SIMD intrinsics - are they usable on gpus?

Question

I'm wondering if I can use SIMD intrinsics in a GPU code like a CUDA's kernel or openCL one. Is that possible?

Answer 1

No, SIMD intrinsics are just tiny wrappers for ASM code. They are CPU specific. More about them here.

Generally speking, why whould you do that? CUDA and OpenCL already contain many "functions" which are actually "GPU intrinsics" (all of these, for example, are single-point-math intrinsics for the GPU)

Answer 2

You use the vector data types built into the OpenCL C language. For example float4 or float8. If you run with the Intel or AMD device drivers these should get converted to SSE/AVX instructions of the vendor's OpenCL device driver. OpenCL includes several functions such as dot(v1, v2) which should use the SSE/AVX dot production instructions. Is there a particular intrinsic you are interested in that you don't think you can get from the OpenCL C language?