Re: [PATCH v2 0/3] RISC-V: Add stub support for existing extensions

[Tsukasa OI <research_trasio@irq.a4lg.com>]

Hi,

I'll explain a little more background.

A major case which this patch set will be required is when a developer
use inline assembly for instructions not yet natively supported by GCC
or will not be supported as intrinsics.

On such cases, GCC should at least accept corresponding extension via
-march (although there's a workaround using ".option" directives in the
inline assembly but that's tedious).

Thanks,
Tsukasa


On 2023/08/14 15:09, Tsukasa OI wrote:
> PATCH v1:
> <https://gcc.gnu.org/pipermail/gcc-patches/2023-August/627220.html>
> 
> 
> Changes: v1 -> v2 (only in PATCH 3/3)
> ======================================
> 
> Removed: 'Zvkn' -> 'Zvknha' implication (not to cause test failure)
> Added:   'Zfa' -> 'F' implication (just I forgot to add in PATCH v1)
> 
> 
> Thanks,
> Tsukasa
> 
> 
> 
> 
> Tsukasa OI (3):
>   RISC-V: Add stub support for existing extensions (privileged)
>   RISC-V: Add stub support for existing extensions (vendor)
>   RISC-V: Add stub support for existing extensions (unprivileged)
> 
>  gcc/common/config/riscv/riscv-common.cc    | 44 ++++++++++++++++++++++
>  gcc/testsuite/gcc.target/riscv/predef-29.c | 35 +++++++++++++++++
>  gcc/testsuite/gcc.target/riscv/predef-30.c | 27 +++++++++++++
>  gcc/testsuite/gcc.target/riscv/predef-31.c | 31 +++++++++++++++
>  4 files changed, 137 insertions(+)
>  create mode 100644 gcc/testsuite/gcc.target/riscv/predef-29.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/predef-30.c
>  create mode 100644 gcc/testsuite/gcc.target/riscv/predef-31.c
> 
> 
> base-commit: 614052dd4ea083e086712809c754ffebd9361316