From 60147b0b08c7fab5b1bd6a300ee19c7ccc5b3001 Mon Sep 17 00:00:00 2001
From: James <james@prestwi.ch>
Date: Wed, 25 Dec 2024 08:08:46 -0700
Subject: [PATCH] opt: for little-endian targets, use as_le_bytes

---
 src/bytes.rs | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/bytes.rs b/src/bytes.rs
index 712527f..be19624 100644
--- a/src/bytes.rs
+++ b/src/bytes.rs
@@ -365,12 +365,18 @@ impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS> {
             "Buffer is too small to hold the bytes of the Uint"
         );
 
-        let chunks = buf[..Self::BYTES].chunks_mut(8);
+        #[cfg(target_endian = "little")]
+        buf[..Self::BYTES].copy_from_slice(self.as_le_slice());
 
-        self.limbs.iter().zip(chunks).for_each(|(&limb, chunk)| {
-            let le = limb.to_le_bytes();
-            chunk.copy_from_slice(&le[..chunk.len()]);
-        });
+        #[cfg(not(target_endian = "little"))]
+        {
+            let chunks = buf[..Self::BYTES].chunks_mut(8);
+
+            self.limbs.iter().zip(chunks).for_each(|(&limb, chunk)| {
+                let le = limb.to_le_bytes();
+                chunk.copy_from_slice(&le[..chunk.len()]);
+            });
+        }
 
         Self::BYTES
     }