1 files changed, 126 insertions, 0 deletions
diff --git a/third_party/rust/packed_simd/src/masks.rs b/third_party/rust/packed_simd/src/masks.rs
new file mode 100644
index 0000000000..04534eab2b
--- /dev/null
+++ b/third_party/rust/packed_simd/src/masks.rs
@@ -0,0 +1,126 @@
+//! Mask types
+
+macro_rules! impl_mask_ty {
+    ($id:ident : $elem_ty:ident | #[$doc:meta]) => {
+        #[$doc]
+        #[derive(Copy, Clone)]
+        pub struct $id($elem_ty);
+
+        impl crate::sealed::Seal for $id {}
+        impl crate::sealed::Mask for $id {
+            #[inline]
+            fn test(&self) -> bool {
+                $id::test(self)
+            }
+        }
+
+        impl $id {
+            /// Instantiate a mask with `value`
+            #[inline]
+            pub fn new(x: bool) -> Self {
+                if x {
+                    $id(!0)
+                } else {
+                    $id(0)
+                }
+            }
+            /// Test if the mask is set
+            #[inline]
+            pub fn test(&self) -> bool {
+                self.0 != 0
+            }
+        }
+
+        impl Default for $id {
+            #[inline]
+            fn default() -> Self {
+                $id(0)
+            }
+        }
+
+        #[allow(clippy::partialeq_ne_impl)]
+        impl PartialEq<$id> for $id {
+            #[inline]
+            fn eq(&self, other: &Self) -> bool {
+                self.0 == other.0
+            }
+            #[inline]
+            fn ne(&self, other: &Self) -> bool {
+                self.0 != other.0
+            }
+        }
+
+        impl Eq for $id {}
+
+        impl PartialOrd<$id> for $id {
+            #[inline]
+            fn partial_cmp(&self, other: &Self) -> Option<crate::cmp::Ordering> {
+                use crate::cmp::Ordering;
+                if self == other {
+                    Some(Ordering::Equal)
+                } else if self.0 > other.0 {
+                    // Note:
+                    //  * false = 0_i
+                    //  * true == !0_i == -1_i
+                    Some(Ordering::Less)
+                } else {
+                    Some(Ordering::Greater)
+                }
+            }
+
+            #[inline]
+            fn lt(&self, other: &Self) -> bool {
+                self.0 > other.0
+            }
+            #[inline]
+            fn gt(&self, other: &Self) -> bool {
+                self.0 < other.0
+            }
+            #[inline]
+            fn le(&self, other: &Self) -> bool {
+                self.0 >= other.0
+            }
+            #[inline]
+            fn ge(&self, other: &Self) -> bool {
+                self.0 <= other.0
+            }
+        }
+
+        impl Ord for $id {
+            #[inline]
+            fn cmp(&self, other: &Self) -> crate::cmp::Ordering {
+                match self.partial_cmp(other) {
+                    Some(x) => x,
+                    None => unsafe { crate::hint::unreachable_unchecked() },
+                }
+            }
+        }
+
+        impl crate::hash::Hash for $id {
+            #[inline]
+            fn hash<H: crate::hash::Hasher>(&self, state: &mut H) {
+                (self.0 != 0).hash(state);
+            }
+        }
+
+        impl crate::fmt::Debug for $id {
+            #[inline]
+            fn fmt(&self, fmtter: &mut crate::fmt::Formatter<'_>) -> Result<(), crate::fmt::Error> {
+                write!(fmtter, "{}({})", stringify!($id), self.0 != 0)
+            }
+        }
+    };
+}
+
+impl_mask_ty!(m8: i8 | /// 8-bit wide mask.
+);
+impl_mask_ty!(m16: i16 | /// 16-bit wide mask.
+);
+impl_mask_ty!(m32: i32 | /// 32-bit wide mask.
+);
+impl_mask_ty!(m64: i64 | /// 64-bit wide mask.
+);
+impl_mask_ty!(m128: i128 | /// 128-bit wide mask.
+);
+impl_mask_ty!(msize: isize | /// isize-wide mask.
+);