Re: text2interval again /
On 2013-03-09 07:48:08 -0600, Ralph Baker Kearfott wrote:
> Does that mean then that within the C-environment, one
> isn't assured the environment is 754-2008 conforming, and
> hence will not be 1788 conforming unless <math.h> is
> upgraded or the functionality of <math.h> is supplied
> separately for 1788 conformance? (We'd been discussing
> within a small group about accuracy requirements for
> specific functions, some of which we've -- within the
> group -- agreed should be correctly rounded.)
First, the C standard mentions the 1985 version. Moreover, even with
the 2008 version, the math functions are recommended, not required.
So, even though C provides math functions, they are not necessarily
correctly rounded. The error bound may not even be known, making all
IA implementation impossible from the std library version.
--
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)