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Rules for Loop Directives that Affect Array Assignment Statements

When certain loop directives precede an array assignment statement, they affect the implicit loops that are generated by the compiler.

The following loop directives can affect array assignment statements:

FORCEINLINE

NOPREFETCH

UNROLL_AND_JAM

INLINE

NOUNROLL

VECTOR

IVDEP

NOVECTOR

LOOP COUNT

PARALLEL

NOFUSION

PREFETCH

NOINLINE

SIMD

NOPARALLEL

UNROLL

Only one of the above directives can precede the array assignment statement (one-dimensional-array = expression) to affect it.

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

Examples

Consider the following:

             REAL A(10), B(10)
             ...
        !DEC$ IVDEP
             A = B + 3

This has the same effect as writing the following explicit loop:

       !DEC$ IVDEP
             DO I = 1, 10
                A (I) = B (I) + 3
             END DO

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