What is acceptable for -ffast-math? (Was: associative law incombine)

[Linus Torvalds]

On 1 Aug 2001, Gabriel Dos Reis wrote:
> |
> | That's not a definition.
>
> Do you have one?
>
> Changing 0.125 to 0.0 is a dramatic change.

Not actually necessarily.

Remember: in order to get that difference you had to be operating with
values in the 2**1024 range.

Compared to those values, the difference between 0.0 and 0.125 can often
be considered truly insignificant.

What "often" means depends on what you're doing with the values, of
course.

			Linus