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| <pre><span class="sourceLineNo">001</span>/*-<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Copyright 2016 Diamond Light Source Ltd.<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> *<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><a name="line.9"></a> |
| <span class="sourceLineNo">010</span>package org.eclipse.january.dataset;<a name="line.10"></a> |
| <span class="sourceLineNo">011</span><a name="line.11"></a> |
| <span class="sourceLineNo">012</span>import java.util.ArrayList;<a name="line.12"></a> |
| <span class="sourceLineNo">013</span>import java.util.Arrays;<a name="line.13"></a> |
| <span class="sourceLineNo">014</span>import java.util.List;<a name="line.14"></a> |
| <span class="sourceLineNo">015</span><a name="line.15"></a> |
| <span class="sourceLineNo">016</span>public final class BroadcastUtils {<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> * Calculate shapes for broadcasting<a name="line.19"></a> |
| <span class="sourceLineNo">020</span> * @param oldShape<a name="line.20"></a> |
| <span class="sourceLineNo">021</span> * @param size<a name="line.21"></a> |
| <span class="sourceLineNo">022</span> * @param newShape<a name="line.22"></a> |
| <span class="sourceLineNo">023</span> * @return broadcasted shape and full new shape or null if it cannot be done<a name="line.23"></a> |
| <span class="sourceLineNo">024</span> */<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> public static int[][] calculateBroadcastShapes(int[] oldShape, int size, int... newShape) {<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> if (newShape == null)<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> return null;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> <a name="line.28"></a> |
| <span class="sourceLineNo">029</span> int brank = newShape.length;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> if (brank == 0) {<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> if (size == 1)<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> return new int[][] {oldShape, newShape};<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> return null;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> }<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> <a name="line.35"></a> |
| <span class="sourceLineNo">036</span> if (Arrays.equals(oldShape, newShape))<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> return new int[][] {oldShape, newShape};<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> <a name="line.38"></a> |
| <span class="sourceLineNo">039</span> int offset = brank - oldShape.length;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> if (offset < 0) { // when new shape is incomplete<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> newShape = padShape(newShape, -offset);<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> offset = 0;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> }<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> <a name="line.44"></a> |
| <span class="sourceLineNo">045</span> int[] bshape;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> if (offset > 0) { // new shape has extra dimensions<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> bshape = padShape(oldShape, offset);<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> } else {<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> bshape = oldShape;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> }<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> <a name="line.51"></a> |
| <span class="sourceLineNo">052</span> for (int i = 0; i < brank; i++) {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> if (newShape[i] != bshape[i] && bshape[i] != 1 && newShape[i] != 1) {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> return null;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> }<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> <a name="line.57"></a> |
| <span class="sourceLineNo">058</span> return new int[][] {bshape, newShape};<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> }<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> /**<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * Pad shape by prefixing with ones<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * @param shape<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * @param padding<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * @return new shape or old shape if padding is zero<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> */<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> public static int[] padShape(final int[] shape, final int padding) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> if (padding < 0)<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> throw new IllegalArgumentException("Padding must be zero or greater");<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> <a name="line.70"></a> |
| <span class="sourceLineNo">071</span> if (padding == 0)<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> return shape;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> <a name="line.73"></a> |
| <span class="sourceLineNo">074</span> final int[] nshape = new int[shape.length + padding];<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> Arrays.fill(nshape, 1);<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> System.arraycopy(shape, 0, nshape, padding, shape.length);<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> return nshape;<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> /**<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * Take in shapes and broadcast them to same rank<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * @param shapes<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * @return list of broadcasted shapes plus the first entry is the maximum shape<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> */<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> public static List<int[]> broadcastShapes(int[]... shapes) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> int maxRank = -1;<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> for (int[] s : shapes) {<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> if (s == null)<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> continue;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> <a name="line.90"></a> |
| <span class="sourceLineNo">091</span> int r = s.length;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (r > maxRank) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> maxRank = r;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> }<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> <a name="line.96"></a> |
| <span class="sourceLineNo">097</span> List<int[]> newShapes = new ArrayList<int[]>();<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> for (int[] s : shapes) {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> if (s == null)<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> continue;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> newShapes.add(padShape(s, maxRank - s.length));<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> <a name="line.103"></a> |
| <span class="sourceLineNo">104</span> int[] maxShape = new int[maxRank];<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> for (int i = 0; i < maxRank; i++) {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> int m = -1;<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> for (int[] s : newShapes) {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> int l = s[i];<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> if (l > m) {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> if (m > 1) {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> throw new IllegalArgumentException("A shape's dimension was not one or equal to maximum");<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> }<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> m = l;<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> }<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> maxShape[i] = m;<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> checkShapes(maxShape, newShapes);<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> newShapes.add(0, maxShape);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> return newShapes;<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> }<a name="line.122"></a> |
| <span class="sourceLineNo">123</span><a name="line.123"></a> |
| <span class="sourceLineNo">124</span> /**<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> * Take in shapes and broadcast them to maximum shape<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> * @param maxShape<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> * @param shapes<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> * @return list of broadcasted shapes<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> */<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> public static List<int[]> broadcastShapesToMax(int[] maxShape, int[]... shapes) {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> int maxRank = maxShape.length;<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> for (int[] s : shapes) {<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> if (s == null)<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> continue;<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> <a name="line.135"></a> |
| <span class="sourceLineNo">136</span> int r = s.length;<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> if (r > maxRank) {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> throw new IllegalArgumentException("A shape exceeds given rank of maximum shape");<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> }<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> <a name="line.141"></a> |
| <span class="sourceLineNo">142</span> List<int[]> newShapes = new ArrayList<int[]>();<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> for (int[] s : shapes) {<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> if (s == null)<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> continue;<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> newShapes.add(padShape(s, maxRank - s.length));<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> checkShapes(maxShape, newShapes);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> return newShapes;<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> }<a name="line.151"></a> |
| <span class="sourceLineNo">152</span><a name="line.152"></a> |
| <span class="sourceLineNo">153</span> private static void checkShapes(int[] maxShape, List<int[]> newShapes) {<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> for (int i = 0; i < maxShape.length; i++) {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> int m = maxShape[i];<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> for (int[] s : newShapes) {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> int l = s[i];<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> if (l != 1 && l != m) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> throw new IllegalArgumentException("A shape's dimension was not one or equal to maximum");<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> }<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> }<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> static Dataset createDataset(final Dataset a, final Dataset b, final int[] shape) {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> final Class<? extends Dataset> rc;<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> final int ar = a.getRank();<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> final int br = b.getRank();<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> Class<? extends Dataset> tc = InterfaceUtils.getBestInterface(a.getClass(), b.getClass());<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> if (ar == 0 ^ br == 0) { // ignore type of zero-rank dataset unless it's floating point <a name="line.170"></a> |
| <span class="sourceLineNo">171</span> if (ar == 0) {<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> rc = a.hasFloatingPointElements() ? tc : b.getClass();<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> } else {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> rc = b.hasFloatingPointElements() ? tc : a.getClass();<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> }<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> } else {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> rc = tc;<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> }<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> final int ia = a.getElementsPerItem();<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> final int ib = b.getElementsPerItem();<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> <a name="line.181"></a> |
| <span class="sourceLineNo">182</span> return DatasetFactory.zeros(ia > ib ? ia : ib, rc, shape);<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> }<a name="line.183"></a> |
| <span class="sourceLineNo">184</span><a name="line.184"></a> |
| <span class="sourceLineNo">185</span> /**<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> * Check if dataset item sizes are compatible<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> * <p><a name="line.187"></a> |
| <span class="sourceLineNo">188</span> * Dataset a is considered compatible with the output dataset if any of the<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> * conditions are true:<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> * <ul><a name="line.190"></a> |
| <span class="sourceLineNo">191</span> * <li>o is undefined</li><a name="line.191"></a> |
| <span class="sourceLineNo">192</span> * <li>a has item size equal to o's</li><a name="line.192"></a> |
| <span class="sourceLineNo">193</span> * <li>a has item size equal to 1</li><a name="line.193"></a> |
| <span class="sourceLineNo">194</span> * <li>o has item size equal to 1</li><a name="line.194"></a> |
| <span class="sourceLineNo">195</span> * </ul><a name="line.195"></a> |
| <span class="sourceLineNo">196</span> * @param a input dataset a<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> * @param o output dataset (can be null)<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> */<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> static void checkItemSize(Dataset a, Dataset o) {<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> final int isa = a.getElementsPerItem();<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> if (o != null) {<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> final int iso = o.getElementsPerItem();<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> if (isa != iso && isa != 1 && iso != 1) {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> throw new IllegalArgumentException("Can not output to dataset whose number of elements per item mismatch inputs'");<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> |
| <span class="sourceLineNo">207</span> }<a name="line.207"></a> |
| <span class="sourceLineNo">208</span><a name="line.208"></a> |
| <span class="sourceLineNo">209</span> /**<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> * Check if dataset item sizes are compatible<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> * <p><a name="line.211"></a> |
| <span class="sourceLineNo">212</span> * Dataset a is considered compatible with the output dataset if any of the<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> * conditions are true:<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> * <ul><a name="line.214"></a> |
| <span class="sourceLineNo">215</span> * <li>a has item size equal to b's</li><a name="line.215"></a> |
| <span class="sourceLineNo">216</span> * <li>a has item size equal to 1</li><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> * <li>b has item size equal to 1</li><a name="line.217"></a> |
| <span class="sourceLineNo">218</span> * <li>a or b are single-valued</li><a name="line.218"></a> |
| <span class="sourceLineNo">219</span> * </ul><a name="line.219"></a> |
| <span class="sourceLineNo">220</span> * and, o is undefined, or any of the following are true:<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> * <ul><a name="line.221"></a> |
| <span class="sourceLineNo">222</span> * <li>o has item size equal to maximum of a and b's</li><a name="line.222"></a> |
| <span class="sourceLineNo">223</span> * <li>o has item size equal to 1</li><a name="line.223"></a> |
| <span class="sourceLineNo">224</span> * <li>a and b have item sizes of 1</li><a name="line.224"></a> |
| <span class="sourceLineNo">225</span> * </ul><a name="line.225"></a> |
| <span class="sourceLineNo">226</span> * @param a input dataset a<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> * @param b input dataset b<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> * @param o output dataset<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> */<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> static void checkItemSize(Dataset a, Dataset b, Dataset o) {<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> final int isa = a.getElementsPerItem();<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> final int isb = b.getElementsPerItem();<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> if (isa != isb && isa != 1 && isb != 1) {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> // exempt single-value dataset case too<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> if ((isa == 1 || b.getSize() != 1) && (isb == 1 || a.getSize() != 1) ) {<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> throw new IllegalArgumentException("Can not broadcast where number of elements per item mismatch and one does not equal another");<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> }<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> if (o != null && o.getDType() != Dataset.BOOL) {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> final int ism = Math.max(isa, isb);<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> final int iso = o.getElementsPerItem();<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> if (iso != ism && iso != 1 && ism != 1) {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> throw new IllegalArgumentException("Can not output to dataset whose number of elements per item mismatch inputs'");<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> }<a name="line.246"></a> |
| <span class="sourceLineNo">247</span><a name="line.247"></a> |
| <span class="sourceLineNo">248</span> /**<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> * Create a stride array from a dataset to a broadcast shape<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> * @param a dataset<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> * @param broadcastShape<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> * @return stride array<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> */<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> public static int[] createBroadcastStrides(Dataset a, final int[] broadcastShape) {<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> return createBroadcastStrides(a.getElementsPerItem(), a.getShapeRef(), a.getStrides(), broadcastShape);<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> }<a name="line.256"></a> |
| <span class="sourceLineNo">257</span><a name="line.257"></a> |
| <span class="sourceLineNo">258</span> /**<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> * Create a stride array from a dataset to a broadcast shape<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> * @param isize<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> * @param oShape original shape<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> * @param oStride original stride<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> * @param broadcastShape<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> * @return stride array<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> */<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> public static int[] createBroadcastStrides(final int isize, final int[] oShape, final int[] oStride, final int[] broadcastShape) {<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> int rank = oShape.length;<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> if (broadcastShape.length != rank) {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> throw new IllegalArgumentException("Dataset must have same rank as broadcast shape");<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> }<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> <a name="line.271"></a> |
| <span class="sourceLineNo">272</span> int[] stride = new int[rank];<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> if (oStride == null) {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> int s = isize;<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> for (int j = rank - 1; j >= 0; j--) {<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> if (broadcastShape[j] == oShape[j]) {<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> stride[j] = s;<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> s *= oShape[j];<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> } else {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> stride[j] = 0;<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> }<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> }<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> } else {<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> for (int j = 0; j < rank; j++) {<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> if (broadcastShape[j] == oShape[j]) {<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> stride[j] = oStride[j];<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> } else {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> stride[j] = 0;<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> }<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> }<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> }<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> <a name="line.292"></a> |
| <span class="sourceLineNo">293</span> return stride;<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> }<a name="line.294"></a> |
| <span class="sourceLineNo">295</span><a name="line.295"></a> |
| <span class="sourceLineNo">296</span> /**<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> * Converts and broadcast all objects as datasets of same shape<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> * @param objects<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> * @return all as broadcasted to same shape<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> */<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> public static Dataset[] convertAndBroadcast(Object... objects) {<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> final int n = objects.length;<a name="line.302"></a> |
| <span class="sourceLineNo">303</span><a name="line.303"></a> |
| <span class="sourceLineNo">304</span> Dataset[] datasets = new Dataset[n];<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> int[][] shapes = new int[n][];<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> for (int i = 0; i < n; i++) {<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> Dataset d = DatasetFactory.createFromObject(objects[i]);<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> datasets[i] = d;<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> shapes[i] = d.getShapeRef();<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> }<a name="line.310"></a> |
| <span class="sourceLineNo">311</span><a name="line.311"></a> |
| <span class="sourceLineNo">312</span> List<int[]> nShapes = BroadcastUtils.broadcastShapes(shapes);<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> int[] mshape = nShapes.get(0);<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> for (int i = 0; i < n; i++) {<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> datasets[i] = datasets[i].getBroadcastView(mshape);<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> }<a name="line.316"></a> |
| <span class="sourceLineNo">317</span><a name="line.317"></a> |
| <span class="sourceLineNo">318</span> return datasets;<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> }<a name="line.319"></a> |
| <span class="sourceLineNo">320</span>}<a name="line.320"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
