Altera Integer Arithmetic IP User Manual
Page 120
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