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G example
$v
[
8
]
= self::
$iv
[
0
]
;
$v
[
9
]
= self::
$iv
[
1
]
;
$v
[
10
]
= self::
$iv
[
2
]
;
$v
[
11
]
= self::
$iv
[
3
]
;
$v
[
12
]
= self::
xor64
(
$ctx
[
1
]
[
0
]
, self::
$iv
[
4
]
)
;
$v
[
13
]
= self::
xor64
(
$ctx
[
1
]
[
1
]
, self::
$iv
[
5
]
)
;
$v
[
14
]
= self::
xor64
(
$ctx
[
2
]
[
0
]
, self::
$iv
[
6
]
)
;
$v
[
15
]
= self::
xor64
(
$ctx
[
2
]
[
1
]
, self::
$iv
[
7
]
)
;
for
(
$r
= 0;
$r
< 12; ++
$r
)
{
$v
= self::
G
(
$r
, 0, 0, 4, 8, 12,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 1, 1, 5, 9, 13,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 2, 2, 6, 10, 14,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 3, 3, 7, 11, 15,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 4, 0, 5, 10, 15,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 5, 1, 6, 11, 12,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 6, 2, 7, 8, 13,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 7, 3, 4, 9, 14,
$v
,
$m
)
;
}
for
(
$i
= 8;
$i
--;
)
{
$ctx
[
0
]
[
$i
]
= self::
xor64
(
$v
[
8
]
= self::
$iv
[
0
]
;
$v
[
9
]
= self::
$iv
[
1
]
;
$v
[
10
]
= self::
$iv
[
2
]
;
$v
[
11
]
= self::
$iv
[
3
]
;
$v
[
12
]
= self::
xor64
(
$ctx
[
1
]
[
0
]
, self::
$iv
[
4
]
)
;
$v
[
13
]
= self::
xor64
(
$ctx
[
1
]
[
1
]
, self::
$iv
[
5
]
)
;
$v
[
14
]
= self::
xor64
(
$ctx
[
2
]
[
0
]
, self::
$iv
[
6
]
)
;
$v
[
15
]
= self::
xor64
(
$ctx
[
2
]
[
1
]
, self::
$iv
[
7
]
)
;
for
(
$r
= 0;
$r
< 12; ++
$r
)
{
$v
= self::
G
(
$r
, 0, 0, 4, 8, 12,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 1, 1, 5, 9, 13,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 2, 2, 6, 10, 14,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 3, 3, 7, 11, 15,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 4, 0, 5, 10, 15,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 5, 1, 6, 11, 12,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 6, 2, 7, 8, 13,
$v
,
$m
)
;
$v
= self::
G
(
$r
, 7, 3, 4, 9, 14,
$v
,
$m
)
;
}
for
(
$i
= 8;
$i
--;
)
{
$ctx
[
0
]
[
$i
]
= self::
xor64
(