Add opaque masks

18 files changed, 379 insertions, 146 deletions

diff --git a/crates/core_simd/src/fmt.rs b/crates/core_simd/src/fmt.rs
index c634e0546bc..07332c1ccc8 100644
--- a/crates/core_simd/src/fmt.rs
+++ b/crates/core_simd/src/fmt.rs
@@ -74,10 +74,10 @@ macro_rules! impl_fmt_trait {
 
 impl_fmt_trait! {
     integers:
-        crate::u8x8,    crate::u8x16,    crate::u8x32,    crate::u8x64,
-        crate::i8x8,    crate::i8x16,    crate::i8x32,    crate::i8x64,
-        crate::u16x4,   crate::u16x8,   crate::u16x16,   crate::u16x32,
-        crate::i16x4,   crate::i16x8,   crate::i16x16,   crate::i16x32,
+        crate::u8x8,    crate::u8x16,   crate::u8x32,   crate::u8x64,
+        crate::i8x8,    crate::i8x16,   crate::i8x32,   crate::i8x64,
+        crate::u16x4,   crate::u16x8,   crate::u16x16,  crate::u16x32,
+        crate::i16x4,   crate::i16x8,   crate::i16x16,  crate::i16x32,
         crate::u32x2,   crate::u32x4,   crate::u32x8,   crate::u32x16,
         crate::i32x2,   crate::i32x4,   crate::i32x8,   crate::i32x16,
         crate::u64x2,   crate::u64x4,   crate::u64x8,
@@ -96,10 +96,10 @@ impl_fmt_trait! {
 
 impl_fmt_trait! {
     masks:
-        crate::mask8x8,    crate::mask8x16,    crate::mask8x32,    crate::mask8x64,
-        crate::mask16x4,   crate::mask16x8,   crate::mask16x16,   crate::mask16x32,
-        crate::mask32x2,   crate::mask32x4,   crate::mask32x8,   crate::mask32x16,
-        crate::mask64x2,   crate::mask64x4,   crate::mask64x8,
-        crate::mask128x2,  crate::mask128x4,
-        crate::masksizex2, crate::masksizex4, crate::masksizex8,
+        crate::masks::wide::m8x8,    crate::masks::wide::m8x16,   crate::masks::wide::m8x32,   crate::masks::wide::m8x64,
+        crate::masks::wide::m16x4,   crate::masks::wide::m16x8,   crate::masks::wide::m16x16,  crate::masks::wide::m16x32,
+        crate::masks::wide::m32x2,   crate::masks::wide::m32x4,   crate::masks::wide::m32x8,   crate::masks::wide::m32x16,
+        crate::masks::wide::m64x2,   crate::masks::wide::m64x4,   crate::masks::wide::m64x8,
+        crate::masks::wide::m128x2,  crate::masks::wide::m128x4,
+        crate::masks::wide::msizex2, crate::masks::wide::msizex4, crate::masks::wide::msizex8,
 }
diff --git a/crates/core_simd/src/lib.rs b/crates/core_simd/src/lib.rs
index cea39e6f3f3..fd4f9dd16fd 100644
--- a/crates/core_simd/src/lib.rs
+++ b/crates/core_simd/src/lib.rs
@@ -10,8 +10,7 @@ mod fmt;
 mod intrinsics;
 mod ops;
 
-mod masks;
-pub use masks::*;
+pub mod masks;
 
 mod vectors_u8;
 pub use vectors_u8::*;
@@ -44,17 +43,4 @@ pub use vectors_f32::*;
 mod vectors_f64;
 pub use vectors_f64::*;
 
-mod vectors_mask8;
-pub use vectors_mask8::*;
-mod vectors_mask16;
-pub use vectors_mask16::*;
-mod vectors_mask32;
-pub use vectors_mask32::*;
-mod vectors_mask64;
-pub use vectors_mask64::*;
-mod vectors_mask128;
-pub use vectors_mask128::*;
-mod vectors_masksize;
-pub use vectors_masksize::*;
-
 mod round;
diff --git a/crates/core_simd/src/macros.rs b/crates/core_simd/src/macros.rs
index f37d13c3ca3..b8324ffdb92 100644
--- a/crates/core_simd/src/macros.rs
+++ b/crates/core_simd/src/macros.rs
@@ -314,7 +314,6 @@ macro_rules! define_float_vector {
     }
 }
 
-
 /// Defines an integer vector `$name` containing multiple `$lanes` of integer `$type`.
 macro_rules! define_integer_vector {
     { $(#[$attr:meta])* struct $name:ident([$type:ty; $lanes:tt]); } => {
@@ -336,6 +335,7 @@ macro_rules! define_mask_vector {
         impl $name {
             call_repeat! { $lanes => define_mask_vector [$impl_type] splat $type | }
             call_counting_args! { $lanes => define_mask_vector => new $type | }
+            call_counting_args! { $lanes => define_mask_vector => new_from_bool $type | }
         }
 
         base_vector_traits! { $name => [$type; $lanes] }
@@ -361,5 +361,14 @@ macro_rules! define_mask_vector {
         pub const fn new($($var: $type),*) -> Self {
             Self($($var.0),*)
         }
+    };
+    { new_from_bool $type:ty | $($var:ident)* } => {
+        /// Used internally (since we can't use the Into trait in `const fn`s)
+        #[allow(clippy::too_many_arguments)]
+        #[allow(unused)]
+        #[inline]
+        pub(crate) const fn new_from_bool($($var: bool),*) -> Self {
+            Self($(<$type>::new($var).0),*)
+        }
     }
 }
diff --git a/crates/core_simd/src/masks/mod.rs b/crates/core_simd/src/masks/mod.rs
new file mode 100644
index 00000000000..e138a1b4dd8
--- /dev/null
+++ b/crates/core_simd/src/masks/mod.rs
@@ -0,0 +1,215 @@
+//! Types and traits associated with masking lanes of vectors.
+
+pub mod wide;
+
+trait MaskImpl {
+    type Mask;
+}
+
+impl MaskImpl for [u8; 8] {
+    type Mask = wide::m8x8;
+}
+
+impl MaskImpl for [u8; 16] {
+    type Mask = wide::m8x16;
+}
+
+impl MaskImpl for [u8; 32] {
+    type Mask = wide::m8x32;
+}
+
+impl MaskImpl for [u8; 64] {
+    type Mask = wide::m8x64;
+}
+
+impl MaskImpl for [u16; 4] {
+    type Mask = wide::m16x4;
+}
+
+impl MaskImpl for [u16; 8] {
+    type Mask = wide::m16x8;
+}
+
+impl MaskImpl for [u16; 16] {
+    type Mask = wide::m16x16;
+}
+
+impl MaskImpl for [u16; 32] {
+    type Mask = wide::m16x32;
+}
+
+impl MaskImpl for [u32; 2] {
+    type Mask = wide::m32x2;
+}
+
+impl MaskImpl for [u32; 4] {
+    type Mask = wide::m32x4;
+}
+
+impl MaskImpl for [u32; 8] {
+    type Mask = wide::m32x8;
+}
+
+impl MaskImpl for [u32; 16] {
+    type Mask = wide::m32x16;
+}
+
+impl MaskImpl for [u64; 2] {
+    type Mask = wide::m64x2;
+}
+
+impl MaskImpl for [u64; 4] {
+    type Mask = wide::m64x4;
+}
+
+impl MaskImpl for [u64; 8] {
+    type Mask = wide::m64x8;
+}
+
+impl MaskImpl for [u128; 2] {
+    type Mask = wide::m128x2;
+}
+
+impl MaskImpl for [u128; 4] {
+    type Mask = wide::m128x4;
+}
+
+impl MaskImpl for [usize; 2] {
+    type Mask = wide::msizex2;
+}
+
+impl MaskImpl for [usize; 4] {
+    type Mask = wide::msizex4;
+}
+
+impl MaskImpl for [usize; 8] {
+    type Mask = wide::msizex8;
+}
+
+macro_rules! define_opaque_mask {
+    {
+        $(#[$attr:meta])*
+        struct $name:ident([$width:ty; $lanes:tt]);
+    } => {
+        $(#[$attr])*
+        #[allow(non_camel_case_types)]
+        pub struct $name(<[$width; $lanes] as MaskImpl>::Mask);
+
+        impl $name {
+            /// Construct a mask by setting all lanes to the given value.
+            pub fn splat(value: bool) -> Self {
+                Self(<[$width; $lanes] as MaskImpl>::Mask::splat(value.into()))
+            }
+
+            call_counting_args! { $lanes => define_opaque_mask => new [$width; $lanes] }
+        }
+    };
+    { new [$width:ty; $lanes:tt] $($var:ident)* } => {
+        /// Construct a vector by setting each lane to the given values.
+        #[allow(clippy::too_many_arguments)]
+        #[inline]
+        pub const fn new($($var: bool),*) -> Self {
+            Self(<[$width; $lanes] as MaskImpl>::Mask::new_from_bool($($var),*))
+        }
+    }
+}
+
+define_opaque_mask! {
+    /// Mask for 8 8-bit lanes
+    struct mask8x8([u8; 8]);
+}
+
+define_opaque_mask! {
+    /// Mask for 16 8-bit lanes
+    struct mask8x16([u8; 16]);
+}
+
+define_opaque_mask! {
+    /// Mask for 32 8-bit lanes
+    struct mask8x32([u8; 32]);
+}
+
+define_opaque_mask! {
+    /// Mask for 64 8-bit lanes
+    struct mask8x64([u8; 64]);
+}
+
+define_opaque_mask! {
+    /// Mask for 4 16-bit lanes
+    struct mask16x4([u16; 4]);
+}
+
+define_opaque_mask! {
+    /// Mask for 8 16-bit lanes
+    struct mask16x8([u16; 8]);
+}
+
+define_opaque_mask! {
+    /// Mask for 16 16-bit lanes
+    struct mask16x16([u16; 16]);
+}
+
+define_opaque_mask! {
+    /// Mask for 32 16-bit lanes
+    struct mask16x32([u16; 32]);
+}
+
+define_opaque_mask! {
+    /// Mask for 2 32-bit lanes
+    struct mask32x2([u32; 2]);
+}
+
+define_opaque_mask! {
+    /// Mask for 4 32-bit lanes
+    struct mask32x4([u32; 4]);
+}
+
+define_opaque_mask! {
+    /// Mask for 8 32-bit lanes
+    struct mask32x8([u32; 8]);
+}
+
+define_opaque_mask! {
+    /// Mask for 16 32-bit lanes
+    struct mask32x16([u32; 16]);
+}
+
+define_opaque_mask! {
+    /// Mask for 2 64-bit lanes
+    struct mask64x2([u64; 2]);
+}
+
+define_opaque_mask! {
+    /// Mask for 4 64-bit lanes
+    struct mask64x4([u64; 4]);
+}
+
+define_opaque_mask! {
+    /// Mask for 8 64-bit lanes
+    struct mask64x8([u64; 8]);
+}
+
+define_opaque_mask! {
+    /// Mask for 2 128-bit lanes
+    struct mask128x2([u128; 2]);
+}
+
+define_opaque_mask! {
+    /// Mask for 4 128-bit lanes
+    struct mask128x4([u128; 4]);
+}
+
+define_opaque_mask! {
+    /// Mask for 2 `isize`-wide lanes
+    struct masksizex2([usize; 2]);
+}
+
+define_opaque_mask! {
+    /// Mask for 4 `isize`-wide lanes
+    struct masksizex4([usize; 4]);
+}
+
+define_opaque_mask! {
+    /// Mask for 8 `isize`-wide lanes
+    struct masksizex8([usize; 8]);
+}
diff --git a/crates/core_simd/src/masks.rs b/crates/core_simd/src/masks/wide/mod.rs
index cba76b6a2a3..1462992197d 100644
--- a/crates/core_simd/src/masks.rs
+++ b/crates/core_simd/src/masks/wide/mod.rs
@@ -1,3 +1,18 @@
+//! Masks that take up full vector registers.
+
+mod vectors_m8;
+pub use vectors_m8::*;
+mod vectors_m16;
+pub use vectors_m16::*;
+mod vectors_m32;
+pub use vectors_m32::*;
+mod vectors_m64;
+pub use vectors_m64::*;
+mod vectors_m128;
+pub use vectors_m128::*;
+mod vectors_msize;
+pub use vectors_msize::*;
+
 /// The error type returned when converting an integer to a mask fails.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub struct TryFromMaskError(());
@@ -95,30 +110,30 @@ macro_rules! define_mask {
 
 define_mask! {
     /// 8-bit mask
-    struct mask8(i8);
+    struct m8(i8);
 }
 
 define_mask! {
     /// 16-bit mask
-    struct mask16(i16);
+    struct m16(i16);
 }
 
 define_mask! {
     /// 32-bit mask
-    struct mask32(i32);
+    struct m32(i32);
 }
 
 define_mask! {
     /// 64-bit mask
-    struct mask64(i64);
+    struct m64(i64);
 }
 
 define_mask! {
     /// 128-bit mask
-    struct mask128(i128);
+    struct m128(i128);
 }
 
 define_mask! {
     /// `isize`-wide mask
-    struct masksize(isize);
+    struct msize(isize);
 }
diff --git a/crates/core_simd/src/masks/wide/vectors_m128.rs b/crates/core_simd/src/masks/wide/vectors_m128.rs
new file mode 100644
index 00000000000..fddddac5fc4
--- /dev/null
+++ b/crates/core_simd/src/masks/wide/vectors_m128.rs
@@ -0,0 +1,11 @@
+use super::m128;
+
+define_mask_vector! {
+    /// Vector of two `m128` values
+    struct m128x2([i128 as m128; 2]);
+}
+
+define_mask_vector! {
+    /// Vector of four `m128` values
+    struct m128x4([i128 as m128; 4]);
+}
diff --git a/crates/core_simd/src/masks/wide/vectors_m16.rs b/crates/core_simd/src/masks/wide/vectors_m16.rs
new file mode 100644
index 00000000000..3b05e83f673
--- /dev/null
+++ b/crates/core_simd/src/masks/wide/vectors_m16.rs
@@ -0,0 +1,21 @@
+use super::m16;
+
+define_mask_vector! {
+    /// Vector of four `m16` values
+    struct m16x4([i16 as m16; 4]);
+}
+
+define_mask_vector! {
+    /// Vector of eight `m16` values
+    struct m16x8([i16 as m16; 8]);
+}
+
+define_mask_vector! {
+    /// Vector of 16 `m16` values
+    struct m16x16([i16 as m16; 16]);
+}
+
+define_mask_vector! {
+    /// Vector of 32 `m16` values
+    struct m16x32([i16 as m16; 32]);
+}
diff --git a/crates/core_simd/src/masks/wide/vectors_m32.rs b/crates/core_simd/src/masks/wide/vectors_m32.rs
new file mode 100644
index 00000000000..de5745fb283
--- /dev/null
+++ b/crates/core_simd/src/masks/wide/vectors_m32.rs
@@ -0,0 +1,21 @@
+use super::m32;
+
+define_mask_vector! {
+    /// Vector of two `m32` values
+    struct m32x2([i32 as m32; 2]);
+}
+
+define_mask_vector! {
+    /// Vector of four `m32` values
+    struct m32x4([i32 as m32; 4]);
+}
+
+define_mask_vector! {
+    /// Vector of eight `m32` values
+    struct m32x8([i32 as m32; 8]);
+}
+
+define_mask_vector! {
+    /// Vector of 16 `m32` values
+    struct m32x16([i32 as m32; 16]);
+}
diff --git a/crates/core_simd/src/masks/wide/vectors_m64.rs b/crates/core_simd/src/masks/wide/vectors_m64.rs
new file mode 100644
index 00000000000..55c8687fcfc
--- /dev/null
+++ b/crates/core_simd/src/masks/wide/vectors_m64.rs
@@ -0,0 +1,16 @@
+use super::m64;
+
+define_mask_vector! {
+    /// Vector of two `m64` values
+    struct m64x2([i64 as m64; 2]);
+}
+
+define_mask_vector! {
+    /// Vector of four `m64` values
+    struct m64x4([i64 as m64; 4]);
+}
+
+define_mask_vector! {
+    /// Vector of eight `m64` values
+    struct m64x8([i64 as m64; 8]);
+}
diff --git a/crates/core_simd/src/masks/wide/vectors_m8.rs b/crates/core_simd/src/masks/wide/vectors_m8.rs
new file mode 100644
index 00000000000..149e138739d
--- /dev/null
+++ b/crates/core_simd/src/masks/wide/vectors_m8.rs
@@ -0,0 +1,21 @@
+use super::m8;
+
+define_mask_vector! {
+    /// Vector of eight `m8` values
+    struct m8x8([i8 as m8; 8]);
+}
+
+define_mask_vector! {
+    /// Vector of 16 `m8` values
+    struct m8x16([i8 as m8; 16]);
+}
+
+define_mask_vector! {
+    /// Vector of 32 `m8` values
+    struct m8x32([i8 as m8; 32]);
+}
+
+define_mask_vector! {
+    /// Vector of 64 `m8` values
+    struct m8x64([i8 as m8; 64]);
+}
diff --git a/crates/core_simd/src/masks/wide/vectors_msize.rs b/crates/core_simd/src/masks/wide/vectors_msize.rs
new file mode 100644
index 00000000000..497aba8ddbb
--- /dev/null
+++ b/crates/core_simd/src/masks/wide/vectors_msize.rs
@@ -0,0 +1,16 @@
+use super::msize;
+
+define_mask_vector! {
+    /// Vector of two `msize` values
+    struct msizex2([isize as msize; 2]);
+}
+
+define_mask_vector! {
+    /// Vector of four `msize` values
+    struct msizex4([isize as msize; 4]);
+}
+
+define_mask_vector! {
+    /// Vector of eight `msize` values
+    struct msizex8([isize as msize; 8]);
+}
diff --git a/crates/core_simd/src/ops.rs b/crates/core_simd/src/ops.rs
index 5a186649821..ac89feca9d6 100644
--- a/crates/core_simd/src/ops.rs
+++ b/crates/core_simd/src/ops.rs
@@ -96,7 +96,7 @@ macro_rules! impl_ref_ops {
 }
 
 /// Implements op traits for masks
-macro_rules! impl_mask_ops {
+macro_rules! impl_mask_element_ops {
     { $($mask:ty),* } => {
         $(
             impl_ref_ops! {
@@ -161,7 +161,15 @@ macro_rules! impl_mask_ops {
         )*
     }
 }
-impl_mask_ops! { crate::mask8, crate::mask16, crate::mask32, crate::mask64, crate::mask128, crate::masksize }
+
+impl_mask_element_ops! {
+    crate::masks::wide::m8,
+    crate::masks::wide::m16,
+    crate::masks::wide::m32,
+    crate::masks::wide::m64,
+    crate::masks::wide::m128,
+    crate::masks::wide::msize
+}
 
 /// Automatically implements operators over vectors and scalars for a particular vector.
 macro_rules! impl_op {
@@ -632,10 +640,10 @@ impl_float_ops! {
 }
 
 impl_mask_ops! {
-    crate::mask8    => crate::mask8x8,    crate::mask8x16,   crate::mask8x32,   crate::mask8x64;
-    crate::mask16   => crate::mask16x4,   crate::mask16x8,   crate::mask16x16,  crate::mask16x32;
-    crate::mask32   => crate::mask32x2,   crate::mask32x4,   crate::mask32x8,   crate::mask32x16;
-    crate::mask64   => crate::mask64x2,   crate::mask64x4,   crate::mask64x8;
-    crate::mask128  => crate::mask128x2,  crate::mask128x4;
-    crate::masksize => crate::masksizex2, crate::masksizex4, crate::masksizex8;
+    crate::masks::wide::m8    => crate::masks::wide::m8x8,    crate::masks::wide::m8x16,   crate::masks::wide::m8x32,   crate::masks::wide::m8x64;
+    crate::masks::wide::m16   => crate::masks::wide::m16x4,   crate::masks::wide::m16x8,   crate::masks::wide::m16x16,  crate::masks::wide::m16x32;
+    crate::masks::wide::m32   => crate::masks::wide::m32x2,   crate::masks::wide::m32x4,   crate::masks::wide::m32x8,   crate::masks::wide::m32x16;
+    crate::masks::wide::m64   => crate::masks::wide::m64x2,   crate::masks::wide::m64x4,   crate::masks::wide::m64x8;
+    crate::masks::wide::m128  => crate::masks::wide::m128x2,  crate::masks::wide::m128x4;
+    crate::masks::wide::msize => crate::masks::wide::msizex2, crate::masks::wide::msizex4, crate::masks::wide::msizex8;
 }
diff --git a/crates/core_simd/src/vectors_mask128.rs b/crates/core_simd/src/vectors_mask128.rs
deleted file mode 100644
index adf56a3684b..00000000000
--- a/crates/core_simd/src/vectors_mask128.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-use crate::mask128;
-
-define_mask_vector! {
-    /// Vector of two `mask128` values
-    struct mask128x2([i128 as mask128; 2]);
-}
-
-define_mask_vector! {
-    /// Vector of four `mask128` values
-    struct mask128x4([i128 as mask128; 4]);
-}
diff --git a/crates/core_simd/src/vectors_mask16.rs b/crates/core_simd/src/vectors_mask16.rs
deleted file mode 100644
index 406d7255a11..00000000000
--- a/crates/core_simd/src/vectors_mask16.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-use crate::mask16;
-
-define_mask_vector! {
-    /// Vector of four `mask16` values
-    struct mask16x4([i16 as mask16; 4]);
-}
-
-define_mask_vector! {
-    /// Vector of eight `mask16` values
-    struct mask16x8([i16 as mask16; 8]);
-}
-
-define_mask_vector! {
-    /// Vector of 16 `mask16` values
-    struct mask16x16([i16 as mask16; 16]);
-}
-
-define_mask_vector! {
-    /// Vector of 32 `mask16` values
-    struct mask16x32([i16 as mask16; 32]);
-}
diff --git a/crates/core_simd/src/vectors_mask32.rs b/crates/core_simd/src/vectors_mask32.rs
deleted file mode 100644
index fad191421f3..00000000000
--- a/crates/core_simd/src/vectors_mask32.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-use crate::mask32;
-
-define_mask_vector! {
-    /// Vector of two `mask32` values
-    struct mask32x2([i32 as mask32; 2]);
-}
-
-define_mask_vector! {
-    /// Vector of four `mask32` values
-    struct mask32x4([i32 as mask32; 4]);
-}
-
-define_mask_vector! {
-    /// Vector of eight `mask32` values
-    struct mask32x8([i32 as mask32; 8]);
-}
-
-define_mask_vector! {
-    /// Vector of 16 `mask32` values
-    struct mask32x16([i32 as mask32; 16]);
-}
diff --git a/crates/core_simd/src/vectors_mask64.rs b/crates/core_simd/src/vectors_mask64.rs
deleted file mode 100644
index 554e731ccf2..00000000000
--- a/crates/core_simd/src/vectors_mask64.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-use crate::mask64;
-
-define_mask_vector! {
-    /// Vector of two `mask64` values
-    struct mask64x2([i64 as mask64; 2]);
-}
-
-define_mask_vector! {
-    /// Vector of four `mask64` values
-    struct mask64x4([i64 as mask64; 4]);
-}
-
-define_mask_vector! {
-    /// Vector of eight `mask64` values
-    struct mask64x8([i64 as mask64; 8]);
-}
diff --git a/crates/core_simd/src/vectors_mask8.rs b/crates/core_simd/src/vectors_mask8.rs
deleted file mode 100644
index d038b336104..00000000000
--- a/crates/core_simd/src/vectors_mask8.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-use crate::mask8;
-
-define_mask_vector! {
-    /// Vector of eight `mask8` values
-    struct mask8x8([i8 as mask8; 8]);
-}
-
-define_mask_vector! {
-    /// Vector of 16 `mask8` values
-    struct mask8x16([i8 as mask8; 16]);
-}
-
-define_mask_vector! {
-    /// Vector of 32 `mask8` values
-    struct mask8x32([i8 as mask8; 32]);
-}
-
-define_mask_vector! {
-    /// Vector of 64 `mask8` values
-    struct mask8x64([i8 as mask8; 64]);
-}
diff --git a/crates/core_simd/src/vectors_masksize.rs b/crates/core_simd/src/vectors_masksize.rs
deleted file mode 100644
index a838aee5198..00000000000
--- a/crates/core_simd/src/vectors_masksize.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-use crate::masksize;
-
-define_mask_vector! {
-    /// Vector of two `masksize` values
-    struct masksizex2([isize as masksize; 2]);
-}
-
-define_mask_vector! {
-    /// Vector of four `masksize` values
-    struct masksizex4([isize as masksize; 4]);
-}
-
-define_mask_vector! {
-    /// Vector of eight `masksize` values
-    struct masksizex8([isize as masksize; 8]);
-}