Talk:Exponentiation operator: Difference between revisions
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== Fractional Exponents == |
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This is for integer powers only right? No fractional exponents? --[[User:Mwn3d|Mwn3d]] 05:58, 19 February 2008 (MST) |
This is for integer powers only right? No fractional exponents? --[[User:Mwn3d|Mwn3d]] 05:58, 19 February 2008 (MST) |
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I believe that the REAL * REAL fraction can probably be done faster using some numerical equation. Eg simply |
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OP ** = ( REAL base, exponent )REAL: exp(log(base)*exponent); ~ # ... # |
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This above would work for fractional powers. For integral exponents the routine I provided is "sometimes" faster |
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then alternatives, esp where the exponent is s power of two. |
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BTW: I wrote these routine as a hint to [[User:Short Circuit]], and as a replacement to the <code>mpz_class pow2(mpz_class exp)</code> |
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routine he contributed in [[Lucas-Lehmer_test#C++]] (Which is probably painfully slow). |
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[[User:NevilleDNZ|NevilleDNZ]] 06:11, 19 February 2008 (MST) |
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Revision as of 13:11, 19 February 2008
Fractional Exponents
This is for integer powers only right? No fractional exponents? --Mwn3d 05:58, 19 February 2008 (MST)
I believe that the REAL * REAL fraction can probably be done faster using some numerical equation. Eg simply
OP ** = ( REAL base, exponent )REAL: exp(log(base)*exponent); ~ # ... #
This above would work for fractional powers. For integral exponents the routine I provided is "sometimes" faster then alternatives, esp where the exponent is s power of two.
BTW: I wrote these routine as a hint to User:Short Circuit, and as a replacement to the mpz_class pow2(mpz_class exp)
routine he contributed in Lucas-Lehmer_test#C++ (Which is probably painfully slow).
NevilleDNZ 06:11, 19 February 2008 (MST)