The following are comment form directives useful for optimizing source code. See the XL Fortran User's Guide for information on optimizing XL Fortran programs and the compiler options that affect performance.
Assertive directives gather information about source code that is otherwise
unavailable to the compiler. Providing this information can increase
performance.
ASSERT | CNCALL |
INDEPENDENT | PERMUTATION |
The following directives provide different methods of loop unrolling
to optimize the effectiveness of the DO construct in
source code:
BLOCK_LOOP | LOOPID |
STREAM_UNROLL | UNROLL |
UNROLL_AND_FUSE |
|