OpCodes.Add_Ovf_Un Field
Adds two unsigned integer values, performs an overflow check, and pushes the result onto the evaluation stack.
Assembly: mscorlib (in mscorlib.dll)
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:
value1 is pushed onto the stack.
value2 is pushed onto the stack.
value2 and value1 are popped from the stack; value1 is added to value2 with a check for overflow.
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 | native int | native int |
add | int32 | & | & |
add | int32 | * | * |
add | int64 | int64 | int64 |
add | native int | int32 | native int |
add | native int | native int | native int |
add | native int | & | & |
add | native int | * | * |
add | F | F | F |
add | & | int32 | & |
add | & | native int | & |
add | * | int32 | * |
add | * | native int | * |
The following Emit method overload can use the add.ovf.un opcode:
ILGenerator.Emit(OpCode)
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
