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<head><title>build — Builds a preconditioner</title>
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</head><body
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>
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<!--l. 87--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlse11.html" >next</a>] [<a
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href="userhtmlsu84.html" >prev</a>] [<a
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href="userhtmlsu86.html#userhtmlsu89.html" >up</a>] </p></div>
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<h4 class="subsectionHead"><span class="titlemark">10.2 </span> <a
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id="x101-13700010.2"></a>build — Builds a preconditioner</h4>
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<div class="verbatim" id="verbatim-80">
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call prec%build(a, desc_a, info[,amold,vmold,imold])
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</div>
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<!--l. 91--><p class="nopar" >
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<!--l. 93--><p class="indent" >
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">Type:</span> </dt><dd
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class="description">Synchronous.
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</dd><dt class="description">
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<span
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class="cmbx-10">On Entry</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">a</span> </dt><dd
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class="description">the system sparse matrix. Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required</span><br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>, target.<br
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class="newline" />Specified as: a sparse matrix data structure <a
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href="userhtmlsu6.html#spdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_Tspmat</span><span
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class="cmtt-10">_type</span></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">prec</span> </dt><dd
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class="description">the preconditioner.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required</span><br
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class="newline" />Intent: <span
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class="cmbx-10">inout</span>.<br
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class="newline" />Specified as: an already initialized precondtioner data structure
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<a
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href="userhtmlsu8.html#precdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_prec</span><span
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class="cmtt-10">_type</span></a><br
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class="newline" />
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</dd><dt class="description">
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<span
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class="cmbx-10">desc</span><span
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class="cmbx-10">_a</span> </dt><dd
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class="description">the problem communication descriptor. Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required</span><br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>, target.<br
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class="newline" />Specified as: a communication descriptor data structure <a
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href="userhtmlsu5.html#descdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_desc</span><span
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class="cmtt-10">_type</span></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">amold</span> </dt><dd
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class="description">The desired dynamic type for the internal matrix storage.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">optional</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an object of a class derived from <a
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id="spbasedata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_T</span><span
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class="cmtt-10">_base</span><span
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class="cmtt-10">_sparse</span><span
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class="cmtt-10">_mat</span></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">vmold</span> </dt><dd
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class="description">The desired dynamic type for the internal vector storage.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">optional</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an object of a class derived from <a
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id="vbasedata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_T</span><span
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class="cmtt-10">_base</span><span
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class="cmtt-10">_vect</span><span
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class="cmtt-10">_type</span></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">imold</span> </dt><dd
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class="description">The desired dynamic type for the internal integer vector storage.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">optional</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an object of a class derived from (integer)
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<a
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id="vbasedata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_T</span><span
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class="cmtt-10">_base</span><span
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class="cmtt-10">_vect</span><span
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class="cmtt-10">_type</span></a>.</dd></dl>
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<!--l. 133--><p class="indent" >
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">On Return</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">prec</span> </dt><dd
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class="description">the preconditioner.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required</span><br
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class="newline" />Intent: <span
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class="cmbx-10">inout</span>.<br
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class="newline" />Specified as: a precondtioner data structure <a
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href="userhtmlsu8.html#precdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_prec</span><span
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class="cmtt-10">_type</span></a><br
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class="newline" />
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</dd><dt class="description">
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<span
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class="cmbx-10">info</span> </dt><dd
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class="description">Error code.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required </span><br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
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<!--l. 146--><p class="noindent" >The <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">amold</span></span></span>, <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">vmold</span></span></span> and <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">imold</span></span></span> arguments may be employed to interface with special
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devices, such as GPUs and other accelerators.
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<!--l. 152--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlse11.html" >next</a>] [<a
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href="userhtmlsu84.html" >prev</a>] [<a
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href="userhtmlsu84.html#tailuserhtmlsu84.html" >prev-tail</a>] [<a
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href="userhtmlsu85.html" >front</a>] [<a
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href="userhtmlsu86.html#userhtmlsu89.html" >up</a>] </p></div>
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<!--l. 152--><p class="indent" > <a
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id="tailuserhtmlsu85.html"></a>
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</body></html>
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