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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.doc128.html">Prev</a> | <a href="Instructions2.doc130.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><hr><br> <a name="ladd"></a><h2>ladd</h2><a name="ladd.Operation"></a><b>Operation</b><br><a name="69254"></a>Add <code>long</code><p><Table Border="3"><tr><td><a name="69253"></a> <i>ladd</i><td><a name="87568"></a> </Table><Table><tr><td></Table><p><a name="ladd.Forms"></a><b>Forms</b><br><a name="69255"></a><i>ladd</i> = 97 (0x61)<p><a name="ladd.Stack"></a><b>Stack</b><br><a name="69256"></a>..., <i>value1.word1</i>, <i>value1.word2</i>, <i>value2.word1</i>, <i>value2.word2</i> <img src="chars/arrwdbrt.gif"> ..., <i>result.word1</i>, <i>result.word2</i><p><a name="ladd.Description"></a><b>Description</b><br><a name="69257"></a>Both <i>value1</i> and <i>value2</i> must be of type <code>long</code>. The values are popped from the operand stack. The <code>long</code> <i>result</i> is <i>value1</i> + <i>value2</i>. The <i>result</i> is pushed onto the operand stack.<p><a name="69258"></a>If a <code>long</code> addition overflows, then the result is the low-order bits of the mathematical sum as represented by a <code>long</code>. If overflow occurs, then the sign of the result will not be the same as the sign of the mathematical sum of the two values.<p><a name="69259"></a><p><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc128.html">Prev</a> | <a href="Instructions2.doc130.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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