DFPSQRT - Digital Core Design

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are trademarks of their respective owners. http://www.dcd.pl

http://www.DigitalCoreDesign.com

VHDL & VERILOG test bench environ-

ment

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Floating Point Pipelined Square Root Unit

ver 2.90

OVERVIEW

The DFPSQRT uses the pipelined mathe-

matics algorithm to compute square root

function. The input number format is accord-

ing to IEEE-754 standard. DFPSQRT sup-

ports single precision real numbers. SQRT

operation can be pipelined up to 9 levels.

Input data are fed every clock cycle. The first

result appears after 9 clock periods latency

and next results are available each clock

cycle. Precision and accuracy are parameter-

ized.

APPLICATION

Math coprocessors

DSP algorithms

Embedded arithmetic coprocessor

Data processing & control

KEY FEATURES

Full IEEE-754 compliance

Single precision real format support

Simple interface

No programming required

9 levels pipelining

24-bit accuracy, 6 fractional decimal digits

Results available at every clock

Fully configurable

Fully synthesizable, static synchronous

design with no internal tri-states

DELIVERABLES

Source code:

VHDL Source Code or/and

VERILOG Source Code or/and

Encrypted, or plain text EDIF netlist

Active-HDL automatic simulation mac-

ros

ModelSim automatic simulation macros

NCSim automatic simulation macros

Tests with reference responses

Technical documentation

Installation notes

HDL core specification

Datasheet

Synthesis scripts

Example application

Technical support

IP Core implementation support

3 months maintenance

● Delivery the IP Core updates, minor

and major versions changes

● Delivery the documentation updates

● Phone & email support

LICENSING

Comprehensible and clearly defined licensing

methods without royalty fees make using of

IP Core easy and simply.

Single Design license allows using IP Core in

single FPGA bitstream and ASIC implemen-

All trademarks mentioned in this document

are trademarks of their respective owners.

http://www.DigitalCoreDesign.com

http://www.dcd.pl

tation. It also permits FPGA prototyping be-

fore ASIC production.

Unlimited Designs license allows using IP

Core in unlimited number of FPGA bitstreams

and ASIC implementations.

In all cases number of IP Core instantiations

within a design, and number of manufactured

chips are unlimited. There is no time of use

limitations.

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Single Design license for

VHDL, Verilog source code called HDL

Source

Encrypted, or plain text EDIF called Netlist ○

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Unlimited Designs license for

HDL Source

Netlist

Upgrade from

Netlist to HDL Source

Single Design to Unlimited Desi gns

SYMBOL

datai(31:0) datao(31:0)

rst

clk

ofo

ufo

ifo

PINS DESCRIPTION

PIN TYPE DESCRIPTION

clk Input Global system clock

rst Input Global system reset

en Input Enable computing

datai[31:0] Input Data bus input

datao[31:0] Output Data bus output

ofo Output Overflow flag

ufo Output Underflow flag

ifo Output Invalid result flag

BLOCK DIAGRAM

datai(31:0) datao(31:0)

rst

clk

ofo

ufo

ifo

rgument

Checker Main FP

Pipelined Unit

Result

Composer

Arguments Checker - performs input data

analyze against IEEE-754 number standard

compliance. The appropriate numbers and

information about the input data classes are

given as the results to Main FP Pipelined

Unit.

Main FP Pipelined Unit - performs floating

point square root function. Gives the complex

information about the results to Result Com-

poser module.

Result Composer - performs result rounding

function, data alignment to IEEE-754 stan-

dard, and the final flags setting.

PERFORMANCE

The following table gives a survey about the

Core area and performance in the ALTERA®

devices after Place & Route :

Device Speed

grade Logic Cells Fmax

FLEX10KE -1 1000 48 MHz

ACEX1K -1 1000 48 MHz

APEX20K -1 970 50 MHz

APEX20KE -1 970 53 MHz

APEX20KC -7 970 62 MHz

APEX-II -7 970 83 MHz

MERCURY -5 975 99 MHz

STRATIX -5 725 96 MHz

CYCLONE -6 725 94 MHz

STRATIX-II -3 890 131 MHz

CYCLONE-II -6 730 99 MHz

Core performance in ALTERA® devices

All trademarks mentioned in this document

are trademarks of their respective owners.

http://www.DigitalCoreDesign.com

http://www.dcd.pl

CONTACTS

For any modification or special request

please contact to Digital Core Design or local

distributors.

Headquarters:

Wroclawska 94

41-902 Bytom, POLAND

e-mail: info@dcd.pl

tel. : +48 32 282 82 66

fax : +48 32 282 74 37

Distributors:

Please check http://www.dcd.pl/apartn.php