From 90a823ed9261212bea6160593fb2c7472be30db4 Mon Sep 17 00:00:00 2001
From: alc <alc@FreeBSD.org>
Date: Thu, 7 Apr 2005 05:46:46 +0000
Subject: Eliminate an unneeded instruction that is a vestige of mechanical
translation from i386.
---
lib/libc/amd64/string/bzero.S | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
(limited to 'lib/libc/amd64/string')
diff --git a/lib/libc/amd64/string/bzero.S b/lib/libc/amd64/string/bzero.S
index 2f4ced3..d9d2a45 100644
--- a/lib/libc/amd64/string/bzero.S
+++ b/lib/libc/amd64/string/bzero.S
@@ -12,8 +12,6 @@ __FBSDID("$FreeBSD$");
#endif
ENTRY(bzero)
- movq %rsi,%rdx
-
cld /* set fill direction forward */
xorq %rax,%rax /* set fill data to 0 */
@@ -22,23 +20,23 @@ ENTRY(bzero)
* of aligning to word boundries, etc. So we jump to a plain
* unaligned set.
*/
- cmpq $16,%rdx
+ cmpq $16,%rsi
jb L1
movq %rdi,%rcx /* compute misalignment */
negq %rcx
andq $7,%rcx
- subq %rcx,%rdx
+ subq %rcx,%rsi
rep /* zero until word aligned */
stosb
- movq %rdx,%rcx /* zero by words */
+ movq %rsi,%rcx /* zero by words */
shrq $3,%rcx
- andq $7,%rdx
+ andq $7,%rsi
rep
stosq
-L1: movq %rdx,%rcx /* zero remainder by bytes */
+L1: movq %rsi,%rcx /* zero remainder by bytes */
rep
stosb
--
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