Testing the Nonsymmetric Eigenvalue Routines

The test routine for the LAPACK nonsymmetric eigenvalue routines has the following parameters which may be varied:

• the order 118#118 of the test matrix 16#16
• the type of the test matrix 16#16
• three numerical parameters: the blocksize 119#119, the number of shifts 120#120 for the multishift QR method, and the (sub)matrix size 121#121 below or equal to which an unblocked, EISPACK-style method will be used

The test program thus consists of a triply-nested loop, the outer one over triples 122#122, the next over 118#118, and the inner one over matrix types. On each iteration of the innermost loop, a matrix 16#16 is generated and used to test the eigenvalue routines.

The number and size of the input values are limited by certain program maximums which are defined in PARAMETER statements in the main test program:

123#123

For the nonsymmetric eigenvalue input file, MAXIN is both the maximum number of values of N and the maximum number of 3-tuples (NB, NS, MAXB). Similar restrictions exist for the other input files for the eigenvalue test program.