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| <div class="CGroup"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="Comparators" href="../../src/overviews/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 UVM library provides a base class called <i>uvm_in_order_comparator</i> and two derived classes: <i>uvm_in_order_built_in_comparator</i> for comparing streams of built-in types and <i>uvm_in_order_class_comparator</i> for comparing streams of class objects.</p><p>The <i>uvm_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="../../images/uvm_ref_comparators.gif" width="306" height="305"> |
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| <div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable> |
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| <tr class="SMain"><td colspan=2 class=SEntry><a href="#Comparators" >Comparators</a></td></tr> |
| <tr class=SMain><td colspan=2 class=SWideDescription>A common function of testbenches is to compare streams of transactions for equivalence. </td></tr></table></div></div><!--END_ND_SUMMARY--> |
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