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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

  2. <html>

  3. <!-- This file documents the GNU Assembler "as".

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  17. <title>D10V-Opts (Using as)</title>

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  26. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">

  27. <link href="D10V_002dDependent.html#D10V_002dDependent" rel="up" title="D10V-Dependent">

  28. <link href="D10V_002dSyntax.html#D10V_002dSyntax" rel="next" title="D10V-Syntax">

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  64. <p>

  65. Next: <a href="D10V_002dSyntax.html#D10V_002dSyntax" accesskey="n" rel="next">D10V-Syntax</a>, Up: <a href="D10V_002dDependent.html#D10V_002dDependent" accesskey="u" rel="up">D10V-Dependent</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>

  66. </div>

  67. <hr>

  68. <a name="D10V-Options"></a>

  69. <h4 class="subsection">9.11.1 D10V Options</h4>

  70. <a name="index-options_002c-D10V"></a>

  71. <a name="index-D10V-options"></a>

  72. <p>The Mitsubishi D10V version of <code>as</code> has a few machine

  73. dependent options.

  74. </p>

  75. <dl compact="compact">

  76. <dt>&lsquo;<samp>-O</samp>&rsquo;</dt>

  77. <dd><p>The D10V can often execute two sub-instructions in parallel. When this option

  78. is used, <code>as</code> will attempt to optimize its output by detecting when

  79. instructions can be executed in parallel.

  80. </p></dd>

  81. <dt>&lsquo;<samp>--nowarnswap</samp>&rsquo;</dt>

  82. <dd><p>To optimize execution performance, <code>as</code> will sometimes swap the

  83. order of instructions. Normally this generates a warning. When this option

  84. is used, no warning will be generated when instructions are swapped.

  85. </p></dd>

  86. <dt>&lsquo;<samp>--gstabs-packing</samp>&rsquo;</dt>

  87. <dt>&lsquo;<samp>--no-gstabs-packing</samp>&rsquo;</dt>

  88. <dd><p><code>as</code> packs adjacent short instructions into a single packed

  89. instruction. &lsquo;<samp>--no-gstabs-packing</samp>&rsquo; turns instruction packing off if

  90. &lsquo;<samp>--gstabs</samp>&rsquo; is specified as well; &lsquo;<samp>--gstabs-packing</samp>&rsquo; (the

  91. default) turns instruction packing on even when &lsquo;<samp>--gstabs</samp>&rsquo; is

  92. specified.

  93. </p></dd>

  94. </dl>

  95. 

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  99. </body>

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