From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: test results from latest git
Date: Mon, 15 Feb 2016 22:04:52 +0100 [thread overview]
Message-ID: <20160215210452.GS9915@port70.net> (raw)
In-Reply-To: <20160215201122.GU9349@brightrain.aerifal.cx>
* Rich Felker <dalias@libc.org> [2016-02-15 15:11:22 -0500]:
> On Mon, Feb 15, 2016 at 09:05:40PM +0100, Waldemar Brodkorb wrote:
> > Hi,
> > Szabolcs Nagy wrote,
> >
> > > * Waldemar Brodkorb <wbx@openadk.org> [2016-02-15 17:45:11 +0100]:
> > > >
> > > > I uploaded latest test results from embedded-test here:
> > > > http://tests.embedded-test.org/musl/git-14022016/
> > > >
> > >
> > > hm, almost all armv7 float/math tests failed
> > >
> > > can you give some info about the toolchain? (gcc -v)
> > > and the armv6 one for comparision? (which seems to work)
> >
> > ARMv6:
> > usr/bin/arm-openadk-linux-musleabihf-gcc -v
> > Using built-in specs.
> > COLLECT_GCC=./openadk/toolchain_qemu-arm-realview-eb-mpcore_musl_arm_hard_eabihf/usr/bin/arm-openadk-linux-musleabihf-gcc
> > COLLECT_LTO_WRAPPER=/home/wbx/embedded-test/openadk/toolchain_qemu-arm-realview-eb-mpcore_musl_arm_hard_eabihf/usr/libexec/gcc/arm-openadk-linux-musleabihf/5.3.0/lto-wrapper
> > Target: arm-openadk-linux-musleabihf
> > Configured with:
> > /home/wbx/embedded-test/openadk/toolchain_build_qemu-arm-realview-eb-mpcore_musl_arm_hard_eabihf/w-gcc-5.3.0-1/gcc-5.3.0/configure
> > --prefix=/home/wbx/embedded-test/openadk/toolchain_qemu-arm-realview-eb-mpcore_musl_arm_hard_eabihf/usr
> > --with-bugurl=http://www.openadk.org/ --build=x86_64-linux-gnu
> > --host=x86_64-linux-gnu --target=arm-openadk-linux-musleabihf
> > --with-gmp=/home/wbx/embedded-test/openadk/host_x86_64-linux-gnu/usr
> > --with-mpfr=/home/wbx/embedded-test/openadk/host_x86_64-linux-gnu/usr
> > --with-libelf=/home/wbx/embedded-test/openadk/host_x86_64-linux-gnu/usr
> > --disable-__cxa_atexit --with-system-zlib --with-gnu-ld
> > --with-gnu-as --disable-libsanitizer --disable-install-libiberty
> > --disable-libitm --disable-libmudflap --disable-libgomp
> > --disable-libcilkrts --disable-libquadmath
> > --disable-libquadmath-support --disable-decimal-float
> > --disable-libstdcxx-pch --disable-ppl-version-check
> > --disable-cloog-version-check --without-ppl --without-cloog
> > --without-isl --disable-nls --disable-lto --with-cpu=mpcore
> > --with-float=hard --enable-tls --enable-threads --enable-libatomic
> > --enable-shared=libstdc++,libgcc --disable-libssp --disable-biarch
> > --disable-multilib --enable-cxx-flags=-fPIC --enable-languages=c,c++
> > --with-build-sysroot='/../../target_qemu-arm-realview-eb-mpcore_musl_arm_hard_eabihf'
> > --with-sysroot='/../../target_qemu-arm-realview-eb-mpcore_musl_arm_hard_eabihf'
> > Thread model: posix
> > gcc version 5.3.0 (GCC)
> >
> > ARMv7:
> > usr/bin/arm-openadk-linux-musleabihf-gcc -v
> > Using built-in specs.
> > COLLECT_GCC=./openadk/toolchain_qemu-arm-vexpress-a9_musl_arm_hard_eabihf/usr/bin/arm-openadk-linux-musleabihf-gcc
> > COLLECT_LTO_WRAPPER=/home/wbx/embedded-test/openadk/toolchain_qemu-arm-vexpress-a9_musl_arm_hard_eabihf/usr/libexec/gcc/arm-openadk-linux-musleabihf/5.3.0/lto-wrapper
> > Target: arm-openadk-linux-musleabihf
> > Configured with:
> > /home/wbx/embedded-test/openadk/toolchain_build_qemu-arm-vexpress-a9_musl_arm_hard_eabihf/w-gcc-5.3.0-1/gcc-5.3.0/configure
> > --prefix=/home/wbx/embedded-test/openadk/toolchain_qemu-arm-vexpress-a9_musl_arm_hard_eabihf/usr
> > --with-bugurl=http://www.openadk.org/ --build=x86_64-linux-gnu
> > --host=x86_64-linux-gnu --target=arm-openadk-linux-musleabihf
> > --with-gmp=/home/wbx/embedded-test/openadk/host_x86_64-linux-gnu/usr
> > --with-mpfr=/home/wbx/embedded-test/openadk/host_x86_64-linux-gnu/usr
> > --with-libelf=/home/wbx/embedded-test/openadk/host_x86_64-linux-gnu/usr
> > --disable-__cxa_atexit --with-system-zlib --with-gnu-ld
> > --with-gnu-as --disable-libsanitizer --disable-install-libiberty
> > --disable-libitm --disable-libmudflap --disable-libgomp
> > --disable-libcilkrts --disable-libquadmath
> > --disable-libquadmath-support --disable-decimal-float
> > --disable-libstdcxx-pch --disable-ppl-version-check
> > --disable-cloog-version-check --without-ppl --without-cloog
> > --without-isl --disable-nls --disable-lto --with-cpu=cortex-a9
> > --with-float=hard --with-fpu=neon-fp16 --enable-tls --enable-threads
> > --enable-libatomic --enable-shared=libstdc++,libgcc --disable-libssp
> > --disable-biarch --disable-multilib --enable-cxx-flags=-fPIC
> > --enable-languages=c,c++
> > --with-build-sysroot='/../../target_qemu-arm-vexpress-a9_musl_arm_hard_eabihf'
> > --with-sysroot='/../../target_qemu-arm-vexpress-a9_musl_arm_hard_eabihf'
> > Thread model: posix
> > gcc version 5.3.0 (GCC)
> >
> > I do not configure any --with-fpu for ARMv6. Are NEON intrinsics the
> > problem?
>
> OK, Neon is almost certainly your problem. It should never be used as
--with-fpu=neon-fp16 should just mean that neon and 16bit fp are
available (as extensions to vfp), it does not mean neon arithmetics
is used by default (and even if it were the failures are not explained)
there is some fundamental problem with the toolchain/qemu/..
and i dont yet see what.. e.g. wrong float.h was used or
similarly bad thing.
> the default for a toolchain because it produces non-IEEE-conforming
> results. You can enable Neon for individual applications where you
> don't care (just like -ffast-math) but using it to build libc will
> result in a broken libc, and using it by default could break other
> apps too. Perhaps we should add something to musl's configure to
> detect this misconfiguration and error out or disable Neon?
>
> Rich
next prev parent reply other threads:[~2016-02-15 21:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-15 16:45 Waldemar Brodkorb
2016-02-15 19:25 ` Szabolcs Nagy
2016-02-15 20:05 ` Waldemar Brodkorb
2016-02-15 20:11 ` Rich Felker
2016-02-15 21:04 ` Szabolcs Nagy [this message]
2016-02-15 21:32 ` Szabolcs Nagy
2016-02-16 18:07 ` Waldemar Brodkorb
2016-02-16 20:00 ` Szabolcs Nagy
2016-02-16 20:13 ` Rich Felker
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