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| <title>Using as: M68HC11-Opts</title> |
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| <a name="M68HC11_002dOpts"></a> |
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| <p> |
| Next: <a href="M68HC11_002dSyntax.html#M68HC11_002dSyntax" accesskey="n" rel="next">M68HC11-Syntax</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> |
| </div> |
| <hr> |
| <a name="M68HC11-and-M68HC12-Options"></a> |
| <h4 class="subsection">9.24.1 M68HC11 and M68HC12 Options</h4> |
| |
| <a name="index-options_002c-M68HC11"></a> |
| <a name="index-M68HC11-options"></a> |
| <p>The Motorola 68HC11 and 68HC12 version of <code>as</code> have a few machine |
| dependent options. |
| </p> |
| <dl compact="compact"> |
| <dd> |
| <a name="index-_002dm68hc11"></a> |
| </dd> |
| <dt><code>-m68hc11</code></dt> |
| <dd><p>This option switches the assembler into the M68HC11 mode. In this mode, |
| the assembler only accepts 68HC11 operands and mnemonics. It produces |
| code for the 68HC11. |
| </p> |
| <a name="index-_002dm68hc12"></a> |
| </dd> |
| <dt><code>-m68hc12</code></dt> |
| <dd><p>This option switches the assembler into the M68HC12 mode. In this mode, |
| the assembler also accepts 68HC12 operands and mnemonics. It produces |
| code for the 68HC12. A few 68HC11 instructions are replaced by |
| some 68HC12 instructions as recommended by Motorola specifications. |
| </p> |
| <a name="index-_002dm68hcs12"></a> |
| </dd> |
| <dt><code>-m68hcs12</code></dt> |
| <dd><p>This option switches the assembler into the M68HCS12 mode. This mode is |
| similar to ‘<samp>-m68hc12</samp>’ but specifies to assemble for the 68HCS12 |
| series. The only difference is on the assembling of the ‘<samp>movb</samp>’ |
| and ‘<samp>movw</samp>’ instruction when a PC-relative operand is used. |
| </p> |
| <a name="index-_002dmm9s12x"></a> |
| </dd> |
| <dt><code>-mm9s12x</code></dt> |
| <dd><p>This option switches the assembler into the M9S12X mode. This mode is |
| similar to ‘<samp>-m68hc12</samp>’ but specifies to assemble for the S12X |
| series which is a superset of the HCS12. |
| </p> |
| <a name="index-_002dmm9s12xg"></a> |
| </dd> |
| <dt><code>-mm9s12xg</code></dt> |
| <dd><p>This option switches the assembler into the XGATE mode for the RISC |
| co-processor featured on some S12X-family chips. |
| </p> |
| <a name="index-_002d_002dxgate_002dramoffset"></a> |
| </dd> |
| <dt><code>--xgate-ramoffset</code></dt> |
| <dd><p>This option instructs the linker to offset RAM addresses from S12X address |
| space into XGATE address space. |
| </p> |
| <a name="index-_002dmshort"></a> |
| </dd> |
| <dt><code>-mshort</code></dt> |
| <dd><p>This option controls the ABI and indicates to use a 16-bit integer ABI. |
| It has no effect on the assembled instructions. |
| This is the default. |
| </p> |
| <a name="index-_002dmlong"></a> |
| </dd> |
| <dt><code>-mlong</code></dt> |
| <dd><p>This option controls the ABI and indicates to use a 32-bit integer ABI. |
| </p> |
| <a name="index-_002dmshort_002ddouble"></a> |
| </dd> |
| <dt><code>-mshort-double</code></dt> |
| <dd><p>This option controls the ABI and indicates to use a 32-bit float ABI. |
| This is the default. |
| </p> |
| <a name="index-_002dmlong_002ddouble"></a> |
| </dd> |
| <dt><code>-mlong-double</code></dt> |
| <dd><p>This option controls the ABI and indicates to use a 64-bit float ABI. |
| </p> |
| <a name="index-_002d_002dstrict_002ddirect_002dmode"></a> |
| </dd> |
| <dt><code>--strict-direct-mode</code></dt> |
| <dd><p>You can use the ‘<samp>--strict-direct-mode</samp>’ option to disable |
| the automatic translation of direct page mode addressing into |
| extended mode when the instruction does not support direct mode. |
| For example, the ‘<samp>clr</samp>’ instruction does not support direct page |
| mode addressing. When it is used with the direct page mode, |
| <code>as</code> will ignore it and generate an absolute addressing. |
| This option prevents <code>as</code> from doing this, and the wrong |
| usage of the direct page mode will raise an error. |
| </p> |
| <a name="index-_002d_002dshort_002dbranches"></a> |
| </dd> |
| <dt><code>--short-branches</code></dt> |
| <dd><p>The ‘<samp>--short-branches</samp>’ option turns off the translation of |
| relative branches into absolute branches when the branch offset is |
| out of range. By default <code>as</code> transforms the relative |
| branch (‘<samp>bsr</samp>’, ‘<samp>bgt</samp>’, ‘<samp>bge</samp>’, ‘<samp>beq</samp>’, ‘<samp>bne</samp>’, |
| ‘<samp>ble</samp>’, ‘<samp>blt</samp>’, ‘<samp>bhi</samp>’, ‘<samp>bcc</samp>’, ‘<samp>bls</samp>’, |
| ‘<samp>bcs</samp>’, ‘<samp>bmi</samp>’, ‘<samp>bvs</samp>’, ‘<samp>bvs</samp>’, ‘<samp>bra</samp>’) into |
| an absolute branch when the offset is out of the -128 .. 127 range. |
| In that case, the ‘<samp>bsr</samp>’ instruction is translated into a |
| ‘<samp>jsr</samp>’, the ‘<samp>bra</samp>’ instruction is translated into a |
| ‘<samp>jmp</samp>’ and the conditional branches instructions are inverted and |
| followed by a ‘<samp>jmp</samp>’. This option disables these translations |
| and <code>as</code> will generate an error if a relative branch |
| is out of range. This option does not affect the optimization |
| associated to the ‘<samp>jbra</samp>’, ‘<samp>jbsr</samp>’ and ‘<samp>jbXX</samp>’ pseudo opcodes. |
| </p> |
| <a name="index-_002d_002dforce_002dlong_002dbranches"></a> |
| </dd> |
| <dt><code>--force-long-branches</code></dt> |
| <dd><p>The ‘<samp>--force-long-branches</samp>’ option forces the translation of |
| relative branches into absolute branches. This option does not affect |
| the optimization associated to the ‘<samp>jbra</samp>’, ‘<samp>jbsr</samp>’ and |
| ‘<samp>jbXX</samp>’ pseudo opcodes. |
| </p> |
| <a name="index-_002d_002dprint_002dinsn_002dsyntax"></a> |
| </dd> |
| <dt><code>--print-insn-syntax</code></dt> |
| <dd><p>You can use the ‘<samp>--print-insn-syntax</samp>’ option to obtain the |
| syntax description of the instruction when an error is detected. |
| </p> |
| <a name="index-_002d_002dprint_002dopcodes"></a> |
| </dd> |
| <dt><code>--print-opcodes</code></dt> |
| <dd><p>The ‘<samp>--print-opcodes</samp>’ option prints the list of all the |
| instructions with their syntax. The first item of each line |
| represents the instruction name and the rest of the line indicates |
| the possible operands for that instruction. The list is printed |
| in alphabetical order. Once the list is printed <code>as</code> |
| exits. |
| </p> |
| <a name="index-_002d_002dgenerate_002dexample"></a> |
| </dd> |
| <dt><code>--generate-example</code></dt> |
| <dd><p>The ‘<samp>--generate-example</samp>’ option is similar to ‘<samp>--print-opcodes</samp>’ |
| but it generates an example for each instruction instead. |
| </p></dd> |
| </dl> |
| |
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| Next: <a href="M68HC11_002dSyntax.html#M68HC11_002dSyntax" accesskey="n" rel="next">M68HC11-Syntax</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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