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<a href="#" onmousedown="showPopup(this, 'popup00861');"><img src="seealsolink.png" border="0" alt="" title=""></a> SystemVerilog 3.1a语言参考手册</div>
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H.4.1 Extended booleans</div>
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w denotes a non-empty finite or infinite word over Σ, j denotes an integer such that 0 < j < |w|, and T(V) denotes </p>
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an instance of a clocked or unclocked sequence that is passed the local variables V as actual arguments. </p>
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? w j,L0,L1 T(V).ended iff there exist 0 < i < j and L such that both w i, j, {}, L T(V) and </p>
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L1 = L0 |D U LV , where D = dom(L0) – (dom(L) V). </p>
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? w j,L0,L1 @(c)(T(V).matched) iff there exists 0 < i < j such that w i,L0,L1 </p>
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T(V).ended and </p>
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w i+1, j , {}, {} (!c [*0:$] ##1 c) . </p>
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? w j @(c)$stable(e) iff there exists 0 < i < j such that w </p>
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i, j , {}, {} (c ##1 c [->1]) and </p>
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e[w i] = e[w j]. </p>
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? w j @(c)$rose(e) iff b[w j] = 1 and (if there exists 0 < i < j such that w i, j ,{}, {} (c ##1 c [->1]) </p>
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then b[w i] 1), where b is the least-significant bit of e. </p>
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? w j @(c)$fell(e) iff b[w j] = 0 and (if there exists 0 < i < j such that w i, j ,{}, {} (c ##1 c [->1]) </p>
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then b[w i] 0), where b is the least-significant bit of e.</p></div>
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