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OpCodes.Conv_I1 Field

Converts the value on top of the evaluation stack to int8, then extends (pads) it to int32.

[Visual Basic]
Public Shared ReadOnly Conv_I1 As OpCode
[C#]
public static readonly OpCode Conv_I1;
[C++]
public: static OpCode Conv_I1;
[JScript]
public static var Conv_I1 : OpCode;

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
67 conv.i1 Convert to int8, pushing int32 on stack.

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

The conv.i1 opcode converts the value on top of the stack to the type specified in the opcode, and leave that converted value on the top of the stack. Integer values of less than 4 bytes are extended to int32 when they are loaded onto the evaluation stack (unless conv.i or conv.u is used, in which case the result is also natural int). Floating-point values are converted to the F type.

Conversion from floating-point numbers to integer values truncates the number toward zero. When converting from an float64 to an float32, precision can be lost. If value is too large to fit in a float32 (F), positive infinity (if value is positive) or negative infinity (if value is negative) is returned. If overflow occurs converting one integer type to another, the high order bits are truncated. If the result is smaller than an int32, the value is sign-extended to fill the slot.

If overflow occurs converting a floating-point type to an integer the value returned is unspecified.

No exceptions are ever thrown when using this field. See Conv_Ovf_I1 and Conv_Ovf_I1_Un for equivalent instructions that will throw an exception when the result type can not properly represent the result value.

The following Emit constructor overload can use the conv.i1 opcode:

  • ILGenerator.Emit(OpCode)

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

OpCodes Class | OpCodes Members | System.Reflection.Emit Namespace

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