IBM Power8 dt_arith error

Hdf-forum archives
1

Hi All,

I'm compiling HDF5.1.8.17 on an IBM power8 machine. The configure command is:
'CC="mpicc" CXX="mpiCC" FC="mpifort" F90="mpif90" F77="mpif77" CFLAGS="-O0" CXXFLAGS=" -DMPICH_IGNORE_CXX_SEEK" F90FLAGS=" " FFLAGS=" " ./configure --prefix=/prod/acs/prod/IRIS/POWER8/xl-13.1.3/serial/external/hdf5/1.8.17 --with-zlib --disable-shared --enable-fortran --enable-parallel --enable-linux-lfs --enable-production --enable-static'

Summary from the configure output:
SUMMARY OF THE HDF5 CONFIGURATION

···

=================================

General Information:
-------------------
              HDF5 Version: 1.8.17
             Configured on: Thu Aug 4 09:18:16 BST 2016
             Configured by: usid@machine.awe.co.uk
          Configure mode: production
               Host system: powerpc64le-unknown-linux-gnu
           Uname information: Linux machine.awe.co.uk 3.10.0-327.el7.ppc64le #1 SMP Thu Oct 29 17:31:13 EDT 2015 ppc64le ppc64le ppc64le GNU/Linux
                  Byte sex: little-endian
                 Libraries: static
          Installation point: /prod/acs/prod/IRIS/POWER8/xl-13.1.3/serial/external/hdf5/1.8.17

Compiling Options:
------------------
               Compilation Mode: production
                     C Compiler: /prod/acs/openmpi/xl/1.10.2/bin/mpicc ( IBM XL C/C++ 13.01.0003.0000)
                         CFLAGS: -O0
                      H5_CFLAGS: -qlanglvl=stdc99 -qflag=w:w
                      AM_CFLAGS:
                       CPPFLAGS:
                    H5_CPPFLAGS: -D_GNU_SOURCE -D_POSIX_C_SOURCE=200112L -DNDEBUG -UH5_DEBUG_API
                    AM_CPPFLAGS:
               Shared C Library: no
               Static C Library: yes
  Statically Linked Executables: no
                        LDFLAGS:
                     H5_LDFLAGS:
                     AM_LDFLAGS:
          Extra libraries: -lz -ldl -lm
                  Archiver: ar
                Ranlib: ranlib
          Debugged Packages:
               API Tracing: no

Languages:
----------
                        Fortran: yes
               Fortran Compiler: /prod/acs/openmpi/xl/1.10.2/bin/mpifort ( IBM XL Fortran 15.01.0003.0000)
          Fortran 2003 Compiler:
                  Fortran Flags:
               H5 Fortran Flags:
               AM Fortran Flags:
         Shared Fortran Library: no
         Static Fortran Library: yes

                            C++: no

Features:
---------
                  Parallel HDF5: yes
             High Level library: yes
                   Threadsafety: no
            Default API Mapping: v18
With Deprecated Public Symbols: yes
         I/O filters (external): deflate(zlib)
                            MPE:
                     Direct VFD: no
                        dmalloc: no
Clear file buffers before write: yes
           Using memory checker: no
         Function Stack Tracing: no
      Strict File Format Checks: no
   Optimization Instrumentation: no

I copied the file ibm-flags to a file called "powerpc64le-unknown-linux-gnu" in the config directory.

For the following optimisation settings:
CFLAGS=""
CFLAGS="-O0"
CFLAGS="=-O0 -qarch=auto"

I'm getting a failure in the dt_arith check:

====================================================================================================
Testing hard unsigned short -> long double conversions PASSED
Testing hard int -> long double conversions PASSED
Testing hard unsigned int -> long double conversions PASSED
Testing hard long -> long double conversions *FAILED*
    elmt 107:
        src = 00 3f ff ff ff ff ff ff 18014398509481983
        dst = 00 00 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481984.000000
        ans = bf f0 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481983.000000
    elmt 109:
        src = 00 7f ff ff ff ff ff ff 36028797018963967
        dst = 00 00 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963968.000000
        ans = bf f0 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963967.000000
    elmt 111:
        src = 00 ff ff ff ff ff ff ff 72057594037927935
        dst = 00 00 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927936.000000
        ans = bf f0 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927935.000000
    elmt 113:
        src = 01 ff ff ff ff ff ff ff 144115188075855871
        dst = 00 00 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855872.000000
        ans = bf f0 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855871.000000
    elmt 115:
        src = 03 ff ff ff ff ff ff ff 288230376151711743
        dst = 00 00 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711744.000000
        ans = bf f0 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711743.000000
    elmt 117:
        src = 07 ff ff ff ff ff ff ff 576460752303423487
        dst = 00 00 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423488.000000
        ans = bf f0 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423487.000000
    elmt 119:
        src = 0f ff ff ff ff ff ff ff 1152921504606846975
        dst = 00 00 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846976.000000
        ans = bf f0 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846975.000000
    elmt 121:
        src = 1f ff ff ff ff ff ff ff 2305843009213693951
        dst = 00 00 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693952.000000
        ans = bf f0 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693951.000000
    elmt 123:
        src = 3f ff ff ff ff ff ff ff 4611686018427387903
        dst = 00 00 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387904.000000
        ans = bf f0 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387903.000000
    elmt 125:
        src = 7f ff ff ff ff ff ff ff 9223372036854775807
        dst = 00 00 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775808.000000
        ans = bf f0 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775807.000000
Testing hard unsigned long -> long double conversions *FAILED*
    elmt 107:
        src = 00 3f ff ff ff ff ff ff 18014398509481983
        dst = 00 00 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481984.000000
        ans = bf f0 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481983.000000
    elmt 109:
        src = 00 7f ff ff ff ff ff ff 36028797018963967
        dst = 00 00 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963968.000000
        ans = bf f0 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963967.000000
    elmt 111:
        src = 00 ff ff ff ff ff ff ff 72057594037927935
        dst = 00 00 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927936.000000
        ans = bf f0 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927935.000000
    elmt 113:
        src = 01 ff ff ff ff ff ff ff 144115188075855871
        dst = 00 00 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855872.000000
        ans = bf f0 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855871.000000
    elmt 115:
        src = 03 ff ff ff ff ff ff ff 288230376151711743
        dst = 00 00 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711744.000000
        ans = bf f0 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711743.000000
    elmt 117:
        src = 07 ff ff ff ff ff ff ff 576460752303423487
        dst = 00 00 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423488.000000
        ans = bf f0 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423487.000000
    elmt 119:
        src = 0f ff ff ff ff ff ff ff 1152921504606846975
        dst = 00 00 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846976.000000
        ans = bf f0 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846975.000000
    elmt 121:
        src = 1f ff ff ff ff ff ff ff 2305843009213693951
        dst = 00 00 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693952.000000
        ans = bf f0 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693951.000000
    elmt 123:
        src = 3f ff ff ff ff ff ff ff 4611686018427387903
        dst = 00 00 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387904.000000
        ans = bf f0 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387903.000000
    elmt 125:
        src = 7f ff ff ff ff ff ff ff 9223372036854775807
        dst = 00 00 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775808.000000
        ans = bf f0 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775807.000000
    elmt 127:
        src = ff ff ff ff ff ff ff ff 18446744073709551615
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = bf f0 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551615.000000
    elmt 128:
        src = ff ff ff ff ff ff ff ff 18446744073709551615
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = bf f0 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551615.000000
    elmt 129:
        src = ff ff ff ff ff ff ff fe 18446744073709551614
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551614.000000
    elmt 130:
        src = ff ff ff ff ff ff ff fc 18446744073709551612
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 10 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551612.000000
    elmt 131:
        src = ff ff ff ff ff ff ff f8 18446744073709551608
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 20 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551608.000000
    elmt 132:
        src = ff ff ff ff ff ff ff f0 18446744073709551600
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 30 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551600.000000
    elmt 133:
        src = ff ff ff ff ff ff ff e0 18446744073709551584
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 40 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551584.000000
    elmt 134:
        src = ff ff ff ff ff ff ff c0 18446744073709551552
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 50 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551552.000000
    elmt 135:
        src = ff ff ff ff ff ff ff 80 18446744073709551488
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 60 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551488.000000
    elmt 136:
        src = ff ff ff ff ff ff ff 00 18446744073709551360
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 70 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551360.000000
    elmt 137:
        src = ff ff ff ff ff ff fe 00 18446744073709551104
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 80 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551104.000000
    elmt 138:
        src = ff ff ff ff ff ff fc 00 18446744073709550592
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 90 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709550592.000000
Testing hard normalized float -> signed char conversions PASSED
Testing hard normalized double -> signed char conversions PASSED
Testing hard normalized float -> unsigned char conversions PASSED

For the following optimisation settings CFLGAS="-O2" and above, I get a similar error to above, except for it crashing after the first FAILED test:

Testing hard unsigned short -> long double conversions PASSED
Testing hard int -> long double conversions PASSED
Testing hard unsigned int -> long double conversions PASSED
Testing hard long -> long double conversions *FAILED*
    elmt 107:
        src = 00 3f ff ff ff ff ff ff 18014398509481983
        dst = 00 00 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481984.000000
        ans = bf f0 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481983.000000
    elmt 109:
        src = 00 7f ff ff ff ff ff ff 36028797018963967
        dst = 00 00 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963968.000000
        ans = bf f0 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963967.000000
    elmt 111:
        src = 00 ff ff ff ff ff ff ff 72057594037927935
        dst = 00 00 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927936.000000
        ans = bf f0 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927935.000000
    elmt 113:
        src = 01 ff ff ff ff ff ff ff 144115188075855871
        dst = 00 00 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855872.000000
        ans = bf f0 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855871.000000
    elmt 115:
        src = 03 ff ff ff ff ff ff ff 288230376151711743
        dst = 00 00 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711744.000000
        ans = bf f0 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711743.000000
    elmt 117:
        src = 07 ff ff ff ff ff ff ff 576460752303423487
        dst = 00 00 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423488.000000
        ans = bf f0 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423487.000000
    elmt 119:
        src = 0f ff ff ff ff ff ff ff 1152921504606846975
        dst = 00 00 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846976.000000
        ans = bf f0 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846975.000000
    elmt 121:
        src = 1f ff ff ff ff ff ff ff 2305843009213693951
        dst = 00 00 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693952.000000
        ans = bf f0 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693951.000000
    elmt 123:
        src = 3f ff ff ff ff ff ff ff 4611686018427387903
        dst = 00 00 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387904.000000
        ans = bf f0 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387903.000000
    elmt 125:
        src = 7f ff ff ff ff ff ff ff 9223372036854775807
        dst = 00 00 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775808.000000
        ans = bf f0 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775807.000000
Testing hard unsigned long -> long double conversions 0.07user 0.02system 0:009elapsed 98%CPU
(0avgtext+0avgdata 9984maxresident)k
0inputs+512outputs (0major+4007minor)pagefaults 0swaps
Make[4]: *** [dt_arith.chkexe_] Error 1

Testing dtypes
etc
etc.

Has anyone got any suggestions for a solution?

Kind regards,

Chris Nelson.

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2

That test performs all kinds of undefined behaviour, you can see it fail everyday here:
<https://cdash.hdfgroup.org/testSummary.php?project=2&name=H5TEST-dt_arith&date=2016-08-08>

It's been discussed on-list in the past. It seems no one cares to fix it.

Cheers,

···

On Mon, 8 Aug 2016 15:11:27 +0000, Chris.Nelson@awe.co.uk said:

I'm getting a failure in the dt_arith check:

--
____________________________________________________________
Sean McBride, B. Eng sean@rogue-research.com
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada

3

Hi Chris,

There is a known issue with the 'long long conversion' test. It fails on several platforms. Run make check with the -i (dash eye) option to ignore errors and redirect the output to a file.
If you look at the output file and that is the only test that fails, then your installation should be okay.

-Barbara
help@hdfgroup.org

···

From: Hdf-forum [mailto:hdf-forum-bounces@lists.hdfgroup.org] On Behalf Of Chris.Nelson@awe.co.uk
Sent: Monday, August 08, 2016 10:11 AM
To: hdf-forum@lists.hdfgroup.org
Subject: [Hdf-forum] IBM Power8 dt_arith error

Hi All,

I'm compiling HDF5.1.8.17 on an IBM power8 machine. The configure command is:
'CC="mpicc" CXX="mpiCC" FC="mpifort" F90="mpif90" F77="mpif77" CFLAGS="-O0" CXXFLAGS=" -DMPICH_IGNORE_CXX_SEEK" F90FLAGS=" " FFLAGS=" " ./configure --prefix=/prod/acs/prod/IRIS/POWER8/xl-13.1.3/serial/external/hdf5/1.8.17 --with-zlib --disable-shared --enable-fortran --enable-parallel --enable-linux-lfs --enable-production --enable-static'

Summary from the configure output:
SUMMARY OF THE HDF5 CONFIGURATION
         =================================

General Information:
-------------------
              HDF5 Version: 1.8.17
             Configured on: Thu Aug 4 09:18:16 BST 2016
             Configured by: usid@machine.awe.co.uk<mailto:usid@machine.awe.co.uk>
          Configure mode: production
               Host system: powerpc64le-unknown-linux-gnu
           Uname information: Linux machine.awe.co.uk 3.10.0-327.el7.ppc64le #1 SMP Thu Oct 29 17:31:13 EDT 2015 ppc64le ppc64le ppc64le GNU/Linux
                  Byte sex: little-endian
                 Libraries: static
          Installation point: /prod/acs/prod/IRIS/POWER8/xl-13.1.3/serial/external/hdf5/1.8.17

Compiling Options:
------------------
               Compilation Mode: production
                     C Compiler: /prod/acs/openmpi/xl/1.10.2/bin/mpicc ( IBM XL C/C++ 13.01.0003.0000)
                         CFLAGS: -O0
                      H5_CFLAGS: -qlanglvl=stdc99 -qflag=w:w
                      AM_CFLAGS:
                       CPPFLAGS:
                    H5_CPPFLAGS: -D_GNU_SOURCE -D_POSIX_C_SOURCE=200112L -DNDEBUG -UH5_DEBUG_API
                    AM_CPPFLAGS:
               Shared C Library: no
               Static C Library: yes
  Statically Linked Executables: no
                        LDFLAGS:
                     H5_LDFLAGS:
                     AM_LDFLAGS:
          Extra libraries: -lz -ldl -lm
                  Archiver: ar
                Ranlib: ranlib
          Debugged Packages:
               API Tracing: no

Languages:
----------
                        Fortran: yes
               Fortran Compiler: /prod/acs/openmpi/xl/1.10.2/bin/mpifort ( IBM XL Fortran 15.01.0003.0000)
          Fortran 2003 Compiler:
                  Fortran Flags:
               H5 Fortran Flags:
               AM Fortran Flags:
         Shared Fortran Library: no
         Static Fortran Library: yes

                            C++: no

Features:
---------
                  Parallel HDF5: yes
             High Level library: yes
                   Threadsafety: no
            Default API Mapping: v18
With Deprecated Public Symbols: yes
         I/O filters (external): deflate(zlib)
                            MPE:
                     Direct VFD: no
                        dmalloc: no
Clear file buffers before write: yes
           Using memory checker: no
         Function Stack Tracing: no
      Strict File Format Checks: no
   Optimization Instrumentation: no

I copied the file ibm-flags to a file called "powerpc64le-unknown-linux-gnu" in the config directory.

For the following optimisation settings:
CFLAGS=""
CFLAGS="-O0"
CFLAGS="=-O0 -qarch=auto"

I'm getting a failure in the dt_arith check:

====================================================================================================
Testing hard unsigned short -> long double conversions PASSED
Testing hard int -> long double conversions PASSED
Testing hard unsigned int -> long double conversions PASSED
Testing hard long -> long double conversions *FAILED*
    elmt 107:
        src = 00 3f ff ff ff ff ff ff 18014398509481983
        dst = 00 00 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481984.000000
        ans = bf f0 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481983.000000
    elmt 109:
        src = 00 7f ff ff ff ff ff ff 36028797018963967
        dst = 00 00 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963968.000000
        ans = bf f0 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963967.000000
    elmt 111:
        src = 00 ff ff ff ff ff ff ff 72057594037927935
        dst = 00 00 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927936.000000
        ans = bf f0 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927935.000000
    elmt 113:
        src = 01 ff ff ff ff ff ff ff 144115188075855871
        dst = 00 00 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855872.000000
        ans = bf f0 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855871.000000
    elmt 115:
        src = 03 ff ff ff ff ff ff ff 288230376151711743
        dst = 00 00 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711744.000000
        ans = bf f0 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711743.000000
    elmt 117:
        src = 07 ff ff ff ff ff ff ff 576460752303423487
        dst = 00 00 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423488.000000
        ans = bf f0 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423487.000000
    elmt 119:
        src = 0f ff ff ff ff ff ff ff 1152921504606846975
        dst = 00 00 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846976.000000
        ans = bf f0 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846975.000000
    elmt 121:
        src = 1f ff ff ff ff ff ff ff 2305843009213693951
        dst = 00 00 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693952.000000
        ans = bf f0 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693951.000000
    elmt 123:
        src = 3f ff ff ff ff ff ff ff 4611686018427387903
        dst = 00 00 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387904.000000
        ans = bf f0 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387903.000000
    elmt 125:
        src = 7f ff ff ff ff ff ff ff 9223372036854775807
        dst = 00 00 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775808.000000
        ans = bf f0 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775807.000000
Testing hard unsigned long -> long double conversions *FAILED*
    elmt 107:
        src = 00 3f ff ff ff ff ff ff 18014398509481983
        dst = 00 00 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481984.000000
        ans = bf f0 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481983.000000
    elmt 109:
        src = 00 7f ff ff ff ff ff ff 36028797018963967
        dst = 00 00 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963968.000000
        ans = bf f0 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963967.000000
    elmt 111:
        src = 00 ff ff ff ff ff ff ff 72057594037927935
        dst = 00 00 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927936.000000
        ans = bf f0 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927935.000000
    elmt 113:
        src = 01 ff ff ff ff ff ff ff 144115188075855871
        dst = 00 00 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855872.000000
        ans = bf f0 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855871.000000
    elmt 115:
        src = 03 ff ff ff ff ff ff ff 288230376151711743
        dst = 00 00 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711744.000000
        ans = bf f0 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711743.000000
    elmt 117:
        src = 07 ff ff ff ff ff ff ff 576460752303423487
        dst = 00 00 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423488.000000
        ans = bf f0 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423487.000000
    elmt 119:
        src = 0f ff ff ff ff ff ff ff 1152921504606846975
        dst = 00 00 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846976.000000
        ans = bf f0 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846975.000000
    elmt 121:
        src = 1f ff ff ff ff ff ff ff 2305843009213693951
        dst = 00 00 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693952.000000
        ans = bf f0 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693951.000000
    elmt 123:
        src = 3f ff ff ff ff ff ff ff 4611686018427387903
        dst = 00 00 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387904.000000
        ans = bf f0 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387903.000000
    elmt 125:
        src = 7f ff ff ff ff ff ff ff 9223372036854775807
        dst = 00 00 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775808.000000
        ans = bf f0 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775807.000000
    elmt 127:
        src = ff ff ff ff ff ff ff ff 18446744073709551615
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = bf f0 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551615.000000
    elmt 128:
        src = ff ff ff ff ff ff ff ff 18446744073709551615
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = bf f0 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551615.000000
    elmt 129:
        src = ff ff ff ff ff ff ff fe 18446744073709551614
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551614.000000
    elmt 130:
        src = ff ff ff ff ff ff ff fc 18446744073709551612
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 10 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551612.000000
    elmt 131:
        src = ff ff ff ff ff ff ff f8 18446744073709551608
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 20 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551608.000000
    elmt 132:
        src = ff ff ff ff ff ff ff f0 18446744073709551600
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 30 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551600.000000
    elmt 133:
        src = ff ff ff ff ff ff ff e0 18446744073709551584
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 40 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551584.000000
    elmt 134:
        src = ff ff ff ff ff ff ff c0 18446744073709551552
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 50 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551552.000000
    elmt 135:
        src = ff ff ff ff ff ff ff 80 18446744073709551488
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 60 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551488.000000
    elmt 136:
        src = ff ff ff ff ff ff ff 00 18446744073709551360
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 70 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551360.000000
    elmt 137:
        src = ff ff ff ff ff ff fe 00 18446744073709551104
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 80 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551104.000000
    elmt 138:
        src = ff ff ff ff ff ff fc 00 18446744073709550592
        dst = 00 00 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709551616.000000
        ans = c0 90 00 00 00 00 00 00 43 f0 00 00 00 00 00 00 18446744073709550592.000000
Testing hard normalized float -> signed char conversions PASSED
Testing hard normalized double -> signed char conversions PASSED
Testing hard normalized float -> unsigned char conversions PASSED

For the following optimisation settings CFLGAS="-O2" and above, I get a similar error to above, except for it crashing after the first FAILED test:

Testing hard unsigned short -> long double conversions PASSED
Testing hard int -> long double conversions PASSED
Testing hard unsigned int -> long double conversions PASSED
Testing hard long -> long double conversions *FAILED*
    elmt 107:
        src = 00 3f ff ff ff ff ff ff 18014398509481983
        dst = 00 00 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481984.000000
        ans = bf f0 00 00 00 00 00 00 43 50 00 00 00 00 00 00 18014398509481983.000000
    elmt 109:
        src = 00 7f ff ff ff ff ff ff 36028797018963967
        dst = 00 00 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963968.000000
        ans = bf f0 00 00 00 00 00 00 43 60 00 00 00 00 00 00 36028797018963967.000000
    elmt 111:
        src = 00 ff ff ff ff ff ff ff 72057594037927935
        dst = 00 00 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927936.000000
        ans = bf f0 00 00 00 00 00 00 43 70 00 00 00 00 00 00 72057594037927935.000000
    elmt 113:
        src = 01 ff ff ff ff ff ff ff 144115188075855871
        dst = 00 00 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855872.000000
        ans = bf f0 00 00 00 00 00 00 43 80 00 00 00 00 00 00 144115188075855871.000000
    elmt 115:
        src = 03 ff ff ff ff ff ff ff 288230376151711743
        dst = 00 00 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711744.000000
        ans = bf f0 00 00 00 00 00 00 43 90 00 00 00 00 00 00 288230376151711743.000000
    elmt 117:
        src = 07 ff ff ff ff ff ff ff 576460752303423487
        dst = 00 00 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423488.000000
        ans = bf f0 00 00 00 00 00 00 43 a0 00 00 00 00 00 00 576460752303423487.000000
    elmt 119:
        src = 0f ff ff ff ff ff ff ff 1152921504606846975
        dst = 00 00 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846976.000000
        ans = bf f0 00 00 00 00 00 00 43 b0 00 00 00 00 00 00 1152921504606846975.000000
    elmt 121:
        src = 1f ff ff ff ff ff ff ff 2305843009213693951
        dst = 00 00 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693952.000000
        ans = bf f0 00 00 00 00 00 00 43 c0 00 00 00 00 00 00 2305843009213693951.000000
    elmt 123:
        src = 3f ff ff ff ff ff ff ff 4611686018427387903
        dst = 00 00 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387904.000000
        ans = bf f0 00 00 00 00 00 00 43 d0 00 00 00 00 00 00 4611686018427387903.000000
    elmt 125:
        src = 7f ff ff ff ff ff ff ff 9223372036854775807
        dst = 00 00 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775808.000000
        ans = bf f0 00 00 00 00 00 00 43 e0 00 00 00 00 00 00 9223372036854775807.000000
Testing hard unsigned long -> long double conversions 0.07user 0.02system 0:009elapsed 98%CPU
(0avgtext+0avgdata 9984maxresident)k
0inputs+512outputs (0major+4007minor)pagefaults 0swaps
Make[4]: *** [dt_arith.chkexe_] Error 1

Testing dtypes
etc
etc.

Has anyone got any suggestions for a solution?

Kind regards,

Chris Nelson.

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