Altera_mult_add (multiply-adder), Altera_mult_add (multiply-adder) -1 – Altera Integer Arithmetic IP User Manual
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ALTERA_MULT_ADD (Multiply-Adder)
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2014.12.19
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The ALTERA_MULT_ADD megafunction allows you to implement a multiplier-adder.
The following figure shows the ports for the ALTERA_MULT_ADD megafunction.
Figure 6-1: ALTERA_MULT_ADD Ports
dataa[]
inst
ALTERA_MULT_ADD
datab[]
signa
scanouta[]
signb
result[]
datac[]
coefsel1[]
addnsub1
addnsub3
clock0
ena0
accum_sload
chainin[]
coefsel2[]
coefsel3[]
coefsel0[]
aclr[]
scanina[]
sload_accum
clock1
clock2
ena1
ena2
aclr0
aclr1
A multiplier-adder accepts pairs of inputs, multiplies the values together and then adds to or subtracts
from the products of all other pairs.
The ALTERA_MULT_ADD megafunction also offers many variations in dedicated DSP block circuitry.
Data input sizes of up to 18 bits are accepted. Because the DSP blocks allow for one or two levels of 2-
input add or subtract operations on the product, this function creates up to four multipliers.
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