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Xcode/gcc iPhone Autovectorization?
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Xcode/gcc iPhone Autovectorization?

  • Subject: Xcode/gcc iPhone Autovectorization?
  • From: lbland <email@hidden>
  • Date: Tue, 29 Jun 2010 16:40:42 -0400
hi-

Xcode 3.2.3 says:

GCC-4.2 Features Not Available in LLVM-GCC-4.2:

Auto vectorization

ouch!

If I turn on Auto vectorization then does gcc (non-LLVM) autovectorize loops for armv6 (no thumb) and armv7 ... using the VFP perhaps (does iPhone 3GS have a VFP, I assume the iPhone 4 does)? or am I asking for too much (ie: I have to hand code VFP - noh!)?

thanks!-

-lance

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