/machine, /ma, /noma, (machine=s)

5.5.18 /machine, /ma, /noma, (machine=s)

Set the machine qualifier according to the characteristics of the system on which KAP Fortran output runs.

Use any combination of the following qualifier settings, but do not specify qualifiers s and n simultaneously:

n - Prefers nonstride-1 array access over stride-1 array access. This is suitable for machine architectures that have special interleaved memory hardware where nonstride-1 array access provides the best performance.
o - Directs KAP Fortran not to parallelize innermost loops when optimizing, that is, to parallelize only outermost loops. This capability is available to prevent concurrentization on applications that have small inner loop bounds, thereby reducing overhead costs. KAP Fortran makes decisions concerning the overhead:benefit ratio when making concurrentization decisions. When the loop bounds are unknown at compile time, KAP Fortran may generate concurrent code for innermost loops, a practice that may be inefficient for the actual loop bounds.
s - Directs KAP Fortran to prefer optimization of a DO loop that generates stride-1 (contiguous) references over one which generates nonstride-1 operands. Some computers perform better if consecutive references are contiguous in memory.

To disable all of the qualifier settings, enter /nomachine on the command line.