Altera Integer Arithmetic IP Bedienungsanleitung PDF herunterladen (Seite 30)

Parameter Name Type Required Description

LPM_REMAINDERPOSITIVE String No Altera-specific parameter. You must

use the LPM_HINT parameter to specify

the LPM_REMAINDERPOSITIVE

parameter in VHDL design files.

Values are TRUE or FALSE. If this

parameter is set to TRUE, then the value

of the remain[] port must be greater

than or equal to zero. If this parameter

is set to TRUE, then the value of the

remain[] port is either zero, or the

value is the same sign, either positive

or negative, as the value of the numer

port. In order to reduce area and

improve speed, Altera recommends

setting this parameter to TRUE in

operations where the remainder must

be positive or where the remainder is

unimportant.

MAXIMIZE_SPEED

Integer No Altera-specific parameter. You must

use the LPM_HINT parameter to specify

the MAXIMIZE_SPEED parameter in

VHDL design files. Values are [0..9].

If used, the Quartus II software

attempts to optimize a specific

instance of the LPM_DIVIDE function

for speed rather than routability, and

overrides the setting of the Optimiza‐

tion Technique logic option. If

MAXIMIZE_SPEED is unused, the value

of the Optimization Technique option

is used instead. If the value of

MAXIMIZE_SPEED is 6 or higher, the

Compiler optimizes the LPM_DIVIDE

megafunctions for higher speed by

using carry chains; if the value is 5 or

less, the compiler implements the

design without carry chains.

LPM_PIPELINE

Integer No Specifies the number of clock cycles of

latency associated with the

quotient[] and remain[] outputs. A

value of zero (0) indicates that no

latency exists, and that a purely

combinational function is instantiated.

If omitted, the default value is 0 (non-

pipelined). You cannot specify a value

for the LPM_PIPELINE parameter that

is higher than LPM_WIDTHN.

UG-01063

2014.12.19

Parameters

3-5

LPM_DIVIDE (Divider)

Altera Corporation

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