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| <h4 class="subsection">9.20.1 M32R Options</h4> |
| |
| <p><a name="index-options_002c-M32R-1094"></a><a name="index-M32R-options-1095"></a> |
| The Renease M32R version of <code>as</code> has a few machine |
| dependent options: |
| |
| <dl> |
| <dt><code>-m32rx</code><dd><a name="index-g_t_0040samp_007b_002dm32rx_007d-option_002c-M32RX-1096"></a><a name="index-architecture-options_002c-M32RX-1097"></a><a name="index-M32R-architecture-options-1098"></a><code>as</code> can assemble code for several different members of the |
| Renesas M32R family. Normally the default is to assemble code for |
| the M32R microprocessor. This option may be used to change the default |
| to the M32RX microprocessor, which adds some more instructions to the |
| basic M32R instruction set, and some additional parameters to some of |
| the original instructions. |
| |
| <br><dt><code>-m32r2</code><dd><a name="index-g_t_0040samp_007b_002dm32rx_007d-option_002c-M32R2-1099"></a><a name="index-architecture-options_002c-M32R2-1100"></a><a name="index-M32R-architecture-options-1101"></a>This option changes the target processor to the the M32R2 |
| microprocessor. |
| |
| <br><dt><code>-m32r</code><dd><a name="index-g_t_0040samp_007b_002dm32r_007d-option_002c-M32R-1102"></a><a name="index-architecture-options_002c-M32R-1103"></a><a name="index-M32R-architecture-options-1104"></a>This option can be used to restore the assembler's default behaviour of |
| assembling for the M32R microprocessor. This can be useful if the |
| default has been changed by a previous command line option. |
| |
| <br><dt><code>-little</code><dd><a name="index-g_t_0040code_007b_002dlittle_007d-option_002c-M32R-1105"></a>This option tells the assembler to produce little-endian code and |
| data. The default is dependent upon how the toolchain was |
| configured. |
| |
| <br><dt><code>-EL</code><dd><a name="index-g_t_0040code_007b_002dEL_007d-option_002c-M32R-1106"></a>This is a synonym for <em>-little</em>. |
| |
| <br><dt><code>-big</code><dd><a name="index-g_t_0040code_007b_002dbig_007d-option_002c-M32R-1107"></a>This option tells the assembler to produce big-endian code and |
| data. |
| |
| <br><dt><code>-EB</code><dd><a name="index-g_t_0040code_007b_002dEB_007d-option_002c-M32R-1108"></a>This is a synonum for <em>-big</em>. |
| |
| <br><dt><code>-KPIC</code><dd><a name="index-g_t_0040code_007b_002dKPIC_007d-option_002c-M32R-1109"></a><a name="index-PIC-code-generation-for-M32R-1110"></a>This option specifies that the output of the assembler should be |
| marked as position-independent code (PIC). |
| |
| <br><dt><code>-parallel</code><dd><a name="index-g_t_0040code_007b_002dparallel_007d-option_002c-M32RX-1111"></a>This option tells the assembler to attempts to combine two sequential |
| instructions into a single, parallel instruction, where it is legal to |
| do so. |
| |
| <br><dt><code>-no-parallel</code><dd><a name="index-g_t_0040code_007b_002dno_002dparallel_007d-option_002c-M32RX-1112"></a>This option disables a previously enabled <em>-parallel</em> option. |
| |
| <br><dt><code>-no-bitinst</code><dd><a name="index-g_t_0040samp_007b_002dno_002dbitinst_007d_002c-M32R2-1113"></a>This option disables the support for the extended bit-field |
| instructions provided by the M32R2. If this support needs to be |
| re-enabled the <em>-bitinst</em> switch can be used to restore it. |
| |
| <br><dt><code>-O</code><dd><a name="index-g_t_0040code_007b_002dO_007d-option_002c-M32RX-1114"></a>This option tells the assembler to attempt to optimize the |
| instructions that it produces. This includes filling delay slots and |
| converting sequential instructions into parallel ones. This option |
| implies <em>-parallel</em>. |
| |
| <br><dt><code>-warn-explicit-parallel-conflicts</code><dd><a name="index-g_t_0040samp_007b_002dwarn_002dexplicit_002dparallel_002dconflicts_007d-option_002c-M32RX-1115"></a>Instructs <code>as</code> to produce warning messages when |
| questionable parallel instructions are encountered. This option is |
| enabled by default, but <code>gcc</code> disables it when it invokes |
| <code>as</code> directly. Questionable instructions are those whose |
| behaviour would be different if they were executed sequentially. For |
| example the code fragment ‘<samp><span class="samp">mv r1, r2 || mv r3, r1</span></samp>’ produces a |
| different result from ‘<samp><span class="samp">mv r1, r2 \n mv r3, r1</span></samp>’ since the former |
| moves r1 into r3 and then r2 into r1, whereas the later moves r2 into r1 |
| and r3. |
| |
| <br><dt><code>-Wp</code><dd><a name="index-g_t_0040samp_007b_002dWp_007d-option_002c-M32RX-1116"></a>This is a shorter synonym for the <em>-warn-explicit-parallel-conflicts</em> |
| option. |
| |
| <br><dt><code>-no-warn-explicit-parallel-conflicts</code><dd><a name="index-g_t_0040samp_007b_002dno_002dwarn_002dexplicit_002dparallel_002dconflicts_007d-option_002c-M32RX-1117"></a>Instructs <code>as</code> not to produce warning messages when |
| questionable parallel instructions are encountered. |
| |
| <br><dt><code>-Wnp</code><dd><a name="index-g_t_0040samp_007b_002dWnp_007d-option_002c-M32RX-1118"></a>This is a shorter synonym for the <em>-no-warn-explicit-parallel-conflicts</em> |
| option. |
| |
| <br><dt><code>-ignore-parallel-conflicts</code><dd><a name="index-g_t_0040samp_007b_002dignore_002dparallel_002dconflicts_007d-option_002c-M32RX-1119"></a>This option tells the assembler's to stop checking parallel |
| instructions for constraint violations. This ability is provided for |
| hardware vendors testing chip designs and should not be used under |
| normal circumstances. |
| |
| <br><dt><code>-no-ignore-parallel-conflicts</code><dd><a name="index-g_t_0040samp_007b_002dno_002dignore_002dparallel_002dconflicts_007d-option_002c-M32RX-1120"></a>This option restores the assembler's default behaviour of checking |
| parallel instructions to detect constraint violations. |
| |
| <br><dt><code>-Ip</code><dd><a name="index-g_t_0040samp_007b_002dIp_007d-option_002c-M32RX-1121"></a>This is a shorter synonym for the <em>-ignore-parallel-conflicts</em> |
| option. |
| |
| <br><dt><code>-nIp</code><dd><a name="index-g_t_0040samp_007b_002dnIp_007d-option_002c-M32RX-1122"></a>This is a shorter synonym for the <em>-no-ignore-parallel-conflicts</em> |
| option. |
| |
| <br><dt><code>-warn-unmatched-high</code><dd><a name="index-g_t_0040samp_007b_002dwarn_002dunmatched_002dhigh_007d-option_002c-M32R-1123"></a>This option tells the assembler to produce a warning message if a |
| <code>.high</code> pseudo op is encountered without a matching <code>.low</code> |
| pseudo op. The presence of such an unmatched pseudo op usually |
| indicates a programming error. |
| |
| <br><dt><code>-no-warn-unmatched-high</code><dd><a name="index-g_t_0040samp_007b_002dno_002dwarn_002dunmatched_002dhigh_007d-option_002c-M32R-1124"></a>Disables a previously enabled <em>-warn-unmatched-high</em> option. |
| |
| <br><dt><code>-Wuh</code><dd><a name="index-g_t_0040samp_007b_002dWuh_007d-option_002c-M32RX-1125"></a>This is a shorter synonym for the <em>-warn-unmatched-high</em> option. |
| |
| <br><dt><code>-Wnuh</code><dd><a name="index-g_t_0040samp_007b_002dWnuh_007d-option_002c-M32RX-1126"></a>This is a shorter synonym for the <em>-no-warn-unmatched-high</em> option. |
| |
| </dl> |
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