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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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354 ASSERT(!scratch.is(at)); | 354 ASSERT(!scratch.is(at)); |
355 | 355 |
356 // Load current lexical context from the stack frame. | 356 // Load current lexical context from the stack frame. |
357 lw(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); | 357 lw(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
358 // In debug mode, make sure the lexical context is set. | 358 // In debug mode, make sure the lexical context is set. |
359 #ifdef DEBUG | 359 #ifdef DEBUG |
360 Check(ne, "we should not have an empty lexical context", | 360 Check(ne, "we should not have an empty lexical context", |
361 scratch, Operand(zero_reg)); | 361 scratch, Operand(zero_reg)); |
362 #endif | 362 #endif |
363 | 363 |
364 // Load the global context of the current context. | 364 // Load the native context of the current context. |
365 int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; | 365 int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
366 lw(scratch, FieldMemOperand(scratch, offset)); | 366 lw(scratch, FieldMemOperand(scratch, offset)); |
367 lw(scratch, FieldMemOperand(scratch, GlobalObject::kGlobalContextOffset)); | 367 lw(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
368 | 368 |
369 // Check the context is a global context. | 369 // Check the context is a native context. |
370 if (emit_debug_code()) { | 370 if (emit_debug_code()) { |
371 // TODO(119): Avoid push(holder_reg)/pop(holder_reg). | 371 // TODO(119): Avoid push(holder_reg)/pop(holder_reg). |
372 push(holder_reg); // Temporarily save holder on the stack. | 372 push(holder_reg); // Temporarily save holder on the stack. |
373 // Read the first word and compare to the global_context_map. | 373 // Read the first word and compare to the native_context_map. |
374 lw(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); | 374 lw(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
375 LoadRoot(at, Heap::kGlobalContextMapRootIndex); | 375 LoadRoot(at, Heap::kNativeContextMapRootIndex); |
376 Check(eq, "JSGlobalObject::global_context should be a global context.", | 376 Check(eq, "JSGlobalObject::native_context should be a native context.", |
377 holder_reg, Operand(at)); | 377 holder_reg, Operand(at)); |
378 pop(holder_reg); // Restore holder. | 378 pop(holder_reg); // Restore holder. |
379 } | 379 } |
380 | 380 |
381 // Check if both contexts are the same. | 381 // Check if both contexts are the same. |
382 lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); | 382 lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
383 Branch(&same_contexts, eq, scratch, Operand(at)); | 383 Branch(&same_contexts, eq, scratch, Operand(at)); |
384 | 384 |
385 // Check the context is a global context. | 385 // Check the context is a native context. |
386 if (emit_debug_code()) { | 386 if (emit_debug_code()) { |
387 // TODO(119): Avoid push(holder_reg)/pop(holder_reg). | 387 // TODO(119): Avoid push(holder_reg)/pop(holder_reg). |
388 push(holder_reg); // Temporarily save holder on the stack. | 388 push(holder_reg); // Temporarily save holder on the stack. |
389 mov(holder_reg, at); // Move at to its holding place. | 389 mov(holder_reg, at); // Move at to its holding place. |
390 LoadRoot(at, Heap::kNullValueRootIndex); | 390 LoadRoot(at, Heap::kNullValueRootIndex); |
391 Check(ne, "JSGlobalProxy::context() should not be null.", | 391 Check(ne, "JSGlobalProxy::context() should not be null.", |
392 holder_reg, Operand(at)); | 392 holder_reg, Operand(at)); |
393 | 393 |
394 lw(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); | 394 lw(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); |
395 LoadRoot(at, Heap::kGlobalContextMapRootIndex); | 395 LoadRoot(at, Heap::kNativeContextMapRootIndex); |
396 Check(eq, "JSGlobalObject::global_context should be a global context.", | 396 Check(eq, "JSGlobalObject::native_context should be a native context.", |
397 holder_reg, Operand(at)); | 397 holder_reg, Operand(at)); |
398 // Restore at is not needed. at is reloaded below. | 398 // Restore at is not needed. at is reloaded below. |
399 pop(holder_reg); // Restore holder. | 399 pop(holder_reg); // Restore holder. |
400 // Restore at to holder's context. | 400 // Restore at to holder's context. |
401 lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); | 401 lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
402 } | 402 } |
403 | 403 |
404 // Check that the security token in the calling global object is | 404 // Check that the security token in the calling global object is |
405 // compatible with the security token in the receiving global | 405 // compatible with the security token in the receiving global |
406 // object. | 406 // object. |
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4445 | 4445 |
4446 | 4446 |
4447 void MacroAssembler::LoadTransitionedArrayMapConditional( | 4447 void MacroAssembler::LoadTransitionedArrayMapConditional( |
4448 ElementsKind expected_kind, | 4448 ElementsKind expected_kind, |
4449 ElementsKind transitioned_kind, | 4449 ElementsKind transitioned_kind, |
4450 Register map_in_out, | 4450 Register map_in_out, |
4451 Register scratch, | 4451 Register scratch, |
4452 Label* no_map_match) { | 4452 Label* no_map_match) { |
4453 // Load the global or builtins object from the current context. | 4453 // Load the global or builtins object from the current context. |
4454 lw(scratch, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); | 4454 lw(scratch, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
4455 lw(scratch, FieldMemOperand(scratch, GlobalObject::kGlobalContextOffset)); | 4455 lw(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
4456 | 4456 |
4457 // Check that the function's map is the same as the expected cached map. | 4457 // Check that the function's map is the same as the expected cached map. |
4458 lw(scratch, | 4458 lw(scratch, |
4459 MemOperand(scratch, | 4459 MemOperand(scratch, |
4460 Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX))); | 4460 Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX))); |
4461 size_t offset = expected_kind * kPointerSize + | 4461 size_t offset = expected_kind * kPointerSize + |
4462 FixedArrayBase::kHeaderSize; | 4462 FixedArrayBase::kHeaderSize; |
4463 lw(at, FieldMemOperand(scratch, offset)); | 4463 lw(at, FieldMemOperand(scratch, offset)); |
4464 Branch(no_map_match, ne, map_in_out, Operand(at)); | 4464 Branch(no_map_match, ne, map_in_out, Operand(at)); |
4465 | 4465 |
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4491 scratch, | 4491 scratch, |
4492 &done); | 4492 &done); |
4493 } | 4493 } |
4494 bind(&done); | 4494 bind(&done); |
4495 } | 4495 } |
4496 | 4496 |
4497 | 4497 |
4498 void MacroAssembler::LoadGlobalFunction(int index, Register function) { | 4498 void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
4499 // Load the global or builtins object from the current context. | 4499 // Load the global or builtins object from the current context. |
4500 lw(function, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); | 4500 lw(function, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
4501 // Load the global context from the global or builtins object. | 4501 // Load the native context from the global or builtins object. |
4502 lw(function, FieldMemOperand(function, | 4502 lw(function, FieldMemOperand(function, |
4503 GlobalObject::kGlobalContextOffset)); | 4503 GlobalObject::kNativeContextOffset)); |
4504 // Load the function from the global context. | 4504 // Load the function from the native context. |
4505 lw(function, MemOperand(function, Context::SlotOffset(index))); | 4505 lw(function, MemOperand(function, Context::SlotOffset(index))); |
4506 } | 4506 } |
4507 | 4507 |
4508 | 4508 |
4509 void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, | 4509 void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
4510 Register map, | 4510 Register map, |
4511 Register scratch) { | 4511 Register scratch) { |
4512 // Load the initial map. The global functions all have initial maps. | 4512 // Load the initial map. The global functions all have initial maps. |
4513 lw(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); | 4513 lw(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
4514 if (emit_debug_code()) { | 4514 if (emit_debug_code()) { |
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5460 opcode == BGTZL); | 5460 opcode == BGTZL); |
5461 opcode = (cond == eq) ? BEQ : BNE; | 5461 opcode = (cond == eq) ? BEQ : BNE; |
5462 instr = (instr & ~kOpcodeMask) | opcode; | 5462 instr = (instr & ~kOpcodeMask) | opcode; |
5463 masm_.emit(instr); | 5463 masm_.emit(instr); |
5464 } | 5464 } |
5465 | 5465 |
5466 | 5466 |
5467 } } // namespace v8::internal | 5467 } } // namespace v8::internal |
5468 | 5468 |
5469 #endif // V8_TARGET_ARCH_MIPS | 5469 #endif // V8_TARGET_ARCH_MIPS |
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