| <html lang="en"> |
| <head> |
| <title>D30V-Opts - Using as</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Using as"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="D30V_002dDependent.html#D30V_002dDependent" title="D30V-Dependent"> |
| <link rel="next" href="D30V_002dSyntax.html#D30V_002dSyntax" title="D30V-Syntax"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| This file documents the GNU Assembler "as". |
| |
| Copyright (C) 1991-2019 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 |
| or any later version published by the Free Software Foundation; |
| with no Invariant Sections, with no Front-Cover Texts, and with no |
| Back-Cover Texts. A copy of the license is included in the |
| section entitled ``GNU Free Documentation License''. |
| |
| --> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="D30V-Opts"></a> |
| <a name="D30V_002dOpts"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="D30V_002dSyntax.html#D30V_002dSyntax">D30V-Syntax</a>, |
| Up: <a rel="up" accesskey="u" href="D30V_002dDependent.html#D30V_002dDependent">D30V-Dependent</a> |
| <hr> |
| </div> |
| |
| <h4 class="subsection">9.12.1 D30V Options</h4> |
| |
| <p><a name="index-options_002c-D30V-1006"></a><a name="index-D30V-options-1007"></a>The Mitsubishi D30V version of <code>as</code> has a few machine |
| dependent options. |
| |
| <dl> |
| <dt>‘<samp><span class="samp">-O</span></samp>’<dd>The D30V can often execute two sub-instructions in parallel. When this option |
| is used, <code>as</code> will attempt to optimize its output by detecting when |
| instructions can be executed in parallel. |
| |
| <br><dt>‘<samp><span class="samp">-n</span></samp>’<dd>When this option is used, <code>as</code> will issue a warning every |
| time it adds a nop instruction. |
| |
| <br><dt>‘<samp><span class="samp">-N</span></samp>’<dd>When this option is used, <code>as</code> will issue a warning if it |
| needs to insert a nop after a 32-bit multiply before a load or 16-bit |
| multiply instruction. |
| </dl> |
| |
| </body></html> |
| |
