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//! Implements `PartialOrd` for vector types.
//!
//! This implements a lexicographical order.
macro_rules! impl_cmp_partial_ord {
([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt) => {
impl $id {
/// Returns a wrapper that implements `PartialOrd`.
#[inline]
pub fn partial_lex_ord(&self) -> LexicographicallyOrdered<$id> {
LexicographicallyOrdered(*self)
}
}
impl crate::cmp::PartialOrd<LexicographicallyOrdered<$id>> for LexicographicallyOrdered<$id> {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<crate::cmp::Ordering> {
if PartialEq::eq(self, other) {
Some(crate::cmp::Ordering::Equal)
} else if PartialOrd::lt(self, other) {
Some(crate::cmp::Ordering::Less)
} else if PartialOrd::gt(self, other) {
Some(crate::cmp::Ordering::Greater)
} else {
None
}
}
#[inline]
fn lt(&self, other: &Self) -> bool {
let m_lt = self.0.lt(other.0);
let m_eq = self.0.eq(other.0);
for i in 0..$id::lanes() {
if m_eq.extract(i) {
continue;
}
return m_lt.extract(i);
}
false
}
#[inline]
fn le(&self, other: &Self) -> bool {
self.lt(other) | PartialEq::eq(self, other)
}
#[inline]
fn ge(&self, other: &Self) -> bool {
self.gt(other) | PartialEq::eq(self, other)
}
#[inline]
fn gt(&self, other: &Self) -> bool {
let m_gt = self.0.gt(other.0);
let m_eq = self.0.eq(other.0);
for i in 0..$id::lanes() {
if m_eq.extract(i) {
continue;
}
return m_gt.extract(i);
}
false
}
}
};
}
macro_rules! test_cmp_partial_ord_int {
([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt) => {
test_if!{
$test_tt:
paste::item! {
pub mod [<$id _cmp_PartialOrd>] {
use super::*;
#[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
fn partial_lex_ord() {
use crate::testing::utils::{test_cmp};
// constant values
let a = $id::splat(0);
let b = $id::splat(1);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
// variable values: a = [0, 1, 2, 3]; b = [3, 2, 1, 0]
let mut a = $id::splat(0);
let mut b = $id::splat(0);
for i in 0..$id::lanes() {
a = a.replace(i, i as $elem_ty);
b = b.replace(i, ($id::lanes() - i) as $elem_ty);
}
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
// variable values: a = [0, 1, 2, 3]; b = [0, 1, 2, 4]
let mut b = a;
b = b.replace(
$id::lanes() - 1,
a.extract($id::lanes() - 1) + 1 as $elem_ty
);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
if $id::lanes() > 2 {
// variable values a = [0, 1, 0, 0]; b = [0, 1, 2, 3]
let b = a;
let mut a = $id::splat(0);
a = a.replace(1, 1 as $elem_ty);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
// variable values: a = [0, 1, 2, 3]; b = [0, 1, 3, 2]
let mut b = a;
b = b.replace(
2, a.extract($id::lanes() - 1) + 1 as $elem_ty
);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(crate::cmp::Ordering::Equal));
}
}
}
}
}
};
}
macro_rules! test_cmp_partial_ord_mask {
([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt) => {
test_if!{
$test_tt:
paste::item! {
pub mod [<$id _cmp_PartialOrd>] {
use super::*;
#[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
fn partial_lex_ord() {
use crate::testing::utils::{test_cmp};
use crate::cmp::Ordering;
// constant values
let a = $id::splat(false);
let b = $id::splat(true);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Equal));
// variable values:
// a = [false, false, false, false];
// b = [false, false, false, true]
let a = $id::splat(false);
let mut b = $id::splat(false);
b = b.replace($id::lanes() - 1, true);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Equal));
// variable values:
// a = [true, true, true, false];
// b = [true, true, true, true]
let mut a = $id::splat(true);
let b = $id::splat(true);
a = a.replace($id::lanes() - 1, false);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Equal));
if $id::lanes() > 2 {
// variable values
// a = [false, true, false, false];
// b = [false, true, true, true]
let mut a = $id::splat(false);
let mut b = $id::splat(true);
a = a.replace(1, true);
b = b.replace(0, false);
test_cmp(a.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Less));
test_cmp(b.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Greater));
test_cmp(a.partial_lex_ord(), a.partial_lex_ord(),
Some(Ordering::Equal));
test_cmp(b.partial_lex_ord(), b.partial_lex_ord(),
Some(Ordering::Equal));
}
}
}
}
}
};
}