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doc: mention quarter square mult is ancient apparently

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Vince Weaver 2018-04-26 23:48:16 -04:00
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mode7_demo/docs/mode7_demo.tex
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@ -487,6 +487,9 @@ the 6502.
A typical implementation takes around 700 cycles
for a 8.8 x 8.8 fixed point multiply.
% Note, this is Quarter-square multiplication, apparently an ancient algorithm
% https://en.wikipedia.org/wiki/Multiplication_algorithm#Quarter_square_multiplication
We improved this by using the fast multiply algorithm
described by Stephen Judd.