Re: [Qemu-devel] [Bug 1759264] Re: fpu/softfloat: round_to_int_and_pack refactor broke TriCore ftoi insns

["Alex Bennée" <alex.bennee@linaro.org>]

Bastian Koppelmann <kbastian@mail.uni-paderborn.de> writes:

> On 04/11/2018 01:01 PM, Alex Bennée wrote:
>> Bastian Koppelmann <kbastian@mail.uni-paderborn.de> writes:
>>
>>> On 04/10/2018 10:07 PM, Alex Bennée wrote:
>>>> Yeah it looks like it was missed, the round_to_uint code does it.
>>>>
>>>> Do you have a test case I can verify?
>>>>
>>>
>>> For the NaN input 0xffffffff the expected result for the flags is that
>>> flag_invalid is raised.
>>>
>>> I can provide you with some TriCore asm, but it is a bit of pain to get
>>> the gnu assembler to build, since the public version is a decade old.
>>
>> I'll trust you if you send me a static binary for this particular
>> verification ;-)
>
> I set up a github repo with working binutils and the corresponding
> testcase:
>
> https://github.com/bkoppelmann/tricore-fpu
>
> The one caveat is, that we cannot produce any binaries with the TriCore
> ISA > 1.3.
>
> In this testcase the last ftoi instruction is supposed to raise the
> invalid flag and return 0 since the input was NaN. We did that by only
> checking for NaN if any flag was raised after ftoi, then do the NaN
> check, and if positive, return 0.

Well it builds and I get an fpu-test.elf but I'm a bit stuck on how to
run it. What are the runes for launching the test?

>
> Cheers,
> Bastian


--
Alex Bennée