โ Scribed by Walther, J. S.
No coin nor oath required. For personal study only.
This paper describes a single unified algorithm for the calculation of elementary functions including multiplication, division, sin, cos, tan, arctan, sinh, cosh, tanh, arctanh, In, exp and square-root. The basis for the algorithm is coordinate rotation in a linear, circular, or hyperbolic coordinate system depending on which function is to be calculated. The only operations required are shifting, adding, subtracting and the recall of prestored constants. The limited domain of convergence of the algorithm is calculated, leading to a discussion of the modifications required to extend the domain for floating point calculations.
A hardware floating point processor using the algorithm was built at Hewlett-Packard Laboratories. The block diagram of the processor, the microprogram control used for the algorithm, and measures of actual performance are shown.
๐ SIMILAR VOLUMES