I will try that. Thanks for the fast response. On Fri, Sep 5, 2025 at 10:11 AM 'dmerc...@google.com' via v8-dev < v8-dev@googlegroups.com> wrote:
> Hi, > > > have a dynamic branch looking at the CPU feature in the generated > assembly. > > I would suggest to do this. > > You can look for instance at `IncsspqIfSupported` in builtins-x64.cc to > see how you can retrieve CpuFeatures at runtime from builtins. And another > example is the `supports_wasm_simd_128_address` external reference, used on > a few architectures. > > You should be able to do a similar thing with the CodeStubAssembler if > needed. > > Cheers, > Darius > > On Friday, September 5, 2025 at 9:48:15 AM UTC+2 floi...@rivosinc.com > wrote: > >> On RISC-V we need to store vector registers in the builtin >> Generate_WasmCompileLazy (and others). However, not all CPUs have vector >> support. It's dynamically detected, and then used accordingly. >> Given that the builtins are precompiled, we can't use >> `CpuFeatures::IsSupported` as that wouldn't take the actual hardware into >> account. >> We would either remove these functions from precompilation, or have a >> dynamic branch looking at the CPU feature in the generated assembly. >> >> Did other architectures run into similar issues? >> Any suggestions on how to handle this? >> >> Thanks. >> > -- > -- > v8-dev mailing list > v8-dev@googlegroups.com > http://groups.google.com/group/v8-dev > --- > You received this message because you are subscribed to the Google Groups > "v8-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to v8-dev+unsubscr...@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/v8-dev/ab08ef07-af9e-43f0-adeb-a59587e30e40n%40googlegroups.com > <https://groups.google.com/d/msgid/v8-dev/ab08ef07-af9e-43f0-adeb-a59587e30e40n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- -- v8-dev mailing list v8-dev@googlegroups.com http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-dev+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/v8-dev/CA%2B-a-b2mcr66zTwTvZqvK9cN_YJQpfODmvMJzXwd7szb6PSRJA%40mail.gmail.com.
