WP-32S in 2016?
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01-15-2016, 09:05 PM
(This post was last modified: 01-18-2016 06:28 PM by matthiaspaul.)
Post: #80
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RE: WP-32S in 2016?
(01-12-2016 12:08 AM)matthiaspaul Wrote: some while back I learnt that the IEEE-754:2008 and ISO/IEC/IEEE 60559:2011 standards now recommend implementations also for base 10 and 2 (the following 4 function names are my own creations in lack of anything "official"):FWIW, Intel x86 floating-point processors since the 80387 support machine instructions named FYL2XP1 and F2XM1 for:
http://mathworld.wolfram.com/Floating-Po...metic.html uses a similar notation log10(x) = lg(x), exp10(x) = 10^x log10p1 = lg(1+x), exp10m1 = 10^x-1 log2(x) = ld(x), exp2(x) = 2^x log2p1(x) = ld(1+x), exp2m1(x) = 2^x-1 William Kahan, however, uses the following odd notation in "Pseudo-Division Algorithms for Floating-Point Logarithms and Exponentials" (2002-05-20), http://www.cims.nyu.edu/~dbindel/class/cs279/logexp.pdf lg(x) = ld(x), txp(x) = 2^x lg1p(x) = ld(1+x), txpm1(x) =2^x-1 Greetings, Matthias -- "Programs are poems for computers." |
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