SSE in libthr

[Daniel Eischen]

On Fri, 27 Mar 2015, Eric van Gyzen wrote:

> In a nutshell:
>
> Clang emits SSE instructions on amd64 in the common path of
> pthread_mutex_unlock.  This reduces performance by a non-trivial amount.  I'd
> like to disable SSE in libthr.

This makes sense to me.

-- 
DE