signed zeros

[Steve Kargl]

On Thu, Jul 29, 2010 at 08:37:40PM -0400, Jack Howarth wrote:
> On Thu, Jul 29, 2010 at 05:22:06PM -0700, Steve Kargl wrote:
> > 
> > Just use the -fno-sign-zero option.
> 
> This option seems like taking a sledgehammer to a simple
> i/o issue...
> 
>        -fno-signed-zeros
>            Allow optimizations for floating point arithmetic that ignore the signedness of zero.  IEEE arithmetic specifies the behavior of distinct +0.0 and -0.0 values, which then
>            prohibits simplification of expressions such as x+0.0 or 0.0*x (even with -ffinite-math-only).  This option implies that the sign of a zero result isn't significant.
> 
>            The default is -fsigned-zeros.
> 

Check your spelling.  -fno-sign-zero /= -fno-signed-zeros.

-- 
Steve