Dual Multiply-Accumulator Operation Optimized for Even and Odd Multisample Calculations

A method comprising:

• calculating a finite impulse response (FIR), including
• executing, in parallel,
• a first multiply accumulate operation of a first sample with a first coefficient;
• and
• a second multiply accumulate operation of a second sample with the first coefficient;
• wherein the first sample is an (n)th sample and the second sample is an (n+2)th sample in a plurality of sequential samples;
• and
• producing a signal based on the first multiply accumulate operation and the second multiply accumulate operation.

An article of manufacture comprising a storage medium having instructions stored thereon, the instructions operable to perform dual multiply-accumulate operations by causing a data processing system to:

• calculate, in parallel,
• a first multiplication product of a first coefficient and a first sample;
• and
• a second multiplication product of the first coefficient and a second sample;
• wherein the first sample is an (n)th sample and the second sample is an (n+2)th sample in a plurality of sequential samples;
• calculate, in parallel,
• a third multiplication product of a second coefficient and a third sample;
• and
• a fourth multiplication product of the second coefficient and a fourth sample, wherein the third sample is an (n+1)th sample and the fourth sample is an (n+3)th sample in the plurality of sequential samples;
• and
• form a signal based on the first multiplication product, the second multiplication product, the third multiplication product and the fourth multiplication product.