This table lists the general directives that affect DO loops:
| DISTRIBUTE POINT | NOUNROLL | VECTOR ALIGNED1 |
| IVDEP | NOVECTOR1 | VECTOR ALWAYS1 |
| LOOP COUNT | PARALLEL | VECTOR NONTEMPORAL1 |
| NOPARALLEL | PREFETCH | VECTOR UNALIGNED1 |
| NOPREFETCH | SWP2 | |
| NOSWP2 | UNROLL | |
| 1 i32, i64em 2 i64 only |
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The following rules apply to all of these directives:
Other rules may apply to these directives. For more information, see the description of each directive.