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OpCodes.Add_Ovf_Un Field

Adds two unsigned integer values, performs an overflow check, and pushes the result onto the evaluation stack.

[Visual Basic]
Public Shared ReadOnly Add_Ovf_Un As OpCode
public static readonly OpCode Add_Ovf_Un;
public: static OpCode Add_Ovf_Un;
public static var Add_Ovf_Un : OpCode;


The following table lists the instruction's hexadecimal and Microsoft Intermediate Language (MSIL) assembly format, along with a brief reference summary:

Format Assembly Format Description
D7 add.ovf.un Adds two unsigned integer values with an overflow check.

The stack transitional behavior, in sequential order, is:

  1. value1 is pushed onto the stack.
  2. value2 is pushed onto the stack.
  3. value2 and value1 are popped from the stack; value1 is added to value2 with a check for overflow.
  4. The result is pushed onto the stack.

OverflowException is thrown if the result is not represented in the result type.

You can perform this operation on signed integers. For floating-point values, use Add.

The acceptable operand types and their corresponding result data type are listed in the table below. If there is no entry for a particular type combination (for example, int32 and float; int32 and int64), it is an invalid Microsoft Intermediate Language (MSIL) instruction and generates an error.

operand value1 type value2 type result type
add int32 int32 int32
add int32 natural int natural int
add int32 & &
add int32 * *
add int64 int64 int64
add natural int int32 natural int
add natural int natural int natural int
add natural int & &
add natural int * *
add F F F
add & int32 &
add & natural int &
add * int32 *
add * natural int *

The following Emit constructor overload can use the add.ovf.un opcode:

  • ILGenerator.Emit(OpCode)


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

OpCodes Class | OpCodes Members | System.Reflection.Emit Namespace