From: Andreas Jaeger <aj@suse.de>
Date: Tue, 12 Nov 2002 17:57:51 +0000 (+0000)
Subject: Fix algorithm to align source pointer correctly.
X-Git-Tag: cvs/initial~83
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7288b24f0cbe324caf66e6b9e85b0f17042e2e8b;p=thirdparty%2Fglibc.git

Fix algorithm to align source pointer correctly.
---

diff --git a/sysdeps/x86_64/strcat.S b/sysdeps/x86_64/strcat.S
index 549fd21b4aa..e406e34b362 100644
--- a/sysdeps/x86_64/strcat.S
+++ b/sysdeps/x86_64/strcat.S
@@ -141,11 +141,13 @@ ENTRY (BP_SYM (strcat))
 2:
 	/* Second step: Copy source to destination.  */
 
-	movq	%rax, %rcx	/* duplicate  */
+	movq	%rsi, %rcx	/* duplicate  */
 	andl	$7,%ecx		/* mask alignment bits */
 	movq	%rax, %rdx	/* move around */
 	jz	22f		/* aligned => start loop */
 
+	neg	%ecx		/* align to 8 bytes.  */
+	addl	$8, %ecx
 	/* Align the source pointer.  */
 21:
 	movb	(%rsi), %al	/* Fetch a byte */