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123 lines
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<title>MSP430 Options - Using as</title>
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This file documents the GNU Assembler "as".
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<div class="node">
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<a name="MSP430-Options"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="MSP430-Syntax.html#MSP430-Syntax">MSP430 Syntax</a>,
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Up: <a rel="up" accesskey="u" href="MSP430_002dDependent.html#MSP430_002dDependent">MSP430-Dependent</a>
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</div>
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<h4 class="subsection">9.29.1 Options</h4>
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<p><a name="index-MSP-430-options-_0028none_0029-1737"></a><a name="index-options-for-MSP430-_0028none_0029-1738"></a>
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<dl>
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<dt><code>-mmcu</code><dd>selects the mcu architecture. If the architecture is 430Xv2 then this
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also enables NOP generation unless the <samp><span class="option">-mN</span></samp> is also specified.
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<br><dt><code>-mcpu</code><dd>selects the cpu architecture. If the architecture is 430Xv2 then this
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also enables NOP generation unless the <samp><span class="option">-mN</span></samp> is also specified.
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<br><dt><code>-msilicon-errata=</code><var>name</var><code>[,</code><var>name</var><code>...]</code><dd>Implements a fixup for named silicon errata. Multiple silicon errata
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can be specified by multiple uses of the <samp><span class="option">-msilicon-errata</span></samp>
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option and/or by including the errata names, separated by commas, on
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an individual <samp><span class="option">-msilicon-errata</span></samp> option. Errata names
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currently recognised by the assembler are:
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<dl>
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<dt><code>cpu4</code><dd><code>PUSH #4</code> and <samp><span class="option">PUSH #8</span></samp> need longer encodings on the
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MSP430. This option is enabled by default, and cannot be disabled.
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<br><dt><code>cpu8</code><dd>Do not set the <code>SP</code> to an odd value.
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<br><dt><code>cpu11</code><dd>Do not update the <code>SR</code> and the <code>PC</code> in the same instruction.
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<br><dt><code>cpu12</code><dd>Do not use the <code>PC</code> in a <code>CMP</code> or <code>BIT</code> instruction.
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<br><dt><code>cpu13</code><dd>Do not use an arithmetic instruction to modify the <code>SR</code>.
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<br><dt><code>cpu19</code><dd>Insert <code>NOP</code> after <code>CPUOFF</code>.
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</dl>
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<br><dt><code>-msilicon-errata-warn=</code><var>name</var><code>[,</code><var>name</var><code>...]</code><dd>Like the <samp><span class="option">-msilicon-errata</span></samp> option except that instead of
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fixing the specified errata, a warning message is issued instead.
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This option can be used alongside <samp><span class="option">-msilicon-errata</span></samp> to
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generate messages whenever a problem is fixed, or on its own in order
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to inspect code for potential problems.
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<br><dt><code>-mP</code><dd>enables polymorph instructions handler.
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<br><dt><code>-mQ</code><dd>enables relaxation at assembly time. DANGEROUS!
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<br><dt><code>-ml</code><dd>indicates that the input uses the large code model.
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<br><dt><code>-mn</code><dd>enables the generation of a NOP instruction following any instruction
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that might change the interrupts enabled/disabled state. The
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pipelined nature of the MSP430 core means that any instruction that
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changes the interrupt state (<code>EINT</code>, <code>DINT</code>, <code>BIC #8,
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SR</code>, <code>BIS #8, SR</code> or <code>MOV.W <>, SR</code>) must be
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followed by a NOP instruction in order to ensure the correct
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processing of interrupts. By default it is up to the programmer to
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supply these NOP instructions, but this command-line option enables
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the automatic insertion by the assembler, if they are missing.
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<br><dt><code>-mN</code><dd>disables the generation of a NOP instruction following any instruction
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that might change the interrupts enabled/disabled state. This is the
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default behaviour.
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<br><dt><code>-my</code><dd>tells the assembler to generate a warning message if a NOP does not
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immediately follow an instruction that enables or disables
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interrupts. This is the default.
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<p>Note that this option can be stacked with the <samp><span class="option">-mn</span></samp> option so
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that the assembler will both warn about missing NOP instructions and
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then insert them automatically.
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<br><dt><code>-mY</code><dd>disables warnings about missing NOP instructions.
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<br><dt><code>-md</code><dd>mark the object file as one that requires data to copied from ROM to
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RAM at execution startup. Disabled by default.
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<br><dt><code>-mdata-region=</code><var>region</var><dd>Select the region data will be placed in.
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Region placement is performed by the compiler and linker. The only effect this
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option will have on the assembler is that if <var>upper</var> or <var>either</var> is
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selected, then the symbols to initialise high data and bss will be defined.
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Valid <var>region</var> values are:
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<dl>
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<dt><code>none</code><br><dt><code>lower</code><br><dt><code>upper</code><br><dt><code>either</code><dd></dl>
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</dl>
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