📄 instructions2.doc122.html

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

💻 HTML

字号:

<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.doc121.html">Prev</a> | <a href="Instructions2.doc123.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><hr><br> <a name="isub"></a><h2>isub</h2><a name="isub.Operation"></a><b>Operation</b><br><a name="69108"></a>Subtract <code>int</code><p><Table Border="3"><tr><td><a name="69107"></a> <i>isub</i><td><a name="87568"></a> </Table><Table><tr><td></Table><p><a name="isub.Forms"></a><b>Forms</b><br><a name="69109"></a><i>isub</i> = 100 (0x64)<p><a name="isub.Stack"></a><b>Stack</b><br><a name="69110"></a>..., <i>value1</i><em>, </em><i>value2</i> <img src="chars/arrwdbrt.gif"> ..., <i>result</i><p><a name="isub.Description"></a><b>Description</b><br><a name="69111"></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="69112"></a>For <code>int</code> subtraction, <code>a</code> - <code>b</code> produces the same result as <code>a</code> + <code>(</code>-<code>b)</code>. For <code>int</code> values, subtraction from zero is the same as negation.<p><a name="69113"></a>Despite the fact that overflow or underflow may occur, in which case the <i>result</i> may have a different sign than the true mathematical result, execution of an <i>isub</i> instruction never throws a runtime exception.<p><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc121.html">Prev</a> | <a href="Instructions2.doc123.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>

⌨️ 快捷键说明

复制代码 Ctrl + C

搜索代码 Ctrl + F

全屏模式 F11

切换主题 Ctrl + Shift + D

显示快捷键 ?

增大字号 Ctrl + =

减小字号 Ctrl + -