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131 lines
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<title>C-SKY Options - Using as</title>
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<meta name="description" content="Using as">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="C_002dSKY_002dDependent.html#C_002dSKY_002dDependent" title="C-SKY-Dependent">
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<link rel="next" href="C_002dSKY-Syntax.html#C_002dSKY-Syntax" title="C-SKY Syntax">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="C-SKY-Options"></a>
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<a name="C_002dSKY-Options"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="C_002dSKY-Syntax.html#C_002dSKY-Syntax">C-SKY Syntax</a>,
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Up: <a rel="up" accesskey="u" href="C_002dSKY_002dDependent.html#C_002dSKY_002dDependent">C-SKY-Dependent</a>
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<hr>
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</div>
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<h4 class="subsection">9.10.1 Options</h4>
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<p><a name="index-C_002dSKY-options-933"></a><a name="index-options-for-C_002dSKY-934"></a>
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<!-- man begin OPTIONS -->
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<a name="index-g_t_0040code_007bmarch_007d-command_002dline-option_002c-C_002dSKY-935"></a>
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<dl><dt><code>-march=</code><var>archname</var><dd>Assemble for architecture <var>archname</var>. The <samp><span class="option">--help</span></samp> option
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lists valid values for <var>archname</var>.
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<p><a name="index-g_t_0040code_007bmcpu_007d-command_002dline-option_002c-C_002dSKY-936"></a><br><dt><code>-mcpu=</code><var>cpuname</var><dd>Assemble for architecture <var>cpuname</var>. The <samp><span class="option">--help</span></samp> option
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lists valid values for <var>cpuname</var>.
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<p><a name="index-g_t_0040code_007bEL_007d-command_002dline-option_002c-C_002dSKY-937"></a><a name="index-g_t_0040code_007bmlittle_002dendian_007d-command_002dline-option_002c-C_002dSKY-938"></a><br><dt><code>-EL</code><dt><code>-mlittle-endian</code><dd>Generate little-endian output.
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<p><a name="index-g_t_0040code_007bEB_007d-command_002dline-option_002c-C_002dSKY-939"></a><a name="index-g_t_0040code_007bmbig_002dendian_007d-command_002dline-option_002c-C_002dSKY-940"></a><br><dt><code>-EB</code><dt><code>-mbig-endian</code><dd>Generate big-endian output.
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<p><a name="index-g_t_0040code_007bfpic_007d-command_002dline-option_002c-C_002dSKY-941"></a><a name="index-g_t_0040code_007bpic_007d-command_002dline-option_002c-C_002dSKY-942"></a><br><dt><code>-fpic</code><dt><code>-pic</code><dd>Generate position-independent code.
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<p><a name="index-g_t_0040code_007bmljump_007d-command_002dline-option_002c-C_002dSKY-943"></a><a name="index-g_t_0040code_007bmno_002dljump_007d-command_002dline-option_002c-C_002dSKY-944"></a><br><dt><code>-mljump</code><dt><code>-mno-ljump</code><dd>Enable/disable transformation of the short branch instructions
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<code>jbf</code>, <code>jbt</code>, and <code>jbr</code> to <code>jmpi</code>.
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This option is for V2 processors only.
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It is ignored on CK801 and CK802 targets, which do not support the <code>jmpi</code>
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instruction, and is enabled by default for other processors.
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<p><a name="index-g_t_0040code_007bmbranch_002dstub_007d-command_002dline-option_002c-C_002dSKY-945"></a><a name="index-g_t_0040code_007bmno_002dbranch_002dstub_007d-command_002dline-option_002c-C_002dSKY-946"></a><br><dt><code>-mbranch-stub</code><dt><code>-mno-branch-stub</code><dd>Pass through <code>R_CKCORE_PCREL_IMM26BY2</code> relocations for <code>bsr</code>
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instructions to the linker.
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<p>This option is only available for bare-metal C-SKY V2 ELF targets,
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where it is enabled by default. It cannot be used in code that will be
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dynamically linked against shared libraries.
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<p><a name="index-g_t_0040code_007bforce2bsr_007d-command_002dline-option_002c-C_002dSKY-947"></a><a name="index-g_t_0040code_007bmforce2bsr_007d-command_002dline-option_002c-C_002dSKY-948"></a><a name="index-g_t_0040code_007bno_002dforce2bsr_007d-command_002dline-option_002c-C_002dSKY-949"></a><a name="index-g_t_0040code_007bmno_002dforce2bsr_007d-command_002dline-option_002c-C_002dSKY-950"></a><br><dt><code>-force2bsr</code><dt><code>-mforce2bsr</code><dt><code>-no-force2bsr</code><dt><code>-mno-force2bsr</code><dd>Enable/disable transformation of <code>jbsr</code> instructions to <code>bsr</code>.
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This option is always enabled (and <samp><span class="option">-mno-force2bsr</span></samp> is ignored)
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for CK801/CK802 targets. It is also always enabled when
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<samp><span class="option">-mbranch-stub</span></samp> is in effect.
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<p><a name="index-g_t_0040code_007bjsri2bsr_007d-command_002dline-option_002c-C_002dSKY-951"></a><a name="index-g_t_0040code_007bmjsri2bsr_007d-command_002dline-option_002c-C_002dSKY-952"></a><a name="index-g_t_0040code_007bno_002djsri2bsr_007d-command_002dline-option_002c-C_002dSKY-953"></a><a name="index-g_t_0040code_007bmno_002djsri2bsr_007d-command_002dline-option_002c-C_002dSKY-954"></a><br><dt><code>-jsri2bsr</code><dt><code>-mjsri2bsr</code><dt><code>-no-jsri2bsr</code><dt><code>-mno-jsri2bsr</code><dd>Enable/disable transformation of <code>jsri</code> instructions to <code>bsr</code>.
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This option is enabled by default.
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<p><a name="index-g_t_0040code_007bmnolrw_007d-command_002dline-option_002c-C_002dSKY-955"></a><a name="index-g_t_0040code_007bmno_002dlrw_007d-command_002dline-option_002c-C_002dSKY-956"></a><br><dt><code>-mnolrw</code><dt><code>-mno-lrw</code><dd>Enable/disable transformation of <code>lrw</code> instructions into a
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<code>movih</code>/<code>ori</code> pair.
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<p><a name="index-g_t_0040code_007bmelrw_007d-command_002dline-option_002c-C_002dSKY-957"></a><a name="index-g_t_0040code_007bmno_002delrw_007d-command_002dline-option_002c-C_002dSKY-958"></a><br><dt><code>-melrw</code><dt><code>-mno-elrw</code><dd>Enable/disable extended <code>lrw</code> instructions.
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This option is enabled by default for CK800-series processors.
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<p><a name="index-g_t_0040code_007bmlaf_007d-command_002dline-option_002c-C_002dSKY-959"></a><a name="index-g_t_0040code_007bmliterals_002dafter_002dfunc_007d-command_002dline-option_002c-C_002dSKY-960"></a><a name="index-g_t_0040code_007bmno_002dlaf_007d-command_002dline-option_002c-C_002dSKY-961"></a><a name="index-g_t_0040code_007bmno_002dliterals_002dafter_002dfunc_007d-command_002dline-option_002c-C_002dSKY-962"></a><br><dt><code>-mlaf</code><dt><code>-mliterals-after-func</code><dt><code>-mno-laf</code><dt><code>-mno-literals-after-func</code><dd>Enable/disable placement of literal pools after each function.
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<p><a name="index-g_t_0040code_007bmlabr_007d-command_002dline-option_002c-C_002dSKY-963"></a><a name="index-g_t_0040code_007bmliterals_002dafter_002dbr_007d-command_002dline-option_002c-C_002dSKY-964"></a><a name="index-g_t_0040code_007bmno_002dlabr_007d-command_002dline-option_002c-C_002dSKY-965"></a><a name="index-g_t_0040code_007bmnoliterals_002dafter_002dbr_007d-command_002dline-option_002c-C_002dSKY-966"></a><br><dt><code>-mlabr</code><dt><code>-mliterals-after-br</code><dt><code>-mno-labr</code><dt><code>-mnoliterals-after-br</code><dd>Enable/disable placement of literal pools after unconditional branches.
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This option is enabled by default.
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<p><a name="index-g_t_0040code_007bmistack_007d-command_002dline-option_002c-C_002dSKY-967"></a><a name="index-g_t_0040code_007bmno_002distack_007d-command_002dline-option_002c-C_002dSKY-968"></a><br><dt><code>-mistack</code><dt><code>-mno-istack</code><dd>Enable/disable interrupt stack instructions. This option is enabled by
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default on CK801, CK802, and CK802 processors.
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</dl>
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<p>The following options explicitly enable certain optional instructions.
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These features are also enabled implicitly by using <code>-mcpu=</code> to specify
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a processor that supports it.
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<a name="index-g_t_0040code_007bmhard_002dfloat_007d-command_002dline-option_002c-C_002dSKY-969"></a>
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<dl><dt><code>-mhard-float</code><dd>Enable hard float instructions.
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<p><a name="index-g_t_0040code_007bmmp_007d-command_002dline-option_002c-C_002dSKY-970"></a><br><dt><code>-mmp</code><dd>Enable multiprocessor instructions.
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<p><a name="index-g_t_0040code_007bmcp_007d-command_002dline-option_002c-C_002dSKY-971"></a><br><dt><code>-mcp</code><dd>Enable coprocessor instructions.
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<p><a name="index-g_t_0040code_007bmcache_007d-command_002dline-option_002c-C_002dSKY-972"></a><br><dt><code>-mcache</code><dd>Enable cache prefetch instruction.
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<p><a name="index-g_t_0040code_007bmsecurity_007d-command_002dline-option_002c-C_002dSKY-973"></a><br><dt><code>-msecurity</code><dd>Enable C-SKY security instructions.
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<p><a name="index-g_t_0040code_007bmtrust_007d-command_002dline-option_002c-C_002dSKY-974"></a><br><dt><code>-mtrust</code><dd>Enable C-SKY trust instructions.
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<p><a name="index-g_t_0040code_007bmdsp_007d-command_002dline-option_002c-C_002dSKY-975"></a><br><dt><code>-mdsp</code><dd>Enable DSP instructions.
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<p><a name="index-g_t_0040code_007bmedsp_007d-command_002dline-option_002c-C_002dSKY-976"></a><br><dt><code>-medsp</code><dd>Enable enhanced DSP instructions.
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<p><a name="index-g_t_0040code_007bmvdsp_007d-command_002dline-option_002c-C_002dSKY-977"></a><br><dt><code>-mvdsp</code><dd>Enable vector DSP instructions.
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</dl>
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<!-- man end -->
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</body></html>
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