[RISCV] RISC-V GNU Toolchain Biweekly Sync-up call (Jan 13, 2022)

[Palmer Dabbelt]

On Wed, 12 Jan 2022 05:48:41 PST (-0800), jiawei@iscas.ac.cn wrote:
> Hi all,
>
> There is an agenda for tomorrow's meeting. If you have topics to
> discuss or share, please let me know and I can add them to the agenda.

We should also talk about the ABI spec, we've now got a handful of 
incompatibilites between it and the binaries we currently 
generate/accept.

>
> Agenda:
> -  -misa-spec related issue:
>     - Bump default ISA spec to newer version, current default ISA spec
> is 2.2, but it's already out-of-date for a long time
>         - The most impact is I ext. will bump to  2.1, which is
> backward incompatible with 2.0,  I 2.1 has split csr instruction to
> zicsr ext. and ifence.i  to zifencei ext., that might break some
> existing build script.
>     - Discuss new scheme for -misa-spec or alternative scheme for
> dealing with RISC-V profile
>
> -  Interaction between -march and RISC-V profile[1].
>     - Introduce -mprofile option: -mprofile=rvm20 + -march=rv32gc
>     - Or extend syntax of -march option like -march=rvm20+mafdc?
>
>
>
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>
>
> -  RISC-V subextension  related implement progress
>
> [1] Note: What is RISC-V Profile: https://github.com/riscv/riscv-profiles/
>
> Wei Wu - PLCT Lab is inviting you to a scheduled Zoom meeting.
>
> Topic: RISC-V GNU Toolchain Biweekly Sync-up
>
> Join Zoom Meeting
> https://zoom.com.cn/j/89393600951?pwd=ZFpWMkZ6Tm1TbUFXT1hZZjZZMHhRQT09
>
> Meeting ID: 893 9360 0951
> Passcode: 899662
>
> BEIJING, China
> 11:00p    Thu, Jan 13 2022
> 12:00a    Fri, Jan 13 2022
>
> PST/PDT, Pacific Standard Time (US)
> 7:00a    Thu, Jan 13 2022
> 8:00a    Thu, Jan 13 2022
>
> PHILADELPHIA, United States, Pennsylvania
> 10:00a    Thu, Jan 13 2022
> 11:00a    Thu, Jan 13 2022