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//! blsmsk
/// Get mask up to lowest set bit.
pub trait Blsmsk {
/// Get mask up to lowest set bit.
///
/// Sets all the bits of the result to `1` up to and including the lowest
/// set bit of `self`.
///
/// If `self` is zero, all the bits of the result are set.
///
/// # Instructions
///
/// - [`BLSMSK`](http://www.felixcloutier.com/x86/BLSMSK.html):
/// - Description: Get mask up to lowest set bit.
/// - Architecture: x86.
/// - Instruction set: BMI.
/// - Registers: 32/64 bit.
///
/// # Example
///
/// ```
/// # use bitintr::*;
/// assert_eq!(0b0011_0000u8.blsmsk(), 0b0001_1111u8);
/// assert_eq!(0b0000_0000u8.blsmsk(), 0b1111_1111u8);
/// ```
fn blsmsk(self) -> Self;
}
macro_rules! impl_blsmsk {
($id:ident) => {
impl Blsmsk for $id {
#[inline]
fn blsmsk(self) -> Self {
self ^ (self.wrapping_sub(1))
}
}
};
}
impl_all!(impl_blsmsk: u8, u16, u32, u64, i8, i16, i32, i64);