Decimal Floating-Point Adder and Multifunction Unit with Injection-Based Rounding

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Provided by: University of Wisconsin-Madison
Topic: Hardware
Format: PDF
Shrinking feature sizes gives more headroom for designers to extend the functionality of microprocessors. The IEEE 754R working group has revised the IEEE 754-1985 Standard for binary floating-point arithmetic to include specifications for decimal floating-point arithmetic and IBM recently announced incorporating a decimal floating point unit into their POWER6 processor. As processor support for decimal floating-point arithmetic emerges, it is important to investigate efficient algorithms and hardware designs for common decimal floating-point arithmetic algorithms. This paper presents novel designs for a decimal floating-point adder and a decimal floating-point multifunction unit.
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