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Architecture and software support in IBM S/390 Parallel Enterprise Servers for IEEE Floating-Point arithmetic |
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by P. H. Abbott, D. G. Brush, C. W. Clark,III, C. J. Crone, J. R. Ehrman, G. W. Ewart, C. A. Goodrich, M. Hack, J. S. Kapernick, B. J. Minchau, W. C. Shepard, R. M. Smith,Sr., R. Tallman, S. Walkowiak, A. Watanabe, W. R. White
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IEEE Binary Floating-Point is an industry-standard architecture. The IBM System/360™ hexadecimal floating-point architecture predates the IEEE standard and has been carried forward through the System/370™ to current System/390® processors. The growing importance of industry standards and floating-point combined to produce a need for IEEE Floating-Point on System/390. At the same time, customer investment in IBM floating-point had to be preserved. This paper describes the architecture, hardware, and software efforts that combined to produce a conforming implementation of IEEE Floating-Point on System/390 while retaining compatibility with the original IBM architecture. |
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| Related Subjects: Arithmetic and logical unit design; IBM System/390 Parallel Enterprise Server; Logic design and technology; Mathematical functions and techniques |
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