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Date: Tue, 23 Mar 2010 12:22:37 +0300
Message-ID: <90823c941003230222i26ab423fm9f1325b28f5d4d45@mail.gmail.com>
Subject: Re: [Caml-list] testers wanted for experimental SSE2 back-end
From: Dmitry Bely <dmitry.bely@gmail.com>
To: caml-list@inria.fr
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X-Spam: no; 0.00; bunzli:01 buenzli:01 23,:98 wrote:01 experimental:01 dmitry:01 dmitry:01 caml-list:01 bely:01 bely:01 back-end:02 let:03 let:03 truncate:04 truncate:04 

On Tue, Mar 23, 2010 at 12:07 PM, Daniel B=FCnzli
<daniel.buenzli@erratique.ch> wrote:
>> let round x =3D truncate (x +. 0.5)
>
> Side note, if you are also interested in negative numbers

Sure, it was just an code generation example. Probably I should use
round_positive name.

> that's not what you want. You want :
>
>> let round x =3D floor (x +. 0.5)

...and you get a floor() C call. I would better use

let round x =3D truncate (x +. (if x > 0. then 0.5 else -0.5))

- Dmitry Bely