Altera Integer Arithmetic IP Manuale Utente Scaricare il pdf (Pagina 124)

Parameter Name Type Requi

red

Description

MUTIPLIER1_DIRECTION String No Specifies whether the second

multiplier adds or subtracts its

value from the sum. Values are

ADD and SUB. If the addnsub1 port

is used, this parameter is ignored.

If omitted, the default value is

ADD.

MUTIPLIER3_DIRECTION String No Specifies whether the fourth and

all subsequent odd-numbered

multipliers add or subtract their

results from the total. Values are

ADD and SUB. If the addnsub3 port

is used, this parameter is ignored.

If omitted, the default value is

ADD.

ACCUM_DIRECTION String No Specifies whether to use the

accumulator and whether the

accumulator adds or subtracts its

value from the sum. Values are

ADD and SUB. If omitted, the

default value is ADD.

OUTPUT_REGISTER String No Specifies the clock signal for the

second adder register. Values are

UNREGISTERED, CLOCK0,

CLOCK1, CLOCK2, and CLOCK3. If

omitted, the default value is

CLOCK0.

OUTPUT_ACLR String No Specifies the asynchronous clear

signal for the second adder

ACLR1, ACLR2, and ACLR3. If

omitted, the default value is

ACLR3.

PORT_SIGN[] String No Parameter [A,B]. Specifies the

corresponding sign[] input port

usage. Values are PORT_USED,

PORT_UNUSED, and PORT_

CONNECTIVITY. If omitted, the

default value is PORT_

CONNECTIVITY.

CHAINOUT_ROUND_TYPE String No Specifies the rounding mode at

the chainout stage. Values are

BIASED and UNBIASED. A value of

BIASED specifies round-to-

nearest-integer. A value of

UNBIASED specifies round-to-

nearest-even.

UG-01063

2014.12.19

ALTMULT_ADD Parameters

9-23

ALTMULT_ADD (Multiply-Adder)

Altera Corporation

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Altera Integer Arithmetic IP Manuale Utente Pagina 124

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