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Dmitry Baryshkov
nettle
Commits
226c885c
Commit
226c885c
authored
Jun 29, 2011
by
Niels Möller
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Rev: nettle/x86_64/serpent-decrypt.asm:1.1
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226c885c
C
nettle
,
low
-
level
cryptographics
library
C
C
Copyright
(
C
)
2011
Niels
M
ö
ller
C
C
The
nettle
library
is
free
software
; you can redistribute it and/or modify
C
it
under
the
terms
of
the
GNU
Lesser
General
Public
License
as
published
by
C
the
Free
Software
Foundation
; either version 2.1 of the License, or (at your
C
option
)
any
later
version.
C
C
The
nettle
library
is
di
stributed
in
the
hope
that
it
will
be
useful
,
but
C
WITHOUT
ANY
WARRANTY
; without even the implied warranty of MERCHANTABILITY
C
or
FITNESS
FOR
A
PARTICULAR
PURPOSE.
See
the
GNU
Lesser
General
Public
C
License
for
more
details.
C
C
You
should
have
received
a
copy
of
the
GNU
Lesser
General
Public
License
C
al
ong
with
the
nettle
library
; see the file COPYING.LIB. If not, write to
C
the
Free
Software
Foundation
,
Inc.
,
59
Temple
Place
-
Suite
330
,
Boston
,
C
MA
02111
-
1307
,
USA.
C
Register
usage
:
C
Si
ngle
bl
ock
serpent
state
,
two
copies
define
(
<
x0
>
,
<%
eax
>
)
define
(
<
x1
>
,
<%
ebx
>
)
define
(
<
x2
>
,
<%
ebp
>
)
define
(
<
x3
>
,
<%
r8d
>
)
define
(
<
y0
>
,
<%
r9d
>
)
define
(
<
y1
>
,
<%
r10d
>
)
define
(
<
y2
>
,
<%
r11d
>
)
define
(
<
y3
>
,
<%
r12d
>
)
C
Quadruple
bl
ock
serpent
state
,
two
copies
define
(
<
X0
>
,
<%
xmm0
>
)
define
(
<
X1
>
,
<%
xmm1
>
)
define
(
<
X2
>
,
<%
xmm2
>
)
define
(
<
X3
>
,
<%
xmm3
>
)
define
(
<
Y0
>
,
<%
xmm4
>
)
define
(
<
Y1
>
,
<%
xmm5
>
)
define
(
<
Y2
>
,
<%
xmm6
>
)
define
(
<
Y3
>
,
<%
xmm7
>
)
define
(
<
MINUS1
>
,
<%
xmm8
>
)
define
(
<
T0
>
,
<%
xmm9
>
)
define
(
<
T1
>
,
<%
xmm10
>
)
define
(
<
T2
>
,
<%
xmm11
>
)
define
(
<
T3
>
,
<%
xmm12
>
)
C
Arguments
define
(
<
CTX
>
,
<%
rdi
>
)
define
(
<
N
>
,
<%
rsi
>
)
define
(
<
DS
T
>
,
<%
rdx
>
)
define
(
<
SRC
>
,
<%
rcx
>
)
define
(
<
CNT
>
,
<%
r13
>
)
define
(
<
TMP32
>
,
<%
r14d
>
)
C
SBOX
macros.
Inputs
$
1
-
$
4
(
destroyed
),
outputs
$
5
-
$
8
define
(
<
SBOX0I
>
,
<
mov
$
1
,
$
5
xor
$
3
,
$
5
mov
$
1
,
$
7
or
$
2
,
$
7
mov
$
3
,
$
6
xor
$
4
,
$
6
xor
$
6
,
$
7
and
$
3
,
$
6
or
$
2
,
$
3
xor
$
4
,
$
2
or
$
1
,
$
6
and
$
3
,
$
2
xor
$
2
,
$
6
or
$
7
,
$
1
xor
$
6
,
$
1
mov
$
7
,
$
2
xor
$
1
,
$
2
not
$
7
or
$
7
,
$
4
xor
$
3
,
$
4
mov
$
1
,
$
8
xor
$
4
,
$
8
or
$
4
,
$
2
xor
$
2
,
$
5
>
)
define
(
<
SBOX1I
>
,
<
mov
$
2
,
$
6
or
$
4
,
$
6
xor
$
6
,
$
3
mov
$
1
,
$
8
xor
$
2
,
$
8
mov
$
1
,
$
5
or
$
6
,
$
5
and
$
8
,
$
5
xor
$
5
,
$
2
xor
$
6
,
$
8
and
$
4
,
$
2
mov
$
1
,
$
7
and
$
3
,
$
7
or
$
7
,
$
6
or
$
4
,
$
7
xor
$
5
,
$
7
not
$
7
xor
$
2
,
$
6
xor
$
6
,
$
5
xor
$
3
,
$
5
or
$
7
,
$
1
xor
$
1
,
$
5
>
)
define
(
<
SBOX2I
>
,
<
mov
$
1
,
$
5
xor
$
4
,
$
5
mov
$
3
,
$
7
xor
$
4
,
$
7
mov
$
2
,
$
6
or
$
7
,
$
6
xor
$
6
,
$
5
mov
$
4
,
$
6
or
$
5
,
$
6
and
$
2
,
$
6
not
$
4
mov
$
1
,
$
8
or
$
3
,
$
8
and
$
8
,
$
7
xor
$
7
,
$
6
and
$
2
,
$
8
and
$
3
,
$
1
or
$
4
,
$
1
xor
$
1
,
$
8
and
$
8
,
$
3
xor
$
1
,
$
3
mov
$
5
,
$
7
xor
$
6
,
$
7
xor
$
3
,
$
7
>
)
define
(
<
SBOX3I
>
,
<
mov
$
3
,
$
8
or
$
4
,
$
8
mov
$
2
,
$
5
and
$
8
,
$
5
mov
$
1
,
$
7
or
$
4
,
$
7
mov
$
3
,
$
6
xor
$
7
,
$
6
xor
$
6
,
$
5
xor
$
1
,
$
4
xor
$
4
,
$
8
xor
$
2
,
$
7
and
$
6
,
$
7
xor
$
4
,
$
7
xor
$
1
,
$
6
or
$
5
,
$
4
and
$
4
,
$
6
xor
$
2
,
$
6
and
$
7
,
$
1
or
$
2
,
$
1
xor
$
1
,
$
8
>
)
define
(
<
SBOX4I
>
,
<
mov
$
3
,
$
6
xor
$
4
,
$
6
mov
$
3
,
$
7
or
$
4
,
$
7
xor
$
2
,
$
7
or
$
4
,
$
2
mov
$
1
,
$
5
xor
$
7
,
$
5
xor
$
7
,
$
4
and
$
1
,
$
7
xor
$
7
,
$
6
xor
$
1
,
$
7
or
$
3
,
$
7
and
$
2
,
$
1
mov
$
1
,
$
8
xor
$
4
,
$
8
not
$
1
or
$
6
,
$
1
xor
$
1
,
$
5
xor
$
2
,
$
1
xor
$
1
,
$
7
>
)
define
(
<
SBOX5I
>
,
<
mov
$
1
,
$
6
and
$
4
,
$
6
mov
$
3
,
$
8
xor
$
6
,
$
8
mov
$
2
,
$
5
and
$
8
,
$
5
mov
$
1
,
$
7
xor
$
4
,
$
7
xor
$
2
,
$
4
xor
$
7
,
$
5
and
$
1
,
$
3
and
$
5
,
$
1
or
$
2
,
$
3
xor
$
5
,
$
6
xor
$
3
,
$
6
mov
$
5
,
$
7
or
$
6
,
$
7
xor
$
8
,
$
7
xor
$
4
,
$
7
not
$
2
or
$
1
,
$
2
xor
$
2
,
$
8
>
)
define
(
<
SBOX6I
>
,
<
mov
$
1
,
$
7
xor
$
3
,
$
7
not
$
3
mov
$
2
,
$
5
xor
$
4
,
$
5
mov
$
1
,
$
6
or
$
3
,
$
6
xor
$
5
,
$
6
mov
$
2
,
$
8
and
$
7
,
$
8
or
$
4
,
$
8
or
$
3
,
$
4
or
$
2
,
$
3
and
$
1
,
$
3
mov
$
3
,
$
5
xor
$
8
,
$
5
not
$
5
and
$
7
,
$
8
xor
$
3
,
$
8
xor
$
6
,
$
1
xor
$
1
,
$
8
and
$
5
,
$
2
xor
$
2
,
$
7
xor
$
4
,
$
7
>
)
define
(
<
SBOX7I
>
,
<
mov
$
1
,
$
8
and
$
2
,
$
8
mov
$
2
,
$
7
xor
$
4
,
$
7
or
$
8
,
$
7
mov
$
1
,
$
6
or
$
4
,
$
6
and
$
4
,
$
6
xor
$
6
,
$
7
or
$
3
,
$
8
mov
$
1
,
$
5
or
$
2
,
$
5
and
$
4
,
$
5
xor
$
5
,
$
8
xor
$
2
,
$
5
mov
$
4
,
$
6
xor
$
8
,
$
6
not
$
6
or
$
5
,
$
6
xor
$
3
,
$
5
xor
$
1
,
$
6
or
$
6
,
$
4
xor
$
4
,
$
5
>
)
define
(
<
LTI
>
,
<
rol
<
$
>
10
,
$
3
rol
<
$
>
27
,
$
1
mov
$
2
,
TMP32
shl
<
$
>
7
,
TMP32
xor
$
4
,
$
3
xor
TMP32
,
$
3
xor
$
2
,
$
1
xor
$
4
,
$
1
rol
<
$
>
25
,
$
4
rol
<
$
>
31
,
$
2
mov
$
1
,
TMP32
shl
<
$
>
3
,
TMP32
xor
$
3
,
$
4
xor
TMP32
,
$
4
xor
$
1
,
$
2
xor
$
3
,
$
2
rol
<
$
>
29
,
$
3
rol
<
$
>
19
,
$
1
>
)
.file
"
serpent
-
decrypt.asm
"
C
serpent_decrypt
(
struct
serpent_context
*
ctx
,
C
unsigned
length
,
uint8_t
*
ds
t
,
C
const
uint8_t
*
src
)
.text
ALIGN
(
4
)
PROLOGUE
(
nettle_serpent_decrypt
)
C
save
al
l
registers
that
need
to
be
saved
push
%
rbx
push
%
rbp
push
%
r12
push
%
r13
push
%
r14
lea
(
SRC
,
N
),
SRC
lea
(
DS
T
,
N
),
DS
T
neg
N
jz
.Lend
.Lblock_loop:
movl
(
SRC
,
N
),
x0
movl
4
(
SRC
,
N
),
x1
movl
8
(
SRC
,
N
),
x2
movl
12
(
SRC
,
N
),
x3
movl
x0
,
(
DS
T
,
N
)
movl
x1
,
4
(
DS
T
,
N
)
movl
x2
,
8
(
DS
T
,
N
)
movl
x3
,
12
(
DS
T
,
N
)
add
$
16
,
N
jnc
.Lblock_loop
.Lend:
pop
%
r14
pop
%
r13
pop
%
r12
pop
%
rbp
pop
%
rbx
ret
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