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<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">-if(NOT arch)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">- if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4")<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">- set(arch 32 CACHE STRING "The architecture to build for (32e/32/arm/ppc64). 32e is Intel(R) 64 architecture, 32 is IA-32 architecture")<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">- else()<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">- set(arch 32e CACHE STRING "The architecture to build for (32e/32/arm/ppc64). 32e is Intel(R) 64 architecture, 32 is IA-32 architecture")<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">- endif()<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">+#if(NOT arch)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">+# if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4")<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">+# set(arch 32 CACHE STRING "The architecture to build for (32e/32/arm/ppc64/aarch64). 32e is Intel(R) 64 architecture, 32 is IA-32
architecture")<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">+# else()<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">+# set(arch 32e CACHE STRING "The architecture to build for (32e/32/arm/ppc64/aarch64). 32e is Intel(R) 64 architecture, 32 is IA-32
architecture")<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">+# endif()<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas">+#endif()<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We can get rid of the if(NOT arch) line, this guard is unnecessary.<o:p></o:p></span></a></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">When CMake is first run on a build directory, it creates a CMakeCache.txt file inside the build directory which is the configuration of your build. Any variable
in the CMakeLists.txt file which is set with the CACHE option (along with a type and docstring) is either set from the command line via –DVARIABLE=value or from this default value in the CMakeLists.txt file. The –DVARIABLE=value takes precedence over what
is in the CMakeLists.txt file in the initial CMake run. On subsequent runs of CMake, VARIABLE is set *<b>FROM THE CMakeCache.txt</b>* file. You can change this value in CMakeCache.txt manually or with:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">cmake –DVARIABLE=value ..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In summary, the first run of CMake sets the initial value of arch either with –Darch=value, or by the logic in the CMakeLists.txt file. After that initial
run, it grabs the value of arch from CMakeCache.txt. An example might help illustrate what I’m saying:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[ This assumes you don’t blast away the build directory between cmake runs ]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1) cmake –Darch=arm (Rest of your variables) .. [ This will override what is in CMakeLists.txt and put arm in CMakeCache.txt and set arch to arm for the initial
CMake run)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">…
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">2) cmake –Dsome_other_variable=value .. [ This will use the arch value stored in CMakeCache.txt (currently arm) ]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">…
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">3) cmake –Darch=32e .. [ This will set the value in CMakeCache.txt to 32e and use 32e during this third run of CMake ]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">…
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">4) vi CMakeCache.txt (edit arch to be ppc64)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">5) make (This call to GNU Make will recall cmake but use value of arch in CMakeCache.txt which is ppc64)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-- Johnny<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> openmp-dev-bounces@cs.uiuc.edu [mailto:openmp-dev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>Cownie, James H<br>
<b>Sent:</b> Monday, October 27, 2014 7:01 AM<br>
<b>To:</b> C Bergström; openmp-dev@dcs-maillist2.engr.illinois.edu<br>
<b>Subject:</b> Re: [Openmp-dev] AArch64 support<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Lucida Console";color:#1F497D">+if("${arch}" STREQUAL "32e" OR "${arch}" STREQUAL "32" OR "${arch}" STREQUAL "arm" OR "${arch}" STREQUAL "aarch64")<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Lucida Console";color:#1F497D"> set(FEATURE_FLAGS "${FEATURE_FLAGS} -D KMP_USE_ADAPTIVE_LOCKS=1")<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Lucida Console";color:#1F497D"> set(FEATURE_FLAGS "${FEATURE_FLAGS} -D KMP_DEBUG_ADAPTIVE_LOCKS=0")<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Lucida Console";color:#1F497D">endif()<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Do you really want the adaptive locks for arm and aarch64?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Since they use the Intel specific transactional synchronization extensions (TSX) it seems unlikely to me.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Otherwise LGTM (though I have no testing environment for it).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">-- Jim<br>
<br>
James Cownie <<a href="mailto:james.h.cownie@intel.com">james.h.cownie@intel.com</a>><br>
SSG/DPD/TCAR (Technical Computing, Analyzers and Runtimes)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Tel: +44 117 9071438</span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:openmp-dev-bounces@cs.uiuc.edu">openmp-dev-bounces@cs.uiuc.edu</a> [<a href="mailto:openmp-dev-bounces@cs.uiuc.edu">mailto:openmp-dev-bounces@cs.uiuc.edu</a>]
<b>On Behalf Of </b>C Bergström<br>
<b>Sent:</b> Sunday, October 26, 2014 7:05 PM<br>
<b>To:</b> <a href="mailto:openmp-dev@dcs-maillist2.engr.illinois.edu">openmp-dev@dcs-maillist2.engr.illinois.edu</a><br>
<b>Subject:</b> Re: [Openmp-dev] AArch64 support<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-GB">On Sun, Oct 26, 2014 at 8:34 PM, C Bergström <<a href="mailto:cbergstrom@pathscale.com" target="_blank">cbergstrom@pathscale.com</a>> wrote:<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-GB">Hi<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-GB">Does anyone have a patch for AArch64 support? Either experimental, complete or notes/suggestions.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-GB">So here's a 1st draft for review - I don't expect it to be clean on the 1st pass, but getting some review would be really appreciated.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-GB">btw - Is anyone testing this on ARM or PPC64 regularly?<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
</div>
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<p class="MsoNormal"><span lang="EN-GB">Thanks<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
</div>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
</div>
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