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<title>Using the GNU Compiler Collection (GCC): MicroBlaze Options</title>
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<a name="MicroBlaze-Options"></a>
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<div class="header">
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<p>
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Next: <a href="MIPS-Options.html#MIPS-Options" accesskey="n" rel="next">MIPS Options</a>, Previous: <a href="MeP-Options.html#MeP-Options" accesskey="p" rel="prev">MeP Options</a>, Up: <a href="Submodel-Options.html#Submodel-Options" accesskey="u" rel="up">Submodel Options</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="MicroBlaze-Options-1"></a>
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<h4 class="subsection">3.18.25 MicroBlaze Options</h4>
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<a name="index-MicroBlaze-Options"></a>
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<dl compact="compact">
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<dt><code>-msoft-float</code></dt>
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<dd><a name="index-msoft_002dfloat-5"></a>
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<p>Use software emulation for floating point (default).
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</p>
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</dd>
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<dt><code>-mhard-float</code></dt>
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<dd><a name="index-mhard_002dfloat-2"></a>
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<p>Use hardware floating-point instructions.
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</p>
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</dd>
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<dt><code>-mmemcpy</code></dt>
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<dd><a name="index-mmemcpy"></a>
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<p>Do not optimize block moves, use <code>memcpy</code>.
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</p>
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</dd>
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<dt><code>-mno-clearbss</code></dt>
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<dd><a name="index-mno_002dclearbss"></a>
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<p>This option is deprecated. Use <samp>-fno-zero-initialized-in-bss</samp> instead.
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</p>
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</dd>
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<dt><code>-mcpu=<var>cpu-type</var></code></dt>
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<dd><a name="index-mcpu_003d-2"></a>
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<p>Use features of, and schedule code for, the given CPU.
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Supported values are in the format ‘<samp>v<var>X</var>.<var>YY</var>.<var>Z</var></samp>’,
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where <var>X</var> is a major version, <var>YY</var> is the minor version, and
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<var>Z</var> is compatibility code. Example values are ‘<samp>v3.00.a</samp>’,
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‘<samp>v4.00.b</samp>’, ‘<samp>v5.00.a</samp>’, ‘<samp>v5.00.b</samp>’, ‘<samp>v5.00.b</samp>’, ‘<samp>v6.00.a</samp>’.
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</p>
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</dd>
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<dt><code>-mxl-soft-mul</code></dt>
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<dd><a name="index-mxl_002dsoft_002dmul"></a>
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<p>Use software multiply emulation (default).
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</p>
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</dd>
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<dt><code>-mxl-soft-div</code></dt>
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<dd><a name="index-mxl_002dsoft_002ddiv"></a>
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<p>Use software emulation for divides (default).
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</p>
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</dd>
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<dt><code>-mxl-barrel-shift</code></dt>
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<dd><a name="index-mxl_002dbarrel_002dshift"></a>
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<p>Use the hardware barrel shifter.
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</p>
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</dd>
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<dt><code>-mxl-pattern-compare</code></dt>
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<dd><a name="index-mxl_002dpattern_002dcompare"></a>
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<p>Use pattern compare instructions.
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</p>
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</dd>
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<dt><code>-msmall-divides</code></dt>
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<dd><a name="index-msmall_002ddivides"></a>
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<p>Use table lookup optimization for small signed integer divisions.
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</p>
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</dd>
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<dt><code>-mxl-stack-check</code></dt>
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<dd><a name="index-mxl_002dstack_002dcheck"></a>
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<p>This option is deprecated. Use <samp>-fstack-check</samp> instead.
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</p>
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</dd>
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<dt><code>-mxl-gp-opt</code></dt>
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<dd><a name="index-mxl_002dgp_002dopt"></a>
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<p>Use GP-relative <code>.sdata</code>/<code>.sbss</code> sections.
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</p>
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</dd>
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<dt><code>-mxl-multiply-high</code></dt>
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<dd><a name="index-mxl_002dmultiply_002dhigh"></a>
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<p>Use multiply high instructions for high part of 32x32 multiply.
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</p>
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</dd>
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<dt><code>-mxl-float-convert</code></dt>
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<dd><a name="index-mxl_002dfloat_002dconvert"></a>
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<p>Use hardware floating-point conversion instructions.
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</p>
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</dd>
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<dt><code>-mxl-float-sqrt</code></dt>
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<dd><a name="index-mxl_002dfloat_002dsqrt"></a>
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<p>Use hardware floating-point square root instruction.
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</p>
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</dd>
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<dt><code>-mbig-endian</code></dt>
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<dd><a name="index-mbig_002dendian-6"></a>
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<p>Generate code for a big-endian target.
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</p>
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</dd>
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<dt><code>-mlittle-endian</code></dt>
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<dd><a name="index-mlittle_002dendian-6"></a>
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<p>Generate code for a little-endian target.
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</p>
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</dd>
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<dt><code>-mxl-reorder</code></dt>
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<dd><a name="index-mxl_002dreorder"></a>
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<p>Use reorder instructions (swap and byte reversed load/store).
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</p>
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</dd>
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<dt><code>-mxl-mode-<var>app-model</var></code></dt>
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<dd><p>Select application model <var>app-model</var>. Valid models are
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</p><dl compact="compact">
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<dt>‘<samp>executable</samp>’</dt>
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<dd><p>normal executable (default), uses startup code <samp>crt0.o</samp>.
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</p>
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</dd>
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<dt>‘<samp>xmdstub</samp>’</dt>
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<dd><p>for use with Xilinx Microprocessor Debugger (XMD) based
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software intrusive debug agent called xmdstub. This uses startup file
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<samp>crt1.o</samp> and sets the start address of the program to 0x800.
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</p>
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</dd>
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<dt>‘<samp>bootstrap</samp>’</dt>
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<dd><p>for applications that are loaded using a bootloader.
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This model uses startup file <samp>crt2.o</samp> which does not contain a processor
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reset vector handler. This is suitable for transferring control on a
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processor reset to the bootloader rather than the application.
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</p>
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</dd>
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<dt>‘<samp>novectors</samp>’</dt>
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<dd><p>for applications that do not require any of the
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MicroBlaze vectors. This option may be useful for applications running
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within a monitoring application. This model uses <samp>crt3.o</samp> as a startup file.
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</p></dd>
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</dl>
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<p>Option <samp>-xl-mode-<var>app-model</var></samp> is a deprecated alias for
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<samp>-mxl-mode-<var>app-model</var></samp>.
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</p>
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</dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="MIPS-Options.html#MIPS-Options" accesskey="n" rel="next">MIPS Options</a>, Previous: <a href="MeP-Options.html#MeP-Options" accesskey="p" rel="prev">MeP Options</a>, Up: <a href="Submodel-Options.html#Submodel-Options" accesskey="u" rel="up">Submodel Options</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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