From 0ce47b3c1f200f59e5459eb50fb6c2715c3b2259 Mon Sep 17 00:00:00 2001
From: Aaron Kutch <aaronkutch@att.net>
Date: Thu, 10 Dec 2020 17:00:45 -0600
Subject: [PATCH] fix abs_diff bug

---
 library/compiler-builtins/src/int/mod.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/library/compiler-builtins/src/int/mod.rs b/library/compiler-builtins/src/int/mod.rs
index e50b2e608383..a186a95aa666 100644
--- a/library/compiler-builtins/src/int/mod.rs
+++ b/library/compiler-builtins/src/int/mod.rs
@@ -250,7 +250,11 @@ macro_rules! int_impl {
             }
 
             fn abs_diff(self, other: Self) -> Self {
-                (self.wrapping_sub(other) as $ity).wrapping_abs() as $uty
+                if self < other {
+                    other.wrapping_sub(self)
+                } else {
+                    self.wrapping_sub(other)
+                }
             }
 
             int_impl_common!($uty);