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ID: 14180, Fast Exp(), Ln(), Pow() etc. Routines

by Robert Lee Email:

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For Delphi, Version 2.0  to 5.0 374 downloads
Copyright: No significant restrictions

Size: 2,155 bytes
Updated on Mon, 27 Dec 1999 00:00:00 GMT
Originally uploaded on Mon, 27 Dec 1999 00:00:00 GMT
SHA1 Hash: 0F3523D06F7A20BD8172D51C4F4ADAC0E084FD93
MD5 Hash: ECA28A87A0A0EF226CD643F9DE41031A

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The two units (FastMath and SuperFastMath) implement fast but reduced accuracy replacements for exponentiation and logrithms. These routines are mostly likely to be useful in situations where the "shape" of the function is not critical only its general behavior such as in neural networks and many types of simulators. The FastMath routines are approximately 4 times faster than their standard counterparts and have an accuracy of about 3 digits. The SuperFastMath routines are about 7 times faster and have an accuracy of about 2 digits with the exception of Ln(x) which really stinks as x->1. Additionally, the properties of the routines in FastMath are somewhat better around "special" values such as exp(0) and ln(1).

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