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<a name="M32R_002fD-Options"></a>
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<hr>
<a name="M32R_002fD-Options-1"></a>
<h4 class="subsection">3.19.24 M32R/D Options</h4>
<a name="index-M32R_002fD-options"></a>

<p>These <samp>-m</samp> options are defined for Renesas M32R/D architectures:
</p>
<dl compact="compact">
<dt><code>-m32r2</code></dt>
<dd><a name="index-m32r2"></a>
<p>Generate code for the M32R/2.
</p>
</dd>
<dt><code>-m32rx</code></dt>
<dd><a name="index-m32rx"></a>
<p>Generate code for the M32R/X.
</p>
</dd>
<dt><code>-m32r</code></dt>
<dd><a name="index-m32r"></a>
<p>Generate code for the M32R.  This is the default.
</p>
</dd>
<dt><code>-mmodel=small</code></dt>
<dd><a name="index-mmodel_003dsmall"></a>
<p>Assume all objects live in the lower 16MB of memory (so that their addresses
can be loaded with the <code>ld24</code> instruction), and assume all subroutines
are reachable with the <code>bl</code> instruction.
This is the default.
</p>
<p>The addressability of a particular object can be set with the
<code>model</code> attribute.
</p>
</dd>
<dt><code>-mmodel=medium</code></dt>
<dd><a name="index-mmodel_003dmedium"></a>
<p>Assume objects may be anywhere in the 32-bit address space (the compiler
generates <code>seth/add3</code> instructions to load their addresses), and
assume all subroutines are reachable with the <code>bl</code> instruction.
</p>
</dd>
<dt><code>-mmodel=large</code></dt>
<dd><a name="index-mmodel_003dlarge"></a>
<p>Assume objects may be anywhere in the 32-bit address space (the compiler
generates <code>seth/add3</code> instructions to load their addresses), and
assume subroutines may not be reachable with the <code>bl</code> instruction
(the compiler generates the much slower <code>seth/add3/jl</code>
instruction sequence).
</p>
</dd>
<dt><code>-msdata=none</code></dt>
<dd><a name="index-msdata_003dnone-1"></a>
<p>Disable use of the small data area.  Variables are put into
one of <code>.data</code>, <code>.bss</code>, or <code>.rodata</code> (unless the
<code>section</code> attribute has been specified).
This is the default.
</p>
<p>The small data area consists of sections <code>.sdata</code> and <code>.sbss</code>.
Objects may be explicitly put in the small data area with the
<code>section</code> attribute using one of these sections.
</p>
</dd>
<dt><code>-msdata=sdata</code></dt>
<dd><a name="index-msdata_003dsdata"></a>
<p>Put small global and static data in the small data area, but do not
generate special code to reference them.
</p>
</dd>
<dt><code>-msdata=use</code></dt>
<dd><a name="index-msdata_003duse"></a>
<p>Put small global and static data in the small data area, and generate
special instructions to reference them.
</p>
</dd>
<dt><code>-G <var>num</var></code></dt>
<dd><a name="index-G-1"></a>
<a name="index-smaller-data-references"></a>
<p>Put global and static objects less than or equal to <var>num</var> bytes
into the small data or BSS sections instead of the normal data or BSS
sections.  The default value of <var>num</var> is 8.
The <samp>-msdata</samp> option must be set to one of &lsquo;<samp>sdata</samp>&rsquo; or &lsquo;<samp>use</samp>&rsquo;
for this option to have any effect.
</p>
<p>All modules should be compiled with the same <samp>-G <var>num</var></samp> value.
Compiling with different values of <var>num</var> may or may not work; if it
doesn&rsquo;t the linker gives an error message&mdash;incorrect code is not
generated.
</p>
</dd>
<dt><code>-mdebug</code></dt>
<dd><a name="index-mdebug"></a>
<p>Makes the M32R-specific code in the compiler display some statistics
that might help in debugging programs.
</p>
</dd>
<dt><code>-malign-loops</code></dt>
<dd><a name="index-malign_002dloops"></a>
<p>Align all loops to a 32-byte boundary.
</p>
</dd>
<dt><code>-mno-align-loops</code></dt>
<dd><a name="index-mno_002dalign_002dloops"></a>
<p>Do not enforce a 32-byte alignment for loops.  This is the default.
</p>
</dd>
<dt><code>-missue-rate=<var>number</var></code></dt>
<dd><a name="index-missue_002drate_003dnumber"></a>
<p>Issue <var>number</var> instructions per cycle.  <var>number</var> can only be 1
or 2.
</p>
</dd>
<dt><code>-mbranch-cost=<var>number</var></code></dt>
<dd><a name="index-mbranch_002dcost_003dnumber"></a>
<p><var>number</var> can only be 1 or 2.  If it is 1 then branches are
preferred over conditional code, if it is 2, then the opposite applies.
</p>
</dd>
<dt><code>-mflush-trap=<var>number</var></code></dt>
<dd><a name="index-mflush_002dtrap_003dnumber"></a>
<p>Specifies the trap number to use to flush the cache.  The default is
12.  Valid numbers are between 0 and 15 inclusive.
</p>
</dd>
<dt><code>-mno-flush-trap</code></dt>
<dd><a name="index-mno_002dflush_002dtrap"></a>
<p>Specifies that the cache cannot be flushed by using a trap.
</p>
</dd>
<dt><code>-mflush-func=<var>name</var></code></dt>
<dd><a name="index-mflush_002dfunc_003dname"></a>
<p>Specifies the name of the operating system function to call to flush
the cache.  The default is &lsquo;<samp>_flush_cache</samp>&rsquo;, but a function call
is only used if a trap is not available.
</p>
</dd>
<dt><code>-mno-flush-func</code></dt>
<dd><a name="index-mno_002dflush_002dfunc"></a>
<p>Indicates that there is no OS function for flushing the cache.
</p>
</dd>
</dl>

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