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| <div class="CGroup"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="Comparators" href="../../ovm_ref/comparators.txt">Comparators</a></h1><div class=CBody><p>A common function of testbenches is to compare streams of transactions for equivalence. For example, a testbench may compare a stream of transactions from a DUT with expected results.</p><p>The OVM library provides a base class called <i>ovm_in_order_comparator</i> and two derived classes: <i>ovm_in_order_built_in_comparator</i> for comparing streams of built-in types and <i>ovm_in_order_class_comparator</i> for comparing streams of class objects.</p><p>The <i>ovm_algorithmic_comparator</i> also compares two streams of transactions, but the transaction streams might be of different type objects. Thus, this comparator will employ a user-defined transformation function to convert one type to another before performing a comparison.</p><img src="nd/Images/ovm_ref_comparators.gif" width="306" height="305"></div></div></div> |
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