Add arithmetic function abs_diff

akubera · Nov 9, 2024 · 9ed0395 · 9ed0395
1 parent eb77071
commit 9ed0395
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diff --git a/build.rs b/build.rs
@@ -15,6 +15,9 @@ fn main() {
     let ac = autocfg::new();
     ac.emit_rustc_version(1, 70);
 
+    // abs_diff
+    ac.emit_rustc_version(1, 60);
+
     // slice::fill
     ac.emit_rustc_version(1, 50);
 

diff --git a/src/arithmetic/mod.rs b/src/arithmetic/mod.rs
@@ -136,6 +136,19 @@ pub(crate) fn diff_usize(a: usize, b: usize) -> (Ordering, usize) {
     }
 }
 
+/// Return absolute difference between two numbers
+#[cfg(rustc_1_60)]
+#[allow(clippy::incompatible_msrv)]
+#[allow(dead_code)]
+pub(crate) fn abs_diff(x: i64, y: i64) -> u64 {
+    x.abs_diff(y)
+}
+
+#[cfg(not(rustc_1_60))]
+pub(crate) fn abs_diff(x: i64, y: i64) -> u64 {
+    (x as i128 - y as i128).to_u64().unwrap_or(0)
+}
+
 
 /// Add carry to given number, returning trimmed value and storing overflow back in carry
 ///