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registerme
Journeyman III

OpenCL Vector Element Shift

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Is there a way to shif the elements in a vector. Say I have int4, want to shift 4 element to the right for one position, with the left most one 0. So if int4={1,2,3,4}, the result is {0,1,2,3}.

The reason I am doing this is, I want to do a vector add (or other operation), but the elements need to be shifted.

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MicahVillmow
Staff
Staff

Re: OpenCL Vector Element Shift

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Use the shuffle functions that are part of the OpenCL specification.

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mikewolf_gkd
Journeyman III

Re: OpenCL Vector Element Shift

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I guess xx>>1;

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nou
Exemplar

Re: OpenCL Vector Element Shift

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vec = (int4)(0, vec.xyz)

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registerme
Journeyman III

Re: OpenCL Vector Element Shift

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The shift will be dynamic, that is, I don't know how far it will be shifted, could be 1, 2, 3 elements away. Using xyzw does not quite help.

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MicahVillmow
Staff
Staff

Re: OpenCL Vector Element Shift

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Use the shuffle functions that are part of the OpenCL specification.

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