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| <a name="PDP_002d11-Options-1"></a> |
| <h4 class="subsection">3.17.34 PDP-11 Options</h4> |
| <a name="index-PDP_002d11-Options"></a> |
| |
| <p>These options are defined for the PDP-11: |
| </p> |
| <dl compact="compact"> |
| <dt><code>-mfpu</code></dt> |
| <dd><a name="index-mfpu-1"></a> |
| <p>Use hardware FPP floating point. This is the default. (FIS floating |
| point on the PDP-11/40 is not supported.) |
| </p> |
| </dd> |
| <dt><code>-msoft-float</code></dt> |
| <dd><a name="index-msoft_002dfloat-8"></a> |
| <p>Do not use hardware floating point. |
| </p> |
| </dd> |
| <dt><code>-mac0</code></dt> |
| <dd><a name="index-mac0"></a> |
| <p>Return floating-point results in ac0 (fr0 in Unix assembler syntax). |
| </p> |
| </dd> |
| <dt><code>-mno-ac0</code></dt> |
| <dd><a name="index-mno_002dac0"></a> |
| <p>Return floating-point results in memory. This is the default. |
| </p> |
| </dd> |
| <dt><code>-m40</code></dt> |
| <dd><a name="index-m40"></a> |
| <p>Generate code for a PDP-11/40. |
| </p> |
| </dd> |
| <dt><code>-m45</code></dt> |
| <dd><a name="index-m45"></a> |
| <p>Generate code for a PDP-11/45. This is the default. |
| </p> |
| </dd> |
| <dt><code>-m10</code></dt> |
| <dd><a name="index-m10"></a> |
| <p>Generate code for a PDP-11/10. |
| </p> |
| </dd> |
| <dt><code>-mbcopy-builtin</code></dt> |
| <dd><a name="index-mbcopy_002dbuiltin"></a> |
| <p>Use inline <code>movmemhi</code> patterns for copying memory. This is the |
| default. |
| </p> |
| </dd> |
| <dt><code>-mbcopy</code></dt> |
| <dd><a name="index-mbcopy"></a> |
| <p>Do not use inline <code>movmemhi</code> patterns for copying memory. |
| </p> |
| </dd> |
| <dt><code>-mint16</code></dt> |
| <dt><code>-mno-int32</code></dt> |
| <dd><a name="index-mint16"></a> |
| <a name="index-mno_002dint32"></a> |
| <p>Use 16-bit <code>int</code>. This is the default. |
| </p> |
| </dd> |
| <dt><code>-mint32</code></dt> |
| <dt><code>-mno-int16</code></dt> |
| <dd><a name="index-mint32-2"></a> |
| <a name="index-mno_002dint16"></a> |
| <p>Use 32-bit <code>int</code>. |
| </p> |
| </dd> |
| <dt><code>-mfloat64</code></dt> |
| <dt><code>-mno-float32</code></dt> |
| <dd><a name="index-mfloat64"></a> |
| <a name="index-mno_002dfloat32"></a> |
| <p>Use 64-bit <code>float</code>. This is the default. |
| </p> |
| </dd> |
| <dt><code>-mfloat32</code></dt> |
| <dt><code>-mno-float64</code></dt> |
| <dd><a name="index-mfloat32"></a> |
| <a name="index-mno_002dfloat64"></a> |
| <p>Use 32-bit <code>float</code>. |
| </p> |
| </dd> |
| <dt><code>-mabshi</code></dt> |
| <dd><a name="index-mabshi"></a> |
| <p>Use <code>abshi2</code> pattern. This is the default. |
| </p> |
| </dd> |
| <dt><code>-mno-abshi</code></dt> |
| <dd><a name="index-mno_002dabshi"></a> |
| <p>Do not use <code>abshi2</code> pattern. |
| </p> |
| </dd> |
| <dt><code>-mbranch-expensive</code></dt> |
| <dd><a name="index-mbranch_002dexpensive"></a> |
| <p>Pretend that branches are expensive. This is for experimenting with |
| code generation only. |
| </p> |
| </dd> |
| <dt><code>-mbranch-cheap</code></dt> |
| <dd><a name="index-mbranch_002dcheap"></a> |
| <p>Do not pretend that branches are expensive. This is the default. |
| </p> |
| </dd> |
| <dt><code>-munix-asm</code></dt> |
| <dd><a name="index-munix_002dasm"></a> |
| <p>Use Unix assembler syntax. This is the default when configured for |
| ‘<samp>pdp11-*-bsd</samp>’. |
| </p> |
| </dd> |
| <dt><code>-mdec-asm</code></dt> |
| <dd><a name="index-mdec_002dasm"></a> |
| <p>Use DEC assembler syntax. This is the default when configured for any |
| PDP-11 target other than ‘<samp>pdp11-*-bsd</samp>’. |
| </p></dd> |
| </dl> |
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