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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.

Namespace:  System.Reflection.Emit
Assemblies:   System.Reflection.Primitives (in System.Reflection.Primitives.dll)
  mscorlib (in mscorlib.dll)

public static readonly OpCode Add_Ovf_Un

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

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)

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
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