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| <h4 class="subsection">9.34.1 RX Options</h4> |
| |
| <p><a name="index-options_002c-RX-1646"></a><a name="index-RX-options-1647"></a> |
| The Renesas RX port of <code>as</code> has a few target specfic |
| command line options: |
| |
| |
| <a name="index-g_t_0040samp_007b_002dm32bit_002ddoubles_007d-1648"></a> |
| <dl><dt><code>-m32bit-doubles</code><dd>This option controls the ABI and indicates to use a 32-bit float ABI. |
| It has no effect on the assembled instructions, but it does influence |
| the behaviour of the ‘<samp><span class="samp">.double</span></samp>’ pseudo-op. |
| This is the default. |
| |
| <p><a name="index-g_t_0040samp_007b_002dm64bit_002ddoubles_007d-1649"></a><br><dt><code>-m64bit-doubles</code><dd>This option controls the ABI and indicates to use a 64-bit float ABI. |
| It has no effect on the assembled instructions, but it does influence |
| the behaviour of the ‘<samp><span class="samp">.double</span></samp>’ pseudo-op. |
| |
| <p><a name="index-g_t_0040samp_007b_002dmbig_002dendian_007d-1650"></a><br><dt><code>-mbig-endian</code><dd>This option controls the ABI and indicates to use a big-endian data |
| ABI. It has no effect on the assembled instructions, but it does |
| influence the behaviour of the ‘<samp><span class="samp">.short</span></samp>’, ‘<samp><span class="samp">.hword</span></samp>’, ‘<samp><span class="samp">.int</span></samp>’, |
| ‘<samp><span class="samp">.word</span></samp>’, ‘<samp><span class="samp">.long</span></samp>’, ‘<samp><span class="samp">.quad</span></samp>’ and ‘<samp><span class="samp">.octa</span></samp>’ pseudo-ops. |
| |
| <p><a name="index-g_t_0040samp_007b_002dmlittle_002dendian_007d-1651"></a><br><dt><code>-mlittle-endian</code><dd>This option controls the ABI and indicates to use a little-endian data |
| ABI. It has no effect on the assembled instructions, but it does |
| influence the behaviour of the ‘<samp><span class="samp">.short</span></samp>’, ‘<samp><span class="samp">.hword</span></samp>’, ‘<samp><span class="samp">.int</span></samp>’, |
| ‘<samp><span class="samp">.word</span></samp>’, ‘<samp><span class="samp">.long</span></samp>’, ‘<samp><span class="samp">.quad</span></samp>’ and ‘<samp><span class="samp">.octa</span></samp>’ pseudo-ops. |
| This is the default. |
| |
| <p><a name="index-g_t_0040samp_007b_002dmuse_002dconventional_002dsection_002dnames_007d-1652"></a><br><dt><code>-muse-conventional-section-names</code><dd>This option controls the default names given to the code (.text), |
| initialised data (.data) and uninitialised data sections (.bss). |
| |
| <p><a name="index-g_t_0040samp_007b_002dmuse_002drenesas_002dsection_002dnames_007d-1653"></a><br><dt><code>-muse-renesas-section-names</code><dd>This option controls the default names given to the code (.P), |
| initialised data (.D_1) and uninitialised data sections (.B_1). |
| This is the default. |
| |
| <p><a name="index-g_t_0040samp_007b_002dmsmall_002ddata_002dlimit_007d-1654"></a><br><dt><code>-msmall-data-limit</code><dd>This option tells the assembler that the small data limit feature of |
| the RX port of GCC is being used. This results in the assembler |
| generating an undefined reference to a symbol called <code>__gp</code> for |
| use by the relocations that are needed to support the small data limit |
| feature. This option is not enabled by default as it would otherwise |
| pollute the symbol table. |
| |
| <p><a name="index-g_t_0040samp_007b_002dmpid_007d-1655"></a><br><dt><code>-mpid</code><dd>This option tells the assembler that the position independent data of the |
| RX port of GCC is being used. This results in the assembler |
| generating an undefined reference to a symbol called <code>__pid_base</code>, |
| and also setting the RX_PID flag bit in the e_flags field of the ELF |
| header of the object file. |
| |
| <p><a name="index-g_t_0040samp_007b_002dmint_002dregister_007d-1656"></a><br><dt><code>-mint-register=</code><var>num</var><dd>This option tells the assembler how many registers have been reserved |
| for use by interrupt handlers. This is needed in order to compute the |
| correct values for the <code>%gpreg</code> and <code>%pidreg</code> meta registers. |
| |
| </dl> |
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