| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html lang="en"> |
| <head> |
| <title>Source code</title> |
| <link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body> |
| <div class="sourceContainer"> |
| <pre><span class="sourceLineNo">001</span>/*-<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *******************************************************************************<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Copyright (c) 2011, 2016 Diamond Light Source Ltd.<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * All rights reserved. This program and the accompanying materials<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * are made available under the terms of the Eclipse Public License v1.0<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * which accompanies this distribution, and is available at<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * http://www.eclipse.org/legal/epl-v10.html<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> *<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * Contributors:<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * Peter Chang - initial API and implementation and/or initial documentation<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *******************************************************************************/<a name="line.11"></a> |
| <span class="sourceLineNo">012</span><a name="line.12"></a> |
| <span class="sourceLineNo">013</span>package org.eclipse.january.dataset;<a name="line.13"></a> |
| <span class="sourceLineNo">014</span><a name="line.14"></a> |
| <span class="sourceLineNo">015</span>import java.util.Arrays;<a name="line.15"></a> |
| <span class="sourceLineNo">016</span>import java.util.List;<a name="line.16"></a> |
| <span class="sourceLineNo">017</span><a name="line.17"></a> |
| <span class="sourceLineNo">018</span>/**<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> * Class to run over a pair of datasets in parallel with NumPy broadcasting to promote shapes<a name="line.19"></a> |
| <span class="sourceLineNo">020</span> * which have lower rank and outputs to a third dataset<a name="line.20"></a> |
| <span class="sourceLineNo">021</span> */<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>public class BroadcastPairIterator extends BroadcastIterator {<a name="line.22"></a> |
| <span class="sourceLineNo">023</span> private int[] aShape;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span> private int[] bShape;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> private int[] aStride;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> private int[] bStride;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> private int[] oStride;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span> final private int endrank;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span><a name="line.30"></a> |
| <span class="sourceLineNo">031</span> private final int[] aDelta, bDelta;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> private final int[] oDelta; // this being non-null means output is different from inputs<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> private final int aStep, bStep, oStep;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> private int aMax, bMax;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> private int aStart, bStart, oStart;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> /**<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * <a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * @param a<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * @param b<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * @param o (can be null for new dataset, a or b)<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * @param createIfNull<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> */<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public BroadcastPairIterator(Dataset a, Dataset b, Dataset o, boolean createIfNull) {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> super(a, b, o);<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> List<int[]> fullShapes = BroadcastUtils.broadcastShapes(a.getShapeRef(), b.getShapeRef(), o == null ? null : o.getShapeRef());<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> maxShape = fullShapes.remove(0);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> oStride = null;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> if (o != null && !Arrays.equals(maxShape, o.getShapeRef())) {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> throw new IllegalArgumentException("Output does not match broadcasted shape");<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> }<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> aShape = fullShapes.remove(0);<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> bShape = fullShapes.remove(0);<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> int rank = maxShape.length;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> endrank = rank - 1;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> aDataset = a.reshape(aShape);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> bDataset = b.reshape(bShape);<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> aStride = BroadcastUtils.createBroadcastStrides(aDataset, maxShape);<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> bStride = BroadcastUtils.createBroadcastStrides(bDataset, maxShape);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> if (outputA) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> oStride = aStride;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> oDelta = null;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> oStep = 0;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> } else if (outputB) {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> oStride = bStride;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> oDelta = null;<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> oStep = 0;<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> } else if (o != null) {<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> oStride = BroadcastUtils.createBroadcastStrides(o, maxShape);<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> oDelta = new int[rank];<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> oStep = o.getElementsPerItem();<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> } else if (createIfNull) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> oDataset = BroadcastUtils.createDataset(a, b, maxShape);<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> oStride = BroadcastUtils.createBroadcastStrides(oDataset, maxShape);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> oDelta = new int[rank];<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> oStep = oDataset.getElementsPerItem();<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> } else {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> oDelta = null;<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> oStep = 0;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span><a name="line.85"></a> |
| <span class="sourceLineNo">086</span> pos = new int[rank];<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> aDelta = new int[rank];<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> aStep = aDataset.getElementsPerItem();<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> bDelta = new int[rank];<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> bStep = bDataset.getElementsPerItem();<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> for (int j = endrank; j >= 0; j--) {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> aDelta[j] = aStride[j] * aShape[j];<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> bDelta[j] = bStride[j] * bShape[j];<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> if (oDelta != null) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> oDelta[j] = oStride[j] * maxShape[j];<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> aStart = aDataset.getOffset();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> bStart = bDataset.getOffset();<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> aMax = endrank < 0 ? aStep + aStart: Integer.MIN_VALUE;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> bMax = endrank < 0 ? bStep + bStart: Integer.MIN_VALUE;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> oStart = oDelta == null ? 0 : oDataset.getOffset();<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> reset();<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> }<a name="line.104"></a> |
| <span class="sourceLineNo">105</span><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> @Override<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> public boolean hasNext() {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> int j = endrank;<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> int oldA = aIndex;<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> int oldB = bIndex;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> for (; j >= 0; j--) {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> pos[j]++;<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> aIndex += aStride[j];<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> bIndex += bStride[j];<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> if (oDelta != null) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> oIndex += oStride[j];<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> if (pos[j] >= maxShape[j]) {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> pos[j] = 0;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> aIndex -= aDelta[j]; // reset these dimensions<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> bIndex -= bDelta[j];<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> if (oDelta != null) {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> oIndex -= oDelta[j];<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> } else {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> break;<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> }<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> if (j == -1) {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> if (endrank >= 0) {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> return false;<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> }<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> aIndex += aStep;<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> bIndex += bStep;<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> if (oDelta != null) {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> oIndex += oStep;<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> if (outputA) {<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> oIndex = aIndex;<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> } else if (outputB) {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> oIndex = bIndex;<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> }<a name="line.143"></a> |
| <span class="sourceLineNo">144</span><a name="line.144"></a> |
| <span class="sourceLineNo">145</span> if (aIndex == aMax || bIndex == bMax) {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> return false;<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> }<a name="line.147"></a> |
| <span class="sourceLineNo">148</span><a name="line.148"></a> |
| <span class="sourceLineNo">149</span> if (read) {<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> if (oldA != aIndex) {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> if (asDouble) {<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> aDouble = aDataset.getElementDoubleAbs(aIndex);<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> } else {<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> aLong = aDataset.getElementLongAbs(aIndex);<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> }<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> }<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> if (oldB != bIndex) {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> if (asDouble) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> bDouble = bDataset.getElementDoubleAbs(bIndex);<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> } else {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> bLong = bDataset.getElementLongAbs(bIndex);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> }<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> }<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> return true;<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> }<a name="line.167"></a> |
| <span class="sourceLineNo">168</span><a name="line.168"></a> |
| <span class="sourceLineNo">169</span> /**<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> * @return shape of first broadcasted dataset<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> */<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> public int[] getFirstShape() {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> return aShape;<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> }<a name="line.174"></a> |
| <span class="sourceLineNo">175</span><a name="line.175"></a> |
| <span class="sourceLineNo">176</span> /**<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> * @return shape of second broadcasted dataset<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> */<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> public int[] getSecondShape() {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> return bShape;<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span><a name="line.182"></a> |
| <span class="sourceLineNo">183</span> @Override<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> public void reset() {<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> for (int i = 0; i <= endrank; i++) {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> pos[i] = 0;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span><a name="line.188"></a> |
| <span class="sourceLineNo">189</span> if (endrank >= 0) {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> pos[endrank] = -1;<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> aIndex = aStart - aStride[endrank];<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> bIndex = bStart - bStride[endrank];<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> oIndex = oStart - (oStride == null ? 0 : oStride[endrank]);<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> } else {<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> aIndex = aStart - aStep;<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> bIndex = bStart - bStep;<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> oIndex = oStart - oStep;<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> }<a name="line.198"></a> |
| <span class="sourceLineNo">199</span><a name="line.199"></a> |
| <span class="sourceLineNo">200</span> if (aIndex == 0 || bIndex == 0 || (endrank >= 0 && (aStride[endrank] == 0 || bStride[endrank] == 0))) { // for zero-ranked datasets or extended shape<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> if (read) {<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> storeCurrentValues();<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> }<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> }<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> }<a name="line.205"></a> |
| <span class="sourceLineNo">206</span>}<a name="line.206"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |
