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| <title>Using as: Xtensa Options</title> |
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| <a name="Xtensa-Options"></a> |
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| Next: <a href="Xtensa-Syntax.html#Xtensa-Syntax" accesskey="n" rel="next">Xtensa Syntax</a>, Up: <a href="Xtensa_002dDependent.html#Xtensa_002dDependent" accesskey="u" rel="up">Xtensa-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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| <a name="Command-Line-Options"></a> |
| <h4 class="subsection">9.53.1 Command Line Options</h4> |
| |
| <dl compact="compact"> |
| <dt><code>--text-section-literals | --no-text-section-literals</code></dt> |
| <dd><a name="index-_002d_002dtext_002dsection_002dliterals"></a> |
| <a name="index-_002d_002dno_002dtext_002dsection_002dliterals"></a> |
| <p>Control the treatment of literal pools. The default is |
| ‘<samp>--no-text-section-literals</samp>’, which places literals in |
| separate sections in the output file. This allows the literal pool to be |
| placed in a data RAM/ROM. With ‘<samp>--text-section-literals</samp>’, the |
| literals are interspersed in the text section in order to keep them as |
| close as possible to their references. This may be necessary for large |
| assembly files, where the literals would otherwise be out of range of the |
| <code>L32R</code> instructions in the text section. These options only affect |
| literals referenced via PC-relative <code>L32R</code> instructions; literals |
| for absolute mode <code>L32R</code> instructions are handled separately. |
| See <a href="Literal-Directive.html#Literal-Directive">literal</a>. |
| </p> |
| </dd> |
| <dt><code>--absolute-literals | --no-absolute-literals</code></dt> |
| <dd><a name="index-_002d_002dabsolute_002dliterals"></a> |
| <a name="index-_002d_002dno_002dabsolute_002dliterals"></a> |
| <p>Indicate to the assembler whether <code>L32R</code> instructions use absolute |
| or PC-relative addressing. If the processor includes the absolute |
| addressing option, the default is to use absolute <code>L32R</code> |
| relocations. Otherwise, only the PC-relative <code>L32R</code> relocations |
| can be used. |
| </p> |
| </dd> |
| <dt><code>--target-align | --no-target-align</code></dt> |
| <dd><a name="index-_002d_002dtarget_002dalign"></a> |
| <a name="index-_002d_002dno_002dtarget_002dalign"></a> |
| <p>Enable or disable automatic alignment to reduce branch penalties at some |
| expense in code size. See <a href="Xtensa-Automatic-Alignment.html#Xtensa-Automatic-Alignment">Automatic |
| Instruction Alignment</a>. This optimization is enabled by default. Note |
| that the assembler will always align instructions like <code>LOOP</code> that |
| have fixed alignment requirements. |
| </p> |
| </dd> |
| <dt><code>--longcalls | --no-longcalls</code></dt> |
| <dd><a name="index-_002d_002dlongcalls"></a> |
| <a name="index-_002d_002dno_002dlongcalls"></a> |
| <p>Enable or disable transformation of call instructions to allow calls |
| across a greater range of addresses. See <a href="Xtensa-Call-Relaxation.html#Xtensa-Call-Relaxation">Function Call Relaxation</a>. This option should be used when call |
| targets can potentially be out of range. It may degrade both code size |
| and performance, but the linker can generally optimize away the |
| unnecessary overhead when a call ends up within range. The default is |
| ‘<samp>--no-longcalls</samp>’. |
| </p> |
| </dd> |
| <dt><code>--transform | --no-transform</code></dt> |
| <dd><a name="index-_002d_002dtransform"></a> |
| <a name="index-_002d_002dno_002dtransform"></a> |
| <p>Enable or disable all assembler transformations of Xtensa instructions, |
| including both relaxation and optimization. The default is |
| ‘<samp>--transform</samp>’; ‘<samp>--no-transform</samp>’ should only be used in the |
| rare cases when the instructions must be exactly as specified in the |
| assembly source. Using ‘<samp>--no-transform</samp>’ causes out of range |
| instruction operands to be errors. |
| </p> |
| </dd> |
| <dt><code>--rename-section <var>oldname</var>=<var>newname</var></code></dt> |
| <dd><a name="index-_002d_002drename_002dsection"></a> |
| <p>Rename the <var>oldname</var> section to <var>newname</var>. This option can be used |
| multiple times to rename multiple sections. |
| </p> |
| </dd> |
| <dt><code>--trampolines | --no-trampolines</code></dt> |
| <dd><a name="index-_002d_002dtrampolines"></a> |
| <a name="index-_002d_002dno_002dtrampolines"></a> |
| <p>Enable or disable transformation of jump instructions to allow jumps |
| across a greater range of addresses. See <a href="Xtensa-Jump-Relaxation.html#Xtensa-Jump-Relaxation">Jump Trampolines</a>. This option should be used when jump targets can |
| potentially be out of range. In the absence of such jumps this option |
| does not affect code size or performance. The default is |
| ‘<samp>--trampolines</samp>’. |
| </p></dd> |
| </dl> |
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