[Cfp-interest] DFP: Conversions among FP types

[Jim Thomas]

On Dec 3, 2012, at 12:48 PM, Fred J. Tydeman wrote:

> Change 6.3.1.5#1:
>  "When a value of real floating type is converted to a real floating
>   type,..."
> to:
>  "When a value of real floating type is converted to a generic
>   floating type,…"

Why is this change needed?

> 
> Make the last sentence:
>  "Results of some implicit conversions may be represented in greater
>   range and precision than that required by the new type (see 6.3.1.8
>   and 6.8.6.4)."
> into its own paragraph.

i believe what you're trying to do is separate conversions to generic from conversions to decimal. Right? What do you see that's wrong with the current spec?

-Jim 

> 
> Add after 6.3.1.5#1.
>  [2] When a value of real floating type is converted to a decimal
>  floating type, if the value being converted cannot be represented
>  exactly, the result is correctly rounded with exceptions raised as
>  specified in IEC 60559, otherwise, it is unchanged.

> 
> 
> ---
> Fred J. Tydeman        Tydeman Consulting
> tydeman at tybor.com      Testing, numerics, programming
> +1 (775) 287-5904      Vice-chair of PL22.11 (ANSI "C")
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