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| <h4 class="subsection">3.17.22 M68hc1x Options</h4> |
| |
| <p><a name="index-M68hc1x-options-1495"></a> |
| These are the ‘<samp><span class="samp">-m</span></samp>’ options defined for the 68hc11 and 68hc12 |
| microcontrollers. The default values for these options depends on |
| which style of microcontroller was selected when the compiler was configured; |
| the defaults for the most common choices are given below. |
| |
| <dl> |
| <dt><code>-m6811</code><dt><code>-m68hc11</code><dd><a name="index-m6811-1496"></a><a name="index-m68hc11-1497"></a>Generate output for a 68HC11. This is the default |
| when the compiler is configured for 68HC11-based systems. |
| |
| <br><dt><code>-m6812</code><dt><code>-m68hc12</code><dd><a name="index-m6812-1498"></a><a name="index-m68hc12-1499"></a>Generate output for a 68HC12. This is the default |
| when the compiler is configured for 68HC12-based systems. |
| |
| <br><dt><code>-m68S12</code><dt><code>-m68hcs12</code><dd><a name="index-m68S12-1500"></a><a name="index-m68hcs12-1501"></a>Generate output for a 68HCS12. |
| |
| <br><dt><code>-mauto-incdec</code><dd><a name="index-mauto_002dincdec-1502"></a>Enable the use of 68HC12 pre and post auto-increment and auto-decrement |
| addressing modes. |
| |
| <br><dt><code>-minmax</code><dt><code>-mnominmax</code><dd><a name="index-minmax-1503"></a><a name="index-mnominmax-1504"></a>Enable the use of 68HC12 min and max instructions. |
| |
| <br><dt><code>-mlong-calls</code><dt><code>-mno-long-calls</code><dd><a name="index-mlong_002dcalls-1505"></a><a name="index-mno_002dlong_002dcalls-1506"></a>Treat all calls as being far away (near). If calls are assumed to be |
| far away, the compiler will use the <code>call</code> instruction to |
| call a function and the <code>rtc</code> instruction for returning. |
| |
| <br><dt><code>-mshort</code><dd><a name="index-mshort-1507"></a>Consider type <code>int</code> to be 16 bits wide, like <code>short int</code>. |
| |
| <br><dt><code>-msoft-reg-count=</code><var>count</var><dd><a name="index-msoft_002dreg_002dcount-1508"></a>Specify the number of pseudo-soft registers which are used for the |
| code generation. The maximum number is 32. Using more pseudo-soft |
| register may or may not result in better code depending on the program. |
| The default is 4 for 68HC11 and 2 for 68HC12. |
| |
| </dl> |
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