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

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Salvatore Filippone
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<TITLE>psb_amx -- Global maximum absolute value</TITLE>
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<H2><A NAME="SECTION000813000000000000000">
psb_amx -- Global maximum absolute value</A>
<H2><A NAME="SECTION000812000000000000000">
psb_min -- Global minimum</A>
</H2>
<P>
<PRE>
call psb_amx(icontxt, dat, root)
call psb_min(icontxt, dat, root)
</PRE>
<P>
This subroutine implements a maximum absolute value reduction
This subroutine implements a minimum value reduction
operation based on the underlying communication library.
<DL>
<DT><STRONG>Type:</STRONG></DT>
@@ -83,7 +80,7 @@ Intent: <B>in</B>.
Specified as: an integer variable.
</DD>
<DT><STRONG>dat</STRONG></DT>
<DD>The local contribution to the global maximum.
<DD>The local contribution to the global minimum.
<BR>
Scope: <B>local</B>.
<BR>
@@ -91,14 +88,14 @@ Type: <B>required</B>.
<BR>
Intent: <B>inout</B>.
<BR>
Specified as: an integer, real or complex variable, which may be a
Specified as: an integer or real variable, which may be a
scalar, or a rank 1 or 2 array. Type, kind, rank and size must agree on all processes.
</DD>
<DT><STRONG>root</STRONG></DT>
<DD>Process to hold the final value, or <IMG
<DD>Process to hold the final value, or <SPAN CLASS="MATH"><IMG
WIDTH="24" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
SRC="img78.png"
ALT="$-1$"> to make it available
ALT="$-1$"></SPAN> to make it available
on all processes.
<BR>
Scope: <B>global</B>.
@@ -110,10 +107,10 @@ Intent: <B>in</B>.
Specified as: an integer value <!-- MATH
$-1<= root <= np-1$
-->
<IMG
<SPAN CLASS="MATH"><IMG
WIDTH="165" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
SRC="img132.png"
ALT="$-1&lt;= root &lt;= np-1$">, default -1.
ALT="$-1&lt;= root &lt;= np-1$"></SPAN>, default -1.
<BR></DD>
</DL>
@@ -123,7 +120,7 @@ Specified as: an integer value <!-- MATH
<DD>
</DD>
<DT><STRONG>dat</STRONG></DT>
<DD>On destination process(es), the result of the maximum operation.
<DD>On destination process(es), the result of the minimum operation.
<BR>
Scope: <B>global</B>.
<BR>
@@ -131,13 +128,15 @@ Type: <B>required</B>.
<BR>
Intent: <B>inout</B>.
<BR>
Specified as: an integer, real or complex variable, which may be a
scalar, or a rank 1 or 2 array. Type, kind, rank and size must agree on all processes.
Specified as: an integer or real variable, which may be a
scalar, or a rank 1 or 2 array.
<BR>
Type, kind, rank and size must agree on all processes.
</DD>
</DL>
<P>
<FONT SIZE="+1"><B>Notes</B></FONT>
<BIG CLASS="LARGE"><B>Notes</B></BIG>
<OL>
<LI>The <code>dat</code> argument is both input and output, and its
@@ -149,29 +148,30 @@ scalar, or a rank 1 or 2 array. Type, kind, rank and size must agree on all pro
</OL>
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