f32/sse2/vec4.rs

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

use crate::{f32::math, sse2::*, BVec4A, Vec2, Vec3, Vec3A};

#[cfg(not(target_arch = "spirv"))]
use core::fmt;
use core::iter::{Product, Sum};
use core::{f32, ops::*};

#[cfg(target_arch = "x86")]
use core::arch::x86::*;
#[cfg(target_arch = "x86_64")]
use core::arch::x86_64::*;

#[repr(C)]
union UnionCast {
    a: [f32; 4],
    v: Vec4,
}

/// Creates a 4-dimensional vector.
#[inline(always)]
#[must_use]
pub const fn vec4(x: f32, y: f32, z: f32, w: f32) -> Vec4 {
    Vec4::new(x, y, z, w)
}

/// A 4-dimensional vector.
///
/// SIMD vector types are used for storage on supported platforms.
///
/// This type is 16 byte aligned.
#[derive(Clone, Copy)]
#[repr(transparent)]
pub struct Vec4(pub(crate) __m128);

impl Vec4 {
    /// All zeroes.
    pub const ZERO: Self = Self::splat(0.0);

    /// All ones.
    pub const ONE: Self = Self::splat(1.0);

    /// All negative ones.
    pub const NEG_ONE: Self = Self::splat(-1.0);

    /// All `f32::MIN`.
    pub const MIN: Self = Self::splat(f32::MIN);

    /// All `f32::MAX`.
    pub const MAX: Self = Self::splat(f32::MAX);

    /// All `f32::NAN`.
    pub const NAN: Self = Self::splat(f32::NAN);

    /// All `f32::INFINITY`.
    pub const INFINITY: Self = Self::splat(f32::INFINITY);

    /// All `f32::NEG_INFINITY`.
    pub const NEG_INFINITY: Self = Self::splat(f32::NEG_INFINITY);

    /// A unit vector pointing along the positive X axis.
    pub const X: Self = Self::new(1.0, 0.0, 0.0, 0.0);

    /// A unit vector pointing along the positive Y axis.
    pub const Y: Self = Self::new(0.0, 1.0, 0.0, 0.0);

    /// A unit vector pointing along the positive Z axis.
    pub const Z: Self = Self::new(0.0, 0.0, 1.0, 0.0);

    /// A unit vector pointing along the positive W axis.
    pub const W: Self = Self::new(0.0, 0.0, 0.0, 1.0);

    /// A unit vector pointing along the negative X axis.
    pub const NEG_X: Self = Self::new(-1.0, 0.0, 0.0, 0.0);

    /// A unit vector pointing along the negative Y axis.
    pub const NEG_Y: Self = Self::new(0.0, -1.0, 0.0, 0.0);

    /// A unit vector pointing along the negative Z axis.
    pub const NEG_Z: Self = Self::new(0.0, 0.0, -1.0, 0.0);

    /// A unit vector pointing along the negative W axis.
    pub const NEG_W: Self = Self::new(0.0, 0.0, 0.0, -1.0);

    /// The unit axes.
    pub const AXES: [Self; 4] = [Self::X, Self::Y, Self::Z, Self::W];

    /// Creates a new vector.
    #[inline(always)]
    #[must_use]
    pub const fn new(x: f32, y: f32, z: f32, w: f32) -> Self {
        unsafe { UnionCast { a: [x, y, z, w] }.v }
    }

    /// Creates a vector with all elements set to `v`.
    #[inline]
    #[must_use]
    pub const fn splat(v: f32) -> Self {
        unsafe { UnionCast { a: [v; 4] }.v }
    }

    /// Creates a vector from the elements in `if_true` and `if_false`, selecting which to use
    /// for each element of `self`.
    ///
    /// A true element in the mask uses the corresponding element from `if_true`, and false
    /// uses the element from `if_false`.
    #[inline]
    #[must_use]
    pub fn select(mask: BVec4A, if_true: Self, if_false: Self) -> Self {
        Self(unsafe {
            _mm_or_ps(
                _mm_andnot_ps(mask.0, if_false.0),
                _mm_and_ps(if_true.0, mask.0),
            )
        })
    }

    /// Creates a new vector from an array.
    #[inline]
    #[must_use]
    pub const fn from_array(a: [f32; 4]) -> Self {
        Self::new(a[0], a[1], a[2], a[3])
    }

    /// `[x, y, z, w]`
    #[inline]
    #[must_use]
    pub const fn to_array(&self) -> [f32; 4] {
        unsafe { *(self as *const Vec4 as *const [f32; 4]) }
    }

    /// Creates a vector from the first 4 values in `slice`.
    ///
    /// # Panics
    ///
    /// Panics if `slice` is less than 4 elements long.
    #[inline]
    #[must_use]
    pub const fn from_slice(slice: &[f32]) -> Self {
        Self::new(slice[0], slice[1], slice[2], slice[3])
    }

    /// Writes the elements of `self` to the first 4 elements in `slice`.
    ///
    /// # Panics
    ///
    /// Panics if `slice` is less than 4 elements long.
    #[inline]
    pub fn write_to_slice(self, slice: &mut [f32]) {
        unsafe {
            assert!(slice.len() >= 4);
            _mm_storeu_ps(slice.as_mut_ptr(), self.0);
        }
    }

    /// Creates a 3D vector from the `x`, `y` and `z` elements of `self`, discarding `w`.
    ///
    /// Truncation to [`Vec3`] may also be performed by using [`self.xyz()`][crate::swizzles::Vec4Swizzles::xyz()].
    ///
    /// To truncate to [`Vec3A`] use [`Vec3A::from()`].
    #[inline]
    #[must_use]
    pub fn truncate(self) -> Vec3 {
        use crate::swizzles::Vec4Swizzles;
        self.xyz()
    }

    /// Computes the dot product of `self` and `rhs`.
    #[inline]
    #[must_use]
    pub fn dot(self, rhs: Self) -> f32 {
        unsafe { dot4(self.0, rhs.0) }
    }

    /// Returns a vector where every component is the dot product of `self` and `rhs`.
    #[inline]
    #[must_use]
    pub fn dot_into_vec(self, rhs: Self) -> Self {
        Self(unsafe { dot4_into_m128(self.0, rhs.0) })
    }

    /// Returns a vector containing the minimum values for each element of `self` and `rhs`.
    ///
    /// In other words this computes `[self.x.min(rhs.x), self.y.min(rhs.y), ..]`.
    #[inline]
    #[must_use]
    pub fn min(self, rhs: Self) -> Self {
        Self(unsafe { _mm_min_ps(self.0, rhs.0) })
    }

    /// Returns a vector containing the maximum values for each element of `self` and `rhs`.
    ///
    /// In other words this computes `[self.x.max(rhs.x), self.y.max(rhs.y), ..]`.
    #[inline]
    #[must_use]
    pub fn max(self, rhs: Self) -> Self {
        Self(unsafe { _mm_max_ps(self.0, rhs.0) })
    }

    /// Component-wise clamping of values, similar to [`f32::clamp`].
    ///
    /// Each element in `min` must be less-or-equal to the corresponding element in `max`.
    ///
    /// # Panics
    ///
    /// Will panic if `min` is greater than `max` when `glam_assert` is enabled.
    #[inline]
    #[must_use]
    pub fn clamp(self, min: Self, max: Self) -> Self {
        glam_assert!(min.cmple(max).all(), "clamp: expected min <= max");
        self.max(min).min(max)
    }

    /// Returns the horizontal minimum of `self`.
    ///
    /// In other words this computes `min(x, y, ..)`.
    #[inline]
    #[must_use]
    pub fn min_element(self) -> f32 {
        unsafe {
            let v = self.0;
            let v = _mm_min_ps(v, _mm_shuffle_ps(v, v, 0b00_00_11_10));
            let v = _mm_min_ps(v, _mm_shuffle_ps(v, v, 0b00_00_00_01));
            _mm_cvtss_f32(v)
        }
    }

    /// Returns the horizontal maximum of `self`.
    ///
    /// In other words this computes `max(x, y, ..)`.
    #[inline]
    #[must_use]
    pub fn max_element(self) -> f32 {
        unsafe {
            let v = self.0;
            let v = _mm_max_ps(v, _mm_shuffle_ps(v, v, 0b00_00_11_10));
            let v = _mm_max_ps(v, _mm_shuffle_ps(v, v, 0b00_00_00_01));
            _mm_cvtss_f32(v)
        }
    }

    /// Returns a vector mask containing the result of a `==` comparison for each element of
    /// `self` and `rhs`.
    ///
    /// In other words, this computes `[self.x == rhs.x, self.y == rhs.y, ..]` for all
    /// elements.
    #[inline]
    #[must_use]
    pub fn cmpeq(self, rhs: Self) -> BVec4A {
        BVec4A(unsafe { _mm_cmpeq_ps(self.0, rhs.0) })
    }

    /// Returns a vector mask containing the result of a `!=` comparison for each element of
    /// `self` and `rhs`.
    ///
    /// In other words this computes `[self.x != rhs.x, self.y != rhs.y, ..]` for all
    /// elements.
    #[inline]
    #[must_use]
    pub fn cmpne(self, rhs: Self) -> BVec4A {
        BVec4A(unsafe { _mm_cmpneq_ps(self.0, rhs.0) })
    }

    /// Returns a vector mask containing the result of a `>=` comparison for each element of
    /// `self` and `rhs`.
    ///
    /// In other words this computes `[self.x >= rhs.x, self.y >= rhs.y, ..]` for all
    /// elements.
    #[inline]
    #[must_use]
    pub fn cmpge(self, rhs: Self) -> BVec4A {
        BVec4A(unsafe { _mm_cmpge_ps(self.0, rhs.0) })
    }

    /// Returns a vector mask containing the result of a `>` comparison for each element of
    /// `self` and `rhs`.
    ///
    /// In other words this computes `[self.x > rhs.x, self.y > rhs.y, ..]` for all
    /// elements.
    #[inline]
    #[must_use]
    pub fn cmpgt(self, rhs: Self) -> BVec4A {
        BVec4A(unsafe { _mm_cmpgt_ps(self.0, rhs.0) })
    }

    /// Returns a vector mask containing the result of a `<=` comparison for each element of
    /// `self` and `rhs`.
    ///
    /// In other words this computes `[self.x <= rhs.x, self.y <= rhs.y, ..]` for all
    /// elements.
    #[inline]
    #[must_use]
    pub fn cmple(self, rhs: Self) -> BVec4A {
        BVec4A(unsafe { _mm_cmple_ps(self.0, rhs.0) })
    }

    /// Returns a vector mask containing the result of a `<` comparison for each element of
    /// `self` and `rhs`.
    ///
    /// In other words this computes `[self.x < rhs.x, self.y < rhs.y, ..]` for all
    /// elements.
    #[inline]
    #[must_use]
    pub fn cmplt(self, rhs: Self) -> BVec4A {
        BVec4A(unsafe { _mm_cmplt_ps(self.0, rhs.0) })
    }

    /// Returns a vector containing the absolute value of each element of `self`.
    #[inline]
    #[must_use]
    pub fn abs(self) -> Self {
        Self(unsafe { crate::sse2::m128_abs(self.0) })
    }

    /// Returns a vector with elements representing the sign of `self`.
    ///
    /// - `1.0` if the number is positive, `+0.0` or `INFINITY`
    /// - `-1.0` if the number is negative, `-0.0` or `NEG_INFINITY`
    /// - `NAN` if the number is `NAN`
    #[inline]
    #[must_use]
    pub fn signum(self) -> Self {
        unsafe {
            let result = Self(_mm_or_ps(_mm_and_ps(self.0, Self::NEG_ONE.0), Self::ONE.0));
            let mask = self.is_nan_mask();
            Self::select(mask, self, result)
        }
    }

    /// Returns a vector with signs of `rhs` and the magnitudes of `self`.
    #[inline]
    #[must_use]
    pub fn copysign(self, rhs: Self) -> Self {
        unsafe {
            let mask = Self::splat(-0.0);
            Self(_mm_or_ps(
                _mm_and_ps(rhs.0, mask.0),
                _mm_andnot_ps(mask.0, self.0),
            ))
        }
    }

    /// Returns a bitmask with the lowest 4 bits set to the sign bits from the elements of `self`.
    ///
    /// A negative element results in a `1` bit and a positive element in a `0` bit.  Element `x` goes
    /// into the first lowest bit, element `y` into the second, etc.
    #[inline]
    #[must_use]
    pub fn is_negative_bitmask(self) -> u32 {
        unsafe { _mm_movemask_ps(self.0) as u32 }
    }

    /// Returns `true` if, and only if, all elements are finite.  If any element is either
    /// `NaN`, positive or negative infinity, this will return `false`.
    #[inline]
    #[must_use]
    pub fn is_finite(self) -> bool {
        self.x.is_finite() && self.y.is_finite() && self.z.is_finite() && self.w.is_finite()
    }

    /// Returns `true` if any elements are `NaN`.
    #[inline]
    #[must_use]
    pub fn is_nan(self) -> bool {
        self.is_nan_mask().any()
    }

    /// Performs `is_nan` on each element of self, returning a vector mask of the results.
    ///
    /// In other words, this computes `[x.is_nan(), y.is_nan(), z.is_nan(), w.is_nan()]`.
    #[inline]
    #[must_use]
    pub fn is_nan_mask(self) -> BVec4A {
        BVec4A(unsafe { _mm_cmpunord_ps(self.0, self.0) })
    }

    /// Computes the length of `self`.
    #[doc(alias = "magnitude")]
    #[inline]
    #[must_use]
    pub fn length(self) -> f32 {
        unsafe {
            let dot = dot4_in_x(self.0, self.0);
            _mm_cvtss_f32(_mm_sqrt_ps(dot))
        }
    }

    /// Computes the squared length of `self`.
    ///
    /// This is faster than `length()` as it avoids a square root operation.
    #[doc(alias = "magnitude2")]
    #[inline]
    #[must_use]
    pub fn length_squared(self) -> f32 {
        self.dot(self)
    }

    /// Computes `1.0 / length()`.
    ///
    /// For valid results, `self` must _not_ be of length zero.
    #[inline]
    #[must_use]
    pub fn length_recip(self) -> f32 {
        unsafe {
            let dot = dot4_in_x(self.0, self.0);
            _mm_cvtss_f32(_mm_div_ps(Self::ONE.0, _mm_sqrt_ps(dot)))
        }
    }

    /// Computes the Euclidean distance between two points in space.
    #[inline]
    #[must_use]
    pub fn distance(self, rhs: Self) -> f32 {
        (self - rhs).length()
    }

    /// Compute the squared euclidean distance between two points in space.
    #[inline]
    #[must_use]
    pub fn distance_squared(self, rhs: Self) -> f32 {
        (self - rhs).length_squared()
    }

    /// Returns the element-wise quotient of [Euclidean division] of `self` by `rhs`.
    #[inline]
    #[must_use]
    pub fn div_euclid(self, rhs: Self) -> Self {
        Self::new(
            math::div_euclid(self.x, rhs.x),
            math::div_euclid(self.y, rhs.y),
            math::div_euclid(self.z, rhs.z),
            math::div_euclid(self.w, rhs.w),
        )
    }

    /// Returns the element-wise remainder of [Euclidean division] of `self` by `rhs`.
    ///
    /// [Euclidean division]: f32::rem_euclid
    #[inline]
    #[must_use]
    pub fn rem_euclid(self, rhs: Self) -> Self {
        Self::new(
            math::rem_euclid(self.x, rhs.x),
            math::rem_euclid(self.y, rhs.y),
            math::rem_euclid(self.z, rhs.z),
            math::rem_euclid(self.w, rhs.w),
        )
    }

    /// Returns `self` normalized to length 1.0.
    ///
    /// For valid results, `self` must _not_ be of length zero, nor very close to zero.
    ///
    /// See also [`Self::try_normalize()`] and [`Self::normalize_or_zero()`].
    ///
    /// Panics
    ///
    /// Will panic if `self` is zero length when `glam_assert` is enabled.
    #[inline]
    #[must_use]
    pub fn normalize(self) -> Self {
        unsafe {
            let length = _mm_sqrt_ps(dot4_into_m128(self.0, self.0));
            #[allow(clippy::let_and_return)]
            let normalized = Self(_mm_div_ps(self.0, length));
            glam_assert!(normalized.is_finite());
            normalized
        }
    }

    /// Returns `self` normalized to length 1.0 if possible, else returns `None`.
    ///
    /// In particular, if the input is zero (or very close to zero), or non-finite,
    /// the result of this operation will be `None`.
    ///
    /// See also [`Self::normalize_or_zero()`].
    #[inline]
    #[must_use]
    pub fn try_normalize(self) -> Option<Self> {
        let rcp = self.length_recip();
        if rcp.is_finite() && rcp > 0.0 {
            Some(self * rcp)
        } else {
            None
        }
    }

    /// Returns `self` normalized to length 1.0 if possible, else returns zero.
    ///
    /// In particular, if the input is zero (or very close to zero), or non-finite,
    /// the result of this operation will be zero.
    ///
    /// See also [`Self::try_normalize()`].
    #[inline]
    #[must_use]
    pub fn normalize_or_zero(self) -> Self {
        let rcp = self.length_recip();
        if rcp.is_finite() && rcp > 0.0 {
            self * rcp
        } else {
            Self::ZERO
        }
    }

    /// Returns whether `self` is length `1.0` or not.
    ///
    /// Uses a precision threshold of `1e-6`.
    #[inline]
    #[must_use]
    pub fn is_normalized(self) -> bool {
        // TODO: do something with epsilon
        math::abs(self.length_squared() - 1.0) <= 1e-4
    }

    /// Returns the vector projection of `self` onto `rhs`.
    ///
    /// `rhs` must be of non-zero length.
    ///
    /// # Panics
    ///
    /// Will panic if `rhs` is zero length when `glam_assert` is enabled.
    #[inline]
    #[must_use]
    pub fn project_onto(self, rhs: Self) -> Self {
        let other_len_sq_rcp = rhs.dot(rhs).recip();
        glam_assert!(other_len_sq_rcp.is_finite());
        rhs * self.dot(rhs) * other_len_sq_rcp
    }

    /// Returns the vector rejection of `self` from `rhs`.
    ///
    /// The vector rejection is the vector perpendicular to the projection of `self` onto
    /// `rhs`, in rhs words the result of `self - self.project_onto(rhs)`.
    ///
    /// `rhs` must be of non-zero length.
    ///
    /// # Panics
    ///
    /// Will panic if `rhs` has a length of zero when `glam_assert` is enabled.
    #[inline]
    #[must_use]
    pub fn reject_from(self, rhs: Self) -> Self {
        self - self.project_onto(rhs)
    }

    /// Returns the vector projection of `self` onto `rhs`.
    ///
    /// `rhs` must be normalized.
    ///
    /// # Panics
    ///
    /// Will panic if `rhs` is not normalized when `glam_assert` is enabled.
    #[inline]
    #[must_use]
    pub fn project_onto_normalized(self, rhs: Self) -> Self {
        glam_assert!(rhs.is_normalized());
        rhs * self.dot(rhs)
    }

    /// Returns the vector rejection of `self` from `rhs`.
    ///
    /// The vector rejection is the vector perpendicular to the projection of `self` onto
    /// `rhs`, in rhs words the result of `self - self.project_onto(rhs)`.
    ///
    /// `rhs` must be normalized.
    ///
    /// # Panics
    ///
    /// Will panic if `rhs` is not normalized when `glam_assert` is enabled.
    #[inline]
    #[must_use]
    pub fn reject_from_normalized(self, rhs: Self) -> Self {
        self - self.project_onto_normalized(rhs)
    }

    /// Returns a vector containing the nearest integer to a number for each element of `self`.
    /// Round half-way cases away from 0.0.
    #[inline]
    #[must_use]
    pub fn round(self) -> Self {
        Self(unsafe { m128_round(self.0) })
    }

    /// Returns a vector containing the largest integer less than or equal to a number for each
    /// element of `self`.
    #[inline]
    #[must_use]
    pub fn floor(self) -> Self {
        Self(unsafe { m128_floor(self.0) })
    }

    /// Returns a vector containing the smallest integer greater than or equal to a number for
    /// each element of `self`.
    #[inline]
    #[must_use]
    pub fn ceil(self) -> Self {
        Self(unsafe { m128_ceil(self.0) })
    }

    /// Returns a vector containing the integer part each element of `self`. This means numbers are
    /// always truncated towards zero.
    #[inline]
    #[must_use]
    pub fn trunc(self) -> Self {
        Self(unsafe { m128_trunc(self.0) })
    }

    /// Returns a vector containing the fractional part of the vector, e.g. `self -
    /// self.floor()`.
    ///
    /// Note that this is fast but not precise for large numbers.
    #[inline]
    #[must_use]
    pub fn fract(self) -> Self {
        self - self.floor()
    }

    /// Returns a vector containing `e^self` (the exponential function) for each element of
    /// `self`.
    #[inline]
    #[must_use]
    pub fn exp(self) -> Self {
        Self::new(
            math::exp(self.x),
            math::exp(self.y),
            math::exp(self.z),
            math::exp(self.w),
        )
    }

    /// Returns a vector containing each element of `self` raised to the power of `n`.
    #[inline]
    #[must_use]
    pub fn powf(self, n: f32) -> Self {
        Self::new(
            math::powf(self.x, n),
            math::powf(self.y, n),
            math::powf(self.z, n),
            math::powf(self.w, n),
        )
    }

    /// Returns a vector containing the reciprocal `1.0/n` of each element of `self`.
    #[inline]
    #[must_use]
    pub fn recip(self) -> Self {
        Self(unsafe { _mm_div_ps(Self::ONE.0, self.0) })
    }

    /// Performs a linear interpolation between `self` and `rhs` based on the value `s`.
    ///
    /// When `s` is `0.0`, the result will be equal to `self`.  When `s` is `1.0`, the result
    /// will be equal to `rhs`. When `s` is outside of range `[0, 1]`, the result is linearly
    /// extrapolated.
    #[doc(alias = "mix")]
    #[inline]
    #[must_use]
    pub fn lerp(self, rhs: Self, s: f32) -> Self {
        self + ((rhs - self) * s)
    }

    /// Returns true if the absolute difference of all elements between `self` and `rhs` is
    /// less than or equal to `max_abs_diff`.
    ///
    /// This can be used to compare if two vectors contain similar elements. It works best when
    /// comparing with a known value. The `max_abs_diff` that should be used used depends on
    /// the values being compared against.
    ///
    /// For more see
    /// [comparing floating point numbers](https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/).
    #[inline]
    #[must_use]
    pub fn abs_diff_eq(self, rhs: Self, max_abs_diff: f32) -> bool {
        self.sub(rhs).abs().cmple(Self::splat(max_abs_diff)).all()
    }

    /// Returns a vector with a length no less than `min` and no more than `max`
    ///
    /// # Panics
    ///
    /// Will panic if `min` is greater than `max` when `glam_assert` is enabled.
    #[inline]
    #[must_use]
    pub fn clamp_length(self, min: f32, max: f32) -> Self {
        glam_assert!(min <= max);
        let length_sq = self.length_squared();
        if length_sq < min * min {
            min * (self / math::sqrt(length_sq))
        } else if length_sq > max * max {
            max * (self / math::sqrt(length_sq))
        } else {
            self
        }
    }

    /// Returns a vector with a length no more than `max`
    #[inline]
    #[must_use]
    pub fn clamp_length_max(self, max: f32) -> Self {
        let length_sq = self.length_squared();
        if length_sq > max * max {
            max * (self / math::sqrt(length_sq))
        } else {
            self
        }
    }

    /// Returns a vector with a length no less than `min`
    #[inline]
    #[must_use]
    pub fn clamp_length_min(self, min: f32) -> Self {
        let length_sq = self.length_squared();
        if length_sq < min * min {
            min * (self / math::sqrt(length_sq))
        } else {
            self
        }
    }

    /// Fused multiply-add. Computes `(self * a) + b` element-wise with only one rounding
    /// error, yielding a more accurate result than an unfused multiply-add.
    ///
    /// Using `mul_add` *may* be more performant than an unfused multiply-add if the target
    /// architecture has a dedicated fma CPU instruction. However, this is not always true,
    /// and will be heavily dependant on designing algorithms with specific target hardware in
    /// mind.
    #[inline]
    #[must_use]
    pub fn mul_add(self, a: Self, b: Self) -> Self {
        #[cfg(target_feature = "fma")]
        unsafe {
            Self(_mm_fmadd_ps(self.0, a.0, b.0))
        }
        #[cfg(not(target_feature = "fma"))]
        Self::new(
            math::mul_add(self.x, a.x, b.x),
            math::mul_add(self.y, a.y, b.y),
            math::mul_add(self.z, a.z, b.z),
            math::mul_add(self.w, a.w, b.w),
        )
    }

    /// Casts all elements of `self` to `f64`.
    #[inline]
    #[must_use]
    pub fn as_dvec4(&self) -> crate::DVec4 {
        crate::DVec4::new(self.x as f64, self.y as f64, self.z as f64, self.w as f64)
    }

    /// Casts all elements of `self` to `i16`.
    #[inline]
    #[must_use]
    pub fn as_i16vec4(&self) -> crate::I16Vec4 {
        crate::I16Vec4::new(self.x as i16, self.y as i16, self.z as i16, self.w as i16)
    }

    /// Casts all elements of `self` to `u16`.
    #[inline]
    #[must_use]
    pub fn as_u16vec4(&self) -> crate::U16Vec4 {
        crate::U16Vec4::new(self.x as u16, self.y as u16, self.z as u16, self.w as u16)
    }

    /// Casts all elements of `self` to `i32`.
    #[inline]
    #[must_use]
    pub fn as_ivec4(&self) -> crate::IVec4 {
        crate::IVec4::new(self.x as i32, self.y as i32, self.z as i32, self.w as i32)
    }

    /// Casts all elements of `self` to `u32`.
    #[inline]
    #[must_use]
    pub fn as_uvec4(&self) -> crate::UVec4 {
        crate::UVec4::new(self.x as u32, self.y as u32, self.z as u32, self.w as u32)
    }

    /// Casts all elements of `self` to `i64`.
    #[inline]
    #[must_use]
    pub fn as_i64vec4(&self) -> crate::I64Vec4 {
        crate::I64Vec4::new(self.x as i64, self.y as i64, self.z as i64, self.w as i64)
    }

    /// Casts all elements of `self` to `u64`.
    #[inline]
    #[must_use]
    pub fn as_u64vec4(&self) -> crate::U64Vec4 {
        crate::U64Vec4::new(self.x as u64, self.y as u64, self.z as u64, self.w as u64)
    }
}

impl Default for Vec4 {
    #[inline(always)]
    fn default() -> Self {
        Self::ZERO
    }
}

impl PartialEq for Vec4 {
    #[inline]
    fn eq(&self, rhs: &Self) -> bool {
        self.cmpeq(*rhs).all()
    }
}

impl Div<Vec4> for Vec4 {
    type Output = Self;
    #[inline]
    fn div(self, rhs: Self) -> Self {
        Self(unsafe { _mm_div_ps(self.0, rhs.0) })
    }
}

impl DivAssign<Vec4> for Vec4 {
    #[inline]
    fn div_assign(&mut self, rhs: Self) {
        self.0 = unsafe { _mm_div_ps(self.0, rhs.0) };
    }
}

impl Div<f32> for Vec4 {
    type Output = Self;
    #[inline]
    fn div(self, rhs: f32) -> Self {
        Self(unsafe { _mm_div_ps(self.0, _mm_set1_ps(rhs)) })
    }
}

impl DivAssign<f32> for Vec4 {
    #[inline]
    fn div_assign(&mut self, rhs: f32) {
        self.0 = unsafe { _mm_div_ps(self.0, _mm_set1_ps(rhs)) };
    }
}

impl Div<Vec4> for f32 {
    type Output = Vec4;
    #[inline]
    fn div(self, rhs: Vec4) -> Vec4 {
        Vec4(unsafe { _mm_div_ps(_mm_set1_ps(self), rhs.0) })
    }
}

impl Mul<Vec4> for Vec4 {
    type Output = Self;
    #[inline]
    fn mul(self, rhs: Self) -> Self {
        Self(unsafe { _mm_mul_ps(self.0, rhs.0) })
    }
}

impl MulAssign<Vec4> for Vec4 {
    #[inline]
    fn mul_assign(&mut self, rhs: Self) {
        self.0 = unsafe { _mm_mul_ps(self.0, rhs.0) };
    }
}

impl Mul<f32> for Vec4 {
    type Output = Self;
    #[inline]
    fn mul(self, rhs: f32) -> Self {
        Self(unsafe { _mm_mul_ps(self.0, _mm_set1_ps(rhs)) })
    }
}

impl MulAssign<f32> for Vec4 {
    #[inline]
    fn mul_assign(&mut self, rhs: f32) {
        self.0 = unsafe { _mm_mul_ps(self.0, _mm_set1_ps(rhs)) };
    }
}

impl Mul<Vec4> for f32 {
    type Output = Vec4;
    #[inline]
    fn mul(self, rhs: Vec4) -> Vec4 {
        Vec4(unsafe { _mm_mul_ps(_mm_set1_ps(self), rhs.0) })
    }
}

impl Add<Vec4> for Vec4 {
    type Output = Self;
    #[inline]
    fn add(self, rhs: Self) -> Self {
        Self(unsafe { _mm_add_ps(self.0, rhs.0) })
    }
}

impl AddAssign<Vec4> for Vec4 {
    #[inline]
    fn add_assign(&mut self, rhs: Self) {
        self.0 = unsafe { _mm_add_ps(self.0, rhs.0) };
    }
}

impl Add<f32> for Vec4 {
    type Output = Self;
    #[inline]
    fn add(self, rhs: f32) -> Self {
        Self(unsafe { _mm_add_ps(self.0, _mm_set1_ps(rhs)) })
    }
}

impl AddAssign<f32> for Vec4 {
    #[inline]
    fn add_assign(&mut self, rhs: f32) {
        self.0 = unsafe { _mm_add_ps(self.0, _mm_set1_ps(rhs)) };
    }
}

impl Add<Vec4> for f32 {
    type Output = Vec4;
    #[inline]
    fn add(self, rhs: Vec4) -> Vec4 {
        Vec4(unsafe { _mm_add_ps(_mm_set1_ps(self), rhs.0) })
    }
}

impl Sub<Vec4> for Vec4 {
    type Output = Self;
    #[inline]
    fn sub(self, rhs: Self) -> Self {
        Self(unsafe { _mm_sub_ps(self.0, rhs.0) })
    }
}

impl SubAssign<Vec4> for Vec4 {
    #[inline]
    fn sub_assign(&mut self, rhs: Vec4) {
        self.0 = unsafe { _mm_sub_ps(self.0, rhs.0) };
    }
}

impl Sub<f32> for Vec4 {
    type Output = Self;
    #[inline]
    fn sub(self, rhs: f32) -> Self {
        Self(unsafe { _mm_sub_ps(self.0, _mm_set1_ps(rhs)) })
    }
}

impl SubAssign<f32> for Vec4 {
    #[inline]
    fn sub_assign(&mut self, rhs: f32) {
        self.0 = unsafe { _mm_sub_ps(self.0, _mm_set1_ps(rhs)) };
    }
}

impl Sub<Vec4> for f32 {
    type Output = Vec4;
    #[inline]
    fn sub(self, rhs: Vec4) -> Vec4 {
        Vec4(unsafe { _mm_sub_ps(_mm_set1_ps(self), rhs.0) })
    }
}

impl Rem<Vec4> for Vec4 {
    type Output = Self;
    #[inline]
    fn rem(self, rhs: Self) -> Self {
        unsafe {
            let n = m128_floor(_mm_div_ps(self.0, rhs.0));
            Self(_mm_sub_ps(self.0, _mm_mul_ps(n, rhs.0)))
        }
    }
}

impl RemAssign<Vec4> for Vec4 {
    #[inline]
    fn rem_assign(&mut self, rhs: Self) {
        *self = self.rem(rhs);
    }
}

impl Rem<f32> for Vec4 {
    type Output = Self;
    #[inline]
    fn rem(self, rhs: f32) -> Self {
        self.rem(Self::splat(rhs))
    }
}

impl RemAssign<f32> for Vec4 {
    #[inline]
    fn rem_assign(&mut self, rhs: f32) {
        *self = self.rem(Self::splat(rhs));
    }
}

impl Rem<Vec4> for f32 {
    type Output = Vec4;
    #[inline]
    fn rem(self, rhs: Vec4) -> Vec4 {
        Vec4::splat(self).rem(rhs)
    }
}

#[cfg(not(target_arch = "spirv"))]
impl AsRef<[f32; 4]> for Vec4 {
    #[inline]
    fn as_ref(&self) -> &[f32; 4] {
        unsafe { &*(self as *const Vec4 as *const [f32; 4]) }
    }
}

#[cfg(not(target_arch = "spirv"))]
impl AsMut<[f32; 4]> for Vec4 {
    #[inline]
    fn as_mut(&mut self) -> &mut [f32; 4] {
        unsafe { &mut *(self as *mut Vec4 as *mut [f32; 4]) }
    }
}

impl Sum for Vec4 {
    #[inline]
    fn sum<I>(iter: I) -> Self
    where
        I: Iterator<Item = Self>,
    {
        iter.fold(Self::ZERO, Self::add)
    }
}

impl<'a> Sum<&'a Self> for Vec4 {
    #[inline]
    fn sum<I>(iter: I) -> Self
    where
        I: Iterator<Item = &'a Self>,
    {
        iter.fold(Self::ZERO, |a, &b| Self::add(a, b))
    }
}

impl Product for Vec4 {
    #[inline]
    fn product<I>(iter: I) -> Self
    where
        I: Iterator<Item = Self>,
    {
        iter.fold(Self::ONE, Self::mul)
    }
}

impl<'a> Product<&'a Self> for Vec4 {
    #[inline]
    fn product<I>(iter: I) -> Self
    where
        I: Iterator<Item = &'a Self>,
    {
        iter.fold(Self::ONE, |a, &b| Self::mul(a, b))
    }
}

impl Neg for Vec4 {
    type Output = Self;
    #[inline]
    fn neg(self) -> Self {
        Self(unsafe { _mm_xor_ps(_mm_set1_ps(-0.0), self.0) })
    }
}

impl Index<usize> for Vec4 {
    type Output = f32;
    #[inline]
    fn index(&self, index: usize) -> &Self::Output {
        match index {
            0 => &self.x,
            1 => &self.y,
            2 => &self.z,
            3 => &self.w,
            _ => panic!("index out of bounds"),
        }
    }
}

impl IndexMut<usize> for Vec4 {
    #[inline]
    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
        match index {
            0 => &mut self.x,
            1 => &mut self.y,
            2 => &mut self.z,
            3 => &mut self.w,
            _ => panic!("index out of bounds"),
        }
    }
}

#[cfg(not(target_arch = "spirv"))]
impl fmt::Display for Vec4 {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "[{}, {}, {}, {}]", self.x, self.y, self.z, self.w)
    }
}

#[cfg(not(target_arch = "spirv"))]
impl fmt::Debug for Vec4 {
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt.debug_tuple(stringify!(Vec4))
            .field(&self.x)
            .field(&self.y)
            .field(&self.z)
            .field(&self.w)
            .finish()
    }
}

impl From<Vec4> for __m128 {
    #[inline]
    fn from(t: Vec4) -> Self {
        t.0
    }
}

impl From<__m128> for Vec4 {
    #[inline]
    fn from(t: __m128) -> Self {
        Self(t)
    }
}

impl From<[f32; 4]> for Vec4 {
    #[inline]
    fn from(a: [f32; 4]) -> Self {
        Self(unsafe { _mm_loadu_ps(a.as_ptr()) })
    }
}

impl From<Vec4> for [f32; 4] {
    #[inline]
    fn from(v: Vec4) -> Self {
        use crate::Align16;
        use core::mem::MaybeUninit;
        let mut out: MaybeUninit<Align16<Self>> = MaybeUninit::uninit();
        unsafe {
            _mm_store_ps(out.as_mut_ptr().cast(), v.0);
            out.assume_init().0
        }
    }
}

impl From<(f32, f32, f32, f32)> for Vec4 {
    #[inline]
    fn from(t: (f32, f32, f32, f32)) -> Self {
        Self::new(t.0, t.1, t.2, t.3)
    }
}

impl From<Vec4> for (f32, f32, f32, f32) {
    #[inline]
    fn from(v: Vec4) -> Self {
        use crate::Align16;
        use core::mem::MaybeUninit;
        let mut out: MaybeUninit<Align16<Self>> = MaybeUninit::uninit();
        unsafe {
            _mm_store_ps(out.as_mut_ptr().cast(), v.0);
            out.assume_init().0
        }
    }
}

impl From<(Vec3A, f32)> for Vec4 {
    #[inline]
    fn from((v, w): (Vec3A, f32)) -> Self {
        v.extend(w)
    }
}

impl From<(f32, Vec3A)> for Vec4 {
    #[inline]
    fn from((x, v): (f32, Vec3A)) -> Self {
        Self::new(x, v.x, v.y, v.z)
    }
}

impl From<(Vec3, f32)> for Vec4 {
    #[inline]
    fn from((v, w): (Vec3, f32)) -> Self {
        Self::new(v.x, v.y, v.z, w)
    }
}

impl From<(f32, Vec3)> for Vec4 {
    #[inline]
    fn from((x, v): (f32, Vec3)) -> Self {
        Self::new(x, v.x, v.y, v.z)
    }
}

impl From<(Vec2, f32, f32)> for Vec4 {
    #[inline]
    fn from((v, z, w): (Vec2, f32, f32)) -> Self {
        Self::new(v.x, v.y, z, w)
    }
}

impl From<(Vec2, Vec2)> for Vec4 {
    #[inline]
    fn from((v, u): (Vec2, Vec2)) -> Self {
        Self::new(v.x, v.y, u.x, u.y)
    }
}

impl Deref for Vec4 {
    type Target = crate::deref::Vec4<f32>;
    #[inline]
    fn deref(&self) -> &Self::Target {
        unsafe { &*(self as *const Self).cast() }
    }
}

impl DerefMut for Vec4 {
    #[inline]
    fn deref_mut(&mut self) -> &mut Self::Target {
        unsafe { &mut *(self as *mut Self).cast() }
    }
}