diff options
Diffstat (limited to 'third_party/rust/packed_simd/src/api/cmp/partial_ord.rs')
| -rw-r--r-- | third_party/rust/packed_simd/src/api/cmp/partial_ord.rs | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/third_party/rust/packed_simd/src/api/cmp/partial_ord.rs b/third_party/rust/packed_simd/src/api/cmp/partial_ord.rs new file mode 100644 index 0000000000..76ed9ebe4e --- /dev/null +++ b/third_party/rust/packed_simd/src/api/cmp/partial_ord.rs @@ -0,0 +1,230 @@ +//! 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)); + } + } + } + } + } + }; +} |