loop in asm
Segher Boessenkool
segher@kernel.crashing.org
Sun Nov 12 21:02:00 GMT 2006
> When I compiled it by "gcc -Wall 1.c", I did not get
> any compilation errors.
>
> But surprisingly I got compilation error when I
> compiled it by "gcc -O3 -Wall 1.c", I got comilation
> error saying that label .JIT already defined .
It inlined the function, but also kept a separate
copy because the function it is defined in isn't
static.
> How to solve it?
You can use local labels, for example
void fun()
{
asm volatile (" movl $0xFFFFFFFF, %%ecx;"
"0: loop 0b\n;"
:
:
:"%ecx");
}
Segher
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