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<title>PDP-11-Options (Using as)</title>

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<a name="PDP_002d11_002dOptions"></a>
<div class="header">
<p>
Next: <a href="PDP_002d11_002dPseudos.html#PDP_002d11_002dPseudos" accesskey="n" rel="next">PDP-11-Pseudos</a>, Up: <a href="PDP_002d11_002dDependent.html#PDP_002d11_002dDependent" accesskey="u" rel="up">PDP-11-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>
</div>
<hr>
<a name="Options-17"></a>
<h4 class="subsection">9.34.1 Options</h4>

<a name="index-options-for-PDP_002d11"></a>

<p>The PDP-11 version of <code>as</code> has a rich set of machine
dependent options.
</p>
<a name="Code-Generation-Options"></a>
<h4 class="subsubsection">9.34.1.1 Code Generation Options</h4>

<dl compact="compact">
<dd><a name="index-_002dmpic"></a>
<a name="index-_002dmno_002dpic"></a>
</dd>
<dt><code>-mpic | -mno-pic</code></dt>
<dd><p>Generate position-independent (or position-dependent) code.
</p>
<p>The default is to generate position-independent code.
</p></dd>
</dl>

<a name="Instruction-Set-Extension-Options"></a>
<h4 class="subsubsection">9.34.1.2 Instruction Set Extension Options</h4>

<p>These options enables or disables the use of extensions over the base
line instruction set as introduced by the first PDP-11 CPU: the KA11.
Most options come in two variants: a <code>-m</code><var>extension</var> that
enables <var>extension</var>, and a <code>-mno-</code><var>extension</var> that disables
<var>extension</var>.
</p>
<p>The default is to enable all extensions.
</p>
<dl compact="compact">
<dd><a name="index-_002dmall"></a>
<a name="index-_002dmall_002dextensions"></a>
</dd>
<dt><code>-mall | -mall-extensions</code></dt>
<dd><p>Enable all instruction set extensions.
</p>
<a name="index-_002dmno_002dextensions"></a>
</dd>
<dt><code>-mno-extensions</code></dt>
<dd><p>Disable all instruction set extensions.
</p>
<a name="index-_002dmcis"></a>
<a name="index-_002dmno_002dcis"></a>
</dd>
<dt><code>-mcis | -mno-cis</code></dt>
<dd><p>Enable (or disable) the use of the commercial instruction set, which
consists of these instructions: <code>ADDNI</code>, <code>ADDN</code>, <code>ADDPI</code>,
<code>ADDP</code>, <code>ASHNI</code>, <code>ASHN</code>, <code>ASHPI</code>, <code>ASHP</code>,
<code>CMPCI</code>, <code>CMPC</code>, <code>CMPNI</code>, <code>CMPN</code>, <code>CMPPI</code>,
<code>CMPP</code>, <code>CVTLNI</code>, <code>CVTLN</code>, <code>CVTLPI</code>, <code>CVTLP</code>,
<code>CVTNLI</code>, <code>CVTNL</code>, <code>CVTNPI</code>, <code>CVTNP</code>, <code>CVTPLI</code>,
<code>CVTPL</code>, <code>CVTPNI</code>, <code>CVTPN</code>, <code>DIVPI</code>, <code>DIVP</code>,
<code>L2DR</code>, <code>L3DR</code>, <code>LOCCI</code>, <code>LOCC</code>, <code>MATCI</code>,
<code>MATC</code>, <code>MOVCI</code>, <code>MOVC</code>, <code>MOVRCI</code>, <code>MOVRC</code>,
<code>MOVTCI</code>, <code>MOVTC</code>, <code>MULPI</code>, <code>MULP</code>, <code>SCANCI</code>,
<code>SCANC</code>, <code>SKPCI</code>, <code>SKPC</code>, <code>SPANCI</code>, <code>SPANC</code>,
<code>SUBNI</code>, <code>SUBN</code>, <code>SUBPI</code>, and <code>SUBP</code>.
</p>
<a name="index-_002dmcsm"></a>
<a name="index-_002dmno_002dcsm"></a>
</dd>
<dt><code>-mcsm | -mno-csm</code></dt>
<dd><p>Enable (or disable) the use of the <code>CSM</code> instruction.
</p>
<a name="index-_002dmeis"></a>
<a name="index-_002dmno_002deis"></a>
</dd>
<dt><code>-meis | -mno-eis</code></dt>
<dd><p>Enable (or disable) the use of the extended instruction set, which
consists of these instructions: <code>ASHC</code>, <code>ASH</code>, <code>DIV</code>,
<code>MARK</code>, <code>MUL</code>, <code>RTT</code>, <code>SOB</code> <code>SXT</code>, and
<code>XOR</code>.
</p>
<a name="index-_002dmfis"></a>
<a name="index-_002dmno_002dfis"></a>
<a name="index-_002dmkev11"></a>
<a name="index-_002dmkev11-1"></a>
<a name="index-_002dmno_002dkev11"></a>
</dd>
<dt><code>-mfis | -mkev11</code></dt>
<dt><code>-mno-fis | -mno-kev11</code></dt>
<dd><p>Enable (or disable) the use of the KEV11 floating-point instructions:
<code>FADD</code>, <code>FDIV</code>, <code>FMUL</code>, and <code>FSUB</code>.
</p>
<a name="index-_002dmfpp"></a>
<a name="index-_002dmno_002dfpp"></a>
<a name="index-_002dmfpu"></a>
<a name="index-_002dmno_002dfpu"></a>
<a name="index-_002dmfp_002d11"></a>
<a name="index-_002dmno_002dfp_002d11"></a>
</dd>
<dt><code>-mfpp | -mfpu | -mfp-11</code></dt>
<dt><code>-mno-fpp | -mno-fpu | -mno-fp-11</code></dt>
<dd><p>Enable (or disable) the use of FP-11 floating-point instructions:
<code>ABSF</code>, <code>ADDF</code>, <code>CFCC</code>, <code>CLRF</code>, <code>CMPF</code>,
<code>DIVF</code>, <code>LDCFF</code>, <code>LDCIF</code>, <code>LDEXP</code>, <code>LDF</code>,
<code>LDFPS</code>, <code>MODF</code>, <code>MULF</code>, <code>NEGF</code>, <code>SETD</code>,
<code>SETF</code>, <code>SETI</code>, <code>SETL</code>, <code>STCFF</code>, <code>STCFI</code>,
<code>STEXP</code>, <code>STF</code>, <code>STFPS</code>, <code>STST</code>, <code>SUBF</code>, and
<code>TSTF</code>.
</p>
<a name="index-_002dmlimited_002deis"></a>
<a name="index-_002dmno_002dlimited_002deis"></a>
</dd>
<dt><code>-mlimited-eis | -mno-limited-eis</code></dt>
<dd><p>Enable (or disable) the use of the limited extended instruction set:
<code>MARK</code>, <code>RTT</code>, <code>SOB</code>, <code>SXT</code>, and <code>XOR</code>.
</p>
<p>The -mno-limited-eis options also implies -mno-eis.
</p>
<a name="index-_002dmmfpt"></a>
<a name="index-_002dmno_002dmfpt"></a>
</dd>
<dt><code>-mmfpt | -mno-mfpt</code></dt>
<dd><p>Enable (or disable) the use of the <code>MFPT</code> instruction.
</p>
<a name="index-_002dmmutiproc"></a>
<a name="index-_002dmno_002dmutiproc"></a>
</dd>
<dt><code>-mmultiproc | -mno-multiproc</code></dt>
<dd><p>Enable (or disable) the use of multiprocessor instructions: <code>TSTSET</code> and
<code>WRTLCK</code>.
</p>
<a name="index-_002dmmxps"></a>
<a name="index-_002dmno_002dmxps"></a>
</dd>
<dt><code>-mmxps | -mno-mxps</code></dt>
<dd><p>Enable (or disable) the use of the <code>MFPS</code> and <code>MTPS</code> instructions.
</p>
<a name="index-_002dmspl"></a>
<a name="index-_002dmno_002dspl"></a>
</dd>
<dt><code>-mspl | -mno-spl</code></dt>
<dd><p>Enable (or disable) the use of the <code>SPL</code> instruction.
</p>
<a name="index-_002dmmicrocode"></a>
<a name="index-_002dmno_002dmicrocode"></a>
<p>Enable (or disable) the use of the microcode instructions: <code>LDUB</code>,
<code>MED</code>, and <code>XFC</code>.
</p></dd>
</dl>

<a name="CPU-Model-Options"></a>
<h4 class="subsubsection">9.34.1.3 CPU Model Options</h4>

<p>These options enable the instruction set extensions supported by a
particular CPU, and disables all other extensions.
</p>
<dl compact="compact">
<dd><a name="index-_002dmka11"></a>
</dd>
<dt><code>-mka11</code></dt>
<dd><p>KA11 CPU.  Base line instruction set only.
</p>
<a name="index-_002dmkb11"></a>
</dd>
<dt><code>-mkb11</code></dt>
<dd><p>KB11 CPU.  Enable extended instruction set and <code>SPL</code>.
</p>
<a name="index-_002dmkd11a"></a>
</dd>
<dt><code>-mkd11a</code></dt>
<dd><p>KD11-A CPU.  Enable limited extended instruction set.
</p>
<a name="index-_002dmkd11b"></a>
</dd>
<dt><code>-mkd11b</code></dt>
<dd><p>KD11-B CPU.  Base line instruction set only.
</p>
<a name="index-_002dmkd11d"></a>
</dd>
<dt><code>-mkd11d</code></dt>
<dd><p>KD11-D CPU.  Base line instruction set only.
</p>
<a name="index-_002dmkd11e"></a>
</dd>
<dt><code>-mkd11e</code></dt>
<dd><p>KD11-E CPU.  Enable extended instruction set, <code>MFPS</code>, and <code>MTPS</code>.
</p>
<a name="index-_002dmkd11f"></a>
<a name="index-_002dmkd11h"></a>
<a name="index-_002dmkd11q"></a>
</dd>
<dt><code>-mkd11f | -mkd11h | -mkd11q</code></dt>
<dd><p>KD11-F, KD11-H, or KD11-Q CPU.  Enable limited extended instruction set,
<code>MFPS</code>, and <code>MTPS</code>.
</p>
<a name="index-_002dmkd11k"></a>
</dd>
<dt><code>-mkd11k</code></dt>
<dd><p>KD11-K CPU.  Enable extended instruction set, <code>LDUB</code>, <code>MED</code>,
<code>MFPS</code>, <code>MFPT</code>, <code>MTPS</code>, and <code>XFC</code>.
</p>
<a name="index-_002dmkd11z"></a>
</dd>
<dt><code>-mkd11z</code></dt>
<dd><p>KD11-Z CPU.  Enable extended instruction set, <code>CSM</code>, <code>MFPS</code>,
<code>MFPT</code>, <code>MTPS</code>, and <code>SPL</code>.
</p>
<a name="index-_002dmf11"></a>
</dd>
<dt><code>-mf11</code></dt>
<dd><p>F11 CPU.  Enable extended instruction set, <code>MFPS</code>, <code>MFPT</code>, and
<code>MTPS</code>.
</p>
<a name="index-_002dmj11"></a>
</dd>
<dt><code>-mj11</code></dt>
<dd><p>J11 CPU.  Enable extended instruction set, <code>CSM</code>, <code>MFPS</code>,
<code>MFPT</code>, <code>MTPS</code>, <code>SPL</code>, <code>TSTSET</code>, and <code>WRTLCK</code>.
</p>
<a name="index-_002dmt11"></a>
</dd>
<dt><code>-mt11</code></dt>
<dd><p>T11 CPU.  Enable limited extended instruction set, <code>MFPS</code>, and
<code>MTPS</code>.
</p></dd>
</dl>

<a name="Machine-Model-Options"></a>
<h4 class="subsubsection">9.34.1.4 Machine Model Options</h4>

<p>These options enable the instruction set extensions supported by a
particular machine model, and disables all other extensions.
</p>
<dl compact="compact">
<dd><a name="index-_002dm11_002f03"></a>
</dd>
<dt><code>-m11/03</code></dt>
<dd><p>Same as <code>-mkd11f</code>.
</p>
<a name="index-_002dm11_002f04"></a>
</dd>
<dt><code>-m11/04</code></dt>
<dd><p>Same as <code>-mkd11d</code>.
</p>
<a name="index-_002dm11_002f05"></a>
<a name="index-_002dm11_002f10"></a>
</dd>
<dt><code>-m11/05 | -m11/10</code></dt>
<dd><p>Same as <code>-mkd11b</code>.
</p>
<a name="index-_002dm11_002f15"></a>
<a name="index-_002dm11_002f20"></a>
</dd>
<dt><code>-m11/15 | -m11/20</code></dt>
<dd><p>Same as <code>-mka11</code>.
</p>
<a name="index-_002dm11_002f21"></a>
</dd>
<dt><code>-m11/21</code></dt>
<dd><p>Same as <code>-mt11</code>.
</p>
<a name="index-_002dm11_002f23"></a>
<a name="index-_002dm11_002f24"></a>
</dd>
<dt><code>-m11/23 | -m11/24</code></dt>
<dd><p>Same as <code>-mf11</code>.
</p>
<a name="index-_002dm11_002f34"></a>
</dd>
<dt><code>-m11/34</code></dt>
<dd><p>Same as <code>-mkd11e</code>.
</p>
<a name="index-_002dm11_002f34a"></a>
</dd>
<dt><code>-m11/34a</code></dt>
<dd><p>Ame as <code>-mkd11e</code> <code>-mfpp</code>.
</p>
<a name="index-_002dm11_002f35"></a>
<a name="index-_002dm11_002f40"></a>
</dd>
<dt><code>-m11/35 | -m11/40</code></dt>
<dd><p>Same as <code>-mkd11a</code>.
</p>
<a name="index-_002dm11_002f44"></a>
</dd>
<dt><code>-m11/44</code></dt>
<dd><p>Same as <code>-mkd11z</code>.
</p>
<a name="index-_002dm11_002f45"></a>
<a name="index-_002dm11_002f50"></a>
<a name="index-_002dm11_002f55"></a>
<a name="index-_002dm11_002f70"></a>
</dd>
<dt><code>-m11/45 | -m11/50 | -m11/55 | -m11/70</code></dt>
<dd><p>Same as <code>-mkb11</code>.
</p>
<a name="index-_002dm11_002f53"></a>
<a name="index-_002dm11_002f73"></a>
<a name="index-_002dm11_002f83"></a>
<a name="index-_002dm11_002f84"></a>
<a name="index-_002dm11_002f93"></a>
<a name="index-_002dm11_002f94"></a>
</dd>
<dt><code>-m11/53 | -m11/73 | -m11/83 | -m11/84 | -m11/93 | -m11/94</code></dt>
<dd><p>Same as <code>-mj11</code>.
</p>
<a name="index-_002dm11_002f60"></a>
</dd>
<dt><code>-m11/60</code></dt>
<dd><p>Same as <code>-mkd11k</code>.
</p></dd>
</dl>

<hr>
<div class="header">
<p>
Next: <a href="PDP_002d11_002dPseudos.html#PDP_002d11_002dPseudos" accesskey="n" rel="next">PDP-11-Pseudos</a>, Up: <a href="PDP_002d11_002dDependent.html#PDP_002d11_002dDependent" accesskey="u" rel="up">PDP-11-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>
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