Re: [boost] sorting floats by casting to integer

Subject: Re: [boost] sorting floats by casting to integer
From: Steven Ross (spreadsort_at_[hidden])
Date: 2009-07-27 01:48:04

On Sun, Jul 26, 2009 at 5:22 PM, Cory Nelson <phrosty_at_[hidden]> wrote:

> > Thanks for the suggestion.
> > I ended up passing those flags you suggested, and obtained this result:
> > cl : Command line warning D9002 : ignoring unknown option '-march=nocona'
> > cl : Command line warning D9002 : ignoring unknown option '-mfpmath=sse'
>
> Those are for GCC.  For VC++, you want to use /arch:SSE2.
>

Thanks Cory.  There was no warning with that option specified, but  there
was also no measurable performance change.  I verified that MSVC was being
called with the option, and that if I misspelled the option, a warning was
issued.  I think that SSE is deliberately disabled in the cheap version of
MSVC I bought, based upon the Microsoft documentation.