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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 |
| Message-ID | <5B329ADB.1164.ucljprogr@castlerockbbs.com> (permalink) |
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| To | Arne Vajhøj |
| In-Reply-To | <5B329ADB.1163.ucljprogr@castlerockbbs.com> |
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To: =?UTF-8?Q?Arne_Vajh=c3=b8j?=
From: "bursejan" <bursejan@1:261/38.remove-101j-this>
To: =?UTF-8?Q?Arne_Vajh=c3=b8j?=
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:
> >
> > ā ?- between(15,30,N), X is 10**N-10^N, write(N-X), nl, fail; true.
> > ā 15-0.0
>
> > ā 23-1.6777216E7
>
> > ā 29-0.0
> > ā 30-0.0
> >
> > On Adroid:
> >
> > ā ?- between(15,30,N), X is 10**N-10^N, write(N-X), nl, fail; true.
> > ā 15-0.0
>
> > ā 23-0.0
>
> > ā 29-1.7592186044416E13
> > ā 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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Re: Has Android different floats? "Arne Vajhøj" <arne vajhøj@1:261/38.remove-i5b-this> - 2018-06-24 15:21 -0500
Re: Has Android different floats? "bursejan" <bursejan@1:261/38.remove-i5b-this> - 2018-06-24 13:31 -0500
Re: Has Android different floats? "bursejan" <bursejan@1:261/38.remove-i5b-this> - 2018-06-24 13:35 -0500
Re: Has Android different floats? "bursejan" <bursejan@1:261/38.remove-i5b-this> - 2018-06-24 13:44 -0500
Re: Has Android different floats? "Eric Sosman" <eric.sosman@1:261/38.remove-i5b-this> - 2018-06-24 17:28 -0500
Re: Has Android different floats? "bursejan" <bursejan@1:261/38.remove-i5b-this> - 2018-06-24 16:08 -0500
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