<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!--Converted with LaTeX2HTML 2018 (Released Feb 1, 2018) --> <HTML> <HEAD> <TITLE>build -- Builds a preconditioner</TITLE> <META NAME="description" CONTENT="build -- Builds a preconditioner"> <META NAME="keywords" CONTENT="userhtml"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2018"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="userhtml.css"> <LINK REL="next" HREF="node128.html"> <LINK REL="previous" HREF="node126.html"> <LINK REL="up" HREF="node125.html"> <LINK REL="next" HREF="node128.html"> </HEAD> <BODY > <DIV CLASS="navigation"><!--Navigation Panel--> <A NAME="tex2html1849" HREF="node128.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html1845" HREF="node125.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html1839" HREF="node126.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html1847" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html1850" HREF="node128.html">apply Preconditioner</A> <B> Up:</B> <A NAME="tex2html1846" HREF="node125.html">Preconditioner routines</A> <B> Previous:</B> <A NAME="tex2html1840" HREF="node126.html">init Initialize</A> <B> <A NAME="tex2html1848" HREF="node1.html">Contents</A></B> <BR> <BR></DIV> <!--End of Navigation Panel--> <H2><A NAME="SECTION000112000000000000000"> build -- Builds a preconditioner</A> </H2> <P> <PRE> call prec%build(a, desc_a, info[,amold,vmold,imold]) </PRE> <P> <DL> <DT><STRONG>Type:</STRONG></DT> <DD>Synchronous. </DD> <DT><STRONG><B>On Entry</B></STRONG></DT> <DD> </DD> <DT><STRONG>a</STRONG></DT> <DD>the system sparse matrix. Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>in</B>, target. <BR> Specified as: a sparse matrix data structure spdata<TT>psb_Tspmat_type</TT>. </DD> <DT><STRONG>prec</STRONG></DT> <DD>the preconditioner. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>inout</B>. <BR> Specified as: an already initialized precondtioner data structure precdata<TT>psb_prec_type</TT> <BR></DD> <DT><STRONG>desc_a</STRONG></DT> <DD>the problem communication descriptor. Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>in</B>, target. <BR> Specified as: a communication descriptor data structure descdata<TT>psb_desc_type</TT>. </DD> <DT><STRONG>amold</STRONG></DT> <DD>The desired dynamic type for the internal matrix storage. <BR> Scope: <B>local</B>. <BR> Type: <B>optional</B>. <BR> Intent: <B>in</B>. <BR> Specified as: an object of a class derived from spbasedata<TT>psb_T_base_sparse_mat</TT>. </DD> <DT><STRONG>vmold</STRONG></DT> <DD>The desired dynamic type for the internal vector storage. <BR> Scope: <B>local</B>. <BR> Type: <B>optional</B>. <BR> Intent: <B>in</B>. <BR> Specified as: an object of a class derived from vbasedata<TT>psb_T_base_vect_type</TT>. </DD> <DT><STRONG>imold</STRONG></DT> <DD>The desired dynamic type for the internal integer vector storage. <BR> Scope: <B>local</B>. <BR> Type: <B>optional</B>. <BR> Intent: <B>in</B>. <BR> Specified as: an object of a class derived from (integer) vbasedata<TT>psb_T_base_vect_type</TT>. </DD> </DL> <P> <DL> <DT><STRONG><B>On Return</B></STRONG></DT> <DD> </DD> <DT><STRONG>prec</STRONG></DT> <DD>the preconditioner. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>inout</B>. <BR> Specified as: a precondtioner data structure precdata<TT>psb_prec_type</TT> <BR></DD> <DT><STRONG>info</STRONG></DT> <DD>Error code. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>out</B>. <BR> An integer value; 0 means no error has been detected. </DD> </DL> The <code>amold</code>, <code>vmold</code> and <code>imold</code> arguments may be employed to interface with special devices, such as GPUs and other accelerators. <P> <DIV CLASS="navigation"><HR> <!--Navigation Panel--> <A NAME="tex2html1849" HREF="node128.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html1845" HREF="node125.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html1839" HREF="node126.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html1847" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html1850" HREF="node128.html">apply Preconditioner</A> <B> Up:</B> <A NAME="tex2html1846" HREF="node125.html">Preconditioner routines</A> <B> Previous:</B> <A NAME="tex2html1840" HREF="node126.html">init Initialize</A> <B> <A NAME="tex2html1848" HREF="node1.html">Contents</A></B> </DIV> <!--End of Navigation Panel--> </BODY> </HTML>