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23 lines
1.0 KiB
TeX
23 lines
1.0 KiB
TeX
\pagebreak
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\begin{fortranspecific}[4ex]
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\section{Fortran Comments (Fixed Source Form)}
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\label{sec:fortran_fixed_format_comments}
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\index{directive syntax!fixed form, Fortran}
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\index{fixed form syntax, Fortran}
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OpenMP directives in Fortran codes with fixed source form are specified as comments with one of the
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\scode{!$omp}, \scode{c$omp}, and \scode{*$omp} sentinels, followed by a
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directive name, and required and optional clauses. The sentinel must begin in column 1.
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In the example below the first directive (DIR 1) specifies the %parallel work-sharing
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\kcode{parallel do} combined directive, with a \kcode{num_threads} clause, and a comment.
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The second directive (DIR 2) shows the same directive split
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across two lines. The next nested directives (DIR 3 and 4) show the previous combined directive as
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two separate directives.
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Here, an \kcode{end} directive (\kcode{end parallel}) must be specified to demarcate the range (region)
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of the \kcode{parallel} directive.
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\fnexample{directive_syntax_F_fixed_comment}{1}
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\end{fortranspecific}
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\clearpage
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