From: Andy Polyakov <appro@openssl.org>
Date: Tue, 20 Mar 2007 09:13:07 +0000 (+0000)
Subject: Two extra instructions in RC4 character loop give 80% performance
X-Git-Tag: OpenSSL_0_9_8k^2~937
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=de50494505b53b32a0b127525b18e259ee0f9033;p=oweals%2Fopenssl.git

Two extra instructions in RC4 character loop give 80% performance
improvement on Core2. I still need to detect Core2 and choose this
path...
---

diff --git a/crypto/rc4/asm/rc4-x86_64.pl b/crypto/rc4/asm/rc4-x86_64.pl
index 4b990cba07..5236afec12 100755
--- a/crypto/rc4/asm/rc4-x86_64.pl
+++ b/crypto/rc4/asm/rc4-x86_64.pl
@@ -221,6 +221,8 @@ $code.=<<___;
 	movb	$TY#b,($dat,$XX[0])
 	add	$TX[0]#b,$TY#b
 	add	\$1,$XX[0]#b
+	movzb	$TY#b,$TY#d
+	movzb	$XX[0]#b,$XX[0]#d
 	movzb	($dat,$TY),$TY#d
 	movzb	($dat,$XX[0]),$TX[0]#d
 	xorb	($inp),$TY#b