The same is true for ATI too as described in the ATI HD2000 Programming Guide. Non-vectorized code is optimized and it is recommended for cases where vectorial instructions are not needed.

http://ati.amd.com/developer/SDK/AMD_SDK_Samples_May2007/Documentations/ATI_Radeon_HD_2000_programming_guide.pdf

Good to know that nvidia and intel are using the same architecture.

On Feb 8, 2008 7:34 PM, Marco Salvi <marcotti@gmail.com> wrote:


On Feb 8, 2008 9:42 AM, Jon Watte <hplus@mindcontrol.org> wrote:

I'm told that the implementation of modern 4-way SIMD on graphics cards
is now done as serial instructions, so there's little benefit to be had
compared to just coding it out.

This is true for NVIDIA (G8x architecture) and latest Intel GPUs, not for AMD/ATI GPUs.
But yes..I guess everyone will sooner or later move to the same model.

Marco


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