[cfp-interest 3917] Re: Quantum exponent from fromfp functions

Fred J. Tydeman tydeman at tybor.com
Wed May 6 07:44:24 PDT 2026


On Wed, 06 May 2026 08:13:27 -0600 (PDT) Fred J. Tydeman wrote:
>
>Joseph S. Myers on the WG14 email list asks:
>
>Should we specify the preferred quantum exponent for the return value of 
>the fromfp functions for decimal floating types?  The lack of such a 
>specification is another issue arising from the change in C23 to give 
>these functions a floating return type, that I noticed while reviewing 
>N3877 (it is, however, a separate issue from that one about specifying the 
>sign of a zero return value, and can be addressed separately).


Since the result is supposed to be an integer,
the quantum exponent should be zero.


---
Fred J. Tydeman        Tydeman Consulting
tydeman at tybor.com      Testing, numerics, programming
+1 (702) 608-6093      Vice-chair of INCITS/C (ANSI "C")
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