[email protected] writes:
[snip]
> +#if (defined(PIPE_CC_GCC) && defined(__i386__))
^^^^^^^^^^^^^^^^^
This is basically an #ifdef (__GNUC__), I'm guessing?
> +struct pipe_atomic {
> + int32_t count;
> +};
[snip]
> +static INLINE int32_t
> +p_atomic_cmpxchg(struct pipe_atomic *v, int32_t old, int32_t new)
> +{
> + int32_t previous;
> +
> + __asm__ __volatile__("lock; cmpxchgl %k1,%2":"=a"(previous)
> + :"r"(new), "m"(v->count), "0"(old)
> + :"memory");
> +
> + return previous;
> +}
If the code is only compiled on gcc anyway, it seems like one could
apply the atomics primitives provided by the compiler:
http://gcc.gnu.org/onlinedocs/gcc-4.3.3/gcc/Atomic-Builtins.html
That might allow you to remove the __i386__ qualification as well.
(Note that I've never tried these extensions, just an idea.)
-tom
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