Abstract: The CalmRISC32 FPU (Floating-Point Unit) is a RISC coprocessor for embedded system applications. It supports IEEE-754 standard single precision floating-point addition, floating-point subtraction, floating-point multiplication, floating-point division, format conversion, comparison, rounding, load, store, etc. It also supports four rounding modes, and precise exception. It can execute and complete instructions out of order, if such constraints as data dependency, resource conflict, and exception prediction are resolved. Standard cell-base design techniques were used to reduce design time and expense. The first prototype operated at approximately 70MHz with the worst-case delay in gate level simulation.