Hello!
When gromacs-5.1 is configured for double precision, I get the following
compilation error when building the internal tests (make check):
[...]
[ 94%] Building CXX object
src/gromacs/simd/tests/CMakeFiles/simd-test.dir/simd_integer.cpp.o
cd /builddir/build/BUILD/gromacs-5.1/openmpi_d/src/gromacs/simd/tests &&
/usr/bin/c++ -DGMX_DOUBLE -DGTEST_USE_OWN_TR1_TUPLE=1 -DHAVE_CONFIG_H
-DTEST_DATA_PATH=\"src/gromacs/simd/tests\"
-DTEST_TEMP_PATH=\"/builddir/build/BUILD/gromacs-5.1/openmpi_d/src/gromacs/simd/tests/Testing/Temporary\"
-mvsx -std=c++0x -O2 -g -pipe -Wall -Werror=format-security -Wp
,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong
--param=ssp-buffer-size=4 -grecord-gcc-switches
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -Wundef -Wextra
-Wno-missing-field-initializers -Wpointer-arith -Wall -Wno-unused-function
-funroll-all-loops -fexcess-precision=fast -Wno-array-bounds -isystem
/builddir/build/BUILD/gromacs-5.1/src/external/gmock-1.7.0/gtest/include
-isystem /builddir/build/BUILD/gromacs-5.1/src/external/gmock-1.7.0/include
-I/builddir/build/BUILD/gromacs-5.1/openmpi_d/src/external/tng_io/include
-I/builddir/build/BUILD/gromacs-5.1/src/external/tng_io/include
-I/builddir/build/BUILD/gromacs-5.1/openmpi_d/src
-I/builddir/build/BUILD/gromacs-5.1/src/external/thread_mpi/include
-I/builddir/build/BUILD/gromacs-5.1/src -I/usr/include/openmpi-ppc64
-Wno-unused-variable -o CMakeFiles/simd-test.dir/simd_integer.cpp.o -c
/builddir/build/BUILD/gromacs-5.1/src/gromacs/simd/tests/simd_integer.cpp
In file included from
/builddir/build/BUILD/gromacs-5.1/src/gromacs/simd/simd.h:138:0,
from
/builddir/build/BUILD/gromacs-5.1/src/gromacs/simd/tests/simd_integer.cpp:37:
/builddir/build/BUILD/gromacs-5.1/src/gromacs/simd/impl_ibm_vsx/impl_ibm_vsx.h:
In member function 'virtual void
gmx::test::{anonymous}::SimdIntegerTest_gmxSimdCvtI2R_Test::TestBody()':
/builddir/build/BUILD/gromacs-5.1/src/gromacs/simd/impl_ibm_vsx/impl_ibm_vsx.h:452:80:
error: 'asm' operand has impossible constraints
__asm__ ("xvcvsxwdp %0,%1" : "=ww" (x) : "ww" ((__vector signed int)
(ix)));
^
/builddir/build/BUILD/gromacs-5.1/src/gromacs/simd/impl_ibm_vsx/impl_ibm_vsx.h:452:80:
error: 'asm' operand has impossible constraints
__asm__ ("xvcvsxwdp %0,%1" : "=ww" (x) : "ww" ((__vector signed int)
(ix)));
^
src/gromacs/simd/tests/CMakeFiles/simd-test.dir/build.make:209: recipe for
target 'src/gromacs/simd/tests/CMakeFiles/simd-test.dir/simd_integer.cpp.o'
failed
make[3]: ***
[src/gromacs/simd/tests/CMakeFiles/simd-test.dir/simd_integer.cpp.o] Error 1
[...]
This happens on:
$ cat /proc/cpuinfo
processor : 0
cpu : POWER8E (raw), altivec supported
clock : 3425.000000MHz
revision : 2.1 (pvr 004b 0201)
processor : 1
cpu : POWER8E (raw), altivec supported
clock : 3425.000000MHz
revision : 2.1 (pvr 004b 0201)
timebase : 512000000
platform : pSeries
model : IBM pSeries (emulated by qemu)
machine : CHRP IBM pSeries (emulated by qemu)
in Fedora rawhide (F24) chroot while building the gromacs package
(http://pkgs.fedoraproject.org/cgit/gromacs.git) under mock.
You have to remove the %ifnarch ppc64 ppc64le part in %install section
to reproduce.
More details here: http://redmine.gromacs.org/issues/1808
AltiVec assembly is far beyond my skill, so I'd appreciate it if someone
could help figure it out.
Regards,
Dominik
--
Fedora http://fedoraproject.org/wiki/User:Rathann
RPMFusion http://rpmfusion.org
"Faith manages."
-- Delenn to Lennier in Babylon 5:"Confessions and Lamentations"
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