PPT Slide
WHAT HAVE WE DONE?
PRE-SKEWED A , PRE-SKEWED B
BY ROWS BY COLS
ROTATE JTH ROW ROTATE JTH COLUMN
BY J-1 POSITIONS BY J-1 POSITIONS
TO LEFT TO TOP
THEN
1) ELEMENTWISE MULTIPLY
2) ROTATE A LEFT BY ROWS
ROTATE B TOP BY COLUMNS
3) ELEMENTWISE MULTIPLY AND SUM
4) REPEAT 2 AND 3
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