floating point - Is there a way to detect VFP/NEON/Thumb/... on iOS at runtime? -


so it's easy figure out kind of cpu ios device runs querying sysctlbyname("hw.cpusubtype", ...), there seems no obvious way figure out features cpu has (think vfp, neon, thumb, ...). can think of way this?

basically, need similar getauxval(at_hwcap) on linux/android, returns bit mask of features supported cpu.

a few things note:

  1. the information must retrieved @ runtime os. no preprocessor defines.
  2. fat binaries not solution. do need know stuff in arm v6 binary.

thanks in advance!

sysctlbyname has “hw.optional.neon”. not see name vfp, except “hw.optional.vfp_shortvector”, deprecated feature.


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