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OpCodes.Add Field

Adds two values and pushes the result onto the evaluation stack.

Namespace:  System.Reflection.Emit
Assembly:  mscorlib (in mscorlib.dll)

public static readonly OpCode Add

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

58

add

Adds two numeric values, returning a new numeric value.

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.

  4. The result is pushed onto the stack.

Overflow is not detected for integer operations (for proper overflow handling, see Add_Ovf).

Integer addition wraps, rather than saturates. For example, assuming 8-bit integers where value1 is set to 255 and value2 is set to 1, the wrapped result is 0 rather than 256.

Floating-point overflow returns +inf (PositiveInfinity) or -inf (NegativeInfinity).

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) 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 opcode:

  • ILGenerator.Emit(OpCode)

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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