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📁 Jvm 规范说明。The Java Virtual Machine was designed to support the Java programming language. Some concep

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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.doc98.html">Prev</a> | <a href="Instructions2.doc100.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><hr><br> <a name="imul"></a><h2>imul</h2><a name="imul.Operation"></a><b>Operation</b><br><a name="68676"></a>Multiply <code>int</code><p><Table Border="3"><tr><td><a name="68675"></a> <i>imul</i><td><a name="87568"></a> </Table><Table><tr><td></Table><p><a name="imul.Forms"></a><b>Forms</b><br><a name="68677"></a><i>imul</i> = 104 (0x68)<p><a name="imul.Stack"></a><b>Stack</b><br><a name="68678"></a>..., <i>value1</i><em>, </em><i>value2</i> <img src="chars/arrwdbrt.gif"> ..., <i>result</i><p><a name="imul.Description"></a><b>Description</b><br><a name="68679"></a>Both <i>value1</i> and <i>value2</i> must be of type <code>int</code>. The values are popped from the operand stack. The <code>int</code> <i>result</i> is <i>value1</i> * <i>value2</i>. The <i>result</i> is pushed onto the operand stack.<p><a name="68680"></a>If an <code>int</code> multiplication overflows, then the result is the low-order bits of the mathematical product as an <code>int</code>. If overflow occurs, then the sign of the result may not be the same as the sign of the mathematical product of the two values.<p><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc98.html">Prev</a> | <a href="Instructions2.doc100.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 &#169 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>

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