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Re: Has Android different floats?

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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 Vajhøj:
> 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:
> > 
> >    ?- between(15,30,N), X is 10**N-10^N, write(N-X), nl, fail; true.
> >    15-0.0
> 
> >    23-1.6777216E7
> 
> >    29-0.0
> >    30-0.0
> > 
> > On Adroid:
> > 
> >    ?- between(15,30,N), X is 10**N-10^N, write(N-X), nl, fail; true.
> >    15-0.0
> 
> >    23-0.0
> 
> >    29-1.7592186044416E13
> >    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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Thread

Has Android different floats? j4n bur53 <janburse@fastmail.fm> - 2018-06-24 20:41 +0200
  Re: Has Android different floats? Arne Vajhøj <arne@vajhoej.dk> - 2018-06-24 15:21 -0400
    Re: Has Android different floats? bursejan@gmail.com - 2018-06-24 13:31 -0700
      Re: Has Android different floats? bursejan@gmail.com - 2018-06-24 13:35 -0700
        Re: Has Android different floats? bursejan@gmail.com - 2018-06-24 13:44 -0700
        Re: Has Android different floats? Eric Sosman <esosman@comcast-dot-net.invalid> - 2018-06-24 17:28 -0400
          Re: Has Android different floats? bursejan@gmail.com - 2018-06-24 16:08 -0700
            Re: Has Android different floats? bursejan@gmail.com - 2018-06-26 10:29 -0700

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