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use int::Int;

/// Clears all bits below the least significant zero of `x` and sets all other
/// bits.
///
/// If the least significant bit of `x` is 0, it sets all bits.
///
/// # Intrinsic (when available TBM)
///
/// [`T1MSKC`](http://support.amd.com/TechDocs/24592.pdf): Inverse mask from
/// trailing ones (supports 32/64 bit registers).
///
/// # Example
///
/// ```
/// use bitintr::tbm::t1mskc;
///
/// assert_eq!(t1mskc(0b0101_0111u8), 0b1111_1000u8);
/// assert_eq!(t1mskc(0b0101_0110u8), 0b1111_1111u8);
/// ```
pub fn t1mskc<T: Int>(x: T) -> T {
    !x | (x.wrapping_add(T::one()))
}

pub trait T1MSKC {
    fn t1mskc(self) -> Self;
}

impl<T: Int> T1MSKC for T {
    fn t1mskc(self) -> T {
        t1mskc(self)
    }
}