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procedure FLOYD_ALL_PAIRS_SP(E) begin D(0) = E; for k := 1 to n do for i := 1 to n do for j := 1 to n do di kj PLQ di kj di kk dk k j ;
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5.
each process Pi,j that has a segment of the kth row of D(k-1); broadcasts it to the P*,j processes;
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each process Pi,j that has a segment of the kth column of D(k-1); broadcasts it to the Pi,* processes;
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each process waits to receive the needed segments;
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each process Pi,j computes its part of the D(k) matrix;
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Each Process initializes the submatrix of D(0) with the submatrix of A. Processor P1,j (j=1,…,p1/2) of the 1st row of D(0) to i’1; and processes Pi’,j the segment of the 1st row
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