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| <h4 class="subsection">3.17.28 MN10300 Options</h4> |
| |
| <p><a name="index-MN10300-options-1859"></a> |
| These <samp><span class="option">-m</span></samp> options are defined for Matsushita MN10300 architectures: |
| |
| <dl> |
| <dt><code>-mmult-bug</code><dd><a name="index-mmult_002dbug-1860"></a>Generate code to avoid bugs in the multiply instructions for the MN10300 |
| processors. This is the default. |
| |
| <br><dt><code>-mno-mult-bug</code><dd><a name="index-mno_002dmult_002dbug-1861"></a>Do not generate code to avoid bugs in the multiply instructions for the |
| MN10300 processors. |
| |
| <br><dt><code>-mam33</code><dd><a name="index-mam33-1862"></a>Generate code using features specific to the AM33 processor. |
| |
| <br><dt><code>-mno-am33</code><dd><a name="index-mno_002dam33-1863"></a>Do not generate code using features specific to the AM33 processor. This |
| is the default. |
| |
| <br><dt><code>-mam33-2</code><dd><a name="index-mam33_002d2-1864"></a>Generate code using features specific to the AM33/2.0 processor. |
| |
| <br><dt><code>-mam34</code><dd><a name="index-mam34-1865"></a>Generate code using features specific to the AM34 processor. |
| |
| <br><dt><code>-mtune=</code><var>cpu-type</var><dd><a name="index-mtune-1866"></a>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><span class="samp">mn10300</span></samp>’, ‘<samp><span class="samp">am33</span></samp>’, |
| ‘<samp><span class="samp">am33-2</span></samp>’ or ‘<samp><span class="samp">am34</span></samp>’. |
| |
| <br><dt><code>-mreturn-pointer-on-d0</code><dd><a name="index-mreturn_002dpointer_002don_002dd0-1867"></a>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><span class="option">-mno-return-pointer-on-d0</span></samp> to disable it. |
| |
| <br><dt><code>-mno-crt0</code><dd><a name="index-mno_002dcrt0-1868"></a>Do not link in the C run-time initialization object file. |
| |
| <br><dt><code>-mrelax</code><dd><a name="index-mrelax-1869"></a>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>This option makes symbolic debugging impossible. |
| |
| <br><dt><code>-mliw</code><dd><a name="index-mliw-1870"></a>Allow the compiler to generate <em>Long Instruction Word</em> |
| instructions if the target is the ‘<samp><span class="samp">AM33</span></samp>’ or later. This is the |
| default. This option defines the preprocessor macro ‘<samp><span class="samp">__LIW__</span></samp>’. |
| |
| <br><dt><code>-mnoliw</code><dd><a name="index-mnoliw-1871"></a>Do not allow the compiler to generate <em>Long Instruction Word</em> |
| instructions. This option defines the preprocessor macro |
| ‘<samp><span class="samp">__NO_LIW__</span></samp>’. |
| |
| <br><dt><code>-msetlb</code><dd><a name="index-msetlb-1872"></a>Allow the compiler to generate the <em>SETLB</em> and <em>Lcc</em> |
| instructions if the target is the ‘<samp><span class="samp">AM33</span></samp>’ or later. This is the |
| default. This option defines the preprocessor macro ‘<samp><span class="samp">__SETLB__</span></samp>’. |
| |
| <br><dt><code>-mnosetlb</code><dd><a name="index-mnosetlb-1873"></a>Do not allow the compiler to generate <em>SETLB</em> or <em>Lcc</em> |
| instructions. This option defines the preprocessor macro |
| ‘<samp><span class="samp">__NO_SETLB__</span></samp>’. |
| |
| </dl> |
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