Rules for General Directives that Affect DO Loops

This table lists the general directives that affect DO loops:

The PREFETCH and NOPREFETCH directives also affect DO loops, but they are only available on Intel® MIC Architecture.

The following rules apply to all of the general directives:

• The directive must precede the DO statement for each DO loop it affects. The DO statement can be any of the following:

  • A counted DO loop

  • A DO WHILE loop

  • A DO CONCURRENT loop

• No source code lines, other than the following, can be placed between the directive statement and the DO statement:

  • One of the other general directives that affect DO loops

  • An OpenMP* Fortran PARALLEL DO directive

  • Comment lines

  • Blank lines

Other rules may apply to these directives. For more information, see the description of each directive.