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// This file is part of faster, the SIMD library for humans.
// Copyright 2017 Adam Niederer <adam.niederer@gmail.com>
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
use crate::core::ops::BitXor;
use crate::vecs::*;
pub trait Eq : Packed {
type Out : Pattern + BitXor<Self::Out, Output = Self::Out>;
/// Return a vector where each element at an index i is filled with 1s if
/// the elements of `self` and `other` at index i are equal, and filled with
/// zeroes otherwise.
///
/// ```
/// extern crate faster;
/// use faster::*;
///
/// # fn main() {
/// assert_eq!(u8s::interleave(0, 2).eq_mask(u8s(0)).be_u8s(), u8s::interleave(0xFF, 0).be_u8s());
/// assert_eq!(u32s::halfs(1, 0).eq_mask(u32s(0)), u32s::halfs(0, 0xFFFFFFFF));
/// # }
/// ```
fn eq_mask(&self, other: Self) -> Self::Out;
/// Return a vector where each element at an index i is filled with 1s if
/// the elements of `self` and `other` at index i are not equal, and filled
/// with zeroes otherwise.
///
/// ```
/// extern crate faster;
/// use faster::*;
///
/// # fn main() {
/// assert_eq!(u8s::interleave(0, 2).ne_mask(u8s(0)), u8s::interleave(0, 0xFF));
/// assert_eq!(u32s::halfs(1, 0).ne_mask(u32s(0)), u32s::halfs(0xFFFFFFFF, 0));
/// # }
/// ```
#[inline(always)]
fn ne_mask(&self, other: Self) -> Self::Out { self.eq_mask(other) ^ Self::Out::ones() }
}
macro_rules! rust_fallback_eq {
(impl $trait:tt for $type:tt where $feat:tt {
$($newfn:ident, $rustfn:ident => $mask:tt, $maskel:tt, $mmfn:tt ( $($mmfnargs:expr),* ), [$($n:expr),+]);*;}) => (
impl $trait for $type {
$(
type Out = $mask;
#[inline(always)]
#[cfg(target_feature = $feat)]
fn $newfn(&self, other: Self) -> $mask {
use crate::core::mem::transmute;
unsafe { transmute($mmfn(transmute(*self), transmute(other), $($mmfnargs),*)) }
}
#[inline(always)]
#[cfg(not(target_feature = $feat))]
fn $newfn(&self, other: Self) -> Self::Out {
fallback!();
use crate::core::mem::transmute;
unsafe {
Self::Out::new($(transmute(if self.extract($n).$rustfn(&other.extract($n)) {
$maskel::max_value()
} else {
$maskel::min_value()
})),*)
}
}
)*
}
);
}
macro_rules! test_packed_eq {
($vec:tt, $el:tt, $mask:tt, $maskel:tt, $name:tt) => {
#[test]
fn $name() {
assert_eq!($vec::halfs(1 as $el, 0 as $el).eq_mask($vec::splat(0 as $el)),
$mask::halfs(0, $maskel::max_value()));
assert_eq!($vec::interleave(1 as $el, 0 as $el).eq_mask($vec::splat(1 as $el)),
$mask::interleave($maskel::max_value(), 0));
assert_eq!($vec::halfs(1 as $el, 0 as $el).ne_mask($vec::splat(0 as $el)),
$mask::halfs($maskel::max_value(), 0));
assert_eq!($vec::interleave(1 as $el, 0 as $el).ne_mask($vec::splat(1 as $el)),
$mask::interleave(0, $maskel::max_value()));
}
}
}