[Boost-bugs] [Boost C++ Libraries] #12022: CRT optimised powm()

Subject: [Boost-bugs] [Boost C++ Libraries] #12022: CRT optimised powm()
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-02-26 10:29:02

#12022: CRT optimised powm()
 Reporter: psiha | Owner: johnmaddock
     Type: Feature Requests | Status: new
Milestone: To Be Determined | Component: multiprecision
  Version: Boost 1.61.0 | Severity: Optimization
 Keywords: |
 multiprecision::powm() with unchecked uints is _much_ slower (i.e. I
 actually perceive the time it takes for the function to return on an 4GHz
 i5 in release builds) than say the equivalent libtomcrypt/math operation.
 I'm guessing the major reason for this is the
 optimisation (or lack thereof in multiprecision).
 So, can you implement a CRT 'enabled' powm overload (I presume this would
 also require a function for factoring a large multiprecision uint into to
 dp, dq, etc. factors)?

Ticket URL: <https://svn.boost.org/trac/boost/ticket/12022>
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