The Cortex-R8 has the same architecture to the R7 - it features an 11-stage OoO (Out-of-Order) execution pipeline and clocks of up to 1.5GHz on a 28nm HPM process. However, the new core can now be deployed as a quad-core, versus the limited dual-core configuration of the R7, doubling the theoretical processing power over its predecesssor. The cores can also be run asymetrically and also each have their own power-plane, meaning they can be turned off for power savings and increased battery life.
ARM says that a quad-core configuration on a 28nm or 16nm FinFET process being able to reach up to 15000 Dhrystone MIPS at 1.5GHz frequency.
The Cortex-R8 also enables larger tightly coupled memories (TCMs), up to 1MB of instruction TCM and 1MB of data TCM per core. In additional to other benefits the Cortex-R8 can be configured with 12, 16, 20 or 24 memory protection unit regions.
ARM silicon partners have already begun design work. SoCs based on the Cortex-R8 targeting the mass storage market segment are likely to be available in 2016. Modem designs using Cortex-R8 processors will support the rollout of the new LTE-Advanced Pro and 5G standards. The Cortex-R8 is also compatible with existing software so design cycles will be reduced, allowing developers to extend their real-time product ranges based on a single CPU architecture.
Huawei is among the first companies that have licenced the Cortex-R8.