diff options
Diffstat (limited to 'src/ia32/full-codegen-ia32.cc')
-rw-r--r-- | src/ia32/full-codegen-ia32.cc | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc index 62a2c2af..cf16c5b6 100644 --- a/src/ia32/full-codegen-ia32.cc +++ b/src/ia32/full-codegen-ia32.cc @@ -3305,99 +3305,6 @@ void FullCodeGenerator::EmitRegExpConstructResult(CallRuntime* expr) { } -void FullCodeGenerator::EmitSwapElements(CallRuntime* expr) { - ZoneList<Expression*>* args = expr->arguments(); - ASSERT(args->length() == 3); - VisitForStackValue(args->at(0)); - VisitForStackValue(args->at(1)); - VisitForStackValue(args->at(2)); - Label done; - Label slow_case; - Register object = eax; - Register index_1 = ebx; - Register index_2 = ecx; - Register elements = edi; - Register temp = edx; - __ mov(object, Operand(esp, 2 * kPointerSize)); - // Fetch the map and check if array is in fast case. - // Check that object doesn't require security checks and - // has no indexed interceptor. - __ CmpObjectType(object, JS_ARRAY_TYPE, temp); - __ j(not_equal, &slow_case); - __ test_b(FieldOperand(temp, Map::kBitFieldOffset), - KeyedLoadIC::kSlowCaseBitFieldMask); - __ j(not_zero, &slow_case); - - // Check the object's elements are in fast case and writable. - __ mov(elements, FieldOperand(object, JSObject::kElementsOffset)); - __ cmp(FieldOperand(elements, HeapObject::kMapOffset), - Immediate(isolate()->factory()->fixed_array_map())); - __ j(not_equal, &slow_case); - - // Check that both indices are smis. - __ mov(index_1, Operand(esp, 1 * kPointerSize)); - __ mov(index_2, Operand(esp, 0)); - __ mov(temp, index_1); - __ or_(temp, index_2); - __ JumpIfNotSmi(temp, &slow_case); - - // Check that both indices are valid. - __ mov(temp, FieldOperand(object, JSArray::kLengthOffset)); - __ cmp(temp, index_1); - __ j(below_equal, &slow_case); - __ cmp(temp, index_2); - __ j(below_equal, &slow_case); - - // Bring addresses into index1 and index2. - __ lea(index_1, CodeGenerator::FixedArrayElementOperand(elements, index_1)); - __ lea(index_2, CodeGenerator::FixedArrayElementOperand(elements, index_2)); - - // Swap elements. Use object and temp as scratch registers. - __ mov(object, Operand(index_1, 0)); - __ mov(temp, Operand(index_2, 0)); - __ mov(Operand(index_2, 0), object); - __ mov(Operand(index_1, 0), temp); - - Label no_remembered_set; - __ CheckPageFlag(elements, - temp, - 1 << MemoryChunk::SCAN_ON_SCAVENGE, - not_zero, - &no_remembered_set, - Label::kNear); - // Possible optimization: do a check that both values are Smis - // (or them and test against Smi mask.) - - // We are swapping two objects in an array and the incremental marker never - // pauses in the middle of scanning a single object. Therefore the - // incremental marker is not disturbed, so we don't need to call the - // RecordWrite stub that notifies the incremental marker. - __ RememberedSetHelper(elements, - index_1, - temp, - kDontSaveFPRegs, - MacroAssembler::kFallThroughAtEnd); - __ RememberedSetHelper(elements, - index_2, - temp, - kDontSaveFPRegs, - MacroAssembler::kFallThroughAtEnd); - - __ bind(&no_remembered_set); - - // We are done. Drop elements from the stack, and return undefined. - __ add(esp, Immediate(3 * kPointerSize)); - __ mov(eax, isolate()->factory()->undefined_value()); - __ jmp(&done); - - __ bind(&slow_case); - __ CallRuntime(Runtime::kSwapElements, 3); - - __ bind(&done); - context()->Plug(eax); -} - - void FullCodeGenerator::EmitGetFromCache(CallRuntime* expr) { ZoneList<Expression*>* args = expr->arguments(); ASSERT_EQ(2, args->length()); |