Patent US 5,268,854

A microprocessor includes an integer processing unit with the decimal point fixed; first and second floating point processing units which can execute simultaneously with the integer processing unit; a register file; a first fixed point processing unit for receiving data at the point n from the register file, for searching for data at the point n+1 by partitioned addition of the increment forwarding by one point, and for outputting the searched data; a second fixed point processing unit for receiving data at the point n from the register file, for searching for data at the point n+2 by partitioned addition of the increment forwarding by two points, and for outputting the searched data; and a merger for receiving the addition results and for gathering data of the bit length of each upper half.