1 files changed, 39 insertions, 0 deletions
diff --git a/library/portable-simd/crates/core_simd/src/fmt.rs b/library/portable-simd/crates/core_simd/src/fmt.rs
new file mode 100644
index 000000000..dbd9839c4
--- /dev/null
+++ b/library/portable-simd/crates/core_simd/src/fmt.rs
@@ -0,0 +1,39 @@
+use crate::simd::{LaneCount, Simd, SimdElement, SupportedLaneCount};
+use core::fmt;
+
+macro_rules! impl_fmt_trait {
+    { $($trait:ident,)* } => {
+        $(
+            impl<T, const LANES: usize> fmt::$trait for Simd<T, LANES>
+            where
+                LaneCount<LANES>: SupportedLaneCount,
+                T: SimdElement + fmt::$trait,
+            {
+                fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                    #[repr(transparent)]
+                    struct Wrapper<'a, T: fmt::$trait>(&'a T);
+
+                    impl<T: fmt::$trait> fmt::Debug for Wrapper<'_, T> {
+                        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                            self.0.fmt(f)
+                        }
+                    }
+
+                    f.debug_list()
+                        .entries(self.as_array().iter().map(|x| Wrapper(x)))
+                        .finish()
+                }
+            }
+        )*
+    }
+}
+
+impl_fmt_trait! {
+    Debug,
+    Binary,
+    LowerExp,
+    UpperExp,
+    Octal,
+    LowerHex,
+    UpperHex,
+}