BitOperations.LeadingZeroCount Method

Definition

Namespace:

System.Numerics

Assembly:

System.Runtime.dll

Overloads

LeadingZeroCount(UInt32)	Counts the number of leading zero bits in an unsigned 32-bit integer mask.
LeadingZeroCount(UInt64)	Counts the number of leading zero bits in an unsigned 64-bit integer mask.
LeadingZeroCount(UIntPtr)	Counts the number of leading zero bits in a mask. Similar in behavior to the x86 instruction LZCNT.

LeadingZeroCount(UInt32)

Source:

BitOperations.cs

Important

This API is not CLS-compliant.

Counts the number of leading zero bits in an unsigned 32-bit integer mask.

public:
 static int LeadingZeroCount(System::UInt32 value);

[System.CLSCompliant(false)]
public static int LeadingZeroCount (uint value);

[<System.CLSCompliant(false)>]
static member LeadingZeroCount : uint32 -> int

Public Shared Function LeadingZeroCount (value As UInteger) As Integer

Parameters

value

UInt32

The mask.

Returns

Int32

The number of leading zero bits in a mask.

Attributes

CLSCompliantAttribute

Remarks

This method is similar in behavior to the x86 instruction LZCNT.

LeadingZeroCount(UInt64)

Source:

BitOperations.cs

Important

This API is not CLS-compliant.

Counts the number of leading zero bits in an unsigned 64-bit integer mask.

public:
 static int LeadingZeroCount(System::UInt64 value);

[System.CLSCompliant(false)]
public static int LeadingZeroCount (ulong value);

[<System.CLSCompliant(false)>]
static member LeadingZeroCount : uint64 -> int

Public Shared Function LeadingZeroCount (value As ULong) As Integer

Parameters

value

UInt64

The mask.

Returns

Int32

The number of leading zero bits in a mask.

Attributes

CLSCompliantAttribute

Remarks

This method is similar in behavior to the x86 instruction LZCNT.

LeadingZeroCount(UIntPtr)

Source:

BitOperations.cs

Important

This API is not CLS-compliant.

Counts the number of leading zero bits in a mask. Similar in behavior to the x86 instruction LZCNT.

public:
 static int LeadingZeroCount(UIntPtr value);

[System.CLSCompliant(false)]
public static int LeadingZeroCount (UIntPtr value);

[<System.CLSCompliant(false)>]
static member LeadingZeroCount : unativeint -> int

Public Shared Function LeadingZeroCount (value As UIntPtr) As Integer

Parameters

value

UIntPtr

unativeint

The value.

Returns

Int32

The count of leading zeros bits in a mask.

Attributes

CLSCompliantAttribute