Apple's ABI for iOS is a custom derivative of APCS, not AAPCS. They do not even try to conform to the AAPCS ABI, nor should they need to. iOS has a soft-float ABI, but uses the float glue names from libgcc, not the EABI names.
This whole thing reads like the LuaJIT guy whining that he has to do some work to port to iOS. The compiler-rt library provides these functions and it shouldn't take him more than 10 minutes to figure out the proper names to use on iOS.