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From "Daniel Fridlender (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-2091) [classlib][java.math] optimization of BigInteger.modInverse
Date Wed, 08 Nov 2006 00:42:52 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-2091?page=all ]

Daniel Fridlender updated HARMONY-2091:

    Attachment: before.html

These html documents show the gain in performance obtained by applying the patch.  The files
show performance before and after the patch.

>  [classlib][java.math] optimization of BigInteger.modInverse
> ------------------------------------------------------------
>                 Key: HARMONY-2091
>                 URL: http://issues.apache.org/jira/browse/HARMONY-2091
>             Project: Harmony
>          Issue Type: Improvement
>            Reporter: Daniel Fridlender
>            Priority: Minor
>         Attachments: after.html, before.html, modInverse_gcd.diff
> This is an optimization of modInverse consisting of implementing algorithms from the
papers "The Montgomery Modular Inverse - Revisited" (by Savas, E; Koc, C) and "New Algorithm
for Classical Modular Inverse" (by Lórencz, R) and also making some low-level optimizations
like avoiding intermediate data construction by implementing specific ad-hoc combination of
arithmetic operations.

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