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

[Joel Sherrill]

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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