From: Niels Möller <nisse@lysator.liu.se>
Date: Wed, 15 May 2002 14:18:41 +0000 (+0200)
Subject: (aes_decrypt): Got rid if the xchgl instruction after the final
X-Git-Tag: nettle_1.6_release_20021003~143
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3f79e3c021c4ca74d3b2156a5435e1d1dc31f98e;p=thirdparty%2Fnettle.git

(aes_decrypt): Got rid if the xchgl instruction after the final
round, folding it into the final round.

Rev: src/nettle/x86/aes-decrypt.asm:1.15
---

diff --git a/x86/aes-decrypt.asm b/x86/aes-decrypt.asm
index 09eba870..85c08413 100644
--- a/x86/aes-decrypt.asm
+++ b/x86/aes-decrypt.asm
@@ -87,19 +87,18 @@ aes_decrypt:
 	AES_FINAL_ROUND(a,d,c,b)
 	pushl	%edi
 
-	AES_FINAL_ROUND(d,c,b,a)
+	AES_FINAL_ROUND(b,a,d,c)
 	pushl	%edi
 
 	AES_FINAL_ROUND(c,b,a,d)
 	pushl	%edi
 
-	AES_FINAL_ROUND(b,a,d,c)
+	AES_FINAL_ROUND(d,c,b,a)
 	
 	movl	%edi,%edx
 	popl	%ecx
 	popl	%ebx
 	popl	%eax
-	xchgl	%ebx,%edx
 
 	C inverse S-box substitution
 	mov	$4,%edi