Re: sample data types (iOS)
Re: sample data types (iOS)
- Subject: Re: sample data types (iOS)
- From: Hari Karam Singh <email@hidden>
- Date: Sun, 12 Feb 2012 15:10:34 +0000
- Expiry-date: Wed, 11 Apr 2012 23:00:00 +0000
- Organization: AncientBohemia Ltd.
After reading through this incredible insightful thread from last year, I’m still left with a couple questions about 8.24 versus float... Has anyone confirmed that 8.24 is really faster on more recent iOS devices than float? The question came to mind after investigating the Accelerate framework and noting that it has functions for integers and single and double precision float, but no mention of 8.24 fixed point. Also don’t most modern processors have floating point co-processors built in? ARM Cortex-A8 has a floating point vector add-on: VFPv3 (http://en.wikipedia.org/wiki/ARM_architecture#VFP, http://en.wikipedia.org/wiki/ARM_Cortex-A8, http://www.arm.com/products/processors/technologies/vector-floating-point.php). Perhaps it’s not worth the headache of avoiding floats and handling 8.24 maths. Has anyone had any real world gains on more recent devices? Hari Karam Singh |
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