Hi, be might complement to the QP support for POWER in gcc 12, and I have actually thought about doing. The library has its gotchas, though - I do not suppose we can count on fp16 support for trigonometrics and similar, for example, so we would probably have to use fp32 and convert (or imlement a lookup table, which would be cache-unfriendly) Plus, there appears to be more than one format on ARM, but we should probably restrict ourselves to IEEE.
So, not a really small project, but an interesting one. Best regards Thomas > Am 16.05.2022 um 12: 50 schrieb Tobias Burnus <tobias_bur...@mentor.com>: > On 16.05.22 09:51, nkToon Moene wrote: >> Interesting question. We don't do that yet, as far as I know. >> -------- Forwarded Message -------- >> From: 陈刚 <cgl...@scu.edu.cn> >> >> I want to use fp16 in fortran, does gfortran support the fp16? > > I think adding fp16 to the compiler itself is not that difficult – it is > "just" handling 'HF' mode via 'REAL(kind=2)'; this can be done rather > quickly. > > @陈刚: If you want to volunteer to add it (know someone who does), I can > give some pointers.* > > Additionally support in the libgfortran run-time library should be added > and some testcases written to ensure it works. – I think that is also a > smaller task, but has to be done in addition. > > Tobias > > *See https://gcc.gnu.org/contribute.html for a starter – but if > interested, I will give explicit hints what needs to be changed how. > > > ----------------- > Siemens Electronic Design Automation GmbH; Anschrift: Arnulfstraße 201, 80634 > München; Gesellschaft mit beschränkter Haftung; Geschäftsführer: Thomas > Heurung, Frank Thürauf; Sitz der Gesellschaft: München; Registergericht > München, HRB 106955
