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

Wed Aug 14 15:30:02 UTC 2019

On Wed, Aug 14, 2019 at 8:56 PM Hesham Almatary <heshamelmatary at gmail.com>
wrote:

> On Wed, 14 Aug 2019 at 16:18, Vaibhav Gupta <vaibhavgupta40 at gmail.com>
> wrote:
> >
> >
> >
> > 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
>
> Can you try to build a BSP with FPU instructions? rv32imafdc? and test
> again? I assume this will eventually do FPU calculations that will
> emit FPU instructions in the case of rv32imafdc or softfloat in the
> case of rv32imac.
>
Okay I will try this direction too then.

>
> >>
> >>
> >> 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
>
>
>
> --
> Hesham
>
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