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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.doc75.html">Prev</a> | <a href="Instructions2.doc77.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><hr><br> <a name="goto_w"></a><h2>goto_w</h2><a name="goto_w.Operation"></a><b>Operation</b><br><a name="68311"></a>Branch always (wide index)<p><Table Border="3"><tr><td><a name="68302"></a> <i>goto_w</i><td><a name="87568"></a> <tr><td><a name="68304"></a> <i>branchbyte1</i><td><a name="87568"></a> <tr><td><a name="68306"></a> <i>branchbyte2</i><td><a name="87568"></a> <tr><td><a name="68308"></a> <i>branchbyte3</i><td><a name="87568"></a> <tr><td><a name="68310"></a> <i>branchbyte4</i><td><a name="87568"></a> </Table><Table><tr><td></Table><p><a name="goto_w.Forms"></a><b>Forms</b><br><a name="68312"></a><i>goto_w</i> = 200 (0xc8)<p><a name="goto_w.Stack"></a><b>Stack</b><br><a name="68313"></a>No change<p><a name="goto_w.Description"></a><b>Description</b><br><a name="68314"></a>The unsigned bytes <i>branchbyte1</i>, <i>branchbyte2</i>, <i>branchbyte3</i>, and <i>branchbyte4</i> are used to construct a signed 32-bit <i>branchoffset</i>, where <i>branchoffset</i> is (<i>branchbyte1</i> << 24) | (<i>branchbyte2</i> << 16) | (<i>branchbyte3</i> << 8) | <i>branchbyte4</i>. Execution proceeds at that offset from the address of the opcode of this <i>goto_w</i> instruction. The target address must be that of an opcode of an instruction within the method that contains this <i>goto_w</i> instruction.<p><a name="goto_w.Notes"></a><b>Notes</b><br><a name="68315"></a>Although the <i>goto_w</i> instruction has a 4-byte branch offset, other factors limit the size of a Java method to 65535 bytes <a href="ClassFile.doc.html#6253">(§4.10)</a>. This limit may be raised in a future release of the Java Virtual Machine.<p><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc75.html">Prev</a> | <a href="Instructions2.doc77.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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