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Operation Counts for the BLAS and LAPACK

In this appendix we reproduce in tabular form the formulas we have used to compute operation counts for the BLAS and LAPACK routines. In single precision, the functions SOPBL2, SOPBL3, SOPAUX, and SOPLA return the operation counts for the Level 2 BLAS, Level 3 BLAS, LAPACK auxiliary routines, and LAPACK routines, respectively. All four functions are found in the directory LAPACK/TIMING/LIN.

In the tables below, we give operation counts for the single precision real dense and banded routines (the counts for the symmetric packed routines are the same as for the dense routines). Separate counts are given for multiplies (including divisions) and additions, and the total is the sum of these expressions. For the complex analogues of these routines, each multiplication would count as 6 operations and each addition as 2 operations, so the total would be different. For the double precision routines, we use the same operation counts as for the single precision real or complex routines.



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Next: Operation Counts for the Up: lawn41 Previous: LAPACK Auxiliary Routines   Contents
Susan Blackford 2001-08-13