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NEON is not supported by all Cortex-A9 cores. It has been mandatory for Cortex-A8, but is not for Cortex-A9. At least Marvell Dove and nVidia Tegra 2 are left out, if we enable NEON on armv7hl.

armv5tel does not support NEON at all. armv7hl on IPFire uses VFPv3-d16 which is more common and equally fast for our purposes.


  • We have found, that some libraries still enable NEON (apparently). We do not know if that will cause any issues in real life.
  • NEON instructions create a lot of heat, causing some SoCs to crash after a while.
devel/arm/start.txt · Last modified: 2013/07/18 09:26 by MichaelTremer