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<title>Using as: MSP430 Options</title>

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<a name="MSP430-Options"></a>
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<p>
Next: <a href="MSP430-Syntax.html#MSP430-Syntax" accesskey="n" rel="next">MSP430 Syntax</a>, Up: <a href="MSP430_002dDependent.html#MSP430_002dDependent" accesskey="u" rel="up">MSP430-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-14"></a>
<h4 class="subsection">9.29.1 Options</h4>
<a name="index-MSP-430-options-_0028none_0029"></a>
<a name="index-options-for-MSP430-_0028none_0029"></a>
<dl compact="compact">
<dt><code>-mmcu</code></dt>
<dd><p>selects the mcu architecture.  If the architecture is 430Xv2 then this
also enables NOP generation unless the <samp>-mN</samp> is also specified.
</p>
</dd>
<dt><code>-mcpu</code></dt>
<dd><p>selects the cpu architecture.  If the architecture is 430Xv2 then this
also enables NOP generation unless the <samp>-mN</samp> is also specified.
</p>
</dd>
<dt><code>-msilicon-errata=<var>name</var>[,<var>name</var>&hellip;]</code></dt>
<dd><p>Implements a fixup for named silicon errata.  Multiple silicon errata
can be specified by multiple uses of the <samp>-msilicon-errata</samp>
option and/or by including the errata names, separated by commas, on
an individual <samp>-msilicon-errata</samp> option.  Errata names
currently recognised by the assembler are:
</p>
<dl compact="compact">
<dt><code>cpu4</code></dt>
<dd><p><code>PUSH #4</code> and <samp>PUSH #8</samp> need longer encodings on the
MSP430.  This option is enabled by default, and cannot be disabled.
</p></dd>
<dt><code>cpu8</code></dt>
<dd><p>Do not set the <code>SP</code> to an odd value.
</p></dd>
<dt><code>cpu11</code></dt>
<dd><p>Do not update the <code>SR</code> and the <code>PC</code> in the same instruction.
</p></dd>
<dt><code>cpu12</code></dt>
<dd><p>Do not use the <code>PC</code> in a <code>CMP</code> or <code>BIT</code> instruction.
</p></dd>
<dt><code>cpu13</code></dt>
<dd><p>Do not use an arithmetic instruction to modify the <code>SR</code>.
</p></dd>
<dt><code>cpu19</code></dt>
<dd><p>Insert <code>NOP</code> after <code>CPUOFF</code>.
</p></dd>
</dl>

</dd>
<dt><code>-msilicon-errata-warn=<var>name</var>[,<var>name</var>&hellip;]</code></dt>
<dd><p>Like the <samp>-msilicon-errata</samp> option except that instead of
fixing the specified errata, a warning message is issued instead.
This option can be used alongside <samp>-msilicon-errata</samp> to
generate messages whenever a problem is fixed, or on its own in order
to inspect code for potential problems.
</p>
</dd>
<dt><code>-mP</code></dt>
<dd><p>enables polymorph instructions handler.
</p>
</dd>
<dt><code>-mQ</code></dt>
<dd><p>enables relaxation at assembly time. DANGEROUS!
</p>
</dd>
<dt><code>-ml</code></dt>
<dd><p>indicates that the input uses the large code model.
</p>
</dd>
<dt><code>-mn</code></dt>
<dd><p>enables the generation of a NOP instruction following any instruction
that might change the interrupts enabled/disabled state.  The
pipelined nature of the MSP430 core means that any instruction that
changes the interrupt state (<code>EINT</code>, <code>DINT</code>, <code>BIC #8,
SR</code>, <code>BIS #8, SR</code> or <code>MOV.W &lt;&gt;, SR</code>) must be 
followed by a NOP instruction in order to ensure the correct
processing of interrupts.  By default it is up to the programmer to
supply these NOP instructions, but this command line option enables
the automatic insertion by the assembler, if they are missing.
</p>
</dd>
<dt><code>-mN</code></dt>
<dd><p>disables the generation of a NOP instruction following any instruction
that might change the interrupts enabled/disabled state.  This is the
default behaviour.
</p>
</dd>
<dt><code>-my</code></dt>
<dd><p>tells the assembler to generate a warning message if a NOP does not
immediately forllow an instruction that enables or disables
interrupts.  This is the default.
</p>
<p>Note that this option can be stacked with the <samp>-mn</samp> option so
that the assembler will both warn about missing NOP instructions and
then insert them automatically.
</p>
</dd>
<dt><code>-mY</code></dt>
<dd><p>disables warnings about missing NOP instructions.
</p>
</dd>
<dt><code>-md</code></dt>
<dd><p>mark the object file as one that requires data to copied from ROM to
RAM at execution startup.  Disabled by default.
</p>
</dd>
</dl>

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