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| <h4 class="subsection">9.35.1 Options</h4> |
| |
| <p><a name="index-options-for-SPARC-1622"></a><a name="index-SPARC-options-1623"></a><a name="index-architectures_002c-SPARC-1624"></a><a name="index-SPARC-architectures-1625"></a>The SPARC chip family includes several successive versions, using the same |
| core instruction set, but including a few additional instructions at |
| each version. There are exceptions to this however. For details on what |
| instructions each variant supports, please see the chip's architecture |
| reference manual. |
| |
| <p>By default, <code>as</code> assumes the core instruction set (SPARC |
| v6), but “bumps” the architecture level as needed: it switches to |
| successively higher architectures as it encounters instructions that |
| only exist in the higher levels. |
| |
| <p>If not configured for SPARC v9 (<code>sparc64-*-*</code>) GAS will not bump |
| past sparclite by default, an option must be passed to enable the |
| v9 instructions. |
| |
| <p>GAS treats sparclite as being compatible with v8, unless an architecture |
| is explicitly requested. SPARC v9 is always incompatible with sparclite. |
| |
| <!-- The order here is the same as the order of enum sparc_opcode_arch_val --> |
| <!-- to give the user a sense of the order of the "bumping". --> |
| |
| <a name="index-g_t_002dAv6-1626"></a> |
| <a name="index-Av7-1627"></a> |
| <a name="index-g_t_002dAv8-1628"></a> |
| <a name="index-g_t_002dAsparclet-1629"></a> |
| <a name="index-g_t_002dAsparclite-1630"></a> |
| <a name="index-g_t_002dAv9-1631"></a> |
| <a name="index-g_t_002dAv9a-1632"></a> |
| <dl><dt><code>-Av6 | -Av7 | -Av8 | -Asparclet | -Asparclite</code><dt><code>-Av8plus | -Av8plusa | -Av9 | -Av9a</code><dd>Use one of the ‘<samp><span class="samp">-A</span></samp>’ options to select one of the SPARC |
| architectures explicitly. If you select an architecture explicitly, |
| <code>as</code> reports a fatal error if it encounters an instruction |
| or feature requiring an incompatible or higher level. |
| |
| <p>‘<samp><span class="samp">-Av8plus</span></samp>’ and ‘<samp><span class="samp">-Av8plusa</span></samp>’ select a 32 bit environment. |
| |
| <p>‘<samp><span class="samp">-Av9</span></samp>’ and ‘<samp><span class="samp">-Av9a</span></samp>’ select a 64 bit environment and are not |
| available unless GAS is explicitly configured with 64 bit environment |
| support. |
| |
| <p>‘<samp><span class="samp">-Av8plusa</span></samp>’ and ‘<samp><span class="samp">-Av9a</span></samp>’ enable the SPARC V9 instruction set with |
| UltraSPARC extensions. |
| |
| <br><dt><code>-xarch=v8plus | -xarch=v8plusa</code><dd>For compatibility with the SunOS v9 assembler. These options are |
| equivalent to -Av8plus and -Av8plusa, respectively. |
| |
| <br><dt><code>-bump</code><dd>Warn whenever it is necessary to switch to another level. |
| If an architecture level is explicitly requested, GAS will not issue |
| warnings until that level is reached, and will then bump the level |
| as required (except between incompatible levels). |
| |
| <br><dt><code>-32 | -64</code><dd>Select the word size, either 32 bits or 64 bits. |
| These options are only available with the ELF object file format, |
| and require that the necessary BFD support has been included. |
| </dl> |
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