search for: libmvec

...e: > On Tue, Sep 1, 2020 at 9:07 AM Venkataramanan Kumar > <venkataramanan.kumar.llvm at gmail.com <mailto:venkataramanan.kumar.llvm at gmail.com>> wrote: > > Hi Alexandre, > > Hi Venkataramanan, > > > I am not sure if we can generate vector calls to GlibC libmvec. > Is the support for libmvec on the roadmap? If not how to add it? > > I also wanted to check with others here, if we can add support for vector routines in Glibc libmvec. > > Libmvec may not be available in machines which uses lower versions of glibc. We may have to take care o...

On Tue, Sep 1, 2020 at 9:07 AM Venkataramanan Kumar <venkataramanan.kumar.llvm at gmail.com> wrote: > Hi Alexandre, Hi Venkataramanan, > I am not sure if we can generate vector calls to GlibC libmvec. Is the support for libmvec on the roadmap? If not how to add it? > ./clang --autocomplete=-fveclib= This is amazing, thank you! I think it should be documented in clang auto vectorization documentation. Thank you very much, -- Alexandre BIQUE

Hi Venkat., Did you make progress with libmvec? Is there a chance that it lands into clang 11? Regards, Alexandre Bique On Tue, Sep 1, 2020 at 11:50 AM Venkataramanan Kumar <venkataramanan.kumar.llvm at gmail.com> wrote: > > Hi Florian, > > On Tue, 1 Sep, 2020, 3:11 pm Florian Hahn, <florian_hahn at apple.com> wrote: &...

No. A shared object is needed if it is linked in (1)--no-as-needed mode or (2) after --gc-sections, a symbol referenced by a live input section is defined by the shared object. You'll need to check whether a symbol is defined by libmvec.so.1 On Mon, Nov 9, 2020 at 9:57 AM Alexandre Bique <bique.alexandre at gmail.com> wrote: > > On Mon, Nov 9, 2020 at 6:52 PM Fāng-ruì Sòng <maskray at google.com> wrote: > > Recent libm.a and libm.so are actually linker scripts > > > > % cat /usr/lib/x86_64-linu...

...ojects/Podolski/CMakeFiles/Podolski.dir/__/__/AudioModulesFrame/AM_PitchTrack.cpp.o: > reference to exp > /usr/lib/libm.so.6: shared definition of exp at GLIBC_2.2.5 > /usr/lib/libm.so.6: shared definition of exp > /usr/lib/libm.so.6: shared definition of exp at GLIBC_2.29 > /usr/lib/libmvec.so.1: reference to exp at GLIBC_2.29 > > So the dependency is being pulled by libmvec. > > Which is strange because the target is not using libmvec: > > [jenkins at archear build-clang.64]$ ldd VstPlugins/libPodolski.so > linux-vdso.so.1 (0x00007ffccff47000) > libexpat.so.1...

Thank you very much for your help Fāng-ruì Sòng. I've tried various things like linking directly to libm-2.32 but it didn't work, it seems that libm-2.32 still pulls libmvec. I have the following linker flags: CLANG_LDFLAGS="-fuse-ld=lld -static-libstdc++ -static-libgcc -fvisibility=hidden -fdata-sections -ffunction-sections" CLANG_LDFLAGS="$CLANG_LDFLAGS -Wl,--gc-sections -Wl,-O1 -Wl,--as-needed -Wl,--strip-all" CLANG_LDFLAGS="$CLANG_LDFLAGS...

On Tue, Nov 10, 2020 at 12:27 AM Alexandre Bique <bique.alexandre at gmail.com> wrote: > > Thank you very much for your help Fāng-ruì Sòng. > > I've tried various things like linking directly to libm-2.32 but it > didn't work, it seems that libm-2.32 still pulls libmvec. > > I have the following linker flags: > > CLANG_LDFLAGS="-fuse-ld=lld -static-libstdc++ -static-libgcc > -fvisibility=hidden -fdata-sections -ffunction-sections" > CLANG_LDFLAGS="$CLANG_LDFLAGS -Wl,--gc-sections -Wl,-O1 > -Wl,--as-needed -Wl,--strip-all" &...

On Wed, Oct 28, 2020 at 6:07 PM Fangrui Song <maskray at google.com> wrote: > > On 2020-10-28, Alexandre Bique via llvm-dev wrote: > >Hi, > > > >I wonder what is the right way to target an old glibc? > > > >I have a machine which is up to date (glibc 2.32 and clang+lld 10.0.1). > > > >So far I've been able to target older glibc by having a

...gt; section is defined by the shared object. A shared object is needed if it is linked in (1) --no-as-needed mode or (2) after --gc-sections, a symbol referenced by a live input section is defined by the shared object as non-STB_WEAK. > You'll need to check whether a symbol is defined by libmvec.so.1 > > On Mon, Nov 9, 2020 at 9:57 AM Alexandre Bique > <bique.alexandre at gmail.com> wrote: > > > > On Mon, Nov 9, 2020 at 6:52 PM Fāng-ruì Sòng <maskray at google.com> wrote: > > > Recent libm.a and libm.so are actually linker scripts > > > &g...

....c.o: reference to exp Projects/Podolski/CMakeFiles/Podolski.dir/__/__/AudioModulesFrame/AM_PitchTrack.cpp.o: reference to exp /usr/lib/libm.so.6: shared definition of exp at GLIBC_2.2.5 /usr/lib/libm.so.6: shared definition of exp /usr/lib/libm.so.6: shared definition of exp at GLIBC_2.29 /usr/lib/libmvec.so.1: reference to exp at GLIBC_2.29 So the dependency is being pulled by libmvec. Which is strange because the target is not using libmvec: [jenkins at archear build-clang.64]$ ldd VstPlugins/libPodolski.so linux-vdso.so.1 (0x00007ffccff47000) libexpat.so.1 => /usr/lib/libexpat.so.1 (0x00007...

On Tue, Nov 10, 2020 at 7:01 PM Fāng-ruì Sòng <maskray at google.com> wrote: > > How to find what is pulling libmvec? > > If you build a -DCMAKE_BUILD_TYPE=Debug lld, you can set a breakpoint > on lld/ELF/MarkLive.cpp:114 (ss->getFile().isNeeded) and check which > symbol makes > libmvec.so needed. I'm afraid this is going to far for me :) > > On the other hand, I don't understand...

I've tried to do: clang++ -O3 -march=native -mtune=native \ -Rpass=loop-vectorize,slp-vectorize -Rpass-missed=loop-vectorize,slp-vectorize -Rpass-analysis=loop-vectorize,slp-vectorize \ -ffast-math -ffp-model=fast -ffp-exception-behavior=ignore -ffp-contract=fast \ -c -o vec.o vec.cc But I've got no feedback. -- Alexandre Bique

...-ruì Sòng <maskray at google.com> wrote: > Recent libm.a and libm.so are actually linker scripts > > % cat /usr/lib/x86_64-linux-gnu/libm.a > /* GNU ld script > */ > OUTPUT_FORMAT(elf64-x86-64) > GROUP ( /usr/lib/x86_64-linux-gnu/libm-2.31.a > /usr/lib/x86_64-linux-gnu/libmvec.a ) > % cat /usr/lib/x86_64-linux-gnu/libm.so > /* GNU ld script > */ > OUTPUT_FORMAT(elf64-x86-64) > GROUP ( /lib/x86_64-linux-gnu/libm.so.6 AS_NEEDED ( > /lib/x86_64-linux-gnu/libmvec.so.1 ) ) In this script the libmvec is mentioned as "AS_NEEDED", and it is not need...

...Podolski.64.so > > Alexandre Bique > > On Wed, Nov 11, 2020 at 2:19 PM Alexandre Bique > <bique.alexandre at gmail.com> wrote: > > > > On Tue, Nov 10, 2020 at 7:01 PM Fāng-ruì Sòng <maskray at google.com> wrote: > > > > How to find what is pulling libmvec? > > > > > > If you build a -DCMAKE_BUILD_TYPE=Debug lld, you can set a breakpoint > > > on lld/ELF/MarkLive.cpp:114 (ss->getFile().isNeeded) and check which > > > symbol makes > > > libmvec.so needed. > > > > I'm afraid this is going...

...: patchelf --clear-symbol-version log Podolski.64.so Alexandre Bique On Wed, Nov 11, 2020 at 2:19 PM Alexandre Bique <bique.alexandre at gmail.com> wrote: > > On Tue, Nov 10, 2020 at 7:01 PM Fāng-ruì Sòng <maskray at google.com> wrote: > > > How to find what is pulling libmvec? > > > > If you build a -DCMAKE_BUILD_TYPE=Debug lld, you can set a breakpoint > > on lld/ELF/MarkLive.cpp:114 (ss->getFile().isNeeded) and check which > > symbol makes > > libmvec.so needed. > > I'm afraid this is going to far for me :) > > > &gt...

...; Alexandre Bique >> >> On Wed, Nov 11, 2020 at 2:19 PM Alexandre Bique >> <bique.alexandre at gmail.com> wrote: >> > >> > On Tue, Nov 10, 2020 at 7:01 PM Fāng-ruì Sòng <maskray at google.com> wrote: >> > > > How to find what is pulling libmvec? >> > > >> > > If you build a -DCMAKE_BUILD_TYPE=Debug lld, you can set a breakpoint >> > > on lld/ELF/MarkLive.cpp:114 (ss->getFile().isNeeded) and check which >> > > symbol makes >> > > libmvec.so needed. >> > >> > I...

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...om: (NULL) (136.159.169.6) > > > When compiling R 2.6.1 (alpha 2007-09-13), grDevices.so fails to link > properly because of a missing symbol __vlog_. That is not what the error message reproduced below says, which comes from the runtime loader. > This symbol is defined in > libmvec.so, but no -lmvec is add by the configure script. Manually > adding -lmvec to the linking command allows grDevices to compile. The > error output of the make command (for a 64-bit version of R) is given > below: > > cc -G -m64 -L/lib/64 -L/usr/lib/64 -L/usr/local/lib/64 -L/usr/u...

...1 43 3c vmovss %xmm0,0x3c(%rbx) 1e2: 48 83 c4 10 add $0x10,%rsp 1e6: 5b pop %rbx 1e7: c3 retq As you can see there is no call to a vectorized version of sin. Did I do something wrong? By the way I am on Linux with glibc 2.32 which has libmvec. Regards, -- Alexandre Bique

...g references [2]. References ========== 1. OpenMP SIMD language extensions: http://www.openmp.org/mp-documents/openmp-4. 5.pdf 2. VectorABI Documentation: https://www.cilkplus.org/sites/default/files/open_specifications/Intel-ABI-Vecto r-Function-2012-v0.9.5.pdf https://sourceware.org/glibc/wiki/libmvec?action=AttachFile&do=view&target=Vecto rABI.txt [[Note: VectorABI was reviewed at X86-64 System V Application Binary Interface mailing list. The discussion was recorded at https://groups.google.com/forum/#!topic/x86-64-abi/LmppCfN1rZ4 ]] 3. The first paper on SIMD extensio...