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OpCodes.Conv_Ovf_I1_Un Field

Converts the unsigned value on top of the evaluation stack to signed int8 and extends it to int32, throwing OverflowException on overflow.

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

public static readonly OpCode Conv_Ovf_I1_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

82

conv.ovf.i1.un

Converts an unsigned value to an int8 (on the stack as int32) and throw an exception on overflow.

The stack transitional behavior, in sequential order, is:

  1. value is pushed onto the stack.

  2. value is popped from the stack and the conversion operation is attempted. If overflow occurs, an exception is thrown.

  3. If the conversion is successful, the resulting value is pushed onto the stack.

The conv.ovf.i1.un opcode converts the value on top of the stack to the type specified in the opcode, and places that converted value on the top of the stack. If the value is too large or too small to be represented by the target type, an exception is thrown.

Conversions from floating-point numbers to integer values truncate the number toward zero. Note that integer values of less than 4 bytes are extended to int32 when they are loaded onto the evaluation stack (unless conv.ovf.i or conv.ovf.u are used, in which case the result is also native int).

OverflowException is thrown if the result can not be represented in the result type.

The following Emit method overload can use the conv.ovf.i1.un opcode:

  • ILGenerator.Emit(OpCode)

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.

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