diff --git a/src/machine.rs b/src/machine.rs
index 480156b045..fc936fa8b1 100644
--- a/src/machine.rs
+++ b/src/machine.rs
@@ -320,19 +320,20 @@ impl Mappings {
         self.v.iter()
     }
 
+    fn binary_search(&self, addr: Size) -> Result<usize, usize> {
+        self.v.binary_search_by(|map| {
+            if map.range.start > addr {
+                Ordering::Greater
+            } else if map.range.end < addr {
+                Ordering::Less
+            } else {
+                Ordering::Equal
+            }
+        })
+    }
+
     pub fn insert(&mut self, new: Mapping) {
-        let idx = self
-            .v
-            .binary_search_by(|map| {
-                if map.range.start > new.range.start {
-                    Ordering::Greater
-                } else if map.range.end < new.range.start {
-                    Ordering::Less
-                } else {
-                    Ordering::Equal
-                }
-            })
-            .unwrap_err();
+        let idx = self.binary_search(new.range.start).unwrap_err();
         self.v.insert(idx, new);
     }
 
@@ -340,18 +341,7 @@ impl Mappings {
         if !self.v.get(0)?.contains(addr) && !self.v.last()?.contains(addr) {
             return None;
         }
-        let idx = self
-            .v
-            .binary_search_by(|map| {
-                if map.range.start > addr {
-                    Ordering::Greater
-                } else if map.range.end < addr {
-                    Ordering::Less
-                } else {
-                    Ordering::Equal
-                }
-            })
-            .ok()?;
+        let idx = self.binary_search(addr).ok()?;
         Some(self.v.remove(idx))
     }
 
@@ -359,18 +349,7 @@ impl Mappings {
         if !self.v.get(0)?.contains(addr) && !self.v.last()?.contains(addr) {
             return None;
         }
-        let idx = self
-            .v
-            .binary_search_by(|map| {
-                if map.range.start > addr {
-                    Ordering::Greater
-                } else if map.range.end < addr {
-                    Ordering::Less
-                } else {
-                    Ordering::Equal
-                }
-            })
-            .ok()?;
+        let idx = self.binary_search(addr).ok()?;
         self.v.get(idx)
     }
 }