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Beating Floating Point at its own game: Posit Arithmetic

“Dr. Gustafson has recently finished writing a book, The End of Error: Unum Computing, that presents a new approach to computer arithmetic: the unum. The universal number, or unum format, encompasses all IEEE floating-point formats as well as fixed-point and exact integer arithmetic. This approach obtains more accurate answers than floating-point arithmetic yet uses fewer bits in many cases, saving memory, bandwidth, energy, and power.”

Radio Free HPC Looks at the Posit and Next Generation Computer Arithmetic

In this podcast, the Radio Free HPC team discusses a recent presentation by John Gustafson on Next Generation Computer Arithmetic. “A new data type called a “posit” is designed for direct drop-in replacement for IEEE Standard 754 floats. Unlike unum arithmetic, posits do not require interval-type mathematics or variable size operands, and they round if an answer is inexact, much the way floats do. However, they provide compelling advantages over floats, including simpler hardware implementation that scales from as few as two-bit operands to thousands of bits.”

John Gustafson presents: Beyond Floating Point – Next Generation Computer Arithmetic

“A new data type called a “posit” is designed for direct drop-in replacement for IEEE Standard 754 floats. Unlike unum arithmetic, posits do not require interval-type mathematics or variable size operands, and they round if an answer is inexact, much the way floats do. However, they provide compelling advantages over floats, including simpler hardware implementation that scales from as few as two-bit operands to thousands of bits. For any bit width, they have a larger dynamic range, higher accuracy, better closure under arithmetic operations, and simpler exception-handling.”

Interview: John Gustafson on Technology Disruption and the StartupHPC Workshop

John Gustafson from A*Star will keynote the third annual StartupHPC Workshop on Nov 14 in Salt Lake City with a talk on Technology Disruption. Known to many in the HPC community as the father of Gustafson’s Law, John Gustafson was kind enough to sit down with us to share his perspectives on the current state of high performance computing. “The best way to spot a Startup opportunity is to notice an established vendor that has gotten too comfortable with its large market share, and thinks it can raise profit margins and resist the downward price pressure of Moore’s law.”

Podcast: John Gustafson on What’s Next for Parallel Computing

In this podcast from Radio New Zealand, John Gustafson from the A*STAR Agency for Science, Technology and Research discusses parallelism and high performance computing. Gustafson is the father of Gustafson’s Law, which gives the theoretical speedup in latency of the execution of a task at fixed execution time that can be expected of a system whose resources are improved.