[PATCH v1 0/1] RISC-V: Nan-box the result of movbf on soft-bf16

[Xiao Zeng <zengxiao@eswincomputing.com>]

Compared to the initial patch:
<https://gcc.gnu.org/pipermail/gcc-patches/2024-May/650864.html>

1 Fixed the formatting issue, although the modified format can pass the
CI format check, it looks strange.

2 Due to CI not using the latest code for patch, the initial patch build failed.

3 V1 submission will trigger CI again, hoping to resolve this issue. If not, I will
send an email to the CI management personnel requesting them to manually run it.

4 For information about CI, you can refer to the following email conversation:
-----------------------------------------------------------------------------------------------
On 5/7/24 01:25, Xiao Zeng wrote:
> Hi, during the use of CI, I discovered a possible issue and am now providing feedback to you
>
> https://github.com/ewlu/gcc-precommit-ci/issues/1481
>
> The RISCV_Nanbox_the_result_of_movbf_on_softbf16 relies on the mainline with a CommitID
> of <8c7cee80eb50792e57d514be1418c453ddd1073e>, but in CI, <ec1cdad> is used as the
> parent CommitID, which obviously leads to patch compilation failure.
>
> Expect that each CI is performed on the latest code.
>
> Of course, perhaps there are other considerations here.
>
> How can I operate to enable CI to use the latest mainline code?
>
> Looking forward to your reply very much.
>
> Thanks
> Xiao Zeng
>
Hi Xiao,

Thanks for reaching out.

Currently we rely on postcommit generate a baseline of known failures:

https://github.com/patrick-rivos/gcc-postcommit-ci/issues

Precommit then applies patches to that same baseline hash and compares
the results.

We don't currently have enough compute to generate a baseline for each
patch sent to the mailing list. We'll be asking for more compute from
the RISE project in the next week or so to allow us to use the most
recent GCC hash.

What you noticed yesterday was a bad change to the postcommit-CI which
prevented a new baseline from being generated.

It's expected that precommit uses a ~8 hour old commit as a baseline. If
a patch ever requires a recent commit, feel free to email us and we'll
rerun the precommit CI once a new baseline exists.

We should have a new baseline in ~8 hours and I'll rerun your patch for
you once that happens.

Thanks,
Patrick
-----------------------------------------------------------------------------------------------

Xiao Zeng (1):
  RISC-V: Nan-box the result of movbf on soft-bf16

 gcc/config/riscv/riscv.cc                     | 51 ++++++++++---------
 gcc/config/riscv/riscv.md                     | 12 ++++-
 .../gcc.target/riscv/_Bfloat16-nanboxing.c    | 38 ++++++++++++++
 3 files changed, 76 insertions(+), 25 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/riscv/_Bfloat16-nanboxing.c

-- 
2.17.1