Support for the AArch64 architecture is available since release 11.

AArch64 architecture

Sort of 64bit evolution of the ARM Architecture (ARMv8).

Documentation

Apple has an 2 ipad and an 1 iphone as targettable hardware.

Applied Micro announced general availability of the X-Gene but can't currently deliver (Nov 2013) development kits.

Something is expected to be available from Samsung next year.

Arm provides an ARMv8 enabled Fast Model. It is available after registration on Arm's website.

Qemu 2.0 supports AArch64 as linux-user target.

clang (clang-3.3 is lacking assembler support for several NEON instructions, creates working binaries from C code)
clang-apple works with gas-preprocessor.pl
gcc (gcc-4.8 works)

Architecture is similar but differs to much so that no code sharing with ARMv7 is possible.

User time of single threaded decoding time of 2013-11-26_h264_opt_720p_day.of.the.doctor_133s.mov

AArch64QemuSetup details how to set up on Gentoo

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