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From: "bursejan" <bursejan@1:261/38.remove-i5b-this>
Newsgroups: comp.lang.java.programmer
Subject: Re: Has Android different floats?
Date: Sun, 24 Jun 2018 13:31:30 -0500
Organization: Agency News - Dunedin, New Zealand
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From: "bursejan" <bursejan@1:261/38.remove-101j-this>

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From: bursejan@gmail.com

You cannot use the strictfp keyword in front of Math.pow(). Thats only for the
basic operations.

Math.pow() itself is implemented in JDK 1.8 as follows:

    public static double pow(double a, double b) {
        return StrictMath.pow(a, b); // default impl. delegates to StrictMath
    }

Am Sonntag, 24. Juni 2018 21:21:57 UTC+2 schrieb Arne VajhÄ,j:
> On 6/24/2018 2:41 PM, j4n bur53 wrote:
> > Running a simple test.
> > ** is Math.pow(),
> > ^ is BigInteger.pow() and then BigInteger.doubleValue().
> >
> > On Java:
> >
> >  â  ?- between(15,30,N), X is 10**N-10^N, write(N-X), nl, fail; true.
> >  â  15-0.0
>
> >  â  23-1.6777216E7
>
> >  â  29-0.0
> >  â  30-0.0
> >
> > On Adroid:
> >
> >  â  ?- between(15,30,N), X is 10**N-10^N, write(N-X), nl, fail; true.
> >  â  15-0.0
>
> >  â  23-0.0
>
> >  â  29-1.7592186044416E13
> >  â  30-0.0
> >
> > Has Android different floats?
> > Tested jdk1.8.0_152 against Android 8.0.0
>
> ARM supposedly use standard IEEE 754 FP.
>
> But I wonder if usage of strictfp would change your results.
>
> Arne

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