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<html><head><title>VM Spec </title></head><body BGCOLOR=#eeeeff text=#000000 LINK=#0000ff VLINK=#000077 ALINK=#ff0000> <a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc167.html">Prev</a> | <a href="Instructions2.doc169.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><hr><br> <a name="pop2"></a><h2>pop2</h2><a name="pop2.Operation"></a><b>Operation</b><br><a name="69898"></a>Pop top two operand stack word<p><Table Border="3"><tr><td><a name="69897"></a> <i>pop2</i><td><a name="87568"></a> </Table><Table><tr><td></Table>s<p><a name="pop2.Forms"></a><b>Forms</b><br><a name="69899"></a><i>pop2</i> = 88 (0x58)<p><a name="pop2.Stack"></a><b>Stack</b><br><a name="69900"></a>...,<em> </em><i>word2</i>, <i>word1</i><em> </em><img src="chars/arrwdbrt.gif"> ...<p><a name="pop2.Description"></a><b>Description</b><br><a name="69901"></a>The top two words are popped from the operand stack. <p><a name="69902"></a>The <i>pop2</i> instruction must not be used unless each of word <i>word1</i> and <i>word2</i> is a word that contains a 32-bit data types or together are the two words of a single 64-bit datum.<p><a name="pop2.Notes"></a><b>Notes</b><br><a name="69903"></a>Except for restrictions preserving the integrity of 64-bit data types, the <i>pop2</i> instruction operates on raw words, ignoring the types of the data they contain.<p><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc167.html">Prev</a> | <a href="Instructions2.doc169.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><p><font size=-1>Java Virtual Machine Specification (HTML generated by dkramer on February 25, 1997)<br><i><a href="Copyright.doc.html">Copyright © 1996 Sun Microsystems, Inc.</a>All rights reserved</i><br>Please send any comments or corrections to <a href="mailto:doug.kramer@sun.com">doug.kramer@sun.com</a></font></body></html>⌨️ 快捷键说明
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