Altera Integer Arithmetic IP User Manual

Page 121

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Parameter Name

Type

Requi

red

Description

INPUT_SOURCE_B2

String

No

Specifies the data source of the

third 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 in sum 2 (sum of two)

mode, a value of

LOOPBACK

is

available.

INPUT_SOURCE_B3

String

No

Specifies the data source of the

fourth and corresponding

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.

9-20

ALTMULT_ADD Parameters

UG-01063

2014.12.19

Altera Corporation

ALTMULT_ADD (Multiply-Adder)

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