(eng): Implementation of floatig point in FPGA (Field Programmable Gate Arrays) is not easy. Paper presents FPGA core which implements these operations by representation of floating point numbers as 32-bit integer (fixed point) logarithm. Basic arithmetical operations are performed in the logarithm numbering system (LNS) suitable for FPGA. First, we describe Matlab library emulating bit-exactly the properties of the final hardware.