From: Niels Möller <nisse@lysator.liu.se>
Date: Wed, 20 Oct 2004 16:28:18 +0000 (+0200)
Subject: * x86/arcfour-crypt.asm: Reduced inner loop by one instruction, by
X-Git-Tag: nettle_1.11_release_20041026~17
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=13070098a3b8bfe64b14eb8d0a005152ade10833;p=thirdparty%2Fnettle.git

* x86/arcfour-crypt.asm: Reduced inner loop by one instruction, by
precomputing the offset between src and dst.

Rev: src/nettle/x86/arcfour-crypt.asm:1.9
---

diff --git a/x86/arcfour-crypt.asm b/x86/arcfour-crypt.asm
index 7056c50b..43e4f7d3 100644
--- a/x86/arcfour-crypt.asm
+++ b/x86/arcfour-crypt.asm
@@ -59,6 +59,7 @@ C Register usage:
 	
 	movzbl  256(%ebp), %eax		C  i
 	movzbl  257(%ebp), %ebx		C  j
+	subl	%esi, %edi
 .Lloop:
 C	incb	%al
 	incl	%eax
@@ -75,9 +76,8 @@ C	addb    %cl, %bl
 					C  for indexing.
 	movb    (%ebp, %ecx), %cl
 	xorb    (%esi), %cl
+	movb    %cl, (%esi,%edi)
 	incl    %esi
-	movb    %cl, (%edi)
-	incl    %edi
 	cmpl	%esi, %edx
 	jne	.Lloop