GSoC 2019: POSIX Compliance - FENV Environment probably not working properly in RISCV

[Vaibhav Gupta]

On Wed, Aug 14, 2019, 8:09 PM Joel Sherrill <joel at rtems.org> wrote:

> On Wed, Aug 14, 2019 at 9:35 AM Vaibhav Gupta <vaibhavgupta40 at gmail.com>
> wrote:
> >
> > You are also getting same error :(
> > I thought problem is with my system/laptop and was trying to correct
> things.
> > Should we take the discussion to newlib?
>
> I would like Jiri and Hesham to chime in on the next step. I don't
> know the RISC-V
> well enough to say if this is a bug in risc-v fenv or not.
>
Okay

>
> Keep plugging at another architecture.
>
On that!

>
> --joel
>
> >
> > Vaibhav Gupta
> >
> > On Wed, Aug 14, 2019 at 7:51 PM Joel Sherrill <joel at rtems.org> wrote:
> >>
> >>
> >> I ran it on sis built from the git repository. Unfortunately, the
> output doesn't match that I got on Linux.
> >>
> >> =============================
> >> $ ~/sis-riscv/install/bin/sis -riscv -gdb
> >>
> >>  SIS - SPARC/RISCV instruction simulator 2.17,  copyright Jiri Gaisler
> 2019
> >>  Bug-reports to jiri at gaisler.se
> >>
> >>  RISCV emulation enabled, 1 cpus online, delta 50 clocks
> >>
> >> gdb: listening on port 1234 connected
> >> X40000000,0:#72
> >>
> >>
> >> *** BEGIN OF TEST PSXFENV 01 ***
> >> *** TEST VERSION: 5.0.0.a4d7e4cee77d16b0e34ef543f0804e7eb2954137
> >> *** TEST STATE: EXPECTED-PASS
> >> *** TEST BUILD: RTEMS_POSIX_API
> >> *** TEST TOOLS: 9.1.0 20190503 (RTEMS 5, RSB
> be90fb89678206e469f2f9189eb290cec49fd827, Newlib 6661a67)
> >>
> >> Divide by zero and confirm fetestexcept().
> >>
> >> 8
> >> 0
> >> 1
> >>
> >> *** END OF TEST PSXFENV 01 ***
> >>
> >>
> >> *** FATAL ***
> >> fatal source: 5 (RTEMS_FATAL_SOURCE_EXIT)
> >> fatal code: 0 (0x00000000)
> >> RTEMS version: 5.0.0.a4d7e4cee77d16b0e34ef543f0804e7eb2954137
> >> RTEMS tools: 9.1.0 20190503 (RTEMS 5, RSB
> be90fb89678206e469f2f9189eb290cec49fd827, Newlib 6661a67)
> >> executing thread ID: 0x08a010001
> >> executing thread name: UI1
> >> =============================
> >> On Wed, Aug 14, 2019 at 7:55 AM Vaibhav Gupta <vaibhavgupta40 at gmail.com>
> wrote:
> >>>
> >>>
> >>>
> >>> On Wed, Aug 14, 2019 at 6:22 PM Hesham Almatary <
> heshamelmatary at gmail.com> wrote:
> >>>>
> >>>> On Sun, 11 Aug 2019 at 16:49, Vaibhav Gupta <vaibhavgupta40 at gmail.com>
> wrote:
> >>>> >
> >>>> > Configure command I used to build BSP:
> >>>> > ==============================================
> >>>> > $ /home/varodek/development/rtems/kernel/rtems/configure
> --prefix=/home/varodek/development/rtems/5 --enable-maintainer-mode
> --target=riscv-rtems5 --enable-rtemsbsp=rv32imac --enable-tests
> --enable-posix --disable-networking --enable-cxx RISCV_ENABLE_HTIF_SUPPORT=1
> >>>> > ==============================================
> >>>> > .
> >>>> RISCV_ENABLE_HTIF_SUPPORT=1 should only be used if you're going to run
> >>>> on a Spike platform. I see you're using virt below
> >>>
> >>> Yah this was the time I was doing all kind of experiments to run the
> hello  world thing.
> >>> I have disabled HTIF now.
> >>>>
> >>>>
> >>>> > .
> >>>> > .
> >>>> > .
> >>>> > Qemu command I used to run test:
> >>>> > ==============================================
> >>>> > $ qemu-system-riscv32 -no-reboot -nographic -machine virt -m 256M
> -kernel psxfenv01.exe
> >>>> > ==============================================
> >>>> > .
> >>>> > .
> >>>> > .
> >>>> > .
> >>>> > Makefile.am
> >>>> > ==============================================
> >>>> > + if TEST_psxfenv01
> >>>> > + psx_tests += psxfenv01
> >>>> > + psxfenv01_SOURCES = psxfenv01/init.c
> >>>> > + psxfenv01_CPPFLAGS = $(AM_CPPFLAGS) $(TEST_FLAGS_psxfenv01) \
> >>>> > +       $(support_includes)
> >>>> > + psxfenv01_LDADD = -lm $(LDADD)
> >>>> > + endif
> >>>> > +
> >>>> > ==============================================
> >>>> >
> >>>> > On Sun, Aug 11, 2019 at 8:36 PM Vaibhav Gupta <
> vaibhavgupta40 at gmail.com> wrote:
> >>>> >>
> >>>> >> My code of testsuite:
> >>>> >> ===============================================
> >>>> >>   /* Test 'FE_DIVBYZERO' */
> >>>> >>   puts( "\nDivide by zero and confirm fetestexcept()." );
> >>>> >>   a = 0.0;
> >>>> >>   b = 1.0;
> >>>> >>   c = b/a;
> >>>> >>   printf("\n%d",FE_DIVBYZERO);
> >>>> >>   fegetexceptflag(&excepts,FE_ALL_EXCEPT);
> >>>> >>   printf("\n%d",excepts);
> >>>> >>   r = feraiseexcept(FE_DIVBYZERO);
> >>>> >>   printf("\n%d\n",r);
> >>>> >>   rtems_test_assert( fetestexcept( FE_DIVBYZERO ) );
> >>>> >> ==============================================
> >>>> >> OUTPUT
> >>>> >> ==============================================
> >>>> >> Divide by zero and confirm fetestexcept().
> >>>> >>
> >>>> >> 8
> >>>> >> 0
> >>>> >> 1
> >>>> >>
> /home/varodek/development/rtems/kernel/rtems/c/src/../../testsuites/psxtests/psxfenv01/init.c:
> 84 fetestexcept( FE_DIVBYZERO )
> >>>> >> ==============================================
> >>>> >> EXPECTED OUTPUT
> >>>> >> ==============================================
> >>>> >> Divide by zero and confirm fetestexcept().
> >>>> >>
> >>>> >> 8
> >>>> >> 8
> >>>> >> 0
> >>>> >> ==============================================
> >>>> >> - fetestexcept( FE_DIVBYZERO ), should return a non-zero value as
> division-by-zero was performed.
> >>>> >> .
> >>>> >> - feraiseexcept(FE_DIVBYZERO); is also not working. It should
> return zero when successful
> >>>> >> .
> >>>> >> ==============================================
> >>>> >>
> >>>> >> Thank You
> >>>> >> Vaibhav Gupta
> >>>> >>
> >>>> > _______________________________________________
> >>>> > devel mailing list
> >>>> > devel at rtems.org
> >>>> > http://lists.rtems.org/mailman/listinfo/devel
> >>>>
> >>>> --
> >>>> Hesham
> >>>
> >>> _______________________________________________
> >>> devel mailing list
> >>> devel at rtems.org
> >>> http://lists.rtems.org/mailman/listinfo/devel
>
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