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OpCodes::Sub Field

Subtracts one value from another 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 initonly OpCode Sub

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

59

sub

Subtracts one value from another, 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; value2 is subtracted from value1.

  4. The result is pushed onto the stack.

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

Integer subtraction wraps, rather than saturates. For example: assuming 8-bit integers, where value1 is set to 0 and value2 is set to 1, the "wrapped" result will be 255.

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

The following Emit method overload can use the sub 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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