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274 lines
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274 lines
13 KiB
HTML
4 years ago
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<title>FRV Options - Using the GNU Compiler Collection (GCC)</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC)">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Submodel-Options.html#Submodel-Options" title="Submodel Options">
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<link rel="prev" href="FR30-Options.html#FR30-Options" title="FR30 Options">
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<link rel="next" href="GNU_002fLinux-Options.html#GNU_002fLinux-Options" title="GNU/Linux Options">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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Copyright (C) 1988-2015 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 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being ``Funding Free Software'', the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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``GNU Free Documentation License''.
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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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="FRV-Options"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="GNU_002fLinux-Options.html#GNU_002fLinux-Options">GNU/Linux Options</a>,
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Previous: <a rel="previous" accesskey="p" href="FR30-Options.html#FR30-Options">FR30 Options</a>,
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Up: <a rel="up" accesskey="u" href="Submodel-Options.html#Submodel-Options">Submodel Options</a>
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<hr>
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</div>
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<h4 class="subsection">3.17.13 FRV Options</h4>
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<p><a name="index-FRV-Options-1636"></a>
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<dl>
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<dt><code>-mgpr-32</code><dd><a name="index-mgpr_002d32-1637"></a>
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Only use the first 32 general-purpose registers.
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<br><dt><code>-mgpr-64</code><dd><a name="index-mgpr_002d64-1638"></a>
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Use all 64 general-purpose registers.
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<br><dt><code>-mfpr-32</code><dd><a name="index-mfpr_002d32-1639"></a>
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Use only the first 32 floating-point registers.
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<br><dt><code>-mfpr-64</code><dd><a name="index-mfpr_002d64-1640"></a>
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Use all 64 floating-point registers.
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<br><dt><code>-mhard-float</code><dd><a name="index-mhard_002dfloat-1641"></a>
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Use hardware instructions for floating-point operations.
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<br><dt><code>-msoft-float</code><dd><a name="index-msoft_002dfloat-1642"></a>
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Use library routines for floating-point operations.
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<br><dt><code>-malloc-cc</code><dd><a name="index-malloc_002dcc-1643"></a>
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Dynamically allocate condition code registers.
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<br><dt><code>-mfixed-cc</code><dd><a name="index-mfixed_002dcc-1644"></a>
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Do not try to dynamically allocate condition code registers, only
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use <code>icc0</code> and <code>fcc0</code>.
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<br><dt><code>-mdword</code><dd><a name="index-mdword-1645"></a>
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Change ABI to use double word insns.
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<br><dt><code>-mno-dword</code><dd><a name="index-mno_002ddword-1646"></a>
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Do not use double word instructions.
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<br><dt><code>-mdouble</code><dd><a name="index-mdouble-1647"></a>
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Use floating-point double instructions.
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<br><dt><code>-mno-double</code><dd><a name="index-mno_002ddouble-1648"></a>
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Do not use floating-point double instructions.
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<br><dt><code>-mmedia</code><dd><a name="index-mmedia-1649"></a>
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Use media instructions.
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<br><dt><code>-mno-media</code><dd><a name="index-mno_002dmedia-1650"></a>
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Do not use media instructions.
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<br><dt><code>-mmuladd</code><dd><a name="index-mmuladd-1651"></a>
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Use multiply and add/subtract instructions.
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<br><dt><code>-mno-muladd</code><dd><a name="index-mno_002dmuladd-1652"></a>
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Do not use multiply and add/subtract instructions.
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<br><dt><code>-mfdpic</code><dd><a name="index-mfdpic-1653"></a>
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Select the FDPIC ABI, which uses function descriptors to represent
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pointers to functions. Without any PIC/PIE-related options, it
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implies <samp><span class="option">-fPIE</span></samp>. With <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fpie</span></samp>, it
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assumes GOT entries and small data are within a 12-bit range from the
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GOT base address; with <samp><span class="option">-fPIC</span></samp> or <samp><span class="option">-fPIE</span></samp>, GOT offsets
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are computed with 32 bits.
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With a ‘<samp><span class="samp">bfin-elf</span></samp>’ target, this option implies <samp><span class="option">-msim</span></samp>.
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<br><dt><code>-minline-plt</code><dd><a name="index-minline_002dplt-1654"></a>
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Enable inlining of PLT entries in function calls to functions that are
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not known to bind locally. It has no effect without <samp><span class="option">-mfdpic</span></samp>.
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It's enabled by default if optimizing for speed and compiling for
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shared libraries (i.e., <samp><span class="option">-fPIC</span></samp> or <samp><span class="option">-fpic</span></samp>), or when an
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optimization option such as <samp><span class="option">-O3</span></samp> or above is present in the
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command line.
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<br><dt><code>-mTLS</code><dd><a name="index-mTLS-1655"></a>
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Assume a large TLS segment when generating thread-local code.
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<br><dt><code>-mtls</code><dd><a name="index-mtls-1656"></a>
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Do not assume a large TLS segment when generating thread-local code.
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<br><dt><code>-mgprel-ro</code><dd><a name="index-mgprel_002dro-1657"></a>
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Enable the use of <code>GPREL</code> relocations in the FDPIC ABI for data
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that is known to be in read-only sections. It's enabled by default,
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except for <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fpie</span></samp>: even though it may help
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make the global offset table smaller, it trades 1 instruction for 4.
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With <samp><span class="option">-fPIC</span></samp> or <samp><span class="option">-fPIE</span></samp>, it trades 3 instructions for 4,
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one of which may be shared by multiple symbols, and it avoids the need
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for a GOT entry for the referenced symbol, so it's more likely to be a
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win. If it is not, <samp><span class="option">-mno-gprel-ro</span></samp> can be used to disable it.
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<br><dt><code>-multilib-library-pic</code><dd><a name="index-multilib_002dlibrary_002dpic-1658"></a>
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Link with the (library, not FD) pic libraries. It's implied by
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<samp><span class="option">-mlibrary-pic</span></samp>, as well as by <samp><span class="option">-fPIC</span></samp> and
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<samp><span class="option">-fpic</span></samp> without <samp><span class="option">-mfdpic</span></samp>. You should never have to use
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it explicitly.
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<br><dt><code>-mlinked-fp</code><dd><a name="index-mlinked_002dfp-1659"></a>
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Follow the EABI requirement of always creating a frame pointer whenever
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a stack frame is allocated. This option is enabled by default and can
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be disabled with <samp><span class="option">-mno-linked-fp</span></samp>.
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<br><dt><code>-mlong-calls</code><dd><a name="index-mlong_002dcalls-1660"></a>
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Use indirect addressing to call functions outside the current
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compilation unit. This allows the functions to be placed anywhere
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within the 32-bit address space.
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<br><dt><code>-malign-labels</code><dd><a name="index-malign_002dlabels-1661"></a>
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Try to align labels to an 8-byte boundary by inserting NOPs into the
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previous packet. This option only has an effect when VLIW packing
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is enabled. It doesn't create new packets; it merely adds NOPs to
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existing ones.
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<br><dt><code>-mlibrary-pic</code><dd><a name="index-mlibrary_002dpic-1662"></a>
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Generate position-independent EABI code.
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<br><dt><code>-macc-4</code><dd><a name="index-macc_002d4-1663"></a>
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Use only the first four media accumulator registers.
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<br><dt><code>-macc-8</code><dd><a name="index-macc_002d8-1664"></a>
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Use all eight media accumulator registers.
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<br><dt><code>-mpack</code><dd><a name="index-mpack-1665"></a>
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Pack VLIW instructions.
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<br><dt><code>-mno-pack</code><dd><a name="index-mno_002dpack-1666"></a>
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Do not pack VLIW instructions.
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<br><dt><code>-mno-eflags</code><dd><a name="index-mno_002deflags-1667"></a>
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Do not mark ABI switches in e_flags.
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<br><dt><code>-mcond-move</code><dd><a name="index-mcond_002dmove-1668"></a>
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Enable the use of conditional-move instructions (default).
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mno-cond-move</code><dd><a name="index-mno_002dcond_002dmove-1669"></a>
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Disable the use of conditional-move instructions.
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mscc</code><dd><a name="index-mscc-1670"></a>
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Enable the use of conditional set instructions (default).
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mno-scc</code><dd><a name="index-mno_002dscc-1671"></a>
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Disable the use of conditional set instructions.
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mcond-exec</code><dd><a name="index-mcond_002dexec-1672"></a>
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Enable the use of conditional execution (default).
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mno-cond-exec</code><dd><a name="index-mno_002dcond_002dexec-1673"></a>
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Disable the use of conditional execution.
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mvliw-branch</code><dd><a name="index-mvliw_002dbranch-1674"></a>
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Run a pass to pack branches into VLIW instructions (default).
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mno-vliw-branch</code><dd><a name="index-mno_002dvliw_002dbranch-1675"></a>
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Do not run a pass to pack branches into VLIW instructions.
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mmulti-cond-exec</code><dd><a name="index-mmulti_002dcond_002dexec-1676"></a>
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Enable optimization of <code>&&</code> and <code>||</code> in conditional execution
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(default).
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mno-multi-cond-exec</code><dd><a name="index-mno_002dmulti_002dcond_002dexec-1677"></a>
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Disable optimization of <code>&&</code> and <code>||</code> in conditional execution.
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mnested-cond-exec</code><dd><a name="index-mnested_002dcond_002dexec-1678"></a>
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Enable nested conditional execution optimizations (default).
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-mno-nested-cond-exec</code><dd><a name="index-mno_002dnested_002dcond_002dexec-1679"></a>
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Disable nested conditional execution optimizations.
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<p>This switch is mainly for debugging the compiler and will likely be removed
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in a future version.
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<br><dt><code>-moptimize-membar</code><dd><a name="index-moptimize_002dmembar-1680"></a>
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This switch removes redundant <code>membar</code> instructions from the
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compiler-generated code. It is enabled by default.
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<br><dt><code>-mno-optimize-membar</code><dd><a name="index-mno_002doptimize_002dmembar-1681"></a>
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This switch disables the automatic removal of redundant <code>membar</code>
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instructions from the generated code.
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<br><dt><code>-mtomcat-stats</code><dd><a name="index-mtomcat_002dstats-1682"></a>
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Cause gas to print out tomcat statistics.
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<br><dt><code>-mcpu=</code><var>cpu</var><dd><a name="index-mcpu-1683"></a>
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Select the processor type for which to generate code. Possible values are
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‘<samp><span class="samp">frv</span></samp>’, ‘<samp><span class="samp">fr550</span></samp>’, ‘<samp><span class="samp">tomcat</span></samp>’, ‘<samp><span class="samp">fr500</span></samp>’, ‘<samp><span class="samp">fr450</span></samp>’,
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‘<samp><span class="samp">fr405</span></samp>’, ‘<samp><span class="samp">fr400</span></samp>’, ‘<samp><span class="samp">fr300</span></samp>’ and ‘<samp><span class="samp">simple</span></samp>’.
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</dl>
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</body></html>
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