You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
140 lines
7.5 KiB
HTML
140 lines
7.5 KiB
HTML
4 years ago
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>M32R/D Options - Using the GNU Compiler Collection (GCC)</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="Using the GNU Compiler Collection (GCC)">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="up" href="Submodel-Options.html#Submodel-Options" title="Submodel Options">
|
||
|
|
<link rel="prev" href="M32C-Options.html#M32C-Options" title="M32C Options">
|
||
|
|
<link rel="next" href="M680x0-Options.html#M680x0-Options" title="M680x0 Options">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
Copyright (C) 1988-2015 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
||
|
|
any later version published by the Free Software Foundation; with the
|
||
|
|
Invariant Sections being ``Funding Free Software'', the Front-Cover
|
||
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
||
|
|
(see below). A copy of the license is included in the section entitled
|
||
|
|
``GNU Free Documentation License''.
|
||
|
|
|
||
|
|
(a) The FSF's Front-Cover Text is:
|
||
|
|
|
||
|
|
A GNU Manual
|
||
|
|
|
||
|
|
(b) The FSF's Back-Cover Text is:
|
||
|
|
|
||
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
||
|
|
software. Copies published by the Free Software Foundation raise
|
||
|
|
funds for GNU development.-->
|
||
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
||
|
|
<style type="text/css"><!--
|
||
|
|
pre.display { font-family:inherit }
|
||
|
|
pre.format { font-family:inherit }
|
||
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallexample { font-size:smaller }
|
||
|
|
pre.smalllisp { font-size:smaller }
|
||
|
|
span.sc { font-variant:small-caps }
|
||
|
|
span.roman { font-family:serif; font-weight:normal; }
|
||
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="node">
|
||
|
|
<a name="M32R%2fD-Options"></a>
|
||
|
|
<a name="M32R_002fD-Options"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="M680x0-Options.html#M680x0-Options">M680x0 Options</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="M32C-Options.html#M32C-Options">M32C Options</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="Submodel-Options.html#Submodel-Options">Submodel Options</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h4 class="subsection">3.17.20 M32R/D Options</h4>
|
||
|
|
|
||
|
|
<p><a name="index-M32R_002fD-options-1795"></a>
|
||
|
|
These <samp><span class="option">-m</span></samp> options are defined for Renesas M32R/D architectures:
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><code>-m32r2</code><dd><a name="index-m32r2-1796"></a>Generate code for the M32R/2.
|
||
|
|
|
||
|
|
<br><dt><code>-m32rx</code><dd><a name="index-m32rx-1797"></a>Generate code for the M32R/X.
|
||
|
|
|
||
|
|
<br><dt><code>-m32r</code><dd><a name="index-m32r-1798"></a>Generate code for the M32R. This is the default.
|
||
|
|
|
||
|
|
<br><dt><code>-mmodel=small</code><dd><a name="index-mmodel_003dsmall-1799"></a>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>The addressability of a particular object can be set with the
|
||
|
|
<code>model</code> attribute.
|
||
|
|
|
||
|
|
<br><dt><code>-mmodel=medium</code><dd><a name="index-mmodel_003dmedium-1800"></a>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.
|
||
|
|
|
||
|
|
<br><dt><code>-mmodel=large</code><dd><a name="index-mmodel_003dlarge-1801"></a>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).
|
||
|
|
|
||
|
|
<br><dt><code>-msdata=none</code><dd><a name="index-msdata_003dnone-1802"></a>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>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.
|
||
|
|
|
||
|
|
<br><dt><code>-msdata=sdata</code><dd><a name="index-msdata_003dsdata-1803"></a>Put small global and static data in the small data area, but do not
|
||
|
|
generate special code to reference them.
|
||
|
|
|
||
|
|
<br><dt><code>-msdata=use</code><dd><a name="index-msdata_003duse-1804"></a>Put small global and static data in the small data area, and generate
|
||
|
|
special instructions to reference them.
|
||
|
|
|
||
|
|
<br><dt><code>-G </code><var>num</var><dd><a name="index-G-1805"></a><a name="index-smaller-data-references-1806"></a>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><span class="option">-msdata</span></samp> option must be set to one of ‘<samp><span class="samp">sdata</span></samp>’ or ‘<samp><span class="samp">use</span></samp>’
|
||
|
|
for this option to have any effect.
|
||
|
|
|
||
|
|
<p>All modules should be compiled with the same <samp><span class="option">-G </span><var>num</var></samp> value.
|
||
|
|
Compiling with different values of <var>num</var> may or may not work; if it
|
||
|
|
doesn't the linker gives an error message—incorrect code is not
|
||
|
|
generated.
|
||
|
|
|
||
|
|
<br><dt><code>-mdebug</code><dd><a name="index-mdebug-1807"></a>Makes the M32R-specific code in the compiler display some statistics
|
||
|
|
that might help in debugging programs.
|
||
|
|
|
||
|
|
<br><dt><code>-malign-loops</code><dd><a name="index-malign_002dloops-1808"></a>Align all loops to a 32-byte boundary.
|
||
|
|
|
||
|
|
<br><dt><code>-mno-align-loops</code><dd><a name="index-mno_002dalign_002dloops-1809"></a>Do not enforce a 32-byte alignment for loops. This is the default.
|
||
|
|
|
||
|
|
<br><dt><code>-missue-rate=</code><var>number</var><dd><a name="index-missue_002drate_003d_0040var_007bnumber_007d-1810"></a>Issue <var>number</var> instructions per cycle. <var>number</var> can only be 1
|
||
|
|
or 2.
|
||
|
|
|
||
|
|
<br><dt><code>-mbranch-cost=</code><var>number</var><dd><a name="index-mbranch_002dcost_003d_0040var_007bnumber_007d-1811"></a><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.
|
||
|
|
|
||
|
|
<br><dt><code>-mflush-trap=</code><var>number</var><dd><a name="index-mflush_002dtrap_003d_0040var_007bnumber_007d-1812"></a>Specifies the trap number to use to flush the cache. The default is
|
||
|
|
12. Valid numbers are between 0 and 15 inclusive.
|
||
|
|
|
||
|
|
<br><dt><code>-mno-flush-trap</code><dd><a name="index-mno_002dflush_002dtrap-1813"></a>Specifies that the cache cannot be flushed by using a trap.
|
||
|
|
|
||
|
|
<br><dt><code>-mflush-func=</code><var>name</var><dd><a name="index-mflush_002dfunc_003d_0040var_007bname_007d-1814"></a>Specifies the name of the operating system function to call to flush
|
||
|
|
the cache. The default is ‘<samp><span class="samp">_flush_cache</span></samp>’, but a function call
|
||
|
|
is only used if a trap is not available.
|
||
|
|
|
||
|
|
<br><dt><code>-mno-flush-func</code><dd><a name="index-mno_002dflush_002dfunc-1815"></a>Indicates that there is no OS function for flushing the cache.
|
||
|
|
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|