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Document DESC%CNV method and MOLD arguments to CDASB and PREC%BUILD

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Salvatore Filippone
2017-12-14 17:09:59 +00:00
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<TITLE>descr -- Prints a description of current preconditioner</TITLE>
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<TITLE>apply -- Preconditioner application routine</TITLE>
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<H2><A NAME="SECTION000114000000000000000">
descr -- Prints a description of current
preconditioner</A>
<H2><A NAME="SECTION000113000000000000000">
apply -- Preconditioner application
routine</A>
</H2>
<P>
<PRE>
call prec%descr()
call prec%descr(iout, root)
call prec%apply(x,y,desc_a,info,trans,work)
call prec%apply(x,desc_a,info,trans)
</PRE>
<P>
<DL>
<DT><STRONG>Type:</STRONG></DT>
<DD>Asynchronous.
<DD>Synchronous.
</DD>
<DT><STRONG><B>On Entry</B></STRONG></DT>
<DD>
@@ -80,33 +77,72 @@ Intent: <B>in</B>.
<BR>
Specified as: a preconditioner data structure precdata<TT>psb_prec_type</TT>.
</DD>
<DT><STRONG>iout</STRONG></DT>
<DD>output unit.
<DT><STRONG>x</STRONG></DT>
<DD>the source vector.
Scope: <B>local</B>
<BR>
Type: <B>optional</B>
Type: <B>required</B>
<BR>
Intent: <B>in</B>.
Intent: <B>inout</B>.
<BR>
Specified as: an integer number. Default: default output unit.
Specified as: a rank one array or an object of type vdata<TT>psb_T_vect_type</TT>.
</DD>
<DT><STRONG>root</STRONG></DT>
<DD>Process from which to print
<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>.
<BR>
Specified as: a communication data structure descdata<TT>psb_desc_type</TT>.
</DD>
<DT><STRONG>trans</STRONG></DT>
<DD>Scope:
<BR>
Type: <B>optional</B>
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer number between 0 and <IMG
WIDTH="49" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
SRC="img156.png"
ALT="$np-1$">, in which case
the specified process will print the description, or <IMG
WIDTH="24" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
SRC="img78.png"
ALT="$-1$">, in which case
all processes will print. Default: 0.
Specified as: a character.
</DD>
<DT><STRONG>work</STRONG></DT>
<DD>an optional work space
Scope: <B>local</B>
<BR>
Type: <B>optional</B>
<BR>
Intent: <B>inout</B>.
<BR>
Specified as: a double precision array.
</DD>
</DL>
<P>
<DL>
<DT><STRONG><B>On Return</B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>y</STRONG></DT>
<DD>the destination vector.
Scope: <B>local</B>
<BR>
Type: <B>required</B>
<BR>
Intent: <B>inout</B>.
<BR>
Specified as: a rank one array or an object of type vdata<TT>psb_T_vect_type</TT>.
</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>