From: Jeffrey Carter <spam@spam.com>
Subject: Re: Compute a Sin(X) and Cos(X) pair, FSINCOS, inlining
Date: Thu, 10 Jul 2003 01:51:31 GMT
Date: 2003-07-10T01:51:31+00:00 [thread overview]
Message-ID: <3F0CC729.2020409@spam.com> (raw)
In-Reply-To: 3F0C7B5D.81F0FDCD@somewhere.nil
Gautier Write-only wrote:
>
> In some FPUs (like the Intel x387), Sin and Cos are computed
> simultaneously. There is an instruction (Intel x387: FSINCOS) to get
> both together for +/- the time cost of one of each.
And in some FPUs they're not. So you're not going to get language
support for such a platform-dependent thing. Probably the best thing you
can hope for is a compiler- and platform-dependent package with such a
function.
Most likely, you'll have to write your own using a machine-code insertion.
--
Jeff Carter
"If you think you got a nasty taunting this time,
you ain't heard nothing yet!"
Monty Python and the Holy Grail
next prev parent reply other threads:[~2003-07-10 1:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-09 20:30 Compute a Sin(X) and Cos(X) pair, FSINCOS, inlining Gautier Write-only
2003-07-09 20:40 ` Florian Weimer
2003-07-10 1:51 ` Jeffrey Carter [this message]
2003-07-12 6:26 ` Gautier Write-only
2003-07-13 23:32 ` Jerry van Dijk
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