C++ (Cpp) MUnbox示例

示例#1

文件： CodeGenerator-mips64.cpp 项目： AlexOreshkevich/mongo

void
CodeGeneratorMIPS64::visitUnbox(LUnbox* unbox)
{
    MUnbox* mir = unbox->mir();

    if (mir->fallible()) {
        const ValueOperand value = ToValue(unbox, LUnbox::Input);
        masm.splitTag(value, SecondScratchReg);
        bailoutCmp32(Assembler::NotEqual, SecondScratchReg, Imm32(MIRTypeToTag(mir->type())),
                     unbox->snapshot());
    }

    Operand input = ToOperand(unbox->getOperand(LUnbox::Input));
    Register result = ToRegister(unbox->output());
    switch (mir->type()) {
      case MIRType_Int32:
        masm.unboxInt32(input, result);
        break;
      case MIRType_Boolean:
        masm.unboxBoolean(input, result);
        break;
      case MIRType_Object:
        masm.unboxObject(input, result);
        break;
      case MIRType_String:
        masm.unboxString(input, result);
        break;
      case MIRType_Symbol:
        masm.unboxSymbol(input, result);
        break;
      default:
        MOZ_CRASH("Given MIRType cannot be unboxed.");
    }
}

示例#2

文件： CodeGenerator-x64.cpp 项目： marshall/gecko-dev

bool
CodeGeneratorX64::visitUnbox(LUnbox *unbox)
{
    const ValueOperand value = ToValue(unbox, LUnbox::Input);
    const LDefinition *result = unbox->output();
    MUnbox *mir = unbox->mir();

    if (mir->fallible()) {
        Assembler::Condition cond;
        switch (mir->type()) {
          case MIRType_Int32:
            cond = masm.testInt32(Assembler::NotEqual, value);
            break;
          case MIRType_Boolean:
            cond = masm.testBoolean(Assembler::NotEqual, value);
            break;
          case MIRType_Object:
            cond = masm.testObject(Assembler::NotEqual, value);
            break;
          case MIRType_String:
            cond = masm.testString(Assembler::NotEqual, value);
            break;
          case MIRType_Symbol:
            cond = masm.testSymbol(Assembler::NotEqual, value);
            break;
          default:
            MOZ_CRASH("Given MIRType cannot be unboxed.");
        }
        if (!bailoutIf(cond, unbox->snapshot()))
            return false;
    }

    switch (mir->type()) {
      case MIRType_Int32:
        masm.unboxInt32(value, ToRegister(result));
        break;
      case MIRType_Boolean:
        masm.unboxBoolean(value, ToRegister(result));
        break;
      case MIRType_Object:
        masm.unboxObject(value, ToRegister(result));
        break;
      case MIRType_String:
        masm.unboxString(value, ToRegister(result));
        break;
      case MIRType_Symbol:
        masm.unboxSymbol(value, ToRegister(result));
        break;
      default:
        MOZ_CRASH("Given MIRType cannot be unboxed.");
    }

    return true;
}

示例#3

文件： CodeGenerator-x86.cpp 项目： nikhilgupta23/gecko-dev

void
CodeGeneratorX86::visitUnbox(LUnbox* unbox)
{
    // Note that for unbox, the type and payload indexes are switched on the
    // inputs.
    MUnbox* mir = unbox->mir();

    if (mir->fallible()) {
        masm.cmp32(ToOperand(unbox->type()), Imm32(MIRTypeToTag(mir->type())));
        bailoutIf(Assembler::NotEqual, unbox->snapshot());
    }
}

示例#4

文件： CodeGenerator-x64.cpp 项目： alphan102/gecko-dev

void
CodeGeneratorX64::visitUnbox(LUnbox* unbox)
{
    MUnbox* mir = unbox->mir();

    if (mir->fallible()) {
        const ValueOperand value = ToValue(unbox, LUnbox::Input);
        Assembler::Condition cond;
        switch (mir->type()) {
          case MIRType::Int32:
            cond = masm.testInt32(Assembler::NotEqual, value);
            break;
          case MIRType::Boolean:
            cond = masm.testBoolean(Assembler::NotEqual, value);
            break;
          case MIRType::Object:
            cond = masm.testObject(Assembler::NotEqual, value);
            break;
          case MIRType::String:
            cond = masm.testString(Assembler::NotEqual, value);
            break;
          case MIRType::Symbol:
            cond = masm.testSymbol(Assembler::NotEqual, value);
            break;
          default:
            MOZ_CRASH("Given MIRType cannot be unboxed.");
        }
        bailoutIf(cond, unbox->snapshot());
    }

    Operand input = ToOperand(unbox->getOperand(LUnbox::Input));
    Register result = ToRegister(unbox->output());
    switch (mir->type()) {
      case MIRType::Int32:
        masm.unboxInt32(input, result);
        break;
      case MIRType::Boolean:
        masm.unboxBoolean(input, result);
        break;
      case MIRType::Object:
        masm.unboxObject(input, result);
        break;
      case MIRType::String:
        masm.unboxString(input, result);
        break;
      case MIRType::Symbol:
        masm.unboxSymbol(input, result);
        break;
      default:
        MOZ_CRASH("Given MIRType cannot be unboxed.");
    }
}

示例#5

文件： TypePolicy.cpp 项目： msliu/gecko-dev

bool
IntPolicy<Op>::staticAdjustInputs(TempAllocator &alloc, MInstruction *def)
{
    MDefinition *in = def->getOperand(Op);
    if (in->type() == MIRType_Int32)
        return true;

    MUnbox *replace = MUnbox::New(alloc, in, MIRType_Int32, MUnbox::Fallible);
    def->block()->insertBefore(def, replace);
    def->replaceOperand(Op, replace);

    return replace->typePolicy()->adjustInputs(alloc, replace);
}

示例#6

文件： TypePolicy.cpp 项目： msliu/gecko-dev

bool
StringPolicy<Op>::staticAdjustInputs(TempAllocator &alloc, MInstruction *ins)
{
    MDefinition *in = ins->getOperand(Op);
    if (in->type() == MIRType_String)
        return true;

    MUnbox *replace = MUnbox::New(alloc, in, MIRType_String, MUnbox::Fallible);
    ins->block()->insertBefore(ins, replace);
    ins->replaceOperand(Op, replace);

    return replace->typePolicy()->adjustInputs(alloc, replace);
}

示例#7

文件： CodeGenerator-mips32.cpp 项目： AlexOreshkevich/mongo

void
CodeGeneratorMIPS::visitUnbox(LUnbox* unbox)
{
    // Note that for unbox, the type and payload indexes are switched on the
    // inputs.
    MUnbox* mir = unbox->mir();
    Register type = ToRegister(unbox->type());

    if (mir->fallible()) {
        bailoutCmp32(Assembler::NotEqual, type, Imm32(MIRTypeToTag(mir->type())),
                     unbox->snapshot());
    }
}

示例#8

文件： TypePolicy.cpp 项目： servo/mozjs

bool ObjectPolicy<Op>::staticAdjustInputs(TempAllocator& alloc,
                                          MInstruction* ins) {
  MDefinition* in = ins->getOperand(Op);
  if (in->type() == MIRType::Object || in->type() == MIRType::Slots ||
      in->type() == MIRType::Elements) {
    return true;
  }

  MUnbox* replace = MUnbox::New(alloc, in, MIRType::Object, MUnbox::Fallible);
  ins->block()->insertBefore(ins, replace);
  ins->replaceOperand(Op, replace);

  return replace->typePolicy()->adjustInputs(alloc, replace);
}