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Re:RISC-V: An Open Standard for SoCs by rwmj on Friday August 08, 2014 @04:48AM (#8151983)
ARMv8 is targeted at very high end phones but mainly at servers (of course it will creep down into cheap feature phones eventually). My server has 16 GB of RAM which is small for an ARMv8 server. So memory pressure may be not such a problem.

However it's also worth saying that Cortex-A53 can run Thumb-2 instructions. Not sure about Cortex-A57.

Re:RISC-V: An Open Standard for SoCs by wolfgke on Friday August 08, 2014 @09:52AM (#8152737)
According to http://en.wikipedia.org/wiki/ARM_Cortex-A57 the Cortex-A57 supports Thumb-2 instructions.