On Tue, Sep 10, 2013 at 8:29 AM, Arjan van de Ven <ar...@linux.intel.com> wrote: >> > also.. yuck on using "dec" > "dec" sucks, please use "sub foo ,1" instead
That's a bigger instruction, largely due to the constant. > (dec sucks because of its broken flags behavior; it creates basically a > bubble in the pipeline) Intel could (and should) just fix that. It's "easy" enough - you just need to rename the carry flag as a separate register (and make sure that the conditional instructions that don't use it don't think they need it). In fact I thought Intel already did that on their large cores. Are you sure they still have trouble with inc/dec? Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/