[PATCH] riscv: Improve sbi_ecall() code generation by reordering arguments

Alexandre Ghiti alexghiti at rivosinc.com
Sun Mar 24 11:19:56 PDT 2024


Hi Qingfang,

On Sat, Mar 23, 2024 at 7:26 AM Qingfang Deng <dqfext at gmail.com> wrote:
>
> Hi Alexandre,
>
> You can simply make sbi_ecall `__always_inline`, so the C function call
> overhead can be fully avoided.

I understand your point, though I don't think we need to mark
sbi_ecall() as inline, it's not in any hot path so it's not worth it.
This patch simply gets rid of a really useless overhead, but it does
not visibly accelerate anything.

I hope it makes sense,

Thanks,

Alex



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