1 #![allow(unused_imports)]
2 use super::MaskElement;
3 use crate::simd::intrinsics;
4 use crate::simd::{LaneCount, Simd, SupportedLaneCount, ToBitMask};
5 use core::marker::PhantomData;
7 /// A mask where each lane is represented by a single bit.
9 pub struct Mask<T, const LANES: usize>(
10 <LaneCount<LANES> as SupportedLaneCount>::BitMask,
15 LaneCount<LANES>: SupportedLaneCount;
17 impl<T, const LANES: usize> Copy for Mask<T, LANES>
20 LaneCount<LANES>: SupportedLaneCount,
24 impl<T, const LANES: usize> Clone for Mask<T, LANES>
27 LaneCount<LANES>: SupportedLaneCount,
29 fn clone(&self) -> Self {
34 impl<T, const LANES: usize> PartialEq for Mask<T, LANES>
37 LaneCount<LANES>: SupportedLaneCount,
39 fn eq(&self, other: &Self) -> bool {
40 self.0.as_ref() == other.0.as_ref()
44 impl<T, const LANES: usize> PartialOrd for Mask<T, LANES>
47 LaneCount<LANES>: SupportedLaneCount,
49 fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
50 self.0.as_ref().partial_cmp(other.0.as_ref())
54 impl<T, const LANES: usize> Eq for Mask<T, LANES>
57 LaneCount<LANES>: SupportedLaneCount,
61 impl<T, const LANES: usize> Ord for Mask<T, LANES>
64 LaneCount<LANES>: SupportedLaneCount,
66 fn cmp(&self, other: &Self) -> core::cmp::Ordering {
67 self.0.as_ref().cmp(other.0.as_ref())
71 impl<T, const LANES: usize> Mask<T, LANES>
74 LaneCount<LANES>: SupportedLaneCount,
77 #[must_use = "method returns a new mask and does not mutate the original value"]
78 pub fn splat(value: bool) -> Self {
79 let mut mask = <LaneCount<LANES> as SupportedLaneCount>::BitMask::default();
81 mask.as_mut().fill(u8::MAX)
83 mask.as_mut().fill(u8::MIN)
86 *mask.as_mut().last_mut().unwrap() &= u8::MAX >> (8 - LANES % 8);
88 Self(mask, PhantomData)
92 #[must_use = "method returns a new bool and does not mutate the original value"]
93 pub unsafe fn test_unchecked(&self, lane: usize) -> bool {
94 (self.0.as_ref()[lane / 8] >> (lane % 8)) & 0x1 > 0
98 pub unsafe fn set_unchecked(&mut self, lane: usize, value: bool) {
100 self.0.as_mut()[lane / 8] ^= ((value ^ self.test_unchecked(lane)) as u8) << (lane % 8)
105 #[must_use = "method returns a new vector and does not mutate the original value"]
106 pub fn to_int(self) -> Simd<T, LANES> {
108 intrinsics::simd_select_bitmask(self.0, Simd::splat(T::TRUE), Simd::splat(T::FALSE))
113 #[must_use = "method returns a new mask and does not mutate the original value"]
114 pub unsafe fn from_int_unchecked(value: Simd<T, LANES>) -> Self {
115 unsafe { Self(intrinsics::simd_bitmask(value), PhantomData) }
119 pub fn to_bitmask_integer<U>(self) -> U
121 super::Mask<T, LANES>: ToBitMask<BitMask = U>,
123 // Safety: these are the same types
124 unsafe { core::mem::transmute_copy(&self.0) }
128 pub fn from_bitmask_integer<U>(bitmask: U) -> Self
130 super::Mask<T, LANES>: ToBitMask<BitMask = U>,
132 // Safety: these are the same types
133 unsafe { Self(core::mem::transmute_copy(&bitmask), PhantomData) }
137 #[must_use = "method returns a new mask and does not mutate the original value"]
138 pub fn convert<U>(self) -> Mask<U, LANES>
142 // Safety: bitmask layout does not depend on the element width
143 unsafe { core::mem::transmute_copy(&self) }
147 #[must_use = "method returns a new bool and does not mutate the original value"]
148 pub fn any(self) -> bool {
149 self != Self::splat(false)
153 #[must_use = "method returns a new bool and does not mutate the original value"]
154 pub fn all(self) -> bool {
155 self == Self::splat(true)
159 impl<T, const LANES: usize> core::ops::BitAnd for Mask<T, LANES>
162 LaneCount<LANES>: SupportedLaneCount,
163 <LaneCount<LANES> as SupportedLaneCount>::BitMask: AsRef<[u8]> + AsMut<[u8]>,
167 #[must_use = "method returns a new mask and does not mutate the original value"]
168 fn bitand(mut self, rhs: Self) -> Self {
169 for (l, r) in self.0.as_mut().iter_mut().zip(rhs.0.as_ref().iter()) {
176 impl<T, const LANES: usize> core::ops::BitOr for Mask<T, LANES>
179 LaneCount<LANES>: SupportedLaneCount,
180 <LaneCount<LANES> as SupportedLaneCount>::BitMask: AsRef<[u8]> + AsMut<[u8]>,
184 #[must_use = "method returns a new mask and does not mutate the original value"]
185 fn bitor(mut self, rhs: Self) -> Self {
186 for (l, r) in self.0.as_mut().iter_mut().zip(rhs.0.as_ref().iter()) {
193 impl<T, const LANES: usize> core::ops::BitXor for Mask<T, LANES>
196 LaneCount<LANES>: SupportedLaneCount,
200 #[must_use = "method returns a new mask and does not mutate the original value"]
201 fn bitxor(mut self, rhs: Self) -> Self::Output {
202 for (l, r) in self.0.as_mut().iter_mut().zip(rhs.0.as_ref().iter()) {
209 impl<T, const LANES: usize> core::ops::Not for Mask<T, LANES>
212 LaneCount<LANES>: SupportedLaneCount,
216 #[must_use = "method returns a new mask and does not mutate the original value"]
217 fn not(mut self) -> Self::Output {
218 for x in self.0.as_mut() {
222 *self.0.as_mut().last_mut().unwrap() &= u8::MAX >> (8 - LANES % 8);