How do I Perform Integer SIMD operations on the iPad A4 Processor?

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+3 Q:

How do I Perform Integer SIMD operations on the iPad A4 Processor?

Hello,

I feel the need for speed. Double for loops are killing my iPad apps performance. I need SIMD. How do I perform integer SIMD operations on the iPad A4 processor?

Thanks,
Doug

+4 A:

The instruction set is NEON, intrinsics reference

I've never been able to find good documentation on what they all actually are. But you pick it up pretty quickly if you've had any exposure to SSE

Joshua Weinberg 2010-10-02 19:37:59

Ummm, And SSE is...?

dugla 2010-10-03 11:47:05

SSE is SIMD for x86, what code are you trying to vectorize?

Joshua Weinberg 2010-10-03 15:07:25

This is an image processing app. I need to convert a window-level operation typically done using a LUT into a SIMD operation. I need to touch every pixel on the screen as fast as possible. Using the GPU + GLSL complicates things.

dugla 2010-10-04 01:05:32

It may complicate things, but its more likely closer to what you're really trying to accomplish.

Joshua Weinberg 2010-10-04 04:28:36