NEON support for android port
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https://en.wikipedia.org/wiki/ARM_architecture#NEON
Most android devices have NEON these days, so why not use it?
Should be as easy as adding -mfpu=neon to compilation flags.
Or was this tested already and gave no performance improvement?
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This will likely break compatibility with devices that have no NEON (devices with armv6 and earliest armv7 CPUs).
NEON does give slight performance improvement in CPU miner benchmark, but I can't really tell what effect it will have on TPT
Edited once by Sashkakuhta. Last: 3rd Jan 2017 -
A bit of necroposting, but I "benchmarked" NEON vs not-NEON build performance, NEON gives maybe 0.20 FPS improvement at best, which is pointless really: http://imgur.com/a/To9hP. ARMv8 with it's 64 bits can probably give some actual performance improvements.
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But is there actually more registers or anything like x86vs 64?
Or is it just 64 bit math and that nonsense.
the 64 bit instructions are probably slower like on the first intel/amd cpus :V
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Wikipedia says that ARMv8 does have more registers, both general purpose and floating point, and they are all 64 bit. On RPi 3, switching from ARMv7 to ARMv8 gave about 40% improvement in X11gost hashrate, but that's mostly math. I'll test ARMv8 TPT vs ARMv7 TPT when I have some time.
Edited once by Sashkakuhta. Last: 26th Jul 2017 -
So I tested it, ARMv8 gives ~ 1 fps improvement on the same CPU: http://imgur.com/a/GMkPy. Oh well.
Edited 2 times by Sashkakuhta. Last: 29th Jul 2017
