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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.doc36.html">Prev</a> | <a href="Instructions2.doc38.html">Next</a> | <a href="Mnemonics.doc.html">Index</a><hr><br> <a name="drem"></a><h2>drem</h2><a name="drem.Operation"></a><b>Operation</b><br><a name="67676"></a>Remainder <code>double</code><p><Table Border="3"><tr><td><a name="67675"></a> <i>drem</i><td><a name="87568"></a> </Table><Table><tr><td></Table><p><a name="drem.Forms"></a><b>Forms</b><br><a name="67677"></a><i>drem</i><em> </em>= 115 (0x73)<p><a name="drem.Stack"></a><b>Stack</b><br><a name="67678"></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="drem.Description"></a><b>Description</b><br><a name="67679"></a>Both <i>value1</i> and <i>value2</i> must be of type <code>double</code>. The values are popped from the operand stack. The <i>result</i> is calculated and pushed onto the operand stack as a <code>double</code>.<p><a name="67680"></a>The result of a <i>drem</i> instruction is not the same as that of the so-called remainder operation defined by IEEE 754. The IEEE 754 "remainder" operation computes the remainder from a rounding division, not a truncating division, and so its behavior is <i>not</i> analogous to that of the usual integer remainder operator. Instead, the Java Virtual Machine defines <i>drem</i> to behave in a manner analogous to that of the Java Virtual Machine integer remainder instructions (<i>irem</i> and <i>lrem</i>); this may be compared with the C library function <code>fmod</code>.<p><a name="67684"></a>The result of a <i>drem</i> instruction is governed by these rules:<p><ul><a name="67685"></a><li>If either value is NaN, the result is NaN.<a name="67686"></a><li>If neither value is NaN, the sign of the result equals the sign of the dividend.<a name="67687"></a><li>If the dividend is an infinity, or the divisor is a zero, or both, the result is NaN.<a name="67688"></a><li>If the dividend is finite and the divisor is an infinity, the result equals the dividend.</ul><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="Instructions2.doc36.html">Prev</a> | <a href="Instructions2.doc38.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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