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Re: [Patch-86512]: Subnormal float support in armv7(with -msoft-float) for intrinsics


Reminder !!!

~Umesh


On Wed, Jul 18, 2018 at 6:01 PM, Umesh Kalappa <umesh.kalappa0@gmail.com> wrote:
> Hi Nagy/Ramana,
>
> Please help us to review the attached patch and do let me know your comments .
>
> No regress in the  gcc.target  suite for arm target.
>
> Thank you
> ~Umesh
>
> On Tue, Jul 17, 2018 at 4:01 PM, Umesh Kalappa <umesh.kalappa0@gmail.com> wrote:
>> Will do, thanks.
>> Thanks
>>
>> On Tue, Jul 17, 2018, 3:24 PM Ramana Radhakrishnan
>> <ramana.gcc@googlemail.com> wrote:
>>>
>>> On Tue, Jul 17, 2018 at 10:41 AM, Umesh Kalappa
>>> <umesh.kalappa0@gmail.com> wrote:
>>> > Hi Nagy,
>>> >
>>> > Please  help us with your comments on the attached patch for the issue
>>> > (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86512)
>>> >
>>> > Thank you and waiting for your inputs on the same.
>>>
>>>
>>> Patches should be sent to gcc-patches@gcc.gnu.org with a clear
>>> description of what the patch hopes to
>>> achieve and why this is correct, how was it tested and if a regression
>>> test needs to be added - add one please.
>>> Please read https://gcc.gnu.org/contribute.html before sending a patch.
>>>
>>> This is the wrong list to send patches to.
>>>
>>> regards
>>> Ramana
>>> > ~Umesh
>>> >
>>> > On Fri, Jul 13, 2018 at 1:22 PM, Umesh Kalappa
>>> > <umesh.kalappa0@gmail.com> wrote:
>>> >> Thank you and issue  raised at
>>> >> gcc-patches@gcc.gnu.org
>>> >>
>>> >> ~Umesh
>>> >>
>>> >> On Thu, Jul 12, 2018 at 9:33 PM, Szabolcs Nagy <szabolcs.nagy@arm.com>
>>> >> wrote:
>>> >>> On 12/07/18 16:20, Umesh Kalappa wrote:
>>> >>>>
>>> >>>> Hi everyone,
>>> >>>>
>>> >>>> we have our source base ,that was compiled for armv7 on gcc8.1 with
>>> >>>> soft-float and for following input
>>> >>>>
>>> >>>> a=0x0010000000000000
>>> >>>> b=0x0000000000000001
>>> >>>>
>>> >>>>   result = a - b ;
>>> >>>>
>>> >>>> we are getting the result as "0x000ffffffffffffe" and with
>>> >>>> -mhard-float (disabled the flush to zero mode ) we are getting the
>>> >>>> result as ""0x000fffffffffffff" as expected.
>>> >>>>
>>> >>>
>>> >>> please submit it as a bug report to bugzilla
>>> >>>
>>> >>>
>>> >>>> while debugging the soft-float code,we see that ,the compiler calls
>>> >>>> the intrinsic "__aeabi_dsub" with arm calling conventions i.e passing
>>> >>>> "a" in r0 and r1 registers and respectively for "b".
>>> >>>>
>>> >>>> we are investigating the routine "__aeabi_dsub" that comes from
>>> >>>> libgcc
>>> >>>> for incorrect result  and meanwhile we would like to know that
>>> >>>>
>>> >>>> a)do libgcc routines/intrinsic for float operations support or
>>> >>>> consider the subnormal values ? ,if so how we can enable the same.
>>> >>>>
>>> >>>> Thank you
>>> >>>> ~Umesh
>>> >>>>
>>> >>>


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