Translating element access

We only need to consider the case where the array reference is a multiarray. The general scheme is illustrated in Figure A.26. The macro OFFSET is defined as

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} $\mbox{\it OF... ...-1}\left[{a}\right], e_{R-1}\right)$\end{tabbing}\end{minipage}$$

There are three cases for the macro OFFSET_DIM depending on whether the subscript argument is an integer subscripts (in a sequential dimension), a distributed index, or a shifted index.

If $e_r$ is an integer expression (which implies that $a'_r$ has type SeqArrayDim), then

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} $\mbox{\it OF... ...f_stp * $${\bf T}\left[{e_r}\right]$\end{tabbing}\end{minipage}$$

The fields off_bas and off_stp are initialized by the constructors for SeqArrayDim. They do not exist in the superclass ArrayDim.

Otherwise, if $e_r$ is a distributed index $i$, then

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} $\mbox{\it OF... ..._r$\verb$.stride * $$\mbox{\it sub}$\end{tabbing}\end{minipage}$$

where $\mbox{\it sub}$ is the local subscript variable for this index (see sections A.4.6 and A.4.7).

Otherwise, if $e_r$ is a shifted index $i \pm d$, then

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} $\mbox{\it OF... ... $${\bf T}\left[{d}\right]$\verb$)$ \end{tabbing}\end{minipage}$$

where $\mbox{\it sub}$ is the local subscript variable and $\mbox{\it stp}$ is the shift step variable for $i$ (again, see sections A.4.6 and A.4.7).

Figure A.27: Translation of array section with no scalar subscripts.

SOURCE:

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} $v$\verb$ = $... ... $\mbox{\it subs}_{R-1}$\verb$]] ;$ \end{tabbing}\end{minipage}$$

TRANSLATION:

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} $\mbox{\it PR... ...all bas}}\left[{a}\right]$\verb$ ;$ \end{tabbing}\end{minipage}$$

where:

$$\begin{array}{l} \mbox{The expression $v$ is the assigned a... ... {\it PROCESS\_SUBSCRIPTS} is defined in the text.} \end{array}$$