Altera Integer Arithmetic IP User Manual
Page 121
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)