From 9388df97601d4906b0217eb9276f8a8730fd80bd Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Fri, 17 Apr 2020 18:23:44 +0200
Subject: [PATCH] bpo-40302: Optimize UTF-32 encoder SWAB4()

Use a | b instead of a + b in  UCS-2 implementation of SWAB4().
---
 Objects/stringlib/codecs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Objects/stringlib/codecs.h b/Objects/stringlib/codecs.h
index 208e8fe4a48bb0..9b2a29ba3b8c2a 100644
--- a/Objects/stringlib/codecs.h
+++ b/Objects/stringlib/codecs.h
@@ -743,7 +743,7 @@ STRINGLIB(SWAB4)(STRINGLIB_CHAR ch)
     return (word << 24);
 #elif STRINGLIB_SIZEOF_CHAR == 2
     /* high bytes are zero */
-    return ((word & 0x00FFu) << 24) + ((word & 0xFF00u) << 8);
+    return ((word & 0x00FFu) << 24) | ((word & 0xFF00u) << 8);
 #else
     return _Py_bswap32(word);
 #endif