Re: [RFC PATCH] crypto: riscv: scalar accelerated GHASH

[Jeffrey Walton]

On Thu, Apr 17, 2025 at 3:25 AM Qingfang Deng <dqfext@xxxxxxxxx> wrote:
>
> Hi Ard,
>
> On Thu, Apr 17, 2025 at 2:58 PM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
> > [...]
> >
> > Also, do you need to test for int128 support? Or is that guaranteed
> > for all compilers that are supported by the RISC-V port?
>
> I believe int128 support is available for all 64-bit targets.

You can verify the compiler supports int128 with the following macro:

    #if (__SIZEOF_INT128__ >= 16)
    ...
    #endif

Also see <https://gcc.gnu.org/pipermail/gcc-help/2015-August/124862.html>.

Jeff