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use super::sealed::Sealed;
use crate::simd::{intrinsics, LaneCount, Simd, SupportedLaneCount};
/// Operations on SIMD vectors of unsigned integers.
pub trait SimdUint: Copy + Sealed {
/// Scalar type contained by this SIMD vector type.
type Scalar;
/// Lanewise saturating add.
///
/// # Examples
/// ```
/// # #![feature(portable_simd)]
/// # #[cfg(feature = "as_crate")] use core_simd::simd;
/// # #[cfg(not(feature = "as_crate"))] use core::simd;
/// # use simd::{Simd, SimdUint};
/// use core::u32::MAX;
/// let x = Simd::from_array([2, 1, 0, MAX]);
/// let max = Simd::splat(MAX);
/// let unsat = x + max;
/// let sat = x.saturating_add(max);
/// assert_eq!(unsat, Simd::from_array([1, 0, MAX, MAX - 1]));
/// assert_eq!(sat, max);
/// ```
fn saturating_add(self, second: Self) -> Self;
/// Lanewise saturating subtract.
///
/// # Examples
/// ```
/// # #![feature(portable_simd)]
/// # #[cfg(feature = "as_crate")] use core_simd::simd;
/// # #[cfg(not(feature = "as_crate"))] use core::simd;
/// # use simd::{Simd, SimdUint};
/// use core::u32::MAX;
/// let x = Simd::from_array([2, 1, 0, MAX]);
/// let max = Simd::splat(MAX);
/// let unsat = x - max;
/// let sat = x.saturating_sub(max);
/// assert_eq!(unsat, Simd::from_array([3, 2, 1, 0]));
/// assert_eq!(sat, Simd::splat(0));
fn saturating_sub(self, second: Self) -> Self;
/// Returns the sum of the lanes of the vector, with wrapping addition.
fn reduce_sum(self) -> Self::Scalar;
/// Returns the product of the lanes of the vector, with wrapping multiplication.
fn reduce_product(self) -> Self::Scalar;
/// Returns the maximum lane in the vector.
fn reduce_max(self) -> Self::Scalar;
/// Returns the minimum lane in the vector.
fn reduce_min(self) -> Self::Scalar;
/// Returns the cumulative bitwise "and" across the lanes of the vector.
fn reduce_and(self) -> Self::Scalar;
/// Returns the cumulative bitwise "or" across the lanes of the vector.
fn reduce_or(self) -> Self::Scalar;
/// Returns the cumulative bitwise "xor" across the lanes of the vector.
fn reduce_xor(self) -> Self::Scalar;
}
macro_rules! impl_trait {
{ $($ty:ty),* } => {
$(
impl<const LANES: usize> Sealed for Simd<$ty, LANES>
where
LaneCount<LANES>: SupportedLaneCount,
{
}
impl<const LANES: usize> SimdUint for Simd<$ty, LANES>
where
LaneCount<LANES>: SupportedLaneCount,
{
type Scalar = $ty;
#[inline]
fn saturating_add(self, second: Self) -> Self {
// Safety: `self` is a vector
unsafe { intrinsics::simd_saturating_add(self, second) }
}
#[inline]
fn saturating_sub(self, second: Self) -> Self {
// Safety: `self` is a vector
unsafe { intrinsics::simd_saturating_sub(self, second) }
}
#[inline]
fn reduce_sum(self) -> Self::Scalar {
// Safety: `self` is an integer vector
unsafe { intrinsics::simd_reduce_add_ordered(self, 0) }
}
#[inline]
fn reduce_product(self) -> Self::Scalar {
// Safety: `self` is an integer vector
unsafe { intrinsics::simd_reduce_mul_ordered(self, 1) }
}
#[inline]
fn reduce_max(self) -> Self::Scalar {
// Safety: `self` is an integer vector
unsafe { intrinsics::simd_reduce_max(self) }
}
#[inline]
fn reduce_min(self) -> Self::Scalar {
// Safety: `self` is an integer vector
unsafe { intrinsics::simd_reduce_min(self) }
}
#[inline]
fn reduce_and(self) -> Self::Scalar {
// Safety: `self` is an integer vector
unsafe { intrinsics::simd_reduce_and(self) }
}
#[inline]
fn reduce_or(self) -> Self::Scalar {
// Safety: `self` is an integer vector
unsafe { intrinsics::simd_reduce_or(self) }
}
#[inline]
fn reduce_xor(self) -> Self::Scalar {
// Safety: `self` is an integer vector
unsafe { intrinsics::simd_reduce_xor(self) }
}
}
)*
}
}
impl_trait! { u8, u16, u32, u64, usize }