Altera Integer Arithmetic IP User Manual

Page 120

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Parameter Name

Type

Requi

red

Description

INPUT_SOURCE_A3

String

No

Specifies the data source to the

fourth and corresponding

multiplier. Values are

DATAA

and

SCANA

. If this parameter is set to

DATAA

, the adder uses the values

from the

dataa[]

port. If this

parameter is set to

SCANA

, the

adder uses values from the scan

chain. If omitted, the default

value is

DATAA

. For Stratix II

devices, a value of

VARIABLE

is

available for the adder to perform

rounding and saturation on the

data source before feeding the

result to the multiplier.

INPUT_SOURCE_B0

String

No

Specifies the data source of the

first multiplier. Values are

DATAB

and

SCANB

. If this parameter is set

to

DATAB

, then the adder uses the

values from the

datab[]

port. If

this parameter is set to

SCANB

,

then the adder uses values from

the scan chain. If omitted, the

default value is

DATAB

. For Stratix

II devices, a value of

VARIABLE

is

available for the adder to perform

rounding and saturation on the

data source before feeding the

result to the multiplier. For

Stratix III devices in sum 2 (sum

of two) mode, a value of

LOOPBACK

is available.

INPUT_SOURCE_B1

String

No

Specifies the data source of the

second multiplier. Values are

DATAB

and

SCANB

. If this

parameter is set to

DATAB

, then

the adder uses the values from the

datab[]

port. If this parameter

is set to

SCANB

, then the adder

uses values from the scan chain.

If omitted, the default value is

DATAB

. For Stratix II devices, a

value of

VARIABLE

is available for

the adder to perform rounding

and saturation on the data source

before feeding the result to the

multiplier. For Stratix III devices

in sum 2 (sum of two) mode, a

value of

LOOPBACK

is available.

UG-01063

2014.12.19

ALTMULT_ADD Parameters

9-19

ALTMULT_ADD (Multiply-Adder)

Altera Corporation

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