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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.doc91.html">Prev</a> | <a href="Instructions2.doc93.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><hr><br> <a name="ifcond"></a><h2>if<cond></h2><a name="ifcond.Operation"></a><b>Operation</b><br><a name="68570"></a>Branch if <code>int</code> comparison with zero succeeds<p><Table Border="3"><tr><td><a name="68565"></a> <i>if<cond></i><td><a name="87568"></a> <tr><td><a name="68567"></a> <i>branchbyte1</i><td><a name="87568"></a> <tr><td><a name="68569"></a> <i>branchbyte2</i><td><a name="87568"></a> </Table><Table><tr><td></Table><p><a name="ifcond.Forms"></a><b>Forms</b><br><a name="68571"></a><i>ifeq </i>= 153 (0x99) <i>ifne</i> = 154 (0x9a) <i>iflt</i> = 155 (0x9b) <i>ifge</i> = 156 (0x9c) <i>ifgt</i> = 157 (0x9d) <i>ifle</i> = 158 (0x9e)<p><a name="ifcond.Stack"></a><b>Stack</b><br><a name="68572"></a>..., <i>value</i> <img src="chars/arrwdbrt.gif"> ...<p><a name="ifcond.Description"></a><b>Description</b><br><a name="68573"></a>The <i>value</i> must be of type <code>int</code>. It is popped from the operand stack and compared against zero. All comparisons are signed. The results of the comparisons are as follows:<p><ul><a name="68574"></a><li><i>eq</i> succeeds if and only if <i>value</i> = 0<a name="68575"></a><li><i>ne</i> succeeds if and only if <i>value</i> <img src="chars/notequal.gif"> 0<a name="68576"></a><li><i>lt</i> succeeds if and only if <i>value</i> < 0<a name="68577"></a><li><i>le</i> succeeds if and only if <i>value</i> £ 0<a name="68578"></a><li><i>gt</i> succeeds if and only if <i>value</i> > 0<a name="68579"></a><li><i>ge</i> succeeds if and only if <i>value</i> <img src="chars/gtequal.gif"> 0</ul><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc91.html">Prev</a> | <a href="Instructions2.doc93.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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