The multiply-accumulate operation computes a product and adds it to an accumulator.

$a\; \backslash leftarrow\; a\; +\; b\; \backslash times\; c$

When done with integers this operation is typically exact (computed modulo some power of 2).

When done with floating point numbers it might be performed with two roundings (typical in many DSPs) or with a single rounding, called a fused multiply-add (FMA).

See also

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• Digital signal processing
• Digital signal processor

Computer arithmetic | Digital signal processing

Multiply-accumulate | Multiply-Accumulate | Multiply-accumulate