From 48b7cc49a373336d8e7ac8b1c9775abc5ea1eb6d Mon Sep 17 00:00:00 2001
From: Squirrel <gilescope@gmail.com>
Date: Tue, 18 May 2021 18:22:04 +0100
Subject: [PATCH] Update library/core/src/num/mod.rs

Co-authored-by: LingMan <LingMan@users.noreply.github.com>
---
 library/core/src/num/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/core/src/num/mod.rs b/library/core/src/num/mod.rs
index 19419334839..a833f4025c2 100644
--- a/library/core/src/num/mod.rs
+++ b/library/core/src/num/mod.rs
@@ -1094,8 +1094,8 @@ fn from_str_radix<T: FromStrRadixHelper>(src: &str, radix: u32) -> Result<T, Par
 
         for &c in digits {
             // When `radix` is passed in as a literal, rather than doing a slow `imul`
-            // then the compiler can use a shift if `radix` is a power of 2.
-            // (*10 can also be turned into *8 + *2).
+            // the compiler can use shifts if `radix` can be expressed as a
+            // sum of powers of 2 (x*10 can be written as x*8 + x*2).
             // When the compiler can't use these optimisations,
             // there is a latency of several cycles so doing the
             // multiply before we need to use the result helps.