On 2018-10-25 19:38:45 +0000, William Gillam wrote:
> GMP Developers:
>
>
> The "C99 style %a hex float" printing of floating point numbers in GMP does
> not seem to work properly. For example, as the attached example code
> demonstrates, 2 will be printed as
>
>
> 0x2.00p+0
>
>
> when using gmp_printf("%.2Fa"). This is not proper base 2 scientific
> notation---the mantissa is not in the interval [1,2). The correct
>
> printing should be
>
>
> 0x1.00p+1
No, 0x2.00p+0 is correct. The only requirement is that the first digit
be non-zero. C99 specifies: "where there is one hexadecimal digit
(which is nonzero if the argument is a normalized floating-point number
and is otherwise unspecified) before the decimal-point character".
--
Vincent Lefèvre <[email protected]> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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