[Fwd: Re: [CSC 435] Super Fast Code Results (Don't Believe Everything you See)]

[Andrew J. Pounds]

Yep -- it tests for zeros in critical parts of the matrices to be 
multiplied.  In fact there are  sections in the SGEMM code that looks 
like the following...

                  IF( B( L, J ).NE.ZERO )THEN
                     TEMP = ALPHA*B( L, J )
                     DO 70, I = 1, M
                        C( I, J ) = C( I, J ) + TEMP*A( I, L )
   70                CONTINUE
                  END IF


-- 
Andrew J. Pounds, Ph.D.  (pounds at theochem.mercer.edu)
Associate Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627

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