Over at Real World Tech David Kanter takes a look at AMD's Jaguar microarchitecture.
Jaguar is AMD’s first 28nm processor. It is a compact 3.1mm2 core that targets 2-25W devices, in particular tablets, microservers, and consoles. It is a clear derivative of the earlier 40nm Bobcat design, with significant improvements in instruction set architecture and implementation. Some of the highlights include support for AVX, wider 128-bit datapaths, and a higher performance L2 cache. The basic pipeline for Jaguar is shown below, in Figure 1, and clocks in at one cycle longer than Bobcat.