(aes_encrypt): Deleted xchgl instruction in final round, by

reordering the second and fourth round.

Rev: src/nettle/x86/aes-encrypt.asm:1.6

diff --git a/x86/aes-encrypt.asm b/x86/aes-encrypt.asm
index fddf0a167dd98570233416ad8f419c23181f7aff..a76ec156394fd8cf86b5b87584199c5073f2877b 100644 (file)
--- a/x86/aes-encrypt.asm
+++ b/x86/aes-encrypt.asm
@@ -187,7 +187,7 @@ C .Laes_got_t:
        pushl   %edi
 
        C second column
-       AES_LAST_ROUND(d,a,b,c)
+       AES_LAST_ROUND(b,c,d,a)
        pushl   %edi
 
        C third column
@@ -195,13 +195,12 @@ C .Laes_got_t:
        pushl   %edi
 
        C fourth column
-       AES_LAST_ROUND(b,c,d,a)
+       AES_LAST_ROUND(d,a,b,c)
        movl    %edi,%edx
        
        popl    %ecx
        popl    %ebx
        popl    %eax
-       xchgl   %ebx,%edx
 
        C // S-box substitution
        mov     $4,%edi