From 57aae75ce39de12f1af8d33d2836db59f7269ed2 Mon Sep 17 00:00:00 2001
From: Trevor Spiteri <tspiteri@ieee.org>
Date: Fri, 11 Oct 2019 17:13:19 +0200
Subject: [PATCH] improve performance of signed saturating_mul

Reciprocal throughput is improved from 2.3 to 1.7.
https://godbolt.org/z/ROMiX6
---
 src/libcore/num/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index ebde82de83457..998c8f8165204 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -1058,7 +1058,7 @@ $EndFeature, "
             #[inline]
             pub fn saturating_mul(self, rhs: Self) -> Self {
                 self.checked_mul(rhs).unwrap_or_else(|| {
-                    if (self < 0 && rhs < 0) || (self > 0 && rhs > 0) {
+                    if (self < 0) == (rhs < 0) {
                         Self::max_value()
                     } else {
                         Self::min_value()