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| <h4 class="subsection">3.17.11 FRV Options</h4> |
| |
| <p><a name="index-FRV-Options-1214"></a> |
| <dl> |
| <dt><code>-mgpr-32</code><dd><a name="index-mgpr_002d32-1215"></a> |
| Only use the first 32 general purpose registers. |
| |
| <br><dt><code>-mgpr-64</code><dd><a name="index-mgpr_002d64-1216"></a> |
| Use all 64 general purpose registers. |
| |
| <br><dt><code>-mfpr-32</code><dd><a name="index-mfpr_002d32-1217"></a> |
| Use only the first 32 floating point registers. |
| |
| <br><dt><code>-mfpr-64</code><dd><a name="index-mfpr_002d64-1218"></a> |
| Use all 64 floating point registers |
| |
| <br><dt><code>-mhard-float</code><dd><a name="index-mhard_002dfloat-1219"></a> |
| Use hardware instructions for floating point operations. |
| |
| <br><dt><code>-msoft-float</code><dd><a name="index-msoft_002dfloat-1220"></a> |
| Use library routines for floating point operations. |
| |
| <br><dt><code>-malloc-cc</code><dd><a name="index-malloc_002dcc-1221"></a> |
| Dynamically allocate condition code registers. |
| |
| <br><dt><code>-mfixed-cc</code><dd><a name="index-mfixed_002dcc-1222"></a> |
| Do not try to dynamically allocate condition code registers, only |
| use <code>icc0</code> and <code>fcc0</code>. |
| |
| <br><dt><code>-mdword</code><dd><a name="index-mdword-1223"></a> |
| Change ABI to use double word insns. |
| |
| <br><dt><code>-mno-dword</code><dd><a name="index-mno_002ddword-1224"></a> |
| Do not use double word instructions. |
| |
| <br><dt><code>-mdouble</code><dd><a name="index-mdouble-1225"></a> |
| Use floating point double instructions. |
| |
| <br><dt><code>-mno-double</code><dd><a name="index-mno_002ddouble-1226"></a> |
| Do not use floating point double instructions. |
| |
| <br><dt><code>-mmedia</code><dd><a name="index-mmedia-1227"></a> |
| Use media instructions. |
| |
| <br><dt><code>-mno-media</code><dd><a name="index-mno_002dmedia-1228"></a> |
| Do not use media instructions. |
| |
| <br><dt><code>-mmuladd</code><dd><a name="index-mmuladd-1229"></a> |
| Use multiply and add/subtract instructions. |
| |
| <br><dt><code>-mno-muladd</code><dd><a name="index-mno_002dmuladd-1230"></a> |
| Do not use multiply and add/subtract instructions. |
| |
| <br><dt><code>-mfdpic</code><dd><a name="index-mfdpic-1231"></a> |
| Select the FDPIC ABI, that uses function descriptors to represent |
| pointers to functions. Without any PIC/PIE-related options, it |
| 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 |
| assumes GOT entries and small data are within a 12-bit range from the |
| GOT base address; with <samp><span class="option">-fPIC</span></samp> or <samp><span class="option">-fPIE</span></samp>, GOT offsets |
| are computed with 32 bits. |
| With a ‘<samp><span class="samp">bfin-elf</span></samp>’ target, this option implies <samp><span class="option">-msim</span></samp>. |
| |
| <br><dt><code>-minline-plt</code><dd><a name="index-minline_002dplt-1232"></a> |
| Enable inlining of PLT entries in function calls to functions that are |
| not known to bind locally. It has no effect without <samp><span class="option">-mfdpic</span></samp>. |
| It's enabled by default if optimizing for speed and compiling for |
| shared libraries (i.e., <samp><span class="option">-fPIC</span></samp> or <samp><span class="option">-fpic</span></samp>), or when an |
| optimization option such as <samp><span class="option">-O3</span></samp> or above is present in the |
| command line. |
| |
| <br><dt><code>-mTLS</code><dd><a name="index-mTLS-1233"></a> |
| Assume a large TLS segment when generating thread-local code. |
| |
| <br><dt><code>-mtls</code><dd><a name="index-mtls-1234"></a> |
| Do not assume a large TLS segment when generating thread-local code. |
| |
| <br><dt><code>-mgprel-ro</code><dd><a name="index-mgprel_002dro-1235"></a> |
| Enable the use of <code>GPREL</code> relocations in the FDPIC ABI for data |
| that is known to be in read-only sections. It's enabled by default, |
| except for <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fpie</span></samp>: even though it may help |
| make the global offset table smaller, it trades 1 instruction for 4. |
| With <samp><span class="option">-fPIC</span></samp> or <samp><span class="option">-fPIE</span></samp>, it trades 3 instructions for 4, |
| one of which may be shared by multiple symbols, and it avoids the need |
| for a GOT entry for the referenced symbol, so it's more likely to be a |
| win. If it is not, <samp><span class="option">-mno-gprel-ro</span></samp> can be used to disable it. |
| |
| <br><dt><code>-multilib-library-pic</code><dd><a name="index-multilib_002dlibrary_002dpic-1236"></a> |
| Link with the (library, not FD) pic libraries. It's implied by |
| <samp><span class="option">-mlibrary-pic</span></samp>, as well as by <samp><span class="option">-fPIC</span></samp> and |
| <samp><span class="option">-fpic</span></samp> without <samp><span class="option">-mfdpic</span></samp>. You should never have to use |
| it explicitly. |
| |
| <br><dt><code>-mlinked-fp</code><dd><a name="index-mlinked_002dfp-1237"></a> |
| Follow the EABI requirement of always creating a frame pointer whenever |
| a stack frame is allocated. This option is enabled by default and can |
| be disabled with <samp><span class="option">-mno-linked-fp</span></samp>. |
| |
| <br><dt><code>-mlong-calls</code><dd><a name="index-mlong_002dcalls-1238"></a> |
| Use indirect addressing to call functions outside the current |
| compilation unit. This allows the functions to be placed anywhere |
| within the 32-bit address space. |
| |
| <br><dt><code>-malign-labels</code><dd><a name="index-malign_002dlabels-1239"></a> |
| Try to align labels to an 8-byte boundary by inserting nops into the |
| previous packet. This option only has an effect when VLIW packing |
| is enabled. It doesn't create new packets; it merely adds nops to |
| existing ones. |
| |
| <br><dt><code>-mlibrary-pic</code><dd><a name="index-mlibrary_002dpic-1240"></a> |
| Generate position-independent EABI code. |
| |
| <br><dt><code>-macc-4</code><dd><a name="index-macc_002d4-1241"></a> |
| Use only the first four media accumulator registers. |
| |
| <br><dt><code>-macc-8</code><dd><a name="index-macc_002d8-1242"></a> |
| Use all eight media accumulator registers. |
| |
| <br><dt><code>-mpack</code><dd><a name="index-mpack-1243"></a> |
| Pack VLIW instructions. |
| |
| <br><dt><code>-mno-pack</code><dd><a name="index-mno_002dpack-1244"></a> |
| Do not pack VLIW instructions. |
| |
| <br><dt><code>-mno-eflags</code><dd><a name="index-mno_002deflags-1245"></a> |
| Do not mark ABI switches in e_flags. |
| |
| <br><dt><code>-mcond-move</code><dd><a name="index-mcond_002dmove-1246"></a> |
| Enable the use of conditional-move instructions (default). |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mno-cond-move</code><dd><a name="index-mno_002dcond_002dmove-1247"></a> |
| Disable the use of conditional-move instructions. |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mscc</code><dd><a name="index-mscc-1248"></a> |
| Enable the use of conditional set instructions (default). |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mno-scc</code><dd><a name="index-mno_002dscc-1249"></a> |
| Disable the use of conditional set instructions. |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mcond-exec</code><dd><a name="index-mcond_002dexec-1250"></a> |
| Enable the use of conditional execution (default). |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mno-cond-exec</code><dd><a name="index-mno_002dcond_002dexec-1251"></a> |
| Disable the use of conditional execution. |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mvliw-branch</code><dd><a name="index-mvliw_002dbranch-1252"></a> |
| Run a pass to pack branches into VLIW instructions (default). |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mno-vliw-branch</code><dd><a name="index-mno_002dvliw_002dbranch-1253"></a> |
| Do not run a pass to pack branches into VLIW instructions. |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mmulti-cond-exec</code><dd><a name="index-mmulti_002dcond_002dexec-1254"></a> |
| Enable optimization of <code>&&</code> and <code>||</code> in conditional execution |
| (default). |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mno-multi-cond-exec</code><dd><a name="index-mno_002dmulti_002dcond_002dexec-1255"></a> |
| Disable optimization of <code>&&</code> and <code>||</code> in conditional execution. |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mnested-cond-exec</code><dd><a name="index-mnested_002dcond_002dexec-1256"></a> |
| Enable nested conditional execution optimizations (default). |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-mno-nested-cond-exec</code><dd><a name="index-mno_002dnested_002dcond_002dexec-1257"></a> |
| Disable nested conditional execution optimizations. |
| |
| <p>This switch is mainly for debugging the compiler and will likely be removed |
| in a future version. |
| |
| <br><dt><code>-moptimize-membar</code><dd><a name="index-moptimize_002dmembar-1258"></a> |
| This switch removes redundant <code>membar</code> instructions from the |
| compiler generated code. It is enabled by default. |
| |
| <br><dt><code>-mno-optimize-membar</code><dd><a name="index-mno_002doptimize_002dmembar-1259"></a> |
| This switch disables the automatic removal of redundant <code>membar</code> |
| instructions from the generated code. |
| |
| <br><dt><code>-mtomcat-stats</code><dd><a name="index-mtomcat_002dstats-1260"></a> |
| Cause gas to print out tomcat statistics. |
| |
| <br><dt><code>-mcpu=</code><var>cpu</var><dd><a name="index-mcpu-1261"></a> |
| Select the processor type for which to generate code. Possible values are |
| ‘<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>’, |
| ‘<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>’. |
| |
| </dl> |
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