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Changed guide to new style

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Cirdans-Home
2021-04-01 17:45:57 +02:00
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@@ -10,7 +10,7 @@
<link rel="stylesheet" type="text/css" href="userhtml.css">
</head><body
>
<!--l. 113--><div class="crosslinks"><p class="noindent">[<a
<!--l. 111--><div class="crosslinks"><p class="noindent">[<a
href="userhtmlsu15.html" >next</a>] [<a
href="userhtmlsu10.html" >prev</a>] [<a
href="userhtmlsu10.html#tailuserhtmlsu10.html" >prev-tail</a>] [<a
@@ -18,7 +18,7 @@ href="userhtmlsu9.html#tailuserhtmlsu11.html">tail</a>] [<a
href="userhtmlsu12.html#userhtmlsu14.html" >up</a>] </p></div>
<h4 class="subsectionHead"><span class="titlemark">4.2 </span> <a
id="x20-570004.2"></a>psb_gedot &#8212; Dot Product</h4>
<!--l. 115--><p class="noindent" >This function computes dot product between two vectors <span
<!--l. 113--><p class="noindent" >This function computes dot product between two vectors <span
class="cmmi-10">x </span>and <span
class="cmmi-10">y</span>.<br
class="newline" />If <span
@@ -29,33 +29,43 @@ class="cmmi-10">y </span>are real vectors it computes dot-product as:
src="userhtml2x.png" alt=" T
dot &#x2190; x y
" class="math-display" ></center>
<!--l. 119--><p class="nopar" > Else if <span
<!--l. 117--><p class="nopar" > Else if <span
class="cmmi-10">x </span>and <span
class="cmmi-10">y </span>are complex vectors then it computes dot-product as:
<center class="math-display" >
<img
src="userhtml3x.png" alt="dot &#x2190; xHy
" class="math-display" ></center>
<!--l. 121--><p class="nopar" >
<!--l. 119--><p class="nopar" >
<!--l. 126--><p class="indent" > <span class="lstinline"></span><span
class="cmtt-10">psb_gedot</span><span
class="cmtt-10">(</span><span
class="cmtt-10">x</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">y</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">desc_a</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">info</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">[,</span><span
class="cmtt-10">global</span><span
class="cmtt-10">])</span> <div class="table">
<div class="verbatim" id="verbatim-41">
psb_gedot(x,&#x00A0;y,&#x00A0;desc_a,&#x00A0;info&#x00A0;[,global])
</div>
<!--l. 130--><p class="nopar" > <div class="table">
<!--l. 132--><p class="indent" > <a
id="x20-570012"></a><hr class="float"><div class="float"
<!--l. 128--><p class="indent" > <a
id="x20-57001r2"></a><hr class="float"><div class="float"
>
<div class="center"
>
<!--l. 133--><p class="noindent" >
<!--l. 129--><p class="noindent" >
<div class="tabular"> <table id="TBL-2" class="tabular"
cellspacing="0" cellpadding="0"
><colgroup id="TBL-2-1g"><col
@@ -92,7 +102,7 @@ class="hline"><td><hr></td><td><hr></td></tr><tr
class="td11"> </td></tr></table></div></div>
<br /> <div class="caption"
><span class="id">Table&#x00A0;2: </span><span
class="content">Data types</span></div><!--tex4ht:label?: x20-570012 -->
class="content">Data types</span></div><!--tex4ht:label?: x20-57001r2 -->
@@ -124,7 +134,7 @@ class="cmtt-10">psb</span><span
class="cmtt-10">_T</span><span
class="cmtt-10">_vect</span><span
class="cmtt-10">_type</span></a>&#x00A0;containing numbers of type specified in Table&#x00A0;<a
href="#x20-570012">2<!--tex4ht:ref: tab:f90dot --></a>. The
href="#x20-57001r2">2<!--tex4ht:ref: tab:f90dot --></a>. The
rank of <span
class="cmmi-10">x </span>must be the same of <span
class="cmmi-10">y</span>.
@@ -146,7 +156,7 @@ class="cmtt-10">psb</span><span
class="cmtt-10">_T</span><span
class="cmtt-10">_vect</span><span
class="cmtt-10">_type</span></a>&#x00A0;containing numbers of type specified in Table&#x00A0;<a
href="#x20-570012">2<!--tex4ht:ref: tab:f90dot --></a>. The
href="#x20-57001r2">2<!--tex4ht:ref: tab:f90dot --></a>. The
rank of <span
class="cmmi-10">y </span>must be the same of <span
class="cmmi-10">x</span>.
@@ -177,8 +187,11 @@ class="newline" />Type: <span
class="cmbx-10">optional</span>.<br
class="newline" />Intent: <span
class="cmbx-10">in</span>.<br
class="newline" />Specified as: a logical scalar. Default: <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">global=.true.</span></span></span><br
class="newline" />Specified as: a logical scalar. Default: <span class="lstinline"></span><span
class="cmtt-10">global</span><span
class="cmtt-10">=.</span><span
class="cmtt-10">true</span><span
class="cmtt-10">.</span><br
class="newline" />
</dd><dt class="description">
<span
@@ -191,11 +204,14 @@ class="description">is the dot product of vectors <span
class="cmmi-10">x </span>and <span
class="cmmi-10">y</span>.<br
class="newline" />Scope: <span
class="cmbx-10">global </span>unless the optional variable <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">global=.false.</span></span></span> has been
class="cmbx-10">global </span>unless the optional variable <span class="lstinline"></span><span
class="cmtt-10">global</span><span
class="cmtt-10">=.</span><span
class="cmtt-10">false</span><span
class="cmtt-10">.</span> has been
specified<br
class="newline" />Specified as: a number of the data type indicated in Table&#x00A0;<a
href="#x20-570012">2<!--tex4ht:ref: tab:f90dot --></a>.
href="#x20-57001r2">2<!--tex4ht:ref: tab:f90dot --></a>.
@@ -210,7 +226,7 @@ class="cmbx-10">required </span><br
class="newline" />Intent: <span
class="cmbx-10">out</span>.<br
class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
<!--l. 207--><p class="noindent" ><span
<!--l. 203--><p class="noindent" ><span
class="cmbx-12">Notes</span>
<ol class="enumerate1" >
<li
@@ -218,95 +234,19 @@ class="cmbx-12">Notes</span>
entails a significant overhead. It may be necessary and/or advisable to
compute multiple dot products at the same time; in this case, it is
possible to improve the runtime efficiency by using the following scheme:
<!--l. 214-->
<!--l. 218-->
<div class="lstlisting" id="listing-1"><span class="label"><a
id="x20-57004r1"></a></span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">vres</span><span
class="cmtt-10">(1)</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">=</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">psb_gedot</span><span
class="cmtt-10">(</span><span
class="cmtt-10">x1</span><span
class="cmtt-10">,</span><span
class="cmtt-10">y1</span><span
class="cmtt-10">,</span><span
class="cmtt-10">desc_a</span><span
class="cmtt-10">,</span><span
class="cmtt-10">info</span><span
class="cmtt-10">,</span><span
class="cmtt-10">global</span><span
class="cmtt-10">=.</span><span
class="cmtt-10">false</span><span
class="cmtt-10">.)</span><span
class="cmtt-10">&#x00A0;</span><br /><span class="label"><a
id="x20-57005r2"></a></span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">vres</span><span
class="cmtt-10">(2)</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">=</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">psb_gedot</span><span
class="cmtt-10">(</span><span
class="cmtt-10">x2</span><span
class="cmtt-10">,</span><span
class="cmtt-10">y2</span><span
class="cmtt-10">,</span><span
class="cmtt-10">desc_a</span><span
class="cmtt-10">,</span><span
class="cmtt-10">info</span><span
class="cmtt-10">,</span><span
class="cmtt-10">global</span><span
class="cmtt-10">=.</span><span
class="cmtt-10">false</span><span
class="cmtt-10">.)</span><span
class="cmtt-10">&#x00A0;</span><br /><span class="label"><a
id="x20-57006r3"></a></span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">vres</span><span
class="cmtt-10">(3)</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">=</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">psb_gedot</span><span
class="cmtt-10">(</span><span
class="cmtt-10">x3</span><span
class="cmtt-10">,</span><span
class="cmtt-10">y3</span><span
class="cmtt-10">,</span><span
class="cmtt-10">desc_a</span><span
class="cmtt-10">,</span><span
class="cmtt-10">info</span><span
class="cmtt-10">,</span><span
class="cmtt-10">global</span><span
class="cmtt-10">=.</span><span
class="cmtt-10">false</span><span
class="cmtt-10">.)</span><span
class="cmtt-10">&#x00A0;</span><br /><span class="label"><a
id="x20-57007r4"></a></span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">call</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">psb_sum</span><span
class="cmtt-10">(</span><span
class="cmtt-10">ictxt</span><span
class="cmtt-10">,</span><span
class="cmtt-10">vres</span><span
class="cmtt-10">(1:3))</span>
id="x20-57004r1"></a></span>&#x00A0;&#x00A0;&#x00A0;&#x00A0;vres(1)&#x00A0;=&#x00A0;psb_gedot(x1,y1,desc_a,info,global=.<span
class="cmbx-10">false</span>.)&#x00A0;<br /><span class="label"><a
id="x20-57005r2"></a></span>&#x00A0;&#x00A0;&#x00A0;&#x00A0;vres(2)&#x00A0;=&#x00A0;psb_gedot(x2,y2,desc_a,info,global=.<span
class="cmbx-10">false</span>.)&#x00A0;<br /><span class="label"><a
id="x20-57006r3"></a></span>&#x00A0;&#x00A0;&#x00A0;&#x00A0;vres(3)&#x00A0;=&#x00A0;psb_gedot(x3,y3,desc_a,info,global=.<span
class="cmbx-10">false</span>.)&#x00A0;<br /><span class="label"><a
id="x20-57007r4"></a></span>&#x00A0;&#x00A0;&#x00A0;&#x00A0;<span
class="cmbx-10">call</span>&#x00A0;psb_sum(ctxt,vres(1:3))
</div>
<!--l. 220--><p class="noindent" >In this way the global communication, which for small sizes is a latency-bound
<!--l. 225--><p class="noindent" >In this way the global communication, which for small sizes is a latency-bound
operation, is invoked only once.</li></ol>
@@ -314,12 +254,12 @@ class="cmtt-10">(1:3))</span>
<!--l. 230--><div class="crosslinks"><p class="noindent">[<a
<!--l. 235--><div class="crosslinks"><p class="noindent">[<a
href="userhtmlsu15.html" >next</a>] [<a
href="userhtmlsu10.html" >prev</a>] [<a
href="userhtmlsu10.html#tailuserhtmlsu10.html" >prev-tail</a>] [<a
href="userhtmlsu11.html" >front</a>] [<a
href="userhtmlsu12.html#userhtmlsu14.html" >up</a>] </p></div>
<!--l. 230--><p class="indent" > <a
<!--l. 235--><p class="indent" > <a
id="tailuserhtmlsu11.html"></a>
</body></html>