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| Next: <a href="M68HC11_002dFloat.html#M68HC11_002dFloat" accesskey="n" rel="next">M68HC11-Float</a>, Previous: <a href="M68HC11_002dModifiers.html#M68HC11_002dModifiers" accesskey="p" rel="prev">M68HC11-Modifiers</a>, Up: <a href="M68HC11_002dDependent.html#M68HC11_002dDependent" accesskey="u" rel="up">M68HC11-Dependent</a> [<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> |
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| <a name="Assembler-Directives-2"></a> |
| <h4 class="subsection">9.24.4 Assembler Directives</h4> |
| |
| <a name="index-assembler-directives_002c-M68HC11"></a> |
| <a name="index-assembler-directives_002c-M68HC12"></a> |
| <a name="index-M68HC11-assembler-directives"></a> |
| <a name="index-M68HC12-assembler-directives"></a> |
| |
| <p>The 68HC11 and 68HC12 version of <code>as</code> have the following |
| specific assembler directives: |
| </p> |
| <dl compact="compact"> |
| <dt><code>.relax</code></dt> |
| <dd><a name="index-assembler-directive-_002erelax_002c-M68HC11"></a> |
| <a name="index-M68HC11-assembler-directive-_002erelax"></a> |
| <p>The relax directive is used by the ‘<samp>GNU Compiler</samp>’ to emit a specific |
| relocation to mark a group of instructions for linker relaxation. |
| The sequence of instructions within the group must be known to the linker |
| so that relaxation can be performed. |
| </p> |
| </dd> |
| <dt><code>.mode [mshort|mlong|mshort-double|mlong-double]</code></dt> |
| <dd><a name="index-assembler-directive-_002emode_002c-M68HC11"></a> |
| <a name="index-M68HC11-assembler-directive-_002emode"></a> |
| <p>This directive specifies the ABI. It overrides the ‘<samp>-mshort</samp>’, |
| ‘<samp>-mlong</samp>’, ‘<samp>-mshort-double</samp>’ and ‘<samp>-mlong-double</samp>’ options. |
| </p> |
| </dd> |
| <dt><code>.far <var>symbol</var></code></dt> |
| <dd><a name="index-assembler-directive-_002efar_002c-M68HC11"></a> |
| <a name="index-M68HC11-assembler-directive-_002efar"></a> |
| <p>This directive marks the symbol as a ‘<samp>far</samp>’ symbol meaning that it |
| uses a ‘<samp>call/rtc</samp>’ calling convention as opposed to ‘<samp>jsr/rts</samp>’. |
| During a final link, the linker will identify references to the ‘<samp>far</samp>’ |
| symbol and will verify the proper calling convention. |
| </p> |
| </dd> |
| <dt><code>.interrupt <var>symbol</var></code></dt> |
| <dd><a name="index-assembler-directive-_002einterrupt_002c-M68HC11"></a> |
| <a name="index-M68HC11-assembler-directive-_002einterrupt"></a> |
| <p>This directive marks the symbol as an interrupt entry point. |
| This information is then used by the debugger to correctly unwind the |
| frame across interrupts. |
| </p> |
| </dd> |
| <dt><code>.xrefb <var>symbol</var></code></dt> |
| <dd><a name="index-assembler-directive-_002exrefb_002c-M68HC11"></a> |
| <a name="index-M68HC11-assembler-directive-_002exrefb"></a> |
| <p>This directive is defined for compatibility with the |
| ‘<samp>Specification for Motorola 8 and 16-Bit Assembly Language Input |
| Standard</samp>’ and is ignored. |
| </p> |
| </dd> |
| </dl> |
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