Commit 8bd45c63 authored by Niels Möller's avatar Niels Möller

(aes_decrypt): Use AES_LAST_ROUND.

Rev: src/nettle/x86/aes-decrypt.asm:1.8
parent 0610aa4b
......@@ -74,7 +74,9 @@ aes_decrypt:
popl %ecx
popl %ebx
popl %eax
popl %esi
xorl (%esi),%eax C add current session key to plaintext
xorl 4(%esi),%ebx
xorl 8(%esi),%ecx
......@@ -86,65 +88,19 @@ aes_decrypt:
C Foo?
xchgl %ebx,%edx
C // last round
C // first column
C a b c d
movl %eax,%edi
andl $0x000000ff,%edi
movl %ebx,%ebp
andl $0x0000ff00,%ebp
orl %ebp,%edi
movl %ecx,%ebp
andl $0x00ff0000,%ebp
orl %ebp,%edi
movl %edx,%ebp
andl $0xff000000,%ebp
orl %ebp,%edi
C last round
AES_LAST_ROUND(a,b,c,d)
pushl %edi
C // second column
C b c d a
movl %eax,%edi
andl $0xff000000,%edi
movl %ebx,%ebp
andl $0x000000ff,%ebp
orl %ebp,%edi
movl %ecx,%ebp
andl $0x0000ff00,%ebp
orl %ebp,%edi
movl %edx,%ebp
andl $0x00ff0000,%ebp
orl %ebp,%edi
AES_LAST_ROUND(b,c,d,a)
pushl %edi
C // third column
C c d a b
movl %eax,%edi
andl $0x00ff0000,%edi
movl %ebx,%ebp
andl $0xff000000,%ebp
orl %ebp,%edi
movl %ecx,%ebp
andl $0x000000ff,%ebp
orl %ebp,%edi
movl %edx,%ebp
andl $0x0000ff00,%ebp
orl %ebp,%edi
AES_LAST_ROUND(c,d,a,b)
pushl %edi
C // fourth column
C d a b c
movl %eax,%edi
andl $0x0000ff00,%edi
movl %ebx,%ebp
andl $0x00ff0000,%ebp
orl %ebp,%edi
movl %ecx,%ebp
andl $0xff000000,%ebp
orl %ebp,%edi
movl %edx,%ebp
andl $0x000000ff,%ebp
orl %ebp,%edi
AES_LAST_ROUND(d,a,b,c)
movl %edi,%edx
popl %ecx
popl %ebx
......
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