Jeffi Edward.J wrote:
>
> Hi,
>
> I have a doubt in embedded assembly code supported by GCC.
>
> Assume I have an inline function with some assembler statements embedded
> using asm().
>
> inline void fun()
> {
> asm("mfmsr %r3\n\t"
> "loop:\n\t"
> ...
> ...
> "bne loop\n\t"
> ...);
> }
>
>
> If I call the inline function from two functions within same compilation
> unit,
> the label "loop" is present in both the functions. Since the label
has scope
> throughtout
> the compilation unit, the assembler gives redefinition error for "loop".
>
> Is there any option to supply to compiler so that GCC generates
unique label
> for "loop"
> across funcion? Or is it a limitation in GCC? or is it unusual to
write asm
> statements
> inside inline function?
>
> Please clarify this.
>
> Thanks and regards,
> Jeffi
>
use 0, 1, ... (local labels)
like in:
asm("mfmsr %r3\n\t"
"0:\n\t"
...
...
"bne 0b\n\t"
...);
See: http://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html
Cédric.
