We look at how both logical restructuring and improvements available from
successive versions of Fortran allow us to reduce the complexity (measured by
a number of the commonly used software metrics) of the Level 1 BLAS code used to
compute the modified Givens transformation. With these reductions in complexity
we claim that we have improved both the maintainability and clarity of the code;
in addition, we report a fix to a minor problem with the original code.
The performance of two commercial Fortran restructuring tools is also reported.