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+title = "MAC Optimisations"
+date = "2022-11-09"
+author = "Yann Herklotz"
+tags = []
+categories = []
+backlinks = ["5b2", "1c4b1"]
+forwardlinks = ["5b1b"]
+zettelid = "5b3"
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+
+One useful optimisation is performing a fused multiply and add, which
+can be done directly using the DSP units on the FPGA. One example of
+such an implementation is using a carry-save adder ([\#5b1b]) actually,
+as the multiplication will use various additions, which can just be
+chained as a large array of full-adders like in the the carry-save
+adder. Then, the accumulator can also be added to this parallel chain of
+full-adders before the carry is reconciled with a propagate adder at the
+end.
+
+  [\#5b1b]: /zettel/5b1b