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| <h4 class="subsection">3.17.5 CRIS Options</h4> |
| |
| <p><a name="index-CRIS-Options-1069"></a> |
| These options are defined specifically for the CRIS ports. |
| |
| <dl> |
| <dt><code>-march=</code><var>architecture-type</var><dt><code>-mcpu=</code><var>architecture-type</var><dd><a name="index-march-1070"></a><a name="index-mcpu-1071"></a>Generate code for the specified architecture. The choices for |
| <var>architecture-type</var> are ‘<samp><span class="samp">v3</span></samp>’, ‘<samp><span class="samp">v8</span></samp>’ and ‘<samp><span class="samp">v10</span></samp>’ for |
| respectively ETRAX <!-- /@w -->4, ETRAX <!-- /@w -->100, and ETRAX <!-- /@w -->100 <!-- /@w -->LX. |
| Default is ‘<samp><span class="samp">v0</span></samp>’ except for cris-axis-linux-gnu, where the default is |
| ‘<samp><span class="samp">v10</span></samp>’. |
| |
| <br><dt><code>-mtune=</code><var>architecture-type</var><dd><a name="index-mtune-1072"></a>Tune to <var>architecture-type</var> everything applicable about the generated |
| code, except for the ABI and the set of available instructions. The |
| choices for <var>architecture-type</var> are the same as for |
| <samp><span class="option">-march=</span><var>architecture-type</var></samp>. |
| |
| <br><dt><code>-mmax-stack-frame=</code><var>n</var><dd><a name="index-mmax_002dstack_002dframe-1073"></a>Warn when the stack frame of a function exceeds <var>n</var> bytes. |
| |
| <br><dt><code>-metrax4</code><dt><code>-metrax100</code><dd><a name="index-metrax4-1074"></a><a name="index-metrax100-1075"></a>The options <samp><span class="option">-metrax4</span></samp> and <samp><span class="option">-metrax100</span></samp> are synonyms for |
| <samp><span class="option">-march=v3</span></samp> and <samp><span class="option">-march=v8</span></samp> respectively. |
| |
| <br><dt><code>-mmul-bug-workaround</code><dt><code>-mno-mul-bug-workaround</code><dd><a name="index-mmul_002dbug_002dworkaround-1076"></a><a name="index-mno_002dmul_002dbug_002dworkaround-1077"></a>Work around a bug in the <code>muls</code> and <code>mulu</code> instructions for CPU |
| models where it applies. This option is active by default. |
| |
| <br><dt><code>-mpdebug</code><dd><a name="index-mpdebug-1078"></a>Enable CRIS-specific verbose debug-related information in the assembly |
| code. This option also has the effect to turn off the ‘<samp><span class="samp">#NO_APP</span></samp>’ |
| formatted-code indicator to the assembler at the beginning of the |
| assembly file. |
| |
| <br><dt><code>-mcc-init</code><dd><a name="index-mcc_002dinit-1079"></a>Do not use condition-code results from previous instruction; always emit |
| compare and test instructions before use of condition codes. |
| |
| <br><dt><code>-mno-side-effects</code><dd><a name="index-mno_002dside_002deffects-1080"></a>Do not emit instructions with side-effects in addressing modes other than |
| post-increment. |
| |
| <br><dt><code>-mstack-align</code><dt><code>-mno-stack-align</code><dt><code>-mdata-align</code><dt><code>-mno-data-align</code><dt><code>-mconst-align</code><dt><code>-mno-const-align</code><dd><a name="index-mstack_002dalign-1081"></a><a name="index-mno_002dstack_002dalign-1082"></a><a name="index-mdata_002dalign-1083"></a><a name="index-mno_002ddata_002dalign-1084"></a><a name="index-mconst_002dalign-1085"></a><a name="index-mno_002dconst_002dalign-1086"></a>These options (no-options) arranges (eliminate arrangements) for the |
| stack-frame, individual data and constants to be aligned for the maximum |
| single data access size for the chosen CPU model. The default is to |
| arrange for 32-bit alignment. ABI details such as structure layout are |
| not affected by these options. |
| |
| <br><dt><code>-m32-bit</code><dt><code>-m16-bit</code><dt><code>-m8-bit</code><dd><a name="index-m32_002dbit-1087"></a><a name="index-m16_002dbit-1088"></a><a name="index-m8_002dbit-1089"></a>Similar to the stack- data- and const-align options above, these options |
| arrange for stack-frame, writable data and constants to all be 32-bit, |
| 16-bit or 8-bit aligned. The default is 32-bit alignment. |
| |
| <br><dt><code>-mno-prologue-epilogue</code><dt><code>-mprologue-epilogue</code><dd><a name="index-mno_002dprologue_002depilogue-1090"></a><a name="index-mprologue_002depilogue-1091"></a>With <samp><span class="option">-mno-prologue-epilogue</span></samp>, the normal function prologue and |
| epilogue that sets up the stack-frame are omitted and no return |
| instructions or return sequences are generated in the code. Use this |
| option only together with visual inspection of the compiled code: no |
| warnings or errors are generated when call-saved registers must be saved, |
| or storage for local variable needs to be allocated. |
| |
| <br><dt><code>-mno-gotplt</code><dt><code>-mgotplt</code><dd><a name="index-mno_002dgotplt-1092"></a><a name="index-mgotplt-1093"></a>With <samp><span class="option">-fpic</span></samp> and <samp><span class="option">-fPIC</span></samp>, don't generate (do generate) |
| instruction sequences that load addresses for functions from the PLT part |
| of the GOT rather than (traditional on other architectures) calls to the |
| PLT. The default is <samp><span class="option">-mgotplt</span></samp>. |
| |
| <br><dt><code>-melf</code><dd><a name="index-melf-1094"></a>Legacy no-op option only recognized with the cris-axis-elf and |
| cris-axis-linux-gnu targets. |
| |
| <br><dt><code>-mlinux</code><dd><a name="index-mlinux-1095"></a>Legacy no-op option only recognized with the cris-axis-linux-gnu target. |
| |
| <br><dt><code>-sim</code><dd><a name="index-sim-1096"></a>This option, recognized for the cris-axis-elf arranges |
| to link with input-output functions from a simulator library. Code, |
| initialized data and zero-initialized data are allocated consecutively. |
| |
| <br><dt><code>-sim2</code><dd><a name="index-sim2-1097"></a>Like <samp><span class="option">-sim</span></samp>, but pass linker options to locate initialized data at |
| 0x40000000 and zero-initialized data at 0x80000000. |
| </dl> |
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