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OpCodes.Blt_Un Field

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Transfers control to a target instruction if the first value is less than the second value, when comparing unsigned integer values or unordered float values.

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

Syntax

'Declaration
Public Shared ReadOnly Blt_Un As OpCode
public static readonly OpCode Blt_Un

Remarks

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

44 < int32 >

blt.un target

Branch to the target instruction at the specified offset if the first value is less than the second value (unsigned values).

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; if value1 is less than value2, the branch operation is performed.

The blt.un instruction transfers control to the specified target instruction if value1 is less than value2, when compared using unsigned integer or unordered float values. The effect is identical to performing a clt.un instruction followed by a brtrue branch to the specific target instruction. The target instruction is represented as a 4-byte signed offset from the beginning of the instruction following the current instruction.

Control can only be transferred to the first of these prefixes if the target instruction has one or more prefix codes. Control transfers into and out of try, catch, filter, and finally blocks cannot be performed by this instruction.

The following Emit method overload can use the blt.un opcode:

  • ILGenerator.Emit(OpCode, Label)

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

Platforms

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