From: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Thu, 15 Mar 2018 02:36:21 +0000 (+0530)
Subject: aarch64/strncmp: Use lsr instead of mov+lsr
X-Git-Tag: glibc-2.28~472
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b47c3e7637efb77818cbef55dcd0ed1f0ea0ddf1;p=thirdparty%2Fglibc.git

aarch64/strncmp: Use lsr instead of mov+lsr

A lsr can do what the mov and lsr did.
---

diff --git a/ChangeLog b/ChangeLog
index 88566d020b3..38154c20ab7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-03-15  Siddhesh Poyarekar  <siddhesh@sourceware.org>
+
+	* sysdeps/aarch64/strncmp.S (strncmp): Use lsr instead of
+	mov + lsr.
+
 2018-03-15  Rafal Luzynski  <digitalfreak@lingonborough.com>
 
 	[BZ #22963]
diff --git a/sysdeps/aarch64/strncmp.S b/sysdeps/aarch64/strncmp.S
index 1dc8b79a223..759c752fc2d 100644
--- a/sysdeps/aarch64/strncmp.S
+++ b/sysdeps/aarch64/strncmp.S
@@ -208,15 +208,13 @@ L(done):
 	/* Align the SRC1 to a dword by doing a bytewise compare and then do
 	   the dword loop.  */
 L(try_misaligned_words):
-	mov	limit_wd, limit
-	lsr	limit_wd, limit_wd, #3
+	lsr	limit_wd, limit, #3
 	cbz	count, L(do_misaligned)
 
 	neg	count, count
 	and	count, count, #7
 	sub	limit, limit, count
-	mov	limit_wd, limit
-	lsr	limit_wd, limit_wd, #3
+	lsr	limit_wd, limit, #3
 
 L(page_end_loop):
 	ldrb	data1w, [src1], #1