[Gambas-user] "shared library" (with inline assembler code) is slow...

[Emil Lenngren]

Is the function itself slow or is it slow because of the call overhead of
libffi?

/Emil

2012/6/3 Ru Vuott <vuott at ...325...>

> Hello Benoit,
>
> simply for a test I've made this simple C "shared library" .so (with
> inline assembler code). I noted that if I use it from a Gambas program
> (with Extern) it's very slow. Why?
>
> static unsigned int car asm("raxregistro");
> static unsigned int cbr asm("rbxregistro");
> int hello(int numero) {
> cbr=numero;
> asm("mov rbxregistro(%rip),%eax");
> asm("ciclo:");
> asm("dec %eax");
> asm("jne ciclo");
> asm("mov %eax,raxregistro(%rip)");
> return car;
> }
>
> Bye
>
>
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