[PATCH] Optimize libc_lock_lock for MIPS XLP.

[Chris Metcalf]

On 8/14/2012 12:00 AM, Maxim Kuvyrkov wrote:
> +   atomic_compared_and_exchange_acq take the same time to execute.

Typo.

> +  if (__result >= 2)							\
> +    __result = (atomic_exchange_acq (__futex, 2) != 0);			\

Why not just return the old value in memory here (i.e. omit the "!= 0"), as
you do with the exchange_and_add above?  That seems more parallel in
structure, and also more efficient.

-- 
Chris Metcalf, Tilera Corp.
http://www.tilera.com