I haven't dived deep in it, but we tried an OpenCL program in a FPGA and we couldn't even make it work: OpenCL support is at version 1.0 (no vectors, no barrier

I haven't dived deep in it, but we tried an OpenCL program in a FPGA and we couldn't even make it work: OpenCL support is at version 1.0 (no vectors, no barriers) without double precision numbers. And, from what I've heard, the performance is not that good.