Function cast_slice_mut

cmov/src/slice.rs:331–344

Performs an unsafe pointer cast from one mutable slice type to the other. # Compile-time panics - If `T` and `U` differ in size - If `T` and `U` differ in alignment

(slice: &mut [T])

/// - If `T` and `U` differ in size
/// - If `T` and `U` differ in alignment
unsafe fn cast_slice_mut<T, U>(slice: &mut [T]) -> &mut [U] {
    const {
        assert!(size_of::<T>() == size_of::<U>(), "T/U size differs");
        assert!(align_of::<T>() == align_of::<U>(), "T/U alignment differs");
    }

    // SAFETY:
    // - Slices are of same-sized/aligned types as asserted above.
    // - It's up to the caller to ensure the pointer cast from `T` to `U` itself is valid.
    #[allow(unsafe_code)]
    unsafe {
        &mut *(ptr::from_mut::<[T]>(slice) as *mut [U])
    }
}

/// Compare the two remainder slices by loading a `Word` then performing `cmovne`.
#[inline]