SOFT PROCESSOR COMPARISON by pdabrows--at--uiuc.edu. Email me with corrections or updates! Updated June 8, 2007

Name

Leon3

DLX Superscalar

OpenRISC 1200

OpenSPARC T1

OpenSPARC S1

Leon2

VAMP

miniMIPS

PPC405

MicroBlaze 6.0

nnARM

blackARM

ISA

Sparc V8

DLX

32-bit RISC

Sparc V9

Sparc V9

Sparc V8

DLX

MIPS I

PPC

32-bit RISC

ARM7

ARM7TDMI

Compliant

Fully

Mostly

Fully

Fully

Fully

Fully

Mostly

Mostly

Fully

Fully

Mostly

Partially

HDL

VHDL

Behavioral VHDL

Verilog

Verilog

Verilog

VHDL

Verilog

VHDL

Verilog

Closed VHDL

Verilog

Closed VHDL

Synthesis

Y

Mostly

Y

Partially

Y

Y

Y

Y

Y

Y

Partially

Y

Issue Width

1

2

1

1 (on 1 core)

4

1

5

1

1

1

1

1

Pipeline Stages

7

4 to 7

5

6

6

5

5

5

5

5

4

?

OS/Linux

Y/2.6

N/N

Y/2.6

Y/2.6

Y/2.6

Y/2.4

N/N

N/N

Y/2.6

Y/uClinux 2.4

N/N

N/N

Compiler

GNU Tools

Closed GCC

GNU Tools

GNU Tools

GNU Tools

GNU Tools

GCC Based

Assembler

GNU Tools

GNU Tools

LibC

Y

N

Broken

Y

Y

Y

N

N

Y

Buggy

N

N

Mem Cntrl

S, SD, DDR, BRAM

S, BRAM

DDR,SD, S

DRAM

DRAM

SD, DDR, BRAM

DDR, SD, BRAM

MMU

Y

Y

Y

Y

Y

Y

Y

N

Y

N

N

N

FPU

Y

N

N

Y

Y

Y

Y

N

N

Y

N

N

MUL/DIV

Y/Y

Y/N

Y/Y

Y/Y

Y/Y

Y/Y

Y/Y

Y/N

Y/Y

Y/Y

Y/N

N/N

Debug

Y, GDB

N

Y, GDB

Y

Y

Y, GDB

Y

Y

Y

N

N

Interrupt

Y

Untested

Y

Y

Y

Y

Y

Y

Y

Y

Y

N

Interface

AMBA Bus

Memory

Wishbone

JBI

JBI

AMBA Bus

Custom

Memory

PLB

LMB, OPB

Memory

Memory

Simulator

Y

Y

Y

Y

Y

Y

Y

N

Y

Y

N

N

User Base

Huge

Small

Small

Big

Small

Huge

Small

Small

Huge

Huge

Small

Support

Active

None

Some

Active

Some

Active

None

None

Some

Active

None

None

Applications

All

None

Some

All

All

All

None

None

All

Some

None

None

License

GPL

None

LGPL

GPL

GPL

GPL

Custom

LGPL

Restricted

? Problems..

? Problems..

SoC Periph

Lots

None

Some

Some

Some

Lots

None

None

Some

Some

None

None

SMP

Y

N

N

CMP

Y

N

N

Y

N

N

Y

Tools

ISE, Synplify Pro

ISE

Synopsys Design Compiler, Synplicity Synplify Pro

ISE, Synopsis

Design Compiler, Core Consultant

XPS

Design Compiler, Aurora

Leonardo Spectrum

Config Type

GUI

Hand

GUI

GUI

GUI

Hand

Hand

Prebuilt Ex

Y

N

Y

Y

N

Y

N

N

Branch Pred

N

Y

N

N

N

Y

N

Y

N

N

Cache

Y

Y

Y

Y

Y

Y

Y

Y

Not Synth

N

TLB

Y

Y

Y

Y

N

Y

N

N

N

N

Size (LUT)

8000

>10000

5000

39000

18000

20000

900-2600

Speed

100 mhz

25 mhz

33 mhz

50 mhz

50 mhz

10 mhz

50 mhz

30 mhz

150 mhz

15 mhz

Testing

Tons

Some

Lots

Tons

Lots

Tons

Formal Proof

Some

Tons

Tons

Questionable

Questionable

Testbench

Yes

Some

Yes

Yes

Yes

Link

http://www.gaisler.com/

http://www.rs.tu-darmstadt.de/downloads/docu/dlxdocu/SuperscalarDLX.html

http://www.opencores.org/pnews.cgi/list/or1k?no_loop=yes

http://opensparc-t1.sunsource.net/

http://www.srisc.com

http://www.gaisler.com/

http://www-wjp.cs.uni-sb.de/forschung/projekte/VAMP/index_en.php

http://www.opencores.org/projects.cgi/web/minimips/overview

http://www.power.org/news/articles/405download/

http://www.xilinx.com/xlnx/xebiz/designResources/ip_product_details.jsp?key=micro_blaze