<s>
eSi-RISC	B-Architecture
is	O
a	O
configurable	O
CPU	B-Device
architecture	O
.	O
</s>
<s>
The	O
eSi-1600	O
and	O
eSi-1650	O
feature	O
a	O
16-bit	B-Device
data-path	O
,	O
while	O
the	O
eSi-32x0s	O
feature	O
32-bit	O
data-paths	O
,	O
and	O
the	O
eSi-3264	O
features	O
a	O
mixed	O
32/64	O
-bit	O
datapath	O
.	O
</s>
<s>
Each	O
of	O
these	O
processors	O
is	O
licensed	O
as	O
soft	O
IP	B-Architecture
cores	I-Architecture
,	O
suitable	O
for	O
integrating	O
into	O
both	O
ASICs	O
and	O
FPGAs	B-Architecture
.	O
</s>
<s>
The	O
main	O
features	O
of	O
the	O
eSi-RISC	B-Architecture
architecture	O
are	O
:	O
</s>
<s>
RISC-like	O
load/store	O
architecture	O
.	O
</s>
<s>
Configurable	O
16-bit	B-Device
,	O
32-bit	O
or	O
32/64	O
-bit	O
data-path	O
.	O
</s>
<s>
SIMD	B-Device
operations	O
.	O
</s>
<s>
Optional	O
MMU	B-General_Concept
supporting	O
both	O
memory	O
protection	O
and	O
dynamic	O
address	O
translation	O
.	O
</s>
<s>
AMBA	B-Architecture
AXI	O
,	O
AHB	O
and	O
APB	O
bus	O
interfaces	O
.	O
</s>
<s>
While	O
there	O
are	O
many	O
different	O
16	O
or	O
32-bit	O
Soft	B-Device
microprocessor	I-Device
IP	B-Architecture
cores	I-Architecture
available	O
,	O
eSi-RISC	B-Architecture
is	O
the	O
only	O
architecture	O
licensed	O
as	O
an	O
IP	B-Architecture
core	I-Architecture
that	O
has	O
both	O
16	O
and	O
32-bit	O
implementations	O
.	O
</s>
<s>
Unlike	O
in	O
other	O
RISC	B-Architecture
architectures	I-Architecture
supporting	O
both	O
16	O
and	O
32-bit	O
instructions	O
,	O
such	O
as	O
ARM/Thumb	O
or	O
MIPS/MIPS	O
-16	O
,	O
16	O
and	O
32-bit	O
instructions	O
in	O
the	O
eSi-RISC	B-Architecture
architecture	O
can	O
be	O
freely	O
intermixed	O
,	O
rather	O
than	O
having	O
different	O
modes	O
where	O
either	O
all	O
16-bit	B-Device
instructions	O
or	O
all	O
32-bit	O
instructions	O
are	O
executed	O
.	O
</s>
<s>
The	O
16-bit	B-Device
instructions	O
support	O
two	O
register	O
operands	O
in	O
the	O
lower	O
16	O
registers	O
,	O
whereas	O
the	O
32-bit	O
instructions	O
support	O
three	O
register	O
operands	O
and	O
access	O
to	O
all	O
32	O
registers	O
.	O
</s>
<s>
eSi-RISC	B-Architecture
includes	O
support	O
for	O
Multiprocessing	B-Operating_System
.	O
</s>
<s>
The	O
eSi-RISC	B-Architecture
toolchain	O
is	O
based	O
on	O
combination	O
of	O
a	O
port	O
of	O
the	O
GNU	B-Application
toolchain	I-Application
and	O
the	O
Eclipse	B-Application
IDE	I-Application
.	O
</s>
<s>
GCC	B-Application
–	O
C/C	O
++	O
compiler	O
.	O
</s>
<s>
Binutils	B-Application
–	O
Assembler	O
,	O
linker	O
and	O
binary	O
utilities	O
.	O
</s>
<s>
GDB	B-Language
–	O
Debugger	O
.	O
</s>
<s>
Eclipse	B-Application
–	O
Integrated	B-Application
Development	I-Application
Environment	I-Application
.	O
</s>
<s>
The	O
C	O
library	O
is	O
Newlib	B-Language
and	O
the	O
C++	O
library	O
is	O
Libstdc++	B-Language
.	O
</s>
