Assembler statements inside inline funntion

[Jeffi Edward.J]

Cedric Roux-4 wrote:
> 
> 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.
> 
> 

I checked and it solves the problem. Thanks a lot :)

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