<s>
The	O
A64FX	O
is	O
a	O
64-bit	B-Device
ARM	B-Architecture
architecture	I-Architecture
microprocessor	B-Architecture
designed	O
by	O
Fujitsu	O
.	O
</s>
<s>
The	O
processor	O
is	O
replacing	O
the	O
SPARC64	B-Device
V	I-Device
as	O
Fujitsu	O
's	O
processor	O
for	O
supercomputer	B-Architecture
applications	O
.	O
</s>
<s>
It	O
powers	O
the	O
Fugaku	B-Device
supercomputer	B-Architecture
,	O
the	O
fastest	B-Operating_System
supercomputer	I-Operating_System
in	O
the	O
world	O
by	O
TOP500	B-Operating_System
rankings	O
as	O
of	O
June	O
2020	O
as	O
well	O
as	O
November	O
2020	O
,	O
June	O
2021	O
and	O
November	O
2021	O
.	O
</s>
<s>
Fujitsu	O
collaborated	O
with	O
ARM	B-Architecture
to	O
develop	O
the	O
processor	O
;	O
it	O
is	O
the	O
first	O
processor	O
to	O
use	O
the	O
ARMv8.2-A	O
Scalable	O
Vector	O
Extension	O
SIMD	O
instruction	O
set	O
with	O
512-bit	O
vector	O
implementation	O
.	O
</s>
<s>
MOVPRFX	O
instruction	O
followed	O
by	O
3-operand	O
FMA	O
operation	O
(	O
ARM	B-Architecture
,	O
like	O
RISC	B-Architecture
in	O
general	O
,	O
is	O
a	O
3-operand	O
machine	O
,	O
with	O
no	O
space	O
for	O
four	O
operands	O
)	O
,	O
which	O
get	O
packed	O
into	O
a	O
single	O
operation	O
in	O
the	O
pipeline	O
.	O
</s>
<s>
GPUs	B-Architecture
and	O
FPGAs	B-Architecture
)	O
.	O
</s>
<s>
Reliability	B-General_Concept
,	I-General_Concept
availability	I-General_Concept
and	I-General_Concept
serviceability	I-General_Concept
(	O
RAS	O
)	O
capabilities	O
are	O
claimed	O
,	O
i.e.	O
</s>
<s>
In	O
June	O
2020	O
the	O
Fugaku	B-Device
supercomputer	B-Architecture
using	O
this	O
processor	O
reached	O
442	O
petaFLOPS	O
and	O
became	O
the	O
fastest	B-Operating_System
supercomputer	I-Operating_System
in	O
the	O
world	O
.	O
</s>
<s>
Fujitsu	O
designed	O
the	O
A64FX	O
for	O
the	O
Fugaku	B-Device
.	O
</s>
<s>
As	O
of	O
June	O
and	O
November	O
2020	O
,	O
the	O
Fugaku	B-Device
is	O
the	O
fastest	B-Operating_System
supercomputer	I-Operating_System
in	O
the	O
world	O
by	O
TOP500	B-Operating_System
rankings	O
.	O
</s>
<s>
Cray	O
is	O
developing	O
supercomputers	B-Architecture
using	O
the	O
A64FX	O
.	O
</s>
<s>
The	O
supercomputer	B-Architecture
is	O
being	O
built	O
for	O
a	O
consortium	O
in	O
the	O
United	O
Kingdom	O
,	O
led	O
by	O
the	O
University	O
of	O
Bristol	O
and	O
also	O
including	O
the	O
Met	O
Office	O
,	O
using	O
the	O
Fujitsu	O
processors	O
.	O
</s>
<s>
It	O
is	O
an	O
upgrade	O
to	O
the	O
Isambard	O
supercomputer	B-Architecture
which	O
was	O
built	O
with	O
the	O
Marvell	O
ThunderX2	O
,	O
another	O
ARM	B-Architecture
architecture	I-Architecture
microprocessor	B-Architecture
.	O
</s>
