Re: support for bitwise comparison of floats

[Eric Blake]

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According to Bruno Haible on 3/24/2007 7:04 PM:
> Hi,
> 
> How can one distinguish +0.0 and -0.0. printf() needs to be able to do it.
> How can this be done portably? I can see two ways:
>   a) By knowing the bit position of the sign bit.
>   b) By doing a bit-for-bit comparison against +0.0.

You can also assume IEEE rules, and compare against signed infinity:
+0. / 1 => +infinity
- -0. / 1 => -infinity

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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