED = 2 }; |
| 84 | Reference(ArmCodeGenerator* cgen, Expression* expression); |
| 85 | ~Reference(); |
| 86 | |
| 87 | Expression* expression() const { return expression_; } |
| 88 | Type type() const { return type_; } |
| 89 | void set_type(Type value) { |
| 90 | ASSERT(type_ == ILLEGAL); |
| 91 | type_ = value; |
| 92 | } |
| 93 | int size() const { return type_; } |
| 94 | |
| 95 | bool is_illegal() const { return type_ == ILLEGAL; } |
| 96 | |
| 97 | private: |
| 98 | ArmCodeGenerator* cgen_; |
| 99 | Expression* expression_; |
| 100 | Type type_; |
| 101 | }; |
| 102 | |
| 103 | |
| 104 | // ----------------------------------------------------------------------------- |
| 105 | // Code generation state |
| 106 | |
| 107 | class CodeGenState BASE_EMBEDDED { |
| 108 | public: |
| 109 | enum AccessType { |
| 110 | UNDEFINED, |
| 111 | LOAD, |
| 112 | LOAD_TYPEOF_EXPR, |
| 113 | STORE, |
| 114 | INIT_CONST |
| 115 | }; |
| 116 | |
| 117 | CodeGenState() |
| 118 | : access_(UNDEFINED), |
| 119 | ref_(NULL), |
| 120 | true_target_(NULL), |
| 121 | false_target_(NULL) { |
| 122 | } |
| 123 | |
| 124 | CodeGenState(AccessType access, |
| 125 | Reference* ref, |
| 126 | Label* true_target, |
| 127 | Label* false_target) |
| 128 | : access_(access), |
| 129 | ref_(ref), |
| 130 | true_target_(true_target), |
| 131 | false_target_(false_target) { |
| 132 | } |
| 133 | |
| 134 | AccessType access() const { return access_; } |
| 135 | Reference* ref() const { return ref_; } |
| 136 | Label* true_target() const { return true_target_; } |
| 137 | Label* false_target() const { return false_target_; } |
| 138 | |
| 139 | private: |
| 140 | AccessType access_; |
| 141 | Reference* ref_; |
| 142 | Label* true_target_; |
| 143 | Label* false_target_; |
| 144 | }; |
| 145 | |
| 146 | |
| 147 | // ----------------------------------------------------------------------------- |
| 148 | // ArmCodeGenerator |
| 149 | |
| 150 | class ArmCodeGenerator: public CodeGenerator { |
| 151 | public: |
| 152 | static Handle<Code> MakeCode(FunctionLiteral* fun, |
| 153 | Handle<Script> script, |
| 154 | bool is_eval); |
| 155 | |
| 156 | MacroAssembler* masm() { return masm_; } |
| 157 | |
| 158 | private: |
| 159 | // Assembler |
| 160 | MacroAssembler* masm_; // to generate code |
| 161 | |
| 162 | // Code generation state |
| 163 | Scope* scope_; |
| 164 | Condition cc_reg_; |
| 165 | CodeGenState* state_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 166 | int break_stack_height_; |
| 167 | |
| 168 | // Labels |
| 169 | Label function_return_; |
| 170 | |
| 171 | // Construction/destruction |
| 172 | ArmCodeGenerator(int buffer_size, |
| 173 | Handle<Script> script, |
| 174 | bool is_eval); |
| 175 | |
| 176 | virtual ~ArmCodeGenerator() { delete masm_; } |
| 177 | |
| 178 | // Main code generation function |
| 179 | void GenCode(FunctionLiteral* fun); |
| 180 | |
| 181 | // The following are used by class Reference. |
| 182 | void LoadReference(Reference* ref); |
| 183 | void UnloadReference(Reference* ref); |
| 184 | friend class Reference; |
| 185 | |
| 186 | // State |
| 187 | bool has_cc() const { return cc_reg_ != al; } |
| 188 | CodeGenState::AccessType access() const { return state_->access(); } |
| 189 | Reference* ref() const { return state_->ref(); } |
| 190 | bool is_referenced() const { return state_->ref() != NULL; } |
| 191 | Label* true_target() const { return state_->true_target(); } |
| 192 | Label* false_target() const { return state_->false_target(); } |
| 193 | |
| 194 | |
| 195 | // Expressions |
| 196 | MemOperand GlobalObject() const { |
| 197 | return ContextOperand(cp, Context::GLOBAL_INDEX); |
| 198 | } |
| 199 | |
| 200 | MemOperand ContextOperand(Register context, int index) const { |
| 201 | return MemOperand(context, Context::SlotOffset(index)); |
| 202 | } |
| 203 | |
| 204 | MemOperand ParameterOperand(int index) const { |
| 205 | // index -2 corresponds to the activated closure, -1 corresponds |
| 206 | // to the receiver |
| 207 | ASSERT(-2 <= index && index < scope_->num_parameters()); |
| 208 | int offset = JavaScriptFrameConstants::kParam0Offset - index * kPointerSize; |
| 209 | return MemOperand(pp, offset); |
| 210 | } |
| 211 | |
| 212 | MemOperand FunctionOperand() const { return ParameterOperand(-2); } |
| 213 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 214 | MemOperand SlotOperand(Slot* slot, Register tmp); |
| 215 | |
| 216 | void LoadCondition(Expression* x, CodeGenState::AccessType access, |
| 217 | Label* true_target, Label* false_target, bool force_cc); |
| 218 | void Load(Expression* x, |
| 219 | CodeGenState::AccessType access = CodeGenState::LOAD); |
| 220 | void LoadGlobal(); |
| 221 | |
| 222 | // Special code for typeof expressions: Unfortunately, we must |
| 223 | // be careful when loading the expression in 'typeof' |
| 224 | // expressions. We are not allowed to throw reference errors for |
| 225 | // non-existing properties of the global object, so we must make it |
| 226 | // look like an explicit property access, instead of an access |
| 227 | // through the context chain. |
| 228 | void LoadTypeofExpression(Expression* x); |
| 229 | |
| 230 | // References |
| 231 | void AccessReference(Reference* ref, CodeGenState::AccessType access); |
| 232 | |
| 233 | void GetValue(Reference* ref) { AccessReference(ref, CodeGenState::LOAD); } |
| 234 | void SetValue(Reference* ref) { AccessReference(ref, CodeGenState::STORE); } |
| 235 | void InitConst(Reference* ref) { |
| 236 | AccessReference(ref, CodeGenState::INIT_CONST); |
| 237 | } |
| 238 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 239 | void ToBoolean(Label* true_target, Label* false_target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 240 | |
| 241 | |
| 242 | // Access property from the reference (must be at the TOS). |
| 243 | void AccessReferenceProperty(Expression* key, |
| 244 | CodeGenState::AccessType access); |
| 245 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 246 | void GenericBinaryOperation(Token::Value op); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 247 | void Comparison(Condition cc, bool strict = false); |
| 248 | |
| 249 | void SmiOperation(Token::Value op, Handle<Object> value, bool reversed); |
| 250 | |
| 251 | void CallWithArguments(ZoneList<Expression*>* arguments, int position); |
| 252 | |
| 253 | // Declare global variables and functions in the given array of |
| 254 | // name/value pairs. |
| 255 | virtual void DeclareGlobals(Handle<FixedArray> pairs); |
| 256 | |
| 257 | // Instantiate the function boilerplate. |
| 258 | void InstantiateBoilerplate(Handle<JSFunction> boilerplate); |
| 259 | |
| 260 | // Control flow |
| 261 | void Branch(bool if_true, Label* L); |
| 262 | void CheckStack(); |
| 263 | void CleanStack(int num_bytes); |
| 264 | |
| 265 | // Node visitors |
| 266 | #define DEF_VISIT(type) \ |
| 267 | virtual void Visit##type(type* node); |
| 268 | NODE_LIST(DEF_VISIT) |
| 269 | #undef DEF_VISIT |
| 270 | |
| 271 | void RecordStatementPosition(Node* node); |
| 272 | |
| 273 | // Activation frames |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 274 | void EnterJSFrame(int argc); // preserves r1 |
| 275 | void ExitJSFrame(ExitJSFlag flag = RETURN); // preserves r0-r2 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 276 | |
| 277 | virtual void GenerateShiftDownAndTailCall(ZoneList<Expression*>* args); |
| 278 | virtual void GenerateSetThisFunction(ZoneList<Expression*>* args); |
| 279 | virtual void GenerateGetThisFunction(ZoneList<Expression*>* args); |
| 280 | virtual void GenerateSetThis(ZoneList<Expression*>* args); |
| 281 | virtual void GenerateGetArgumentsLength(ZoneList<Expression*>* args); |
| 282 | virtual void GenerateSetArgumentsLength(ZoneList<Expression*>* args); |
| 283 | virtual void GenerateTailCallWithArguments(ZoneList<Expression*>* args); |
| 284 | virtual void GenerateSetArgument(ZoneList<Expression*>* args); |
| 285 | virtual void GenerateSquashFrame(ZoneList<Expression*>* args); |
| 286 | virtual void GenerateExpandFrame(ZoneList<Expression*>* args); |
| 287 | virtual void GenerateIsSmi(ZoneList<Expression*>* args); |
| 288 | virtual void GenerateIsArray(ZoneList<Expression*>* args); |
| 289 | |
| 290 | virtual void GenerateArgumentsLength(ZoneList<Expression*>* args); |
| 291 | virtual void GenerateArgumentsAccess(ZoneList<Expression*>* args); |
| 292 | |
| 293 | virtual void GenerateValueOf(ZoneList<Expression*>* args); |
| 294 | virtual void GenerateSetValueOf(ZoneList<Expression*>* args); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 295 | |
| 296 | virtual void GenerateFastCharCodeAt(ZoneList<Expression*>* args); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 297 | }; |
| 298 | |
| 299 | |
| 300 | // ----------------------------------------------------------------------------- |
| 301 | // ArmCodeGenerator implementation |
| 302 | |
| 303 | #define __ masm_-> |
| 304 | |
| 305 | |
| 306 | Handle<Code> ArmCodeGenerator::MakeCode(FunctionLiteral* flit, |
| 307 | Handle<Script> script, |
| 308 | bool is_eval) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 309 | #ifdef ENABLE_DISASSEMBLER |
| 310 | bool print_code = FLAG_print_code && !Bootstrapper::IsActive(); |
| 311 | #endif // ENABLE_DISASSEMBLER |
| 312 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 313 | #ifdef DEBUG |
| 314 | bool print_source = false; |
| 315 | bool print_ast = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 316 | const char* ftype; |
| 317 | |
| 318 | if (Bootstrapper::IsActive()) { |
| 319 | print_source = FLAG_print_builtin_source; |
| 320 | print_ast = FLAG_print_builtin_ast; |
| 321 | print_code = FLAG_print_builtin_code; |
| 322 | ftype = "builtin"; |
| 323 | } else { |
| 324 | print_source = FLAG_print_source; |
| 325 | print_ast = FLAG_print_ast; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 326 | ftype = "user-defined"; |
| 327 | } |
| 328 | |
| 329 | if (FLAG_trace_codegen || print_source || print_ast) { |
| 330 | PrintF("*** Generate code for %s function: ", ftype); |
| 331 | flit->name()->ShortPrint(); |
| 332 | PrintF(" ***\n"); |
| 333 | } |
| 334 | |
| 335 | if (print_source) { |
| 336 | PrintF("--- Source from AST ---\n%s\n", PrettyPrinter().PrintProgram(flit)); |
| 337 | } |
| 338 | |
| 339 | if (print_ast) { |
| 340 | PrintF("--- AST ---\n%s\n", AstPrinter().PrintProgram(flit)); |
| 341 | } |
| 342 | #endif // DEBUG |
| 343 | |
| 344 | // Generate code. |
| 345 | const int initial_buffer_size = 4 * KB; |
| 346 | ArmCodeGenerator cgen(initial_buffer_size, script, is_eval); |
| 347 | cgen.GenCode(flit); |
| 348 | if (cgen.HasStackOverflow()) { |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 349 | ASSERT(!Top::has_pending_exception()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 350 | return Handle<Code>::null(); |
| 351 | } |
| 352 | |
| 353 | // Process any deferred code. |
| 354 | cgen.ProcessDeferred(); |
| 355 | |
| 356 | // Allocate and install the code. |
| 357 | CodeDesc desc; |
| 358 | cgen.masm()->GetCode(&desc); |
| 359 | ScopeInfo<> sinfo(flit->scope()); |
| 360 | Code::Flags flags = Code::ComputeFlags(Code::FUNCTION); |
| 361 | Handle<Code> code = Factory::NewCode(desc, &sinfo, flags); |
| 362 | |
| 363 | // Add unresolved entries in the code to the fixup list. |
| 364 | Bootstrapper::AddFixup(*code, cgen.masm()); |
| 365 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 366 | #ifdef ENABLE_DISASSEMBLER |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 367 | if (print_code) { |
| 368 | // Print the source code if available. |
| 369 | if (!script->IsUndefined() && !script->source()->IsUndefined()) { |
| 370 | PrintF("--- Raw source ---\n"); |
| 371 | StringInputBuffer stream(String::cast(script->source())); |
| 372 | stream.Seek(flit->start_position()); |
| 373 | // flit->end_position() points to the last character in the stream. We |
| 374 | // need to compensate by adding one to calculate the length. |
| 375 | int source_len = flit->end_position() - flit->start_position() + 1; |
| 376 | for (int i = 0; i < source_len; i++) { |
| 377 | if (stream.has_more()) PrintF("%c", stream.GetNext()); |
| 378 | } |
| 379 | PrintF("\n\n"); |
| 380 | } |
| 381 | PrintF("--- Code ---\n"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 382 | code->Disassemble(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 383 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 384 | #endif // ENABLE_DISASSEMBLER |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 385 | |
| 386 | return code; |
| 387 | } |
| 388 | |
| 389 | |
| 390 | ArmCodeGenerator::ArmCodeGenerator(int buffer_size, |
| 391 | Handle<Script> script, |
| 392 | bool is_eval) |
| 393 | : CodeGenerator(is_eval, script), |
| 394 | masm_(new MacroAssembler(NULL, buffer_size)), |
| 395 | scope_(NULL), |
| 396 | cc_reg_(al), |
| 397 | state_(NULL), |
| 398 | break_stack_height_(0) { |
| 399 | } |
| 400 | |
| 401 | |
| 402 | // Calling conventions: |
| 403 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 404 | // r0: the number of arguments |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 405 | // fp: frame pointer |
| 406 | // sp: stack pointer |
| 407 | // pp: caller's parameter pointer |
| 408 | // cp: callee's context |
| 409 | |
| 410 | void ArmCodeGenerator::GenCode(FunctionLiteral* fun) { |
| 411 | Scope* scope = fun->scope(); |
| 412 | ZoneList<Statement*>* body = fun->body(); |
| 413 | |
| 414 | // Initialize state. |
| 415 | { CodeGenState state; |
| 416 | state_ = &state; |
| 417 | scope_ = scope; |
| 418 | cc_reg_ = al; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 419 | |
| 420 | // Entry |
| 421 | // stack: function, receiver, arguments, return address |
| 422 | // r0: number of arguments |
| 423 | // sp: stack pointer |
| 424 | // fp: frame pointer |
| 425 | // pp: caller's parameter pointer |
| 426 | // cp: callee's context |
| 427 | |
| 428 | { Comment cmnt(masm_, "[ enter JS frame"); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 429 | EnterJSFrame(scope->num_parameters()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 430 | } |
| 431 | // tos: code slot |
| 432 | #ifdef DEBUG |
| 433 | if (strlen(FLAG_stop_at) > 0 && |
| 434 | fun->name()->IsEqualTo(CStrVector(FLAG_stop_at))) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 435 | __ stop("stop-at"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 436 | } |
| 437 | #endif |
| 438 | |
| 439 | // Allocate space for locals and initialize them. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 440 | if (scope->num_stack_slots() > 0) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 441 | Comment cmnt(masm_, "[ allocate space for locals"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 442 | // Initialize stack slots with 'undefined' value. |
| 443 | __ mov(ip, Operand(Factory::undefined_value())); |
| 444 | for (int i = 0; i < scope->num_stack_slots(); i++) { |
| 445 | __ push(ip); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 446 | } |
| 447 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 448 | |
| 449 | if (scope->num_heap_slots() > 0) { |
| 450 | // Allocate local context. |
| 451 | // Get outer context and create a new context based on it. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 452 | __ ldr(r0, FunctionOperand()); |
| 453 | __ push(r0); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 454 | __ CallRuntime(Runtime::kNewContext, 1); // r0 holds the result |
| 455 | |
| 456 | if (kDebug) { |
| 457 | Label verified_true; |
| 458 | __ cmp(r0, Operand(cp)); |
| 459 | __ b(eq, &verified_true); |
| 460 | __ stop("NewContext: r0 is expected to be the same as cp"); |
| 461 | __ bind(&verified_true); |
| 462 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 463 | // Update context local. |
| 464 | __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 465 | } |
| 466 | |
| 467 | // TODO(1241774): Improve this code!!! |
| 468 | // 1) only needed if we have a context |
| 469 | // 2) no need to recompute context ptr every single time |
| 470 | // 3) don't copy parameter operand code from SlotOperand! |
| 471 | { |
| 472 | Comment cmnt2(masm_, "[ copy context parameters into .context"); |
| 473 | |
| 474 | // Note that iteration order is relevant here! If we have the same |
| 475 | // parameter twice (e.g., function (x, y, x)), and that parameter |
| 476 | // needs to be copied into the context, it must be the last argument |
| 477 | // passed to the parameter that needs to be copied. This is a rare |
| 478 | // case so we don't check for it, instead we rely on the copying |
| 479 | // order: such a parameter is copied repeatedly into the same |
| 480 | // context location and thus the last value is what is seen inside |
| 481 | // the function. |
| 482 | for (int i = 0; i < scope->num_parameters(); i++) { |
| 483 | Variable* par = scope->parameter(i); |
| 484 | Slot* slot = par->slot(); |
| 485 | if (slot != NULL && slot->type() == Slot::CONTEXT) { |
| 486 | ASSERT(!scope->is_global_scope()); // no parameters in global scope |
| 487 | int parameter_offset = |
| 488 | JavaScriptFrameConstants::kParam0Offset - i * kPointerSize; |
| 489 | __ ldr(r1, MemOperand(pp, parameter_offset)); |
| 490 | // Loads r2 with context; used below in RecordWrite. |
| 491 | __ str(r1, SlotOperand(slot, r2)); |
| 492 | // Load the offset into r3. |
| 493 | int slot_offset = |
| 494 | FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| 495 | __ mov(r3, Operand(slot_offset)); |
| 496 | __ RecordWrite(r2, r3, r1); |
| 497 | } |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | // Store the arguments object. |
| 502 | // This must happen after context initialization because |
| 503 | // the arguments array may be stored in the context! |
| 504 | if (scope->arguments() != NULL) { |
| 505 | ASSERT(scope->arguments_shadow() != NULL); |
| 506 | Comment cmnt(masm_, "[ allocate arguments object"); |
| 507 | { |
| 508 | Reference target(this, scope->arguments()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 509 | __ ldr(r0, FunctionOperand()); |
| 510 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 511 | __ CallRuntime(Runtime::kNewArguments, 1); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 512 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 513 | SetValue(&target); |
| 514 | } |
| 515 | // The value of arguments must also be stored in .arguments. |
| 516 | // TODO(1241813): This code can probably be improved by fusing it with |
| 517 | // the code that stores the arguments object above. |
| 518 | { |
| 519 | Reference target(this, scope->arguments_shadow()); |
| 520 | Load(scope->arguments()); |
| 521 | SetValue(&target); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | // Generate code to 'execute' declarations and initialize |
| 526 | // functions (source elements). In case of an illegal |
| 527 | // redeclaration we need to handle that instead of processing the |
| 528 | // declarations. |
| 529 | if (scope->HasIllegalRedeclaration()) { |
| 530 | Comment cmnt(masm_, "[ illegal redeclarations"); |
| 531 | scope->VisitIllegalRedeclaration(this); |
| 532 | } else { |
| 533 | Comment cmnt(masm_, "[ declarations"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 534 | // ProcessDeclarations calls DeclareGlobals indirectly |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 535 | ProcessDeclarations(scope->declarations()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 536 | |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 537 | // Bail out if a stack-overflow exception occured when |
| 538 | // processing declarations. |
| 539 | if (HasStackOverflow()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 540 | } |
| 541 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 542 | if (FLAG_trace) { |
| 543 | // Push a valid value as the parameter. The runtime call only uses |
| 544 | // it as the return value to indicate non-failure. |
| 545 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 546 | __ push(r0); |
| 547 | __ CallRuntime(Runtime::kTraceEnter, 1); |
| 548 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 549 | CheckStack(); |
| 550 | |
| 551 | // Compile the body of the function in a vanilla state. Don't |
| 552 | // bother compiling all the code if the scope has an illegal |
| 553 | // redeclaration. |
| 554 | if (!scope->HasIllegalRedeclaration()) { |
| 555 | Comment cmnt(masm_, "[ function body"); |
| 556 | #ifdef DEBUG |
| 557 | bool is_builtin = Bootstrapper::IsActive(); |
| 558 | bool should_trace = |
| 559 | is_builtin ? FLAG_trace_builtin_calls : FLAG_trace_calls; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 560 | if (should_trace) { |
| 561 | // Push a valid value as the parameter. The runtime call only uses |
| 562 | // it as the return value to indicate non-failure. |
| 563 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 564 | __ push(r0); |
| 565 | __ CallRuntime(Runtime::kDebugTrace, 1); |
| 566 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 567 | #endif |
| 568 | VisitStatements(body); |
| 569 | } |
| 570 | |
| 571 | state_ = NULL; |
| 572 | } |
| 573 | |
| 574 | // exit |
| 575 | // r0: result |
| 576 | // sp: stack pointer |
| 577 | // fp: frame pointer |
| 578 | // pp: parameter pointer |
| 579 | // cp: callee's context |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 580 | __ mov(r0, Operand(Factory::undefined_value())); |
| 581 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 582 | __ bind(&function_return_); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 583 | if (FLAG_trace) { |
| 584 | // Push the return value on the stack as the parameter. |
| 585 | // Runtime::TraceExit returns the parameter as it is. |
| 586 | __ push(r0); |
| 587 | __ CallRuntime(Runtime::kTraceExit, 1); |
| 588 | } |
| 589 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 590 | ExitJSFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 591 | |
| 592 | // Code generation state must be reset. |
| 593 | scope_ = NULL; |
| 594 | ASSERT(!has_cc()); |
| 595 | ASSERT(state_ == NULL); |
| 596 | } |
| 597 | |
| 598 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 599 | MemOperand ArmCodeGenerator::SlotOperand(Slot* slot, Register tmp) { |
| 600 | // Currently, this assertion will fail if we try to assign to |
| 601 | // a constant variable that is constant because it is read-only |
| 602 | // (such as the variable referring to a named function expression). |
| 603 | // We need to implement assignments to read-only variables. |
| 604 | // Ideally, we should do this during AST generation (by converting |
| 605 | // such assignments into expression statements); however, in general |
| 606 | // we may not be able to make the decision until past AST generation, |
| 607 | // that is when the entire program is known. |
| 608 | ASSERT(slot != NULL); |
| 609 | int index = slot->index(); |
| 610 | switch (slot->type()) { |
| 611 | case Slot::PARAMETER: |
| 612 | return ParameterOperand(index); |
| 613 | |
| 614 | case Slot::LOCAL: { |
| 615 | ASSERT(0 <= index && |
| 616 | index < scope_->num_stack_slots() && |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 617 | index >= 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 618 | int local_offset = JavaScriptFrameConstants::kLocal0Offset - |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 619 | index * kPointerSize; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 620 | return MemOperand(fp, local_offset); |
| 621 | } |
| 622 | |
| 623 | case Slot::CONTEXT: { |
| 624 | // Follow the context chain if necessary. |
| 625 | ASSERT(!tmp.is(cp)); // do not overwrite context register |
| 626 | Register context = cp; |
| 627 | int chain_length = scope_->ContextChainLength(slot->var()->scope()); |
| 628 | for (int i = chain_length; i-- > 0;) { |
| 629 | // Load the closure. |
| 630 | // (All contexts, even 'with' contexts, have a closure, |
| 631 | // and it is the same for all contexts inside a function. |
| 632 | // There is no need to go to the function context first.) |
| 633 | __ ldr(tmp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| 634 | // Load the function context (which is the incoming, outer context). |
| 635 | __ ldr(tmp, FieldMemOperand(tmp, JSFunction::kContextOffset)); |
| 636 | context = tmp; |
| 637 | } |
| 638 | // We may have a 'with' context now. Get the function context. |
| 639 | // (In fact this mov may never be the needed, since the scope analysis |
| 640 | // may not permit a direct context access in this case and thus we are |
| 641 | // always at a function context. However it is safe to dereference be- |
| 642 | // cause the function context of a function context is itself. Before |
| 643 | // deleting this mov we should try to create a counter-example first, |
| 644 | // though...) |
| 645 | __ ldr(tmp, ContextOperand(context, Context::FCONTEXT_INDEX)); |
| 646 | return ContextOperand(tmp, index); |
| 647 | } |
| 648 | |
| 649 | default: |
| 650 | UNREACHABLE(); |
| 651 | return MemOperand(r0, 0); |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 656 | // Loads a value on the stack. If it is a boolean value, the result may have |
| 657 | // been (partially) translated into branches, or it may have set the condition |
| 658 | // code register. If force_cc is set, the value is forced to set the condition |
| 659 | // code register and no value is pushed. If the condition code register was set, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 660 | // has_cc() is true and cc_reg_ contains the condition to test for 'true'. |
| 661 | void ArmCodeGenerator::LoadCondition(Expression* x, |
| 662 | CodeGenState::AccessType access, |
| 663 | Label* true_target, |
| 664 | Label* false_target, |
| 665 | bool force_cc) { |
| 666 | ASSERT(access == CodeGenState::LOAD || |
| 667 | access == CodeGenState::LOAD_TYPEOF_EXPR); |
| 668 | ASSERT(!has_cc() && !is_referenced()); |
| 669 | |
| 670 | CodeGenState* old_state = state_; |
| 671 | CodeGenState new_state(access, NULL, true_target, false_target); |
| 672 | state_ = &new_state; |
| 673 | Visit(x); |
| 674 | state_ = old_state; |
| 675 | if (force_cc && !has_cc()) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 676 | // Convert the TOS value to a boolean in the condition code register. |
| 677 | ToBoolean(true_target, false_target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 678 | } |
| 679 | ASSERT(has_cc() || !force_cc); |
| 680 | } |
| 681 | |
| 682 | |
| 683 | void ArmCodeGenerator::Load(Expression* x, CodeGenState::AccessType access) { |
| 684 | ASSERT(access == CodeGenState::LOAD || |
| 685 | access == CodeGenState::LOAD_TYPEOF_EXPR); |
| 686 | |
| 687 | Label true_target; |
| 688 | Label false_target; |
| 689 | LoadCondition(x, access, &true_target, &false_target, false); |
| 690 | |
| 691 | if (has_cc()) { |
| 692 | // convert cc_reg_ into a bool |
| 693 | Label loaded, materialize_true; |
| 694 | __ b(cc_reg_, &materialize_true); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 695 | __ mov(r0, Operand(Factory::false_value())); |
| 696 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 697 | __ b(&loaded); |
| 698 | __ bind(&materialize_true); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 699 | __ mov(r0, Operand(Factory::true_value())); |
| 700 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 701 | __ bind(&loaded); |
| 702 | cc_reg_ = al; |
| 703 | } |
| 704 | |
| 705 | if (true_target.is_linked() || false_target.is_linked()) { |
| 706 | // we have at least one condition value |
| 707 | // that has been "translated" into a branch, |
| 708 | // thus it needs to be loaded explicitly again |
| 709 | Label loaded; |
| 710 | __ b(&loaded); // don't lose current TOS |
| 711 | bool both = true_target.is_linked() && false_target.is_linked(); |
| 712 | // reincarnate "true", if necessary |
| 713 | if (true_target.is_linked()) { |
| 714 | __ bind(&true_target); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 715 | __ mov(r0, Operand(Factory::true_value())); |
| 716 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 717 | } |
| 718 | // if both "true" and "false" need to be reincarnated, |
| 719 | // jump across code for "false" |
| 720 | if (both) |
| 721 | __ b(&loaded); |
| 722 | // reincarnate "false", if necessary |
| 723 | if (false_target.is_linked()) { |
| 724 | __ bind(&false_target); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 725 | __ mov(r0, Operand(Factory::false_value())); |
| 726 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 727 | } |
| 728 | // everything is loaded at this point |
| 729 | __ bind(&loaded); |
| 730 | } |
| 731 | ASSERT(!has_cc()); |
| 732 | } |
| 733 | |
| 734 | |
| 735 | void ArmCodeGenerator::LoadGlobal() { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 736 | __ ldr(r0, GlobalObject()); |
| 737 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | |
| 741 | // TODO(1241834): Get rid of this function in favor of just using Load, now |
| 742 | // that we have the LOAD_TYPEOF_EXPR access type. => Need to handle |
| 743 | // global variables w/o reference errors elsewhere. |
| 744 | void ArmCodeGenerator::LoadTypeofExpression(Expression* x) { |
| 745 | Variable* variable = x->AsVariableProxy()->AsVariable(); |
| 746 | if (variable != NULL && !variable->is_this() && variable->is_global()) { |
| 747 | // NOTE: This is somewhat nasty. We force the compiler to load |
| 748 | // the variable as if through '<global>.<variable>' to make sure we |
| 749 | // do not get reference errors. |
| 750 | Slot global(variable, Slot::CONTEXT, Context::GLOBAL_INDEX); |
| 751 | Literal key(variable->name()); |
| 752 | // TODO(1241834): Fetch the position from the variable instead of using |
| 753 | // no position. |
| 754 | Property property(&global, &key, kNoPosition); |
| 755 | Load(&property); |
| 756 | } else { |
| 757 | Load(x, CodeGenState::LOAD_TYPEOF_EXPR); |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | |
| 762 | Reference::Reference(ArmCodeGenerator* cgen, Expression* expression) |
| 763 | : cgen_(cgen), expression_(expression), type_(ILLEGAL) { |
| 764 | cgen->LoadReference(this); |
| 765 | } |
| 766 | |
| 767 | |
| 768 | Reference::~Reference() { |
| 769 | cgen_->UnloadReference(this); |
| 770 | } |
| 771 | |
| 772 | |
| 773 | void ArmCodeGenerator::LoadReference(Reference* ref) { |
| 774 | Expression* e = ref->expression(); |
| 775 | Property* property = e->AsProperty(); |
| 776 | Variable* var = e->AsVariableProxy()->AsVariable(); |
| 777 | |
| 778 | if (property != NULL) { |
| 779 | Load(property->obj()); |
| 780 | // Used a named reference if the key is a literal symbol. |
| 781 | // We don't use a named reference if they key is a string that can be |
| 782 | // legally parsed as an integer. This is because, otherwise we don't |
| 783 | // get into the slow case code that handles [] on String objects. |
| 784 | Literal* literal = property->key()->AsLiteral(); |
| 785 | uint32_t dummy; |
| 786 | if (literal != NULL && literal->handle()->IsSymbol() && |
| 787 | !String::cast(*(literal->handle()))->AsArrayIndex(&dummy)) { |
| 788 | ref->set_type(Reference::NAMED); |
| 789 | } else { |
| 790 | Load(property->key()); |
| 791 | ref->set_type(Reference::KEYED); |
| 792 | } |
| 793 | } else if (var != NULL) { |
| 794 | if (var->is_global()) { |
| 795 | // global variable |
| 796 | LoadGlobal(); |
| 797 | ref->set_type(Reference::NAMED); |
| 798 | } else { |
| 799 | // local variable |
| 800 | ref->set_type(Reference::EMPTY); |
| 801 | } |
| 802 | } else { |
| 803 | Load(e); |
| 804 | __ CallRuntime(Runtime::kThrowReferenceError, 1); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 805 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 806 | } |
| 807 | } |
| 808 | |
| 809 | |
| 810 | void ArmCodeGenerator::UnloadReference(Reference* ref) { |
| 811 | int size = ref->size(); |
| 812 | if (size <= 0) { |
| 813 | // Do nothing. No popping is necessary. |
| 814 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 815 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 816 | __ add(sp, sp, Operand(size * kPointerSize)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 817 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 818 | } |
| 819 | } |
| 820 | |
| 821 | |
| 822 | void ArmCodeGenerator::AccessReference(Reference* ref, |
| 823 | CodeGenState::AccessType access) { |
| 824 | ASSERT(!has_cc()); |
| 825 | ASSERT(ref->type() != Reference::ILLEGAL); |
| 826 | CodeGenState* old_state = state_; |
| 827 | CodeGenState new_state(access, ref, true_target(), false_target()); |
| 828 | state_ = &new_state; |
| 829 | Visit(ref->expression()); |
| 830 | state_ = old_state; |
| 831 | } |
| 832 | |
| 833 | |
| 834 | // ECMA-262, section 9.2, page 30: ToBoolean(). Convert the given |
| 835 | // register to a boolean in the condition code register. The code |
| 836 | // may jump to 'false_target' in case the register converts to 'false'. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 837 | void ArmCodeGenerator::ToBoolean(Label* true_target, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 838 | Label* false_target) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 839 | // Note: The generated code snippet does not change stack variables. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 840 | // Only the condition code should be set. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 841 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 842 | |
| 843 | // Fast case checks |
| 844 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 845 | // Check if the value is 'false'. |
| 846 | __ cmp(r0, Operand(Factory::false_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 847 | __ b(eq, false_target); |
| 848 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 849 | // Check if the value is 'true'. |
| 850 | __ cmp(r0, Operand(Factory::true_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 851 | __ b(eq, true_target); |
| 852 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 853 | // Check if the value is 'undefined'. |
| 854 | __ cmp(r0, Operand(Factory::undefined_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 855 | __ b(eq, false_target); |
| 856 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 857 | // Check if the value is a smi. |
| 858 | __ cmp(r0, Operand(Smi::FromInt(0))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 859 | __ b(eq, false_target); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 860 | __ tst(r0, Operand(kSmiTagMask)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 861 | __ b(eq, true_target); |
| 862 | |
| 863 | // Slow case: call the runtime. |
| 864 | __ push(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 865 | __ CallRuntime(Runtime::kToBool, 1); |
| 866 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 867 | // Convert result (r0) to condition code |
| 868 | __ cmp(r0, Operand(Factory::false_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 869 | |
| 870 | cc_reg_ = ne; |
| 871 | } |
| 872 | |
| 873 | |
| 874 | #undef __ |
| 875 | #define __ masm-> |
| 876 | |
| 877 | |
| 878 | class GetPropertyStub : public CodeStub { |
| 879 | public: |
| 880 | GetPropertyStub() { } |
| 881 | |
| 882 | private: |
| 883 | Major MajorKey() { return GetProperty; } |
| 884 | int MinorKey() { return 0; } |
| 885 | void Generate(MacroAssembler* masm); |
| 886 | |
| 887 | const char* GetName() { return "GetPropertyStub"; } |
| 888 | }; |
| 889 | |
| 890 | |
| 891 | void GetPropertyStub::Generate(MacroAssembler* masm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 892 | // sp[0]: key |
| 893 | // sp[1]: receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 894 | Label slow, fast; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 895 | // Get the key and receiver object from the stack. |
| 896 | __ ldm(ia, sp, r0.bit() | r1.bit()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 897 | // Check that the key is a smi. |
| 898 | __ tst(r0, Operand(kSmiTagMask)); |
| 899 | __ b(ne, &slow); |
| 900 | __ mov(r0, Operand(r0, ASR, kSmiTagSize)); |
| 901 | // Check that the object isn't a smi. |
| 902 | __ tst(r1, Operand(kSmiTagMask)); |
| 903 | __ b(eq, &slow); |
| 904 | // Check that the object is some kind of JS object. |
| 905 | __ ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 906 | __ ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
| 907 | __ cmp(r2, Operand(JS_OBJECT_TYPE)); |
| 908 | __ b(lt, &slow); |
| 909 | |
| 910 | // Check if the object is a value-wrapper object. In that case we |
| 911 | // enter the runtime system to make sure that indexing into string |
| 912 | // objects work as intended. |
| 913 | __ cmp(r2, Operand(JS_VALUE_TYPE)); |
| 914 | __ b(eq, &slow); |
| 915 | |
| 916 | // Get the elements array of the object. |
| 917 | __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset)); |
| 918 | // Check that the object is in fast mode (not dictionary). |
| 919 | __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 920 | __ cmp(r3, Operand(Factory::hash_table_map())); |
| 921 | __ b(eq, &slow); |
| 922 | // Check that the key (index) is within bounds. |
| 923 | __ ldr(r3, FieldMemOperand(r1, Array::kLengthOffset)); |
| 924 | __ cmp(r0, Operand(r3)); |
| 925 | __ b(lo, &fast); |
| 926 | |
| 927 | // Slow case: Push extra copies of the arguments (2). |
| 928 | __ bind(&slow); |
| 929 | __ ldm(ia, sp, r0.bit() | r1.bit()); |
| 930 | __ stm(db_w, sp, r0.bit() | r1.bit()); |
| 931 | // Do tail-call to runtime routine. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 932 | __ TailCallRuntime(ExternalReference(Runtime::kGetProperty), 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 933 | |
| 934 | // Fast case: Do the load. |
| 935 | __ bind(&fast); |
| 936 | __ add(r3, r1, Operand(Array::kHeaderSize - kHeapObjectTag)); |
| 937 | __ ldr(r0, MemOperand(r3, r0, LSL, kPointerSizeLog2)); |
| 938 | __ cmp(r0, Operand(Factory::the_hole_value())); |
| 939 | // In case the loaded value is the_hole we have to consult GetProperty |
| 940 | // to ensure the prototype chain is searched. |
| 941 | __ b(eq, &slow); |
| 942 | |
| 943 | masm->StubReturn(1); |
| 944 | } |
| 945 | |
| 946 | |
| 947 | class SetPropertyStub : public CodeStub { |
| 948 | public: |
| 949 | SetPropertyStub() { } |
| 950 | |
| 951 | private: |
| 952 | Major MajorKey() { return SetProperty; } |
| 953 | int MinorKey() { return 0; } |
| 954 | void Generate(MacroAssembler* masm); |
| 955 | |
| 956 | const char* GetName() { return "GetPropertyStub"; } |
| 957 | }; |
| 958 | |
| 959 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 960 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 961 | void SetPropertyStub::Generate(MacroAssembler* masm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 962 | // r0 : value |
| 963 | // sp[0] : key |
| 964 | // sp[1] : receiver |
| 965 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 966 | Label slow, fast, array, extra, exit; |
| 967 | // Get the key and the object from the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 968 | __ ldm(ia, sp, r1.bit() | r3.bit()); // r1 = key, r3 = receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 969 | // Check that the key is a smi. |
| 970 | __ tst(r1, Operand(kSmiTagMask)); |
| 971 | __ b(ne, &slow); |
| 972 | // Check that the object isn't a smi. |
| 973 | __ tst(r3, Operand(kSmiTagMask)); |
| 974 | __ b(eq, &slow); |
| 975 | // Get the type of the object from its map. |
| 976 | __ ldr(r2, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| 977 | __ ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
| 978 | // Check if the object is a JS array or not. |
| 979 | __ cmp(r2, Operand(JS_ARRAY_TYPE)); |
| 980 | __ b(eq, &array); |
| 981 | // Check that the object is some kind of JS object. |
| 982 | __ cmp(r2, Operand(JS_OBJECT_TYPE)); |
| 983 | __ b(lt, &slow); |
| 984 | |
| 985 | |
| 986 | // Object case: Check key against length in the elements array. |
| 987 | __ ldr(r3, FieldMemOperand(r3, JSObject::kElementsOffset)); |
| 988 | // Check that the object is in fast mode (not dictionary). |
| 989 | __ ldr(r2, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| 990 | __ cmp(r2, Operand(Factory::hash_table_map())); |
| 991 | __ b(eq, &slow); |
| 992 | // Untag the key (for checking against untagged length in the fixed array). |
| 993 | __ mov(r1, Operand(r1, ASR, kSmiTagSize)); |
| 994 | // Compute address to store into and check array bounds. |
| 995 | __ add(r2, r3, Operand(Array::kHeaderSize - kHeapObjectTag)); |
| 996 | __ add(r2, r2, Operand(r1, LSL, kPointerSizeLog2)); |
| 997 | __ ldr(ip, FieldMemOperand(r3, Array::kLengthOffset)); |
| 998 | __ cmp(r1, Operand(ip)); |
| 999 | __ b(lo, &fast); |
| 1000 | |
| 1001 | |
| 1002 | // Slow case: Push extra copies of the arguments (3). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1003 | __ bind(&slow); |
| 1004 | __ ldm(ia, sp, r1.bit() | r3.bit()); // r0 == value, r1 == key, r3 == object |
| 1005 | __ stm(db_w, sp, r0.bit() | r1.bit() | r3.bit()); |
| 1006 | // Do tail-call to runtime routine. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1007 | __ TailCallRuntime(ExternalReference(Runtime::kSetProperty), 3); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1008 | |
| 1009 | |
| 1010 | // Extra capacity case: Check if there is extra capacity to |
| 1011 | // perform the store and update the length. Used for adding one |
| 1012 | // element to the array by writing to array[array.length]. |
| 1013 | // r0 == value, r1 == key, r2 == elements, r3 == object |
| 1014 | __ bind(&extra); |
| 1015 | __ b(ne, &slow); // do not leave holes in the array |
| 1016 | __ mov(r1, Operand(r1, ASR, kSmiTagSize)); // untag |
| 1017 | __ ldr(ip, FieldMemOperand(r2, Array::kLengthOffset)); |
| 1018 | __ cmp(r1, Operand(ip)); |
| 1019 | __ b(hs, &slow); |
| 1020 | __ mov(r1, Operand(r1, LSL, kSmiTagSize)); // restore tag |
| 1021 | __ add(r1, r1, Operand(1 << kSmiTagSize)); // and increment |
| 1022 | __ str(r1, FieldMemOperand(r3, JSArray::kLengthOffset)); |
| 1023 | __ mov(r3, Operand(r2)); |
| 1024 | // NOTE: Computing the address to store into must take the fact |
| 1025 | // that the key has been incremented into account. |
| 1026 | int displacement = Array::kHeaderSize - kHeapObjectTag - |
| 1027 | ((1 << kSmiTagSize) * 2); |
| 1028 | __ add(r2, r2, Operand(displacement)); |
| 1029 | __ add(r2, r2, Operand(r1, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1030 | __ b(&fast); |
| 1031 | |
| 1032 | |
| 1033 | // Array case: Get the length and the elements array from the JS |
| 1034 | // array. Check that the array is in fast mode; if it is the |
| 1035 | // length is always a smi. |
| 1036 | // r0 == value, r3 == object |
| 1037 | __ bind(&array); |
| 1038 | __ ldr(r2, FieldMemOperand(r3, JSObject::kElementsOffset)); |
| 1039 | __ ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 1040 | __ cmp(r1, Operand(Factory::hash_table_map())); |
| 1041 | __ b(eq, &slow); |
| 1042 | |
| 1043 | // Check the key against the length in the array, compute the |
| 1044 | // address to store into and fall through to fast case. |
| 1045 | __ ldr(r1, MemOperand(sp)); |
| 1046 | // r0 == value, r1 == key, r2 == elements, r3 == object. |
| 1047 | __ ldr(ip, FieldMemOperand(r3, JSArray::kLengthOffset)); |
| 1048 | __ cmp(r1, Operand(ip)); |
| 1049 | __ b(hs, &extra); |
| 1050 | __ mov(r3, Operand(r2)); |
| 1051 | __ add(r2, r2, Operand(Array::kHeaderSize - kHeapObjectTag)); |
| 1052 | __ add(r2, r2, Operand(r1, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1053 | |
| 1054 | |
| 1055 | // Fast case: Do the store. |
| 1056 | // r0 == value, r2 == address to store into, r3 == elements |
| 1057 | __ bind(&fast); |
| 1058 | __ str(r0, MemOperand(r2)); |
| 1059 | // Skip write barrier if the written value is a smi. |
| 1060 | __ tst(r0, Operand(kSmiTagMask)); |
| 1061 | __ b(eq, &exit); |
| 1062 | // Update write barrier for the elements array address. |
| 1063 | __ sub(r1, r2, Operand(r3)); |
| 1064 | __ RecordWrite(r3, r1, r2); |
| 1065 | __ bind(&exit); |
| 1066 | masm->StubReturn(1); |
| 1067 | } |
| 1068 | |
| 1069 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1070 | class GenericBinaryOpStub : public CodeStub { |
| 1071 | public: |
| 1072 | explicit GenericBinaryOpStub(Token::Value op) : op_(op) { } |
| 1073 | |
| 1074 | private: |
| 1075 | Token::Value op_; |
| 1076 | |
| 1077 | Major MajorKey() { return GenericBinaryOp; } |
| 1078 | int MinorKey() { return static_cast<int>(op_); } |
| 1079 | void Generate(MacroAssembler* masm); |
| 1080 | |
| 1081 | const char* GetName() { |
| 1082 | switch (op_) { |
| 1083 | case Token::ADD: return "GenericBinaryOpStub_ADD"; |
| 1084 | case Token::SUB: return "GenericBinaryOpStub_SUB"; |
| 1085 | case Token::MUL: return "GenericBinaryOpStub_MUL"; |
| 1086 | case Token::DIV: return "GenericBinaryOpStub_DIV"; |
| 1087 | default: return "GenericBinaryOpStub"; |
| 1088 | } |
| 1089 | } |
| 1090 | |
| 1091 | #ifdef DEBUG |
| 1092 | void Print() { PrintF("GenericBinaryOpStub (%s)\n", Token::String(op_)); } |
| 1093 | #endif |
| 1094 | }; |
| 1095 | |
| 1096 | |
| 1097 | void GenericBinaryOpStub::Generate(MacroAssembler* masm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1098 | // r1 : x |
| 1099 | // r0 : y |
| 1100 | // result : r0 |
| 1101 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1102 | switch (op_) { |
| 1103 | case Token::ADD: { |
| 1104 | Label slow, exit; |
| 1105 | // fast path |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1106 | __ orr(r2, r1, Operand(r0)); // r2 = x | y; |
| 1107 | __ add(r0, r1, Operand(r0), SetCC); // add y optimistically |
| 1108 | // go slow-path in case of overflow |
| 1109 | __ b(vs, &slow); |
| 1110 | // go slow-path in case of non-smi operands |
| 1111 | ASSERT(kSmiTag == 0); // adjust code below |
| 1112 | __ tst(r2, Operand(kSmiTagMask)); |
| 1113 | __ b(eq, &exit); |
| 1114 | // slow path |
| 1115 | __ bind(&slow); |
| 1116 | __ sub(r0, r0, Operand(r1)); // revert optimistic add |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1117 | __ push(r1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1118 | __ push(r0); |
| 1119 | __ mov(r0, Operand(1)); // set number of arguments |
| 1120 | __ InvokeBuiltin("ADD", 1, JUMP_JS); |
| 1121 | // done |
| 1122 | __ bind(&exit); |
| 1123 | break; |
| 1124 | } |
| 1125 | |
| 1126 | case Token::SUB: { |
| 1127 | Label slow, exit; |
| 1128 | // fast path |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1129 | __ orr(r2, r1, Operand(r0)); // r2 = x | y; |
| 1130 | __ sub(r3, r1, Operand(r0), SetCC); // subtract y optimistically |
| 1131 | // go slow-path in case of overflow |
| 1132 | __ b(vs, &slow); |
| 1133 | // go slow-path in case of non-smi operands |
| 1134 | ASSERT(kSmiTag == 0); // adjust code below |
| 1135 | __ tst(r2, Operand(kSmiTagMask)); |
| 1136 | __ mov(r0, Operand(r3), LeaveCC, eq); // conditionally set r0 to result |
| 1137 | __ b(eq, &exit); |
| 1138 | // slow path |
| 1139 | __ bind(&slow); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1140 | __ push(r1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1141 | __ push(r0); |
| 1142 | __ mov(r0, Operand(1)); // set number of arguments |
| 1143 | __ InvokeBuiltin("SUB", 1, JUMP_JS); |
| 1144 | // done |
| 1145 | __ bind(&exit); |
| 1146 | break; |
| 1147 | } |
| 1148 | |
| 1149 | case Token::MUL: { |
| 1150 | Label slow, exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1151 | // tag check |
| 1152 | __ orr(r2, r1, Operand(r0)); // r2 = x | y; |
| 1153 | ASSERT(kSmiTag == 0); // adjust code below |
| 1154 | __ tst(r2, Operand(kSmiTagMask)); |
| 1155 | __ b(ne, &slow); |
| 1156 | // remove tag from one operand (but keep sign), so that result is smi |
| 1157 | __ mov(ip, Operand(r0, ASR, kSmiTagSize)); |
| 1158 | // do multiplication |
| 1159 | __ smull(r3, r2, r1, ip); // r3 = lower 32 bits of ip*r1 |
| 1160 | // go slow on overflows (overflow bit is not set) |
| 1161 | __ mov(ip, Operand(r3, ASR, 31)); |
| 1162 | __ cmp(ip, Operand(r2)); // no overflow if higher 33 bits are identical |
| 1163 | __ b(ne, &slow); |
| 1164 | // go slow on zero result to handle -0 |
| 1165 | __ tst(r3, Operand(r3)); |
| 1166 | __ mov(r0, Operand(r3), LeaveCC, ne); |
| 1167 | __ b(ne, &exit); |
| 1168 | // slow case |
| 1169 | __ bind(&slow); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1170 | __ push(r1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1171 | __ push(r0); |
| 1172 | __ mov(r0, Operand(1)); // set number of arguments |
| 1173 | __ InvokeBuiltin("MUL", 1, JUMP_JS); |
| 1174 | // done |
| 1175 | __ bind(&exit); |
| 1176 | break; |
| 1177 | } |
| 1178 | default: UNREACHABLE(); |
| 1179 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1180 | __ Ret(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1181 | } |
| 1182 | |
| 1183 | |
| 1184 | class SmiOpStub : public CodeStub { |
| 1185 | public: |
| 1186 | SmiOpStub(Token::Value op, bool reversed) |
| 1187 | : op_(op), reversed_(reversed) {} |
| 1188 | |
| 1189 | private: |
| 1190 | Token::Value op_; |
| 1191 | bool reversed_; |
| 1192 | |
| 1193 | Major MajorKey() { return SmiOp; } |
| 1194 | int MinorKey() { |
| 1195 | return (op_ == Token::ADD ? 2 : 0) | (reversed_ ? 1 : 0); |
| 1196 | } |
| 1197 | void Generate(MacroAssembler* masm); |
| 1198 | void GenerateShared(MacroAssembler* masm); |
| 1199 | |
| 1200 | const char* GetName() { return "SmiOpStub"; } |
| 1201 | |
| 1202 | #ifdef DEBUG |
| 1203 | void Print() { |
| 1204 | PrintF("SmiOpStub (token %s), (reversed %s)\n", |
| 1205 | Token::String(op_), reversed_ ? "true" : "false"); |
| 1206 | } |
| 1207 | #endif |
| 1208 | }; |
| 1209 | |
| 1210 | |
| 1211 | void SmiOpStub::Generate(MacroAssembler* masm) { |
| 1212 | switch (op_) { |
| 1213 | case Token::ADD: { |
| 1214 | if (!reversed_) { |
| 1215 | __ sub(r0, r0, Operand(r1)); // revert optimistic add |
| 1216 | __ push(r0); |
| 1217 | __ push(r1); |
| 1218 | __ mov(r0, Operand(1)); // set number of arguments |
| 1219 | __ InvokeBuiltin("ADD", 1, JUMP_JS); |
| 1220 | } else { |
| 1221 | __ sub(r0, r0, Operand(r1)); // revert optimistic add |
| 1222 | __ push(r1); // reversed |
| 1223 | __ push(r0); |
| 1224 | __ mov(r0, Operand(1)); // set number of arguments |
| 1225 | __ InvokeBuiltin("ADD", 1, JUMP_JS); |
| 1226 | } |
| 1227 | break; |
| 1228 | } |
| 1229 | case Token::SUB: { |
| 1230 | if (!reversed_) { |
| 1231 | __ push(r0); |
| 1232 | __ push(r1); |
| 1233 | __ mov(r0, Operand(1)); // set number of arguments |
| 1234 | __ InvokeBuiltin("SUB", 1, JUMP_JS); |
| 1235 | } else { |
| 1236 | __ push(r1); |
| 1237 | __ push(r0); |
| 1238 | __ mov(r0, Operand(1)); // set number of arguments |
| 1239 | __ InvokeBuiltin("SUB", 1, JUMP_JS); |
| 1240 | } |
| 1241 | break; |
| 1242 | } |
| 1243 | default: UNREACHABLE(); |
| 1244 | } |
| 1245 | } |
| 1246 | |
| 1247 | void StackCheckStub::Generate(MacroAssembler* masm) { |
| 1248 | Label within_limit; |
| 1249 | __ mov(ip, Operand(ExternalReference::address_of_stack_guard_limit())); |
| 1250 | __ ldr(ip, MemOperand(ip)); |
| 1251 | __ cmp(sp, Operand(ip)); |
| 1252 | __ b(hs, &within_limit); |
| 1253 | // Do tail-call to runtime routine. |
| 1254 | __ push(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1255 | __ TailCallRuntime(ExternalReference(Runtime::kStackGuard), 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1256 | __ bind(&within_limit); |
| 1257 | |
| 1258 | masm->StubReturn(1); |
| 1259 | } |
| 1260 | |
| 1261 | |
| 1262 | void UnarySubStub::Generate(MacroAssembler* masm) { |
| 1263 | Label undo; |
| 1264 | Label slow; |
| 1265 | Label done; |
| 1266 | |
| 1267 | // Enter runtime system if the value is not a smi. |
| 1268 | __ tst(r0, Operand(kSmiTagMask)); |
| 1269 | __ b(ne, &slow); |
| 1270 | |
| 1271 | // Enter runtime system if the value of the expression is zero |
| 1272 | // to make sure that we switch between 0 and -0. |
| 1273 | __ cmp(r0, Operand(0)); |
| 1274 | __ b(eq, &slow); |
| 1275 | |
| 1276 | // The value of the expression is a smi that is not zero. Try |
| 1277 | // optimistic subtraction '0 - value'. |
| 1278 | __ rsb(r1, r0, Operand(0), SetCC); |
| 1279 | __ b(vs, &slow); |
| 1280 | |
| 1281 | // If result is a smi we are done. |
| 1282 | __ tst(r1, Operand(kSmiTagMask)); |
| 1283 | __ mov(r0, Operand(r1), LeaveCC, eq); // conditionally set r0 to result |
| 1284 | __ b(eq, &done); |
| 1285 | |
| 1286 | // Enter runtime system. |
| 1287 | __ bind(&slow); |
| 1288 | __ push(r0); |
| 1289 | __ mov(r0, Operand(0)); // set number of arguments |
| 1290 | __ InvokeBuiltin("UNARY_MINUS", 0, JUMP_JS); |
| 1291 | |
| 1292 | __ bind(&done); |
| 1293 | masm->StubReturn(1); |
| 1294 | } |
| 1295 | |
| 1296 | |
| 1297 | class InvokeBuiltinStub : public CodeStub { |
| 1298 | public: |
| 1299 | enum Kind { Inc, Dec, ToNumber }; |
| 1300 | InvokeBuiltinStub(Kind kind, int argc) : kind_(kind), argc_(argc) { } |
| 1301 | |
| 1302 | private: |
| 1303 | Kind kind_; |
| 1304 | int argc_; |
| 1305 | |
| 1306 | Major MajorKey() { return InvokeBuiltin; } |
| 1307 | int MinorKey() { return (argc_ << 3) | static_cast<int>(kind_); } |
| 1308 | void Generate(MacroAssembler* masm); |
| 1309 | |
| 1310 | const char* GetName() { return "InvokeBuiltinStub"; } |
| 1311 | |
| 1312 | #ifdef DEBUG |
| 1313 | void Print() { |
| 1314 | PrintF("InvokeBuiltinStub (kind %d, argc, %d)\n", |
| 1315 | static_cast<int>(kind_), |
| 1316 | argc_); |
| 1317 | } |
| 1318 | #endif |
| 1319 | }; |
| 1320 | |
| 1321 | |
| 1322 | void InvokeBuiltinStub::Generate(MacroAssembler* masm) { |
| 1323 | __ push(r0); |
| 1324 | __ mov(r0, Operand(0)); // set number of arguments |
| 1325 | switch (kind_) { |
| 1326 | case ToNumber: __ InvokeBuiltin("TO_NUMBER", 0, JUMP_JS); break; |
| 1327 | case Inc: __ InvokeBuiltin("INC", 0, JUMP_JS); break; |
| 1328 | case Dec: __ InvokeBuiltin("DEC", 0, JUMP_JS); break; |
| 1329 | default: UNREACHABLE(); |
| 1330 | } |
| 1331 | masm->StubReturn(argc_); |
| 1332 | } |
| 1333 | |
| 1334 | |
| 1335 | class JSExitStub : public CodeStub { |
| 1336 | public: |
| 1337 | enum Kind { Inc, Dec, ToNumber }; |
| 1338 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1339 | explicit JSExitStub(ExitJSFlag flag) : flag_(flag) { } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1340 | |
| 1341 | private: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1342 | ExitJSFlag flag_; |
| 1343 | |
| 1344 | Major MajorKey() { return JSExit; } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1345 | int MinorKey() { return static_cast<int>(flag_); } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1346 | void Generate(MacroAssembler* masm); |
| 1347 | |
| 1348 | const char* GetName() { return "JSExitStub"; } |
| 1349 | |
| 1350 | #ifdef DEBUG |
| 1351 | void Print() { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1352 | PrintF("JSExitStub flag %d)\n", static_cast<int>(flag_)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1353 | } |
| 1354 | #endif |
| 1355 | }; |
| 1356 | |
| 1357 | |
| 1358 | void JSExitStub::Generate(MacroAssembler* masm) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1359 | __ ExitJSFrame(flag_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1360 | masm->StubReturn(1); |
| 1361 | } |
| 1362 | |
| 1363 | |
| 1364 | |
| 1365 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
| 1366 | // r0 holds exception |
| 1367 | ASSERT(StackHandlerConstants::kSize == 6 * kPointerSize); // adjust this code |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1368 | __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
| 1369 | __ ldr(sp, MemOperand(r3)); |
| 1370 | __ pop(r2); // pop next in chain |
| 1371 | __ str(r2, MemOperand(r3)); |
| 1372 | // restore parameter- and frame-pointer and pop state. |
| 1373 | __ ldm(ia_w, sp, r3.bit() | pp.bit() | fp.bit()); |
| 1374 | // Before returning we restore the context from the frame pointer if not NULL. |
| 1375 | // The frame pointer is NULL in the exception handler of a JS entry frame. |
| 1376 | __ cmp(fp, Operand(0)); |
| 1377 | // Set cp to NULL if fp is NULL. |
| 1378 | __ mov(cp, Operand(0), LeaveCC, eq); |
| 1379 | // Restore cp otherwise. |
| 1380 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
| 1381 | if (kDebug && FLAG_debug_code) __ mov(lr, Operand(pc)); |
| 1382 | __ pop(pc); |
| 1383 | } |
| 1384 | |
| 1385 | |
| 1386 | void CEntryStub::GenerateThrowOutOfMemory(MacroAssembler* masm) { |
| 1387 | // Fetch top stack handler. |
| 1388 | __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
| 1389 | __ ldr(r3, MemOperand(r3)); |
| 1390 | |
| 1391 | // Unwind the handlers until the ENTRY handler is found. |
| 1392 | Label loop, done; |
| 1393 | __ bind(&loop); |
| 1394 | // Load the type of the current stack handler. |
| 1395 | const int kStateOffset = StackHandlerConstants::kAddressDisplacement + |
| 1396 | StackHandlerConstants::kStateOffset; |
| 1397 | __ ldr(r2, MemOperand(r3, kStateOffset)); |
| 1398 | __ cmp(r2, Operand(StackHandler::ENTRY)); |
| 1399 | __ b(eq, &done); |
| 1400 | // Fetch the next handler in the list. |
| 1401 | const int kNextOffset = StackHandlerConstants::kAddressDisplacement + |
| 1402 | StackHandlerConstants::kNextOffset; |
| 1403 | __ ldr(r3, MemOperand(r3, kNextOffset)); |
| 1404 | __ jmp(&loop); |
| 1405 | __ bind(&done); |
| 1406 | |
| 1407 | // Set the top handler address to next handler past the current ENTRY handler. |
| 1408 | __ ldr(r0, MemOperand(r3, kNextOffset)); |
| 1409 | __ mov(r2, Operand(ExternalReference(Top::k_handler_address))); |
| 1410 | __ str(r0, MemOperand(r2)); |
| 1411 | |
| 1412 | // Set external caught exception to false. |
| 1413 | __ mov(r0, Operand(false)); |
| 1414 | ExternalReference external_caught(Top::k_external_caught_exception_address); |
| 1415 | __ mov(r2, Operand(external_caught)); |
| 1416 | __ str(r0, MemOperand(r2)); |
| 1417 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1418 | // Set pending exception and r0 to out of memory exception. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1419 | Failure* out_of_memory = Failure::OutOfMemoryException(); |
| 1420 | __ mov(r0, Operand(reinterpret_cast<int32_t>(out_of_memory))); |
| 1421 | __ mov(r2, Operand(ExternalReference(Top::k_pending_exception_address))); |
| 1422 | __ str(r0, MemOperand(r2)); |
| 1423 | |
| 1424 | // Restore the stack to the address of the ENTRY handler |
| 1425 | __ mov(sp, Operand(r3)); |
| 1426 | |
| 1427 | // restore parameter- and frame-pointer and pop state. |
| 1428 | __ ldm(ia_w, sp, r3.bit() | pp.bit() | fp.bit()); |
| 1429 | // Before returning we restore the context from the frame pointer if not NULL. |
| 1430 | // The frame pointer is NULL in the exception handler of a JS entry frame. |
| 1431 | __ cmp(fp, Operand(0)); |
| 1432 | // Set cp to NULL if fp is NULL. |
| 1433 | __ mov(cp, Operand(0), LeaveCC, eq); |
| 1434 | // Restore cp otherwise. |
| 1435 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
| 1436 | if (kDebug && FLAG_debug_code) __ mov(lr, Operand(pc)); |
| 1437 | __ pop(pc); |
| 1438 | } |
| 1439 | |
| 1440 | |
| 1441 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 1442 | Label* throw_normal_exception, |
| 1443 | Label* throw_out_of_memory_exception, |
| 1444 | bool do_gc, |
| 1445 | bool do_restore) { |
| 1446 | // r0: result parameter for PerformGC, if any |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1447 | // r4: number of arguments including receiver (C callee-saved) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1448 | // r5: pointer to builtin function (C callee-saved) |
| 1449 | |
| 1450 | if (do_gc) { |
| 1451 | __ Call(FUNCTION_ADDR(Runtime::PerformGC), runtime_entry); // passing r0 |
| 1452 | } |
| 1453 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1454 | // Call C built-in. |
| 1455 | // r0 = argc. |
| 1456 | __ mov(r0, Operand(r4)); |
| 1457 | // r1 = argv. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1458 | __ add(r1, fp, Operand(r4, LSL, kPointerSizeLog2)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1459 | __ add(r1, r1, Operand(ExitFrameConstants::kPPDisplacement - kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1460 | |
| 1461 | // TODO(1242173): To let the GC traverse the return address of the exit |
| 1462 | // frames, we need to know where the return address is. Right now, |
| 1463 | // we push it on the stack to be able to find it again, but we never |
| 1464 | // restore from it in case of changes, which makes it impossible to |
| 1465 | // support moving the C entry code stub. This should be fixed, but currently |
| 1466 | // this is OK because the CEntryStub gets generated so early in the V8 boot |
| 1467 | // sequence that it is not moving ever. |
| 1468 | __ add(lr, pc, Operand(4)); // compute return address: (pc + 8) + 4 |
| 1469 | __ push(lr); |
| 1470 | #if !defined(__arm__) |
| 1471 | // Notify the simulator of the transition to C code. |
| 1472 | __ swi(assembler::arm::call_rt_r5); |
| 1473 | #else /* !defined(__arm__) */ |
| 1474 | __ mov(pc, Operand(r5)); |
| 1475 | #endif /* !defined(__arm__) */ |
| 1476 | // result is in r0 or r0:r1 - do not destroy these registers! |
| 1477 | |
| 1478 | // check for failure result |
| 1479 | Label failure_returned; |
| 1480 | ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 1481 | // Lower 2 bits of r2 are 0 iff r0 has failure tag. |
| 1482 | __ add(r2, r0, Operand(1)); |
| 1483 | __ tst(r2, Operand(kFailureTagMask)); |
| 1484 | __ b(eq, &failure_returned); |
| 1485 | |
| 1486 | // clear top frame |
| 1487 | __ mov(r3, Operand(0)); |
| 1488 | __ mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); |
| 1489 | __ str(r3, MemOperand(ip)); |
| 1490 | |
| 1491 | // Restore the memory copy of the registers by digging them out from |
| 1492 | // the stack. |
| 1493 | if (do_restore) { |
| 1494 | // Ok to clobber r2 and r3. |
| 1495 | const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; |
| 1496 | const int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize; |
| 1497 | __ add(r3, fp, Operand(kOffset)); |
| 1498 | __ CopyRegistersFromStackToMemory(r3, r2, kJSCallerSaved); |
| 1499 | } |
| 1500 | |
| 1501 | // Exit C frame and return |
| 1502 | // r0:r1: result |
| 1503 | // sp: stack pointer |
| 1504 | // fp: frame pointer |
| 1505 | // pp: caller's parameter pointer pp (restored as C callee-saved) |
| 1506 | |
| 1507 | // Restore current context from top and clear it in debug mode. |
| 1508 | __ mov(r3, Operand(Top::context_address())); |
| 1509 | __ ldr(cp, MemOperand(r3)); |
| 1510 | __ mov(sp, Operand(fp)); // respect ABI stack constraint |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1511 | __ ldm(ia, sp, pp.bit() | fp.bit() | sp.bit() | pc.bit()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1512 | |
| 1513 | // check if we should retry or throw exception |
| 1514 | Label retry; |
| 1515 | __ bind(&failure_returned); |
| 1516 | ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 1517 | __ tst(r0, Operand(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| 1518 | __ b(eq, &retry); |
| 1519 | |
| 1520 | Label continue_exception; |
| 1521 | // If the returned failure is EXCEPTION then promote Top::pending_exception(). |
| 1522 | __ cmp(r0, Operand(reinterpret_cast<int32_t>(Failure::Exception()))); |
| 1523 | __ b(ne, &continue_exception); |
| 1524 | |
| 1525 | // Retrieve the pending exception and clear the variable. |
| 1526 | __ mov(ip, Operand(Factory::the_hole_value().location())); |
| 1527 | __ ldr(r3, MemOperand(ip)); |
| 1528 | __ mov(ip, Operand(Top::pending_exception_address())); |
| 1529 | __ ldr(r0, MemOperand(ip)); |
| 1530 | __ str(r3, MemOperand(ip)); |
| 1531 | |
| 1532 | __ bind(&continue_exception); |
| 1533 | // Special handling of out of memory exception. |
| 1534 | Failure* out_of_memory = Failure::OutOfMemoryException(); |
| 1535 | __ cmp(r0, Operand(reinterpret_cast<int32_t>(out_of_memory))); |
| 1536 | __ b(eq, throw_out_of_memory_exception); |
| 1537 | |
| 1538 | // Handle normal exception. |
| 1539 | __ jmp(throw_normal_exception); |
| 1540 | |
| 1541 | __ bind(&retry); // pass last failure (r0) as parameter (r0) when retrying |
| 1542 | } |
| 1543 | |
| 1544 | |
| 1545 | void CEntryStub::GenerateBody(MacroAssembler* masm, bool is_debug_break) { |
| 1546 | // Called from JavaScript; parameters are on stack as if calling JS function |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1547 | // r0: number of arguments including receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1548 | // r1: pointer to builtin function |
| 1549 | // fp: frame pointer (restored after C call) |
| 1550 | // sp: stack pointer (restored as callee's pp after C call) |
| 1551 | // cp: current context (C callee-saved) |
| 1552 | // pp: caller's parameter pointer pp (C callee-saved) |
| 1553 | |
| 1554 | // NOTE: Invocations of builtins may return failure objects |
| 1555 | // instead of a proper result. The builtin entry handles |
| 1556 | // this by performing a garbage collection and retrying the |
| 1557 | // builtin once. |
| 1558 | |
| 1559 | // Enter C frame |
| 1560 | // Compute parameter pointer before making changes and save it as ip register |
| 1561 | // so that it is restored as sp register on exit, thereby popping the args. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1562 | // ip = sp + kPointerSize*args_len; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1563 | __ add(ip, sp, Operand(r0, LSL, kPointerSizeLog2)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1564 | |
| 1565 | // all JS callee-saved are saved and traversed by GC; push in reverse order: |
| 1566 | // JS callee-saved, caller_pp, caller_fp, sp_on_exit (ip==pp), caller_pc |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1567 | __ stm(db_w, sp, pp.bit() | fp.bit() | ip.bit() | lr.bit()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1568 | __ mov(fp, Operand(sp)); // setup new frame pointer |
| 1569 | |
| 1570 | // Store the current context in top. |
| 1571 | __ mov(ip, Operand(Top::context_address())); |
| 1572 | __ str(cp, MemOperand(ip)); |
| 1573 | |
| 1574 | // remember top frame |
| 1575 | __ mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); |
| 1576 | __ str(fp, MemOperand(ip)); |
| 1577 | |
| 1578 | // Push debug marker. |
| 1579 | __ mov(ip, Operand(is_debug_break ? 1 : 0)); |
| 1580 | __ push(ip); |
| 1581 | |
| 1582 | if (is_debug_break) { |
| 1583 | // Save the state of all registers to the stack from the memory location. |
| 1584 | // Use sp as base to push. |
| 1585 | __ CopyRegistersFromMemoryToStack(sp, kJSCallerSaved); |
| 1586 | } |
| 1587 | |
| 1588 | // move number of arguments (argc) into callee-saved register |
| 1589 | __ mov(r4, Operand(r0)); |
| 1590 | |
| 1591 | // move pointer to builtin function into callee-saved register |
| 1592 | __ mov(r5, Operand(r1)); |
| 1593 | |
| 1594 | // r0: result parameter for PerformGC, if any (setup below) |
| 1595 | // r4: number of arguments |
| 1596 | // r5: pointer to builtin function (C callee-saved) |
| 1597 | |
| 1598 | Label entry; |
| 1599 | __ bind(&entry); |
| 1600 | |
| 1601 | Label throw_out_of_memory_exception; |
| 1602 | Label throw_normal_exception; |
| 1603 | |
| 1604 | #ifdef DEBUG |
| 1605 | if (FLAG_gc_greedy) { |
| 1606 | Failure* failure = Failure::RetryAfterGC(0, NEW_SPACE); |
| 1607 | __ mov(r0, Operand(reinterpret_cast<intptr_t>(failure))); |
| 1608 | } |
| 1609 | GenerateCore(masm, |
| 1610 | &throw_normal_exception, |
| 1611 | &throw_out_of_memory_exception, |
| 1612 | FLAG_gc_greedy, |
| 1613 | is_debug_break); |
| 1614 | #else |
| 1615 | GenerateCore(masm, |
| 1616 | &throw_normal_exception, |
| 1617 | &throw_out_of_memory_exception, |
| 1618 | false, |
| 1619 | is_debug_break); |
| 1620 | #endif |
| 1621 | GenerateCore(masm, |
| 1622 | &throw_normal_exception, |
| 1623 | &throw_out_of_memory_exception, |
| 1624 | true, |
| 1625 | is_debug_break); |
| 1626 | |
| 1627 | __ bind(&throw_out_of_memory_exception); |
| 1628 | GenerateThrowOutOfMemory(masm); |
| 1629 | // control flow for generated will not return. |
| 1630 | |
| 1631 | __ bind(&throw_normal_exception); |
| 1632 | GenerateThrowTOS(masm); |
| 1633 | } |
| 1634 | |
| 1635 | |
| 1636 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 1637 | // r0: code entry |
| 1638 | // r1: function |
| 1639 | // r2: receiver |
| 1640 | // r3: argc |
| 1641 | // [sp+0]: argv |
| 1642 | |
| 1643 | Label invoke, exit; |
| 1644 | |
| 1645 | // Called from C, so do not pop argc and args on exit (preserve sp) |
| 1646 | // No need to save register-passed args |
| 1647 | // Save callee-saved registers (incl. cp, pp, and fp), sp, and lr |
| 1648 | __ mov(ip, Operand(sp)); |
| 1649 | __ stm(db_w, sp, kCalleeSaved | ip.bit() | lr.bit()); |
| 1650 | |
| 1651 | // Setup frame pointer |
| 1652 | __ mov(fp, Operand(sp)); |
| 1653 | |
| 1654 | // Add constructor mark. |
| 1655 | __ mov(ip, Operand(is_construct ? 1 : 0)); |
| 1656 | __ push(ip); |
| 1657 | |
| 1658 | // Move arguments into registers expected by Builtins::JSEntryTrampoline |
| 1659 | // preserve r0-r3, set r4, r5-r7 may be clobbered |
| 1660 | |
| 1661 | // Get address of argv, see stm above. |
| 1662 | __ add(r4, sp, Operand((kNumCalleeSaved + 3)*kPointerSize)); |
| 1663 | __ ldr(r4, MemOperand(r4)); // argv |
| 1664 | |
| 1665 | // Save copies of the top frame descriptors on the stack. |
| 1666 | __ mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); |
| 1667 | __ ldr(r6, MemOperand(ip)); |
| 1668 | __ stm(db_w, sp, r6.bit()); |
| 1669 | |
| 1670 | // Call a faked try-block that does the invoke. |
| 1671 | __ bl(&invoke); |
| 1672 | |
| 1673 | // Caught exception: Store result (exception) in the pending |
| 1674 | // exception field in the JSEnv and return a failure sentinel. |
| 1675 | __ mov(ip, Operand(Top::pending_exception_address())); |
| 1676 | __ str(r0, MemOperand(ip)); |
| 1677 | __ mov(r0, Operand(Handle<Failure>(Failure::Exception()))); |
| 1678 | __ b(&exit); |
| 1679 | |
| 1680 | // Invoke: Link this frame into the handler chain. |
| 1681 | __ bind(&invoke); |
| 1682 | // Must preserve r0-r3, r5-r7 are available. |
| 1683 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
| 1684 | // If an exception not caught by another handler occurs, this handler returns |
| 1685 | // control to the code after the bl(&invoke) above, which restores all |
| 1686 | // kCalleeSaved registers (including cp, pp and fp) to their saved values |
| 1687 | // before returning a failure to C. |
| 1688 | |
| 1689 | // Clear any pending exceptions. |
| 1690 | __ mov(ip, Operand(ExternalReference::the_hole_value_location())); |
| 1691 | __ ldr(r5, MemOperand(ip)); |
| 1692 | __ mov(ip, Operand(Top::pending_exception_address())); |
| 1693 | __ str(r5, MemOperand(ip)); |
| 1694 | |
| 1695 | // Invoke the function by calling through JS entry trampoline builtin. |
| 1696 | // Notice that we cannot store a reference to the trampoline code directly in |
| 1697 | // this stub, because runtime stubs are not traversed when doing GC. |
| 1698 | |
| 1699 | // Expected registers by Builtins::JSEntryTrampoline |
| 1700 | // r0: code entry |
| 1701 | // r1: function |
| 1702 | // r2: receiver |
| 1703 | // r3: argc |
| 1704 | // r4: argv |
| 1705 | if (is_construct) { |
| 1706 | ExternalReference construct_entry(Builtins::JSConstructEntryTrampoline); |
| 1707 | __ mov(ip, Operand(construct_entry)); |
| 1708 | } else { |
| 1709 | ExternalReference entry(Builtins::JSEntryTrampoline); |
| 1710 | __ mov(ip, Operand(entry)); |
| 1711 | } |
| 1712 | __ ldr(ip, MemOperand(ip)); // deref address |
| 1713 | |
| 1714 | // Branch and link to JSEntryTrampoline |
| 1715 | __ mov(lr, Operand(pc)); |
| 1716 | __ add(pc, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 1717 | |
| 1718 | // Unlink this frame from the handler chain. When reading the |
| 1719 | // address of the next handler, there is no need to use the address |
| 1720 | // displacement since the current stack pointer (sp) points directly |
| 1721 | // to the stack handler. |
| 1722 | __ ldr(r3, MemOperand(sp, StackHandlerConstants::kNextOffset)); |
| 1723 | __ mov(ip, Operand(ExternalReference(Top::k_handler_address))); |
| 1724 | __ str(r3, MemOperand(ip)); |
| 1725 | // No need to restore registers |
| 1726 | __ add(sp, sp, Operand(StackHandlerConstants::kSize)); |
| 1727 | |
| 1728 | __ bind(&exit); // r0 holds result |
| 1729 | // Restore the top frame descriptors from the stack. |
| 1730 | __ ldm(ia_w, sp, r3.bit()); |
| 1731 | __ mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); |
| 1732 | __ str(r3, MemOperand(ip)); |
| 1733 | |
| 1734 | // Remove constructor mark. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1735 | __ pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1736 | |
| 1737 | // Restore callee-saved registers, sp, and return. |
| 1738 | #ifdef DEBUG |
| 1739 | if (FLAG_debug_code) __ mov(lr, Operand(pc)); |
| 1740 | #endif |
| 1741 | __ ldm(ia, sp, kCalleeSaved | sp.bit() | pc.bit()); |
| 1742 | } |
| 1743 | |
| 1744 | |
| 1745 | class ArgumentsAccessStub: public CodeStub { |
| 1746 | public: |
| 1747 | explicit ArgumentsAccessStub(bool is_length) : is_length_(is_length) { } |
| 1748 | |
| 1749 | private: |
| 1750 | bool is_length_; |
| 1751 | |
| 1752 | Major MajorKey() { return ArgumentsAccess; } |
| 1753 | int MinorKey() { return is_length_ ? 1 : 0; } |
| 1754 | void Generate(MacroAssembler* masm); |
| 1755 | |
| 1756 | const char* GetName() { return "ArgumentsAccessStub"; } |
| 1757 | |
| 1758 | #ifdef DEBUG |
| 1759 | void Print() { |
| 1760 | PrintF("ArgumentsAccessStub (is_length %s)\n", |
| 1761 | is_length_ ? "true" : "false"); |
| 1762 | } |
| 1763 | #endif |
| 1764 | }; |
| 1765 | |
| 1766 | |
| 1767 | void ArgumentsAccessStub::Generate(MacroAssembler* masm) { |
| 1768 | if (is_length_) { |
| 1769 | __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kArgsLengthOffset)); |
| 1770 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
| 1771 | __ Ret(); |
| 1772 | } else { |
| 1773 | // Check that the key is a smi. |
| 1774 | Label slow; |
| 1775 | __ tst(r0, Operand(kSmiTagMask)); |
| 1776 | __ b(ne, &slow); |
| 1777 | |
| 1778 | // Get the actual number of arguments passed and do bounds |
| 1779 | // check. Use unsigned comparison to get negative check for free. |
| 1780 | __ ldr(r1, MemOperand(fp, JavaScriptFrameConstants::kArgsLengthOffset)); |
| 1781 | __ cmp(r0, Operand(r1, LSL, kSmiTagSize)); |
| 1782 | __ b(hs, &slow); |
| 1783 | |
| 1784 | // Load the argument directly from the stack and return. |
| 1785 | __ sub(r1, pp, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1786 | __ ldr(r0, MemOperand(r1, JavaScriptFrameConstants::kParam0Offset)); |
| 1787 | __ Ret(); |
| 1788 | |
| 1789 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 1790 | // by calling the runtime system. |
| 1791 | __ bind(&slow); |
| 1792 | __ push(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1793 | __ TailCallRuntime(ExternalReference(Runtime::kGetArgumentsProperty), 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1794 | } |
| 1795 | } |
| 1796 | |
| 1797 | |
| 1798 | #undef __ |
| 1799 | #define __ masm_-> |
| 1800 | |
| 1801 | |
| 1802 | void ArmCodeGenerator::AccessReferenceProperty( |
| 1803 | Expression* key, |
| 1804 | CodeGenState::AccessType access) { |
| 1805 | Reference::Type type = ref()->type(); |
| 1806 | ASSERT(type != Reference::ILLEGAL); |
| 1807 | |
| 1808 | // TODO(1241834): Make sure that this is sufficient. If there is a chance |
| 1809 | // that reference errors can be thrown below, we must distinguish |
| 1810 | // between the 2 kinds of loads (typeof expression loads must not |
| 1811 | // throw a reference errror). |
| 1812 | bool is_load = (access == CodeGenState::LOAD || |
| 1813 | access == CodeGenState::LOAD_TYPEOF_EXPR); |
| 1814 | |
| 1815 | if (type == Reference::NAMED) { |
| 1816 | // Compute the name of the property. |
| 1817 | Literal* literal = key->AsLiteral(); |
| 1818 | Handle<String> name(String::cast(*literal->handle())); |
| 1819 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1820 | // Call the appropriate IC code. |
| 1821 | if (is_load) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1822 | // Setup the name register. |
| 1823 | __ mov(r2, Operand(name)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1824 | Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| 1825 | Variable* var = ref()->expression()->AsVariableProxy()->AsVariable(); |
| 1826 | if (var != NULL) { |
| 1827 | ASSERT(var->is_global()); |
| 1828 | __ Call(ic, code_target_context); |
| 1829 | } else { |
| 1830 | __ Call(ic, code_target); |
| 1831 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1832 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1833 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1834 | __ pop(r0); // value |
| 1835 | // Setup the name register. |
| 1836 | __ mov(r2, Operand(name)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1837 | Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
| 1838 | __ Call(ic, code_target); |
| 1839 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1840 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1841 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1842 | // Access keyed property. |
| 1843 | ASSERT(type == Reference::KEYED); |
| 1844 | |
| 1845 | if (is_load) { |
| 1846 | // TODO(1224671): Implement inline caching for keyed loads as on ia32. |
| 1847 | GetPropertyStub stub; |
| 1848 | __ CallStub(&stub); |
| 1849 | |
| 1850 | } else { |
| 1851 | __ pop(r0); // value |
| 1852 | SetPropertyStub stub; |
| 1853 | __ CallStub(&stub); |
| 1854 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1855 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1856 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1857 | } |
| 1858 | |
| 1859 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1860 | void ArmCodeGenerator::GenericBinaryOperation(Token::Value op) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1861 | // sp[0] : y |
| 1862 | // sp[1] : x |
| 1863 | // result : r0 |
| 1864 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1865 | // Stub is entered with a call: 'return address' is in lr. |
| 1866 | switch (op) { |
| 1867 | case Token::ADD: // fall through. |
| 1868 | case Token::SUB: // fall through. |
| 1869 | case Token::MUL: { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1870 | __ pop(r0); // r0 : y |
| 1871 | __ pop(r1); // r1 : x |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1872 | GenericBinaryOpStub stub(op); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1873 | __ CallStub(&stub); |
| 1874 | break; |
| 1875 | } |
| 1876 | |
| 1877 | case Token::DIV: { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1878 | __ mov(r0, Operand(1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1879 | __ InvokeBuiltin("DIV", 1, CALL_JS); |
| 1880 | break; |
| 1881 | } |
| 1882 | |
| 1883 | case Token::MOD: { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1884 | __ mov(r0, Operand(1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1885 | __ InvokeBuiltin("MOD", 1, CALL_JS); |
| 1886 | break; |
| 1887 | } |
| 1888 | |
| 1889 | case Token::BIT_OR: |
| 1890 | case Token::BIT_AND: |
| 1891 | case Token::BIT_XOR: { |
| 1892 | Label slow, exit; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1893 | __ pop(r0); // get y |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1894 | __ pop(r1); // get x |
| 1895 | // tag check |
| 1896 | __ orr(r2, r1, Operand(r0)); // r2 = x | y; |
| 1897 | ASSERT(kSmiTag == 0); // adjust code below |
| 1898 | __ tst(r2, Operand(kSmiTagMask)); |
| 1899 | __ b(ne, &slow); |
| 1900 | switch (op) { |
| 1901 | case Token::BIT_OR: __ orr(r0, r0, Operand(r1)); break; |
| 1902 | case Token::BIT_AND: __ and_(r0, r0, Operand(r1)); break; |
| 1903 | case Token::BIT_XOR: __ eor(r0, r0, Operand(r1)); break; |
| 1904 | default: UNREACHABLE(); |
| 1905 | } |
| 1906 | __ b(&exit); |
| 1907 | __ bind(&slow); |
| 1908 | __ push(r1); // restore stack |
| 1909 | __ push(r0); |
| 1910 | __ mov(r0, Operand(1)); // 1 argument (not counting receiver). |
| 1911 | switch (op) { |
| 1912 | case Token::BIT_OR: __ InvokeBuiltin("BIT_OR", 1, CALL_JS); break; |
| 1913 | case Token::BIT_AND: __ InvokeBuiltin("BIT_AND", 1, CALL_JS); break; |
| 1914 | case Token::BIT_XOR: __ InvokeBuiltin("BIT_XOR", 1, CALL_JS); break; |
| 1915 | default: UNREACHABLE(); |
| 1916 | } |
| 1917 | __ bind(&exit); |
| 1918 | break; |
| 1919 | } |
| 1920 | |
| 1921 | case Token::SHL: |
| 1922 | case Token::SHR: |
| 1923 | case Token::SAR: { |
| 1924 | Label slow, exit; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1925 | __ pop(r1); // get y |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1926 | __ pop(r0); // get x |
| 1927 | // tag check |
| 1928 | __ orr(r2, r1, Operand(r0)); // r2 = x | y; |
| 1929 | ASSERT(kSmiTag == 0); // adjust code below |
| 1930 | __ tst(r2, Operand(kSmiTagMask)); |
| 1931 | __ b(ne, &slow); |
| 1932 | // get copies of operands |
| 1933 | __ mov(r3, Operand(r0)); |
| 1934 | __ mov(r2, Operand(r1)); |
| 1935 | // remove tags from operands (but keep sign) |
| 1936 | __ mov(r3, Operand(r3, ASR, kSmiTagSize)); |
| 1937 | __ mov(r2, Operand(r2, ASR, kSmiTagSize)); |
| 1938 | // use only the 5 least significant bits of the shift count |
| 1939 | __ and_(r2, r2, Operand(0x1f)); |
| 1940 | // perform operation |
| 1941 | switch (op) { |
| 1942 | case Token::SAR: |
| 1943 | __ mov(r3, Operand(r3, ASR, r2)); |
| 1944 | // no checks of result necessary |
| 1945 | break; |
| 1946 | |
| 1947 | case Token::SHR: |
| 1948 | __ mov(r3, Operand(r3, LSR, r2)); |
| 1949 | // check that the *unsigned* result fits in a smi |
| 1950 | // neither of the two high-order bits can be set: |
| 1951 | // - 0x80000000: high bit would be lost when smi tagging |
| 1952 | // - 0x40000000: this number would convert to negative when |
| 1953 | // smi tagging these two cases can only happen with shifts |
| 1954 | // by 0 or 1 when handed a valid smi |
| 1955 | __ and_(r2, r3, Operand(0xc0000000), SetCC); |
| 1956 | __ b(ne, &slow); |
| 1957 | break; |
| 1958 | |
| 1959 | case Token::SHL: |
| 1960 | __ mov(r3, Operand(r3, LSL, r2)); |
| 1961 | // check that the *signed* result fits in a smi |
| 1962 | __ add(r2, r3, Operand(0x40000000), SetCC); |
| 1963 | __ b(mi, &slow); |
| 1964 | break; |
| 1965 | |
| 1966 | default: UNREACHABLE(); |
| 1967 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1968 | // tag result and store it in r0 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1969 | ASSERT(kSmiTag == 0); // adjust code below |
| 1970 | __ mov(r0, Operand(r3, LSL, kSmiTagSize)); |
| 1971 | __ b(&exit); |
| 1972 | // slow case |
| 1973 | __ bind(&slow); |
| 1974 | __ push(r0); // restore stack |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1975 | __ push(r1); |
| 1976 | __ mov(r0, Operand(1)); // 1 argument (not counting receiver). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1977 | switch (op) { |
| 1978 | case Token::SAR: __ InvokeBuiltin("SAR", 1, CALL_JS); break; |
| 1979 | case Token::SHR: __ InvokeBuiltin("SHR", 1, CALL_JS); break; |
| 1980 | case Token::SHL: __ InvokeBuiltin("SHL", 1, CALL_JS); break; |
| 1981 | default: UNREACHABLE(); |
| 1982 | } |
| 1983 | __ bind(&exit); |
| 1984 | break; |
| 1985 | } |
| 1986 | |
| 1987 | case Token::COMMA: |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1988 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1989 | // simply discard left value |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 1990 | __ pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1991 | break; |
| 1992 | |
| 1993 | default: |
| 1994 | // Other cases should have been handled before this point. |
| 1995 | UNREACHABLE(); |
| 1996 | break; |
| 1997 | } |
| 1998 | } |
| 1999 | |
| 2000 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2001 | void ArmCodeGenerator::SmiOperation(Token::Value op, |
| 2002 | Handle<Object> value, |
| 2003 | bool reversed) { |
| 2004 | // NOTE: This is an attempt to inline (a bit) more of the code for |
| 2005 | // some possible smi operations (like + and -) when (at least) one |
| 2006 | // of the operands is a literal smi. With this optimization, the |
| 2007 | // performance of the system is increased by ~15%, and the generated |
| 2008 | // code size is increased by ~1% (measured on a combination of |
| 2009 | // different benchmarks). |
| 2010 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2011 | // sp[0] : operand |
| 2012 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2013 | ASSERT(value->IsSmi()); |
| 2014 | |
| 2015 | Label exit; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2016 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2017 | |
| 2018 | switch (op) { |
| 2019 | case Token::ADD: { |
| 2020 | Label slow; |
| 2021 | |
| 2022 | __ mov(r1, Operand(value)); |
| 2023 | __ add(r0, r0, Operand(r1), SetCC); |
| 2024 | __ b(vs, &slow); |
| 2025 | __ tst(r0, Operand(kSmiTagMask)); |
| 2026 | __ b(eq, &exit); |
| 2027 | __ bind(&slow); |
| 2028 | |
| 2029 | SmiOpStub stub(Token::ADD, reversed); |
| 2030 | __ CallStub(&stub); |
| 2031 | break; |
| 2032 | } |
| 2033 | |
| 2034 | case Token::SUB: { |
| 2035 | Label slow; |
| 2036 | |
| 2037 | __ mov(r1, Operand(value)); |
| 2038 | if (!reversed) { |
| 2039 | __ sub(r2, r0, Operand(r1), SetCC); |
| 2040 | } else { |
| 2041 | __ rsb(r2, r0, Operand(r1), SetCC); |
| 2042 | } |
| 2043 | __ b(vs, &slow); |
| 2044 | __ tst(r2, Operand(kSmiTagMask)); |
| 2045 | __ mov(r0, Operand(r2), LeaveCC, eq); // conditionally set r0 to result |
| 2046 | __ b(eq, &exit); |
| 2047 | |
| 2048 | __ bind(&slow); |
| 2049 | |
| 2050 | SmiOpStub stub(Token::SUB, reversed); |
| 2051 | __ CallStub(&stub); |
| 2052 | break; |
| 2053 | } |
| 2054 | |
| 2055 | default: |
| 2056 | if (!reversed) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2057 | __ push(r0); |
| 2058 | __ mov(r0, Operand(value)); |
| 2059 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2060 | } else { |
| 2061 | __ mov(ip, Operand(value)); |
| 2062 | __ push(ip); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2063 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2064 | } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2065 | GenericBinaryOperation(op); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2066 | break; |
| 2067 | } |
| 2068 | |
| 2069 | __ bind(&exit); |
| 2070 | } |
| 2071 | |
| 2072 | |
| 2073 | void ArmCodeGenerator::Comparison(Condition cc, bool strict) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2074 | // sp[0] : y |
| 2075 | // sp[1] : x |
| 2076 | // result : cc register |
| 2077 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2078 | // Strict only makes sense for equality comparisons. |
| 2079 | ASSERT(!strict || cc == eq); |
| 2080 | |
| 2081 | Label exit, smi; |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2082 | // Implement '>' and '<=' by reversal to obtain ECMA-262 conversion order. |
| 2083 | if (cc == gt || cc == le) { |
| 2084 | cc = ReverseCondition(cc); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2085 | __ pop(r1); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2086 | __ pop(r0); |
| 2087 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2088 | __ pop(r0); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2089 | __ pop(r1); |
| 2090 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2091 | __ orr(r2, r0, Operand(r1)); |
| 2092 | __ tst(r2, Operand(kSmiTagMask)); |
| 2093 | __ b(eq, &smi); |
| 2094 | |
| 2095 | // Perform non-smi comparison by runtime call. |
| 2096 | __ push(r1); |
| 2097 | |
| 2098 | // Figure out which native to call and setup the arguments. |
| 2099 | const char* native; |
| 2100 | int argc; |
| 2101 | if (cc == eq) { |
| 2102 | native = strict ? "STRICT_EQUALS" : "EQUALS"; |
| 2103 | argc = 1; |
| 2104 | } else { |
| 2105 | native = "COMPARE"; |
| 2106 | int ncr; // NaN compare result |
| 2107 | if (cc == lt || cc == le) { |
| 2108 | ncr = GREATER; |
| 2109 | } else { |
| 2110 | ASSERT(cc == gt || cc == ge); // remaining cases |
| 2111 | ncr = LESS; |
| 2112 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2113 | __ push(r0); |
| 2114 | __ mov(r0, Operand(Smi::FromInt(ncr))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2115 | argc = 2; |
| 2116 | } |
| 2117 | |
| 2118 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 2119 | // tagged as a small integer. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2120 | __ push(r0); |
| 2121 | __ mov(r0, Operand(argc)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2122 | __ InvokeBuiltin(native, argc, CALL_JS); |
| 2123 | __ cmp(r0, Operand(0)); |
| 2124 | __ b(&exit); |
| 2125 | |
| 2126 | // test smi equality by pointer comparison. |
| 2127 | __ bind(&smi); |
| 2128 | __ cmp(r1, Operand(r0)); |
| 2129 | |
| 2130 | __ bind(&exit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2131 | cc_reg_ = cc; |
| 2132 | } |
| 2133 | |
| 2134 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2135 | class CallFunctionStub: public CodeStub { |
| 2136 | public: |
| 2137 | explicit CallFunctionStub(int argc) : argc_(argc) {} |
| 2138 | |
| 2139 | void Generate(MacroAssembler* masm); |
| 2140 | |
| 2141 | private: |
| 2142 | int argc_; |
| 2143 | |
| 2144 | const char* GetName() { return "CallFuntionStub"; } |
| 2145 | |
| 2146 | #if defined(DEBUG) |
| 2147 | void Print() { PrintF("CallFunctionStub (argc %d)\n", argc_); } |
| 2148 | #endif // defined(DEBUG) |
| 2149 | |
| 2150 | Major MajorKey() { return CallFunction; } |
| 2151 | int MinorKey() { return argc_; } |
| 2152 | }; |
| 2153 | |
| 2154 | |
| 2155 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
| 2156 | Label slow; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2157 | // Get the function to call from the stack. |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2158 | // function, receiver [, arguments] |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2159 | masm->ldr(r1, MemOperand(sp, (argc_ + 1) * kPointerSize)); |
| 2160 | |
| 2161 | // Check that the function is really a JavaScript function. |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2162 | // r1: pushed function (to be verified) |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2163 | masm->tst(r1, Operand(kSmiTagMask)); |
| 2164 | masm->b(eq, &slow); |
| 2165 | // Get the map of the function object. |
| 2166 | masm->ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 2167 | masm->ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
| 2168 | masm->cmp(r2, Operand(JS_FUNCTION_TYPE)); |
| 2169 | masm->b(ne, &slow); |
| 2170 | |
| 2171 | // Fast-case: Invoke the function now. |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2172 | // r1: pushed function |
| 2173 | ParameterCount actual(argc_); |
| 2174 | masm->InvokeFunction(r1, actual, JUMP_FUNCTION); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2175 | |
| 2176 | // Slow-case: Non-function called. |
| 2177 | masm->bind(&slow); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2178 | masm->mov(r0, Operand(argc_)); // Setup the number of arguments. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2179 | masm->InvokeBuiltin("CALL_NON_FUNCTION", 0, JUMP_JS); |
| 2180 | } |
| 2181 | |
| 2182 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2183 | // Call the function on the stack with the given arguments. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2184 | void ArmCodeGenerator::CallWithArguments(ZoneList<Expression*>* args, |
| 2185 | int position) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2186 | // Push the arguments ("left-to-right") on the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2187 | for (int i = 0; i < args->length(); i++) { |
| 2188 | Load(args->at(i)); |
| 2189 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2190 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2191 | // Record the position for debugging purposes. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2192 | __ RecordPosition(position); |
| 2193 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2194 | // Use the shared code stub to call the function. |
| 2195 | CallFunctionStub call_function(args->length()); |
| 2196 | __ CallStub(&call_function); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2197 | |
| 2198 | // Restore context and pop function from the stack. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2199 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2200 | __ pop(); // discard the TOS |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2201 | } |
| 2202 | |
| 2203 | |
| 2204 | void ArmCodeGenerator::Branch(bool if_true, Label* L) { |
| 2205 | ASSERT(has_cc()); |
| 2206 | Condition cc = if_true ? cc_reg_ : NegateCondition(cc_reg_); |
| 2207 | __ b(cc, L); |
| 2208 | cc_reg_ = al; |
| 2209 | } |
| 2210 | |
| 2211 | |
| 2212 | void ArmCodeGenerator::CheckStack() { |
| 2213 | if (FLAG_check_stack) { |
| 2214 | Comment cmnt(masm_, "[ check stack"); |
| 2215 | StackCheckStub stub; |
| 2216 | __ CallStub(&stub); |
| 2217 | } |
| 2218 | } |
| 2219 | |
| 2220 | |
| 2221 | void ArmCodeGenerator::VisitBlock(Block* node) { |
| 2222 | Comment cmnt(masm_, "[ Block"); |
| 2223 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2224 | node->set_break_stack_height(break_stack_height_); |
| 2225 | VisitStatements(node->statements()); |
| 2226 | __ bind(node->break_target()); |
| 2227 | } |
| 2228 | |
| 2229 | |
| 2230 | void ArmCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2231 | __ mov(r0, Operand(pairs)); |
| 2232 | __ push(r0); |
| 2233 | __ push(cp); |
| 2234 | __ mov(r0, Operand(Smi::FromInt(is_eval() ? 1 : 0))); |
| 2235 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2236 | __ CallRuntime(Runtime::kDeclareGlobals, 3); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2237 | // The result is discarded. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2238 | } |
| 2239 | |
| 2240 | |
| 2241 | void ArmCodeGenerator::VisitDeclaration(Declaration* node) { |
| 2242 | Comment cmnt(masm_, "[ Declaration"); |
| 2243 | Variable* var = node->proxy()->var(); |
| 2244 | ASSERT(var != NULL); // must have been resolved |
| 2245 | Slot* slot = var->slot(); |
| 2246 | |
| 2247 | // If it was not possible to allocate the variable at compile time, |
| 2248 | // we need to "declare" it at runtime to make sure it actually |
| 2249 | // exists in the local context. |
| 2250 | if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| 2251 | // Variables with a "LOOKUP" slot were introduced as non-locals |
| 2252 | // during variable resolution and must have mode DYNAMIC. |
| 2253 | ASSERT(var->mode() == Variable::DYNAMIC); |
| 2254 | // For now, just do a runtime call. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2255 | __ push(cp); |
| 2256 | __ mov(r0, Operand(var->name())); |
| 2257 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2258 | // Declaration nodes are always declared in only two modes. |
| 2259 | ASSERT(node->mode() == Variable::VAR || node->mode() == Variable::CONST); |
| 2260 | PropertyAttributes attr = node->mode() == Variable::VAR ? NONE : READ_ONLY; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2261 | __ mov(r0, Operand(Smi::FromInt(attr))); |
| 2262 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2263 | // Push initial value, if any. |
| 2264 | // Note: For variables we must not push an initial value (such as |
| 2265 | // 'undefined') because we may have a (legal) redeclaration and we |
| 2266 | // must not destroy the current value. |
| 2267 | if (node->mode() == Variable::CONST) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2268 | __ mov(r0, Operand(Factory::the_hole_value())); |
| 2269 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2270 | } else if (node->fun() != NULL) { |
| 2271 | Load(node->fun()); |
| 2272 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2273 | __ mov(r0, Operand(0)); // no initial value! |
| 2274 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2275 | } |
| 2276 | __ CallRuntime(Runtime::kDeclareContextSlot, 5); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2277 | __ push(r0); |
| 2278 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2279 | return; |
| 2280 | } |
| 2281 | |
| 2282 | ASSERT(!var->is_global()); |
| 2283 | |
| 2284 | // If we have a function or a constant, we need to initialize the variable. |
| 2285 | Expression* val = NULL; |
| 2286 | if (node->mode() == Variable::CONST) { |
| 2287 | val = new Literal(Factory::the_hole_value()); |
| 2288 | } else { |
| 2289 | val = node->fun(); // NULL if we don't have a function |
| 2290 | } |
| 2291 | |
| 2292 | if (val != NULL) { |
| 2293 | // Set initial value. |
| 2294 | Reference target(this, node->proxy()); |
| 2295 | Load(val); |
| 2296 | SetValue(&target); |
| 2297 | // Get rid of the assigned value (declarations are statements). |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2298 | __ pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2299 | } |
| 2300 | } |
| 2301 | |
| 2302 | |
| 2303 | void ArmCodeGenerator::VisitExpressionStatement(ExpressionStatement* node) { |
| 2304 | Comment cmnt(masm_, "[ ExpressionStatement"); |
| 2305 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2306 | Expression* expression = node->expression(); |
| 2307 | expression->MarkAsStatement(); |
| 2308 | Load(expression); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2309 | __ pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2310 | } |
| 2311 | |
| 2312 | |
| 2313 | void ArmCodeGenerator::VisitEmptyStatement(EmptyStatement* node) { |
| 2314 | Comment cmnt(masm_, "// EmptyStatement"); |
| 2315 | // nothing to do |
| 2316 | } |
| 2317 | |
| 2318 | |
| 2319 | void ArmCodeGenerator::VisitIfStatement(IfStatement* node) { |
| 2320 | Comment cmnt(masm_, "[ IfStatement"); |
| 2321 | // Generate different code depending on which |
| 2322 | // parts of the if statement are present or not. |
| 2323 | bool has_then_stm = node->HasThenStatement(); |
| 2324 | bool has_else_stm = node->HasElseStatement(); |
| 2325 | |
| 2326 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2327 | |
| 2328 | Label exit; |
| 2329 | if (has_then_stm && has_else_stm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2330 | Comment cmnt(masm_, "[ IfThenElse"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2331 | Label then; |
| 2332 | Label else_; |
| 2333 | // if (cond) |
| 2334 | LoadCondition(node->condition(), CodeGenState::LOAD, &then, &else_, true); |
| 2335 | Branch(false, &else_); |
| 2336 | // then |
| 2337 | __ bind(&then); |
| 2338 | Visit(node->then_statement()); |
| 2339 | __ b(&exit); |
| 2340 | // else |
| 2341 | __ bind(&else_); |
| 2342 | Visit(node->else_statement()); |
| 2343 | |
| 2344 | } else if (has_then_stm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2345 | Comment cmnt(masm_, "[ IfThen"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2346 | ASSERT(!has_else_stm); |
| 2347 | Label then; |
| 2348 | // if (cond) |
| 2349 | LoadCondition(node->condition(), CodeGenState::LOAD, &then, &exit, true); |
| 2350 | Branch(false, &exit); |
| 2351 | // then |
| 2352 | __ bind(&then); |
| 2353 | Visit(node->then_statement()); |
| 2354 | |
| 2355 | } else if (has_else_stm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2356 | Comment cmnt(masm_, "[ IfElse"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2357 | ASSERT(!has_then_stm); |
| 2358 | Label else_; |
| 2359 | // if (!cond) |
| 2360 | LoadCondition(node->condition(), CodeGenState::LOAD, &exit, &else_, true); |
| 2361 | Branch(true, &exit); |
| 2362 | // else |
| 2363 | __ bind(&else_); |
| 2364 | Visit(node->else_statement()); |
| 2365 | |
| 2366 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2367 | Comment cmnt(masm_, "[ If"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2368 | ASSERT(!has_then_stm && !has_else_stm); |
| 2369 | // if (cond) |
| 2370 | LoadCondition(node->condition(), CodeGenState::LOAD, &exit, &exit, false); |
| 2371 | if (has_cc()) { |
| 2372 | cc_reg_ = al; |
| 2373 | } else { |
| 2374 | __ pop(r0); // __ Pop(no_reg) |
| 2375 | } |
| 2376 | } |
| 2377 | |
| 2378 | // end |
| 2379 | __ bind(&exit); |
| 2380 | } |
| 2381 | |
| 2382 | |
| 2383 | void ArmCodeGenerator::CleanStack(int num_bytes) { |
| 2384 | ASSERT(num_bytes >= 0); |
| 2385 | if (num_bytes > 0) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2386 | __ add(sp, sp, Operand(num_bytes)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2387 | } |
| 2388 | } |
| 2389 | |
| 2390 | |
| 2391 | void ArmCodeGenerator::VisitContinueStatement(ContinueStatement* node) { |
| 2392 | Comment cmnt(masm_, "[ ContinueStatement"); |
| 2393 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2394 | CleanStack(break_stack_height_ - node->target()->break_stack_height()); |
| 2395 | __ b(node->target()->continue_target()); |
| 2396 | } |
| 2397 | |
| 2398 | |
| 2399 | void ArmCodeGenerator::VisitBreakStatement(BreakStatement* node) { |
| 2400 | Comment cmnt(masm_, "[ BreakStatement"); |
| 2401 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2402 | CleanStack(break_stack_height_ - node->target()->break_stack_height()); |
| 2403 | __ b(node->target()->break_target()); |
| 2404 | } |
| 2405 | |
| 2406 | |
| 2407 | void ArmCodeGenerator::VisitReturnStatement(ReturnStatement* node) { |
| 2408 | Comment cmnt(masm_, "[ ReturnStatement"); |
| 2409 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2410 | Load(node->expression()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2411 | // Move the function result into r0. |
| 2412 | __ pop(r0); |
| 2413 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2414 | __ b(&function_return_); |
| 2415 | } |
| 2416 | |
| 2417 | |
| 2418 | void ArmCodeGenerator::VisitWithEnterStatement(WithEnterStatement* node) { |
| 2419 | Comment cmnt(masm_, "[ WithEnterStatement"); |
| 2420 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2421 | Load(node->expression()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2422 | __ CallRuntime(Runtime::kPushContext, 1); |
| 2423 | if (kDebug) { |
| 2424 | Label verified_true; |
| 2425 | __ cmp(r0, Operand(cp)); |
| 2426 | __ b(eq, &verified_true); |
| 2427 | __ stop("PushContext: r0 is expected to be the same as cp"); |
| 2428 | __ bind(&verified_true); |
| 2429 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2430 | // Update context local. |
| 2431 | __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 2432 | } |
| 2433 | |
| 2434 | |
| 2435 | void ArmCodeGenerator::VisitWithExitStatement(WithExitStatement* node) { |
| 2436 | Comment cmnt(masm_, "[ WithExitStatement"); |
| 2437 | // Pop context. |
| 2438 | __ ldr(cp, ContextOperand(cp, Context::PREVIOUS_INDEX)); |
| 2439 | // Update context local. |
| 2440 | __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 2441 | } |
| 2442 | |
| 2443 | |
| 2444 | void ArmCodeGenerator::VisitSwitchStatement(SwitchStatement* node) { |
| 2445 | Comment cmnt(masm_, "[ SwitchStatement"); |
| 2446 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2447 | node->set_break_stack_height(break_stack_height_); |
| 2448 | |
| 2449 | Load(node->tag()); |
| 2450 | |
| 2451 | Label next, fall_through, default_case; |
| 2452 | ZoneList<CaseClause*>* cases = node->cases(); |
| 2453 | int length = cases->length(); |
| 2454 | |
| 2455 | for (int i = 0; i < length; i++) { |
| 2456 | CaseClause* clause = cases->at(i); |
| 2457 | |
| 2458 | Comment cmnt(masm_, "[ case clause"); |
| 2459 | |
| 2460 | if (clause->is_default()) { |
| 2461 | // Bind the default case label, so we can branch to it when we |
| 2462 | // have compared against all other cases. |
| 2463 | ASSERT(default_case.is_unused()); // at most one default clause |
| 2464 | |
| 2465 | // If the default case is the first (but not only) case, we have |
| 2466 | // to jump past it for now. Once we're done with the remaining |
| 2467 | // clauses, we'll branch back here. If it isn't the first case, |
| 2468 | // we jump past it by avoiding to chain it into the next chain. |
| 2469 | if (length > 1) { |
| 2470 | if (i == 0) __ b(&next); |
| 2471 | __ bind(&default_case); |
| 2472 | } |
| 2473 | |
| 2474 | } else { |
| 2475 | __ bind(&next); |
| 2476 | next.Unuse(); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2477 | __ ldr(r0, MemOperand(sp, 0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2478 | __ push(r0); // duplicate TOS |
| 2479 | Load(clause->label()); |
| 2480 | Comparison(eq, true); |
| 2481 | Branch(false, &next); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2482 | // Entering the case statement -> remove the switch value from the stack |
| 2483 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2484 | } |
| 2485 | |
| 2486 | // Generate code for the body. |
| 2487 | __ bind(&fall_through); |
| 2488 | fall_through.Unuse(); |
| 2489 | VisitStatements(clause->statements()); |
| 2490 | __ b(&fall_through); |
| 2491 | } |
| 2492 | |
| 2493 | __ bind(&next); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2494 | // Reached the end of the case statements -> remove the switch value |
| 2495 | // from the stack. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2496 | __ pop(r0); // __ Pop(no_reg) |
| 2497 | if (default_case.is_bound()) __ b(&default_case); |
| 2498 | |
| 2499 | __ bind(&fall_through); |
| 2500 | __ bind(node->break_target()); |
| 2501 | } |
| 2502 | |
| 2503 | |
| 2504 | void ArmCodeGenerator::VisitLoopStatement(LoopStatement* node) { |
| 2505 | Comment cmnt(masm_, "[ LoopStatement"); |
| 2506 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2507 | node->set_break_stack_height(break_stack_height_); |
| 2508 | |
| 2509 | // simple condition analysis |
| 2510 | enum { ALWAYS_TRUE, ALWAYS_FALSE, DONT_KNOW } info = DONT_KNOW; |
| 2511 | if (node->cond() == NULL) { |
| 2512 | ASSERT(node->type() == LoopStatement::FOR_LOOP); |
| 2513 | info = ALWAYS_TRUE; |
| 2514 | } else { |
| 2515 | Literal* lit = node->cond()->AsLiteral(); |
| 2516 | if (lit != NULL) { |
| 2517 | if (lit->IsTrue()) { |
| 2518 | info = ALWAYS_TRUE; |
| 2519 | } else if (lit->IsFalse()) { |
| 2520 | info = ALWAYS_FALSE; |
| 2521 | } |
| 2522 | } |
| 2523 | } |
| 2524 | |
| 2525 | Label loop, entry; |
| 2526 | |
| 2527 | // init |
| 2528 | if (node->init() != NULL) { |
| 2529 | ASSERT(node->type() == LoopStatement::FOR_LOOP); |
| 2530 | Visit(node->init()); |
| 2531 | } |
| 2532 | if (node->type() != LoopStatement::DO_LOOP && info != ALWAYS_TRUE) { |
| 2533 | __ b(&entry); |
| 2534 | } |
| 2535 | |
| 2536 | // body |
| 2537 | __ bind(&loop); |
| 2538 | Visit(node->body()); |
| 2539 | |
| 2540 | // next |
| 2541 | __ bind(node->continue_target()); |
| 2542 | if (node->next() != NULL) { |
| 2543 | // Record source position of the statement as this code which is after the |
| 2544 | // code for the body actually belongs to the loop statement and not the |
| 2545 | // body. |
| 2546 | if (FLAG_debug_info) __ RecordPosition(node->statement_pos()); |
| 2547 | ASSERT(node->type() == LoopStatement::FOR_LOOP); |
| 2548 | Visit(node->next()); |
| 2549 | } |
| 2550 | |
| 2551 | // cond |
| 2552 | __ bind(&entry); |
| 2553 | switch (info) { |
| 2554 | case ALWAYS_TRUE: |
| 2555 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
| 2556 | __ b(&loop); |
| 2557 | break; |
| 2558 | case ALWAYS_FALSE: |
| 2559 | break; |
| 2560 | case DONT_KNOW: |
| 2561 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
| 2562 | LoadCondition(node->cond(), |
| 2563 | CodeGenState::LOAD, |
| 2564 | &loop, |
| 2565 | node->break_target(), |
| 2566 | true); |
| 2567 | Branch(true, &loop); |
| 2568 | break; |
| 2569 | } |
| 2570 | |
| 2571 | // exit |
| 2572 | __ bind(node->break_target()); |
| 2573 | } |
| 2574 | |
| 2575 | |
| 2576 | void ArmCodeGenerator::VisitForInStatement(ForInStatement* node) { |
| 2577 | Comment cmnt(masm_, "[ ForInStatement"); |
| 2578 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2579 | |
| 2580 | // We keep stuff on the stack while the body is executing. |
| 2581 | // Record it, so that a break/continue crossing this statement |
| 2582 | // can restore the stack. |
| 2583 | const int kForInStackSize = 5 * kPointerSize; |
| 2584 | break_stack_height_ += kForInStackSize; |
| 2585 | node->set_break_stack_height(break_stack_height_); |
| 2586 | |
| 2587 | Label loop, next, entry, cleanup, exit, primitive, jsobject; |
| 2588 | Label filter_key, end_del_check, fixed_array, non_string; |
| 2589 | |
| 2590 | // Get the object to enumerate over (converted to JSObject). |
| 2591 | Load(node->enumerable()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2592 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2593 | |
| 2594 | // Both SpiderMonkey and kjs ignore null and undefined in contrast |
| 2595 | // to the specification. 12.6.4 mandates a call to ToObject. |
| 2596 | __ cmp(r0, Operand(Factory::undefined_value())); |
| 2597 | __ b(eq, &exit); |
| 2598 | __ cmp(r0, Operand(Factory::null_value())); |
| 2599 | __ b(eq, &exit); |
| 2600 | |
| 2601 | // Stack layout in body: |
| 2602 | // [iteration counter (Smi)] |
| 2603 | // [length of array] |
| 2604 | // [FixedArray] |
| 2605 | // [Map or 0] |
| 2606 | // [Object] |
| 2607 | |
| 2608 | // Check if enumerable is already a JSObject |
| 2609 | __ tst(r0, Operand(kSmiTagMask)); |
| 2610 | __ b(eq, &primitive); |
| 2611 | __ ldr(r1, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 2612 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 2613 | __ cmp(r1, Operand(JS_OBJECT_TYPE)); |
| 2614 | __ b(hs, &jsobject); |
| 2615 | |
| 2616 | __ bind(&primitive); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2617 | __ push(r0); |
| 2618 | __ mov(r0, Operand(0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2619 | __ InvokeBuiltin("TO_OBJECT", 0, CALL_JS); |
| 2620 | |
| 2621 | |
| 2622 | __ bind(&jsobject); |
| 2623 | |
| 2624 | // Get the set of properties (as a FixedArray or Map). |
| 2625 | __ push(r0); // duplicate the object being enumerated |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2626 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2627 | __ CallRuntime(Runtime::kGetPropertyNamesFast, 1); |
| 2628 | |
| 2629 | // If we got a Map, we can do a fast modification check. |
| 2630 | // Otherwise, we got a FixedArray, and we have to do a slow check. |
| 2631 | __ mov(r2, Operand(r0)); |
| 2632 | __ ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 2633 | __ cmp(r1, Operand(Factory::meta_map())); |
| 2634 | __ b(ne, &fixed_array); |
| 2635 | |
| 2636 | // Get enum cache |
| 2637 | __ mov(r1, Operand(r0)); |
| 2638 | __ ldr(r1, FieldMemOperand(r1, Map::kInstanceDescriptorsOffset)); |
| 2639 | __ ldr(r1, FieldMemOperand(r1, DescriptorArray::kEnumerationIndexOffset)); |
| 2640 | __ ldr(r2, |
| 2641 | FieldMemOperand(r1, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 2642 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2643 | __ push(r0); // map |
| 2644 | __ push(r2); // enum cache bridge cache |
| 2645 | __ ldr(r0, FieldMemOperand(r2, FixedArray::kLengthOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2646 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2647 | __ push(r0); |
| 2648 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 2649 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2650 | __ b(&entry); |
| 2651 | |
| 2652 | |
| 2653 | __ bind(&fixed_array); |
| 2654 | |
| 2655 | __ mov(r1, Operand(Smi::FromInt(0))); |
| 2656 | __ push(r1); // insert 0 in place of Map |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2657 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2658 | |
| 2659 | // Push the length of the array and the initial index onto the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2660 | __ ldr(r0, FieldMemOperand(r0, FixedArray::kLengthOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2661 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2662 | __ push(r0); |
| 2663 | __ mov(r0, Operand(Smi::FromInt(0))); // init index |
| 2664 | __ push(r0); |
| 2665 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2666 | __ b(&entry); |
| 2667 | |
| 2668 | // Body. |
| 2669 | __ bind(&loop); |
| 2670 | Visit(node->body()); |
| 2671 | |
| 2672 | // Next. |
| 2673 | __ bind(node->continue_target()); |
| 2674 | __ bind(&next); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2675 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2676 | __ add(r0, r0, Operand(Smi::FromInt(1))); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2677 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2678 | |
| 2679 | // Condition. |
| 2680 | __ bind(&entry); |
| 2681 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2682 | // sp[0] : index |
| 2683 | // sp[1] : array/enum cache length |
| 2684 | // sp[2] : array or enum cache |
| 2685 | // sp[3] : 0 or map |
| 2686 | // sp[4] : enumerable |
| 2687 | __ ldr(r0, MemOperand(sp, 0 * kPointerSize)); // load the current count |
| 2688 | __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); // load the length |
| 2689 | __ cmp(r0, Operand(r1)); // compare to the array length |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2690 | __ b(hs, &cleanup); |
| 2691 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2692 | __ ldr(r0, MemOperand(sp, 0 * kPointerSize)); |
| 2693 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2694 | // Get the i'th entry of the array. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2695 | __ ldr(r2, MemOperand(sp, 2 * kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2696 | __ add(r2, r2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 2697 | __ ldr(r3, MemOperand(r2, r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 2698 | |
| 2699 | // Get Map or 0. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2700 | __ ldr(r2, MemOperand(sp, 3 * kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2701 | // Check if this (still) matches the map of the enumerable. |
| 2702 | // If not, we have to filter the key. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2703 | __ ldr(r1, MemOperand(sp, 4 * kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2704 | __ ldr(r1, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 2705 | __ cmp(r1, Operand(r2)); |
| 2706 | __ b(eq, &end_del_check); |
| 2707 | |
| 2708 | // Convert the entry to a string (or null if it isn't a property anymore). |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2709 | __ ldr(r0, MemOperand(sp, 4 * kPointerSize)); // push enumerable |
| 2710 | __ push(r0); |
| 2711 | __ push(r3); // push entry |
| 2712 | __ mov(r0, Operand(1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2713 | __ InvokeBuiltin("FILTER_KEY", 1, CALL_JS); |
| 2714 | __ mov(r3, Operand(r0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2715 | |
| 2716 | // If the property has been removed while iterating, we just skip it. |
| 2717 | __ cmp(r3, Operand(Factory::null_value())); |
| 2718 | __ b(eq, &next); |
| 2719 | |
| 2720 | |
| 2721 | __ bind(&end_del_check); |
| 2722 | |
| 2723 | // Store the entry in the 'each' expression and take another spin in the loop. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2724 | // r3: i'th entry of the enum cache (or string there of) |
| 2725 | __ push(r3); // push entry |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2726 | { Reference each(this, node->each()); |
| 2727 | if (!each.is_illegal()) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2728 | if (each.size() > 0) { |
| 2729 | __ ldr(r0, MemOperand(sp, kPointerSize * each.size())); |
| 2730 | __ push(r0); |
| 2731 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2732 | SetValue(&each); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2733 | if (each.size() > 0) { |
| 2734 | __ pop(r0); // discard the value |
| 2735 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2736 | } |
| 2737 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2738 | __ pop(); // pop the i'th entry pushed above |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2739 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
| 2740 | __ jmp(&loop); |
| 2741 | |
| 2742 | // Cleanup. |
| 2743 | __ bind(&cleanup); |
| 2744 | __ bind(node->break_target()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2745 | __ add(sp, sp, Operand(5 * kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2746 | |
| 2747 | // Exit. |
| 2748 | __ bind(&exit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2749 | |
| 2750 | break_stack_height_ -= kForInStackSize; |
| 2751 | } |
| 2752 | |
| 2753 | |
| 2754 | void ArmCodeGenerator::VisitTryCatch(TryCatch* node) { |
| 2755 | Comment cmnt(masm_, "[ TryCatch"); |
| 2756 | |
| 2757 | Label try_block, exit; |
| 2758 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2759 | __ bl(&try_block); |
| 2760 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2761 | // --- Catch block --- |
| 2762 | |
| 2763 | // Store the caught exception in the catch variable. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2764 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2765 | { Reference ref(this, node->catch_var()); |
| 2766 | // Load the exception to the top of the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2767 | __ ldr(r0, MemOperand(sp, ref.size() * kPointerSize)); |
| 2768 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2769 | SetValue(&ref); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2770 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2771 | } |
| 2772 | |
| 2773 | // Remove the exception from the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2774 | __ pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2775 | |
| 2776 | VisitStatements(node->catch_block()->statements()); |
| 2777 | __ b(&exit); |
| 2778 | |
| 2779 | |
| 2780 | // --- Try block --- |
| 2781 | __ bind(&try_block); |
| 2782 | |
| 2783 | __ PushTryHandler(IN_JAVASCRIPT, TRY_CATCH_HANDLER); |
| 2784 | |
| 2785 | // Introduce shadow labels for all escapes from the try block, |
| 2786 | // including returns. We should probably try to unify the escaping |
| 2787 | // labels and the return label. |
| 2788 | int nof_escapes = node->escaping_labels()->length(); |
| 2789 | List<LabelShadow*> shadows(1 + nof_escapes); |
| 2790 | shadows.Add(new LabelShadow(&function_return_)); |
| 2791 | for (int i = 0; i < nof_escapes; i++) { |
| 2792 | shadows.Add(new LabelShadow(node->escaping_labels()->at(i))); |
| 2793 | } |
| 2794 | |
| 2795 | // Generate code for the statements in the try block. |
| 2796 | VisitStatements(node->try_block()->statements()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2797 | __ pop(r0); // Discard the result. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2798 | |
| 2799 | // Stop the introduced shadowing and count the number of required unlinks. |
| 2800 | int nof_unlinks = 0; |
| 2801 | for (int i = 0; i <= nof_escapes; i++) { |
| 2802 | shadows[i]->StopShadowing(); |
| 2803 | if (shadows[i]->is_linked()) nof_unlinks++; |
| 2804 | } |
| 2805 | |
| 2806 | // Unlink from try chain. |
| 2807 | // TOS contains code slot |
| 2808 | const int kNextOffset = StackHandlerConstants::kNextOffset + |
| 2809 | StackHandlerConstants::kAddressDisplacement; |
| 2810 | __ ldr(r1, MemOperand(sp, kNextOffset)); // read next_sp |
| 2811 | __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
| 2812 | __ str(r1, MemOperand(r3)); |
| 2813 | ASSERT(StackHandlerConstants::kCodeOffset == 0); // first field is code |
| 2814 | __ add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| 2815 | // Code slot popped. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2816 | if (nof_unlinks > 0) __ b(&exit); |
| 2817 | |
| 2818 | // Generate unlink code for all used shadow labels. |
| 2819 | for (int i = 0; i <= nof_escapes; i++) { |
| 2820 | if (shadows[i]->is_linked()) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2821 | // Unlink from try chain; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2822 | __ bind(shadows[i]); |
| 2823 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2824 | // Reload sp from the top handler, because some statements that we |
| 2825 | // break from (eg, for...in) may have left stuff on the stack. |
| 2826 | __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
| 2827 | __ ldr(sp, MemOperand(r3)); |
| 2828 | |
| 2829 | __ ldr(r1, MemOperand(sp, kNextOffset)); |
| 2830 | __ str(r1, MemOperand(r3)); |
| 2831 | ASSERT(StackHandlerConstants::kCodeOffset == 0); // first field is code |
| 2832 | __ add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| 2833 | // Code slot popped. |
| 2834 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2835 | __ b(shadows[i]->shadowed()); |
| 2836 | } |
| 2837 | } |
| 2838 | |
| 2839 | __ bind(&exit); |
| 2840 | } |
| 2841 | |
| 2842 | |
| 2843 | void ArmCodeGenerator::VisitTryFinally(TryFinally* node) { |
| 2844 | Comment cmnt(masm_, "[ TryFinally"); |
| 2845 | |
| 2846 | // State: Used to keep track of reason for entering the finally |
| 2847 | // block. Should probably be extended to hold information for |
| 2848 | // break/continue from within the try block. |
| 2849 | enum { FALLING, THROWING, JUMPING }; |
| 2850 | |
| 2851 | Label exit, unlink, try_block, finally_block; |
| 2852 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2853 | __ bl(&try_block); |
| 2854 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2855 | __ push(r0); // save exception object on the stack |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2856 | // In case of thrown exceptions, this is where we continue. |
| 2857 | __ mov(r2, Operand(Smi::FromInt(THROWING))); |
| 2858 | __ b(&finally_block); |
| 2859 | |
| 2860 | |
| 2861 | // --- Try block --- |
| 2862 | __ bind(&try_block); |
| 2863 | |
| 2864 | __ PushTryHandler(IN_JAVASCRIPT, TRY_FINALLY_HANDLER); |
| 2865 | |
| 2866 | // Introduce shadow labels for all escapes from the try block, |
| 2867 | // including returns. We should probably try to unify the escaping |
| 2868 | // labels and the return label. |
| 2869 | int nof_escapes = node->escaping_labels()->length(); |
| 2870 | List<LabelShadow*> shadows(1 + nof_escapes); |
| 2871 | shadows.Add(new LabelShadow(&function_return_)); |
| 2872 | for (int i = 0; i < nof_escapes; i++) { |
| 2873 | shadows.Add(new LabelShadow(node->escaping_labels()->at(i))); |
| 2874 | } |
| 2875 | |
| 2876 | // Generate code for the statements in the try block. |
| 2877 | VisitStatements(node->try_block()->statements()); |
| 2878 | |
| 2879 | // Stop the introduced shadowing and count the number of required |
| 2880 | // unlinks. |
| 2881 | int nof_unlinks = 0; |
| 2882 | for (int i = 0; i <= nof_escapes; i++) { |
| 2883 | shadows[i]->StopShadowing(); |
| 2884 | if (shadows[i]->is_linked()) nof_unlinks++; |
| 2885 | } |
| 2886 | |
| 2887 | // Set the state on the stack to FALLING. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2888 | __ mov(r0, Operand(Factory::undefined_value())); // fake TOS |
| 2889 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2890 | __ mov(r2, Operand(Smi::FromInt(FALLING))); |
| 2891 | if (nof_unlinks > 0) __ b(&unlink); |
| 2892 | |
| 2893 | // Generate code that sets the state for all used shadow labels. |
| 2894 | for (int i = 0; i <= nof_escapes; i++) { |
| 2895 | if (shadows[i]->is_linked()) { |
| 2896 | __ bind(shadows[i]); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2897 | if (shadows[i]->shadowed() == &function_return_) { |
| 2898 | __ push(r0); // Materialize the return value on the stack |
| 2899 | } else { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2900 | // Fake TOS for break and continue (not return). |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2901 | __ mov(r0, Operand(Factory::undefined_value())); |
| 2902 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2903 | } |
| 2904 | __ mov(r2, Operand(Smi::FromInt(JUMPING + i))); |
| 2905 | __ b(&unlink); |
| 2906 | } |
| 2907 | } |
| 2908 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2909 | // Unlink from try chain; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2910 | __ bind(&unlink); |
| 2911 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2912 | __ pop(r0); // Store TOS in r0 across stack manipulation |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2913 | // Reload sp from the top handler, because some statements that we |
| 2914 | // break from (eg, for...in) may have left stuff on the stack. |
| 2915 | __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
| 2916 | __ ldr(sp, MemOperand(r3)); |
| 2917 | const int kNextOffset = StackHandlerConstants::kNextOffset + |
| 2918 | StackHandlerConstants::kAddressDisplacement; |
| 2919 | __ ldr(r1, MemOperand(sp, kNextOffset)); |
| 2920 | __ str(r1, MemOperand(r3)); |
| 2921 | ASSERT(StackHandlerConstants::kCodeOffset == 0); // first field is code |
| 2922 | __ add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| 2923 | // Code slot popped. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2924 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2925 | |
| 2926 | // --- Finally block --- |
| 2927 | __ bind(&finally_block); |
| 2928 | |
| 2929 | // Push the state on the stack. If necessary move the state to a |
| 2930 | // local variable to avoid having extra values on the stack while |
| 2931 | // evaluating the finally block. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2932 | __ push(r2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2933 | if (node->finally_var() != NULL) { |
| 2934 | Reference target(this, node->finally_var()); |
| 2935 | SetValue(&target); |
| 2936 | ASSERT(target.size() == 0); // no extra stuff on the stack |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2937 | __ pop(); // remove the extra avalue that was pushed above |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2938 | } |
| 2939 | |
| 2940 | // Generate code for the statements in the finally block. |
| 2941 | VisitStatements(node->finally_block()->statements()); |
| 2942 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2943 | // Get the state from the stack - or the local variable. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2944 | if (node->finally_var() != NULL) { |
| 2945 | Reference target(this, node->finally_var()); |
| 2946 | GetValue(&target); |
| 2947 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2948 | __ pop(r2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2949 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2950 | __ pop(r0); // Restore value or faked TOS. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2951 | // Generate code that jumps to the right destination for all used |
| 2952 | // shadow labels. |
| 2953 | for (int i = 0; i <= nof_escapes; i++) { |
| 2954 | if (shadows[i]->is_bound()) { |
| 2955 | __ cmp(r2, Operand(Smi::FromInt(JUMPING + i))); |
| 2956 | if (shadows[i]->shadowed() != &function_return_) { |
| 2957 | Label next; |
| 2958 | __ b(ne, &next); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2959 | __ b(shadows[i]->shadowed()); |
| 2960 | __ bind(&next); |
| 2961 | } else { |
| 2962 | __ b(eq, shadows[i]->shadowed()); |
| 2963 | } |
| 2964 | } |
| 2965 | } |
| 2966 | |
| 2967 | // Check if we need to rethrow the exception. |
| 2968 | __ cmp(r2, Operand(Smi::FromInt(THROWING))); |
| 2969 | __ b(ne, &exit); |
| 2970 | |
| 2971 | // Rethrow exception. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2972 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2973 | __ CallRuntime(Runtime::kReThrow, 1); |
| 2974 | |
| 2975 | // Done. |
| 2976 | __ bind(&exit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2977 | } |
| 2978 | |
| 2979 | |
| 2980 | void ArmCodeGenerator::VisitDebuggerStatement(DebuggerStatement* node) { |
| 2981 | Comment cmnt(masm_, "[ DebuggerStatament"); |
| 2982 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 2983 | __ CallRuntime(Runtime::kDebugBreak, 1); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2984 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2985 | } |
| 2986 | |
| 2987 | |
| 2988 | void ArmCodeGenerator::InstantiateBoilerplate(Handle<JSFunction> boilerplate) { |
| 2989 | ASSERT(boilerplate->IsBoilerplate()); |
| 2990 | |
| 2991 | // Push the boilerplate on the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2992 | __ mov(r0, Operand(boilerplate)); |
| 2993 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2994 | |
| 2995 | // Create a new closure. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2996 | __ push(cp); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2997 | __ CallRuntime(Runtime::kNewClosure, 2); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 2998 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2999 | } |
| 3000 | |
| 3001 | |
| 3002 | void ArmCodeGenerator::VisitFunctionLiteral(FunctionLiteral* node) { |
| 3003 | Comment cmnt(masm_, "[ FunctionLiteral"); |
| 3004 | |
| 3005 | // Build the function boilerplate and instantiate it. |
| 3006 | Handle<JSFunction> boilerplate = BuildBoilerplate(node); |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 3007 | // Check for stack-overflow exception. |
| 3008 | if (HasStackOverflow()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3009 | InstantiateBoilerplate(boilerplate); |
| 3010 | } |
| 3011 | |
| 3012 | |
| 3013 | void ArmCodeGenerator::VisitFunctionBoilerplateLiteral( |
| 3014 | FunctionBoilerplateLiteral* node) { |
| 3015 | Comment cmnt(masm_, "[ FunctionBoilerplateLiteral"); |
| 3016 | InstantiateBoilerplate(node->boilerplate()); |
| 3017 | } |
| 3018 | |
| 3019 | |
| 3020 | void ArmCodeGenerator::VisitConditional(Conditional* node) { |
| 3021 | Comment cmnt(masm_, "[ Conditional"); |
| 3022 | Label then, else_, exit; |
| 3023 | LoadCondition(node->condition(), CodeGenState::LOAD, &then, &else_, true); |
| 3024 | Branch(false, &else_); |
| 3025 | __ bind(&then); |
| 3026 | Load(node->then_expression(), access()); |
| 3027 | __ b(&exit); |
| 3028 | __ bind(&else_); |
| 3029 | Load(node->else_expression(), access()); |
| 3030 | __ bind(&exit); |
| 3031 | } |
| 3032 | |
| 3033 | |
| 3034 | void ArmCodeGenerator::VisitSlot(Slot* node) { |
| 3035 | Comment cmnt(masm_, "[ Slot"); |
| 3036 | |
| 3037 | if (node->type() == Slot::LOOKUP) { |
| 3038 | ASSERT(node->var()->mode() == Variable::DYNAMIC); |
| 3039 | |
| 3040 | // For now, just do a runtime call. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3041 | __ push(cp); |
| 3042 | __ mov(r0, Operand(node->var()->name())); |
| 3043 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3044 | |
| 3045 | switch (access()) { |
| 3046 | case CodeGenState::UNDEFINED: |
| 3047 | UNREACHABLE(); |
| 3048 | break; |
| 3049 | |
| 3050 | case CodeGenState::LOAD: |
| 3051 | __ CallRuntime(Runtime::kLoadContextSlot, 2); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3052 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3053 | break; |
| 3054 | |
| 3055 | case CodeGenState::LOAD_TYPEOF_EXPR: |
| 3056 | __ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3057 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3058 | break; |
| 3059 | |
| 3060 | case CodeGenState::STORE: |
| 3061 | // Storing a variable must keep the (new) value on the stack. This |
| 3062 | // is necessary for compiling assignment expressions. |
| 3063 | __ CallRuntime(Runtime::kStoreContextSlot, 3); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3064 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3065 | // result (TOS) is the value that was stored |
| 3066 | break; |
| 3067 | |
| 3068 | case CodeGenState::INIT_CONST: |
| 3069 | // Same as STORE but ignores attribute (e.g. READ_ONLY) of |
| 3070 | // context slot so that we can initialize const properties |
| 3071 | // (introduced via eval("const foo = (some expr);")). Also, |
| 3072 | // uses the current function context instead of the top |
| 3073 | // context. |
| 3074 | // |
| 3075 | // Note that we must declare the foo upon entry of eval(), |
| 3076 | // via a context slot declaration, but we cannot initialize |
| 3077 | // it at the same time, because the const declaration may |
| 3078 | // be at the end of the eval code (sigh...) and the const |
| 3079 | // variable may have been used before (where its value is |
| 3080 | // 'undefined'). Thus, we can only do the initialization |
| 3081 | // when we actually encounter the expression and when the |
| 3082 | // expression operands are defined and valid, and thus we |
| 3083 | // need the split into 2 operations: declaration of the |
| 3084 | // context slot followed by initialization. |
| 3085 | __ CallRuntime(Runtime::kInitializeConstContextSlot, 3); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3086 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3087 | break; |
| 3088 | } |
| 3089 | |
| 3090 | } else { |
| 3091 | // Note: We would like to keep the assert below, but it fires because |
| 3092 | // of some nasty code in LoadTypeofExpression() which should be removed... |
| 3093 | // ASSERT(node->var()->mode() != Variable::DYNAMIC); |
| 3094 | |
| 3095 | switch (access()) { |
| 3096 | case CodeGenState::UNDEFINED: |
| 3097 | UNREACHABLE(); |
| 3098 | break; |
| 3099 | |
| 3100 | case CodeGenState::LOAD: // fall through |
| 3101 | case CodeGenState::LOAD_TYPEOF_EXPR: |
| 3102 | // Special handling for locals allocated in registers. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3103 | __ ldr(r0, SlotOperand(node, r2)); |
| 3104 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3105 | if (node->var()->mode() == Variable::CONST) { |
| 3106 | // Const slots may contain 'the hole' value (the constant hasn't |
| 3107 | // been initialized yet) which needs to be converted into the |
| 3108 | // 'undefined' value. |
| 3109 | Comment cmnt(masm_, "[ Unhole const"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3110 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3111 | __ cmp(r0, Operand(Factory::the_hole_value())); |
| 3112 | __ mov(r0, Operand(Factory::undefined_value()), LeaveCC, eq); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3113 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3114 | } |
| 3115 | break; |
| 3116 | |
| 3117 | case CodeGenState::INIT_CONST: { |
| 3118 | ASSERT(node->var()->mode() == Variable::CONST); |
| 3119 | // Only the first const initialization must be executed (the slot |
| 3120 | // still contains 'the hole' value). When the assignment is executed, |
| 3121 | // the code is identical to a normal store (see below). |
| 3122 | { Comment cmnt(masm_, "[ Init const"); |
| 3123 | Label L; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3124 | __ ldr(r2, SlotOperand(node, r2)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3125 | __ cmp(r2, Operand(Factory::the_hole_value())); |
| 3126 | __ b(ne, &L); |
| 3127 | // We must execute the store. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3128 | // r2 may be loaded with context; used below in RecordWrite. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3129 | __ ldr(r0, MemOperand(sp, 0)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3130 | __ str(r0, SlotOperand(node, r2)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3131 | if (node->type() == Slot::CONTEXT) { |
| 3132 | // Skip write barrier if the written value is a smi. |
| 3133 | Label exit; |
| 3134 | __ tst(r0, Operand(kSmiTagMask)); |
| 3135 | __ b(eq, &exit); |
| 3136 | // r2 is loaded with context when calling SlotOperand above. |
| 3137 | int offset = FixedArray::kHeaderSize + node->index() * kPointerSize; |
| 3138 | __ mov(r3, Operand(offset)); |
| 3139 | __ RecordWrite(r2, r3, r1); |
| 3140 | __ bind(&exit); |
| 3141 | } |
| 3142 | __ bind(&L); |
| 3143 | } |
| 3144 | break; |
| 3145 | } |
| 3146 | |
| 3147 | case CodeGenState::STORE: { |
| 3148 | // Storing a variable must keep the (new) value on the stack. This |
| 3149 | // is necessary for compiling assignment expressions. |
| 3150 | // Special handling for locals allocated in registers. |
| 3151 | // |
| 3152 | // Note: We will reach here even with node->var()->mode() == |
| 3153 | // Variable::CONST because of const declarations which will |
| 3154 | // initialize consts to 'the hole' value and by doing so, end |
| 3155 | // up calling this code. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3156 | // r2 may be loaded with context; used below in RecordWrite. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3157 | __ pop(r0); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3158 | __ str(r0, SlotOperand(node, r2)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3159 | if (node->type() == Slot::CONTEXT) { |
| 3160 | // Skip write barrier if the written value is a smi. |
| 3161 | Label exit; |
| 3162 | __ tst(r0, Operand(kSmiTagMask)); |
| 3163 | __ b(eq, &exit); |
| 3164 | // r2 is loaded with context when calling SlotOperand above. |
| 3165 | int offset = FixedArray::kHeaderSize + node->index() * kPointerSize; |
| 3166 | __ mov(r3, Operand(offset)); |
| 3167 | __ RecordWrite(r2, r3, r1); |
| 3168 | __ bind(&exit); |
| 3169 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3170 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3171 | break; |
| 3172 | } |
| 3173 | } |
| 3174 | } |
| 3175 | } |
| 3176 | |
| 3177 | |
| 3178 | void ArmCodeGenerator::VisitVariableProxy(VariableProxy* proxy_node) { |
| 3179 | Comment cmnt(masm_, "[ VariableProxy"); |
| 3180 | Variable* node = proxy_node->var(); |
| 3181 | |
| 3182 | Expression* x = node->rewrite(); |
| 3183 | if (x != NULL) { |
| 3184 | Visit(x); |
| 3185 | return; |
| 3186 | } |
| 3187 | |
| 3188 | ASSERT(node->is_global()); |
| 3189 | if (is_referenced()) { |
| 3190 | if (node->AsProperty() != NULL) { |
| 3191 | __ RecordPosition(node->AsProperty()->position()); |
| 3192 | } |
| 3193 | AccessReferenceProperty(new Literal(node->name()), access()); |
| 3194 | |
| 3195 | } else { |
| 3196 | // All stores are through references. |
| 3197 | ASSERT(access() != CodeGenState::STORE); |
| 3198 | Reference property(this, proxy_node); |
| 3199 | GetValue(&property); |
| 3200 | } |
| 3201 | } |
| 3202 | |
| 3203 | |
| 3204 | void ArmCodeGenerator::VisitLiteral(Literal* node) { |
| 3205 | Comment cmnt(masm_, "[ Literal"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3206 | __ mov(r0, Operand(node->handle())); |
| 3207 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3208 | } |
| 3209 | |
| 3210 | |
| 3211 | void ArmCodeGenerator::VisitRegExpLiteral(RegExpLiteral* node) { |
| 3212 | Comment cmnt(masm_, "[ RexExp Literal"); |
| 3213 | |
| 3214 | // Retrieve the literal array and check the allocated entry. |
| 3215 | |
| 3216 | // Load the function of this activation. |
| 3217 | __ ldr(r1, MemOperand(pp, 0)); |
| 3218 | |
| 3219 | // Load the literals array of the function. |
| 3220 | __ ldr(r1, FieldMemOperand(r1, JSFunction::kLiteralsOffset)); |
| 3221 | |
| 3222 | // Load the literal at the ast saved index. |
| 3223 | int literal_offset = |
| 3224 | FixedArray::kHeaderSize + node->literal_index() * kPointerSize; |
| 3225 | __ ldr(r2, FieldMemOperand(r1, literal_offset)); |
| 3226 | |
| 3227 | Label done; |
| 3228 | __ cmp(r2, Operand(Factory::undefined_value())); |
| 3229 | __ b(ne, &done); |
| 3230 | |
| 3231 | // If the entry is undefined we call the runtime system to computed |
| 3232 | // the literal. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3233 | __ push(r1); // literal array (0) |
| 3234 | __ mov(r0, Operand(Smi::FromInt(node->literal_index()))); |
| 3235 | __ push(r0); // literal index (1) |
| 3236 | __ mov(r0, Operand(node->pattern())); // RegExp pattern (2) |
| 3237 | __ push(r0); |
| 3238 | __ mov(r0, Operand(node->flags())); // RegExp flags (3) |
| 3239 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3240 | __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3241 | __ mov(r2, Operand(r0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3242 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3243 | __ bind(&done); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3244 | // Push the literal. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3245 | __ push(r2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3246 | } |
| 3247 | |
| 3248 | |
| 3249 | // This deferred code stub will be used for creating the boilerplate |
| 3250 | // by calling Runtime_CreateObjectLiteral. |
| 3251 | // Each created boilerplate is stored in the JSFunction and they are |
| 3252 | // therefore context dependent. |
| 3253 | class ObjectLiteralDeferred: public DeferredCode { |
| 3254 | public: |
| 3255 | ObjectLiteralDeferred(CodeGenerator* generator, ObjectLiteral* node) |
| 3256 | : DeferredCode(generator), node_(node) { |
| 3257 | set_comment("[ ObjectLiteralDeferred"); |
| 3258 | } |
| 3259 | virtual void Generate(); |
| 3260 | private: |
| 3261 | ObjectLiteral* node_; |
| 3262 | }; |
| 3263 | |
| 3264 | |
| 3265 | void ObjectLiteralDeferred::Generate() { |
| 3266 | // If the entry is undefined we call the runtime system to computed |
| 3267 | // the literal. |
| 3268 | |
| 3269 | // Literal array (0). |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3270 | __ push(r1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3271 | // Literal index (1). |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3272 | __ mov(r0, Operand(Smi::FromInt(node_->literal_index()))); |
| 3273 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3274 | // Constant properties (2). |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3275 | __ mov(r0, Operand(node_->constant_properties())); |
| 3276 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3277 | __ CallRuntime(Runtime::kCreateObjectLiteralBoilerplate, 3); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3278 | __ mov(r2, Operand(r0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3279 | } |
| 3280 | |
| 3281 | |
| 3282 | void ArmCodeGenerator::VisitObjectLiteral(ObjectLiteral* node) { |
| 3283 | Comment cmnt(masm_, "[ ObjectLiteral"); |
| 3284 | |
| 3285 | ObjectLiteralDeferred* deferred = new ObjectLiteralDeferred(this, node); |
| 3286 | |
| 3287 | // Retrieve the literal array and check the allocated entry. |
| 3288 | |
| 3289 | // Load the function of this activation. |
| 3290 | __ ldr(r1, MemOperand(pp, 0)); |
| 3291 | |
| 3292 | // Load the literals array of the function. |
| 3293 | __ ldr(r1, FieldMemOperand(r1, JSFunction::kLiteralsOffset)); |
| 3294 | |
| 3295 | // Load the literal at the ast saved index. |
| 3296 | int literal_offset = |
| 3297 | FixedArray::kHeaderSize + node->literal_index() * kPointerSize; |
| 3298 | __ ldr(r2, FieldMemOperand(r1, literal_offset)); |
| 3299 | |
| 3300 | // Check whether we need to materialize the object literal boilerplate. |
| 3301 | // If so, jump to the deferred code. |
| 3302 | __ cmp(r2, Operand(Factory::undefined_value())); |
| 3303 | __ b(eq, deferred->enter()); |
| 3304 | __ bind(deferred->exit()); |
| 3305 | |
| 3306 | // Push the object literal boilerplate. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3307 | __ push(r2); |
| 3308 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3309 | // Clone the boilerplate object. |
| 3310 | __ CallRuntime(Runtime::kCloneObjectLiteralBoilerplate, 1); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3311 | __ push(r0); // save the result |
| 3312 | // r0: cloned object literal |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3313 | |
| 3314 | for (int i = 0; i < node->properties()->length(); i++) { |
| 3315 | ObjectLiteral::Property* property = node->properties()->at(i); |
| 3316 | Literal* key = property->key(); |
| 3317 | Expression* value = property->value(); |
| 3318 | switch (property->kind()) { |
| 3319 | case ObjectLiteral::Property::CONSTANT: break; |
| 3320 | case ObjectLiteral::Property::COMPUTED: // fall through |
| 3321 | case ObjectLiteral::Property::PROTOTYPE: { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3322 | __ push(r0); // dup the result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3323 | Load(key); |
| 3324 | Load(value); |
| 3325 | __ CallRuntime(Runtime::kSetProperty, 3); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3326 | // restore r0 |
| 3327 | __ ldr(r0, MemOperand(sp, 0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3328 | break; |
| 3329 | } |
| 3330 | case ObjectLiteral::Property::SETTER: { |
| 3331 | __ push(r0); |
| 3332 | Load(key); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3333 | __ mov(r0, Operand(Smi::FromInt(1))); |
| 3334 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3335 | Load(value); |
| 3336 | __ CallRuntime(Runtime::kDefineAccessor, 4); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3337 | __ ldr(r0, MemOperand(sp, 0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3338 | break; |
| 3339 | } |
| 3340 | case ObjectLiteral::Property::GETTER: { |
| 3341 | __ push(r0); |
| 3342 | Load(key); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3343 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 3344 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3345 | Load(value); |
| 3346 | __ CallRuntime(Runtime::kDefineAccessor, 4); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3347 | __ ldr(r0, MemOperand(sp, 0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3348 | break; |
| 3349 | } |
| 3350 | } |
| 3351 | } |
| 3352 | } |
| 3353 | |
| 3354 | |
| 3355 | void ArmCodeGenerator::VisitArrayLiteral(ArrayLiteral* node) { |
| 3356 | Comment cmnt(masm_, "[ ArrayLiteral"); |
| 3357 | // Load the resulting object. |
| 3358 | Load(node->result()); |
| 3359 | for (int i = 0; i < node->values()->length(); i++) { |
| 3360 | Expression* value = node->values()->at(i); |
| 3361 | |
| 3362 | // If value is literal the property value is already |
| 3363 | // set in the boilerplate object. |
| 3364 | if (value->AsLiteral() == NULL) { |
| 3365 | // The property must be set by generated code. |
| 3366 | Load(value); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3367 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3368 | |
| 3369 | // Fetch the object literal |
| 3370 | __ ldr(r1, MemOperand(sp, 0)); |
| 3371 | // Get the elements array. |
| 3372 | __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset)); |
| 3373 | |
| 3374 | // Write to the indexed properties array. |
| 3375 | int offset = i * kPointerSize + Array::kHeaderSize; |
| 3376 | __ str(r0, FieldMemOperand(r1, offset)); |
| 3377 | |
| 3378 | // Update the write barrier for the array address. |
| 3379 | __ mov(r3, Operand(offset)); |
| 3380 | __ RecordWrite(r1, r3, r2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3381 | } |
| 3382 | } |
| 3383 | } |
| 3384 | |
| 3385 | |
| 3386 | void ArmCodeGenerator::VisitAssignment(Assignment* node) { |
| 3387 | Comment cmnt(masm_, "[ Assignment"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3388 | if (FLAG_debug_info) RecordStatementPosition(node); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3389 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3390 | Reference target(this, node->target()); |
| 3391 | if (target.is_illegal()) return; |
| 3392 | |
| 3393 | if (node->op() == Token::ASSIGN || |
| 3394 | node->op() == Token::INIT_VAR || |
| 3395 | node->op() == Token::INIT_CONST) { |
| 3396 | Load(node->value()); |
| 3397 | |
| 3398 | } else { |
| 3399 | GetValue(&target); |
| 3400 | Literal* literal = node->value()->AsLiteral(); |
| 3401 | if (literal != NULL && literal->handle()->IsSmi()) { |
| 3402 | SmiOperation(node->binary_op(), literal->handle(), false); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3403 | __ push(r0); |
| 3404 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3405 | } else { |
| 3406 | Load(node->value()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3407 | GenericBinaryOperation(node->binary_op()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3408 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3409 | } |
| 3410 | } |
| 3411 | |
| 3412 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 3413 | if (var != NULL && |
| 3414 | (var->mode() == Variable::CONST) && |
| 3415 | node->op() != Token::INIT_VAR && node->op() != Token::INIT_CONST) { |
| 3416 | // Assignment ignored - leave the value on the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3417 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3418 | } else { |
| 3419 | __ RecordPosition(node->position()); |
| 3420 | if (node->op() == Token::INIT_CONST) { |
| 3421 | // Dynamic constant initializations must use the function context |
| 3422 | // and initialize the actual constant declared. Dynamic variable |
| 3423 | // initializations are simply assignments and use SetValue. |
| 3424 | InitConst(&target); |
| 3425 | } else { |
| 3426 | SetValue(&target); |
| 3427 | } |
| 3428 | } |
| 3429 | } |
| 3430 | |
| 3431 | |
| 3432 | void ArmCodeGenerator::VisitThrow(Throw* node) { |
| 3433 | Comment cmnt(masm_, "[ Throw"); |
| 3434 | |
| 3435 | Load(node->exception()); |
| 3436 | __ RecordPosition(node->position()); |
| 3437 | __ CallRuntime(Runtime::kThrow, 1); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3438 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3439 | } |
| 3440 | |
| 3441 | |
| 3442 | void ArmCodeGenerator::VisitProperty(Property* node) { |
| 3443 | Comment cmnt(masm_, "[ Property"); |
| 3444 | if (is_referenced()) { |
| 3445 | __ RecordPosition(node->position()); |
| 3446 | AccessReferenceProperty(node->key(), access()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3447 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3448 | } else { |
| 3449 | // All stores are through references. |
| 3450 | ASSERT(access() != CodeGenState::STORE); |
| 3451 | Reference property(this, node); |
| 3452 | __ RecordPosition(node->position()); |
| 3453 | GetValue(&property); |
| 3454 | } |
| 3455 | } |
| 3456 | |
| 3457 | |
| 3458 | void ArmCodeGenerator::VisitCall(Call* node) { |
| 3459 | Comment cmnt(masm_, "[ Call"); |
| 3460 | |
| 3461 | ZoneList<Expression*>* args = node->arguments(); |
| 3462 | |
| 3463 | if (FLAG_debug_info) RecordStatementPosition(node); |
| 3464 | // Standard function call. |
| 3465 | |
| 3466 | // Check if the function is a variable or a property. |
| 3467 | Expression* function = node->expression(); |
| 3468 | Variable* var = function->AsVariableProxy()->AsVariable(); |
| 3469 | Property* property = function->AsProperty(); |
| 3470 | |
| 3471 | // ------------------------------------------------------------------------ |
| 3472 | // Fast-case: Use inline caching. |
| 3473 | // --- |
| 3474 | // According to ECMA-262, section 11.2.3, page 44, the function to call |
| 3475 | // must be resolved after the arguments have been evaluated. The IC code |
| 3476 | // automatically handles this by loading the arguments before the function |
| 3477 | // is resolved in cache misses (this also holds for megamorphic calls). |
| 3478 | // ------------------------------------------------------------------------ |
| 3479 | |
| 3480 | if (var != NULL && !var->is_this() && var->is_global()) { |
| 3481 | // ---------------------------------- |
| 3482 | // JavaScript example: 'foo(1, 2, 3)' // foo is global |
| 3483 | // ---------------------------------- |
| 3484 | |
| 3485 | // Push the name of the function and the receiver onto the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3486 | __ mov(r0, Operand(var->name())); |
| 3487 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3488 | LoadGlobal(); |
| 3489 | |
| 3490 | // Load the arguments. |
| 3491 | for (int i = 0; i < args->length(); i++) Load(args->at(i)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3492 | |
| 3493 | // Setup the receiver register and call the IC initialization code. |
| 3494 | Handle<Code> stub = ComputeCallInitialize(args->length()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3495 | __ RecordPosition(node->position()); |
| 3496 | __ Call(stub, code_target_context); |
| 3497 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3498 | // Remove the function from the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3499 | __ pop(); |
| 3500 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3501 | |
| 3502 | } else if (var != NULL && var->slot() != NULL && |
| 3503 | var->slot()->type() == Slot::LOOKUP) { |
| 3504 | // ---------------------------------- |
| 3505 | // JavaScript example: 'with (obj) foo(1, 2, 3)' // foo is in obj |
| 3506 | // ---------------------------------- |
| 3507 | |
| 3508 | // Load the function |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3509 | __ push(cp); |
| 3510 | __ mov(r0, Operand(var->name())); |
| 3511 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3512 | __ CallRuntime(Runtime::kLoadContextSlot, 2); |
| 3513 | // r0: slot value; r1: receiver |
| 3514 | |
| 3515 | // Load the receiver. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3516 | __ push(r0); // function |
| 3517 | __ push(r1); // receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3518 | |
| 3519 | // Call the function. |
| 3520 | CallWithArguments(args, node->position()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3521 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3522 | |
| 3523 | } else if (property != NULL) { |
| 3524 | // Check if the key is a literal string. |
| 3525 | Literal* literal = property->key()->AsLiteral(); |
| 3526 | |
| 3527 | if (literal != NULL && literal->handle()->IsSymbol()) { |
| 3528 | // ------------------------------------------------------------------ |
| 3529 | // JavaScript example: 'object.foo(1, 2, 3)' or 'map["key"](1, 2, 3)' |
| 3530 | // ------------------------------------------------------------------ |
| 3531 | |
| 3532 | // Push the name of the function and the receiver onto the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3533 | __ mov(r0, Operand(literal->handle())); |
| 3534 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3535 | Load(property->obj()); |
| 3536 | |
| 3537 | // Load the arguments. |
| 3538 | for (int i = 0; i < args->length(); i++) Load(args->at(i)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3539 | |
| 3540 | // Set the receiver register and call the IC initialization code. |
| 3541 | Handle<Code> stub = ComputeCallInitialize(args->length()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3542 | __ RecordPosition(node->position()); |
| 3543 | __ Call(stub, code_target); |
| 3544 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 3545 | |
| 3546 | // Remove the function from the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3547 | __ pop(); |
| 3548 | |
| 3549 | __ push(r0); // push after get rid of function from the stack |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3550 | |
| 3551 | } else { |
| 3552 | // ------------------------------------------- |
| 3553 | // JavaScript example: 'array[index](1, 2, 3)' |
| 3554 | // ------------------------------------------- |
| 3555 | |
| 3556 | // Load the function to call from the property through a reference. |
| 3557 | Reference ref(this, property); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3558 | GetValue(&ref); // receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3559 | |
| 3560 | // Pass receiver to called function. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3561 | __ ldr(r0, MemOperand(sp, ref.size() * kPointerSize)); |
| 3562 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3563 | // Call the function. |
| 3564 | CallWithArguments(args, node->position()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3565 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3566 | } |
| 3567 | |
| 3568 | } else { |
| 3569 | // ---------------------------------- |
| 3570 | // JavaScript example: 'foo(1, 2, 3)' // foo is not global |
| 3571 | // ---------------------------------- |
| 3572 | |
| 3573 | // Load the function. |
| 3574 | Load(function); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3575 | // Pass the global object as the receiver. |
| 3576 | LoadGlobal(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3577 | // Call the function. |
| 3578 | CallWithArguments(args, node->position()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3579 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3580 | } |
| 3581 | } |
| 3582 | |
| 3583 | |
| 3584 | void ArmCodeGenerator::VisitCallNew(CallNew* node) { |
| 3585 | Comment cmnt(masm_, "[ CallNew"); |
| 3586 | |
| 3587 | // According to ECMA-262, section 11.2.2, page 44, the function |
| 3588 | // expression in new calls must be evaluated before the |
| 3589 | // arguments. This is different from ordinary calls, where the |
| 3590 | // actual function to call is resolved after the arguments have been |
| 3591 | // evaluated. |
| 3592 | |
| 3593 | // Compute function to call and use the global object as the |
| 3594 | // receiver. |
| 3595 | Load(node->expression()); |
| 3596 | LoadGlobal(); |
| 3597 | |
| 3598 | // Push the arguments ("left-to-right") on the stack. |
| 3599 | ZoneList<Expression*>* args = node->arguments(); |
| 3600 | for (int i = 0; i < args->length(); i++) Load(args->at(i)); |
| 3601 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3602 | // r0: the number of arguments. |
| 3603 | __ mov(r0, Operand(args->length())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3604 | |
| 3605 | // Call the construct call builtin that handles allocation and |
| 3606 | // constructor invocation. |
| 3607 | __ RecordPosition(position); |
| 3608 | __ Call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)), |
| 3609 | js_construct_call); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3610 | |
| 3611 | // Discard old TOS value and push r0 on the stack (same as Pop(), push(r0)). |
| 3612 | __ str(r0, MemOperand(sp, 0 * kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3613 | } |
| 3614 | |
| 3615 | |
| 3616 | void ArmCodeGenerator::GenerateSetThisFunction(ZoneList<Expression*>* args) { |
| 3617 | ASSERT(args->length() == 1); |
| 3618 | Load(args->at(0)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3619 | __ ldr(r0, MemOperand(sp, 0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3620 | __ str(r0, MemOperand(pp, JavaScriptFrameConstants::kFunctionOffset)); |
| 3621 | } |
| 3622 | |
| 3623 | |
| 3624 | void ArmCodeGenerator::GenerateGetThisFunction(ZoneList<Expression*>* args) { |
| 3625 | ASSERT(args->length() == 0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3626 | __ ldr(r0, MemOperand(pp, JavaScriptFrameConstants::kFunctionOffset)); |
| 3627 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3628 | } |
| 3629 | |
| 3630 | |
| 3631 | void ArmCodeGenerator::GenerateSetThis(ZoneList<Expression*>* args) { |
| 3632 | ASSERT(args->length() == 1); |
| 3633 | Load(args->at(0)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3634 | __ ldr(r0, MemOperand(sp, 0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3635 | __ str(r0, MemOperand(pp, JavaScriptFrameConstants::kReceiverOffset)); |
| 3636 | } |
| 3637 | |
| 3638 | |
| 3639 | void ArmCodeGenerator::GenerateSetArgumentsLength(ZoneList<Expression*>* args) { |
| 3640 | ASSERT(args->length() == 1); |
| 3641 | Load(args->at(0)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3642 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3643 | __ mov(r0, Operand(r0, LSR, kSmiTagSize)); |
| 3644 | __ str(r0, MemOperand(fp, JavaScriptFrameConstants::kArgsLengthOffset)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3645 | __ mov(r0, Operand(Smi::FromInt(0))); // return a meaningful value |
| 3646 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3647 | } |
| 3648 | |
| 3649 | |
| 3650 | void ArmCodeGenerator::GenerateGetArgumentsLength(ZoneList<Expression*>* args) { |
| 3651 | ASSERT(args->length() == 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3652 | __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kArgsLengthOffset)); |
| 3653 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3654 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3655 | } |
| 3656 | |
| 3657 | |
| 3658 | void ArmCodeGenerator::GenerateValueOf(ZoneList<Expression*>* args) { |
| 3659 | ASSERT(args->length() == 1); |
| 3660 | Label leave; |
| 3661 | Load(args->at(0)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3662 | __ pop(r0); // r0 contains object. |
| 3663 | // if (object->IsSmi()) return the object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3664 | __ tst(r0, Operand(kSmiTagMask)); |
| 3665 | __ b(eq, &leave); |
| 3666 | // It is a heap object - get map. |
| 3667 | __ ldr(r1, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 3668 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3669 | // if (!object->IsJSValue()) return the object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3670 | __ cmp(r1, Operand(JS_VALUE_TYPE)); |
| 3671 | __ b(ne, &leave); |
| 3672 | // Load the value. |
| 3673 | __ ldr(r0, FieldMemOperand(r0, JSValue::kValueOffset)); |
| 3674 | __ bind(&leave); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3675 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3676 | } |
| 3677 | |
| 3678 | |
| 3679 | void ArmCodeGenerator::GenerateSetValueOf(ZoneList<Expression*>* args) { |
| 3680 | ASSERT(args->length() == 2); |
| 3681 | Label leave; |
| 3682 | Load(args->at(0)); // Load the object. |
| 3683 | Load(args->at(1)); // Load the value. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3684 | __ pop(r0); // r0 contains value |
| 3685 | __ pop(r1); // r1 contains object |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3686 | // if (object->IsSmi()) return object. |
| 3687 | __ tst(r1, Operand(kSmiTagMask)); |
| 3688 | __ b(eq, &leave); |
| 3689 | // It is a heap object - get map. |
| 3690 | __ ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 3691 | __ ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
| 3692 | // if (!object->IsJSValue()) return object. |
| 3693 | __ cmp(r2, Operand(JS_VALUE_TYPE)); |
| 3694 | __ b(ne, &leave); |
| 3695 | // Store the value. |
| 3696 | __ str(r0, FieldMemOperand(r1, JSValue::kValueOffset)); |
| 3697 | // Update the write barrier. |
| 3698 | __ mov(r2, Operand(JSValue::kValueOffset - kHeapObjectTag)); |
| 3699 | __ RecordWrite(r1, r2, r3); |
| 3700 | // Leave. |
| 3701 | __ bind(&leave); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3702 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3703 | } |
| 3704 | |
| 3705 | |
| 3706 | void ArmCodeGenerator::GenerateTailCallWithArguments( |
| 3707 | ZoneList<Expression*>* args) { |
| 3708 | // r0 = number of arguments (smi) |
| 3709 | ASSERT(args->length() == 1); |
| 3710 | Load(args->at(0)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3711 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3712 | __ mov(r0, Operand(r0, LSR, kSmiTagSize)); |
| 3713 | |
| 3714 | // r1 = new function (previously written to stack) |
| 3715 | __ ldr(r1, MemOperand(pp, JavaScriptFrameConstants::kFunctionOffset)); |
| 3716 | |
| 3717 | // Reset parameter pointer and frame pointer to previous frame |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3718 | ExitJSFrame(DO_NOT_RETURN); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3719 | |
| 3720 | // Jump (tail-call) to the function in register r1. |
| 3721 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 3722 | __ ldr(r1, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 3723 | __ ldr(r1, FieldMemOperand(r1, SharedFunctionInfo::kCodeOffset)); |
| 3724 | __ add(pc, r1, Operand(Code::kHeaderSize - kHeapObjectTag)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3725 | } |
| 3726 | |
| 3727 | |
| 3728 | void ArmCodeGenerator::GenerateSetArgument(ZoneList<Expression*>* args) { |
| 3729 | ASSERT(args->length() == 3); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3730 | // r0 = args[i]; r1 = i |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3731 | Comment cmnt(masm_, "[ GenerateSetArgument"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3732 | Load(args->at(1)); // args[i] (value) |
| 3733 | Load(args->at(0)); // i |
| 3734 | __ pop(r1); // i |
| 3735 | __ pop(r0); // value |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3736 | #if defined(DEBUG) |
| 3737 | { Label L; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3738 | __ tst(r1, Operand(kSmiTagMask)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3739 | __ b(eq, &L); |
| 3740 | __ stop("SMI expected"); |
| 3741 | __ bind(&L); |
| 3742 | } |
| 3743 | #endif // defined(DEBUG) |
| 3744 | __ add(r2, pp, Operand(JavaScriptFrameConstants::kParam0Offset)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3745 | __ str(r0, |
| 3746 | MemOperand(r2, r1, LSL, kPointerSizeLog2 - kSmiTagSize, NegOffset)); |
| 3747 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3748 | } |
| 3749 | |
| 3750 | |
| 3751 | void ArmCodeGenerator::GenerateSquashFrame(ZoneList<Expression*>* args) { |
| 3752 | ASSERT(args->length() == 2); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3753 | Load(args->at(0)); // old number of arguments |
| 3754 | Load(args->at(1)); // new number of arguments, r1 > r0 |
| 3755 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3756 | __ mov(r0, Operand(r0, LSR, kSmiTagSize)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3757 | __ pop(r1); |
| 3758 | __ mov(r1, Operand(r1, LSR, kSmiTagSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3759 | // r1 = number of words to move stack. |
| 3760 | __ sub(r1, r1, Operand(r0)); |
| 3761 | // r2 is source. |
| 3762 | __ add(r2, fp, Operand(StandardFrameConstants::kCallerPCOffset)); |
| 3763 | // Move down frame pointer fp. |
| 3764 | __ add(fp, fp, Operand(r1, LSL, kPointerSizeLog2)); |
| 3765 | // r1 is destination. |
| 3766 | __ add(r1, fp, Operand(StandardFrameConstants::kCallerPCOffset)); |
| 3767 | |
| 3768 | Label move; |
| 3769 | __ bind(&move); |
| 3770 | __ ldr(r3, MemOperand(r2, -kPointerSize, PostIndex)); |
| 3771 | __ str(r3, MemOperand(r1, -kPointerSize, PostIndex)); |
| 3772 | __ cmp(r2, Operand(sp)); |
| 3773 | __ b(ne, &move); |
| 3774 | __ ldr(r3, MemOperand(r2)); |
| 3775 | __ str(r3, MemOperand(r1)); |
| 3776 | |
| 3777 | // Move down stack pointer esp. |
| 3778 | __ mov(sp, Operand(r1)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3779 | // Put something GC-able in r0. |
| 3780 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 3781 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3782 | } |
| 3783 | |
| 3784 | |
| 3785 | void ArmCodeGenerator::GenerateExpandFrame(ZoneList<Expression*>* args) { |
| 3786 | ASSERT(args->length() == 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3787 | Load(args->at(1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3788 | Load(args->at(0)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3789 | __ pop(r0); // new number of arguments |
| 3790 | __ pop(r1); // old number of arguments, r1 > r0 |
| 3791 | __ mov(r1, Operand(r1, LSR, kSmiTagSize)); |
| 3792 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3793 | // r1 = number of words to move stack. |
| 3794 | __ sub(r1, r1, Operand(r0, LSR, kSmiTagSize)); |
| 3795 | Label end_of_expand_frame; |
| 3796 | if (FLAG_check_stack) { |
| 3797 | Label not_too_big; |
| 3798 | __ sub(r2, sp, Operand(r1, LSL, kPointerSizeLog2)); |
| 3799 | __ mov(ip, Operand(ExternalReference::address_of_stack_guard_limit())); |
| 3800 | __ ldr(ip, MemOperand(ip)); |
| 3801 | __ cmp(r2, Operand(ip)); |
| 3802 | __ b(gt, ¬_too_big); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3803 | __ mov(r0, Operand(Factory::false_value())); |
| 3804 | __ b(&end_of_expand_frame); |
| 3805 | __ bind(¬_too_big); |
| 3806 | } |
| 3807 | // r3 is source. |
| 3808 | __ mov(r3, Operand(sp)); |
| 3809 | // r0 is copy limit + 1 word |
| 3810 | __ add(r0, fp, |
| 3811 | Operand(StandardFrameConstants::kCallerPCOffset + kPointerSize)); |
| 3812 | // Move up frame pointer fp. |
| 3813 | __ sub(fp, fp, Operand(r1, LSL, kPointerSizeLog2)); |
| 3814 | // Move up stack pointer sp. |
| 3815 | __ sub(sp, sp, Operand(r1, LSL, kPointerSizeLog2)); |
| 3816 | // r1 is destination (r1 = source - r1). |
| 3817 | __ mov(r2, Operand(0)); |
| 3818 | __ sub(r2, r2, Operand(r1, LSL, kPointerSizeLog2)); |
| 3819 | __ add(r1, r3, Operand(r2)); |
| 3820 | |
| 3821 | Label move; |
| 3822 | __ bind(&move); |
| 3823 | __ ldr(r2, MemOperand(r3, kPointerSize, PostIndex)); |
| 3824 | __ str(r2, MemOperand(r1, kPointerSize, PostIndex)); |
| 3825 | __ cmp(r3, Operand(r0)); |
| 3826 | __ b(ne, &move); |
| 3827 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3828 | // Put success value in top of stack |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3829 | __ mov(r0, Operand(Factory::true_value())); |
| 3830 | __ bind(&end_of_expand_frame); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3831 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3832 | } |
| 3833 | |
| 3834 | |
| 3835 | void ArmCodeGenerator::GenerateIsSmi(ZoneList<Expression*>* args) { |
| 3836 | ASSERT(args->length() == 1); |
| 3837 | Load(args->at(0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3838 | __ pop(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3839 | __ tst(r0, Operand(kSmiTagMask)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3840 | cc_reg_ = eq; |
| 3841 | } |
| 3842 | |
| 3843 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3844 | // This should generate code that performs a charCodeAt() call or returns |
| 3845 | // undefined in order to trigger the slow case, Runtime_StringCharCodeAt. |
| 3846 | // It is not yet implemented on ARM, so it always goes to the slow case. |
| 3847 | void ArmCodeGenerator::GenerateFastCharCodeAt(ZoneList<Expression*>* args) { |
| 3848 | ASSERT(args->length() == 2); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3849 | __ mov(r0, Operand(Factory::undefined_value())); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3850 | __ push(r0); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3851 | } |
| 3852 | |
| 3853 | |
| 3854 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3855 | // This is used in the implementation of apply on ia32 but it is not |
| 3856 | // used on ARM yet. |
| 3857 | void ArmCodeGenerator::GenerateIsArray(ZoneList<Expression*>* args) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3858 | __ stop("ArmCodeGenerator::GenerateIsArray"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3859 | cc_reg_ = eq; |
| 3860 | } |
| 3861 | |
| 3862 | |
| 3863 | void ArmCodeGenerator::GenerateArgumentsLength(ZoneList<Expression*>* args) { |
| 3864 | ASSERT(args->length() == 0); |
| 3865 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3866 | // Seed the result with the formal parameters count, which will be used |
| 3867 | // in case no arguments adaptor frame is found below the current frame. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3868 | __ mov(r0, Operand(Smi::FromInt(scope_->num_parameters()))); |
| 3869 | |
| 3870 | // Call the shared stub to get to the arguments.length. |
| 3871 | ArgumentsAccessStub stub(true); |
| 3872 | __ CallStub(&stub); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3873 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3874 | } |
| 3875 | |
| 3876 | |
| 3877 | void ArmCodeGenerator::GenerateArgumentsAccess(ZoneList<Expression*>* args) { |
| 3878 | ASSERT(args->length() == 1); |
| 3879 | |
| 3880 | // Load the key onto the stack and set register r1 to the formal |
| 3881 | // parameters count for the currently executing function. |
| 3882 | Load(args->at(0)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3883 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3884 | __ mov(r1, Operand(Smi::FromInt(scope_->num_parameters()))); |
| 3885 | |
| 3886 | // Call the shared stub to get to arguments[key]. |
| 3887 | ArgumentsAccessStub stub(false); |
| 3888 | __ CallStub(&stub); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3889 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3890 | } |
| 3891 | |
| 3892 | |
| 3893 | void ArmCodeGenerator::GenerateShiftDownAndTailCall( |
| 3894 | ZoneList<Expression*>* args) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3895 | // r0 = number of arguments |
| 3896 | ASSERT(args->length() == 1); |
| 3897 | Load(args->at(0)); |
| 3898 | __ pop(r0); |
| 3899 | __ mov(r0, Operand(r0, LSR, kSmiTagSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3900 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3901 | // Get the 'this' function and exit the frame without returning. |
| 3902 | __ ldr(r1, MemOperand(pp, JavaScriptFrameConstants::kFunctionOffset)); |
| 3903 | ExitJSFrame(DO_NOT_RETURN); |
| 3904 | // return address in lr |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3905 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3906 | // Move arguments one element down the stack. |
| 3907 | Label move; |
| 3908 | Label moved; |
| 3909 | __ sub(r2, r0, Operand(0), SetCC); |
| 3910 | __ b(eq, &moved); |
| 3911 | __ bind(&move); |
| 3912 | __ sub(ip, r2, Operand(1)); |
| 3913 | __ ldr(r3, MemOperand(sp, ip, LSL, kPointerSizeLog2)); |
| 3914 | __ str(r3, MemOperand(sp, r2, LSL, kPointerSizeLog2)); |
| 3915 | __ sub(r2, r2, Operand(1), SetCC); |
| 3916 | __ b(ne, &move); |
| 3917 | __ bind(&moved); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3918 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3919 | // Remove the TOS (copy of last argument) |
| 3920 | __ pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3921 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3922 | // Jump (tail-call) to the function in register r1. |
| 3923 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 3924 | __ ldr(r1, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 3925 | __ ldr(r1, FieldMemOperand(r1, SharedFunctionInfo::kCodeOffset)); |
| 3926 | __ add(pc, r1, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 3927 | |
| 3928 | return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3929 | } |
| 3930 | |
| 3931 | |
| 3932 | void ArmCodeGenerator::VisitCallRuntime(CallRuntime* node) { |
| 3933 | if (CheckForInlineRuntimeCall(node)) |
| 3934 | return; |
| 3935 | |
| 3936 | ZoneList<Expression*>* args = node->arguments(); |
| 3937 | Comment cmnt(masm_, "[ CallRuntime"); |
| 3938 | Runtime::Function* function = node->function(); |
| 3939 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3940 | if (function != NULL) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3941 | // Push the arguments ("left-to-right"). |
| 3942 | for (int i = 0; i < args->length(); i++) Load(args->at(i)); |
| 3943 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3944 | // Call the C runtime function. |
| 3945 | __ CallRuntime(function, args->length()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3946 | __ push(r0); |
| 3947 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3948 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3949 | // Prepare stack for calling JS runtime function. |
| 3950 | __ mov(r0, Operand(node->name())); |
| 3951 | __ push(r0); |
| 3952 | // Push the builtins object found in the current global object. |
| 3953 | __ ldr(r1, GlobalObject()); |
| 3954 | __ ldr(r0, FieldMemOperand(r1, GlobalObject::kBuiltinsOffset)); |
| 3955 | __ push(r0); |
| 3956 | |
| 3957 | for (int i = 0; i < args->length(); i++) Load(args->at(i)); |
| 3958 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3959 | // Call the JS runtime function. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3960 | Handle<Code> stub = ComputeCallInitialize(args->length()); |
| 3961 | __ Call(stub, code_target); |
| 3962 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3963 | __ pop(); |
| 3964 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3965 | } |
| 3966 | } |
| 3967 | |
| 3968 | |
| 3969 | void ArmCodeGenerator::VisitUnaryOperation(UnaryOperation* node) { |
| 3970 | Comment cmnt(masm_, "[ UnaryOperation"); |
| 3971 | |
| 3972 | Token::Value op = node->op(); |
| 3973 | |
| 3974 | if (op == Token::NOT) { |
| 3975 | LoadCondition(node->expression(), |
| 3976 | CodeGenState::LOAD, |
| 3977 | false_target(), |
| 3978 | true_target(), |
| 3979 | true); |
| 3980 | cc_reg_ = NegateCondition(cc_reg_); |
| 3981 | |
| 3982 | } else if (op == Token::DELETE) { |
| 3983 | Property* property = node->expression()->AsProperty(); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3984 | Variable* variable = node->expression()->AsVariableProxy()->AsVariable(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3985 | if (property != NULL) { |
| 3986 | Load(property->obj()); |
| 3987 | Load(property->key()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3988 | __ mov(r0, Operand(1)); // not counting receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3989 | __ InvokeBuiltin("DELETE", 1, CALL_JS); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3990 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3991 | } else if (variable != NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3992 | Slot* slot = variable->slot(); |
| 3993 | if (variable->is_global()) { |
| 3994 | LoadGlobal(); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 3995 | __ mov(r0, Operand(variable->name())); |
| 3996 | __ push(r0); |
| 3997 | __ mov(r0, Operand(1)); // not counting receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3998 | __ InvokeBuiltin("DELETE", 1, CALL_JS); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3999 | |
| 4000 | } else if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| 4001 | // lookup the context holding the named variable |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4002 | __ push(cp); |
| 4003 | __ mov(r0, Operand(variable->name())); |
| 4004 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4005 | __ CallRuntime(Runtime::kLookupContext, 2); |
| 4006 | // r0: context |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4007 | __ push(r0); |
| 4008 | __ mov(r0, Operand(variable->name())); |
| 4009 | __ push(r0); |
| 4010 | __ mov(r0, Operand(1)); // not counting receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4011 | __ InvokeBuiltin("DELETE", 1, CALL_JS); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4012 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4013 | } else { |
| 4014 | // Default: Result of deleting non-global, not dynamically |
| 4015 | // introduced variables is false. |
| 4016 | __ mov(r0, Operand(Factory::false_value())); |
| 4017 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4018 | |
| 4019 | } else { |
| 4020 | // Default: Result of deleting expressions is true. |
| 4021 | Load(node->expression()); // may have side-effects |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4022 | __ pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4023 | __ mov(r0, Operand(Factory::true_value())); |
| 4024 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4025 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4026 | |
| 4027 | } else if (op == Token::TYPEOF) { |
| 4028 | // Special case for loading the typeof expression; see comment on |
| 4029 | // LoadTypeofExpression(). |
| 4030 | LoadTypeofExpression(node->expression()); |
| 4031 | __ CallRuntime(Runtime::kTypeof, 1); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4032 | __ push(r0); // r0 has result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4033 | |
| 4034 | } else { |
| 4035 | Load(node->expression()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4036 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4037 | switch (op) { |
| 4038 | case Token::NOT: |
| 4039 | case Token::DELETE: |
| 4040 | case Token::TYPEOF: |
| 4041 | UNREACHABLE(); // handled above |
| 4042 | break; |
| 4043 | |
| 4044 | case Token::SUB: { |
| 4045 | UnarySubStub stub; |
| 4046 | __ CallStub(&stub); |
| 4047 | break; |
| 4048 | } |
| 4049 | |
| 4050 | case Token::BIT_NOT: { |
| 4051 | // smi check |
| 4052 | Label smi_label; |
| 4053 | Label continue_label; |
| 4054 | __ tst(r0, Operand(kSmiTagMask)); |
| 4055 | __ b(eq, &smi_label); |
| 4056 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4057 | __ push(r0); |
| 4058 | __ mov(r0, Operand(0)); // not counting receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4059 | __ InvokeBuiltin("BIT_NOT", 0, CALL_JS); |
| 4060 | |
| 4061 | __ b(&continue_label); |
| 4062 | __ bind(&smi_label); |
| 4063 | __ mvn(r0, Operand(r0)); |
| 4064 | __ bic(r0, r0, Operand(kSmiTagMask)); // bit-clear inverted smi-tag |
| 4065 | __ bind(&continue_label); |
| 4066 | break; |
| 4067 | } |
| 4068 | |
| 4069 | case Token::VOID: |
| 4070 | // since the stack top is cached in r0, popping and then |
| 4071 | // pushing a value can be done by just writing to r0. |
| 4072 | __ mov(r0, Operand(Factory::undefined_value())); |
| 4073 | break; |
| 4074 | |
| 4075 | case Token::ADD: |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4076 | __ push(r0); |
| 4077 | __ mov(r0, Operand(0)); // not counting receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4078 | __ InvokeBuiltin("TO_NUMBER", 0, CALL_JS); |
| 4079 | break; |
| 4080 | |
| 4081 | default: |
| 4082 | UNREACHABLE(); |
| 4083 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4084 | __ push(r0); // r0 has result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4085 | } |
| 4086 | } |
| 4087 | |
| 4088 | |
| 4089 | void ArmCodeGenerator::VisitCountOperation(CountOperation* node) { |
| 4090 | Comment cmnt(masm_, "[ CountOperation"); |
| 4091 | |
| 4092 | bool is_postfix = node->is_postfix(); |
| 4093 | bool is_increment = node->op() == Token::INC; |
| 4094 | |
| 4095 | Variable* var = node->expression()->AsVariableProxy()->AsVariable(); |
| 4096 | bool is_const = (var != NULL && var->mode() == Variable::CONST); |
| 4097 | |
| 4098 | // Postfix: Make room for the result. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4099 | if (is_postfix) { |
| 4100 | __ mov(r0, Operand(0)); |
| 4101 | __ push(r0); |
| 4102 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4103 | |
| 4104 | { Reference target(this, node->expression()); |
| 4105 | if (target.is_illegal()) return; |
| 4106 | GetValue(&target); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4107 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4108 | |
| 4109 | Label slow, exit; |
| 4110 | |
| 4111 | // Load the value (1) into register r1. |
| 4112 | __ mov(r1, Operand(Smi::FromInt(1))); |
| 4113 | |
| 4114 | // Check for smi operand. |
| 4115 | __ tst(r0, Operand(kSmiTagMask)); |
| 4116 | __ b(ne, &slow); |
| 4117 | |
| 4118 | // Postfix: Store the old value as the result. |
| 4119 | if (is_postfix) __ str(r0, MemOperand(sp, target.size() * kPointerSize)); |
| 4120 | |
| 4121 | // Perform optimistic increment/decrement. |
| 4122 | if (is_increment) { |
| 4123 | __ add(r0, r0, Operand(r1), SetCC); |
| 4124 | } else { |
| 4125 | __ sub(r0, r0, Operand(r1), SetCC); |
| 4126 | } |
| 4127 | |
| 4128 | // If the increment/decrement didn't overflow, we're done. |
| 4129 | __ b(vc, &exit); |
| 4130 | |
| 4131 | // Revert optimistic increment/decrement. |
| 4132 | if (is_increment) { |
| 4133 | __ sub(r0, r0, Operand(r1)); |
| 4134 | } else { |
| 4135 | __ add(r0, r0, Operand(r1)); |
| 4136 | } |
| 4137 | |
| 4138 | // Slow case: Convert to number. |
| 4139 | __ bind(&slow); |
| 4140 | |
| 4141 | // Postfix: Convert the operand to a number and store it as the result. |
| 4142 | if (is_postfix) { |
| 4143 | InvokeBuiltinStub stub(InvokeBuiltinStub::ToNumber, 2); |
| 4144 | __ CallStub(&stub); |
| 4145 | // Store to result (on the stack). |
| 4146 | __ str(r0, MemOperand(sp, target.size() * kPointerSize)); |
| 4147 | } |
| 4148 | |
| 4149 | // Compute the new value by calling the right JavaScript native. |
| 4150 | if (is_increment) { |
| 4151 | InvokeBuiltinStub stub(InvokeBuiltinStub::Inc, 1); |
| 4152 | __ CallStub(&stub); |
| 4153 | } else { |
| 4154 | InvokeBuiltinStub stub(InvokeBuiltinStub::Dec, 1); |
| 4155 | __ CallStub(&stub); |
| 4156 | } |
| 4157 | |
| 4158 | // Store the new value in the target if not const. |
| 4159 | __ bind(&exit); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4160 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4161 | if (!is_const) SetValue(&target); |
| 4162 | } |
| 4163 | |
| 4164 | // Postfix: Discard the new value and use the old. |
| 4165 | if (is_postfix) __ pop(r0); |
| 4166 | } |
| 4167 | |
| 4168 | |
| 4169 | void ArmCodeGenerator::VisitBinaryOperation(BinaryOperation* node) { |
| 4170 | Comment cmnt(masm_, "[ BinaryOperation"); |
| 4171 | Token::Value op = node->op(); |
| 4172 | |
| 4173 | // According to ECMA-262 section 11.11, page 58, the binary logical |
| 4174 | // operators must yield the result of one of the two expressions |
| 4175 | // before any ToBoolean() conversions. This means that the value |
| 4176 | // produced by a && or || operator is not necessarily a boolean. |
| 4177 | |
| 4178 | // NOTE: If the left hand side produces a materialized value (not in |
| 4179 | // the CC register), we force the right hand side to do the |
| 4180 | // same. This is necessary because we may have to branch to the exit |
| 4181 | // after evaluating the left hand side (due to the shortcut |
| 4182 | // semantics), but the compiler must (statically) know if the result |
| 4183 | // of compiling the binary operation is materialized or not. |
| 4184 | |
| 4185 | if (op == Token::AND) { |
| 4186 | Label is_true; |
| 4187 | LoadCondition(node->left(), |
| 4188 | CodeGenState::LOAD, |
| 4189 | &is_true, |
| 4190 | false_target(), |
| 4191 | false); |
| 4192 | if (has_cc()) { |
| 4193 | Branch(false, false_target()); |
| 4194 | |
| 4195 | // Evaluate right side expression. |
| 4196 | __ bind(&is_true); |
| 4197 | LoadCondition(node->right(), |
| 4198 | CodeGenState::LOAD, |
| 4199 | true_target(), |
| 4200 | false_target(), |
| 4201 | false); |
| 4202 | |
| 4203 | } else { |
| 4204 | Label pop_and_continue, exit; |
| 4205 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4206 | __ ldr(r0, MemOperand(sp, 0)); // dup the stack top |
| 4207 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4208 | // Avoid popping the result if it converts to 'false' using the |
| 4209 | // standard ToBoolean() conversion as described in ECMA-262, |
| 4210 | // section 9.2, page 30. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4211 | ToBoolean(&pop_and_continue, &exit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4212 | Branch(false, &exit); |
| 4213 | |
| 4214 | // Pop the result of evaluating the first part. |
| 4215 | __ bind(&pop_and_continue); |
| 4216 | __ pop(r0); |
| 4217 | |
| 4218 | // Evaluate right side expression. |
| 4219 | __ bind(&is_true); |
| 4220 | Load(node->right()); |
| 4221 | |
| 4222 | // Exit (always with a materialized value). |
| 4223 | __ bind(&exit); |
| 4224 | } |
| 4225 | |
| 4226 | } else if (op == Token::OR) { |
| 4227 | Label is_false; |
| 4228 | LoadCondition(node->left(), |
| 4229 | CodeGenState::LOAD, |
| 4230 | true_target(), |
| 4231 | &is_false, |
| 4232 | false); |
| 4233 | if (has_cc()) { |
| 4234 | Branch(true, true_target()); |
| 4235 | |
| 4236 | // Evaluate right side expression. |
| 4237 | __ bind(&is_false); |
| 4238 | LoadCondition(node->right(), |
| 4239 | CodeGenState::LOAD, |
| 4240 | true_target(), |
| 4241 | false_target(), |
| 4242 | false); |
| 4243 | |
| 4244 | } else { |
| 4245 | Label pop_and_continue, exit; |
| 4246 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4247 | __ ldr(r0, MemOperand(sp, 0)); |
| 4248 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4249 | // Avoid popping the result if it converts to 'true' using the |
| 4250 | // standard ToBoolean() conversion as described in ECMA-262, |
| 4251 | // section 9.2, page 30. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4252 | ToBoolean(&exit, &pop_and_continue); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4253 | Branch(true, &exit); |
| 4254 | |
| 4255 | // Pop the result of evaluating the first part. |
| 4256 | __ bind(&pop_and_continue); |
| 4257 | __ pop(r0); |
| 4258 | |
| 4259 | // Evaluate right side expression. |
| 4260 | __ bind(&is_false); |
| 4261 | Load(node->right()); |
| 4262 | |
| 4263 | // Exit (always with a materialized value). |
| 4264 | __ bind(&exit); |
| 4265 | } |
| 4266 | |
| 4267 | } else { |
| 4268 | // Optimize for the case where (at least) one of the expressions |
| 4269 | // is a literal small integer. |
| 4270 | Literal* lliteral = node->left()->AsLiteral(); |
| 4271 | Literal* rliteral = node->right()->AsLiteral(); |
| 4272 | |
| 4273 | if (rliteral != NULL && rliteral->handle()->IsSmi()) { |
| 4274 | Load(node->left()); |
| 4275 | SmiOperation(node->op(), rliteral->handle(), false); |
| 4276 | |
| 4277 | } else if (lliteral != NULL && lliteral->handle()->IsSmi()) { |
| 4278 | Load(node->right()); |
| 4279 | SmiOperation(node->op(), lliteral->handle(), true); |
| 4280 | |
| 4281 | } else { |
| 4282 | Load(node->left()); |
| 4283 | Load(node->right()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4284 | GenericBinaryOperation(node->op()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4285 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4286 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4287 | } |
| 4288 | } |
| 4289 | |
| 4290 | |
| 4291 | void ArmCodeGenerator::VisitThisFunction(ThisFunction* node) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4292 | __ ldr(r0, FunctionOperand()); |
| 4293 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4294 | } |
| 4295 | |
| 4296 | |
| 4297 | void ArmCodeGenerator::VisitCompareOperation(CompareOperation* node) { |
| 4298 | Comment cmnt(masm_, "[ CompareOperation"); |
| 4299 | |
| 4300 | // Get the expressions from the node. |
| 4301 | Expression* left = node->left(); |
| 4302 | Expression* right = node->right(); |
| 4303 | Token::Value op = node->op(); |
| 4304 | |
| 4305 | // NOTE: To make null checks efficient, we check if either left or |
| 4306 | // right is the literal 'null'. If so, we optimize the code by |
| 4307 | // inlining a null check instead of calling the (very) general |
| 4308 | // runtime routine for checking equality. |
| 4309 | |
| 4310 | bool left_is_null = |
| 4311 | left->AsLiteral() != NULL && left->AsLiteral()->IsNull(); |
| 4312 | bool right_is_null = |
| 4313 | right->AsLiteral() != NULL && right->AsLiteral()->IsNull(); |
| 4314 | |
| 4315 | if (op == Token::EQ || op == Token::EQ_STRICT) { |
| 4316 | // The 'null' value is only equal to 'null' or 'undefined'. |
| 4317 | if (left_is_null || right_is_null) { |
| 4318 | Load(left_is_null ? right : left); |
| 4319 | Label exit, undetectable; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4320 | __ pop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4321 | __ cmp(r0, Operand(Factory::null_value())); |
| 4322 | |
| 4323 | // The 'null' value is only equal to 'undefined' if using |
| 4324 | // non-strict comparisons. |
| 4325 | if (op != Token::EQ_STRICT) { |
| 4326 | __ b(eq, &exit); |
| 4327 | __ cmp(r0, Operand(Factory::undefined_value())); |
| 4328 | |
| 4329 | // NOTE: it can be undetectable object. |
| 4330 | __ b(eq, &exit); |
| 4331 | __ tst(r0, Operand(kSmiTagMask)); |
| 4332 | |
| 4333 | __ b(ne, &undetectable); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4334 | __ b(false_target()); |
| 4335 | |
| 4336 | __ bind(&undetectable); |
| 4337 | __ ldr(r1, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 4338 | __ ldrb(r2, FieldMemOperand(r1, Map::kBitFieldOffset)); |
| 4339 | __ and_(r2, r2, Operand(1 << Map::kIsUndetectable)); |
| 4340 | __ cmp(r2, Operand(1 << Map::kIsUndetectable)); |
| 4341 | } |
| 4342 | |
| 4343 | __ bind(&exit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4344 | |
| 4345 | cc_reg_ = eq; |
| 4346 | return; |
| 4347 | } |
| 4348 | } |
| 4349 | |
| 4350 | |
| 4351 | // NOTE: To make typeof testing for natives implemented in |
| 4352 | // JavaScript really efficient, we generate special code for |
| 4353 | // expressions of the form: 'typeof <expression> == <string>'. |
| 4354 | |
| 4355 | UnaryOperation* operation = left->AsUnaryOperation(); |
| 4356 | if ((op == Token::EQ || op == Token::EQ_STRICT) && |
| 4357 | (operation != NULL && operation->op() == Token::TYPEOF) && |
| 4358 | (right->AsLiteral() != NULL && |
| 4359 | right->AsLiteral()->handle()->IsString())) { |
| 4360 | Handle<String> check(String::cast(*right->AsLiteral()->handle())); |
| 4361 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4362 | // Load the operand, move it to register r1. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4363 | LoadTypeofExpression(operation->expression()); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4364 | __ pop(r1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4365 | |
| 4366 | if (check->Equals(Heap::number_symbol())) { |
| 4367 | __ tst(r1, Operand(kSmiTagMask)); |
| 4368 | __ b(eq, true_target()); |
| 4369 | __ ldr(r1, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4370 | __ cmp(r1, Operand(Factory::heap_number_map())); |
| 4371 | cc_reg_ = eq; |
| 4372 | |
| 4373 | } else if (check->Equals(Heap::string_symbol())) { |
| 4374 | __ tst(r1, Operand(kSmiTagMask)); |
| 4375 | __ b(eq, false_target()); |
| 4376 | |
| 4377 | __ ldr(r1, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4378 | |
| 4379 | // NOTE: it might be an undetectable string object |
| 4380 | __ ldrb(r2, FieldMemOperand(r1, Map::kBitFieldOffset)); |
| 4381 | __ and_(r2, r2, Operand(1 << Map::kIsUndetectable)); |
| 4382 | __ cmp(r2, Operand(1 << Map::kIsUndetectable)); |
| 4383 | __ b(eq, false_target()); |
| 4384 | |
| 4385 | __ ldrb(r2, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 4386 | __ cmp(r2, Operand(FIRST_NONSTRING_TYPE)); |
| 4387 | cc_reg_ = lt; |
| 4388 | |
| 4389 | } else if (check->Equals(Heap::boolean_symbol())) { |
| 4390 | __ cmp(r1, Operand(Factory::true_value())); |
| 4391 | __ b(eq, true_target()); |
| 4392 | __ cmp(r1, Operand(Factory::false_value())); |
| 4393 | cc_reg_ = eq; |
| 4394 | |
| 4395 | } else if (check->Equals(Heap::undefined_symbol())) { |
| 4396 | __ cmp(r1, Operand(Factory::undefined_value())); |
| 4397 | __ b(eq, true_target()); |
| 4398 | |
| 4399 | __ tst(r1, Operand(kSmiTagMask)); |
| 4400 | __ b(eq, false_target()); |
| 4401 | |
| 4402 | // NOTE: it can be undetectable object. |
| 4403 | __ ldr(r1, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4404 | __ ldrb(r2, FieldMemOperand(r1, Map::kBitFieldOffset)); |
| 4405 | __ and_(r2, r2, Operand(1 << Map::kIsUndetectable)); |
| 4406 | __ cmp(r2, Operand(1 << Map::kIsUndetectable)); |
| 4407 | |
| 4408 | cc_reg_ = eq; |
| 4409 | |
| 4410 | } else if (check->Equals(Heap::function_symbol())) { |
| 4411 | __ tst(r1, Operand(kSmiTagMask)); |
| 4412 | __ b(eq, false_target()); |
| 4413 | __ ldr(r1, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4414 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 4415 | __ cmp(r1, Operand(JS_FUNCTION_TYPE)); |
| 4416 | cc_reg_ = eq; |
| 4417 | |
| 4418 | } else if (check->Equals(Heap::object_symbol())) { |
| 4419 | __ tst(r1, Operand(kSmiTagMask)); |
| 4420 | __ b(eq, false_target()); |
| 4421 | |
| 4422 | __ ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4423 | __ cmp(r1, Operand(Factory::null_value())); |
| 4424 | __ b(eq, true_target()); |
| 4425 | |
| 4426 | // NOTE: it might be an undetectable object. |
| 4427 | __ ldrb(r1, FieldMemOperand(r2, Map::kBitFieldOffset)); |
| 4428 | __ and_(r1, r1, Operand(1 << Map::kIsUndetectable)); |
| 4429 | __ cmp(r1, Operand(1 << Map::kIsUndetectable)); |
| 4430 | __ b(eq, false_target()); |
| 4431 | |
| 4432 | __ ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
| 4433 | __ cmp(r2, Operand(FIRST_JS_OBJECT_TYPE)); |
| 4434 | __ b(lt, false_target()); |
| 4435 | __ cmp(r2, Operand(LAST_JS_OBJECT_TYPE)); |
| 4436 | cc_reg_ = le; |
| 4437 | |
| 4438 | } else { |
| 4439 | // Uncommon case: Typeof testing against a string literal that |
| 4440 | // is never returned from the typeof operator. |
| 4441 | __ b(false_target()); |
| 4442 | } |
| 4443 | return; |
| 4444 | } |
| 4445 | |
| 4446 | Load(left); |
| 4447 | Load(right); |
| 4448 | switch (op) { |
| 4449 | case Token::EQ: |
| 4450 | Comparison(eq, false); |
| 4451 | break; |
| 4452 | |
| 4453 | case Token::LT: |
| 4454 | Comparison(lt); |
| 4455 | break; |
| 4456 | |
| 4457 | case Token::GT: |
| 4458 | Comparison(gt); |
| 4459 | break; |
| 4460 | |
| 4461 | case Token::LTE: |
| 4462 | Comparison(le); |
| 4463 | break; |
| 4464 | |
| 4465 | case Token::GTE: |
| 4466 | Comparison(ge); |
| 4467 | break; |
| 4468 | |
| 4469 | case Token::EQ_STRICT: |
| 4470 | Comparison(eq, true); |
| 4471 | break; |
| 4472 | |
| 4473 | case Token::IN: |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4474 | __ mov(r0, Operand(1)); // not counting receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4475 | __ InvokeBuiltin("IN", 1, CALL_JS); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4476 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4477 | break; |
| 4478 | |
| 4479 | case Token::INSTANCEOF: |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4480 | __ mov(r0, Operand(1)); // not counting receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4481 | __ InvokeBuiltin("INSTANCE_OF", 1, CALL_JS); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame^] | 4482 | __ push(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4483 | break; |
| 4484 | |
| 4485 | default: |
| 4486 | UNREACHABLE(); |
| 4487 | } |
| 4488 | } |
| 4489 | |
| 4490 | |
| 4491 | void ArmCodeGenerator::RecordStatementPosition(Node* node) { |
| 4492 | if (FLAG_debug_info) { |
| 4493 | int statement_pos = node->statement_pos(); |
| 4494 | if (statement_pos == kNoPosition) return; |
| 4495 | __ RecordStatementPosition(statement_pos); |
| 4496 | } |
| 4497 | } |
| 4498 | |
| 4499 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4500 | void ArmCodeGenerator::EnterJSFrame(int argc) { |
| 4501 | __ EnterJSFrame(argc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4502 | } |
| 4503 | |
| 4504 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4505 | void ArmCodeGenerator::ExitJSFrame(ExitJSFlag flag) { |
| 4506 | JSExitStub stub(flag); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4507 | __ CallJSExitStub(&stub); |
| 4508 | } |
| 4509 | |
| 4510 | |
| 4511 | #undef __ |
| 4512 | |
| 4513 | |
| 4514 | // ----------------------------------------------------------------------------- |
| 4515 | // CodeGenerator interface |
| 4516 | |
| 4517 | // MakeCode() is just a wrapper for CodeGenerator::MakeCode() |
| 4518 | // so we don't have to expose the entire CodeGenerator class in |
| 4519 | // the .h file. |
| 4520 | Handle<Code> CodeGenerator::MakeCode(FunctionLiteral* fun, |
| 4521 | Handle<Script> script, |
| 4522 | bool is_eval) { |
| 4523 | Handle<Code> code = ArmCodeGenerator::MakeCode(fun, script, is_eval); |
| 4524 | if (!code.is_null()) { |
| 4525 | Counters::total_compiled_code_size.Increment(code->instruction_size()); |
| 4526 | } |
| 4527 | return code; |
| 4528 | } |
| 4529 | |
| 4530 | |
| 4531 | } } // namespace v8::internal |