// Generated from vec_mask.rs.tera template. Edit the template, not the generated file.

use core::fmt;
use core::ops::*;

use core::arch::aarch64::*;

#[repr(C)]
union UnionCast {
    a: [u32; 4],
    v: BVec4A,
}

/// Creates a 4-dimensional `bool` vector mask.
#[inline(always)]
#[must_use]
pub const fn bvec4a(x: bool, y: bool, z: bool, w: bool) -> BVec4A {
    BVec4A::new(x, y, z, w)
}

/// A 4-dimensional SIMD vector mask.
///
/// This type is 16 byte aligned.
#[derive(Clone, Copy)]
#[repr(transparent)]
pub struct BVec4A(pub(crate) uint32x4_t);

const MASK: [u32; 2] = [0, 0xff_ff_ff_ff];

impl BVec4A {
    /// All false.
    pub const FALSE: Self = Self::splat(false);

    /// All true.
    pub const TRUE: Self = Self::splat(true);

    /// Creates a new vector mask.
    #[inline(always)]
    #[must_use]
    pub const fn new(x: bool, y: bool, z: bool, w: bool) -> Self {
        unsafe {
            UnionCast {
                a: [
                    MASK[x as usize],
                    MASK[y as usize],
                    MASK[z as usize],
                    MASK[w as usize],
                ],
            }
            .v
        }
    }

    /// Creates a vector mask with all elements set to `v`.
    #[inline]
    #[must_use]
    pub const fn splat(v: bool) -> Self {
        Self::new(v, v, v, v)
    }

    /// Creates a new vector mask from a bool array.
    #[inline]
    #[must_use]
    pub const fn from_array(a: [bool; 4]) -> Self {
        Self::new(a[0], a[1], a[2], a[3])
    }

    /// Returns a bitmask with the lowest 4 bits set from the elements of `self`.
    ///
    /// A true element results in a `1` bit and a false element in a `0` bit.  Element `x` goes
    /// into the first lowest bit, element `y` into the second, etc.
    #[inline]
    #[must_use]
    pub fn bitmask(self) -> u32 {
        unsafe {
            let mma = vandq_u32(self.0, vld1q_u32([1, 2, 4, 8].as_ptr())); // [0 1 2 3]
            let mmb = vextq_u32(mma, mma, 2); // [2 3 0 1]
            let mmc = vorrq_u32(mma, mmb); // [0+2 1+3 0+2 1+3]
            let mmd = vextq_u32(mmc, mmc, 3); // [1+3 0+2 1+3 0+2]
            let mme = vorrq_u32(mmc, mmd); // [0+1+2+3 ...]
            vgetq_lane_u32(mme, 0)
        }
    }

    /// Returns true if any of the elements are true, false otherwise.
    #[inline]
    #[must_use]
    pub fn any(self) -> bool {
        self.bitmask() != 0
    }

    /// Returns true if all the elements are true, false otherwise.
    #[inline]
    #[must_use]
    pub fn all(self) -> bool {
        self.bitmask() == 0xf
    }

    /// Tests the value at `index`.
    ///
    /// Panics if `index` is greater than 3.
    #[inline]
    #[must_use]
    pub fn test(&self, index: usize) -> bool {
        match index {
            0 => (self.bitmask() & (1 << 0)) != 0,
            1 => (self.bitmask() & (1 << 1)) != 0,
            2 => (self.bitmask() & (1 << 2)) != 0,
            3 => (self.bitmask() & (1 << 3)) != 0,
            _ => panic!("index out of bounds"),
        }
    }

    /// Sets the element at `index`.
    ///
    /// Panics if `index` is greater than 3.
    #[inline]
    pub fn set(&mut self, index: usize, value: bool) {
        self.0 = match index {
            0 => unsafe { vsetq_lane_u32(MASK[value as usize], self.0, 0) },
            1 => unsafe { vsetq_lane_u32(MASK[value as usize], self.0, 1) },
            2 => unsafe { vsetq_lane_u32(MASK[value as usize], self.0, 2) },
            3 => unsafe { vsetq_lane_u32(MASK[value as usize], self.0, 3) },
            _ => panic!("index out of bounds"),
        }
    }

    #[inline]
    #[must_use]
    fn into_bool_array(self) -> [bool; 4] {
        let bitmask = self.bitmask();
        [
            (bitmask & 1) != 0,
            (bitmask & 2) != 0,
            (bitmask & 4) != 0,
            (bitmask & 8) != 0,
        ]
    }

    #[inline]
    #[must_use]
    fn into_u32_array(self) -> [u32; 4] {
        let bitmask = self.bitmask();
        [
            MASK[(bitmask & 1) as usize],
            MASK[((bitmask >> 1) & 1) as usize],
            MASK[((bitmask >> 2) & 1) as usize],
            MASK[((bitmask >> 3) & 1) as usize],
        ]
    }
}

impl Default for BVec4A {
    #[inline]
    fn default() -> Self {
        Self::FALSE
    }
}

impl PartialEq for BVec4A {
    #[inline]
    fn eq(&self, rhs: &Self) -> bool {
        self.bitmask().eq(&rhs.bitmask())
    }
}

impl Eq for BVec4A {}

impl core::hash::Hash for BVec4A {
    #[inline]
    fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
        self.bitmask().hash(state);
    }
}

impl BitAnd for BVec4A {
    type Output = Self;
    #[inline]
    fn bitand(self, rhs: Self) -> Self {
        Self(unsafe { vandq_u32(self.0, rhs.0) })
    }
}

impl BitAndAssign for BVec4A {
    #[inline]
    fn bitand_assign(&mut self, rhs: Self) {
        *self = self.bitand(rhs);
    }
}

impl BitOr for BVec4A {
    type Output = Self;
    #[inline]
    fn bitor(self, rhs: Self) -> Self {
        Self(unsafe { vorrq_u32(self.0, rhs.0) })
    }
}

impl BitOrAssign for BVec4A {
    #[inline]
    fn bitor_assign(&mut self, rhs: Self) {
        *self = self.bitor(rhs);
    }
}

impl BitXor for BVec4A {
    type Output = Self;
    #[inline]
    fn bitxor(self, rhs: Self) -> Self {
        Self(unsafe { veorq_u32(self.0, rhs.0) })
    }
}

impl BitXorAssign for BVec4A {
    #[inline]
    fn bitxor_assign(&mut self, rhs: Self) {
        *self = self.bitxor(rhs);
    }
}

impl Not for BVec4A {
    type Output = Self;
    #[inline]
    fn not(self) -> Self {
        Self(unsafe { vmvnq_u32(self.0) })
    }
}

impl From<BVec4A> for uint32x4_t {
    #[inline]
    fn from(t: BVec4A) -> Self {
        t.0
    }
}

impl fmt::Debug for BVec4A {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let arr = self.into_u32_array();
        write!(
            f,
            "{}({:#x}, {:#x}, {:#x}, {:#x})",
            stringify!(BVec4A),
            arr[0],
            arr[1],
            arr[2],
            arr[3]
        )
    }
}

impl fmt::Display for BVec4A {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let arr = self.into_bool_array();
        write!(f, "[{}, {}, {}, {}]", arr[0], arr[1], arr[2], arr[3])
    }
}

impl From<[bool; 4]> for BVec4A {
    #[inline]
    fn from(a: [bool; 4]) -> Self {
        Self::from_array(a)
    }
}

impl From<BVec4A> for [bool; 4] {
    #[inline]
    fn from(mask: BVec4A) -> Self {
        mask.into_bool_array()
    }
}

impl From<BVec4A> for [u32; 4] {
    #[inline]
    fn from(mask: BVec4A) -> Self {
        mask.into_u32_array()
    }
}
