Re: [Lightning] jit_qdivr_u trashes JIT_R0 on x86_64

[Paul Cercueil]

Hi,

I noticed that it trashes my JIT_R2 (%r12) register as well...

Regards
-Paul



Le dim. 18 août 2019 à 19:46, Paul Cercueil <address@hidden> a 
écrit :
> Hi Pablo,
>
> I'm trying to debug an issue I have on my Lightrec project 
> (https://github.com/pcercuei/lightrec/).
>
> On x86_64, I'm under the impression that calling jit_qdivr_u() 
> trashes the JIT_R0 (%eax) register. Looking at the code, it 
> definitely uses %eax for *something*. Should I expect %eax to be 
> properly restored after jit_qdivr_u(), or should I avoid using this 
> register in the first place?
>
> Thanks,
> -Paul