From: "Markus Schöpflin" <no.spam@spam.spam>
Subject: Re: Ada.Numerics, Accuracy of trigonometric functions
Date: Fri, 7 Oct 2016 12:40:04 +0200
Date: 2016-10-07T12:40:04+02:00 [thread overview]
Message-ID: <8b7af11f-b738-9945-84e0-8be68f516d5a@spam.spam> (raw)
In-Reply-To: nt7t3q$697$1@dont-email.me
Am 07.10.2016 um 12:23 schrieb Brian Drummond:
[...]
> C tends to silently coerce "float" to "double" any time you pass a float
> argument to a function unless you jump through hoops to make such
> coercion impossible.
>
> So my suspicion is simply that the C program is giving you double
> precision.
I can see in the generated assembler dump that the libc cosf function is
called. So I don't think this is the case.
And I get the same result in Ada using Long_Float or Long_Long_Float; see my
follow-up.
Markus
next prev parent reply other threads:[~2016-10-07 10:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-07 10:13 Ada.Numerics, Accuracy of trigonometric functions Markus Schöpflin
2016-10-07 10:23 ` Markus Schöpflin
2016-10-07 10:23 ` Brian Drummond
2016-10-07 10:40 ` Markus Schöpflin [this message]
2016-10-07 14:52 ` Dennis Lee Bieber
2016-10-07 15:19 ` Markus Schöpflin
2016-10-07 22:15 ` Dennis Lee Bieber
2016-10-07 16:38 ` Jeffrey R. Carter
2016-10-10 7:44 ` Markus Schöpflin
2016-10-22 22:38 ` Robert Eachus
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