<s>
is	O
an	O
open-source	B-Application
framework	O
for	O
implementing	O
a	O
superset	O
of	O
BLAS	B-Application
(	O
Basic	B-Application
Linear	I-Application
Algebra	I-Application
Subprograms	I-Application
)	O
functionality	O
for	O
specific	O
processor	B-General_Concept
types	O
that	O
was	O
recently	O
awarded	O
the	O
J	O
.	O
H	O
.	O
Wilkinson	O
Prize	O
for	O
Numerical	O
Software	O
.	O
</s>
<s>
It	O
exposes	O
that	O
functionality	O
through	O
two	O
traditional	O
Application	B-Application
Programming	I-Application
Interfaces	I-Application
(	O
APIs	B-Application
)	O
:	O
the	O
BLAS	B-Application
interface	O
and	O
the	O
CBLAS	B-Application
interface	O
.	O
</s>
<s>
BLIS	B-Application
also	O
includes	O
two	O
APIs	B-Application
native	O
to	O
the	O
framework	O
:	O
a	O
typed	O
(	O
BLAS-like	O
)	O
API	B-Application
and	O
an	O
object	O
API	B-Application
.	O
</s>
<s>
These	O
native	O
interfaces	O
provide	O
access	O
to	O
BLAS-like	O
functionality	O
that	O
is	O
not	O
supported	O
by	O
,	O
but	O
closely	O
related	O
to	O
,	O
operations	O
found	O
in	O
the	O
BLAS	B-Application
(	O
and	O
CBLAS	B-Application
)	O
.	O
</s>
<s>
BLIS	B-Application
yields	O
high	O
performance	O
on	O
many	O
current	O
CPU	O
microarchitectures	O
in	O
both	O
single-threaded	O
and	O
multithreaded	O
modes	O
of	O
execution	O
.	O
</s>
<s>
BLIS	B-Application
also	O
offers	O
competitive	O
performance	O
for	O
some	O
cases	O
of	O
matrix	O
multiplication	O
in	O
which	O
one	O
or	O
more	O
matrix	O
operands	O
are	O
unusually	O
skinny	O
and/or	O
small	O
.	O
</s>
<s>
BLIS	B-Application
also	O
works	O
on	O
processors	O
for	O
which	O
custom	O
kernels	O
have	O
not	O
yet	O
been	O
written	O
;	O
in	O
those	O
cases	O
,	O
the	O
framework	O
relies	O
upon	O
portable	O
kernel	O
implementations	O
that	O
perform	O
at	O
a	O
lower	O
rate	O
of	O
computation	O
.	O
</s>
<s>
BLIS	B-Application
is	O
sometimes	O
described	O
as	O
a	O
refactoring	O
of	O
GotoBLAS2	O
,	O
which	O
was	O
created	O
by	O
Kazushige	O
Goto	O
at	O
the	O
Texas	O
Advanced	O
Computing	O
Center	O
.	O
</s>
