Cycle accurate simulation of OpenCL kernel

You can probably convert your kernel to a C/C++ module and compile it using Intel's HLS compiler and then use modelsim to simulate it as per Intel's HLS documentations. However, you should note that due to the extremely low external memory bandwidth of FPGAs and the simplicity of the memory controller, your performance bottleneck will pretty much always be the external memory accesses which you cannot simulate accurately (if at all).