Re: [Qemu-devel] [6050] fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()

[Andreas Färber]

Hi,

Am 15.12.2008 um 18:14 schrieb Aurelien Jarno:

> Revision: 6050
>          http://svn.sv.gnu.org/viewvc/? 
> view=rev&root=qemu&revision=6050
> Author:   aurel32
> Date:     2008-12-15 17:14:20 +0000 (Mon, 15 Dec 2008)
>
> Log Message:
> -----------
> fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()
>
> Signed-off-by: Aurelien Jarno <address@hidden>

Doesn't IEEE 754 have both a positive and a negative zero?

> +INLINE float32 float32_is_neg(float32 a)
> +{
> +    return a < 0.0;
> +}

I would assume that 0.0 == -0.0 so this would not indicate a negative  
zero as negative. Is that intended?

Andreas