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

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.

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is 2.2, but it's already out-of-date for a long time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?








-  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