* Mathieu Desnoyers ([EMAIL PROTECTED]) wrote:
> --- a/include/asm-powerpc/local.h
> +++ b/include/asm-powerpc/local.h
> +/**
> + * local_add_unless - add unless the number is a given value
> + * @l: pointer of type local_t
> + * @a: the amount to add to l...
> + * @u: ...unless l is equal to u.
> + *
> + * Atomically adds @a to @l, so long as it was not @u.
> + * Returns non-zero if @l was not @u, and zero otherwise.
> + */
> +static __inline__ int local_add_unless(local_t *l, long a, long u)
> +{
> + long t;
> +
> + __asm__ __volatile__ (
> +"1: ldarx %0,0,%1 # local_add_unless\n\
> + cmpd 0,%0,%3 \n\
> + beq- 2f \n\
> + add %0,%2,%0 \n"
> + PPC405_ERR77(0,%2)
Sorry, the previous line is unnecessary : PPC405 is a 32 bits arch errata and
this code is compiled on 64 bits arch only.
> +" stdcx. %0,0,%1 \n\
> + bne- 1b \n"
> +" subf %0,%2,%0 \n\
> +2:"
> + : "=&r" (t)
> + : "r" (&(l->a.counter)), "r" (a), "r" (u)
> + : "cc", "memory");
> +
> + return t != u;
> +}
> +
Mathieu
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