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Wim Lewis
nettle
Commits
a6451ce5
Commit
a6451ce5
authored
Mar 01, 2013
by
Niels Möller
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ARM assembly for ecc_224_modp.
parent
eb046c27
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129 additions
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ChangeLog
ChangeLog
+6
-0
armv7/ecc-224-modp.asm
armv7/ecc-224-modp.asm
+111
-0
ecc-224.c
ecc-224.c
+12
-2
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ChangeLog
View file @
a6451ce5
2013-03-01 Niels Möller <nisse@lysator.liu.se>
* ecc-224.c: Check HAVE_NATIVE_ecc_224_modp, and use native
version if available.
* armv7/ecc-224-modp.asm: New file, 4.5 time speedup over C
version.
* configure.ac (asm_optional_list): Added ecc-224-modp.asm.
(OPT_ASM_SOURCES): Fixed assignment.
...
...
armv7/ecc-224-modp.asm
0 → 100644
View file @
a6451ce5
C
nettle
,
low
-
level
cryptographics
library
C
C
Copyright
(
C
)
2013
,
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.
,
51
Franklin
Street
,
Fifth
Floor
,
Boston
,
C
MA
02111
-
1301
,
USA.
.file
"ecc-224-modp.asm"
.arm
define
(
<
RP
>
,
<
r1
>
)
define
(
<
H
>
,
<
r0
>
)
C
Overlaps
unused
ecc
argument
define
(
<
T0
>
,
<
r2
>
)
define
(
<
T1
>
,
<
r3
>
)
define
(
<
T2
>
,
<
r4
>
)
define
(
<
T3
>
,
<
r5
>
)
define
(
<
T4
>
,
<
r6
>
)
define
(
<
T5
>
,
<
r7
>
)
define
(
<
T6
>
,
<
r8
>
)
define
(
<
N3
>
,
<
r10
>
)
define
(
<
L0
>
,
<
r11
>
)
define
(
<
L1
>
,
<
r12
>
)
define
(
<
L2
>
,
<
lr
>
)
C
ecc_224_modp
(
const
struct
ecc_curve
*
ecc
,
mp_limb_t
*
rp
)
.text
.align
2
PROLOGUE
(
nettle_ecc_224_modp
)
push
{
r4
,
r5
,
r6
,
r7
,
r8
,
r10
,
r11
,
lr
}
add
L2
,
RP
,
#
28
ldm
L2
,
{
T0
,
T1
,
T2
,
T3
,
T4
,
T5
,
T6
}
mov
H
,
#
0
adds
T0
,
T0
,
T4
adcs
T1
,
T1
,
T5
adcs
T2
,
T2
,
T6
adc
H
,
H
,
#
0
C
This
switch
from
adcs
to
sbcs
takes
carry
into
account
with
C
correct
si
gn
,
but
it
al
ways
subtracts
1
too
much.
We
arrange
C
to
al
so
add
B
^
7
+
1
below
,
so
the
effect
is
adding
p.
This
C
addition
of
p
al
so
ensures
that
the
result
never
is
C
negative.
sbcs
N3
,
T3
,
T0
sbcs
T4
,
T4
,
T1
sbcs
T5
,
T5
,
T2
sbcs
T6
,
T6
,
H
mov
H
,
#
1
C
This
is
the
B
^
7
sbc
H
,
#
0
subs
T6
,
T6
,
T3
sbc
H
,
#
0
C
Now
subtract
from
low
half
ldm
RP
!
,
{
L0
,
L1
,
L2
}
C
Cl
ear
carry
,
with
the
sbcs
,
this
is
the
1
.
adds
RP
,
#
0
sbcs
T0
,
L0
,
T0
sbcs
T1
,
L1
,
T1
sbcs
T2
,
L2
,
T2
ldm
RP
!
,
{
T3
,
L0
,
L1
,
L2
}
sbcs
T3
,
T3
,
N3
sbcs
T4
,
L0
,
T4
sbcs
T5
,
L1
,
T5
sbcs
T6
,
L2
,
T6
rsc
H
,
H
,
#
0
C
Now
-
2
<
=
H
<
=
0
is
the
borrow
,
so
subtract
(
B
^
3
-
1
)
|
H
|
C
Use
(
B
^
3
-
1
)
H
=
<
H
,
H
,
H
>
if
-
1
<
=
H
<
=
0
,
and
C
(
B
^
3
-
1
)
H
=
<
1
,
B
-
1
,
B
-
1
,
B
-
2
>
if
H
=
-
2
subs
T0
,
T0
,
H
asr
L1
,
H
,
#
1
sbcs
T1
,
T1
,
L1
eor
H
,
H
,
L1
sbcs
T2
,
T2
,
L1
sbcs
T3
,
T3
,
H
sbcs
T4
,
T4
,
#
0
sbcs
T5
,
T5
,
#
0
sbcs
T6
,
T6
,
#
0
sbcs
H
,
H
,
H
C
Final
borrow
,
subtract
(
B
^
3
-
1
)
|
H
|
subs
T0
,
T0
,
H
sbcs
T1
,
T1
,
H
sbcs
T2
,
T2
,
H
sbcs
T3
,
T3
,
#
0
sbcs
T4
,
T4
,
#
0
sbcs
T5
,
T5
,
#
0
sbcs
T6
,
T6
,
#
0
stmdb
RP
,
{
T0
,
T1
,
T2
,
T3
,
T4
,
T5
,
T6
}
pop
{
r4
,
r5
,
r6
,
r7
,
r8
,
r10
,
r11
,
pc
}
EPILOGUE
(
nettle_ecc_224_modp
)
ecc-224.c
View file @
a6451ce5
...
...
@@ -30,7 +30,17 @@
#include "ecc-internal.h"
#if HAVE_NATIVE_ecc_224_modp
#define USE_REDC 0
#define ecc_224_modp nettle_ecc_224_modp
void
ecc_224_modp
(
const
struct
ecc_curve
*
ecc
,
mp_limb_t
*
rp
);
#else
#define USE_REDC (ECC_REDC_SIZE != 0)
#define ecc_224_modp ecc_generic_modp
#endif
#include "ecc-224.h"
...
...
@@ -49,9 +59,9 @@ const struct ecc_curve nettle_secp_224r1 =
ecc_q
,
ecc_g
,
ecc_redc_g
,
ecc_
generic
_modp
,
ecc_
224
_modp
,
ecc_generic_redc
,
USE_REDC
?
ecc_generic_redc
:
ecc_
generic
_modp
,
USE_REDC
?
ecc_generic_redc
:
ecc_
224
_modp
,
ecc_generic_modq
,
ecc_Bmodp
,
ecc_Bmodp_shifted
,
...
...
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