Intel Corp (INTC)

[mas]

Quark competes directly performance-wise* with ARM A5 which ARM is also touting for wearables power efficiency. Quark is *not* going to be a competitor to Cortex-M which is perhaps the only low power range where x86 currently can't compete.

http://www.arm.com/products/processors/cortex-a/cortex-a5.php
http://www.arm.com/products/processors/cortex-a/cortex-a5.php?tab=Performance
http://www.arm.com/products/processors/cortex-a/cortex-a5.php?tab=Specifications

*similar DMIPS/MHz and clockspeed.