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| <title>Using the GNU Compiler Collection (GCC): MN10300 Options</title> |
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| <h4 class="subsection">3.17.27 MN10300 Options</h4> |
| <a name="index-MN10300-options"></a> |
| |
| <p>These <samp>-m</samp> options are defined for Matsushita MN10300 architectures: |
| </p> |
| <dl compact="compact"> |
| <dt><code>-mmult-bug</code></dt> |
| <dd><a name="index-mmult_002dbug"></a> |
| <p>Generate code to avoid bugs in the multiply instructions for the MN10300 |
| processors. This is the default. |
| </p> |
| </dd> |
| <dt><code>-mno-mult-bug</code></dt> |
| <dd><a name="index-mno_002dmult_002dbug"></a> |
| <p>Do not generate code to avoid bugs in the multiply instructions for the |
| MN10300 processors. |
| </p> |
| </dd> |
| <dt><code>-mam33</code></dt> |
| <dd><a name="index-mam33"></a> |
| <p>Generate code using features specific to the AM33 processor. |
| </p> |
| </dd> |
| <dt><code>-mno-am33</code></dt> |
| <dd><a name="index-mno_002dam33"></a> |
| <p>Do not generate code using features specific to the AM33 processor. This |
| is the default. |
| </p> |
| </dd> |
| <dt><code>-mam33-2</code></dt> |
| <dd><a name="index-mam33_002d2"></a> |
| <p>Generate code using features specific to the AM33/2.0 processor. |
| </p> |
| </dd> |
| <dt><code>-mam34</code></dt> |
| <dd><a name="index-mam34"></a> |
| <p>Generate code using features specific to the AM34 processor. |
| </p> |
| </dd> |
| <dt><code>-mtune=<var>cpu-type</var></code></dt> |
| <dd><a name="index-mtune-9"></a> |
| <p>Use the timing characteristics of the indicated CPU type when |
| scheduling instructions. This does not change the targeted processor |
| type. The CPU type must be one of ‘<samp>mn10300</samp>’, ‘<samp>am33</samp>’, |
| ‘<samp>am33-2</samp>’ or ‘<samp>am34</samp>’. |
| </p> |
| </dd> |
| <dt><code>-mreturn-pointer-on-d0</code></dt> |
| <dd><a name="index-mreturn_002dpointer_002don_002dd0"></a> |
| <p>When generating a function that returns a pointer, return the pointer |
| in both <code>a0</code> and <code>d0</code>. Otherwise, the pointer is returned |
| only in <code>a0</code>, and attempts to call such functions without a prototype |
| result in errors. Note that this option is on by default; use |
| <samp>-mno-return-pointer-on-d0</samp> to disable it. |
| </p> |
| </dd> |
| <dt><code>-mno-crt0</code></dt> |
| <dd><a name="index-mno_002dcrt0"></a> |
| <p>Do not link in the C run-time initialization object file. |
| </p> |
| </dd> |
| <dt><code>-mrelax</code></dt> |
| <dd><a name="index-mrelax-2"></a> |
| <p>Indicate to the linker that it should perform a relaxation optimization pass |
| to shorten branches, calls and absolute memory addresses. This option only |
| has an effect when used on the command line for the final link step. |
| </p> |
| <p>This option makes symbolic debugging impossible. |
| </p> |
| </dd> |
| <dt><code>-mliw</code></dt> |
| <dd><a name="index-mliw"></a> |
| <p>Allow the compiler to generate <em>Long Instruction Word</em> |
| instructions if the target is the ‘<samp>AM33</samp>’ or later. This is the |
| default. This option defines the preprocessor macro <code>__LIW__</code>. |
| </p> |
| </dd> |
| <dt><code>-mnoliw</code></dt> |
| <dd><a name="index-mnoliw"></a> |
| <p>Do not allow the compiler to generate <em>Long Instruction Word</em> |
| instructions. This option defines the preprocessor macro |
| <code>__NO_LIW__</code>. |
| </p> |
| </dd> |
| <dt><code>-msetlb</code></dt> |
| <dd><a name="index-msetlb"></a> |
| <p>Allow the compiler to generate the <em>SETLB</em> and <em>Lcc</em> |
| instructions if the target is the ‘<samp>AM33</samp>’ or later. This is the |
| default. This option defines the preprocessor macro <code>__SETLB__</code>. |
| </p> |
| </dd> |
| <dt><code>-mnosetlb</code></dt> |
| <dd><a name="index-mnosetlb"></a> |
| <p>Do not allow the compiler to generate <em>SETLB</em> or <em>Lcc</em> |
| instructions. This option defines the preprocessor macro |
| <code>__NO_SETLB__</code>. |
| </p> |
| </dd> |
| </dl> |
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