A 64-bit floating point processing unit for a RISC microprocessor

Describes architecture, layout, and simulation methodology of a high performance 64-bit floating point processing unit (FPU) which is applicable to a RISC microprocessor. The FPU contains a floating point execution unit and a floating point controller for the SPARC S-25 microprocessor. The FPU supports SPARC floating point instructions based on the IEEE Standard for Binary Floating Point Arithmetic (ANSI/IEEE std. 754-1985). Operating frequency is 25 MHz and peak floating point computing performance is 12.5 MFLOPS when it is used with the S-25 SPARC microprocessor. The chip was designed using 0.8 mu m CMOS standard cell technology. The chip size is 16.4*16.4 mm and packaged into 179-pin PGA. Total transistor count was approximately 330000.<
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