1 files changed, 41 insertions, 0 deletions
diff --git a/library/portable-simd/crates/core_simd/src/to_bytes.rs b/library/portable-simd/crates/core_simd/src/to_bytes.rs
new file mode 100644
index 000000000..b36b1a347
--- /dev/null
+++ b/library/portable-simd/crates/core_simd/src/to_bytes.rs
@@ -0,0 +1,41 @@
+macro_rules! impl_to_bytes {
+    { $ty:ty, $size:literal } => {
+        impl<const LANES: usize> crate::simd::Simd<$ty, LANES>
+        where
+            crate::simd::LaneCount<LANES>: crate::simd::SupportedLaneCount,
+            crate::simd::LaneCount<{{ $size * LANES }}>: crate::simd::SupportedLaneCount,
+        {
+            /// Return the memory representation of this integer as a byte array in native byte
+            /// order.
+            pub fn to_ne_bytes(self) -> crate::simd::Simd<u8, {{ $size * LANES }}> {
+                // Safety: transmuting between vectors is safe
+                unsafe { core::mem::transmute_copy(&self) }
+            }
+
+            /// Create a native endian integer value from its memory representation as a byte array
+            /// in native endianness.
+            pub fn from_ne_bytes(bytes: crate::simd::Simd<u8, {{ $size * LANES }}>) -> Self {
+                // Safety: transmuting between vectors is safe
+                unsafe { core::mem::transmute_copy(&bytes) }
+            }
+        }
+    }
+}
+
+impl_to_bytes! { u8, 1 }
+impl_to_bytes! { u16, 2 }
+impl_to_bytes! { u32, 4 }
+impl_to_bytes! { u64, 8 }
+#[cfg(target_pointer_width = "32")]
+impl_to_bytes! { usize, 4 }
+#[cfg(target_pointer_width = "64")]
+impl_to_bytes! { usize, 8 }
+
+impl_to_bytes! { i8, 1 }
+impl_to_bytes! { i16, 2 }
+impl_to_bytes! { i32, 4 }
+impl_to_bytes! { i64, 8 }
+#[cfg(target_pointer_width = "32")]
+impl_to_bytes! { isize, 4 }
+#[cfg(target_pointer_width = "64")]
+impl_to_bytes! { isize, 8 }