RoundUpToPowerOf2() [2/2]

static ulong System.Numerics.BitOperations.RoundUpToPowerOf2 ( ulong value )

inlinestatic

Definition at line 112 of file BitOperations.cs.

    {
        if (Lzcnt.X64.IsSupported || ArmBase.Arm64.IsSupported)
        {
            int num = 64 - LeadingZeroCount(value - 1);
            return (1uL ^ (ulong)(num >> 6)) << num;
        }
        value--;
        value |= value >> 1;
        value |= value >> 2;
        value |= value >> 4;
        value |= value >> 8;
        value |= value >> 16;
        value |= value >> 32;
        return value + 1;
    }

References System.Runtime.Intrinsics.Arm.ArmBase.Arm64.IsSupported, System.Runtime.Intrinsics.X86.Lzcnt.X64.IsSupported, System.Numerics.BitOperations.LeadingZeroCount(), and System.value.