Re: [PATCH 0/2] RISC-V: Add ratified 'E' base ISA support with draft ABIs

[jiawei@iscas.ac.cn]

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> Hi,

> 
> This patch set reflects the most of ratified 'E' base ISAs and
> draft/pre-draft RVE ABIs, ILP32E and LP64E.

> 
> RV32E / RV64E (ratified): The latest RISC-V ISA Manual
> <https://github.com/riscv/riscv-isa-manual/releases/tag/riscv-isa-release-1239329-2023-05-23>
> ILP32E (draft): RISCV ABIs Specification version 1.0
> <https://github.com/riscv-non-isa/riscv-elf-psabi-doc/releases/tag/v1.0>
> LP64E (pre-draft): Submission to add RVE API corresponding RV64E
> <https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/299>
> 
> Adding pre-draft LP64E would be a problem on GCC but I bet not on Binutils
> (ELF flags [to handle on Binutils/GAS] are not very detailed).
> 
> Note that this patch set does not reflect the version number of the 'E' base
> ISA (ratified version 2.0) because the latest ratified specification,
> "20191213", comes with the draft version 1.9 and adding the version 2.0 with
> ISA_SPEC_CLASS_DRAFT does not work (due to the default value of
> `DEFAULT_RISCV_ISA_SPEC'; note that it cannot be set to "draft").
> 
> I think the next unprivileged ISA specification release is the best timing
> to add 'E' version 2.0 (along with new ISA_SPEC_CLASS_20??????).
> 
> Thanks,
> Tsukasa
> 

Hi Tsukasa,




There was an earlier RFC submission by Palmer Dabbelt one years ago,
https://sourceware.org/pipermail/binutils/2022-July/121785.html
would you like to contact Palmer to move forward with this work?

> 
> 
> Tsukasa OI (2):
>   RISC-V: Remove RV64E conflict
>   RISC-V: Add "lp64e" ABI support
> 
>  bfd/elfxx-riscv.c                               | 7 -------
>  gas/config/tc-riscv.c                           | 4 +++-
>  gas/doc/c-riscv.texi                            | 5 ++---
>  gas/testsuite/gas/riscv/mabi-fail-rv32e-lp64d.l | 2 +-
>  gas/testsuite/gas/riscv/mabi-fail-rv32e-lp64f.l | 2 +-
>  gas/testsuite/gas/riscv/mabi-fail-rv32e-lp64q.l | 2 +-
>  gas/testsuite/gas/riscv/march-fail-base-02.d    | 3 ---
>  gas/testsuite/gas/riscv/march-fail-base-02.l    | 2 --
>  8 files changed, 8 insertions(+), 19 deletions(-)
>  delete mode 100644 gas/testsuite/gas/riscv/march-fail-base-02.d
>  delete mode 100644 gas/testsuite/gas/riscv/march-fail-base-02.l
> 
> 
> base-commit: 3dfee72010248aca5932a27b4c34d3b79ab9f057
> -- 
> 2.41.0